LCM composition with controlled viscosity and cure time and methods of treating a lost circulation zone of a wellbore
US11332656B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Dec 18, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lost circulation material (LCM) composition for sealing lost circulation zones in wellbores may include 50 weight percent to 97 weight percent epoxy resin, 2 weight percent to 30 weight percent curing agent, 0.1 weight percent to 40 weight percent weighting material, and 0.1 weight percent to 20 weight percent amide accelerator. The LCM composition may have a density of greater than or equal to 1121 kilograms per cubic meter and may be capable of being injected through a drill bit of a drill string into the lost circulation zone. The amide accelerator may enable the viscosity of the LCM composition to be reduced while providing a reduced cure time. The LCM compositions are suitable for treating high-injectivity lost circulation zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.