Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling
US6877241B2 · kind B2 · utility
17Cited by
30References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2002 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Aug 10, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/0224
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides methods of measuring downhole the curvature of a borehole and, in a particular application of the invention, using the curvature information as an input component of a bias signal for controlling operation of a downhole bias unit in a directional drilling assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.