Problem 53: You are bringing on a well on choke with a subsea stack. The shut-in casing pressure is 800 psig. The drill pipe is 5.5-inch and held in tension with 500 ft of 8-by-3-inch drill collars.
The 12.25-inch PDC bit has 3 13/32-inch jets and is currently at 5,000 ft.
The pump pressure is 450 psi at 30 strokes per minute (SPM) on the pump.
When closing the BOP and opening the choke line to the poor boy degasser, the pressure is 750 psig when the pump rate is 30 SPM.
When bringing the well on choke, the reduced casing pressure (psig) is closest to: (A) 484
(B) 494
(C) 504
(D) 514.
This one is quick if you know what everything is definition-wise; expect simple problems occasionally and to waste time searching for a non-existent trick. Note the answer choices are not exact for this reason, to leave you wondering what you are missing. Solution: Guidebook 3 HYD 2; FC P179-180
SICP – Choke line loss = reduced csg pressure so 800 – (750 – 450) = 500.
Can you starting listing the page of the SPE exam reference relevant to the problems as well? This would be very helpful considering that is what we will be using on the exam. Thanks.
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