Compositions and processes for treating subterranean formations
US7013995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method and materials for stabilizing a wellbore against excess fluid pressure is described. It comprises forming or placing a flexible and essentially impermeable lining on or in the wellbore wall. The flexibility of the lining ensures that it remains in compression as the pressure in the wellbore is increased above the fluid pressure in the surrounding rock and it therefore does not need high tensile strength. The lining may be a preformed elastomer sleeve or formed in situ by the use of a reactive drilling fluid. Appropriate reactive formulations are described for the situation where the rock contains significant quantities of clay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.