Hydraulic fracturing with improved viscosity liquefied industrial gas based solution
US9243182B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 21, 2012 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Jan 7, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/68
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is a cryogenic subterranean fracturing fluid, comprising a liquefied industrial gas and a viscosity increasing additive. The liquefied industrial gas may be liquefied carbon dioxide, liquefied nitrogen, or a blend of the two. The liquefied industrial gas mixture should be substantially free of water. In this context, substantially free of water means less than 10% water by volume, or preferably less than 5% water by volume. In addition to the viscosity increasing additive, a proppant may be added to the fracturing fluid. In addition to the viscosity increasing additive and/or proppant additional additives may be added to the liquefied industrial gas as required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.