发明名称 |
Safety valve for use in an injection well |
摘要 |
The present invention provides for a valve to allow injection of fluids into a well or other subterranean facility. The valve comprises a housing and a flow tube assembly disposed in the housing. A restrictor is joined with the flow tube to restrict flow through the flow tube. A seal element also is positioned to selectively prevent production or upward flow of fluids through the valve upon halting injection operations. |
申请公布号 |
GB2422393(B) |
申请公布日期 |
2009.02.11 |
申请号 |
GB20060001310 |
申请日期 |
2006.01.23 |
申请人 |
SCHLUMBERGER HOLDINGS LIMITED |
发明人 |
DAVID E MCCALVIN |
分类号 |
E21B34/10;E21B34/00;E21B34/08;E21B47/01 |
主分类号 |
E21B34/10 |
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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