CN212774238U

CN212774238U - Tower type linear motor oil pumping unit

Info

Publication number: CN212774238U
Application number: CN202021797665.7U
Authority: CN
Inventors: 乔学征; 王佳琪; 郑建飞; 张宁; 王洪阳
Original assignee: Liaoning Haidisheng Mechanical Co ltd
Current assignee: Liaoning Haidisheng Mechanical Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-03-23
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a tower type linear motor oil pumping unit, which comprises a tower, a steel wire rope, a linear motor, a counterweight barrel and a base; the linear motor comprises a motor stator and a motor rotor; the base is horizontally fixed on the ground, the tower and the motor stator are vertically and respectively fixed on the base, the height of the tower is not lower than that of the motor stator, and the tower is positioned outside the linear motor; the motor rotor is sleeved outside the motor stator and ascends and descends along the motor stator; one end of the steel wire rope and the counterweight barrel are respectively fixedly connected with the motor rotor, and the steel wire rope is driven to synchronously move by the reciprocating lifting of the motor rotor, so that the oil extractor continuously extracts oil; a cage ladder is arranged outside the tower. The utility model provides high transmission efficiency, increase of service life improves factor of safety. The utility model discloses a mechanical structure is simple, uses safe and reliable, and is efficient, and energy-conservation is more than or equal to 60%, constantly widens the core competitiveness of oil recovery.

Description

Tower type linear motor oil pumping unit

Technical Field

The utility model relates to a petroleum equipment field, concretely relates to tower posture linear electric motor beam-pumping unit.

Background

The pumping unit is a mechanical equipment for exploiting petroleum, commonly called as a head knocking machine, and the petroleum is discharged out of a well by a pressurizing method. When the pumping unit strokes upwards, the oil pipe elastically contracts and moves upwards to drive the mechanical plug removal oil extraction device to move upwards and impact the sliding sleeve to generate vibration; meanwhile, the forward check valve is closed, when the variable diameter piston assembly blocks oil, when the pumping unit strokes downwards, the oil pipe elastically extends and moves downwards to drive the mechanical block removal oil extraction device to move downwards, and the mechanical block removal oil extraction device impacts the sliding sleeve to generate vibration; meanwhile, the reverse check valve is partially closed, the reducing piston assembly still blocks the oil sleeve annular oil passage, a high-pressure area is formed in the area below the reverse check valve, and the movement generates reverse impact force on an oil flow passage in the stratum.

The pumping unit still finds some defects in the long-term operation process:

1. the four-bar transmission structure of the pumping unit has low transmission efficiency, so that the energy consumption cannot be reduced, and the energy-saving enhancement advocated by the current society is not met.

2. The whole transmission structure is exposed, so that great potential safety hazards exist, and the safety level is low.

3. If the wellhead end is accidentally unloaded, the falling of the free falling body of the counterweight cannot be controlled manually, and the danger coefficient is further increased.

4. The transmission structure also has the problems of large friction resistance, higher abrasion speed, high failure rate and short service life.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the transmission efficiency is improved, the service life is prolonged, and the safety factor is improved. The utility model provides a tower type linear motor oil pumping unit, which comprises a tower, a steel wire rope, a linear motor, a counterweight barrel and a base;

the linear motor comprises a motor stator and a motor rotor;

the base is horizontally fixed on the ground, the tower and the motor stator are vertically and respectively fixed on the base, the height of the tower is not lower than that of the motor stator, and the tower is positioned outside the linear motor;

the motor rotor is sleeved outside the motor stator and ascends and descends along the motor stator;

one end of the steel wire rope and the counterweight barrel are respectively fixedly connected with the motor rotor, the other end of the steel wire rope extends out of the tower frame and then is vertically and downwards connected with the oil extractor, and the steel wire rope is driven to synchronously move through the reciprocating lifting of the motor rotor so as to enable the oil extractor to continuously extract oil;

a cage ladder is arranged outside the tower; the upper end of the cage ladder is flush with the upper end of the tower and the lower end of the cage ladder is not higher than the middle part of the tower.

The beneficial effects of the utility model are embodied in:

1. the linear motor is used for driving, so that the effect of four-two shifting jacks is achieved, only 5-10% of the maximum load is driven, and the matched power of the motor is greatly reduced.

2. The tower structure can conveniently optimize the pumping parameters of long stroke and low stroke frequency, thereby being beneficial to energy conservation and efficiency improvement;

3. one end vacancy is reserved at the lower end of the cage ladder, so that maintenance personnel can conveniently enter the cage ladder. And the cage ladder extends to the upper end of pylon, and maintainer is safer at the climbing in-process, reduces the possibility that falls into the injury by accident.

4. The optimal matching of the 'horse' is realized by the current reversing of the instantaneous gravity difference of '0', the theoretical balance weight of the counterweight barrel is designed to be the dead weight of a sucker rod plus 1/2 liquid weight, the up-down stroke of the motor only drives 1/2 liquid load, the motor is reversed by the current of the gravity difference of '0' when the motor is stopped and reversed at the upper dead point and the lower dead point, the motor is not started by 3-5 times of rated current, the design concept of 'horse-drawn vehicle' of the oil pumping unit is optimized, and the optimal matching of the horse can be realized.

Preferably, the upper end of the tower is rotatably connected with a fixed pulley and a guide wheel, and the other end of the steel wire rope passes through the fixed pulley and the guide wheel in sequence and then vertically downwards.

Preferably, the diameter of the fixed pulley is larger than that of the guide wheel, and the circle center of the fixed pulley is not lower than that of the guide wheel.

