Pneumatic pump actuator for oil wells
This patent describes a pneumatic pump actuator. It comprises a power cylinder having a sucker rod passing therethrough; a piston mounted to the sucker rod for reciprocation inside the power cylinder; means for selectively routing relatively high pressure air or gas into the power cylinder on a first and both the first and a second side of the piston; a floating piston bleeder valve shiftable from a first to a second piston and back to the first position for supplying air or gas to the routing means and on to the first or the first and second sides of the piston; first and second pivot arms mounted near the ends of the bleeder valve; first and second activator buttons on the ends of the bleeder valve for shifting the bleeder valve when engaged by the respective first and second pivot arms from the first position to the second position and back to the first position; first and second contactors.
- Assignee:
- NOV; NOV-91-042009; EDB-92-055504
- Patent Number(s):
- US 5031402; A
- Application Number:
- PPN: US 7-561954
- OSTI ID:
- 5573044
- Resource Relation:
- Patent File Date: 2 Aug 1990
- Country of Publication:
- United States
- Language:
- English
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