Apparatus and method for well operations
US9279301B2 · kind B2 · utility
29Cited by
15References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2011 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Sep 14, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for modifying a return fluid in a wellbore comprises disposing at least one controllable flow restrictor along a drill string in the wellbore. At least one parameter of interest is determined at at least one location along an annulus in the wellbore. Controllably actuating the at least one flow restrictor to modify a local property of a return fluid in the annulus based at least in part on the measured parameter of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.