High temperature fiber optic turnaround
US9335224B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2011 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Apr 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/44382
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensing cable includes a pair of sensing fibers that are connected to one another by a U-shaped turnaround section. The turnaround section is a section of sensing fiber coated with a jacket that includes metallic components. The turnaround section is bent and, then, annealed according to a method of the present invention. The turnaround section is robust and reduced in size (i.e., radius). The sensing cable also includes an inner sleeve that surrounds the sensing fibers and an elongated outer armor casing (i.e., including an armor tube and a sealing cap) that encases a terminating end thereof. The armor tube and the sealing cap protect the sensing fiber from mechanical and chemical harm, are reduced in size and facilitate insertion of the sensing cable into downhole environments. The sensing cable has improved operating range up to 300° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.