Stripper/packer
US6484808B2 · kind B2 · utility
20Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stripper/packer includes first and second packing elements, which are interchangeable to alleviate inventory concerns. The upper actuating hydraulic piston is the same diameter as the lower piston, which allows the operator to utilize the same amount of pressure to maintain a seal during transition between packing elements. Both packing elements are separately actuated from the lower side allowing the wellbore pressure to assist the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.