CN2858943Y

CN2858943Y - Differential balance pressure oil pump

Info

Publication number: CN2858943Y
Application number: CN 200520121935
Authority: CN
Inventors: 陈德义; 张跃俭
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-22
Filing date: 2005-09-22
Publication date: 2007-01-17
Anticipated expiration: 2015-09-22

Abstract

A differential balance pressure oil pump comprising a driver wheel and a walking beam. Said driver wheel is provided with a linear motor thereon, and on the rotor of the motor is mounted with a balance iron. Said driver wheel is transmission connected with a driven wheel on the flywheel axial of a steady speed generator axle by a transmission belt. The utility model overcomes the disadvantages of traditional oil pumps, alters the drive transmission mode of traditional walking beam oil pumps, changes pull-driven to be press-driven and abolishes speed reducer. It uses a singlechip for auto-control which is capable of altering stroke frequency according to the oil viscosity, conditions of liquid level and pressure, adjusting to balance state automatically and responding to well stuck and paraffin hanging etc. Thereby the trouble can be dealt with in time and the loss can be reduced. The utility model has advantages of low operation expenses, easy use, flexibility, and great intelligence. It realizes mechanical and electrical integration and mutual transformation of mechanical energy and electric energy, and is the perfect embodiment of repeated mutual use of energy in motion which is reasonable and artful.

Description

Differential balance pressure oil-pumping unit

Technical field

The utility model relates to a kind of oil exploration equipment, specifically is a kind of differential balance pressure oil-pumping unit.

Background technology

Oil pumper is the capital equipment of Petroleum Production, what be most widely used at present is beam pumping unit, its groundwork principle is: by motor as the major impetus source, reduce through the rotating speed of reductor motor output, the torque raising after rocking arm, link rod change rotatablely moving of motor into linear reciprocating motion, crude oil is extracted in the work of drive oil well pump out, and this machine has following several shortcoming:

1, the axis of walking beam is the strong point, the balance of oil pumper is the balance of the gravity at walking beam two ends, because balance weight iron is contained on the rocking arm of speed reducer output shaft; rocking arm is when moving in a circle; make the gravity that acts on the walking beam tailing axle be subjected to the decomposition of speed reducer output shaft; can not all act on the tailing axle; exist the overweight and counterweight of counterweight two points that kick the beam simultaneously; the former makes motor produce dynamic brake; it is excessive that the latter makes motor exert oneself again, makes oil pumper can't realize gravitational equilibrium completely forever, will leave enough big surplus during the supporting use of motor and oil pumper; such as actual needs power is 5KW; the power of adapted motor must be 30KW or 37KW just, makes the motor long-term work in light condition, causes the power factor and the inefficiency of motor; taken a large amount of reactive powers; far away owing to transmission distance, the working time is long, has also consumed a large amount of loss on transmissions and line loss; cause used for oil extractor electric system efficient low, the producing cost height in 360 ℃.

2, because the difference of underground working, oil pumper should be able to arbitrarily be adjusted jig frequency according to underground working, changing jig frequency mainly is the rotating speed that changes drive motors, the most frequently used method is to adopt grade adjustable speed motor and frequency converter at present, the former motor own loss is big, and efficient and power factor are all very low, can not stepless speed regulation, the latter invests greatly, the cost height.

3, the oil pumper technology content of modern Application is lower, can not gather, analyze, handle underground working automatically or adjust balance and jig frequency automatically according to hole condition, can not change stroke.

Summary of the invention

The purpose of this utility model just provides a kind of differential balance pressure oil-pumping unit, can't realize gravitational equilibrium completely with the oil pumper that the solution prior art exists, will leave enough big surplus during the supporting use of motor and oil pumper, the power factor of motor and inefficiency have taken a large amount of reactive powers, because transmission distance is far away, working time is long, consume a large amount of loss on transmissions and line loss, caused used for oil extractor electric system efficient low, the producing cost height; Change jig frequency and adopt grade adjustable speed motor and frequency converter, the motor own loss is big, and efficient and power factor are very low, can not stepless speed regulation, and investment is big, the cost height; Can not gather, analyze, handle underground working automatically or adjust balance and jig frequency automatically, can not change the problem of stroke according to hole condition.

The technical solution of the utility model is: comprise motor, driving wheel, rocking arm, link rod, walking beam, counterweight, horse head, sucker rod and derrick, driving wheel is connected on the output shaft of motor; rocking arm radially is connected on the driving wheel, and the two ends of link rod are hinged with an end of the placement counterweight of the outer end of rocking arm and walking beam respectively; The middle part of walking beam is hinged on the top of derrick, and the upper end of horse head and sucker rod that is positioned at the other end of walking beam is hinged, and it is characterized in that: installation one straight line motor on described walking beam adds balance iron on the mover of these linear electric motors; Described driving wheel is in transmission connection by the driven pulley of the flywheel on a driving-belt and the speed stabilizing generator shaft.

