Compositions for sealing a lost circulation zone in a wellbore
US10988664B2 · kind B2 · utility
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64References
20Claims
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Key dates
| Filing date | Mar 5, 2020 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Mar 5, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition for sealing a lost circulation zone in a wellbore is disclosed that includes from 50 weight percent to 97 weight percent epoxy resin and from 2 weight percent to 30 weight percent curing agent based on the total weight of the composition. The epoxy resin may include at least one of 2,3-epoxypropyl o-tolyl ether, alkyl glycidyl ethers having from 12 to 14 carbon atoms, bisphenol-A-epichlorohydrin epoxy resin modified with an oxirane mono [(C12-C14)-alkyloxy)methyl] derivative, or a compound having formula (OC2H3)—CH2—O—C6H12—O—CH2—(C2H3O).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.