Chapter Four: Pressure Control

Kill Sheets and Related Calculations

Normal kill sheet

Prerecorded data

• Original mud weight (OMW) ______________________________ ppg

• Measured depth (MD) ___________________________________ ft

• Kill rate pressure (KRP) _____________ psi @ ______________ spm

• Kill rate pressure (KRP) _____________ psi @ ______________ spm

Drill string volume

• Drill pipe capacity ____________ bbl/ft ____________ length, ft = ____________ bbl

• Drill pipe capacity ____________ bbl/ft ____________ length, ft = ____________ bbl

• Drill collar capacity ____________ bbl/ft ____________ length, ft = ____________ bbl

• Total drill string volume _______________________________ bbl

Annular volume

• Drill collar/open hole Capacity _________ bbl/ft __________ length, ft = __________ bbl

• Drill pipe/open hole Capacity _________ bbl/ft __________ length, ft = __________ bbl

• Drill pipe/casing Capacity _________ bbl/ft __________ length, ft = __________ bbl

• Total barrels in open hole ______________________________ bbl

• Total annular volume __________________________________ bbl

Pump data

• Pump output ______________ bbl/stk @ ____________ % efficiency

• Surface to bit strokes:

  • Drill string volume ____________ bbl pump output, bbl/stk = ____________ stk

• Bit to casing shoe strokes:

  • Open hole volume ____________ bbl pump output, bbl/stk = ____________ stk

• Bit to surface strokes:

  • Annulus volume ____________ bbl pump output, bbl/stk = ____________ st

• Maximum allowable shut-in casing pressure:

  • Leak-off test ____________ psi, using ____________ ppg mud weight

  • @ casing setting depth of __________________________________ TVD

Kick data

• SIDPP ________________________________________________ psi

• SICP__________________________________________________ psi

• Pit gain ________________________________________________ bbl

• True vertical depth ________________________________________ ft

Calculations

Kill weight mud (KWM)

• = SIDPP ________ psi 0.052 TVD ________ ft + OMW...