1. oldal
U N I T C O N V E R S I O N SWritten by Gabor Nemeth
Conversion from metric to Conversion from English to CalculationsEnglish unit metric unit
Metr.symbol Multiply by Eng.name Eng.symbol Multiply by Metr.symbol Metr.quantity Eng.result Eng.quantity Metr.resultmm 0.03937 inches in 25.4 mm 1 0.03937 1 25.4m 3.28084 feet ft 0.3048 m 1 3.28084 1 0.3048m 1.09361 yards yd 0.9144 m 1 1.09361 1 0.9144km 0.621373 miles(land) mile(st) 1.60934 km 1 0.621373 1 1.60934l 0.264178 gallons(US) gal(US) 3.78533 l 1 0.264178 1 3.78533l 0.219976 gallons(UK) gal(UK) 4.54596 l 1 0.219976 1 4.54596l 0.0353147 cubic feet cu.ft 28.3168 l 1 0.0353147 1 28.3168
6.28994 barrel bbl 0.158984 1 6.28994 1 0.158984N 0.224809 pounds lbs 4.44822 N 1 0.224809 1 4.44822kg 2.20462 pounds lbs 0.453592 kg 1 2.20462 1 0.453592kPa 0.145038 psi psi 6.894745 kPa 1 0.145038 1 6.894745Mpa 145.038 psi psi 0.0068947 Mpa 1 145.038 1 0.0068947bar 14.5038 psi psi 0.0689475 bar 1 14.5038 1 0.0689475N.m 0.737561 foot pounds ft.lb 1.35582 N.m 1 0.737561 1 1.35582kg.m 7.23301 foot pounds ft.lb 0.138255 kg.m 3000 21699.03 1 0.138255kg/m 0.671971 pounds/foot lb/ft 1.48816 kg/m 1 0.671971 1 1.48816kg/l 8.34523 pounds/gallon ppg 0.119829 kg/l 1 8.34523 1 0.119829kg/l 62.4278 pounds/cu.ft pcf 0.0160185 kg/l 1 62.4278 1 0.0160185
0.3505 pounds/barrel lb/bbl 2.85307 1 0.3505 1 2.85307
150.959 barrel/day bbl/day 0.00662433 1 150.959 1 0.00662433l/m 0.001917 barrel/foot bbl/ft 521.601 l/m 1 0.001917 1 521.601l/m 0.0107640 cu foot/foot cu.ft/ft 92.090289 l/m 1 0.010764 1 92.090289l/m 0.0805214 US gallon/foot gal/ft 12.4191 l/m 1 0.0805214 1 12.4191l/m 0.0062899 barrel/meter bbl/m 158.984 l/m 1 0.0062899 1 158.984kPa/m 0.0442076 psi/foot psi/ft 22.62055 kPa/m 1 0.0442076 1 22.62055bar/m 4.42076 psi/foot psi/ft 0.2262055 bar/m 1 4.42076 1 0.2262055kPa/m 0.145038 psi/meter psi/m 6.894745 kPa/m 1 0.145038 1 6.894745bar/m 14.5038 psi/meter psi/m 0.0689475 kPa/m 1 14.5038 1 0.0689475kW 1.34102 horse power hp 0.7457 kW 1 1.34102 1 0.7457
0.69832 Ton.mile Ton.mile 1.43201 1 0.69832 1 1.43201
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m3 m3
kg/m3 kg/m3
m3/h m3/h
103daN.km 103daN.km
mailto:[emailprotected]
G4
Write the appropriate quantity into this column, and read the result in the cell close by
I4
Write the appropriate quantity into this column, and read the result in the cell close by
2. oldal
Conversion between metric units Calculations"A" "B" "C" "D" "E" "F"
Metr.symbol Multiply by Metr.symbol Metr.symbol Multiply by Metr. Symbol "A"quantity "C"result "D"quantity "F"resultbar 100 kPa kPa 0.01 bar 1 100 1 0.01bar 0.1 MPa MPa 10 bar 1 0.1 1 10N 0.102 kg kg 9.80665 N 1 0.102 1 9.80665daN 1.02 kg kg 0.980665 daN 1 1.02 1 0.980665N.m 0.102 kg.m kg.m 9.80665 N.m 1 0.102 1 9.80665
1 33.8 1 -17.22222
Conversion between british units Calculations"A" "B" "C" "D" "E" "F"
Eng.symbol Multiply by Eng.symbol Eng.symbol Multiply by Eng.symbol "A"quantiy "C"result "D"quantity "F"resultin 0.0833333 ft ft 12 in 1 0.0833333 1 12ft 0.333333 yd yd 3 ft 1 0.333333 1 3yd 0.0005682 Mile (stat) Mile (stat) 1760 yd 1 0.0005682 1 1760yd 0.0004929 Mile (naut.) Mile (naut.) 2029 yd 1 0.0004929 1 2029sq in 0.0069444 sq ft sq ft 144 sq in 1 0.0069444 1 144sq ft 0.111111 sq yd sq yd 9 sq ft 1 0.111111 1 9sq yd 0.0002066 acre acre 4840 sq yd 1 0.0002066 1 4840acres 0.0015625 sq mile(stat) sq mile(stat) 640 acre 1 0.0015625 1 640cu in 0.0005787 cu ft cu ft 1728 cu in 1 0.0005787 1 1728gal(US) 0.1336777 cu ft cu ft 7.48068 gal(US) 1 0.1336777 1 7.48068cu ft 0.1781113 bbl bbl 5.614467 cu ft 1 0.1781113 1 5.614467gal(US) 0.0238095 bbl bbl 42 gal(US) 1 0.0238095 1 42oz 0.0625 lbs lbs 16 oz 1 0.0625 1 16lb 0.0005 sh. tn sh. tn 2000 lbs 1 0.0005 1 2000gal/ft 0.1336777 cu.ft/ft cu.ft/ft 7.48068 gal/ft 1 0.1336777 1 7.48068cu.ft/ft 0.1781113 bbl/ft bbl/ft 5.614467 cu.ft/ft 1 0.1781113 1 5.614467gal/ft 0.0238095 bbl/ft bbl/ft 42 gal/ft 1 0.0238095 1 42ppg 7.48068 pcf pcf 0.1336777 ppg 1 7.48068 1 0.1336777
1 0 1 01 0 1 01 0 1 01 0 1 01 0 1 0
0C 9/5*0C+32 0F 0F 5/9*(0F-32) 0C
G37
Write the appropriate quantity into this column, and read the result in the cell close by
I37
Write the appropriate quantity into this column, and read the result in the cell close by
G46
Write the appropriate quantity into this column, and read the result in the cell close by
I46
Write the appropriate quantity into this column, and read the result in the cell close by
3. oldal
KICK SHEET / driller's method in metric units /Written by Gabor Nemeth
WELL: DATE:
Well data Mud pump dataHole size 8.5 in Pump Pump1.output Pump2.output
Original mud density cap. 0.0162 0OMD 1490 Present pump output in use 0.0162
Casing shoe data 9 Slow Pump Pressures/SPP/Size 9.625 in 9 pump1. pump2.Yield pres. 47300 kPa 118.42105 15 0 kPa 0 kPaM.depth 1900 m 118.42105 20 0 kPa 0 kPaTV.depth 1900 m 25 0 kPa 0 kPa
Hole depth 30 2800 kPa 0 kPaM.depth 3600 m 35 0 kPa 0 kPaTV.depth 3600 m 40 0 kPa 0 kPaTVD of bit 3600 m Present Slow Pump Pressure and SCRP.of LOT 30 2800 kPaat surface 12000 kPa MW.LOT-Mud weight during test 1240.00
W.o-gradient of mud in testsurface pressure with original mud W.o=MW.LOT * 9,81/1000 12.16 kPa/m
FBD-Formation breakdown pressure7340 kPa FBD=P.of LOT+(TVDcsg.shoe * W.o) 35112 kPa
MW.max-maximum mud weight fbd-formation breakdown gradientMW.max=FBD * 1000/(9,81 * TVDcsgshoe) fbd=FBD/TVDcsg.shoe 18.48 kPa/mMW.max 1884 W.1-gradient of original mud
W.1=OMD * 9,81/1000 14.62 kPa/m
Pre-recorded data Pump strokes TimeLength m Volume/pump cap. Pump strs/SPM
Surface line 50 0.009 0.45 28 str. 1 min.DP.1 3340 0.0091 30.39 1876 str. 63 min.DP.2 0 0 0.00 0 str. 0 min.HWDP 0 0 0.00 0 str. 0 min.
260 0.00401 1.04 64 str. 2 min.0 0 0.00 0 str. 0 min.
Drill string volume (surface to bit) 31.89 1968 str. 66 min.OH - without string 0 0.03661 0.00 0 str. 0 min.
260 0.0152 3.95 244 str. 8 min.0 0 0.00 0 str. 0 min.
HWDP-OP.hole 0 0 0.00 0 str. 0 min.DP.1-Op.hole 1440 0.02345 33.77 2084 str. 69 min.Open hole volume (bit to shoe) 37.72 2328 str. 78 min.
0 0 0.00 0 str. 0 min.0 0 0.00 0 str. 0 min.
HWDP-Csg 0 0 0.00 0 str. 0 min.DP.1-Csg 1900 0.02503 47.56 2936 str. 98 min.DP.2-Csg 0 0 0.00 0 str. 0 min.Total ann.volume (bit to surface) 85.28 5264 str. 175 min.Total mud volume in the hole 117.16 7232 str. 241 min.Active surface volume 150.00 9259 str. 309 min.
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Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
m3/str m3/strkg/m3 m3/str
SCR str/min
kg/m3
MAASPOMD-Maximum allowable annulus
MAASPOMD=FBD-((OMD*9,81*TVDcsgshoe)/1000)
MAASPOMD
kg/m3
Cap.m3/m Volume m3
DC1
DC2
DC1-Op.holeDC2-Op.hole
DC1-CsgDC2-Csg
DP
2D
P 1
HW
DP
DC
2
DC
1
Bit
DP
2D
P 1
HW
DP
DC
2
DC
1
Bit
mailto:[emailprotected]
A1
The driller's method of killing a well kick is accomplished in two circulation cycles. In the first circulation cycle, the influx is circulated out of the hole with original mud by keeping the Pdp on steady. After the annulus is clear of invading fluid, the well is closed in. The mud weight is adjusted to required density. In the second circulation cycle, the original mud is circulated out of the hole with new kill mud. Until the kill mud does not reach the bit, the Pcsg is kept constant. When the kill mud is at the bit, maintain the calculated Final Circulation Pressure, till the kill mud reaches the surface. Disadvantages of the method are the high annulus pressure / in case of gas kick / and the two circulations.
E9
The SCR being half or less of drilling pump rate. Establish it at the: -50% of drilling pump rate, -33% of drilling pump rate, -25% of drilling pump rate, For the following reasons: -Mud velocity in the annulus is reduced to the extent that cuttings are not transported to the surface anymore; this reduces the chance that the chokes get plugged while killing. Annular mud velocity must be less than 15 m/min. -The chokes, wheter adjustable or manual, can operate in the proper orifice range. -It allows the operator more time to react when well killing or mechanical problems develop. -It allows the crew more time to mix the kill mud.
F9
Slow rate circula-tion pressure has to be established: -at the beginning of each shift, -after each BHA changing, -after each mud property changing, -after each mud pump repairing, -after each 100 m drilling.
4. oldal
Total volumetotal volume in hole+active surface volume 267.16 16492 str. 550 min.NOTE: basic data readable data calculated dataKick data
SIDPP-Shut in drill pipe pressure 3500 kPaSICP-Shut in casing pressure 5000 kPaGain-Pit gain 1.80
Kick calculations
KMD-Kill mud density1589
SP-safety pressure /usually 145 psi/ 0 kPaBarite required 159.53
4200Total barite weight to be added =barite requirement * total volume 42620 kgVolume increase due to barite total barite/barite spec.grav. 10.15ICP-Initial circulating pressure ICP=SIDPP+SPP+SP 6300 kPaFCP-Final circulating pressure FCP=SPP*(KMD/OMD) 2986 kPaE=ICP-FCP 3314 kPaE/Drill string volume in strokes 1.68 kPa/strStatic and circulating pressure behaviourstrokes pressure
0 6300100 6132200 5963300 5795400 5627500 5458600 5290700 5122800 4953900 4785
1000 46171100 44481200 42801300 41111400 39431500 37751600 36061700 34381800 32701900 31011968 2986
Expected circulation status of driller's method Strokes Circ.period Pdp Pcsg MAASP 0 Start 6300 5000 7340 2328 6300 5000 7340 4736 6300 8498 12338 5264 6300 3500 7340 7232 2986 3500 7340 9561 2986 1548 7340 12496 2986 0 5492
Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
m3
KMD=OMD+(102 * (SIDPP+SP)/TVD bit kg/m3
(dw x (KMW-OMW))/(dw-KMW) kg/m3
dw-Barite density kg/m3
m3
Infl.at shoe
Infl.at surface
Infl. in air
KM at bit
KM at shoe
KM at surface
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
static and circulating pressure behaviour /metric units/
strokes
pre
ss
ure
/k
Pa
/
E64
It depends on company regulation, but recommended to calculate with the pressure due to Trip Margin
E100
Open choke while bringing up pump speed to slow circulating rate. Increase pump rate slowly and hold Pcsg constant until the pump rate reaches the slow circulating rate and after hold Pdp on steady.
