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US 5,382,142 AGranted
Wall pump having backwash valve actuator
AssigneeSpears Speciality Oil Tools, Inc.
InventorHarry L. Spears
Life of this patent
Estimating the term…
Abstract
A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained.
Claims21
A backwash valve actuator, for use in a sucker-rod actuated fluid pump disposed in a length of tubing, the pump having:
- a pump barrel with upper and lower ends, a moveable piston, with upper and lower ends, disposed within the pump barrel;
- a traveling valve assembly, including a first valve seat and a first ball valve, connected to the lower end of the moveable piston;
- and a standing valve assembly, including a second valve seat and a second ball valve disposed at the lower end of the pump barrel, comprising:
- a traveling ball valve actuator for selective engagement with the first ball valve of the traveling valve assembly to selectively unseat the first ball valve from the first valve seat;
- a standing ball valve actuator for selective engagement with the second ball valve of the standing ball valve assembly to selectively unseat the second ball valve from the second valve seat;
- control means for selectively actuating the standing ball valve actuator to engage the second ball valve when it is desired to unseat the second ball valve from the second valve seat;
- and
- means for connecting the standing ball valve actuator, traveling ball valve actuator, and control means to the lower end of the pump barrel, including a tubular shaped member having a first threaded surface upon selective, substantially simultaneous actuation of the standing ball and traveling ball valve actuators, any fluid contained in the pump and length of tubing may flow downwardly through, and outwardly from, the length of tubing and pump.
5 more elements
A fluid pump adapted to be disposed in a length of tubing for pumping a fluid upwardly through the length of tubing, comprising:
- a pump barrel with upper and lower ends;
- a moveable piston, with upper and lower ends, disposed within the pump barrel;
- a traveling valve assembly, including a first valve seat and a first ball valve, connected to the lower end of the moveable piston;
- a standing valve assembly, including a second valve seat and a second ball valve disposed at the lower end of the pump barrel;
- and
- a backwash valve actuator disposed in the lower end of the pump barrel and assembly, the backwash valve including:
- a traveling ball valve actuator for selective engagement with the first ball valve of the traveling valve assembly to selectively unseat the first ball valve from the first valve seat;
- a standing ball valve actuator for selective engagement with the second ball valve of the standing ball valve assembly to selectively unseat the second ball valve from the second valve seat;
- control means for selectively actuating the standing ball valve actuator to engage the second ball valve when it is desired to unseat the second ball valve from the second valve seat;
- and means for connecting the standing ball valve actuator, traveling ball valve actuator, and control means to the lower end of the pump barrel, including a tubular shaped member having a first threaded surface which threadedly mates with the lower end of the pump barrel, whereby upon selective, substantially simultaneous actuation of the standing ball and traveling ball valve actuators, any fluid contained in the pump and length of tubing may flow downwardly through, and outwardly from, the length of tubing and pump.
7 more elements
Dependencies are inferred from the claim text.