High-strength, thin-wall, all-steel drill pipe may provide solution for ultra-extended-reach wells

摘要

Modeling strongly suggests that the uERD project is technically feasible but requires the development of the next generation in drill pipe technology In every well design case, the VM165 triple taper design - 6 ~(5/8)-in. X 5 ~(7/8)-in. x 5-in. - with the high-strength tool joints satisfies the torque, tensile and hydraulic performance requirements with sufficient safety margins. The 135k tool joints along with broadening connection performance makeup envelope will definitely add value. This means that having a connection with a wider make and break window will reduce fatigue of tool joints and surface running equipment. The leap from 150 to 165 ksi is monumental in improving the ability to reach extended targets, but, in actuality, with respect to chemistry and connection design, these are simply enhancements to existing technology. To date, five sizes of VM-165 have been successfully manufactured, and lab tests have been conducted. All small-scale test results either meet or exceed a strenuous purchase specification. The knock-on effects have been significant but not insurmountable, and, once combined with the 165, will allow drilling to push well beyond the current drilling envelope. This project is evidence that even with a tight time line - it started just two years before projected spud - collaboration works. Final proof will be in the execution.