Expansion set liner hanger and method of setting same
US6877567B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2002 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Nov 26, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic liner hanger comprises a tubular body and a plurality of slips disposed radially around the outer surface of the body. In one arrangement, each slip has wickers for engaging the inner surface of a surrounding string of casing. Each slip is connected to a slip ring, the slip ring also being circumferentially disposed around the outer surface of the body. At least some of the slip members are received upon a wedge surface, or cone(s). In operation, an expander tool such as a hydraulic setting tool acts upon the liner hanger, causing the slips to be expanded into frictional engagement with the surrounding string of casing. The operator is then able to slack off the weight of the liner, allowing multiple slips to engage the casing and to suspend the liner therebelow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.