Passive magnetic ranging
US11086043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2019 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Oct 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method comprises a) positioning a passive magnetic ranging (PMR) tool in a drilling well that is near a target well that includes a ferromagnetic casing, b) measuring with each of the magnetometers a local magnetic anomaly created by the ferromagnetic casing of the target well so as to generate a plurality of magnetometer readings corresponding to the positions of the magnetometers; c) receiving the plurality of magnetometer readings with the controller; and d) using the received measurements to calculate ranging information, the ranging information including the range and direction from the PMR tool to the target well. The PMR tool may include a ranging collar, a longitudinal array of magnetometers extending along the length of the ranging collar, and a controller, the controller operatively connected to the plurality of magnetometers. The PMR tool may further comprise a radial array of magnetometers positioned radially about the ranging collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.