A 9 5/8 in intermediate casing to be set at the depth of 7,991ft. The mud weight
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A 9 5/8 in intermediate casing to be set at the depth of 7,991ft. The mud weight is 12.41 ppg, the formation pore pressure is0.751 psi/ft. and a bottom hole pressure of 4,612 psi is expectedwhen drilling the next hole section. The surface casing of 13 3 8in. is set at 3,000 ft. Assume that all API L, K and N grades areavailable. All the relevant information is given in the tables aregiven below.
i. Design a combination intermediate casing string for the worstpossible loading conditions. (25 marks)
ii. Estimate the number of sacks of cement required for theintermediate casing. (15 marks)
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