E103
Until this stroke, hold the Pdp on steady by adjustable choke. If kill mud is not ready, circulate with this Pdp and Pcsg until the kill mud gets ready to pump into the hole.
E104
Until this stroke hold the Pcsg on steady by adjustable choke and from now hold the Pdp again on steady till Pcsg becomes to ~zero
5. oldal
NOTE: basic data readable data calculated dataCalculations
P.omd-hidrostatic pressure of the original mudP.omd=(OMD * TVD * 9,81)/1000 52621 kPaP.form-formation pressure P.form=SIDPP+P.omd 56121 kPaH.f-lenght of influx at bottom H.f=G/V.ab 118 mr-ratio between bottom hole and surface volumes r=V.ab/V.as 0.61K-ratio between depth and specific gravity 0.72d1-original mud specific gravity 1.49 kg/lM.A.C.P.-max.annulus casing pressure M.A.C.P.=Yield pres.* 0,80 37840 kPaP.Amax.-max. annulus pressure
8498 kPaH.s-lenght of influx at surface H.s=P.form/P.Amax * (K * r * H.f) 342 mV.gas-volume of influx at surface V.gas=H.s * V.as/1000 8.56Strokes of V.gas Strokes of V.gas=V.gas/pump input 528 str'sD.influx-density of influx D.influx=OMD-((SICP-SIDPP) * 1000/(9,81 * H.f) 199Possible Kick Type Gas
1848 kPa5492 kPa
MAASP+=(OMD-D.influx) * H.s * 0,052 4998 kPaMAASPgs-if the gas reached the surface(MAASPmax.)
12338 kPa1500 kPa
Rgm-gas migration 103 m34272 kPa
1.85Max.pit gain-pit gain when influx reached the surfaceMax.pit gain=0,158984*4*root2(P.form(psi)*G(bbl)*Vas(bbl/ft))/OMW(ppg)) 12
Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
P.Amax=SIDPP/2+root2(SIDPP2/4+9,81*(K*G*d1*Pform)/Vas
m3
kg/m3
Dp-pressure changing issued from mud density changingDp=((KMD-OMD) * 9,81 * csg.shoe depth)/1000MAASP KMD MAASP KMD=MAASPOMD-delta p.MAAS+-you can increase the MAASP if the gas reached the surface
MAASPgs=MAASPOMD+MAASP+= (MAASPmax.)DSICP- SICP changing based on a certain time.
Rgm=DSICP/W1New Pshoe New Pshoe=((OMW * TVDshoe * 9,81)/1000+SICP+DSICPV1=Volume of mud to be bled off due to New PshoeV1=((Phidr+SIDPP) * Gain)/(Phidr+SIDPP-DSICP) m3
m3
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
6300 6300 6300 6300
2986 2986 2986
5000 5000
8498
3500 3500
1548
73
40
73
40
12
33
8
73
40
73
40
73
40
54
92
Analysis of driller's method /metric unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
kP
a/
G118
There are five main possibilities to assamble the drillstring: - DC1-DC2-HWDP-DP1-DP2 - DC1-HWDP-DP1-DP2 - DC1-DC2-DP1-DP2 - DC1-DP1-DP2 - DP1-DP2 Since the DP2 never enters into the open hole, we can leave it out of consideration. The length of influx at bottom depends on the relation of drill-string and bottom hole. It means about thirty-two vari- ations to calculate the length of influx at bottom This program takes all of the main variations into conside-ration.
F120
See on "K" diagram
F128
If density of influx is: - 180 - 360 kg/m3 = gas - 600 - 839 kg/m3 = oil -1030 - 1438 kg/m3 = saltwater
F137
If the procedure is paused for any time(before the influx is circulated above the shoe), the Pcsg will increase due to gas migration. In this case read and record the Pcsg increasing into the cell close by.
F139
IF New Pshoe>FBD, bleed of mud
I144
This diagram is based on the "Expected cir-culation status of driller's method" chart
6. oldal
NOTE: basic data readable data calculated data
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
6300 6300 6300 6300
2986 2986 2986
5000 5000
8498
3500 3500
1548
73
40
73
40
12
33
8
73
40
73
40
73
40
54
92
Analysis of driller's method /metric unit/
Pdp
Pcsg
MAASP
strokesP
res
su
res
/k
Pa
/
7. oldal
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
6300 6300 6300 6300
2986 2986 2986
5000 5000
8498
3500 3500
1548
73
40
73
40
12
33
8
73
40
73
40
73
40
54
92
Analysis of driller's method /metric unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
kP
a/
8. oldal
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
6300 6300 6300 6300
2986 2986 2986
5000 5000
8498
3500 3500
1548
73
40
73
40
12
33
8
73
40
73
40
73
40
54
92
Analysis of driller's method /metric unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
kP
a/
9. oldal
KICK SHEET / driller's method in field units /Written by Gabor Nemeth
WELL: DATE:
Well data Mud pump dataHole size 8 1/2 in Pump Pump1.output Pump2.output
Original mud density cap. 0.1019 bbl/str 0.098 bbl/strOMD 12.43 ppg Present pump output in use 0.1019 bbl/str
Casing shoe data 9 Slow Pump Pressures/SPP/Size 9 5/8 in 9 pump1. pump2.Yield pres. 6860 psi 388.5611 15 130 psi 110 psiM.depth 6234 ft 388.5611 20 190 psi 170 psiTV.depth 6234 ft 25 270 psi 240 psi
Hole depth 30 406 psi 350 psiM.depth 11811 ft 35 490 psi 420 psiTV.depth 11811 ft 40 560 psi 500 psiTVD of bit 11811 ft Present Slow Pump Pressure and SCRP.of LOT 30 406 psiat surface 1740 psi MW.LOT-Mud weight during test 10.35 ppg
W.o-gradient of mud in testsurface pressure with original mud W.o=MW.LOT * 0,052 0.54 psi/ft
FBD-Formation breakdown pressure1064 psi FBD=P.of LOT+(TVDcsg.shoe * W.o) 5095 psi
MW.max-maximum mud weight fbd-formation breakdown gradientMW.max=FBD/(0,052 * TVDcsgshoe) fbd=FBD/TVDcsg.shoe 0.82 psi/ftMW.max 15.72 ppg W.1-gradient of original mud
W.1=OMD * 0,052 0.65 psi/ft
Pre-recorded data Pump strokes TimeLength ft Cap.bbl/ft Vol.bbl Volume/pump cap. Pump strs/SPM
Surface line 164 0.017 2.79 27 str. 1 min.DP.1 10958.01 0.017445 191.16 1876 str. 63 min.DP.2 0 0 0.00 0 str. 0 min.HWDP 0 0 0.00 0 str. 0 min.
853.02 0.007687 6.56 64 str. 2 min.0.00 0 0.00 0 str. 0 min.
Drill string volume (surface to bit) 200.51 1968 str. 66 min.OH - without string 0 0.070187 0.00 0 str. 0 min.
853.02 0.029138 24.86 244 str. 8 min.0.00 0 0.00 0 str. 0 min.
HWDP-OP.hole 0 0 0.00 0 str. 0 min.DP.1-Op.hole 4724.41 0.044954 212.38 2084 str. 69 min.Open hole volume (bit to shoe) 237.24 2328 str. 78 min.
0 0 0.00 0 str. 0 min.0 0 0.00 0 str. 0 min.
HWDP-Csg 0 0 0.00 0 str. 0 min.DP.1-Csg 6233.60 0.047983 299.11 2935 str. 98 min.DP.2-Csg 0 0 0.00 0 str. 0 min.Total ann.volume (bit to surface) 536.34 5263 str. 175 min.Total mud volume in the hole 736.85 7231 str. 241 min.Active surface volume 943.49 9259 str. 309 min.
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Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
SCR str/min
MAASPOMD-Maximum allowable annulus
MAASPOMD=FBD-(OMD*0,052*TVDcsgshoe)
MAASPOMD
DC1
DC2
DC1-Op.holeDC2-Op.hole
DC1-CsgDC2-Csg
DP
2D
P 1
HW
DP
DC
2
DC
1
Bit
mailto:[emailprotected]
A1
The driller's method of killing a well kick is accomplished in two circulation cycles. In the first circulation cycle, the influx is circulated out of the hole with original mud by keeping the Pdp on steady. After the annulus is clear of invading fluid, the well is closed in. The mud weight is adjusted to required density. In the second circulation cycle, the original mud is circulated out of the hole with new kill mud. Until the kill mud does not reach the bit, the Pcsg is kept constant. When the kill mud is at the bit, maintain the calculated Final Circulation Pressure, till the kill mud reaches the surface. Disadvantages of the method are the high annulus pressure / in case of gas kick / and the two circulations.
E9
The SCR being half or less of drilling pump rate. Establish it at the: -50% of drilling pump rate, -33% of drilling pump rate, -25% of drilling pump rate, For the following reasons: -Mud velocity in the annulus is reduced to the extent that cuttings are not transported to the surface anymore; this reduces the chance that the chokes get plugged while killing. Annular mud velocity must be less than 50 ft/min. -The chokes, wheter adjustable or manual, can operate in the proper orifice range. -It allows the operator more time to react when well killing or mechanical problems develop. -It allows the crew more time to mix the kill mud.
F9
Slow rate circula-tion pressure has to be established: -at the beginning of each shift, -after each BHA changing, -after each mud property changing, -after each mud pump repairing, -after each 328 ft drilling.
10. oldal
Total volumetotal volume in hole+active surface volume 1680.34 16490 str. 550 min.NOTE: basic data readable data calculated dataKick data
SIDPP-Shut in drill pipe pressure 508 psiSICP-Shut in casing pressure 725 psiGain-Pit gain 11.32 bbl
Kick calculations
KMD-Kill mud density13.26 ppg
SP-safety pressure /usually 145 psi/ 0 psiBarite required 55.88 lb/bbl
35.05 ppgTotal barite weight to be added =barite requirement * total volume 93903 lbsVolume increase due to barite total barite/barite dens * 42 63.8 bblsICP-Initial circulating pressure ICP=SIDPP+SPP+SP 914 psiFCP-Final circulating pressure FCP=SPP*(KMD/OMD) 433 psiE=ICP-FCP 481 psiE/Drill string volume in strokes 0.24 psi/strStatic and circulating pressure behaviourstrokes pressure
0 914100 890200 865300 841400 816500 792600 767700 743800 718900 694
1000 6701100 6451200 6211300 5961400 5721500 5471600 5231700 4981800 4741900 4501968 433
Expected circulation status of driller's method Strokes Circ.period Pdp Pcsg MAASP 0 Start 914 725 1064 2328 914 725 1064 4735 914 1233 1790 5263 914 508 1064 7231 433 508 1064 9559 433 225 1064 12495 433 0 796
Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
KMD=OMD+(SIDPP+SP)/(TVD bit * 0,052)
((dw x (KMW-OMW))/(dw-KMW)dw-Barite density
Infl.at shoe
Infl.at surface
Infl. in air
KM at bit
KM at shoe
KM at surface
01
00
20
03
00
40
05
00
60
07
00
80
09
00
10
00
11
00
12
00
13
00
14
00
15
00
16
00
17
00
18
00
19
00
19
68
200
400
600
800
1000
1200
1400
1600
1800
2000
static and circulating pressure behaviour /field units/
strokes
pre
ss
ure
/p
si/
E64
It depends on company regulation, but recommended to calculate with the pressure due to Trip Margin
E65
dw(lbs/bbl)*/KMW-OMW/(lbs/ft3) dw(lbs/ft3)-KMW(lbs/ft3)
E100
Open choke while bringing up pump speed to slow circulating rate. Increase pump rate slowly and hold Pcsg constant until the pump rate reaches the slow circulating rate and after hold Pdp on steady.
E103
Until this stroke, hold the Pdp on steady by adjustable choke. If kill mud is not ready, circulate with this Pdp and Pcsg until the kill mud gets ready to pump into the hole.
E104
Until this stroke hold the Pcsg on steady by adjustable choke and from now hold the Pdp again on steady till Pcsg becomes to ~zero
11. oldal
NOTE: basic data readable data calculated dataCalculations
P.omd-hidrostatic pressure of the original mudP.omd=OMD * TVD * 0,052 7637 psiP.form-formation pressure P.form=SIDPP+P.omd 8145 psiH.f-lenght of influx at bottom H.f=G/V.ab 389 ftr-ratio between bottom hole and surface volumes r=V.ab/V.as 0.61K-ratio between depth and specific gravity 0.72d1-original mud specific gravity 1.49 kg/lM.A.C.P.-max.annulus casing pressure M.A.C.P.=Yield pres.* 0,80 5488 psiP.Amax.-max. annulus pressure
1233 psiH.s-lenght of influx at surface H.s=P.form/P.Amax * (K * r * H.f) 1122 ftV.gas-volume of influx at surface V.gas=H.s * V.as 53.84 bblStrokes of V.gas Strokes of V.gas=V.gas/pump input 528 str'sD.influx-density of influx D.influx=OMD-(SICP-SIDPP)/(H.f * 0,052) 1.69 ppgPossible Kick Type Gas
268 psi796 psi
MAASP+=(OMD-D.influx) * H.s * 0,052 726 psiMAASPgs-if the gas reached the surface(MAASPmax.)
