Process and device for hydraulically and selectively controlling at least two tools or instruments of a valve device allowing implementation of the method of using said device
US4945995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process and device for hydraulically and selectively controlling, in two circulation directions, at least two tools or instruments connected to a casing located inside a well. A first hydraulic line is provided which includes branches to a first and a second of the two tools or instruments, with a distribution arrangement being adapted to modify a circulation of fluid in each of the branches and to enable an independent control, and with a hydraulic power generator being connected to the first hydraulic line. To selectively activate the first tool or instrument, the distribution arrangement of the second tool or instrument are shut off in order to reduce fluid circulation in the branch of the second tool or instrument, the distribution arrangement of the first tool or instrument are opened in order to increase fluid circulation of the branch of the first tool or instrument, and pressure is applied in the first hydraulic line in order to create a flow of fluid in the first direction in the branch of the first tool or instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.