SU875003A1 - Device for automatic control of deep-well pumping unit of oil well - Google Patents

Description

(54) DEVICE FOR AUTOMATIC CONTROL OF DEEP-PUMP INSTALLATION OF OIL

The invention relates to oil production, and can be used to automatically control the operation of a deep well pumping installation of oil wells.

A device for automatically controlling the operation of an oil well pumping unit is known, comprising a force sensor, a pumping unit engine shut-off unit, an operation control unit whose outputs are connected to the inputs of a force sensor pulse counter, a pump cycle counter, and a pump incomplete cycle counter. , matching circuit, comparison circuit, zero latch and network voltage driver. The device automatically sets the accumulation time of the fluid, after which it turns on the electric motor of the pumping unit to work. By reducing the dynamic level of the fluid in the annulus WELLS

before receiving the pump, the device disconnects the pumping unit's motor from the network. Next, the device proceeds to the time delay for the accumulation of liquid and the IC1P1 repeats l 1

A disadvantage of the known device is that it does not allow controlling the operation of a deep-pumping unit during simultaneous-separate operation of oil reservoirs.

ten

A device is known for automatically controlling the operation of a deep-well pumping installation of oil wells while simultaneously operating separately, comprising a sensor, a constant voltage unit, a comparison unit, a voltage driver, a trip number counter, an input block, a counter of the number of outages, a time interval counter, scheme

20 match, output trigger and actuation relay.

Claims (2)

A disadvantage of the known device is that it does not allow 3 to detect faults occurring in the pumps during their operation. In addition, it does not make it possible to attribute problems to the upper or lower of the pumps. The purpose of the invention is to expand the functionality of the device. This goal is achieved by the fact that the device is equipped with an additional comparison unit, an additional time interval counter and two latches, with the output of the force sensor connected to the inputs of the latches, the outputs of which are respectively connected to the inputs of the control unit, one of the inputs of which is connected to the output of the additional comparison unit the other output of the control unit is connected to the output of the additional counter of the time interval, and the outputs of the main and additional counters of the time interval p Connected to the inputs of an additional comparison unit. The drawing shows a functional diagram of the proposed device. The device contains a force sensor 1, a constant voltage unit 2, a main comparison unit 3, a voltage former 4, a control unit 5, an input unit 6, a display unit 7, a trip number counter 8, a time counter main counter 9, circuits. 10-12 matches, output trigger 13, executive relay 14, first latch 15, second latch 16, additional time interval counter 17, additional b: lock 18 comparison. The device works as follows. Suppose that in the initial state both pumps (upper and lower) of the UGR deep pump installation are operating. Using the input unit 6, the device is launched and from the output of the 6 V unit. The control unit 5 receives a corresponding signal. The signal from the output of the sensor 1 effort simultaneously enters the input of the first latch 15 and the second latch G6. The first fixture 15 fixes the positive part of the force signal at zero level, and the second fixer 16 fixes the negative part of the signal force at zero level. At the moment of time when the positive pulse of the sensor of the sensor begins to exceed the zero level, the signal from the output of the control unit 5 is fed to the input of the additional counter 17 of the time interval, which is filled with the pulses from the output of the voltage driver 4. The filling of the counter 17 stops at the point in time when the positive part of the pulse of the force sensor decreases to zero level. Thus, the additional counter of the 17-time interval counts the length of the trailing edge of the force sensor pulse. In an additional comparison unit 18, a comparison is made of the values of the times of the indicated edges of the sensor pulses. If the duration of the fronts are equal, then this means that both pumps work normally, i.e. There are no malfunctions in their work. In this case, at the output of the additional block 18, the comparison signal produces a corresponding signal, which: after passing through the control block 5, enters the input of the display block 7, which informs about the normal operation of both pumps. If, however, the duration of the fronts are unequal, then this means that one of the pumps (upper or lower P is abnormal, i.e. there is a malfunction in their operation. In this case, the output of the additional comparison unit 18 produces the corresponding signal, which goes to block 5 control, then the control unit 5 generates a signal that goes to the display unit 7. The display unit 7 first informs about the existence of a fault in the pumps. Further, to detect a fault in the upper or lower pump, the control unit 5 is extracted This signal goes to the input of the output trigger 13, switches it, causing the actuating relay 14 to operate and disconnecting the pump-rocking motor from the mains. After the set time for the pump-rotor motor to stop, which is counted by the main counter 9 the time interval, at the output of the coincidence circuit 12, a pulse is generated, which is fed to the input of the output trigger 13, switches its initial state 6 and starts the machine electric motor Chalki. After that, during one period of operation of the submersible pump in the comparison unit 3, the signal received at the output of the force sensor 1 is compared with the voltage obtained at the code of the constant voltage unit 2. After the period of operation of the submersible pump, which is counted by the main counter 9 of the time interval, the output of the coincidence circuit 11 receives a pulse, which is fed to the control unit 5. In this case, if the Disable upper pump command is not executed and both pumps continue to work, then the output of the comparison unit 3 produces a signal that goes to the control unit 5 and the process of shutting down the deep pump installation is repeated up to a specified number N times. The number of shutdowns of the deep-pump installation is counted by the counter 8. When the contents of the counter 8 reach the number H, the output of the circuit 10 coincides with the signal that arrives at the control unit 5, which generates the signal that arrives at the display unit 7, the latter informs that the top pump does not work. When executing the Disable upper pump command, the output of the comparison unit 3 does not post a signal. In it . In this case, the device starts to check the serviceability of the lower pump. In this case, similarly to checking the health of both pumps, the signal from the output of sensor 1 of force simultaneously goes to the input of the first latch 15 and the second latch 16. Again, the first part of the latch 15 fixes the positive part of the force signal at zero level, and the second latch 16 fixes Significant part of the signal strength at the zero level. As a result, the duration of the leading edge of the pulse of the force sensor when operating only the lower pump is counted up again in the main counter 9 of the time interval, and in the additional counter 17 of the time interval counts: with the length of the rear edge of the pulse of the force sensor. In an additional comparison unit 18, their values are compared. If they are equal, it means that the lower pump is working normally, but there is a malfunction in the upper pump. This is indicated by the display unit 7. If they are not equal, then this means that there is a malfunction in the lower pump. This information also informs the display unit 7. The device is built on integrated circuits. Apparatus of the Invention A device for automatic control of a downhole pump installation of an oil well, comprising a force sensor, a constant voltage unit, a comparison unit, a trip number counter, a matching circuit, an output trigger, an actuating relay, an input unit, and a voltage driver that differs from that, in order to expand the functional capabilities of the device, it is equipped with an additional comparison unit, an additional counter for the time interval and two latches; ochi to the inputs of the latches, the outputs of which are respectively connected to the inputs of the control unit, one of which is connected to the output of the additional comparator unit, the other output of the control unit connected to the input of the additional counter of the time interval, and the output of the main and additional counters of the Time interval sravieii. Sources of information taken into account in the examination i 1. The author's certificate of the USSR 514945, cl. E 21 B 43/00, 1974. 2. USSR author's certificate according to application code 2648122/03, cl. E 21 B 47/00, 1978.