Nitrile derivative for sand control
US5256729A · kind A · utility
89Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1993 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Jan 22, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/267
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition and method for consolidating proppant or gravel for propping fractures about, or for gravel packs for sand control in, wells in subterranean formations characterized by an improvement in which there is used a combination of reactants, including a capped diisocyanate that will produce polyurethane and coat the catalyst in situ. Also disclosed are specific examples of satisfactory frac fluids, diluents and catalysts for both a specially designed one-pass system and, preferably, a two-pass system of putting and consolidating the proppant in a fracture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.