Title:
ELECTRO-HYDRAULIC PROCESS CONTROL SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO2006059223
Kind Code:
A3
Abstract:
A hybrid process control system features electrical transmission of power to a sub-sea hydraulic power unit (11), which in turn provides hydraulic power for control of hydraulic actuators. A circulation system using small bore tubing in the umbilical cord (3) in combination with a traditional topside hydraulic power unit (1) provides for active control of hydraulic fluid quality with respect to contamination caused by the sub-sea hydraulic actuators, especially process gas from down hole safety valves. Thus a more economical power transmission is achieved without reduction of fluid quality, which is essential to system integrity and reliability. Also a significant enhancement of power transmission without a dramatic increase in the size of hydraulic supply and return lines is achieved. Fluid environmental issues are reduced to a negligible aspect.
Inventors:
GRIMSETH TOM (NO)
BORCHGREVINK CHRISTIAN (NO)
BORCHGREVINK CHRISTIAN (NO)
Application Number:
PCT/IB2005/003659
Publication Date:
July 27, 2006
Filing Date:
December 02, 2005
Export Citation:
Assignee:
VETCO AIBEL AS (NO)
GRIMSETH TOM (NO)
BORCHGREVINK CHRISTIAN (NO)
GRIMSETH TOM (NO)
BORCHGREVINK CHRISTIAN (NO)
International Classes:
E21B33/035; E21B34/10
Domestic Patent References:
| WO2000001915A2 | 2000-01-13 | |||
| WO1991016523A1 | 1991-10-31 |
Foreign References:
| US20020040786A1 | 2002-04-11 | |||
| GB2266546A | 1993-11-03 |
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