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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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958 Drilling and Well Completions<br />

P, = 0.052 x 10,000 x 10 = 5,200 psi<br />

The upward force acting on the sub is<br />

F, = 96,980 lb<br />

The downward stress due to the mud pressure (neglecting the differential<br />

pressure) is<br />

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