Method and apparatus for isolating a zone of wellbore and extracting a fluid therefrom
US5242022A · kind A · utility
17Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Aug 5, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for isolating a zone (12) of a wellbore (14) penetrated by a casing (16) and then opening ports (28) in the zone (12) for extraction or injection of fluids is provided. The zone (12) is isolated by inflating jackets (42) and then closing a safety valve (38) by sliding a sliding member (44) relative to a first conduit (46). The ports (28) are opened by sliding a piston (80) of a sliding sleeve valve (76) so that openings (84) therein align with the ports (28). The invention provides improved zone isolation and reduced wear of seals (86) in the sliding sleeve valve (76).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.