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HW #5. Casing Design Solution

# HW #5. Casing Design Solution - PETROLEUM ENGINEERING 661...

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PETROLEUM ENGINEERING 661 Homework #5. Due October 8, 2004 1. Casing Design (two weights) Please design a 5 1/2" O.D. casing string to 16,500 ft, using any of the P- 110 casing weights available in the Halliburton* book. Assume worst possible conditions (no backup for burst or collapse, etc.). Use the API design factors (Collapse 1.125, Burst 1.1, Tension 1.8). The weight of the mud in the hole is 14.0 lb/gal. Expected formation pressure below the casing seat is 10,500 psi. Please design the most economical combination casing string for this well. Also, please complete the casing design sheet (attached to the API Casing Design Tables provided in class). CALCULATE THE FOLLOWING: 1. Weight/ft of casing in bottom section of string ........... 23 ........... lb/ft 2. Length of bottom section ........... 3607 ........... ft 3. Weight/ft of casing in top section of string ................ 23 ....... lb/ft 4. Total weight of string in air ............... 340,821 lbs 5. What kind of threads should be used near the top .................... Buttress 6. Actual weight of string in mud , considering buoyancy, and assuming that the string is full of mud on the inside .......... 264.355.. lbs

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HW #5. Casing Design Solution - PETROLEUM ENGINEERING 661...

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