BAKER HUGHES - Drilling Fluids Reference Manual

PRESSURE PREDICTION AND CONTROL
Shut-In Drillpipe Pressure (SIDP)
Shut-In Casing Pressure (SICP)
Pit Volume Increase
Depth
Hole Size
Drillpipe
500 psi
650 psi
15 bbl
12,000 ft
8½ in.
5 in., 19½ lb m /ft IEU
Collars 210 ft, 7" × 3"
Casing
Pump
Kill Rate
Kill Rate Pressure
9 5 / 8 " @ 10,000 ft, 47 lb m /ft N80
6 × 16 Duplex
30 spm
750 psi
The fluid weight increase is calculated and the fluid weight in the pits is increased. While the
fluid weight in the pits is being increased a Well Control Kill Sheet is filled out. The
information on the Kill Sheet is completed as follows:
• Basic Data – Record the basic data necessary to make the well kill calculations. Circulating
pressures and pump outputs should be pre-recorded.
• Record – Pressures and pit level gains.
Calculate
Initial Circulating Pressure = Slow Circulating Pressure + SIDP
New Fluid Density = (SIDP) / (0.052) / (TVD) + Old Fluid Density
Final Circulating
New FluidDensity
pressure =
Old Fluid Density×
SlowCirculating pressure
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 12-32