发明名称 |
FLUID PRESSURE SET AND RELEASED WELL PACKER APPARATUS |
摘要 |
<p>APPLICATION FOR LETTERS PATENT OF TALMADGE L. CROWE FOR FLUID PRESSURE SET AND RELEASED WELL PACKER APPARATUS A double grip well bore packer run into a well casing on a pipe string has actuator means responsive to hydrostatic or applied fluid pressure to set anchor slips and deform a packing into engagement with the casing, and the setting force is locked into the packing. Pressure differential from below the packer actuates hold-down elements into engagement with the casing. A shearable member is sheared by a shear piston which is normally pressure balanced but rendered unbalanced when a releasing tool is seated in the packer and operated so that fluid pressure can act on the shear piston and release the packer for retrieval from the well casing.</p> |
申请公布号 |
CA1116511(A) |
申请公布日期 |
1982.01.19 |
申请号 |
CA19790327712 |
申请日期 |
1979.05.16 |
申请人 |
BAKER INTERNATIONAL CORPORATION |
发明人 |
CROWE, TALMADGE L. |
分类号 |
E21B33/128;E21B23/06;E21B33/1295;(IPC1-7):E21B33/126 |
主分类号 |
E21B33/128 |
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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