Optical casing collar locator systems and methods
US9127532B2 · kind B2 · utility
2Cited by
83References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2012 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Mar 28, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/135
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Fiber optic enabled casing collar locator systems and methods include a wireline sonde or a coil tubing sonde apparatus configured to be conveyed through a casing string by a fiber optic cable. The sonde includes at least one permanent magnet producing a magnetic field that changes in response to passing a collar in the casing string, a coil that receives at least a portion of the magnetic field and provides an electrical signal in response to the changes in the magnetic field, and a light source that responds to the electrical signal to communicate light along an optical fiber to indicate passing collars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.