Providing a low pressure condition in a wellbore region
US6966377B2 · kind B2 · utility
25Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2004 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Mar 6, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method includes positioning a string in a wellbore, the string having a surge chamber. A closure member is provided below the well surface, with the surge chamber defined at least in part by the closure member. At least one port to the chamber is opened to create a fluid surge into the surge chamber and a local low pressure condition in a wellbore region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.