Hydraulic fluid supply apparatus and method for a downhole tool
US4378850A · kind A · utility
35Cited by
20References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1980 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Jun 13, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic fluid supply apparatus for a downhole tool includes a first annular zone adapted to be filled with hydraulic oil and a second annular zone adapted to be filled with a pressurized second fluid. The first and second zones are separated by a floating annular piston for transmitting fluid pressure from the second zone to the first zone. A control valve is connected between the first zone and a hydraulically powered component of the downhole tool for directing hydraulic fluid under pressure from the first zone to the hydraulically powered component of the downhole tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.