发明授权
- 专利标题: Well latch
- 专利标题(中): 好锁
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申请号: US786380申请日: 1977-04-11
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公开(公告)号: US4164977A公开(公告)日: 1979-08-21
- 发明人: Henry P. Arendt , Thomas M. Deaton , Donald L. Dooley
- 申请人: Henry P. Arendt , Thomas M. Deaton , Donald L. Dooley
- 申请人地址: TX Dallas
- 专利权人: Otis Engineering Corporation
- 当前专利权人: Otis Engineering Corporation
- 当前专利权人地址: TX Dallas
- 主分类号: E21B23/02
- IPC分类号: E21B23/02 ; E21B23/06 ; E21B33/129 ; E21B33/126
摘要:
Disclosed is a well latch for locking well tools in a well flow conductor. The latch housing has a pressure equalizing passage extending through its wall. A valve controls flow through the equalizing passage. Keys, carried by the latch housing, are expanded outwardly into a locking groove of a well flow conductor to lock the well latch therein. A fishing neck, associated with the latch, permits retrieval of the latch. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.
公开/授权文献
- US5825811A Method and apparatus for facilitating inbound channel access 公开/授权日:1998-10-20