Proppant charge and method
US4443347A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1983 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | May 13, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is provided for propping a fracture in a subterranean formation which comprises injecting into a subterranean well a suspension in a carrier fluid of a pre-cured proppant charge, the pre-cured proppant charge being pre-cured prior to injection into the well, and comprising prior to injection into the well, resin coated sand particles most of which are composed of a single substrate particle with a thermoset resite coating thereon, the resite coating being one which, when it is the resin coating on sand particles of a proppant charge, produces a charge wherein at least one of: (a) the Conductivity Ratio thereof, throughout a given closure stress range, is greater than that of a charge of the uncoated sand particles having substantially the same particle size distribution; or (b) the Permeability Ratio thereof, throughout the stress range of about 2,000 to about 10,000 p.s.i., is at least about 30 perecnt that of a sintered bauxite charge of substantially the same particle size, the resin for the coating being at least one of: (1) a resole; or (2) a novolac.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.