Monitoring pump stroke for minimizing pump-off state

Details Monitoring pump stroke for minimizing pump-off state Monitoring pump stroke for minimizing pump-off state

1993-10-22

1995-10-17

Bennett, Henry A.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 18, 417 42, 417 441, 417 53, F04B 4900

Patent

active

054584663

ABSTRACT:
Fluid pounding in a pumpjack is minimized by dictating the length of the run cycles of the pumpjack. The pumpjack is first allowed to pump down until a fluid pounding state is reached, at which time it is shut down. The time it takes to reach this state is monitored. Using the length of time it took to reach the fluid pounding state, the pumpjack is set to run a predetermined number of dictated cycles for a length of time which is 70-99% of the time it took to reach the fluid pounding state. During these predetermined number of cycles if the pumpjack again reaches a fluid pounding state the time is reset based on this new information, and the number of predetermined number of dictated cycles left is finished. After the predetermined number of cycles has finished, the process is repeated by allowing the pumpjack to run to a fluid pounding state.

REFERENCES:
patent: 3930752 (1976-01-01), Douglas
patent: 3936231 (1976-02-01), Douglas
patent: 3998568 (1976-12-01), Hynd
patent: 4487061 (1984-12-01), McTamaney et al.
patent: 4507055 (1985-03-01), Fair et al.
patent: 4583915 (1986-04-01), Montgomery et al.
patent: 4873635 (1989-10-01), Mills
patent: 5064349 (1991-11-01), Turner et al.
patent: 5224834 (1993-07-01), Westerman et al.
patent: 5314016 (1994-05-01), Dunham

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