Method and device for consolidation a formation crossed by a well
US5242021A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Nov 4, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/424
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The method relates to the application to a deflected well (1) of a well-known consolidation process through the polymerization in situ of a liquid substance (L) injected within a zone (2) to be consolidated through an injection pipe (5), by interaction with a reacting gas G injected thereafter. In order to limit the zone of intervention and to properly distribute the substance and the gas all over this zone, a combination of a pipe whose wall is fitted with openings (11) all over the end part thereof (5a), a confining packer (8) and a solid separation element (10) displaced in the pipe after the liquid substance by the reacting gas, which prevents any interaction of the reacting gas before it reaches the zone to be consolidated, is used. Injecting the liquid mixture comprises successive stages of circulation between the inside of pipe (5) and the annulus between the pipe and the well (1) and of forcing to have it make through the formation properly. It is generally preceded by a stage of injection of solvent products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.