Magnetometer bias and eddy current compensation for dynamic surveying preliminary
US12123297B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2023 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | May 5, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for drilling a subterranean wellbore includes rotating a bottom hole assembly (BHA) in the subterranean wellbore to drill, in which the BHA includes a drill collar, a drill bit, a roll-stabilized housing deployed in the drill collar and configured to rotate with respect to the drill collar, and triaxial accelerometer and triaxial magnetometer sets deployed in the roll-stabilized housing. Triaxial accelerometer and triaxial magnetometer measurements and a drill collar rotation rate measurement are made while the BHA rotates. A wellbore inclination and a gravity tool face of the roll-stabilized housing are computed from the triaxial accelerometer measurements. The computed inclination and gravity toolface, the triaxial magnetometer measurements, and the measured rotation rate of the drill collar are processed to compute an azimuth of the subterranean wellbore in which influences of eddy currents and magnetometer biases are accounted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.