1790 psi218 psi
Rgm-gas migration 336 ft4973 psi
12 bblMax.pit gain-pit gain when influx reached the surfaceMax.pit gain=4 * root2((P.form * G * Vas)/OMW) 75 bbl
Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!
P.Amax=(SIDPP(kPa)/2+root2(SIDPP(kPa)2/4+9,81*(K*G(m3)*d1*Pform(kPa))/Vas(m3))*0,145038
Dp-pressure changing issued from mud density changingDp=(KMD-OMD) * 0,052 * csg.shoe depthMAASP KMD MAASP KMD=MAASP1-delta p.MAAS+-you can increase the MAASP if the gas reached the surface
MAASPgs=MAASPOMD+MAASP+= (MAASPmax.)DSICP- SICP changing based on a certain time.
Rgm=DSICP/W1New Pshoe New Pshoe=(OMW * TVDshoe * 0,052)+SICP+DSICPV1=Volume of mud to be bled off due to New PshoeV1=((Phidr+SIDPP) * Gain)/(Phidr+SIDPP-DSICP)
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
914 914 914 914
433 433 433
725 725
1233
508 508
225
10
64
10
64
17
90
10
64
10
64
10
64
79
6
Analysis of driller's method /field unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
ps
i/
G118
There are five main possibilities to assamble the drillstring: - DC1-DC2-HWDP-DP1-DP2 - DC1-HWDP-DP1-DP2 - DC1-DC2-DP1-DP2 - DC1-DP1-DP2 - DP1-DP2 Since the DP2 never enters into the open hole, we can leave it out of consideration. The length of influx at bottom depends on the relation of drill-string and bottom hole. It means about thirty-two vari- ations to calculate the length of influx at bottom This program takes all of the main variations into conside-ration.
F120
See on "K" diagram
F128
If density of influx is: -1,5 - 3,0 ppg = gas -5,0 - 7,0 ppg = oil -8,6 - 12 ppg = saltwater
F137
If the procedure is paused for any time(before the influx is circulated above the shoe), the Pcsg will increase due to gas migration. In this case read and record the Pcsg increasing into the cell close by.
F139
IF New Pshoe>FBD, bleed of mud
I144
This diagram is based on the "Expected cir-culation status of driller's method" chart
12. oldal
NOTE: basic data readable data calculated data
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
914 914 914 914
433 433 433
725 725
1233
508 508
225
10
64
10
64
17
90
10
64
10
64
10
64
79
6
Analysis of driller's method /field unit/
Pdp
Pcsg
MAASP
strokesP
res
su
res
/p
si/
13. oldal
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
914 914 914 914
433 433 433
725 725
1233
508 508
225
10
64
10
64
17
90
10
64
10
64
10
64
79
6
Analysis of driller's method /field unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
ps
i/
14. oldal
Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
914 914 914 914
433 433 433
725 725
1233
508 508
225
10
64
10
64
17
90
10
64
10
64
10
64
79
6
Analysis of driller's method /field unit/
Pdp
Pcsg
MAASP
strokes
Pre
ss
ure
s /
ps
i/
Depth Balancing specific gravity Depth Balancing specific gravity
meter1,2 kg/l 1,5 kg/l 1,8 kg/l 2,1 kg/l
meter1,2 kg/l 1,5 kg/l 1,8 kg/l 2,1 kg/l
Coefficient "K" Coefficient "K"0 1.86 1.85 1.84 1.83 5300 0.6 0.55 0.5 0.46
100 1.81 1.8 1.79 1.77 5400 0.595 0.54 0.495 0.45200 1.76 1.73 1.72 1.71 5500 m 0.59 0.535 0.49 0.445300 1.7 1.67 1.61 1.6 5600 0.58 0.53 0.48 0.44400 1.65 1.61 1.55 1.54 5700 0.57 0.52 0.475 0.43
500 m 1.6 1.55 1.5 1.49 5800 0.565 0.515 0.47 0.425600 1.57 1.52 1.45 1.43 5900 0.56 0.51 0.46 0.42700 1.52 1.47 1.41 1.39 6000 m 0.555 0.5 0.455 0.41800 1.48 1.43 1.35 1.33 6100 0.55 0.495 0.45 0.4900 1.44 1.38 1.31 1.27 6200 0.54 0.49 0.445 0.395
1000 m 1.41 1.35 1.28 1.24 6300 0.535 0.485 0.44 0.391100 1.38 1.31 1.24 1.2 6400 0.53 0.48 0.435 0.3851200 1.35 1.27 1.2 1.16 6500 m 0.525 0.47 0.425 0.381300 1.32 1.24 1.16 1.12 6600 0.52 0.465 0.42 0.3751400 1.29 1.21 1.13 1.08 6700 0.51 0.46 0.415 0.37
1500 m 1.25 1.17 1.1 1.05 6800 0.505 0.455 0.41 0.3651600 1.22 1.14 1.07 1.01 6900 0.5 0.45 0.4 0.361700 1.2 1.12 1.04 0.98 7000 m 0.495 0.445 0.395 0.3551800 1.17 1.09 1.01 0.95 71001900 1.14 1.05 0.98 0.92 7200
2000 m 1.12 1.03 0.96 0.9 73002100 1.09 1.01 0.93 0.87 74002200 1.06 0.98 0.91 0.85 7500 m2300 1.04 0.95 0.88 0.82 76002400 1.01 0.93 0.86 0.8 7700
2500 m 0.99 0.9 0.84 0.78 78002600 0.97 0.88 0.82 0.76 79002700 0.95 0.86 0.8 0.74 8000 m2800 0.93 0.84 0.78 0.722900 0.91 0.82 0.76 0.7
3000 m 0.89 0.81 0.75 0.69 0.82 #N/A3100 0.87 0.79 0.73 0.673200 0.85 0.77 0.72 0.663300 0.83 0.75 0.7 0.653400 0.82 0.74 0.69 0.63
3500 m 0.8 0.73 0.67 0.623600 0.79 0.71 0.66 0.613700 0.77 0.7 0.65 0.63800 0.76 0.69 0.64 0.593900 0.74 0.68 0.63 0.58
4000 m 0.73 0.67 0.62 0.574100 0.72 0.65 0.61 0.564200 0.7 0.64 0.6 0.554300 0.69 0.63 0.59 0.544400 0.68 0.62 0.58 0.53
4500 m 0.67 0.61 0.57 0.524600 0.66 0.6 0.56 0.514700 0.65 0.59 0.55 0.54800 0.64 0.585 0.54 0.494900 0.63 0.58 0.53 0.485
5000 m 0.625 0.575 0.525 0.48
03
00
60
09
00
12
00
15
00
m1
80
02
10
02
40
02
70
03
00
0 m
33
00
36
00
39
00
42
00
45
00
m4
80
05
10
05
40
05
70
06
00
0 m
63
00
66
00
69
00
72
00
75
00
m7
80
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Balancing mud spec.gravity
1,2 kg/l
1,5 kg/l
1,8 kg/l
2,1 kg/l
See all of data behind this chart"K"
5100 0.62 0.565 0.52 0.475200 0.61 0.56 0.51 0.465
03
00
60
09
00
12
00
15
00
m1
80
02
10
02
40
02
70
03
00
0 m
33
00
36
00
39
00
42
00
45
00
m4
80
05
10
05
40
05
70
06
00
0 m
63
00
66
00
69
00
72
00
75
00
m7
80
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Balancing mud spec.gravity
1,2 kg/l
1,5 kg/l
1,8 kg/l
2,1 kg/l
See all of data behind this chart"K"
03
00
60
09
00
12
00
15
00
m1
80
02
10
02
40
02
70
03
00
0 m
33
00
36
00
39
00
42
00
45
00
m4
80
05
10
05
40
05
70
06
00
0 m
63
00
66
00
69
00
72
00
75
00
m7
80
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Balancing mud spec.gravity
1,2 kg/l
1,5 kg/l
1,8 kg/l
2,1 kg/l
See all of data behind this chart"K"
03
00
60
09
00
12
00
15
00
m1
80
02
10
02
40
02
70
03
00
0 m
33
00
36
00
39
00
42
00
45
00
m4
80
05
10
05
40
05
70
06
00
0 m
63
00
66
00
69
00
72
00
75
00
m7
80
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Balancing mud spec.gravity
1,2 kg/l
1,5 kg/l
1,8 kg/l
2,1 kg/l
See all of data behind this chart"K"
Effect of some different problem on pressures, string weight, pit level, pump rate
Problem Pit level Action to be taken
Choke wash out Decrease Decrease Same Increase Increase
Plugging choke Increase Increase Same Same Decrease
Moderate losses Decrease Decrease Same Decrease Increase
Total losses Decrease Decrease Increase
Drill string wash out Decrease Same Same Same Increase
Drill string twist off Decrease Same Decrease Same Increase
Plugging bit nozzle Increase Same Same Same Decrease
Bit nozzle wash out Decrease Same Same Same Increase
DP pressure
Ann. pressure
String weight
Pump rate /SPM/
Keep Pch cons- tant by pinching
choke. Close in and continue with other
choke
Keep Pch cons- tant by opening
choke. Close in and continue with other
choke
Mix some LCM and reduce circ. pres. with some psi, but
bottom- hole pres.should be
higher than form. pres.
Strong decrease no
returns
Increase, due to less
bouyancy
Try to spot heavy mud of sufficient
weight through the drill string to kill the well from the btm. to the loss
zone. Consi- deration must be given to spotting
Barite or Gunk plugs through the drill string to seal off influx from the
hole
Keep Pch cons- tant and conti- nue
at lower circ. pressure. If not
possible use Volumetric Met-
hod
Keep Pch cons- tant and conti- nue
at higher circ. pressure. If
completely plug- ged, use Volu- metric Method
Keep Pch cons- tant and conti- nue
at lower circ. pressure. If not
possible use Volumetric Method
Pump failure Decrease Decrease Same Same Increase
Keep Pch cons- tant, observe circ. Pressure. Close in
and start other pump
21. oldal
LEAK OFF TESTWritten by Gabor Nemeth
Preparations
1. Drill out the casing shoe. / be sure, there is no flapper valve in the string !/2. Drill ahead 5-50 ft; (1.5-15 m.) / it depends on company regulation /.3. Circulate for conditioning mud in the hole. /no cuttings in the mud !/4. Get ready a cementing pump with a sensitive pressure gauge.5. Calculate the pressure loss due to gel strength of mud.6. Pull the string above the casing shoe.Data Metric unit Field unitL = length of string 3054.6 m 9000 ft
10 10d = DP ID 3 3/16 in 3 3/16 in
0 in 8 1/2 in0 in 5 in
2480 m 9000 ftTMW = mud weight during LOT 1280 10.35 ppg
Calculations of pressure losses
Formula to be used, when LOT is performed through DP
94 psi723 kPa
Formola to be used, when LOT is performed on annulus
86 psi0 kPa
Procedure
1. Fill up cementing line & bell nipple with mud by cementing pump and stop pump.2. Close BOP / bag type or pipe rams /3. Start cementing pump slowly and as soon as pressure starts to show on the gauge,
4. Wait some 3 minutes and plot pressure versus volume.
the graph.6. Continue this way until the pressure increase becomes less than the previous increase i.e. the line on the graph starts bending to the right. This point is the leak off point and gives the value for the MAASP.
off has now started and the pressure reached is the formation break down pressure.8. Bleed-off pressure, check returns and very carefully repeat pressure building up to get a check on the result.
[emailprotected]
to = yield value of mud lb/100ft2 lb/100ft2
dc = casing IDdo = DP ODTVDcsg.shoe = true vertical depth of casing shoe
kg/m3
Fill in ONLY the section above with data and the program will calculate by itself !!!
Pgs-pressure loss due to gel strength of mud
Pgs=L x (to/(300 x d)) / field unit /Pgs=L x (to/(13,2623 x d)) / metric unit /
Pgs=L x (to/(300 x (dc-do)) / field unit /Pgs=L x (to/(13,2623 x (dc-do)) / metric unit /
pump 1/2 bbl / 0,08 m3 / more and stop pump.
5. Pump 1/2 bbl / 0,08 m3 / more, stop pump, wait 3 minutes and plot the next point on
7. Pump less volume ( say 1/4 bbl / 0,04 m3 /), wait and plot this point on the graph. Leak
mailto:[emailprotected]
E14
If LOT is performed on annulus, enter "0" to the "F14" and "H14" cells!
E15
If LOT is performed through DP, enter "0" to the "F15" and "H15" cells!
E16
If LOT is performed through DP, enter "0" to the "F16" and "H16" cells!
