Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1980-09-15
1984-09-25
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
307141, 318447, 318484, 417 44, 417 63, F04B 4900
Patent
active
044733380
ABSTRACT:
In a well such as an oil well, a timer connects a power source to the motor which drives the well pump for timed energization and de-energization periods. The timer consists of an electronic programmable timer having a stored program data processor for processing digital information and with capabilities to variably enter time program data into the processor to selectively energize and de-energize the pump motor for any desired time intervals for each day and the time intervals for each day of the week may be programmed differently. When the pump motor is provided in the form of an electric motor, a power transducer is connected to the power source energizing the motor to continually monitor line voltage and current and provide a true power output signal representative of the phase angle between the line voltage and line current. The power supplied to the pump motor is switched off when the wave form of this true power signal attains preselected minimum or maximum peak values corresponding respectively to when the well is pumped off or the pump motor is overloaded. This true power output signal can be further analyzed by a computer programmed to analyze the wave form in relation to well production to provide well production analysis results.
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