Equipment and methods for determining waiting-on-cement time in a subterranean well
US9212548B2 · kind B2 · utility
0Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2011 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Aug 31, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved equipment and methods for determining the waiting-on-cement time after a cementing operation involve an optic-fiber coil that immersed in the cement slurry downhole. The intensity of a reflected light signal from the coil is monitored versus time. Attenuation of the reflected-light intensity corresponds to the development of gel strength, allowing operators to unambiguously determine when well-bore operations may recommence after a cement job. The optic-fiber coil is wound around a spool such that there is at least one coil crossing on the spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.