22. oldal
9. At the end, correct the leak off pressure with Pgs and the result gives the real leak off pressure.
Chart / field unit /
Pres. psi Vol. bbl Time min0 0 0
510 0.5 11020 1 21530 1.5 32040 2 42580 2.5 52620 3 62520 3.5 72480 4 82440 92350 102300 112240 122200 132200 142200 152200 162200 172200 18
Fill in this chart with data
Leak off point pressure (read on graph and write here) 2580 psi
2486 psi2494 psi
10. IMPORTANT: Do not break the formation but stop when leak off starts!!!
Calculation of real Leak Off Pressure /PLOT/
PLOT= Leak off point pressure (read on graph) - pressure loss due to gel strenght
PLOT when LOT is performed through DPPLOT when LOT is performed on annulus
0 1 2 3 4 5 6 7 8 9
10
11
12
13
14
15
16
17
18
250
500
750
1000
1250
1500
1750
2000
2250
2500
2750
3000
3250
3500
3750
4000
510
102
153
204
258
262
252
248
244
235
230
224
220
220
220
220
220
220
Leak Off Test
Time /min/
Pre
ssu
re /
psi
/
23. oldal
Real leak off pressure determines the Maximum Allowable Annulus Surface Pressure.
New Mud Weight /NewMW/ ( write here ) 10.35 ppg
MAASPnew mud- MAASP with new mud weight
2486 psi
Chart / metric unit /
Pres.kPa Time min
0 0 03516 0.16 17032 0.32 2
10548 0.48 314064 0.64 417788 0.8 518133 0.88 617926 0.96 716547 0.96 815996 915720 1015582 1115513 1215478 1315444 1415444 1515444 1615444 1715444 18
Fill in this chart with data
Leak off point pressure (read on graph and write here) 18800 kPa
18077 kPa
PLOT=MAASP. MAASP has to be recalculated for the appropriate mud weight.
MAASPnew mud=MAASP-((NewMW-TMW) x 0,052 x TVDcsg.shoe)
Vol. m3
Calculation of real Leak Off Pressure /PLOT/
PLOT= Leak off point pressure (read on graph) - pressure loss due to gel strenght
PLOT when LOT is performed through DP
0 1 2 3 4 5 6 7 8 9
10
11
12
13
14
15
16
17
18
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
12000
13000
14000
15000
16000
17000
18000
19000
20000
21000
22000
23000
24000
351
6
703
2
105
48
140
64
177
88
181
33
179
26
165
47
159
96
157
20
155
82
155
13
154
78
154
44
154
44
154
44
154
44
154
44
Leak Off Test
Time /min/
Pre
ssu
re /
kPa/
24. oldal
0 kPa
Real leak off pressure determines the Maximum Allowable Annulus Surface Pressure.
New Mud Weight /NewMW/ ( write here ) 1170
20754 kPa
PLOT when LOT is performed on annulus
PLOT=MAASP. MAASP has to be recalculated for the appropriate mud weight.
kg/m3
MAASPnew mud- MAASP with new mud weightMAASPnew mud=MAASP-(((NewMW-TMW) x 9,81 x TVDcsg.shoe)/1000)
Volumetric StrippingWritten by Vilmos Barka
Procedure: 1. Closing in the well. Determine the influx volume.Record pressure at two minute intervals. After closed-in pressures have stabilized complete strip sheet. Further record pressures at five minute intervals or after running in each stand. 2. Determine the volume of mud in the OH/DC annulus equivalent to one psi of hydrostatic head. Equivalent volume per psi = Ann. Volume per ft / Mud gradient ( bbl/psi ) 3. Determine a convenient working pressure increment PW. 4. Convert a selected working pressure PW /psi/ into an equivalent working
5. Determine the extra back pressure. 6. Adjust the closing pressure on the annular preventer to a minimum, avoid leakage. 7. Allow annulus pressure to build up to Pchoke whilst stripping the first stand. Pchoke = P an. + PS +PW P an > initial closed-in annulus pressure before second built up PS > allowance for the loss of hydrostatic head as DC enter the influx PW > working pressure increment 8. Maintain Pchoke constant whilst stripping pipe. Closed-end displacement of drillpipe is purged into the trip and stripping tank. 9. Avoid excessive surge pressure.
has accumulated into the trip tank.
tank at constant choke pressure, Pchoke is allowed increase again by the value PW now becomes Pchoke (where Pchoke 1 = Pchoke + PW )12.Fill each stand and remove any sharp edges or tong marks from the pipe body.13.By repeating this cycle is maintained nearly constant BHP14. Any data should be record 15.On bottom the well can be kill using the " driller's method ". Be sure the string is full of mud. Pump slow rate from the bit to the Gray-valve. Stop pump, check trapped pressure and then continue circulation.16.To avoid differential sticking consider moving the string trough the preventer.
[emailprotected]
volume a DV in the OH/DC annulus. ( Recommended 40-50 psi )
10.Maintain Pchoke constant at the above value until a volume of DV barrels
11.When the additional mud volume DV barrels has accumulated in the trip
mailto:[emailprotected]
Written by Vilmos Barka
Measured depth 0 ft DC C/E cap.: lb/ft
Csg. Measured depth 0 ft Open hole capacity: 0.0681 bbl/ft
Total length of DP 9433 ft OH/DC ann volume: 0.0302 bbl/ft
Number of DP stand 100 mud weight: 15 ppg
DP closed-end cap.: 0.0252 bbl/ft Influx volume: 9.5 bbl
DP capacity: 0 bbl/ft Pressure annulus: 180 psi
DP metal cap.: 0 bbl/ft Pressure drillpipe: 0 psi
19.50 lb/ft Working pres.incr.(Pw) 40 psi
6.25 in influx gradient (pi) : 0.1 psi/ft
Cylindrical Tank Rectangle Tank
Dia (ft ) H ( ft ) W ( ft ) L ( ft ) H ( ft )
Dimensions of trip tank: 3.2 8 4 4 8
Dimensions of strip tank: 3.2 8 4 4 4
Pre Kick Information (to be record on standard kill sheet ) !
Calculation of Wellbore force ( WBF )
WBF= 6522 lbs
1000 lbs
Hence: Minimum necessery weight of string to perform the procedure 6522 lbs
Calculation of minimum necessery length of string
434 ft
Buoyancy factor= Buoyancy factor = ( 65,5 - MW ) / 65,5 0.77
Hence: Minimum necessery length of string to perform the procedure 434 ft
Trip Tank:
Total volume 11.45 bbl 22.80 bbl
Volume per inch 0.12 bbl/in 0.24 bbl/in
Volume per cm 0.05 bbl/cm 0.09 bbl/cm
Stripping Tank:Total volume 11.45 bbl 11.40 bbl
Volume per inch 0.12 bbl/in 0.24 bbl/in
Volume per cm 0.05 bbl/cm 0.09 bbl/cm
Stripping worksheet ( field unit )[emailprotected]
Nominal weight of DP ( Wdp )
Tool joint OD ( ODtj )
Fill in ONLY the section above and the program will calculate by itself !!!
WBF = (ODtj)^2 x 0,7854 x Pann + Ffr
Friction factor ( Ffr )
Length of string ( Ldp )= Ldp= WBF / ( Wdp x BF )
mailto:[emailprotected]
Closed-end Displacement of DP Stand:Average stand length 94 ft
DP C/E displacement 2.38 bbl/stand
F factor calculation:F = F= ( 1 / OH cap.) X ( p1 - pi ) X ((Ohcap / [OH/DC ann.cap] ) - 1 ) 12.5 psi/bbl
mud gradient (p1): 0.78 psi/ft
Calculation of the volume in the OH/DC ann. equivalent to the selected loss of hydrostatic pressure. For one psi loss of hydrostatic pressure we calculate the volume.
OH/DC ann.vol. per ft. / mud gradient 0.04 bbl/psi
Equivalent volume of the selected Pw increment 1.55 bbl
The volume per inch in the trip tank 0.12 bbl/inch 0.24 bbl/in
The selected Pw /psi/ increment is equivalent 13 inch 6 1/2 in
Calculations for Pchoke :
Pchoke = Pchoke = Pan + Ps + Pw 339 psi
Ps = Ps = Inf.vol. / OH cap. X (p1-pi) X (( OH cap /[OH/ DCann. Cap]) - 119 psi
Ps = Ps = F x influx volume ( bbls ) 119 psi
Pan > initial close-in pressure before 2nd build-up. Reading from Ann. press. gauge.
Ps > allowance for the loss of hydrostatic head as DC enter the influx.
Pw > selected, set for yourself. ( recommended 40-50 psi )
F > derived factor
Procedure:1, Allow Pan to become Pchoke Pchoke= Pann + Ps + Pw 339 psi
2, After running each stand bleed-off into the stripping tank 2.38 bbl
19 8/9 in 10 in3, When the level in the trip tank increases 6 1/2 in, increase Pchoke 40 psi
13 in, increase Pchoke 40 psi
4, Repeat this cycle until bit is on bottom.
Equivalent Working Volume for Volumetric Steps D V:
DV =
D V > triptank level increase per Pw step
Strip Sheet
Pchoke= Pchoke = Pann +Ps +Pw 339 psi
P annulus 180 psi
F-factor 12.5 psi/bbl
Volume Influx 9.5 bbls
Ps = Ps = F x Vi 119 psi
Pw selected 40 psi
in (cm)
Time Stand no. Pchoke T.T.level Remarks Triptank level with req. Pchoke
T.T. -level Pch
DV= division in triptank
Written by Vilmos Barka
Measured depth 0 m DC C/E cap.:
Csg. Measured depth 0 m Open hole capacity: 0.03552
Total length of DP 2875.2 m OH/DC ann volume: 0.01575
Number of DP stand 100 mud weight: 1797
DP closed-end cap.: 0.01314 Influx volume: 1.51
DP capacity: 0 Pressure annulus: 1241 Kpa
DP metal cap.: 0 Pressure drillpipe: 0 Kpa
29.02 kg/m 276 Kpa
158.75 mm influx gradient (pi) : 2.26 Kpa/m
Cylindrical Tank Rectangle Tank
Dia (m ) H ( m ) W (m) L ( m ) H ( m )
Dimensions of trip tank: 0.975 2.44 1.22 1.22 2.44
Dimensions of strip tank: 0.975 2.44 1.22 1.22 1.22
Pre Kick Information (to be record on standard kill sheet ) !
Calculation of Wellbore force ( WBF )
WBF= WBF = ((ODtj)^2 x p/4 x Pann x 1,02)+ Ffr 2959 kg
454 kg
Hence: Minimum necessery weight of string to perform the procedure 2959 kg
Calculation of minimum necessery length of string
132 m
Buoyancy factor= Buoyancy factor=1-(mud dens./steel dens.) 0.77
Hence: Minimum necessery length of string to perform the procedure 132 m
Trip Tank:
Total volume 1.82 3.62
Volume per cm 7.46 l/cm 14.86 l/cm
Stripping Tank:Total volume 1.82 1.81
Volume per cm 7.46 l/cm 14.86 l/cm
Stripping worksheet ( metric unit )[emailprotected]
m3/m
m3/m
m3/m
kg/m3
m3/m m3
m3/m
m3/m
Nominal weight of DP ( Wdp ) Working pres.incr.(Pw)
Tool joint OD ( ODtj )
Fill in ONLY the section above and the program will calculate by itself !!!
Friction factor ( Ffr )
Length of string ( Ldp )= Ldp= WBF / ( Wdp x BF )
m3 m3
m3 m3
mailto:[emailprotected]
Closed-end Displacement of DP Stand:Average stand length 28.75 m
DP C/E displacement 0.378
F factor calculation:F = F= ( 1 / OH cap.) X ( p1 - pi ) X ((Ohcap / [OH/DC ann.cap] ) - 1 ) 543
mud gradient (p1): 17.63 Kpa/m
Calculation of the volume in the OH/DC ann. equivalent to the selected loss of hydrostatic pressure. For one psi loss of hydrostatic pressure we calculate the volume.
OH/DC ann.vol. per m / mud gradient 0.00089
Equivalent volume of the selected Pw increment 0.246
The volume per cm in the trip tank 7.46 l/cm 14.86 l/cm
The selected Pw /Kpa/ increment is equivalent 33 cm 16.6 cm
Calculations for Pchoke :
Pchoke = Pchoke = Pan + Ps + Pw 2337 Kpa
Ps = Ps = Inf.vol. / OH cap. X (p1-pi) X (( OH cap /[OH/ DCann. Cap]) - 820 Kpa
Ps = Ps = F x influx volume ( m3 ) 820 Kpa
Pan > initial close-in pressure before 2nd build-up. Reading from Ann. press. gauge.
Ps > allowance for the loss of hydrostatic head as DC enter the influx.
