Wellhead isolation tool and method of fracturing a well
US7520322B2 · kind B2 · utility
6Cited by
48References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2007 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Dec 11, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A seal is formed between the second end portion and the tubular member. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.