Method of correcting axial and transverse error components in magnetometer readings during wellbore survey operations
US5623407A · kind A · utility
19Cited by
8References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is directed to a method for compensating V2 for bias error on one or more magnetometers used for one or more borehole directional surveys, comprising determining the constant or first-order varying bias values which minimize the variance of computed local magnetic field vectors with respect to central values, which may be either independent estimates of the local magnetic field vector or the mean values of the computed local magnetic field vectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.