发明名称 |
MATERIAL SENSITIVE DOWNHOLE FLOW CONTROL DEVICE |
摘要 |
A screen section (1) has a valve assembly to control flow through it. The valve is open and has a closure spring held compressed by a shape memory or swelling material (6) that responds to the presence of a specific well fluid or fluids so that its property changes to allow the spring (7) to deliver the stored potential energy to the valve member to close it when the specific well fluid or fluids are detected. The preferred material is a shape memory polymer that, for example, is sensitive to the presence of water or methane and gets softer to release the potential energy source to operate the downhole tool.
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申请公布号 |
WO2008079777(B1) |
申请公布日期 |
2008.10.09 |
申请号 |
WO2007US87780 |
申请日期 |
2007.12.17 |
申请人 |
BAKER HUGHES INCORPORATED;O'MALLEY, EDWARD, J.;RICHARD, BENNETT |
发明人 |
O'MALLEY, EDWARD, J.;RICHARD, BENNETT |
分类号 |
E21B34/08;E21B23/04;E21B34/14;E21B43/08 |
主分类号 |
E21B34/08 |
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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