Pw > selected, set for yourself. ( recommended 300 Kpa )
F > derived factor
Procedure:1, Allow Pan to become Pchoke Pchoke= Pann + Ps + Pw 2337 Kpa
2, After running each stand bleed-off into the stripping tank 0.38
50.6 cm 25.4 cm3, When the level in the trip tank increases 16.6 cm, increase Pchoke 276 Kpa
33 cm, increase Pchoke 276 Kpa
4, Repeat this cycle until bit is on bottom.
m3/stand
Kpa/m3
Equivalent Working Volume for Volumetric Steps D V:
DV = m3/Kpa
m3
D V > triptank level increase per Pw step
m3
Strip Sheet
Pchoke= Pchoke = Pann +Ps +Pw 2337 Kpa
P annulus 1241 Kpa
F-factor 543
Volume Influx 1.51
Ps = Ps = F x Vi 820 Kpa
Pw selected 276 Kpa
cm
Time Stand no. Pchoke T.T.level Remarks Triptank level with req. Pchoke
T.T. -level Pch
Kpa/m3
m3
DV= division in triptank
35. oldal
General data
Open hole capacitysize in " cap.in l/m cap.in bbl/m cap.in bbl/ft
26 342.5 2.1543 0.65716 129.72 0.816 0.249
12 1/4 76.04 0.4783 0.1468 1/2 36.61 0.2303 0.07
6 18.24 0.1147 0.035
Capacity of csg.size in " weight in lb/ft cap.in l/m cap.in bbl/m cap.in bbl/ft
9 5/8 53.5 36.92 0.232 0.0707769 5/8 47 38.19 0.24 0.07321
7 32 18.82 0.1184 0.0361
Capacity of DPsize in " weight in lb/ft grade metal displ. capacity total displ. dimension
3 1/2 15.5 S-135 3.19 3.41 6.6 l/m0.0201 0.02145 0.0415 bbl/m0.0061 0.00654 0.01265 bbl/ft
5 19.5 S-135 4.28 8.97 13.24 l/m0.02692 0.05642 0.08334 bbl/m
0.0082 0.00172 0.02538 bbl/ft
Capacity of HWDPsize in" weight in lb/ft metal displ. capacity total displ. dimension
3 1/2 25.33 4 4/5 2.19 7 l/m0.030254 0.013775 0.044029 bbl/m0.009221 0.004198 0.013419 bbl/ft
5 49.32 9 3/8 4.61 13.97 l/m0.0589 0.029 0.0879 bbl/m
0.01794 0.00884 0.0268 bbl/ft
Capacity of DCsize in" weight in lb/ft ID in" metal displ. capacity total displ. dimension
4 3/4 46.77 2 1/4 8.87 2.56 11.43 l/m0.0558 0.0161 0.0719 bbl/m
0.017004 0.004908 0.021911 bbl/ft4 3/4 39.15 2 13/16 7.422 4.008 11.43 l/m
0.0467 0.0252 0.0719 bbl/m0.0142 0.0077 0.021911 bbl/ft
6 1/4 90.85 2 1/4 17.23 2.56 19.79 l/m0.1084 0.0161 0.1245 bbl/m
0.033 0.005 0.038 bbl/ft6 1/2 91.79 2 4/5 17.4 4.01 21.41 l/m
0.1094 0.0252 0.135 bbl/m0.0334 0.0077 0.041 bbl/ft
8 149.92 2 4/5 28.42 4.01 32.43 l/m0.1788 0.0252 0.204 bbl/m0.0545 0.0077 0.0622 bbl/ft
36. oldal
Make up torque
For bitssize in" Threads in daNm in lbft5 1/8-7 3/8 3 1/2 REG 950-1200 7000-90007 1/2-9 3/8 4 1/2 REG 1600-2200 12000-160009 1/2-14 1/2 6 5/8 REG 3800-4300 28000-3200014 5/8-18 1/2 7 5/8 REG 4600-5400 34000-40000
18 5/8< 8 5/8 REG 5400-8100 40000-60000
For DP class I. tool joint
size in" weight in lb/ft grade thread in daNm in lbft3 1/2 15.5 S-135 3 1/2 IF 1764 13010
5 19.5 S-135 4 1/2 IF 3488 25700premium tool joint
3 1/2 15.5 S-135 3 1/2 IF 1557 114805 19.5 S-135 4 1/2 IF 3030 22350
For HWDPsize in" ID in" weight in lb/ft thread in daNm in lbft
3 1/2 2 1/16 25.33 3 1/2 IF 1342 99005 3 49.32 4 1/2 IF 3985 29400
For DCsize in" ID in" thread in daNm in lbft
4 3/4 1 3/4-2 1/2 3 1/2 IF 1342 99006 1/4 5 1/4 4 IF 3796 280006 1/4 10 1/2 4 IF 3457 255006 1/2 13 5/16 4 1/2 IF 4000 295006 1/2 2 1/4-3 4 1/2 IF 4000 29500
8 2 1/2 6 5/8 REG 7730 570008 2 13/16 6 5/8 REG 7190 530008 3 6 5/8 REG 6780 500009 3 7 5/8 REG 11250 830009 3 1/4 7 5/8 REG 11250 830009 3 1/2 7 5/8 REG 10710 790009 3 3/4 7 5/8 REG 10030 74000
Triplex pump cilinder & stroke output / pump stroke 12"=304,8mm /ID in mm ID in " efficiency in l in bbl in gal
140 5 1/2 100% 14.016 0.0882 3.703140 5 1/2 95% 13.32 0.0864 3.518150 5 29/32 100% 16.159 0.102 4.269150 5 29/32 95% 15.351 0.097 4.055160 6 5/16 100% 18.385 0.1156 4.8569160 6 5/16 95% 17.466 0.10986 4.6141
37. oldal
170 6 11/16 100% 20.7551 0.1305 5.483170 6 11/16 95% 19.717 0.124 5.21
38. oldal
Conversion table from ppg to kg/l & vica versaWritten by Gabor Nemeth
ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l8.01 0.960 8.54 1.023 9.07 1.087 9.6 1.150 10.13 1.2148.02 0.961 8.55 1.025 9.08 1.088 9.61 1.152 10.14 1.2158.03 0.962 8.56 1.026 9.09 1.089 9.62 1.153 10.15 1.2168.04 0.963 8.57 1.027 9.1 1.090 9.63 1.154 10.16 1.2178.05 0.965 8.58 1.028 9.11 1.092 9.64 1.155 10.17 1.2198.06 0.966 8.59 1.029 9.12 1.093 9.65 1.156 10.18 1.2208.07 0.967 8.6 1.031 9.13 1.094 9.66 1.158 10.19 1.2218.08 0.968 8.61 1.032 9.14 1.095 9.67 1.159 10.2 1.2228.09 0.969 8.62 1.033 9.15 1.096 9.68 1.160 10.21 1.2238.1 0.971 8.63 1.034 9.16 1.098 9.69 1.161 10.22 1.225
8.11 0.972 8.64 1.035 9.17 1.099 9.7 1.162 10.23 1.2268.12 0.973 8.65 1.037 9.18 1.100 9.71 1.164 10.24 1.2278.13 0.974 8.66 1.038 9.19 1.101 9.72 1.165 10.25 1.2288.14 0.975 8.67 1.039 9.2 1.102 9.73 1.166 10.26 1.2298.15 0.977 8.68 1.040 9.21 1.104 9.74 1.167 10.27 1.2318.16 0.978 8.69 1.041 9.22 1.105 9.75 1.168 10.28 1.2328.17 0.979 8.7 1.043 9.23 1.106 9.76 1.170 10.29 1.2338.18 0.980 8.71 1.044 9.24 1.107 9.77 1.171 10.3 1.2348.19 0.981 8.72 1.045 9.25 1.108 9.78 1.172 10.31 1.2358.2 0.983 8.73 1.046 9.26 1.110 9.79 1.173 10.32 1.237
8.21 0.984 8.74 1.047 9.27 1.111 9.8 1.174 10.33 1.2388.22 0.985 8.75 1.049 9.28 1.112 9.81 1.176 10.34 1.2398.23 0.986 8.76 1.050 9.29 1.113 9.82 1.177 10.35 1.2408.24 0.987 8.77 1.051 9.3 1.114 9.83 1.178 10.36 1.2418.25 0.989 8.78 1.052 9.31 1.116 9.84 1.179 10.37 1.2438.26 0.990 8.79 1.053 9.32 1.117 9.85 1.180 10.38 1.2448.27 0.991 8.8 1.054 9.33 1.118 9.86 1.182 10.39 1.2458.28 0.992 8.81 1.056 9.34 1.119 9.87 1.183 10.4 1.2468.29 0.993 8.82 1.057 9.35 1.120 9.88 1.184 10.41 1.2478.3 0.995 8.83 1.058 9.36 1.122 9.89 1.185 10.42 1.249
8.31 0.996 8.84 1.059 9.37 1.123 9.9 1.186 10.43 1.2508.32 0.997 8.85 1.060 9.38 1.124 9.91 1.188 10.44 1.2518.33 0.998 8.86 1.062 9.39 1.125 9.92 1.189 10.45 1.2528.34 0.999 8.87 1.063 9.4 1.126 9.93 1.190 10.46 1.2538.35 1.001 8.88 1.064 9.41 1.128 9.94 1.191 10.47 1.2558.36 1.002 8.89 1.065 9.42 1.129 9.95 1.192 10.48 1.2568.37 1.003 8.9 1.066 9.43 1.130 9.96 1.193 10.49 1.2578.38 1.004 8.91 1.068 9.44 1.131 9.97 1.195 10.5 1.2588.39 1.005 8.92 1.069 9.45 1.132 9.98 1.196 10.51 1.2598.4 1.007 8.93 1.070 9.46 1.134 9.99 1.197 10.52 1.261
8.41 1.008 8.94 1.071 9.47 1.135 10 1.198 10.53 1.2628.42 1.009 8.95 1.072 9.48 1.136 10.01 1.199 10.54 1.2638.43 1.010 8.96 1.074 9.49 1.137 10.02 1.201 10.55 1.2648.44 1.011 8.97 1.075 9.5 1.138 10.03 1.202 10.56 1.2658.45 1.013 8.98 1.076 9.51 1.140 10.04 1.203 10.57 1.2678.46 1.014 8.99 1.077 9.52 1.141 10.05 1.204 10.58 1.2688.47 1.015 9 1.078 9.53 1.142 10.06 1.205 10.59 1.2698.48 1.016 9.01 1.080 9.54 1.143 10.07 1.207 10.6 1.2708.49 1.017 9.02 1.081 9.55 1.144 10.08 1.208 10.61 1.2718.5 1.019 9.03 1.082 9.56 1.146 10.09 1.209 10.62 1.273
8.51 1.020 9.04 1.083 9.57 1.147 10.1 1.210 10.63 1.274
[emailprotected]
mailto:[emailprotected]
39. oldal
8.52 1.021 9.05 1.084 9.58 1.148 10.11 1.211 10.64 1.2758.53 1.022 9.06 1.086 9.59 1.149 10.12 1.213 10.65 1.276ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l
10.66 1.277 11.21 1.343 11.76 1.409 12.31 1.475 12.86 1.54110.67 1.279 11.22 1.344 11.77 1.410 12.32 1.476 12.87 1.54210.68 1.280 11.23 1.346 11.78 1.412 12.33 1.477 12.88 1.54310.69 1.281 11.24 1.347 11.79 1.413 12.34 1.479 12.89 1.54510.7 1.282 11.25 1.348 11.8 1.414 12.35 1.480 12.9 1.546
10.71 1.283 11.26 1.349 11.81 1.415 12.36 1.481 12.91 1.54710.72 1.285 11.27 1.350 11.82 1.416 12.37 1.482 12.92 1.54810.73 1.286 11.28 1.352 11.83 1.418 12.38 1.483 12.93 1.54910.74 1.287 11.29 1.353 11.84 1.419 12.39 1.485 12.94 1.55110.75 1.288 11.3 1.354 11.85 1.420 12.4 1.486 12.95 1.55210.76 1.289 11.31 1.355 11.86 1.421 12.41 1.487 12.96 1.55310.77 1.291 11.32 1.356 11.87 1.422 12.42 1.488 12.97 1.55410.78 1.292 11.33 1.358 11.88 1.424 12.43 1.489 12.98 1.55510.79 1.293 11.34 1.359 11.89 1.425 12.44 1.491 12.99 1.55710.8 1.294 11.35 1.360 11.9 1.426 12.45 1.492 13 1.558