Also comprise control system, this control system comprises rotating-speed control circuit, electromotor control circuit and voltage thereof and speed feedback circuit, wax removal and warning indication and the Ka Jing and the warning indicating circuit of controller and the data setting device that is connected with its each input port, oil surface sensor, pipe pressure sensor, position sensor, linear motor rotor drive circuit, speed stabilizing generator, and the output of linear motor rotor drive circuit is connected with described linear electric motors.

Described controller can adopt single-chip microcomputer or programmable logic controller PLC.

Described linear motor stator electric iron core adopts the monolateral or double-flanged end structure of Ru-Fe-Mn permanent magnet, and mover adopts three-phase step-by-step movement structure; These linear electric motors have the duplex feeding power supply, one tunnel excitation field of supplying with these linear electric motors and described speed stabilizing generator behind 50HZ power frequency supply rectifying and wave-filtering wherein, another road is supplied with these linear electric motors with the three-phase alternating current electric rectification filter that the speed stabilizing generator sends after voltage adjuster feeds back simultaneously.

After taking technique scheme, the utility model has overcome the drawback of traditional oil pumper, changed the power transmission mode of traditional beam-pumping unit, change pulling for pressing, the cancellation reductor adopts single-chip microcomputer to control automatically, can be according to the viscosity of oil, and liquid level, operating modes such as pressure change jig frequency automatically, automatically adjust balance,, hang phenomenon such as cured and react Ka Jing, fault is in time handled, reduce the loss, because energy is a conservation, this machine has rationally utilized the mutual conversion between energy cleverly and has utilized mutually, make electric energy be converted to mechanical energy, mechanical energy can be converted to electric energy again.In sum, this machine operating cost is low, easy to use, flexibly, intelligent degree height, electromechanical is that electric energy is converted to mechanical energy, mechanical energy is converted to electric energy, makes energy rationally repeat cleverly at the volley to utilize mutually to have obtained perfect embodiment.

Description of drawings

Fig. 1 is a general structure schematic diagram of the present utility model;

Fig. 2 be among Fig. 1 A to view;

Fig. 3 is the axial cross-sectional schematic of linear electric motors of the present utility model;

Fig. 4 is the structural representation that installs balance iron among Fig. 3 additional;

Fig. 5 is a control system circuit block diagram of the present utility model.

The specific embodiment

Referring to Fig. 1～Fig. 5, the utility model comprises motor 12, driving wheel 11, rocking arm 10, link rod 9, walking beam 5, counterweight 6, horse head 1, sucker rod 7, derrick 8, linear electric motors 2 and speed stabilizing generator 17.Driving wheel 11 is connected on the output shaft of motor 12, and rocking arm 10 radially is connected on the driving wheel 11, and the two ends of link rod 9 are hinged with an end of the placement counterweight 6 of the outer end of rocking arm 10 and walking beam 5 respectively.The middle part approximately of walking beam 5 is hinged on the top of derrick 8, and the horse head 1 that is positioned at the other end of walking beam 5 is connected according to a conventional method with the upper end of sucker rod 7.Adding balance iron 3 on the mover 23 of fixed installation linear electric motors 2,2 at these linear electric motors on the described walking beam 5.Outside linear electric motors 2 and balance iron 3, protective cover 4 is installed.Described driving wheel 11 is in transmission connection by the driven pulley 16 in flywheel 14 axle center on 17 in driving-belt 13 and the speed stabilizing generator.

Described linear electric motors 2 are permanent-magnetism linear motor, and its stator core 21 adopts the monolateral or double-flanged end structure of Ru-Fe-Mn permanent magnet, and mover 23 adopts three-phase step-by-step movement structure.These linear electric motors 2 have the duplex feeding power supply, one tunnel excitation field of supplying with these linear electric motors and described speed stabilizing generator behind 50HZ power frequency supply rectifying and wave-filtering wherein, another road is supplied with these linear electric motors with the three-phase alternating current electric rectification filter that the speed stabilizing generator sends after voltage adjuster feeds back simultaneously.

Referring to Fig. 5, the utility model disposes control system, this control system comprises controller (CPU) and the stroke that is connected with its each input port and jig frequency data setting keyboard A and B, oil surface sensor C, pipeline pressure (back pressure) sensor D, position sensor 19, linear motor rotor drive circuit F, speed stabilizing generator speed control system circuit G, electromotor control circuit E and voltage thereof and speed feedback circuit K, wax removal and warning indicating circuit L and Ka Jing and warning indicating circuit M, and the output of linear motor rotor drive circuit F is connected with described linear motor rotor 3.Position sensor 19 is installed near the walking beam 5 of counterweight 6, is used to detect the position that balance iron 3 moves.

