Managed pressure drilling
US8955619B2 · kind B2 · utility
5Cited by
54References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2005 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Apr 25, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.