Pump-off control

Details Pump-off control Pump-off control

1986-11-20

1989-10-10

Smith, Jerry

Boots, shoes, and leggings

73151, 417 12, F04B 4900

Patent

active

048736350

ABSTRACT:
A pump-off controll device for controlling a pumpjack unit. The device measures the length of time required for the pump to downstroke successive numbers of times, and when the time differential reaches a predetermined value, the well is shut-in for a time interval.

REFERENCES:
patent: 3817094 (1974-06-01), Montgomery et al.
patent: 3838597 (1974-10-01), Montgomery
patent: 3851995 (1974-12-01), Mills
patent: 3930752 (1976-01-01), Douglas
patent: 3936231 (1976-02-01), Douglas
patent: 3951209 (1976-04-01), Gibbs
patent: 4363605 (1982-12-01), Mills
patent: 4487061 (1984-12-01), McTamaney
patent: 4490094 (1984-12-01), Gibbs
patent: 4631954 (1986-12-01), Mills

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