Drilling system with drill string valves
US8307913B2 · kind B2 · utility
12Cited by
17References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2008 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | May 1, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method to control borehole fluid flow includes detecting a drilling condition and operating at least one valve in the drill string to place an exterior of the drill string in fluid communication with an interior of the drill string in response to detecting the drilling condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.