Coiled tubing drilling system
US7753141B2 · kind B2 · utility
4Cited by
4References
20Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 20, 2006 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling rig for drilling an underground borehole (5) into a seam (4) uses coiled metal tubing (8) fed by a tractor unit (11) from a drum (7) to provide a thrust force to a drilling head. The drilling head has a bent-sub assembly giving an angle of deviation which is controlled by rotating the coiled metal tubing in the borehole by way of rotation of the drum (7) in the frame (12) about the axis of the tube in the borehole (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.