CN1162608C

CN1162608C - Intelligent driving device for well pumping unit

Info

Publication number: CN1162608C
Application number: CNB021100268A
Authority: CN
Inventors: 璜戈; 戈璜
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-22
Filing date: 2002-02-22
Publication date: 2004-08-18
Anticipated expiration: 2022-02-22
Also published as: CN1367305A

Abstract

The present invention provides an intelligent driving device for an oil pumping machine in an oilfield, which relates to a petroleum production device. The petroleum production device is composed of a three-phase main loop and a control loop thereof, wherein the main loop is connected in series with a circuit breaker 1, a circuit breaker 2, a power filter, an AC reactor and an AC servo controller. A position sensor is positioned on a shaft of a motor, and the control loop is composed of a converting switch, a control transformer and a control computer. Both ends of the AC servo controller are respectively connected with a normally open contact head group of an AC contactor 1, and the converting switch is also connected with a switching device. The main loop can also be connected in parallel with a soft starting controller, and both ends of the main loop are respectively connected with a normally open contact head group of an AC contactor 2, and can also be connected in parallel with a normally open contact head group of an AC contactor 3. The converting switch is also connected with coils of the AC contactor 1, the AC contactor 2 and the AC contactor 3. The present invention can use three loops for driving a motor of the oil pumping machine, has the advantages of high power factor, electric energy saving, high oil well yield, light abrasion and long service life of the oil pumping machine, and can be widely used for oil pumping machines in the oilfield.

Description

The intelligent drive device of oil-field oil pumper

Technical field

The present invention relates to Petroleum Production electromechanical assembly technical field, a kind of can real-time logic control being carried out in the work of oil pumper, or oil pumper is carried out the intelligent drive device that is used for oil-field oil pumper of network control of more clearly saying so according to the program of setting.

Background technology

As everyone knows, the reservoir geology situation is very complicated, and the topping up situation of oil well also is subjected to multiple factor affecting and constantly changes, so the operating rate of oil pumper should be able to be made corresponding change whenever and wherever possible, simultaneously, the balance weight of oil pumper is also wanted its position of corresponding adjustment.Yet present most oil well the drive unit that extensively adopts, system adopts the direct drive motors of power frequency supply, the operating rate of oil pumper is fixed, can't follow the variation of the geological condition of oil reservoir and make corresponding change, consequently: motor power factor is low, waste of energy is big, the serious wear of the low and oil pumper of oil well output.

Summary of the invention

Purpose of the present invention, just be to overcome above-mentioned shortcoming and defect, provide a kind of can be according to the program of setting, real-time logic control is carried out in work to oil pumper, or oil pumper carried out network control, the power factor height of motor, saves energy, oil well output height, and the intelligent drive device of the oil-field oil pumper that the wearing and tearing of oil pumper are light, grow application life.

In order to achieve the above object, the present invention is made of three-phase major loop and control loop thereof on the drive motors that is installed in oil pumper.Connecting successively on the major loop line breaker one, line breaker two, power-supply filter, AC reactor and AC servo controller.Also connecting position sensor between AC servo controller and the drive motors, position sensor is positioned on the axle of drive motors.Control loop is made up of the changeover switch on the two-phase between line breaker one that is connected the three-phase major loop and the line breaker two, the control computer that is connected on the control transformer on the changeover switch, the secondary windings that is connected control transformer and the AC servo controller.Exchange the normally open contact group that the servo controller two ends also can respectively connect an A.C. contactor one on the major loop, also connecting on the changeover switch can be by the computer-controlled switching device shifter that is used to switch the coil of connecting A.C. contactor one or A.C. contactor two of control, the soft start controller of also can and ining succession between the normally open contact group of AC reactor and A.C. contactor one and between the drive motors on the major loop, the soft start controller two ends are respectively connecting the normally open contact group of an A.C. contactor two.

Also can and in succession between line breaker one and the line breaker two and between the drive motors on the three-phase major loop normally open contact group of an A.C. contactor three, also connecting on the changeover switch can be by the computer-controlled switching device shifter that is used to switch the coil of connecting A.C. contactor one, A.C. contactor two or A.C. contactor three of control.Switching device shifter can also have MTS.

Soft start controller is made of the flip flop equipment that is connected bidirectional thyristor pressure regulator on the major loop and the speed regulator of being controlled by the position signalling input of given signal and position sensor, is connected also with speed regulator and then imports control bidirectional thyristor pressure regulator.

