发明名称 EXTERNALLY ACTIVATED SEAL SYSTEM FOR WELLHEAD
摘要 A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
申请公布号 WO2009042121(A2) 申请公布日期 2009.04.02
申请号 WO2008US11020 申请日期 2008.09.23
申请人 VANBILDERBEEK, BERNARD, HERMAN 发明人 VANBILDERBEEK, BERNARD, HERMAN
分类号 E21B33/02;E21B23/00 主分类号 E21B33/02
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