Apparatus for actuating an annular piston
US6966370B2 · kind B2 · utility
58Cited by
371References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Feb 20, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus comprising a first tubular member; a second tubular member positioned within and coupled to the first tubular member; a first annular piston chamber defined by the space between the first and second tubular members; an annular piston movably coupled to the second tubular member and positioned within the first annular piston chamber; and a third tubular member for receiving the first and second tubular members coupled to the first tubular member. The third tubular member comprises a radially expandable and plastically deformable tubular member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.