Operating principle of the present invention is: the duty of oil well (oily to expiring from the pump sky) is to survey by the variation of pumping-unit motor torque.So can be with the full oily duty of oil pumper as target, the control computer is judged the topping up state of oil well according to motor torque, instruct drive system to regulate the speed and the frequency of oil-extractor polish-rod uplink and downlink automatically according to the actual conditions of oil well in view of the above, make oil pumper be operated in full oil condition to greatest extent, can both realize the low consumption of giving stable high yields irrespective of drought or water logging thereby adopting of various oil drawn.In addition because the working environment of oil pumper is quite harsh, but oil pumper but must work highly reliably, so each part of system all must carry out high-level reliability design, has omnibearing self-protection function.The present invention's peculiar three loops design is greatly improved the reliability of system.Under the normal condition, the optimal case that drive unit is formulated according to program adopts AC servo to drive oil pumper automatically.If necessary, well station staff also can monitor the situation of oil pumper by the communication interface of control computer at any time.In particular cases; if control computer or servo-drive system break down; or the abnormal state of oil well own; system can both automatically switch to electrical network power frequency supply soft start or direct drive motors; or automatic stopping sends fault alarm information simultaneously; thereby avoided oil pumper because of the drive unit disorderly closedown, reduced the shutdown inspection time of oil well to greatest extent.

The present invention includes an embedded Control computer, a phase asynchronous induction conductivity, and the three drive circuit circuit that provide for this motor are provided.Thereby motor can be worked under three kinds of operational modes: (one) adopts the AC servo drive motors.(2) adopt the electrical network power frequency supply through the soft starting circuit drive motors.(3) adopt the direct drive motors of electrical network power frequency supply, three kinds of modes automatically switch according to programmed instruction.The control computer is embedded in servo-drive system inside.Operating personnel can also carry out telecommunication network control to oil pumper by the communication interface of device.

The bright characteristics of this law are to adopt three kinds of modes to drive phase asynchronous induction machine, since in the inner control computer run that embeds of AC servo intelligentized logic control software, so can adjust the upstroke of oil pumper and the speed and the frequency of down stroke automatically at the actual topping up degree of oil well.Its AC servo can be to rotating speed of motor, and torque and positional information are carried out accurate record, transmits and control.Phase asynchronous induction conductivity has been installed position sensor on the axle of motor.The embedded Control computer, operating personnel can directly utilize keyboard input program or the instruction of himself, also can utilize the communication interface and the host computer networking of servo-drive system, so that carry out remote monitoring.According to the instruction of control computer, three kinds of type of drive can automatically switch.

The present invention has following advantage: the servo-drive system power factor approaches 1, has reduced reactive loss, and power savings is remarkable; No matter start or brake, the acceleration, deceleration process of motor is adjustable arbitrarily, has really realized soft start and soft braking, thoroughly solves " low load with strong power " phenomenon; Oil pumper need not balancing; Well station control figureization, intellectuality, networking; Perfect self-protection function and warning function; Survey in real time automatically the actual load of oil well, and adjust the operating rate of oil pumper, the operational mode of the motor that automaticallyes switch in case of necessity automatically according to the variation of load.

Description of drawings

Fig. 1 is a functional-block diagram of the present invention.

Fig. 2 is the block diagram of its soft start controller.

Fig. 3 schematic circuit of the present invention.

Fig. 4 is a control program flow chart of the present invention.

The specific embodiment

The intelligent drive device of 1. 1 kinds of oil-field oil pumpers of embodiment, as shown in figures 1 and 3.It is made of three-phase major loop 1 and the control loop thereof on the drive motors that is installed in oil pumper.Connecting successively on the major loop line breaker 1, line breaker 23, power-supply filter 4, AC reactor 5 and AC servo controller 6.Also connecting position sensor 7 between AC servo controller 6 and the drive motors 8.Position sensor 7 is positioned on the axle of drive motors 8.Control loop is made up of the changeover switch 9 on the two-phase between line breaker 1 that is connected three-phase major loop 1 and the line breaker 23, the control computer 11 that is connected on the control transformer 10 on the changeover switch 9, the secondary windings that is connected control transformer 10 and the AC servo controller 6.

Embodiment 1 is the pattern that adopts the AC servo drive motors.That is under normal circumstances, the optimal case that drive unit is formulated according to program, control computer 11 by control loop passes through AC servo controller 6, drives drive motors 8 work of oil pumpers automatically through major loop 1, line breaker 1, line breaker 23, power-supply filter 4, AC reactor 5 and AC servo controller 6.Its duty is then detected by position sensor 7.If necessary, well station staff also can monitor the situation of oil pumper by the communication interface of control computer 11 at any time.

The intelligent drive device of 2. 1 kinds of oil-field oil pumpers of embodiment is consulted Fig. 1～Fig. 4.Exchange the normally open contact group 13 that servo controller 6 two ends are respectively connecting an A.C. contactor 1 on its major loop 1, also connecting on the changeover switch 9 can be by the switching device shifter 14 that is used to switch the coil of connecting A.C. contactor 1 or A.C. contactor 2 16 of control computer 11 controls, go back and the soft start controller 15 of ining succession between the normally open contact group 13 of AC reactor 5 and A.C. contactor 1 and between the drive motors 8 on the major loop 1, soft start controller 15 two ends are respectively connecting the normally open contact group 17 of an A.C. contactor 2 16.

Soft start controller 15 is made of the flip flop equipment 24 that is connected bidirectional thyristor pressure regulator 20 on the major loop 1 and the speed regulator of being controlled by position signalling 22 inputs of given signal 21 and position sensor 7 23, is connected also with speed regulator 23 and then imports control bidirectional thyristor pressure regulator 20.