10.81 1.295 11.36 1.361 11.91 1.427 12.46 1.493 13.01 1.55910.82 1.297 11.37 1.362 11.92 1.428 12.47 1.494 13.02 1.56010.83 1.298 11.38 1.364 11.93 1.430 12.48 1.495 13.03 1.56110.84 1.299 11.39 1.365 11.94 1.431 12.49 1.497 13.04 1.56310.85 1.300 11.4 1.366 11.95 1.432 12.5 1.498 13.05 1.56410.86 1.301 11.41 1.367 11.96 1.433 12.51 1.499 13.06 1.56510.87 1.303 11.42 1.368 11.97 1.434 12.52 1.500 13.07 1.56610.88 1.304 11.43 1.370 11.98 1.436 12.53 1.501 13.08 1.56710.89 1.305 11.44 1.371 11.99 1.437 12.54 1.503 13.09 1.56910.9 1.306 11.45 1.372 12 1.438 12.55 1.504 13.1 1.570
10.91 1.307 11.46 1.373 12.01 1.439 12.56 1.505 13.11 1.57110.92 1.309 11.47 1.374 12.02 1.440 12.57 1.506 13.12 1.57210.93 1.310 11.48 1.376 12.03 1.442 12.58 1.507 13.13 1.57310.94 1.311 11.49 1.377 12.04 1.443 12.59 1.509 13.14 1.57510.95 1.312 11.5 1.378 12.05 1.444 12.6 1.510 13.15 1.57610.96 1.313 11.51 1.379 12.06 1.445 12.61 1.511 13.16 1.57710.97 1.315 11.52 1.380 12.07 1.446 12.62 1.512 13.17 1.57810.98 1.316 11.53 1.382 12.08 1.448 12.63 1.513 13.18 1.57910.99 1.317 11.54 1.383 12.09 1.449 12.64 1.515 13.19 1.581
11 1.318 11.55 1.384 12.1 1.450 12.65 1.516 13.2 1.58211.01 1.319 11.56 1.385 12.11 1.451 12.66 1.517 13.21 1.58311.02 1.321 11.57 1.386 12.12 1.452 12.67 1.518 13.22 1.58411.03 1.322 11.58 1.388 12.13 1.454 12.68 1.519 13.23 1.58511.04 1.323 11.59 1.389 12.14 1.455 12.69 1.521 13.24 1.58711.05 1.324 11.6 1.390 12.15 1.456 12.7 1.522 13.25 1.58811.06 1.325 11.61 1.391 12.16 1.457 12.71 1.523 13.26 1.58911.07 1.327 11.62 1.392 12.17 1.458 12.72 1.524 13.27 1.59011.08 1.328 11.63 1.394 12.18 1.460 12.73 1.525 13.28 1.59111.09 1.329 11.64 1.395 12.19 1.461 12.74 1.527 13.29 1.59311.1 1.330 11.65 1.396 12.2 1.462 12.75 1.528 13.3 1.594
11.11 1.331 11.66 1.397 12.21 1.463 12.76 1.529 13.31 1.59511.12 1.332 11.67 1.398 12.22 1.464 12.77 1.530 13.32 1.59611.13 1.334 11.68 1.400 12.23 1.466 12.78 1.531 13.33 1.59711.14 1.335 11.69 1.401 12.24 1.467 12.79 1.533 13.34 1.59911.15 1.336 11.7 1.402 12.25 1.468 12.8 1.534 13.35 1.60011.16 1.337 11.71 1.403 12.26 1.469 12.81 1.535 13.36 1.601
40. oldal
11.17 1.338 11.72 1.404 12.27 1.470 12.82 1.536 13.37 1.60211.18 1.340 11.73 1.406 12.28 1.472 12.83 1.537 13.38 1.60311.19 1.341 11.74 1.407 12.29 1.473 12.84 1.539 13.39 1.60511.2 1.342 11.75 1.408 12.3 1.474 12.85 1.540 13.4 1.606ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l
13.41 1.607 13.96 1.673 14.51 1.739 15.06 1.805 15.61 1.87113.42 1.608 13.97 1.674 14.52 1.740 15.07 1.806 15.62 1.87213.43 1.609 13.98 1.675 14.53 1.741 15.08 1.807 15.63 1.87313.44 1.611 13.99 1.676 14.54 1.742 15.09 1.808 15.64 1.87413.45 1.612 14 1.678 14.55 1.744 15.1 1.809 15.65 1.87513.46 1.613 14.01 1.679 14.56 1.745 15.11 1.811 15.66 1.87713.47 1.614 14.02 1.680 14.57 1.746 15.12 1.812 15.67 1.87813.48 1.615 14.03 1.681 14.58 1.747 15.13 1.813 15.68 1.87913.49 1.616 14.04 1.682 14.59 1.748 15.14 1.814 15.69 1.88013.5 1.618 14.05 1.684 14.6 1.750 15.15 1.815 15.7 1.881
13.51 1.619 14.06 1.685 14.61 1.751 15.16 1.817 15.71 1.88313.52 1.620 14.07 1.686 14.62 1.752 15.17 1.818 15.72 1.88413.53 1.621 14.08 1.687 14.63 1.753 15.18 1.819 15.73 1.88513.54 1.622 14.09 1.688 14.64 1.754 15.19 1.820 15.74 1.88613.55 1.624 14.1 1.690 14.65 1.755 15.2 1.821 15.75 1.88713.56 1.625 14.11 1.691 14.66 1.757 15.21 1.823 15.76 1.88913.57 1.626 14.12 1.692 14.67 1.758 15.22 1.824 15.77 1.89013.58 1.627 14.13 1.693 14.68 1.759 15.23 1.825 15.78 1.89113.59 1.628 14.14 1.694 14.69 1.760 15.24 1.826 15.79 1.89213.6 1.630 14.15 1.696 14.7 1.761 15.25 1.827 15.8 1.893
13.61 1.631 14.16 1.697 14.71 1.763 15.26 1.829 15.81 1.89413.62 1.632 14.17 1.698 14.72 1.764 15.27 1.830 15.82 1.89613.63 1.633 14.18 1.699 14.73 1.765 15.28 1.831 15.83 1.89713.64 1.634 14.19 1.700 14.74 1.766 15.29 1.832 15.84 1.89813.65 1.636 14.2 1.702 14.75 1.767 15.3 1.833 15.85 1.89913.66 1.637 14.21 1.703 14.76 1.769 15.31 1.835 15.86 1.90013.67 1.638 14.22 1.704 14.77 1.770 15.32 1.836 15.87 1.90213.68 1.639 14.23 1.705 14.78 1.771 15.33 1.837 15.88 1.90313.69 1.640 14.24 1.706 14.79 1.772 15.34 1.838 15.89 1.90413.7 1.642 14.25 1.708 14.8 1.773 15.35 1.839 15.9 1.905
13.71 1.643 14.26 1.709 14.81 1.775 15.36 1.841 15.91 1.90613.72 1.644 14.27 1.710 14.82 1.776 15.37 1.842 15.92 1.90813.73 1.645 14.28 1.711 14.83 1.777 15.38 1.843 15.93 1.90913.74 1.646 14.29 1.712 14.84 1.778 15.39 1.844 15.94 1.91013.75 1.648 14.3 1.714 14.85 1.779 15.4 1.845 15.95 1.91113.76 1.649 14.31 1.715 14.86 1.781 15.41 1.847 15.96 1.91213.77 1.650 14.32 1.716 14.87 1.782 15.42 1.848 15.97 1.91413.78 1.651 14.33 1.717 14.88 1.783 15.43 1.849 15.98 1.91513.79 1.652 14.34 1.718 14.89 1.784 15.44 1.850 15.99 1.91613.8 1.654 14.35 1.720 14.9 1.785 15.45 1.851 16 1.917
13.81 1.655 14.36 1.721 14.91 1.787 15.46 1.853 16.01 1.91813.82 1.656 14.37 1.722 14.92 1.788 15.47 1.854 16.02 1.92013.83 1.657 14.38 1.723 14.93 1.789 15.48 1.855 16.03 1.92113.84 1.658 14.39 1.724 14.94 1.790 15.49 1.856 16.04 1.92213.85 1.660 14.4 1.726 14.95 1.791 15.5 1.857 16.05 1.92313.86 1.661 14.41 1.727 14.96 1.793 15.51 1.859 16.06 1.92413.87 1.662 14.42 1.728 14.97 1.794 15.52 1.860 16.07 1.92613.88 1.663 14.43 1.729 14.98 1.795 15.53 1.861 16.08 1.92713.89 1.664 14.44 1.730 14.99 1.796 15.54 1.862 16.09 1.928
41. oldal
13.9 1.666 14.45 1.732 15 1.797 15.55 1.863 16.1 1.92913.91 1.667 14.46 1.733 15.01 1.799 15.56 1.865 16.11 1.93013.92 1.668 14.47 1.734 15.02 1.800 15.57 1.866 16.12 1.93213.93 1.669 14.48 1.735 15.03 1.801 15.58 1.867 16.13 1.93313.94 1.670 14.49 1.736 15.04 1.802 15.59 1.868 16.14 1.93413.95 1.672 14.5 1.738 15.05 1.803 15.6 1.869 16.15 1.935ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l
16.16 1.936 16.71 2.002 17.26 2.068 17.81 2.134 18.36 2.20016.17 1.938 16.72 2.004 17.27 2.069 17.82 2.135 18.37 2.20116.18 1.939 16.73 2.005 17.28 2.071 17.83 2.137 18.38 2.20216.19 1.940 16.74 2.006 17.29 2.072 17.84 2.138 18.39 2.20416.2 1.941 16.75 2.007 17.3 2.073 17.85 2.139 18.4 2.205
16.21 1.942 16.76 2.008 17.31 2.074 17.86 2.140 18.41 2.20616.22 1.944 16.77 2.010 17.32 2.075 17.87 2.141 18.42 2.20716.23 1.945 16.78 2.011 17.33 2.077 17.88 2.143 18.43 2.20816.24 1.946 16.79 2.012 17.34 2.078 17.89 2.144 18.44 2.21016.25 1.947 16.8 2.013 17.35 2.079 17.9 2.145 18.45 2.21116.26 1.948 16.81 2.014 17.36 2.080 17.91 2.146 18.46 2.21216.27 1.950 16.82 2.016 17.37 2.081 17.92 2.147 18.47 2.21316.28 1.951 16.83 2.017 17.38 2.083 17.93 2.149 18.48 2.21416.29 1.952 16.84 2.018 17.39 2.084 17.94 2.150 18.49 2.21616.3 1.953 16.85 2.019 17.4 2.085 17.95 2.151 18.5 2.217
16.31 1.954 16.86 2.020 17.41 2.086 17.96 2.152 18.51 2.21816.32 1.956 16.87 2.022 17.42 2.087 17.97 2.153 18.52 2.21916.33 1.957 16.88 2.023 17.43 2.089 17.98 2.155 18.53 2.22016.34 1.958 16.89 2.024 17.44 2.090 17.99 2.156 18.54 2.22216.35 1.959 16.9 2.025 17.45 2.091 18 2.157 18.55 2.22316.36 1.960 16.91 2.026 17.46 2.092 18.01 2.158 18.56 2.22416.37 1.962 16.92 2.028 17.47 2.093 18.02 2.159 18.57 2.22516.38 1.963 16.93 2.029 17.48 2.095 18.03 2.161 18.58 2.22616.39 1.964 16.94 2.030 17.49 2.096 18.04 2.162 18.59 2.22816.4 1.965 16.95 2.031 17.5 2.097 18.05 2.163 18.6 2.229
16.41 1.966 16.96 2.032 17.51 2.098 18.06 2.164 18.61 2.23016.42 1.968 16.97 2.033 17.52 2.099 18.07 2.165 18.62 2.23116.43 1.969 16.98 2.035 17.53 2.101 18.08 2.167 18.63 2.23216.44 1.970 16.99 2.036 17.54 2.102 18.09 2.168 18.64 2.23416.45 1.971 17 2.037 17.55 2.103 18.1 2.169 18.65 2.23516.46 1.972 17.01 2.038 17.56 2.104 18.11 2.170 18.66 2.23616.47 1.974 17.02 2.039 17.57 2.105 18.12 2.171 18.67 2.23716.48 1.975 17.03 2.041 17.58 2.107 18.13 2.172 18.68 2.23816.49 1.976 17.04 2.042 17.59 2.108 18.14 2.174 18.69 2.24016.5 1.977 17.05 2.043 17.6 2.109 18.15 2.175 18.7 2.241
