Hydrostatic Pressure (HP) decrease when POOH
When pulling DRY pipe
Stands pulled
Length per stand
Pipe displacement
Casing capacity
Mud weight
HP decrease
psi
BBL displace
bbl
When pulling WET pipe
% of volume in drill pipe out of hole
Stands pulled
Length per stand
Pipe displacement
Pipe capacity
Casing capacity
Mud weight
BBL displace
bbl
HP decrease
psi