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发明名称
Differential Pressure Operated Circulating and Deflation Valve
摘要
申请公布号
CA2106698(A1)
申请公布日期
1994.03.23
申请号
CA19932106698
申请日期
1993.09.22
申请人
WALTER, JEFFREY S.;TUCKER, JAMES C.;ZIMMERMAN, JOHN C.
发明人
WALTER, JEFFREY S.;TUCKER, JAMES C.;ZIMMERMAN, JOHN C.
分类号
E21B34/08;(IPC1-7):E21B33/127
主分类号
E21B34/08
代理机构
代理人
主权项
地址
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