Method and apparatus for controlling elastomer swelling in downhole applications
US7938191B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2008 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Oct 24, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool includes a swellable core, and a coating that encapsulates the swellable core, wherein the coating is made of a material comprising a component soluble in a selected fluid and a component insoluble in the selected fluid. A method for controlling a downhole tool includes disposing a downhole tool in a wellbore, wherein the downhole tool includes a swellable core, and a coating that encapsulates the swellable core, wherein the coating is made of a material comprising a component soluble in a selected fluid and a component insoluble in the selected fluid; and exposing the swellable device to the selected fluid to increase the permeability of the coating to allow the swellable core to swell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.