发明名称 STEP-TO-STEP WEDGE THREAD CONNECTIONS AND RELATED METHODS.
摘要 <p>A threaded connection includes a pin member comprising a first pin step and a second pin step, and pin wedge threads disposed on each of the first and second pin steps and a box member comprising a first box step and a second box step, and box wedge threads disposed on each of the first and second box steps, wherein an axial separation of the first and second pin steps differs from an axial separation of the first and second box steps.</p>
申请公布号 MX2013003350(A) 申请公布日期 2013.06.05
申请号 MX20130003350 申请日期 2011.09.21
申请人 HYDRIL COMPANY.* 发明人 DAVID LLEWELLYN MALLIS;GARY W. WARD
分类号 E21B17/02;F16L15/00 主分类号 E21B17/02
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