Delayed water-swelling materials and methods of use
US9120963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2006 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Oct 17, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water absorbing composition includes a particle having a core of a water-swelling material. A coating substantially surrounds the core that temporarily prevents contact of water with the water-swelling material. The coating may be formed from a layer of water degradable material or a non-water-degradable, non-water absorbent encapsulating layer. A quantity of particles including delayed water-swelling particles formed at least in part from a water-swelling material and, optionally, non-water-swelling particles of the same or different size distributions can be used in treating a formation penetrated by a wellbore. A slurry of the particles is formed with a carrier fluid. The slurry of particles is introduced into the wellbore of the formation to facilitate treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.