发明名称 |
Systems and techniques to actuate isolation valves |
摘要 |
<p>A tool that is usable in a well and may include an operator, a switch, a resilient device and an indexer. The switch may be configured to selectively communicate a first force to the operator, thereby actuating the tool. The resilient device may exert a second force. The indexer may cycle through a sequence of positions in response to alternating between the second force and a third force. The sequence includes a predetermined position configured to actuate the switch, thereby communicating the first force to the operator to actuate the tool.</p> |
申请公布号 |
GB2470676(A) |
申请公布日期 |
2010.12.01 |
申请号 |
GB20100014553 |
申请日期 |
2009.03.16 |
申请人 |
SCHLUMBERGER HOLDINGS LIMITED |
发明人 |
ARIN BASMAJIAN;BRAD SWENSON;JOHN R WHITSITT |
分类号 |
E21B33/14;E21B23/00;E21B34/10 |
主分类号 |
E21B33/14 |
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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