Method for determining a time window in which a casing pressure test can be performed without damaging a cement sheath
US11061011B2 · kind B2 · utility
0Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2016 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/117
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for determining a time window in which a casing pressure test can be performed without damaging a cement sheath. The time window is determined by: determining the hydration degree of the cement at a given time for a considered pressure and temperature values in the well; and then comparing the determined hydration degree to a predetermined value. If the determined hydration degree is below the predetermined value, then the casing pressure test can be done without damaging the cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.