Method and device for determining elasticity of cement stone utilized in well cementing of oil-gas well
US10928282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2017 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Oct 31, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0284
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method and device of the present invention provide a universal comparing platform for research on hardened cement modification as well as examination of domestic and foreign special cement slurry systems, which is of great significance in evaluation of well hole integrity and well life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.