Well slip assemblies
US4440223A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Oct 22, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1295
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is disclosed an hydraulically set well packer wherein sleeves carried about a tubular member which is connected as part of a tubing string are adapted to be moved from axially extended to axially retracted position in order to expand packing and slip elements carried about one of the sleeves into engagement with the well bore in which the string is disposed. The packer also includes means which forms an atmospheric chamber including a piston on one of the sleeves, and a means for locking the sleeves in retracted position is disposed within such chamber. The slip assembly carried by the packer includes upper and lower bowls and upper and lower sets of interconnected slips which are carried by the bowls for sliding thereover between radially contracted and expanded positions in response to movement of the slip bowls toward and away from one another as the sleeves move between extended and retracted positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.