Method and system for determining downhole optical fiber orientation and/or location
US10175384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2017 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Oct 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/68
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A probe is provided that contacts the inner surface of the casing or other production tubing and imparts energy to the surface at the contact point, for example as heat energy or mechanical energy. Energy is imparted around the circumference of the casing, and a fiber optic distributed sensor located on the outer surface of the casing is used to measure and record the energy that it receives while the probe is moved to impart energy around the circumference. A record of energy versus position of the probe around the circumference can be obtained, from which maxima in the detected energy measurements can then be found. The position around the circumference which gave the maximum measurement should be the position at which the optical fiber of the fiber optic distributed sensor is located. In addition, an ultrasonic arrangement is also described, that relies on ultrasonic sound to provide detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.