Apparatus for controlling a pumpjack prime mover

Details Apparatus for controlling a pumpjack prime mover Apparatus for controlling a pumpjack prime mover

1984-07-25

1986-12-30

Birmiel, Howard A.

Measuring and testing

Borehole or drilling

Downhole test

166250, 417 12, 417 18, F04B 4900, E21B 4400

Patent

active

046319549

ABSTRACT:
An improved pump control having a device for measuring relative movement between structural components of a pumpjack unit, and converting the movement into a signal which varies according to the magnitude of the movement. The signal is divided into an upstroke and downstroke component so that during one cycle of the pumping operation, the downstroke part of the signal can be analyzed. A selected part of the downstroke signal can be used to indicate a pump-off condition. The entire signal can also be treated to provide a plot having characteristics similar to a dynamometer card. The disclosure further sets forth a motion sensor which measures the characteristics of the motion induced into the pumpjack structure and provides a signal which can be used to shut-in the well each time a pump-off condition is reached by the bottom hole pump.

REFERENCES:
patent: 3926047 (1975-12-01), Duke et al.
patent: 3951209 (1976-04-01), Gibbs
patent: 4286925 (1981-09-01), Standish
patent: 4363605 (1982-12-01), Mills
patent: 4487061 (1984-12-01), McTamaney et al.

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