Controlling the pressure within an annular volume of a wellbore
US7870905B2 · kind B2 · utility
7Cited by
28References
18Claims
0Family size
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Key dates
| Filing date | Mar 12, 2010 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Mar 12, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0396
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.