Method for casing using multiple expanded areas and using at least one inflatable bladder
US8157007B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Oct 15, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The method of the invention comprises inserting into the well or the piping to be cased, a tube (1) including tube sections previously connected end to end, proceeding with the radial expansion of the tube using an inflatable bladder (3) so that the wall thereof bears against that (C) of the well or the piping; wherein the method is characterized in that the expansion is achieved not on the entire length of the tube but only at certain areas (4) thereof which are spaced from each other by non-expanded portions (5), so that the total length of the expanded areas (4) is substantially smaller than the total length of the non-expanded areas (5), the number of expanded areas (4) being at least equal to three. The invention can be used in the field of water or crude oil production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.