Electric and electro-hydraulic control systems for subsea and re

Details Electric and electro-hydraulic control systems for subsea and re Electric and electro-hydraulic control systems for subsea and re

1990-06-08

1992-11-24

Eldred, J. Woodrow

Communications: electrical

Wellbore telemetering or control

Selective control of subsurface equipment

166335, 166363, 166 651, G01V 100

Patent

active

051666774

ABSTRACT:
An electro-hydraulic control system for subsea wellheads provides a water tight housing carrying therewithin an electric motor drive which operates a valve that is positioned adjacent but outside the water tight housing. A high ratio gear box within the water tight housing interfaces the motor drive and the valve while maintaining the flow control position of the valve such as open flow, closed flow, or incremental flow opening positions of the valving member. A dual tone multi-frequency controller activates the electric motor drive using a key pad at a remote location so that both operation of the valve and an indication of valve position can be achieved from the remote location.

REFERENCES:
patent: 4461450 (1984-07-01), Soland et al.
patent: 4757314 (1988-07-01), Aubin et al.
patent: 4796708 (1989-01-01), Lembcke

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