Wellbore pressure control with optimized pressure drilling
US9249638B2 · kind B2 · utility
10Cited by
87References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2012 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Sep 7, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well system can include an accumulator in communication with a wellbore, whereby the accumulator applies pressure to the wellbore. A method of maintaining a desired pressure in a wellbore can include applying pressure to the wellbore from an accumulator in response to pressure in the wellbore being less than the desired pressure. Another well system can include a dampener in communication with a wellbore isolated from atmosphere, whereby the dampener mitigates pressure spikes in the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.