This paper describes the development of a lightweight steel drillpipe with a 165-ksi [1137-MPa] yield strength. The drill-pipe was developed according to three design objectives and verified by full-size and material-evaluation tests. The lightweight steel drillpipe has two advantages over standard API G-105 pipe with the same pipe-body OD—it weighs 25% less and has a 20% lower hydraulic loss (loss of fluid pressure)—but maintains a performance level comparable with that of G-105 pipe.

Keywords:
drill pipe selection, lightweight steel drillpipe, drillstring design, strength, drillpipe, hydraulic loss, allowable section modulus, configuration, torque, pipe body
Subjects:
Drill pipe selection, Drillstring Design
Copyright 1991, Society of Petroleum Engineers
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