发明名称 |
Positive indication system for well annulus cement displacement |
摘要 |
An annulus collar around a well production tube is cast in cement by a procedure that axially delineates the collar between two expandable well packers in the production tube string. Between the packers are a pair of cementing valves. An ingress valve is most proximate to the lower packer whereas an egress valve is most proximate to the upper packer. Additionally, the egress valve is modified to enclose the egress valve with a screen having mesh or slot openings that correspond with a screen plugging material that is mixed with the cement.
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申请公布号 |
US6668923(B2) |
申请公布日期 |
2003.12.30 |
申请号 |
US20020128473 |
申请日期 |
2002.04.23 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
VINCENT RAY P.;JOHNSON JOHN JOSEPH |
分类号 |
E21B33/14;E21B34/06;E21B34/14;E21B43/10;(IPC1-7):E21B33/13;E21B43/04 |
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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