Horizontal or extended reach drilling is a rapidly emerging technology that, in some areas, can be considered the norm rather than the exception. While most horizontal drilling is done with the same pipe that would be used in the same size vertical hole, a different pipe or tool joint type may improve the overall drilling performance and efficiency. This paper discusses drill pipe selection based on the influence of:

  1. Pipe weight on torque and drag,

  2. Pipe OD and ID dimensions on torsional strength, buckling capacity, fatigue resistance and hydraulic efficiency, 3) Tool joint dimensions on torsional strength and hydraulic efficiency.

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