Fisica

Use the Well Data to answer the questions. Each question has only one correct answer.

WELL DATA

Well Depth 15,700 ft TVD 16,500 ft MD

Marine riser 1700 ft capacity = 0.360 bbls/ft

Choke line 1724 ft capacity = 0.0087 bbls/ft

Bit size 8.5”

Drill Pipe 5” OD. 19.5 lbs/ft Capacity = 0.01776 bbls/ft

Drill Collars 61/2” x 213/16” x 540 ft Capacity = 0.008 bbls/ft

Casing 95/8”, 47 lb/ft. P110 8.681” ID 100% Internal yield = 10,900 psi Set at 14,000 ft TVD – 14,200 ft MD RKB

Mud weight in use 12.4 ppg.

Pump output 0.117 bbls/stk

PUMP PRESSURE

While Drilling 3500 psi at 75 spm (APL = 270 psi)

Slow Pump Rate Up Riser 980 psi at 40 spm (APL = 75 psi) 250 psi at 20 spm (APL = 20 psi)

CLFL with 11 ppg mud 125 psi at 20 spm 500 psi at 40 spm

ANNULAR VOLUMES

Drill pipe - Casing = 0.0489 bbls/ft Drill pipe - Open hole = 0.0459 bbls/ft Drill collars - Open hole = 0.0292 bbls/ft Drill pipe – Riser = 0.336 bbls/ft

WELL CONTROL DATA

SIDPP = 700 psi SICP = 1150 psi GAIN = 30 bbls

LEAK OFF TEST DATA

3650 PSI with 11 ppg mud

1. What is the total capacity of the drill string?

A. 288 bbls B. 162 bbls C. 335 bbls D. 456 bbls

2. Calculate the total annular capacity with the pipe on bottom?

A. 722 bbls B. 443 bbls C. 987 bbls D. 323 bbls

3. What is the surface to bit time with the pump running at 40 spm?

A. 61 minutes B. 25 minutes C. 87 minutes D. 54 minutes

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