发明名称 |
A SHOE FOR WELLBORE LINING TUBIN |
摘要 |
<p>This invention relates to a shoe for wellbore lining tubing and to a method of locating wellbore lining tubing in a wellbore. In one embodiment, a shoe (30) is disclosed which includes a tubular outer body (32) that is coupled to a wellbore lining tubing (28), and a tubular inner body (36) located within the outer body and coupled to fluid supply tubing (38). A generally annular flow area (44) is defined between the bodies which is in selective fluid communication with the wellbore (10), for the return flow of fluid from the wellbore through a flow port (62) in the outer body, along the shoe and into an annulus (46) defined between the wellbore lining tubing and the fluid supply tubing. A valve assembly (40) of the shoe has an actuating member (92) located within the inner body, and a flow controller (96) for selectively closing the flow port. A ball (98) is used to prevent further fluid flow through the inner body into the wellbore. Exposure of the actuating member to fluid at a first fluid pressure then causes the actuating member to move to an actuating position where the flow controller closes the flow port. Exposure to fluid at a second fluid pressure higher than said first pressure reopens fluid flow from the inner body into the wellbore.</p> |
申请公布号 |
WO2007012842(A1) |
申请公布日期 |
2007.02.01 |
申请号 |
WO2006GB02779 |
申请日期 |
2006.07.24 |
申请人 |
CALEDUS LIMITED;WARDLEY, MICHAEL;HOWLETT, PAUL |
发明人 |
WARDLEY, MICHAEL;HOWLETT, PAUL |
分类号 |
E21B21/10;E21B21/12;E21B43/10 |
主分类号 |
E21B21/10 |
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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