Liner hanging, sealing and cementing tool
US5857524A · kind A · utility
Inventors
Key dates
| Filing date | Feb 27, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A liner hanger will actuate remotely in a well to support a liner in casing. A running tool is secured to drill pipe and attached to the upper end of the liner. The liner hanger mounts to the exterior of the liner and includes a pair of tapered wedge members mounted in opposition to each other. The lower wedge member is stationarily secured to the liner for movement with it. The upper wedge member is carried in an extended running-in position by a retainer. A stop member is mounted above the lower wedge member by a connector. The connector secures the stop member to the liner for movement with it while running-in. Once on bottom, the stop member is released from the connector by stroking the drill pipe. Continued upward movement of the drill pipe will be relative to the stop member because it will engage the casing to remain stationery with the casing. The wedge members will move upward, with the upper wedge member contacting the stop member and being prevented from further upward movement. The retainer shears, allowing the lower wedge member to continue upward movement, sliding and wedging against the upper wedge member to lock the liner to the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.