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发明名称
Retractable downhole backup assembly for circumferential seal support
摘要
申请公布号
GB2496535(A)
申请公布日期
2013.05.15
申请号
GB20130000705
申请日期
2011.07.18
申请人
BAKER HUGHES INCORPORATED
发明人
DAVID S BISHOP;JAMES C DOANE;DENNIS E KROLL
分类号
E21B33/129;E21B33/128
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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