Described controller can adopt single-chip microcomputer (CPU) or employing programmable logic controller PLC is direct and each sensor connects and composes with the control object.

Operating principle of the present utility model is as follows:

One, mechanical movement system principle:

Increase or reduce the weight of counterweight 6, make the two ends balance of walking beam 5, the mover 23 (being balance iron 3) of permanent-magnetism linear motor 2 is moved to the left or to the right, require to set the speed of service of mover 23 according to jig frequency, when mover 23 self gravitations were broken the gravitational equilibrium at walking beam two ends, 5 of the walking beams of mover 23 places one side moved downward; As the gravity of counterweight 6 gravity greater than horse head 1, the counterweight end of walking beam 5 moves downward, horse head 1 drives sucker rod 7 and moves upward, link rod 9 promotes rocking arm 10 and is rotated down, because rocking arm 10 and driving wheel 11 coaxial and synchronous rotations, 13 of driving belts on the driving wheel 11 drive driven pulley 16 rotation at a high speed (rotating ratio of generally selecting driving wheel 11 and driven pulley 16 was greater than 1: 10), this energy is stored by flywheel 14, and making speed stabilizing generator 17 brake power generating speed stabilizings, the electric energy that sends is given linear electric motors 2 after rectification.When horse head 1 is about to arrive top dead centre, permanent magnetic linear synchronous motor 2 moves fast round about, when rocking arm reaches lower dead center, when horse head 1 reaches top dead centre, the flywheel 14 of rotation drives driving wheel 11 continuation motions (effect of inertia) through driven pulley 16, belt 13 at a high speed, and energy stored is fed back to driving wheel.This moment, the mover 23 of permanent-magnetism linear motor 2 reached horse head 1 one ends, the gravity that makes horse head 1 end is greater than counterweight one end; rocking arm 10 is crossed lower dead center; horse head 1 drives sucker rod and moves downwards; rocking arm 10 rotate to top dead centre; driving wheel 11 drives driven pulley 16 rotations again; and energy continued to pass to flywheel 14, flywheel 14 has obtained energy again, changes the magnetic field intensity of speed stabilizing generator 17; can control the rotating speed of flywheel 14 and return the feedback generated energy; when horse head 1 begins to move downward, and the mover of linear electric motors 2 begins to move to the counterweight extreme direction, when horse head 1 reaches lower dead center; system repeats the above-mentioned course of work, and oil pumper just brings into operation like this.

Two, the permanent-magnetism linear motor of pressure oil pumper and electric power system

Its power supply is duplex feeding, and one the tunnel supplies with the excitation field of linear electric motors 2 and speed stabilizing generator 17 behind 50Hz power frequency supply rectifying and wave-filtering.Another road is supplied with linear electric motors 2 with the three-phase alternating current electric rectification filter that speed stabilizing generator 17 sends after voltage adjuster feeds back simultaneously, makes energy obtain recycling.The stator 21 of linear electric motors 2 is fixed on the walking beam 5 with the slideway 22 of mover 23, installs balance iron 3 on the mover 23 additional, comes and goes operation after fixing on slideway 22.Change the speed of service of mover and the rotating speed of range ability and speed stabilizing generator 17, can change the jig frequency of oil pumper.Adjust the tie-point of link rod 9 and rocking arm 10, can change stroke.The unnecessary electric weight of three-phase that speed stabilizing generator 17 utilizes the effect of inertia of oil pumper operation to send can be used for well head heating, night illumination etc.

Three, the control system of differential balance pressure oil-pumping unit and operating principle thereof

Referring to Fig. 5; control system of the present utility model adopts Single-chip Controlling; this single-chip microcomputer has the multichannel interface; signals such as oil temperature, the liquid level of down-hole, oil pressure, pipeline pressure can be defeated by computer (CPU) by the program of having finished; making it can change linear electric motors 2 operations according to the variation of hole condition automatically turns back a little and the speed of service; and can adjust according to speed stabilizing generator speed and output voltage; controlling magnetic field intensity; thereby the jig frequency of decision oil pumper; and to Ka Jing, hang phenomenon of the failure such as cured and in time report to the police, and by the procedure auto-control of having finished, shutdown etc.

1, after oil pumper installs, the mover 23 of linear electric motors (adjusting iron 3) placed axis place (being walking beam and derrick junction), the balance weight iron at plus-minus tailing axle place (being the end that walking beam 5 has counterweight) to make to hang and the tailing axle balance of trying one's best.

