Ranging measurements using modulated signals
US10139515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for performing ranging measurements within a formation includes transmitting an asymmetric time-varying signal from a transmitter (114) disposed within a borehole (106) in the formation. The asymmetric time-varying signal may have a signal characteristic that is based at least in part on a downhole characteristic. A (receiver 110) disposed within the borehole (106) may measure a magnetic field induced on an object (103) within the formation by the asymmetric time-varying signal. A direction to the object (103) from the borehole (106) may be determined based at least in part on the measurement of the induced magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.