Method of isolating production zones in a well, and apparatus for implementing the method
US4913232A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jan 18, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/126
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention provides a method of separating at least two production zones in a well (P) using the following method and apparatus. The method is a method of making a sealing ring (18) in situ in an annular space (5) lying between a well (P) and casing (T) in the well, with the sealing ring being made adjacent to a production zone in the well, and with the method comprising the following stages: PA0 the annular space (5) to be occupied by the sealing ring (18) is delimited; and PA0 a sealing substance (11) is injected into the annular space. The apparatus comprises two confinement membranes (2--2) for sealing off the annular space (5); and PA0 separator membrane (8, 13) for separating the substance to be injected (11) from the fluids that normally exist between the well (P) and the casing (T), said separator membrane also serving to eject said fluids from said space (5). The invention is applicable to the drilling industry, and in particular to the oil industry, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.