发明名称 |
Downhole axial force generating tool |
摘要 |
An axial force generating tool for applying a force on a structure positioned within a borehole is taught. The tool includes a housing (19) sized to fit within the borehole in which the tool is required to act; an outer seal (38) disposed about the housing and selected to create a seal between the housing and the borehole; an inner bore (32) through the housing including a seal to prevent flow from the inner bore out through the lower end; an opening (34) to the inner bore above the seal; a bracing means (36) for maintaining the housing against axial movement in the borehole once the housing is in a selected position within the borehole; a piston (27) mounted in sliding engagement wiht the housing for axial movement relative to the housing, the piston positioned to act between a pressure differential establishable between the inner bore and the borehole between the seal and the lower end to drive the piston axially relative to the housing; and a grapple connected to the piston for axial movement therewith.
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申请公布号 |
US2004089445(A1) |
申请公布日期 |
2004.05.13 |
申请号 |
US20030473202 |
申请日期 |
2003.09.29 |
申请人 |
ANGMAN PER G.;HUGHES JOHN |
发明人 |
ANGMAN PER G.;HUGHES JOHN |
分类号 |
E21B17/06;E21B23/04;E21B23/10;(IPC1-7):E21B34/02 |
主分类号 |
E21B17/06 |
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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