Method of cement for well cementing in penetrated hydrate layer
US11719658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Nov 28, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.