SU947411A1 - Apparatus for automatic control of work of deep-well pumping installation of oil wells - Google Patents

Description

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

A device for controlling the operation of a submersible pumping unit is known, comprising a control unit for a pumping machine electric motor, a fluid filled compensator, a measuring device for determining the amount of fluid leakage between the plunger and the pump cylinder, a fitting for maintaining a constant level and pressure 1 in the compensator.

The disadvantage of the known device is that it is complicated in design. In addition, the process of controlling the operation of the downhole pumping unit and determining the actual capacity of the pumps in the device is not automated.

It is also known a device for automatically controlling the operation of a downhole pump installation of oil wells, comprising a liquid level sensor, a voltage driver, an input unit, a display unit, a control unit, a time interval counter, a logic unit, a first memory unit, an output trigger and an execution relay. In the known device, the outputs of the voltage driver and the input unit are connected to the inputs of the control unit, and the outputs of the control unit are connected to the inputs of the display unit, time counter, logic unit, first memory block and through the output trigger to the executive relay, liquid level sensor output simultaneously connected to the inputs of the control unit and the output trigger, the output of the logic unit is simultaneously connected to the inputs of the control unit and the first memory block, and the outputs of the first memory block and the temporary and the terminal is connected to the corresponding

20 inputs of logic block C

A disadvantage of the known device is that it does not allow to reduce the amount of leakage between the plunger and the pump cylinder, 25 which leads to a large loss of oil flow during the operation of deep-well wells under various pumping conditions.

The purpose of the invention is to increase the pump productivity by reducing the amount of fluid leakage between the cylinder and the plunger by determining the actual size of the gap between them and choosing a well with the appropriate parameters.

This goal is achieved in that the device is equipped with a comparison unit and a second memory unit, where one of the outputs of the control unit is connected to the input of the second memory unit whose output is connected to the input of the comparison unit, the other input of which is connected to the corresponding output of the logic unit the output of the comparison unit is connected to one and the inputs of the control unit.

The drawing shows a functional diagram of the proposed device.

The device contains a liquid level sensor 1, a voltage driver 2, an input block 3, an indication block 4, a control block 5, a time interval counter 6, a logic block 7, a first memory block 8, an output trigger 9, an executive relay 10, a second block 11 memories, block 12 comparisons.

The device works as follows.

To start the device in the input unit 3, the corresponding test button of the pump is pressed. In this case, from the output of the block 3 to the block 5 of the control, a signal is received about the testing of this pump. The control unit 5 generates a signal that the rocking motor is turned on. This signal is fed to the input of the output trigger 9 and switches it, as a result of which the actuating relay 10 is activated and switches on the pump-motor electric motor to the network. At the same time, the signal from the output of the control unit 5 is fed to the input of the time period counter b. In this case, the pulses from the output of the voltage driver 2, having passed through the block 5 ynpa of laziness, are fed to the input of the time interval counter b, i.e. counter b begins to count the time t of the pumping unit.

Sensor 1 detects the level of fluid accumulated from the leakage of fluid between the cylinder and the plunger of the test pump. When the liquid level reaches a predetermined value at the output of sensor 1, a signal appears that goes to the input of output trigger 9 and switches it, as a result of which the executive relay 10 is de-energized and the pumping unit's electric motor is disconnected from the mains. In addition, the signal from the output of sensor 1 enters control unit 5, as a result of which the latter generates a signal, and the contents of the counter of the time interval b,

those. the value of t is transmitted to the logic unit 7. At the same time, the control unit 5 generates a signal which is fed to the input of the first storage unit 8 of the memory. In this case, from the first memory block 8, the value is transferred to a logical block 7. A constant LL value corresponding to the fluid volume at a level equal to H, d, d.