2, require to determine to add on the mover stroke of the weight of adjusting iron 3 and setting mover according to stroke and jig frequency and turn back a little, it is proportional relationship that the long mover stroke of stroke should be grown, the mover stroke is an inversely prroportional relationship with installing adjustment iron weight additional, weight is big, stroke is short, and stroke in light weight is long, and the pass of jig frequency and stroke is that the jig frequency high-stroke is short, the low stroke of jig frequency is long, needs to set up at the scene.

3, the control circuit E of motor of oil extractor 12 can adopt the control mode of multiple routine, as adopting the control mode of three-phase stepper motor, also can adopt the control of brushless direct-current variable voltage control.

Now be explained as follows with the direct current voltage reulation mode of speed regulation: walking beam 5 when moving reciprocatingly and support 8 produce certain included angle, according to the difference of stroke, its top dead centre and lower dead center are different with the angle of support 8, are zero degree with walking beam 5 horizons.If top dead centre is 45 °, then lower dead center is-45 °.Controller is according to jig frequency, the stroke of oil pumper, and the equilibrium state of oil pumper, determines that linear electric motors 2 counter motion starting points are determined in walking beam 5 present positions when oil pumper is up, descending.If oil thick, hang phenomenon such as cured and can make and hung when up vertically, counterweight kicks the beam, equalization point originally will change linear electric motors drive adjustment iron 3 to the motion for line of tailing axle (being counterweight 6 one ends) direction apart from prolonging.When tailing axle stresses power greater than suspending side, walking beam 5 moves to position sensor 19 places by lower dead center to top dead centre, and the latter is to controller 18 output counter motion signals, controller 18 control linear electric motors 2 and mover (balance iron 3) counter motions.

It is much bigger to hang the gravity of cured phenomenon when thicker than oil.According to hanging cured tolerance level, on tailing axle lateral movement distance, install extension cured protection sensor 20 (referring to Fig. 1) additional at linear electric motors 2, and this signal is passed to single-chip microcomputer.Cured clearly by the automatic water filling of Single-chip Controlling.Or adopt the clear cured measure that waits of heating, can set the automatic clear cured time.But Auto Power On moves after reaching the time.

Ka Jing is meant that oil well pump or suspension are stuck.Balance iron 3 runs to the limit can not make walking beam 5 move back and forth, and linear electric motors 2 can not get the situation of counter motion signal.Mover on the walking beam 5 (balance iron 3) range ability position sensor 19 will be shut down to controller output signal, report to the police with light or other modes simultaneously, and fault is in time handled.

Claims

1. differential balance pressure oil-pumping unit, comprise motor, driving wheel, rocking arm, link rod, walking beam, counterweight, horse head, sucker rod and derrick, driving wheel is connected on the output shaft of motor; rocking arm radially is connected on the driving wheel, and the two ends of link rod are hinged with an end of the placement counterweight of the outer end of rocking arm and walking beam respectively; The middle part of walking beam is hinged on the top of derrick, and the upper end of horse head and sucker rod that is positioned at the other end of walking beam is hinged, and it is characterized in that: installation one straight line motor on described walking beam adds balance iron on the mover of these linear electric motors; Described driving wheel is in transmission connection by the driven pulley in the flywheel axle center on a driving-belt and the speed stabilizing generator shaft.

2. differential balance pressure oil-pumping unit according to claim 1, it is characterized in that: also comprise control system, this control system comprises rotating-speed control circuit, electromotor control circuit and voltage thereof and speed feedback circuit, wax removal and warning indication and the Ka Jing and the warning indicating circuit of controller and the data setting device that is connected with its each input port, oil surface sensor, pipe pressure sensor, position sensor, linear motor rotor drive circuit, speed stabilizing generator, and the output of linear motor rotor drive circuit is connected with described linear electric motors.

3. differential balance pressure oil-pumping unit according to claim 2 is characterized in that: described controller can adopt single-chip microcomputer or programmable logic controller PLC.

4. differential balance pressure oil-pumping unit according to claim 1 is characterized in that: described linear electric motors are permanent-magnetism linear motor, and its stator core adopts the monolateral or double-flanged end structure of Ru-Fe-Mn permanent magnet, and mover adopts three-phase step-by-step movement structure; These linear electric motors have the duplex feeding power supply, one tunnel excitation field of supplying with these linear electric motors and described speed stabilizing generator behind 50HZ power frequency supply rectifying and wave-filtering wherein, another road is supplied with these linear electric motors with the three-phase alternating current electric rectification filter that the speed stabilizing generator sends after voltage adjuster feeds back simultaneously.