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发明名称
TUBING HANGER WITH BALL VALVE IN THE ANNULUS BORE
摘要
申请公布号
EP1478825(A1)
申请公布日期
2004.11.24
申请号
EP20030709022
申请日期
2003.02.06
申请人
DRIL-QUIP, INC.
发明人
DEBERRY, BLAKE;REIMERT, LARRY, E.
分类号
E21B33/043;E21B34/00;E21B34/04;(IPC1-7):E21B33/043;E21B33/04
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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