Stress sensor for cement or fluid applications
US10451497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Sep 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/242
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method measuring subterranean stress. The system and method includes a non-destructive sheath enveloping a tubular structure positioned in direct contact with a lateral subterranean rock formation for sensing expansive changes in the subterranean rock formation. A fiber optic is directly embedded in the non-destructive sheath positioned adjacent to the exterior surface of the tubular structure. The fiber optic transmits light and thereafter receives light in proportion to the expansive changes in the subterranean rock formation. A spectrometer connected to the fiber optic remote from the non-destructive sheath. The spectrometer measures hydrostatic stress in the subterranean rock formation without estimating acoustoelastic effects or occluding the tubular structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.