Actuation method

Details Actuation method Actuation method

1988-04-14

1989-10-31

Steinberger, Brian S.

Communications: electrical

Wellbore telemetering or control

Selective control of subsurface equipment

340855, 340861, 166 664, G01V 140

Patent

active

048780537

ABSTRACT:
A subsurface valve-actuator combination for well production tubing is described. The valve is urged to closed position but held open by a battery-operated latch of the actuator. A receiver-relay in the battery-actuator circuit maintains a switch closed to permit the latch to be energized as long as the receiver-relay receives an electromagnetic signal transmitted from the earth's surface. The latch is deenergized upon interruption of the signal and/or if the battery power is insufficient to energize the same.

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