Method for controlling the head of a drilling or core-drilling device and apparatus for carrying out this method
US5501285A · kind A · utility
28Cited by
12References
35Claims
0Family size
Inventors
Key dates
| Filing date | Jul 18, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Jul 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Electrodes are provided in a drill bit, or alternatively, in a coring bit, to measure variations in formation resistivity surrounding an earth borehole. Three orthoganal accelerometers are also provided in the drill bit, or in the coring bit, to monitor the dynamic behavior of the bit as functions of radial, axial and tangential accelerations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.