Fluid level control system

Details Fluid level control system Fluid level control system

2004-07-09

2008-01-08

Koczo, Jr., Michael (Department: 3746)

Pumps

Condition responsive control of pump drive motor

In response to pump speed

C417S044100, C417S053000

Reexamination Certificate

active

07316542

ABSTRACT:
A control system governs fluid level in a well system including a pump positioned downhole for pumping fluid upward through a tubular, a rod positioned within the tubular for driving the pump, a prime mover, and a pumpjack to transmit power from the prime mover to the rod to reciprocate the rod. A sensor senses a position of the rod or a member of the pumpjack and outputting signals in response thereto. A controller receives the signals and computes a plurality of time intervals, each time interval being between signals and occurring during at least a portion of an upstroke of the rod. The controller selectively decreases power output from the prime mover in response to an increase in the computed time interval.

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