In logic block 7, the daily leakage q of the fluid between the plunger and the cylinder of the test pump is determined based on the values of t and V. The value found is transmitted from the logic unit 7 to the memory unit 8 and to the display unit 4. Then, the control unit 5 generates a signal which is again fed to the input of the first memory unit 8. In this case, from the first memory block 8 to the logic block, 7, the values of q and constant coefficients of the test pump are transferred. On the basis of these data, the actual gap size between the cylinder and the plunger of the test pump is determined in logic flow 7 and is transmitted through control unit 5 to display unit 4. In addition, the found value is output from the logic block output (f is transmitted to one input of comparison unit 12, to the other input of which the binary code of the number corresponding to the upper limit of the first pump landing group, i.e. the number 70, is transmitted from the output of the second memory block 11.

then this means that the pump under test has the first number of the landing group. At the same time, a corresponding signal appears at the output of the comparator unit 12, which is transmitted through the control unit 5 to the display unit 4, and the latter shows the actual clearance gap rf and the actual number of the pump site group. If (f770, then this means that the pump under test has a second or third landing group number. To clarify the actual landing group number of the test pump, control unit 5 generates a signal that goes to the input of the second memory unit 11, while outputting the second unit 11 a binary code of the number corresponding to the upper limit of the second pump landing group, i.e. the number 120, is transmitted to the other input of the comparator unit 12. If (fiS 120, this means that the pump under test has the second number of the landing group. At the same time, block 12 with the corresponding signal appears, which is transmitted through the control unit 5 to the display unit 4, and the latter shows the actual clearance gap cf and the actual number of the pump landing group, if this means that the pump used has the third plant number 1 and. At the output of block 12, a corresponding signal appears, which, through control block 5, is transferred to display unit 4, which shows the actual value of the gap O and the actual number of the pump landing group. Next, from the first memory block 8, the values of daily leakage q and the coefficient of the tested pump are transferred to logic block 7. Based on these data, the actual performance of the test pump is also determined in logic block 7 and transmitted to indication block 4. Then control block 5 generates a signal that enters input of output trigger 9 and switches it, as a result actuating relay 10 is triggered; the pumping unit to the network and all the above described oLerations are repeated, i.e. The next pump is tested. Thus, the proposed device automatically determines the actual clearance of the gap between the cylinder and the plunger of the test pump, specifies the number of the pump fit group and determines the actual performance of the test pump. Based on these data, an optimal distribution of deep-well pumps in the field is made, depending on the properties of the pumped-out oil and the parameters of the deep-well pumping unit, which eliminates the loss of oil production and improves the well productivity. The proposed device is characterized by high operational reliability. The device for automatic control of the operation of a deep-well pumping installation of oil wells, comprising a control unit, the inputs of which are connected to the output of the voltage generator and the input unit, and the outputs of the control unit are connected to the inputs of the display unit, time counter, logical unit, first memory unit and through the output trigger to the executive relay, the output of the liquid level sensor is simultaneously connected to the inputs of the control unit and the output trigger, the output of the logic unit simultaneously It is connected to the inputs of the control unit and the first memory block, and the outputs of the first memory block and the time interval counter are connected to the corresponding inputs of the logic block, characterized in that in order to increase the pump performance, a comparison block and a second memory block are entered into it, one of the outputs of the control unit is connected to the input of the second memory unit, the output of which is connected to the input of the comparison unit, the other input of which is connected to the corresponding output of the logic unit, and the output of the comparison unit is connected to one of the inputs of the control unit. Sources of information taken into account in the examination 1. Pyrverd A.M. Hydromechanics of deep-pumping operation, m .. Nedra, 1965, p. 60-63. 2. USSR Author's Certificate of Application No. 2851029, cl. E 21 B 43/00, 1979..

Claims (1)

Claim A device for automatically controlling the operation of a deep-pumping oil well installation, comprising a control unit, to the inputs of which the output of a voltage driver and an input unit are connected, and the outputs of the control unit are connected to the inputs of an indication unit, a time interval counter, a logical unit, a first memory unit, and through an output trigger - to the executive relay, the output of the liquid level sensor is simultaneously connected to the inputs of the exercise block and the output trigger, the output of the logic block is simultaneously connected to the input m of the control unit and the first memory unit, and the outputs of the first memory unit and the counter of the time interval are connected to the corresponding inputs of the logical unit, characterized in that, in order to increase pump performance, a comparison unit and a second memory unit are introduced into it, where one of the outputs of the unit control is connected to the input of the second memory block, the output of which is connected to the input of the comparison unit, the other input of which is connected to the corresponding output of the logical unit, and the output of the comparison unit is connected to one of the inputs eye control.