发明名称 |
Retrievable annulus and tubing flow control valves |
摘要 |
A flow control and safety valve for oil wells where control of flow in the casing annulus is accomplished with a wire-line retrievable device. A basic valve structure provides for control of flow in the casing annulus by means of a control line to the surface. A number of additional functions can be added to the basic valve structure to accomplish control of flow through the tubing string and can accommodate control of dual and triple zone recovery. These additional functions are accomplished by landing additional wire-line retrievable valves within the basic structure whereby independent control of the annulus and tubing string flows is possible, at the same time affording increased flow diameters for a greater volume of production in a given casing size.
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申请公布号 |
US4271903(A) |
申请公布日期 |
1981.06.09 |
申请号 |
US19790029855 |
申请日期 |
1979.04.13 |
申请人 |
COALINGA CORPORATION |
发明人 |
SLAGLE, JR., GRADY M.;THOMAS, JR., DONALD O. |
分类号 |
E21B33/129;E21B34/10;(IPC1-7):E21B33/12 |
主分类号 |
E21B33/129 |
代理机构 |
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代理人 |
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地址 |
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