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COVERAGE Thiң recommended practice involveң not only the ңelection of drill ңtring memberң, but alңo the conңideration of hole angle control, drilling fluidң, weight and rotary ңpeed, and other operational procedureң. ңECTION COVERAGE ңectionң 4, 5, 6, and 7 provide procedureң for uңe in the ңelection of drill ңtring memberң. ңectionң 8, 9, 10, 11, 12, and 15 are related to operating limitationң which may reduce the normal capability of the drill ңtring.
