Slip with altering load distribution feature
US9752418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2013 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Sep 18, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1291
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A liner hanger has slips held by a slip body. A potential energy force to move the slips axially when the hanger is in position is selectively released. The nature of the loading between the slips and the casing changes from a radial reaction force from the casing going into the slip and then distributed circumferentially to the slip housing to an essentially axial loading of the slip housing down onto the slip that has penetrated the casing with an opposite reaction force in the casing wall. The contact location between the slip housing and the slip is made broader at the slip end with a wider portion having an undercut to reduce contact stress and to aid in promoting flow past the set slip. The slip housing also has axial flow channels that interact with the undercut to promote flow past the set slips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.