Embodiment 2 adopts the pattern of electrical network power frequency supply through the soft starting circuit drive motors.That is in particular cases; if control computer or servo-drive system break down; or the abnormal state of oil well own; system can both automatically switch to electrical network power frequency supply soft start drive motors; or automatic stopping sends fault alarm information simultaneously; thereby avoided oil pumper because of the drive unit disorderly closedown, reduced the shutdown inspection time of oil well to greatest extent.Consult Fig. 2: this moment, electrical network power frequency supply major loop 1 drove the drive motors 8 of oil pumper by bidirectional thyristor pressure regulator 20.Its control then imports the speed regulator 23 of control by the position signalling 22 of given signal 21 and position sensor 7 and the flip flop equipment 24 of bidirectional thyristor pressure regulator 20 is finished.

The intelligent drive device of 3. 1 kinds of oil-field oil pumpers of embodiment is consulted Fig. 3.On its three-phase major loop 1 between line breaker 1 and the line breaker 23 and between the drive motors 8 also and the normally open contact group 19 of the A.C. contactor 3 18 of ining succession, connecting on the said changeover switch 9 can be by the switching device shifter 14 that is used to switch the coil of connecting A.C. contactor 1, A.C. contactor 2 16 or A.C. contactor 3 18 of control computer 11 controls.Switching device shifter 14 also has MTS.

Embodiment 3 is the patterns that adopt the direct drive motors of electrical network power frequency supply.That is in particular cases, if control computer or servo-drive system break down, or the abnormal state of oil well own, system can both automatically switch to the electrical network power frequency supply, by the normally open contact group 19 direct drive motors 8 of major loop 1 through line breaker 1 and A.C. contactor 3 18, or automatic stopping sends fault alarm information simultaneously.Its control is then finished by switching device shifter 14.Thereby avoided oil pumper because of the drive unit disorderly closedown, reduced the shutdown inspection time of oil well to greatest extent.

Three kinds of mode of operations automatically switch according to programmed instruction.The control computer is embedded in servo-drive system inside.Operating personnel can also carry out telecommunication network control to oil pumper by the communication interface of device.Fig. 4 shows control program flow process of the present invention.

Embodiment 1～3 can be with three kinds of mode activated pumping-unit motors, the power factor height, and saves energy, the oil well output height, the wearing and tearing of oil pumper are light, long service life.It can be widely used in the oil-field oil pumper.

Claims

1. the intelligent drive device of an oil-field oil pumper, it is made of three-phase major loop (1) and the control loop thereof on the drive motors that is installed in oil pumper, it is characterized in that the line breaker one (2) of connecting successively on the said major loop, line breaker two (3), power-supply filter (4), AC reactor (5) and AC servo controller (6), also connecting position sensor (7) between AC servo controller (6) and the drive motors (8), position sensor (7) is positioned on the axle of drive motors (8), and control loop is by the changeover switch (9) on the two-phase between line breaker one (2) that is connected three-phase major loop (1) and the line breaker two (3), be connected the control transformer (10) on the changeover switch (9), being connected the secondary windings of control transformer (10) and the control computer (11) on the AC servo controller (6) forms.

2. according to the intelligent drive device of the described oil-field oil pumper of claim 1, it is characterized in that said major loop (1) upward exchanges the normally open contact group (13) that servo controller (6) two ends are respectively connecting an A.C. contactor one (12), also connecting on the changeover switch (9) can be by the switching device shifter (14) that is used for switching the coil of connecting A.C. contactor one (12) or A.C. contactor two (16) of control computer (11) control, go back and the soft start controller (15) of ining succession between the normally open contact group (13) of AC reactor (5) and A.C. contactor one (12) and between the drive motors (8) on the major loop (1), soft start controller (15) two ends are respectively connecting the normally open contact group (17) of an A.C. contactor two (16).

3. according to the intelligent drive device of the described oil-field oil pumper of claim 2, it is characterized in that said three-phase major loop (1) go up between line breaker one (2) and the line breaker two (3) and between the drive motors (8) also and the normally open contact group (19) of the A.C. contactor three (18) of ining succession, connecting on the said changeover switch (9) can be by the switching device shifter (14) of the coil that is used for switching connection A.C. contactor one (12), A.C. contactor two (16) or A.C. contactor three (18) of control computer (11) control.

4. according to the intelligent drive device of the described oil-field oil pumper of claim 3, it is characterized in that said switching device shifter (14) also has MTS.

5. according to the intelligent drive device of the described oil-field oil pumper of any claim in claim 2 or 3 or 4, it is characterized in that said soft start controller (15) is made of the flip flop equipment (24) that is connected bidirectional thyristor pressure regulator (20) on the major loop (1) and the speed regulator of being controlled by position signalling (22) input of given signal (21) and position sensor (7) (23), is connected also with speed regulator (23) and then imports control bidirectional thyristor pressure regulator (20).