Optical cable, optical cable monitoring system, and well monitoring method
US12241365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2020 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Aug 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical cable includes: an optical fiber for sensing deformation of hydrocarbon absorbing resin having a property of expanding by absorbing hydrocarbon in oil; a strand provided so as to surround the outer circumference of the optical fiber; and hydrocarbon absorbing resin filling a space between the optical fiber and the strand. The optical cable configured as described above is installed along the depth direction of a well that is a measurement subject, over the entire range thereof, and a backscatter light frequency shift signal from the optical fiber is measured by a backscatter light measurement device, to detect presence/absence of leakage of oil from the well over the entire range in the depth direction of the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.