发明名称 |
REVERSE CIRCULATING CONTROL VALVE |
摘要 |
<p>A circulation control valve includes a top sub having a bore, a body connected to the top sub and having a first fluid passageway and a second fluid passageway parallel to the first fluid passageway, the bore communicating with both the first fluid passageway and second fluid passageway, a one-way valve in the second fluid passageway, and a first activatable block for the first fluid passageway. Upon upon activation of the block, fluid in the first fluid passageway is blocked and only flows through the second fluid passageway.</p> |
申请公布号 |
CA2266809(A1) |
申请公布日期 |
1999.11.07 |
申请号 |
CA19992266809 |
申请日期 |
1999.03.23 |
申请人 |
LEEB, RODNEY;LEEB, GERALD |
发明人 |
LEEB, RODNEY;LEEB, GERALD |
分类号 |
E21B34/14;(IPC1-7):E21B34/08 |
主分类号 |
E21B34/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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