## When pulling WET pipe Step

Barrels displaced

number average of stands x length per x pulled stand, ft pipe disp., bbl/ft i

pipe cap., bbl/ft barrels displaced f casing capacity, bbl/ft

(pipe disp., bbl/ft vpipe cap., bbl/ft x 0.052 x mud weight, ppg

Example: Determine the hydrostatic pressure decrease when pulling WET pipe out of the hole:

Number of stands pulled = 5 Average length per stand = 92 ft Pipe displacement = 0.0075 bbl/ft

Pipe capacity Casing capacity Mud weight

Step 1

Barrels displaced

Barrels displaced

Step 2

### HP, psi decrease

• 5 stands x 92ft/std x
• 11.6196
1. 0075 bbl/ft ^ +
2. 01776 bbl/ft
3. 6196 barrels f 0.0773^

I bbl/ft J

0.01776 bbl/ft x 0.052 x 11.5ppg v

HP, psi = 0.052 x 11.5PPg decrease 0.05204

decrease

= 133.52psi

+3 -4

### Responses

• lori mcintosh
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