Surface stack kick sheet - Audit

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Kick Control worksheet, release 1a, issued 20 Oct 08. Audit version.

Sponsored and approved by Aberdeen Drilling Schools – the home of well control training

Pre-kick input – well information

Pre-kick input – string and mud data

 

4.5″  9.5 ppf4.5″  10.5 ppf4.5″  11.6 ppf4.5″  13.5 ppf4.5″  15.1 ppf5″  11.5 ppf5″  13 ppf5″  15 ppf5″  18 ppf5″  21.4 ppf5″  23.2 ppf5″  24.1 ppf5.5″  14 ppf5.5″  15.5 ppf5.5″  17 ppf5.5″  20 ppf5.5″  23 ppf5.5″  26.8 ppf5.5″  29.7 ppf5.5″  32.6 ppf5.5″  35.3 ppf5.5″  38 ppf5.5″  40.5 ppf5.5″  43.1 ppf6.625″  20 ppf6.625″  24 ppf6.625″  28 ppf6.625″  32 ppf7″  17 ppf7″  20 ppf7″  23 ppf7″  26 ppf7″  29 ppf7″  32 ppf7″  35 ppf7″  38 ppf7″  42.7 ppf7″  46.4 ppf7″  50.1 ppf7″  53.6 ppf7″  57.1 ppf7.625″  24 ppf7.625″  26.4 ppf7.625″  29.7 ppf7.625″  33.7 ppf7.625″  39 ppf7.625″  42.8 ppf7.625″  45.3 ppf7.625″  47.1 ppf7.625″  51.2 ppf7.625″  55.3 ppf7.75″  46.1 ppf8.625″  24 ppf8.625″  28 ppf8.625″  32 ppf8.625″  36 ppf8.625″  40 ppf8.625″  49 ppf9.625″  32 ppf9.625″  36 ppf9.625″  40 ppf9.625″  43.5 ppf9.625″  47 ppf9.625″  53.5 ppf9.625″  58.4 ppf9.625″  59.4 ppf9.625″  64.9 ppf9.625″  70.3 ppf9.625″  75.6 ppf10.75″  32.75 ppf10.75″  40.5 ppf10.75″  45.5 ppf10.75″  51 ppf10.75″  55.5 ppf10.75″  60.7 ppf10.75″  65.7 ppf10.75″  73.2 ppf10.75″  79.2 ppf10.75″  85.3 ppf11.75″  42 ppf11.75″  47 ppf11.75″  54 ppf11.75″  60 ppf11.75″  65 ppf11.75″  71 ppf13.375″  48 ppf13.375″  54.5 ppf13.375″  61 ppf13.375″  68 ppf13.375″  72 ppf16″  65 ppf16″  75 ppf16″  84 ppf16″  109 ppf18.625″  87.5 ppf20″  94 ppf20″  106.5 ppf20″  133 ppf8.625″ 44 ppf

 

5

 

4.276

Select the casing in use

Drillpipe OD and ID

 

inmm

 

6500

 

3

Casing shoe TVD

 

ftm

HWDP ID

 

6500

 

350

 

ftm

Casing shoe MD

HWDP length

 

17

 

psi/ftSG or kg/lppglb/ft3ppbkPa/m

 

8

 

2.8

 

inmm

Casing shoe strength gradient

DC OD and ID

 

12.25

 

inmm

 

160

 

ftm

Hole diameter

DC length

 

4.3

 

GallonsBarrelsLitresCubic metres

 

30

 

350

 

psiPakPaMPa

Pump output per stroke

SCR strokes/min and pressure

Post-kick data

 

14

 

psi/ftSG or kg/lppglb/ft3ppbkPa/m

 

1000

Drilling fluid density

SIDPP

 

psiPakPaMPa

 

8000

 

1200

Well TVD

 

ftm

 

8000

 

26

 

lm3bblft3

Well MD

Influx volume

  

Click here when any values are modified to update the result.

Calculations

Bottom hole pressure after closing the BOP

New mud gradient to balance bottom hole pressure

Mud weight equivalent of the gradient

Length of drillpipe in the hole

Surface to bit volume (drillstring volume)

and the number of strokes and time for the Surface to bit (kill Phase 1) volume.

Open hole length

Calculate the annular volume between open hole and drill collars.

Calculate the annular volume between open hole and drill pipe.

Calculate the annular volume between casing and drill collars.

Calculate the annular volume between casing and drill pipe.

Calculate the bit to shoe open hole annular volume

Calculate the shoe to choke annular volume

End of Phase 2 comes after pumping heavy mud down the drillstring and up to the casing shoe. The open hole is now full of heavy mud.

Strokes and time for Phase 2;

End of Phase 3 volume. This is completed after puming the annulus volume (“bottoms up”). The influx is all out and all that remains is to displace out the light mud that was originally in the drillstring at the start of the well kill.

Strokes and time for Phase 3;

End of final phase; complete the circulation.

Strokes and time for Phase 4;

Calculate the initial and final circulating pressures

Calculate the pressure drop per stroke

Calculate the number of strokes at 10% intervals during Phase 1.

Calculate the pressure for the number of strokes without units

Results

Bottom hole pressure

Kill mud gradient

Kill mud weight

Initial circulating pressure

Final circulating pressure

Phase 1, surface to bit

Strokes;   Time; 

Phase 2, bit to shoe

Strokes;   Time; 

Phase 3, ends after “bottoms up”

Strokes;   Time; 

Phase 4, complete circulation

Strokes;   Time; 

Phase 1 table and graph; oilfield units

Strokes psi

Phase 1 table and graph; metric units

Strokes kPa

Worksheet references

Copyright Drillers.com Inc.

The variable names used in all Drillers.com worksheets can be found at www.drillers.com/download/standardvariablenames.doc .

Aberdeen Drilling Schools. Well Control for the Rig-Site Drilling Team.

Version 1 of this worksheet was released on 3 October 2008 by Steve Devereux.

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