Question: QUESTION 1 The maximum weight to be applied to the bit during the next interval of hole is 60,000 lbs. The drillstring will be composed

QUESTION 1

The maximum weight to be applied to the bit during the next interval of hole is 60,000 lbs. The drillstring will be composed of 5-in, 19.5 lb/ft drillpipe and 2.75 x 8.0 in. drill collars and the maximum mud density anticipated is 13 ppg.

Calculate the minimum length of drill collars required to prevent a buckling tendency in the drillpipe.

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