Electrically actuated safety valve for a subterranean well
This patent describes an apparatus for shifting a downhole tool axially shiftably mounted in a subterranean well conduit for movement between an initial and a second piston comprising, in combination: an axially extending actuator connected at one end to the downhole tool; resilient means opposing axial movement of the actuator in the direction away from the initial position; peripheral abutment means on the actuator; shifting means disposed adjacent the actuator; an axial force transmitting member in operative engagement with the shifting means; means for mounting the force transmitting member for nonrotatable axial movement relative to the conduit; and electric motor fixedly mounted in the conduit; and threaded means rotatable by the electric motor and threadably engagable with the force transmitting member to axially shift the shifting means and the actuator in the direction opposed by the resilient means and thereby position the downhole tool in the second position.
- Assignee:
- Baker Hughes Inc., Houston, TX
- Patent Number(s):
- US 4796708
- OSTI ID:
- 6059847
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
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CONTROL EQUIPMENT
CONTROL SYSTEMS
DUCTS
ELECTRIC BATTERIES
ELECTRIC MOTORS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
EQUIPMENT
FLOW REGULATORS
MACHINE PARTS
MATERIALS HANDLING EQUIPMENT
MOTORS
NATURAL GAS WELLS
OIL WELLS
OPERATION
POSITIONING
RELIEF VALVES
SPRINGS
TOOLS
VALVES
WELLS