发明名称 |
Valves |
摘要 |
A downhole valve (10) comprises a body (12) defining a through bore (14) and a valve seat (16, 17); and a valve member (18) mounted in the body and moveable between positions to open and close the body bore (14). The valve member (18) defines a segment of a wall of a hollow sphere. In the open position the valve member (18) is located to one side of the bore (14) and in the closed position the valve member (18) engages the valve seat (16, 17).
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申请公布号 |
US2002007950(A1) |
申请公布日期 |
2002.01.24 |
申请号 |
US20010910644 |
申请日期 |
2001.07.20 |
申请人 |
SIMPSON NEIL ANDREW ABERCROMBIE;MACKAY ALEXANDER CRAIG |
发明人 |
SIMPSON NEIL ANDREW ABERCROMBIE;MACKAY ALEXANDER CRAIG |
分类号 |
E21B34/06;(IPC1-7):E21B34/06 |
主分类号 |
E21B34/06 |
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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