16.51 1.978 17.06 2.044 17.61 2.110 18.16 2.176 18.71 2.24216.52 1.980 17.07 2.045 17.62 2.111 18.17 2.177 18.72 2.24316.53 1.981 17.08 2.047 17.63 2.113 18.18 2.178 18.73 2.24416.54 1.982 17.09 2.048 17.64 2.114 18.19 2.180 18.74 2.24616.55 1.983 17.1 2.049 17.65 2.115 18.2 2.181 18.75 2.24716.56 1.984 17.11 2.050 17.66 2.116 18.21 2.182 18.76 2.24816.57 1.986 17.12 2.051 17.67 2.117 18.22 2.183 18.77 2.24916.58 1.987 17.13 2.053 17.68 2.119 18.23 2.184 18.78 2.25016.59 1.988 17.14 2.054 17.69 2.120 18.24 2.186 18.79 2.25216.6 1.989 17.15 2.055 17.7 2.121 18.25 2.187 18.8 2.253
16.61 1.990 17.16 2.056 17.71 2.122 18.26 2.188 18.81 2.25416.62 1.992 17.17 2.057 17.72 2.123 18.27 2.189 18.82 2.255
42. oldal
16.63 1.993 17.18 2.059 17.73 2.125 18.28 2.190 18.83 2.25616.64 1.994 17.19 2.060 17.74 2.126 18.29 2.192 18.84 2.25816.65 1.995 17.2 2.061 17.75 2.127 18.3 2.193 18.85 2.25916.66 1.996 17.21 2.062 17.76 2.128 18.31 2.194 18.86 2.26016.67 1.998 17.22 2.063 17.77 2.129 18.32 2.195 18.87 2.26116.68 1.999 17.23 2.065 17.78 2.131 18.33 2.196 18.88 2.26216.69 2.000 17.24 2.066 17.79 2.132 18.34 2.198 18.89 2.26416.7 2.001 17.25 2.067 17.8 2.133 18.35 2.199 18.9 2.265ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l
18.91 2.266 19.46 2.332 20.01 2.398 20.56 2.464 21.11 2.53018.92 2.267 19.47 2.333 20.02 2.399 20.57 2.465 21.12 2.53118.93 2.268 19.48 2.334 20.03 2.400 20.58 2.466 21.13 2.53218.94 2.270 19.49 2.335 20.04 2.401 20.59 2.467 21.14 2.53318.95 2.271 19.5 2.337 20.05 2.403 20.6 2.468 21.15 2.53418.96 2.272 19.51 2.338 20.06 2.404 20.61 2.470 21.16 2.53618.97 2.273 19.52 2.339 20.07 2.405 20.62 2.471 21.17 2.53718.98 2.274 19.53 2.340 20.08 2.406 20.63 2.472 21.18 2.53818.99 2.276 19.54 2.341 20.09 2.407 20.64 2.473 21.19 2.539
19 2.277 19.55 2.343 20.1 2.409 20.65 2.474 21.2 2.54019.01 2.278 19.56 2.344 20.11 2.410 20.66 2.476 21.21 2.54219.02 2.279 19.57 2.345 20.12 2.411 20.67 2.477 21.22 2.54319.03 2.280 19.58 2.346 20.13 2.412 20.68 2.478 21.23 2.54419.04 2.282 19.59 2.347 20.14 2.413 20.69 2.479 21.24 2.54519.05 2.283 19.6 2.349 20.15 2.415 20.7 2.480 21.25 2.54619.06 2.284 19.61 2.350 20.16 2.416 20.71 2.482 21.26 2.54819.07 2.285 19.62 2.351 20.17 2.417 20.72 2.483 21.27 2.54919.08 2.286 19.63 2.352 20.18 2.418 20.73 2.484 21.28 2.55019.09 2.288 19.64 2.353 20.19 2.419 20.74 2.485 21.29 2.55119.1 2.289 19.65 2.355 20.2 2.421 20.75 2.486 21.3 2.552
19.11 2.290 19.66 2.356 20.21 2.422 20.76 2.488 21.31 2.55419.12 2.291 19.67 2.357 20.22 2.423 20.77 2.489 21.32 2.55519.13 2.292 19.68 2.358 20.23 2.424 20.78 2.490 21.33 2.55619.14 2.294 19.69 2.359 20.24 2.425 20.79 2.491 21.34 2.55719.15 2.295 19.7 2.361 20.25 2.427 20.8 2.492 21.35 2.55819.16 2.296 19.71 2.362 20.26 2.428 20.81 2.494 21.36 2.56019.17 2.297 19.72 2.363 20.27 2.429 20.82 2.495 21.37 2.56119.18 2.298 19.73 2.364 20.28 2.430 20.83 2.496 21.38 2.56219.19 2.300 19.74 2.365 20.29 2.431 20.84 2.497 21.39 2.56319.2 2.301 19.75 2.367 20.3 2.433 20.85 2.498 21.4 2.564
19.21 2.302 19.76 2.368 20.31 2.434 20.86 2.500 21.41 2.56619.22 2.303 19.77 2.369 20.32 2.435 20.87 2.501 21.42 2.56719.23 2.304 19.78 2.370 20.33 2.436 20.88 2.502 21.43 2.56819.24 2.306 19.79 2.371 20.34 2.437 20.89 2.503 21.44 2.56919.25 2.307 19.8 2.373 20.35 2.439 20.9 2.504 21.45 2.57019.26 2.308 19.81 2.374 20.36 2.440 20.91 2.506 21.46 2.57219.27 2.309 19.82 2.375 20.37 2.441 20.92 2.507 21.47 2.57319.28 2.310 19.83 2.376 20.38 2.442 20.93 2.508 21.48 2.57419.29 2.312 19.84 2.377 20.39 2.443 20.94 2.509 21.49 2.57519.3 2.313 19.85 2.379 20.4 2.445 20.95 2.510 21.5 2.576
19.31 2.314 19.86 2.380 20.41 2.446 20.96 2.512 21.51 2.57819.32 2.315 19.87 2.381 20.42 2.447 20.97 2.513 21.52 2.57919.33 2.316 19.88 2.382 20.43 2.448 20.98 2.514 21.53 2.58019.34 2.317 19.89 2.383 20.44 2.449 20.99 2.515 21.54 2.58119.35 2.319 19.9 2.385 20.45 2.451 21 2.516 21.55 2.582
43. oldal
19.36 2.320 19.91 2.386 20.46 2.452 21.01 2.518 21.56 2.58419.37 2.321 19.92 2.387 20.47 2.453 21.02 2.519 21.57 2.58519.38 2.322 19.93 2.388 20.48 2.454 21.03 2.520 21.58 2.58619.39 2.323 19.94 2.389 20.49 2.455 21.04 2.521 21.59 2.58719.4 2.325 19.95 2.391 20.5 2.456 21.05 2.522 21.6 2.588
19.41 2.326 19.96 2.392 20.51 2.458 21.06 2.524 21.61 2.59019.42 2.327 19.97 2.393 20.52 2.459 21.07 2.525 21.62 2.59119.43 2.328 19.98 2.394 20.53 2.460 21.08 2.526 21.63 2.59219.44 2.329 19.99 2.395 20.54 2.461 21.09 2.527 21.64 2.59319.45 2.331 20 2.397 20.55 2.462 21.1 2.528 21.65 2.594
Trip calculationsWritten by Gabor Nemeth
Data Metric Unit Field Unit
0.00428 l/m 0.008205 bbl/ftPcap-Pipe capacity 0.00897 l/m 0.017195 bbl/ft
0.01325 l/m 0.0254 bbl/ft28.7 m 94.16 ft
0.02367 l/m 0.045375 bbl/ftOMW-Original mud weight 1490 12.43 ppg
SMW-Slug mud weight 1680 14.02 ppg
8 50.32 bbl113.73 m 373.17 ft
1. Fluid level drop (FLD) :
a; In dry POOHFLD= (Pipe displ. x length of stand)/(csg-pipe annular cap.+pipe cap.)
3.76 m/std 12.35 ft/std b; In wet POOHFLD= (Pipe total displ. x length of stand)/(csg-pipe ann. cap.+pipe total cap)
10.30 m/std 33.79 ft/std
a; In dry POOHOMW x g x FLD 55 kPa/std 7.98 psi/std
b; In wet POOHOMW x g x FLD 151 kPa/std 21.85 psi/std
3. Slug :
113.73 m 373.17 ft
1680.00 14.02 ppg
[emailprotected]
Pmd-Pipe metal displacement
Pt-Pipe total displacementLstd- Average length of standPac-Csg-pipe annular capacity
kg/m3
kg/m3
Vs-Volume of slug m3
Lsc-a certain level of mud in the pipe
Fill in ONLY the section above with data and the program will calculate by itself !!!
2. Hydrostatic pressure loss (Ploss) :
Ploss=
Ploss=
a; Level of mud in the pipe after slug (Ls) :
Ls= ((SMW-OMW) x (Vs/Pcap))/OMW
b; Slug mud weight based on a certain level of mud in the pipe (SMW1) :
SMW1= OMW+((Lsc x OMW)/(Vs/Pcap)) kg/m3
mailto:[emailprotected]
HYDRAULICSWritten by Gabor Nemeth
Data Metric Unit Field Unit
TVD-True vertical depth 2233 m 7326.12 ft
OMW-Original mud weight 1150 9.60 ppg
d-specific gravity 1.15 kg/l 1.2 kg/l9 5/8 in 9 5/8 in3 1/2 in 3 1/2 in2233 m 7326.12 ft
4 cp 4 cp2 cp 2 cp1 1
SPM-stroke per minute 150 str/min 150 str/minL-length of stroke 6 in 6 inD-liner diameter 4 1/2 in 4 1/2 in
0 in 0 in633.00 l/min 167.23 gpm
33.1 l/m 0.06345 bbl/ft
a; Duplex pump: l/min
0,000162 x SPM x L x ((2 x D^2)-dp^2) (field) gpm
b; Single-acting Triplex pump:703.49 l/min
186.00 gpm
90% 90%
18.82 m/min61.76 ft/min
V-Fluid velocity 19.12 m/min 62.75 ft/min
Type of flow : turbulent turbulent
If V<Vc, the flow is laminar; if V>Vc, the flow is turbulent !
4. Annular Pressure Loss (APL) :
30 kPaTurbulent flow: 19 kPa
5.59 psi
5. Equivalent circulating density (ECD) :
ECD=(metric.) OMW+((APL x 1000)/(9,81xTVD)) (metric) 1151
ECD=(field.) OMW+(APL/(0,052*TVD)) (field.) 9.61 ppg
6. Trip margin (TM) :
1.67
[emailprotected]
kg/m3
Do-Annulus outside diameter Di-Annulus inside diameter/outside string/ Lp-length of stringm-Dynamic viscositymp-plastic viscosity to-Yield value lb/100ft2 lb/100ft2
dp-piston rod diameterQr-True measured flow ratevas-Annular capacity
Fill in ONLY the section above with data and the program will calculate by itself !!!
1. Theoretical flow rate (Qt) :
Qt=(metric.) 0,0515 x SPM x L x (D^2-dp^2/2) (metric)Qt=(field.)
Qt=(metric.) Qt= 0,0386 x SPM x L x D^2 (metric)Qt=(field.) Qt=0,000243 x SPM x D^2 x L (field)
2. Volumetric efficiency (hv) :
hv=(duplex pump) hv=Qr/Qt (duplex pump)
hv=(triplex pump) hv=Qr/Qt (triplex pump)
3. Critical fluid velocity in the annulus (Vc) :
Vc=(metric.) (3,04/((Do-Di)xd))x(mp+(root2 mp^2+40,05xto x (Do-Di)^2 x d)) (metric)
Vc=(field.) (9,974/((Do-Di)xd))x(mp+(root2 mp^2+40,05xto x (Do-Di)^2 x d)) (field)
Laminar flow: APL=(QAPL=((Qr*Lp*mp)/(408,63*(Do+Di)*(Do-Di)^3))+((to*Lp)/(13,26*(Do-Di)))
APL=(Lp*d^0,8*Qr^1,8*mp^0,2)/(706,96*(Do+Di)^1,8*(Do-Di)^3)
APL=(field.) ((Lp*to)/225*(Do-Di))+(((Lp*mp*(V/60))/1500*(Do-Di)^2)
kg/m3
TM=(metr.) to x 10,2418/(Do-Di)(metr.) kg/m3
mailto:[emailprotected]
TM=(field.) 0.01 ppgto/(11,7x(Do-Di)) (field.)
