Collet-cone slip system for releasably securing well tools
US6715560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | May 13, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A selectively released well tool anchor has a tubular wicker shoe cage and a tubular setting sleeve in sliding assembly over a tubular mandrel. The wicker shoe cage confines a plurality of independent wicker shoes. The tubular setting sleeve has a conical slip face that is loosely meshed with the shoe cage by a plurality of collet fingers extended from the conical slip face into meshed engagement with detents in the shoe cage. The collet fingers are secured within the detents for well run-in by calibrated shear fasteners. An axial translation of the setting sleeve toward the shoe cage by shearing the fasteners displaces the wicker shoes outwardly for inside wall penetration. The wicker shoes are disengaged from the wall by axial translation of the cage from the sleeve to engage mutual abutment faces on the cage and shoes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.