Method for reducing drilling torque in the drilling of a deviated wellbore
US4643264A · kind A · utility
8Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Nov 6, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary well drilling system employs a drill pipe with a drill bit affixed at its lower end for the drilling of a deviated wellbore. Drilling fluid is circulated through the drill pipe to remove drill cuttings. The drill bit is rotated in the opposite direction from that of the drill pipe to reduce the torque required to rotate the drill pipe as it is rotationally dragged along the lower side of the wellbore walls during the drilling of the deviated wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.