Written by Gabor Nemeth
Fill
in O
NL
Y t
his
se
cti
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wit
h d
ata
L1=the deepest depth of the operation in meter 3600 mL2=the beginning of the operation in meter 3580 ml =length of a stand in meter 28.6 m
260 m100 m
0 mReal weight of bit, stabilizer, drilling jar, pony DC, etc. in kg 1300 kgDC 1 real weight in kg/m 242 kg/mDC 2 real weight in kg/m 214.8 kg/mHWDP real weight in kg/m 73.4 kg/mDP 1 real weight (or tbg., or csg.) in kg/m 29.02 kg/m
1900 mDP 2 real weight (or tbg., or csg.) in kg/m 23.1 kg/m
1320 mMud density in kg/l 1.49 kg/lP=total weight of travelling block-elevator assembly in kg 8000 kgp=weight of DP with tool joints(accounting for buoyancy) in kg/m 21.53 kg/md=additional weight due to BHA(DC,HWDP,bit etc.)(accounting for buoyancy) kg 69433 kgBUOYANCY FACTOR k=1-(Mud density/Steel density) 0.810
DC 1 apparent weight = DC 1 real weight-Buoyancy DC 1 196.07 kg/mDC 2 apparent weight = DC 2 real weight-Buoyancy DC 2 174.03 kg/mHWDP apparent weight = HWDP real weight-Buoyancy HWDP 59.47 kg/mDP 1 apparent weight = DP 1 real weight-Buoyancy DP 1 23.51 kg/mDP 2 apparent weight = DP 2 real weight-Buoyancy DP 2 18.69 kg/mBit, stabilizer, drilling jar, pony DC, etc. apparent weight 1053.25 kgBuoyancy DC 1 = (DC 1 real weight*Mud density)/Steel density 45.93 kg/mBuoyancy DC 2 = (DC 2 real weight*Mud density)/Steel density 40.77 kg/mBuoyancy HWDP= HWDP real weight*Mud density/Steel density 13.93 kg/mBuoyancy DP 1 = (DP 1 real weight*Mud density)/Steel density 5.51 kg/mBuoyancy DP 2 = (DP 2 real weight*Mud density)/Steel density 4.38 kg/m
H E N C E :Apparent weight = Real weight x ((Steel density - Mud density) / Steel density)
Type of operation: pooh Tm=(0,981*(p*L*(L+l)+4*L897 890
1. Round trip tons km
2. POOH 448 tons km
3. RIH tons km
4. Short trip tons km
5. Drilling 1 tons km
6. Drilling 2 tons km
7. Reaming tons km
8. Coring tons km
9. Running casing tons km
N O T E :S t e e l d e n s i t y : 7.85
WORK DONE BY A DRILLING LINE /metric units/[emailprotected]
LDC 1=length of DC 1 in meterLDC 2=length of DC 2 in meterLHWDP=length of HWDP in meter
LDP 1=length of DP 1 in meter
LDP 2=length of DP 2 in meter
Tm1 Tm2
kg/dm3
mailto:[emailprotected]
D36
Write the type of operation into this cell, from the follows: -Round trip -POOH -RIH -Short trip -Drilling 1 /to depth L1 / -Drilling 2 /from depth L2 to depth L1/ -Reaming -Coring -Running casing /take the note into consideration/; and the program will caculate by itself
B55
In this case: l = average length of csg /m/ p = average weight of csg /kg/m/(accounting for buoyance) d ="0"
Fill
in O
NL
Y t
his
se
cti
on
wit
h d
ata
11811 ft11745 ft
L =length of a stand in feet 93.83 ft853 ft328 ft
0 ftReal weight of bit, stabilizer, drilling jar, pony DC, etc. in lbs 2866 lbsLength of bit, stabilizer, drilling jar, pony DC, etc. in feet 10 ftDC 1 real weight in lb/ft 162.89 lb/ftDC 2 real weight in lb/ft 144.34 lb/ftHWDP real weight in lb/ft 49.32 lb/ftDP 1 real weight (or tbg., or csg.) in lb/ft 19.5 lb/ft
6234 ftDP 2 real weight (or tbg., or csg.) in lb/ft 15.5 lb/ft
4320 ftMud density in ppg 12.43 ppgM=total weight of travelling block-elevator assembly in lbs 17637 lbsW = Bouyed weight of drill pipe in lb/ft 14.47 lb/ft
156935 lbsBUOYANCY FACTOR k=1-(Mud density/Steel density) 0.810
DC 1 apparent weight = DC 1 real weight-Buoyancy DC 1 131.98 lb/ftDC 2 apparent weight = DC 2 real weight-Buoyancy DC 2 116.95 lb/ftHWDP apparent weight = HWDP real weight-Buoyancy HWDP 39.96 lb/ftDP 1 apparent weight = DP 1 real weight-Buoyancy DP 1 15.80 lb/ftDP 2 apparent weight = DP 2 real weight-Buoyancy DP 2 12.56 lb/ftBit, stabilizer, drilling jar, pony DC, etc. apparent weight 2322.20 lbsBuoyancy DC 1 = (DC 1 real weight*Mud density)/Steel density 30.91 lb/ftBuoyancy DC 2 = (DC 2 real weight*Mud density)/Steel density 27.39 lb/ftBuoyancy HWDP= HWDP real weight*Mud density/Steel density 9.36 lb/ftBuoyancy DP 1 = (DP 1 real weight*Mud density)/Steel density 3.70 lb/ftBuoyancy DP 2 = (DP 2 real weight*Mud density)/Steel density 2.94 lb/ft
H E N C E :Apparent weight = Real weight x ((Steel density - Mud density) / Steel density)
Type of operation: pooh TM=((D*(L+D)*W/1056000623 618
1. Round trip tonmiles
2. POOH 311 tonmiles
3. RIH tonmiles
4. Short trip tonmiles
5. Drilling 1 tonmiles
6. Drilling 2 tonmiles
7. Reaming tonmiles
8. Coring tonmiles
9. Running casing tonmiles
N O T E :
S t e e l d e n s i t y : 65.51 ppg
WORK DONE BY A DRILLING LINE /field units/D1=the deepest depth of the operation in feetD2=the beginning of the operation in feet
LDC 1=length of DC in feetLDC 2=length of DC in feetLHWDP=length of HWDP in feet
LDP 1=length of DP 1 in feet
LDP 2=length of DP 2 in feet
C = Bouyed weight of BHA minus bouyed weight of equal length DP in lbs
Tm1 Tm2
D94
Write the type of operation into this cell, from the follows: -Round trip -POOH -RIH -Short trip -Drilling 1 /to depth L1 / -Drilling 2 /from depth L2 to depth L1/ -Reaming -Coring -Running casing /take the note into consideration/; and the program will caculate by itself
B113
In this case: L = average length of csg /ft/ W = average weight of csg /lb/ft/(accounting for buoyance) C ="0"
PROCEDURE FOR SLIP & CUT DRILLING LINE PROGRAMME
INTRODUCTION
This procedure has issued as a guidline for slip and cut drilling line programme
RIG BASIC DATA
Mast Drilling Line Drawworks Drum
Capacity Height tons Type Breaking load Type Cap. Type OD "
14 mlbs 142 ft 500
in tons14 Plain Grooved 30
75.7
1.09 3.34173CUT OFF LENGTH IN NUMBER OF DRUM LAPS FOR DRILLING LINE ( as per API RP 9B )
X laps + 1/2 lap for counterbalanced grooved drum = 11 1/2 laps
Conversion of laps to length is
90.32 ft 27.53 m
Fast line tension = Hook load/(Number of line x Reeving efficiency) 64.22 tons
Safety factor ( S.F. ) is equal S.F. = Breaking load / Fast line tension 1.18
Ton- Miles per foot cut when operating at safety factor 5 is 20, for full cut - off length
20 * 90,32' = 1806 ton-miles
This is a good drilling practice to slip three times between cut - off.
THE GOOD PROCEDURE IS
Hook load No. of
line
Type of
bear- rings
1 3/8 6 x 19 IPS, IWRC
Midco U914
1400 HP
p * OD/12 * No.of drum laps
ta= F/(N x hm)
Reeving efficiency (hm)=(Friction factor/depending on type of bearrings/ to the number of line th power) - 1
Number of line x (Friction factor -1) x (Friction factor to the number of line th power)
Slip drilling line 9 m after every 602 ton - miles / 862 Tkm /
Cut - off drilling line 27 m after every 1806 ton - miles / 2586 Tkm /
K15
Write here: either -Plain or -Roller depending on the type of bearrings
I21
Read the data from the Drilling Data Handbook page 271 chart
Rig No. Drilling line work report Units : Tons, meters, Tkm
FILL ONLY THE WHITE COLUMNS
DATE RIG ACTOIN FROM TO
10/02/00 Drilling 0 50 8 8 8 8 1100 111/02/00 Round trip 50 0 8 16 16 16 1100
15 31 31 31 110060 91 91 91 110055 146 146 146 1100
450 0 596 596 slip 9 1100310 310 906 906 1100
9 0 0 915 cut 27 107318 18 18 933 107356 74 74 989 1073
156 230 230 1145 1073230 460 460 1375 1073
18 478 478 1393 107327 0 505 1420 slip 9 1073
400 400 905 1820 1073200 0 1105 2020 slip 9 1073
8 8 1113 2028 107312 20 1125 2040 1073
9 29 1134 2049 107365 94 1199 2114 107356 150 1255 2170 107398 248 1353 2268 107379 327 1432 2347 1073
222 0 0 2569 cut 27 1046200 200 200 2769 1046
26 226 226 2795 104664 290 290 2859 104679 369 369 2938 1046
120 489 489 3058 1046300 0 789 3358 slip 9 1046
8 8 797 3366 10468 16 805 3374 1046
16 32 821 3390 104669 101 890 3459 1046
150 251 1040 3609 10468 259 1048 3617 1046
45 304 1093 3662 104612 316 1105 3674 1046
200 0 1305 3874 slip 9 104616 16 1321 3890 1046
150 166 1471 4040 104635 201 1506 4075 104680 281 1586 4155 104645 326 1631 4200 1046
150 0 0 4350 cut 27 10198 8 8 4358 1019
16 24 24 4374 1019
TKM ACT.
FROM SLIP
FROM CUT
TKM CUMMUL.
CUT, SLIP
C O. S LENGT
H
PRESENT LENGTH
BHA NUMBER
16 40 40 4390 101930 70 70 4420 101915 85 85 4435 101950 135 135 4485 1019
8 143 143 4493 1019
Determination of the length of free pipe in a stuck stringWritten by Gabor Nemeth
Data Metric Unit Field Unit25.05 kg/m 16.83 lb/ft31.83 kg/m 21.39 lb/ft
HWDP real weight 73.4 kg/m 49.32 lb/ft149.8 kg/m 100.66 lb/ft123.9 kg/m 83.26 lb/ft1000 m 3281 ft1500 m 4921 ft
HWDP length 300 m 984 ft150 m 492 ft100 m 328 ft
Mud density 1.4 kg/l 11.68 ppg141.2 317430 lbs
Distance between the two datum lines / l / 300 mm 11 4/5 inches
Procedures
1. Calculate the maximum pull on drill pipe.2. Calculate the weight of the drill string in mud.3. Calculate the allowable pull margin.
should be approximately the weight of drill string in mud + 30 % of the pull margin. Draw a mark at the kelly-bushing level. Pull on approximately 2-6 tons / 4400-13200 lbs/ more than before and return to the previous weight. Draw a second mark at the kelly- bushing level. This second mark should be distinct from the first caused by friction of drill pipe in the hole. Draw a datum line midway between these two marks.
drill string in mud + 65 % of the pull margin. Draw a mark at the kelly-bushing level.
the previous weight. Draw a second mark as before and draw a datum line midway between these two marks.6. Measure the distance / l / in mm or inches between the two datum lines.7. Calculate the length of free pipe.
Calculation of max. pull on drill pipe 130 tons 285687 lbs
Calculation of weight of drill string in mud 107 tons 234880 lbs
Calculation of the allowable pull margin 23 tons 50807 lbs
113 tons 250122 lbs
122 tons 267905 lbs
Calculation of the length of free pipe 2538 m 8337 ft
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DP1 real weight /including tool joint/DP2 real weight /including tool joint/
DC1 real weightDC2 real weightDP1 lengthDP2 length
DC1 lengthDC2 length
DP1 tensile yield strength 103daN
Fill in ONLY the section above with data and the program will calculate by itself !!!
4. Pull on the drill string until the weight indicator shows a pull T1 of some tons. This
5. Proceed as above by applying T2 pull on. This should be approximately the weight of
Pull on again approximately 2-6 tons / 4400-13200 lbs /more than before, and return to
Calculation of T1 pull
Calculation of T2 pull
DC
2D
C1
HW
DP
DP
1D
P2
Bit
mailto:[emailprotected]
A16
Read it on the rigfloor & write into the cell close by.
Back-offWritten by Gabor Nemeth
Data Metric Unit Field Unit25.05 kg/m 16.83 lb/ft31.83 kg/m 21.39 lb/ft
HWDP real weight 73.4 kg/m 49.32 lb/ft149.8 kg/m 100.66 lb/ft123.9 kg/m 83.26 lb/ft
Weight of travelling block, hook etc. 8 tons 17637 lbs1000 m 3281 ft1500 m 4921 ft
HWDP length 300 m 984 ft150 m 492 ft100 m 328 ft
Mud density 1.4 kg/l 11.68 ppgDepth of stuck point 3384 m 11117 ftDepth of back-off 2500 m 8202 ftTool joint matting surface area 21.93 3.4
141.2 317430 lbsMax torsional limit for 1000 m DP 12 1/2 turns/1000 m 12 1/2 turns/3281 ft
Procedures
1. Before any back-off, determine the depth of stuck point. Decide the depth of back-off.2. Make up the drill string to 80% of the torsional limit of the drill pipe in tension ( weight of drill string in mud ). Read the torsional limit in the "Drilling Data Handbook" K21-K24 chart, and multiply by the back-off depth/1000 m ( back-off depth/3280,84 ft ). Make-up the drill string to the right.3. Set the neutral point at the depth of back-off. The weight indicator should show the cal- culated tension.4. Apply leftward twist amounting to 80% of the rightward twist used to make-up the string.
Calculation of weight of drill string in mud 107 tons 234880 lbs
80% of max. torsional limit at back-off depth in tension 25 right turns 25 right turns
Hydrostatic pressure at the depth of back-off 34335 kPa 4982 psi
Weight in mud of free length of drill pipe + block 68 tons 149504 lbs
Weight indicator tension at neutral point 75 tons 166446 lbs
80% of rightward turns for applying leftward twist 20 left turns 20 left turns
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DP1 real weight /including tool joint/DP2 real weight /including tool joint/
DC1 real weightDC2 real weight
DP1 lengthDP2 length
DC1 lengthDC2 length
cm2 in2
DP1 torsional strength 103daN
Fill in ONLY the section above with data and the program will calculate by itself !!!
DC
2D
C1
HW
DP
DP
1D
P2
Bit
mailto:[emailprotected]
D21
See it in "Drilling Data Handbook" K21-K24 chart. Do not forget, tension = weight of drill string in mud !