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Determine the number of drill collars

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Reference no: EM132416636

Assume that the available drill collar size is OD/ID, 9/3 in. and the weight is 192 lb/ft.

  1. Determine the number of drill collars required to provide a weight-on-bit of 55,000 lbf assuming hole deviation = 0° and mud density = 12 ppg.
  2. Repeat the calculations if the hole is deviated at 30° to the vertical.
  3. Find the length of drill collar section to keep drill pipes (7000 ft, 5-in., 18.5 lb/ft) under tension.

Reference no: EM132416636

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