Systems and methods for breaking friction reducers in-situ
US10344205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2015 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Oct 27, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/267
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A system and methods for breaking friction reducers in subterranean formations in-situ during hydraulic fracturing operations are disclosed. A method of fracturing a subterranean formation is disclosed, including providing a well treating fluid, adding a friction reducer into a water phase of an emulsion, adding a breaker into the water phase, and injecting the well treating fluid into the subterranean formation at a pressure sufficient to fracture the subterranean formation and invert the emulsion and double emulsion, thereby allowing the breaker to break the friction reducer. A friction reducer-breaker system for breaking a friction reducer polymer in-situ is also disclosed, including an oil phase, a water phase including friction reducer polymers and breakers in double emulsion dispersed throughout the water phase, wherein the emulsion and double emulsion are configured to invert under shear, thereby providing for mixing between the friction reducer polymers and the breakers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.