The fixed pulley and the guide wheel both adopt grooved wheels, and the grooved wheels are embedded with viscoelastic fillers and have excellent mechanical properties. Firstly, the friction coefficient is large, and the transmission reliability is ensured; secondly, the transmission component is wear-resistant and replaceable, so that the service life of the transmission component is greatly prolonged; thirdly, damping and reducing noise, and optimizing the operation condition of the whole machine. In addition, the guide wheel adopts a high-strength MC nylon wheel, so that the guide wheel is light in weight, wear-resistant, free of oil and self-lubricating, capable of absorbing shock and reducing noise, free of maintenance for the whole life and capable of prolonging the service life of the steel wire rope by 4-8 times.

Preferably, the tower is in the shape of a hollow cylinder; the linear motor and the counterweight barrel are both positioned in the hollow barrel.

Preferably, the counterweight barrel is located below the motor rotor.

Preferably, the counterweight barrel sleeve is arranged outside the motor stator.

Preferably, a through hole for the motor stator to pass through is arranged along the central line of the counterweight barrel, and a gap is arranged between the counterweight barrel and the motor stator.

The tower structure eliminates unsafe factors of objects, and is beneficial to safety and environmental protection. In particular, the structure provides an ideal support carrier for preventing the balance weight from falling freely, and guarantees the safety of load loss protection. The tower frame has firm and reliable structure, and can construct wind-resistant and sand-resistant beautiful landscape.

Preferably, an inclined support is arranged between the tower and the base.

Preferably, the upper end of the diagonal support is hinged with the tower and the lower end of the diagonal support is hinged with the base.

Preferably, the linear motor control system further comprises a power distribution cabinet for controlling the linear motor.

A control system is arranged in the power distribution cabinet and has complete functions of intelligent control and automatic operation.

One is the random display of pumping parameters, i.e. parameters of up and down current, voltage, stroke frequency, etc. The man-machine interaction interface can conveniently ensure that the operation staff can carry out operation and maintenance correctly; overvoltage, overcurrent and open-phase automatic protection are carried out, and the equipment is ensured to run well; thirdly, stroke and stroke frequency can be adjusted steplessly without stopping, and parameter adjusting efficiency is improved by more than 1000 times; fourthly, an intelligent intermittent pumping working system with high speed and low speed can be randomly set, and the system is suitable for the exploitation working conditions of oil wells with viscous oil and insufficient liquid supply; and fifthly, data acquisition, remote transmission and remote control, indicator diagram simulation interfaces are reserved, and the functions of the digital oilfield can be randomly expanded.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of the present embodiment.

In the attached drawing, a fixed pulley 1, a guide wheel 2, a tower 3, a cage ladder 4, a steel wire rope 5, a motor rotor 6, a motor rotor 7, an inclined support 8, a counterweight barrel 9, a power distribution cabinet 10 and a base 11.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1, the present embodiment provides a tower 3 type linear motor pumping unit, which includes a tower 3, a steel wire rope 5, a linear motor, a counterweight barrel 9, and a base 11. The base 11 is horizontally fixed on the ground, and the tower 3 is in the shape of a hollow cylinder, and specifically adopts a steel structure cylinder. The linear motor comprises a motor stator and a motor rotor 6, the tower 3 and the motor stator are vertically and respectively fixed on the base 11, the height of the tower 3 is not lower than that of the motor stator, and the linear motor and the counterweight barrel 9 are both positioned in the hollow barrel. Specifically, the motor rotor 6 is sleeved outside the motor stator, the motor rotor 6 is lifted along the motor stator, the counterweight barrel 9 is positioned below the motor rotor 6, and the counterweight barrel 9 is sleeved outside the motor stator. A through hole for the motor stator to penetrate through is formed along the center line of the counterweight barrel 9, and a gap is formed between the counterweight barrel 9 and the motor stator. The structure of the tower 3 eliminates unsafe factors of objects, and is beneficial to safety and environmental protection. In particular, the structure provides an ideal support carrier for preventing the balance weight from falling freely, and guarantees the safety of load loss protection. The tower 3 has firm and reliable structure, and can construct wind-resistant and sand-resistant beautiful landscape.

One end of the steel wire rope 5 and the counterweight barrel 9 are respectively fixedly connected with the motor rotor 6, the other end of the steel wire rope 5 extends out of the tower 3 and then is vertically and downwards connected with the oil extractor, and the steel wire rope 5 is driven to synchronously move by the reciprocating lifting of the motor rotor 6, so that the oil extractor continuously extracts oil. The linear motor adopts permanent magnet non-contact transmission, so that the vibration reduction, noise reduction and installation are realized, the centering deviation is allowed, the transmission part is effectively protected, and the maintenance workload is greatly reduced. The upper end of the tower 3 is rotatably connected with the fixed pulley 1 and the guide wheel 2, and the other end of the steel wire rope 5 passes through the fixed pulley 1 and the guide wheel 2 in sequence and then vertically faces downwards. The diameter of the fixed pulley 1 is larger than that of the guide wheel 2, and the circle center of the fixed pulley 1 is not lower than that of the guide wheel 2. The fixed pulley 1 and the guide wheel 2 both adopt grooved wheels, and the grooved wheels are embedded with viscoelastic fillers and have excellent mechanical properties. Firstly, the friction coefficient is large, and the transmission reliability is ensured; secondly, the transmission component is wear-resistant and replaceable, so that the service life of the transmission component is greatly prolonged; thirdly, damping and reducing noise, and optimizing the operation condition of the whole machine. In addition, the guide wheel 2 adopts a high-strength MC nylon wheel, so that the steel wire rope is light in weight, wear-resistant, free of oil and self-lubricating, capable of absorbing shock and reducing noise, free of maintenance for the whole life and capable of prolonging the service life of the steel wire rope 5 by 4-8 times. In addition, the linear motor is simple in structure matched with the fixed pulley 1 and the guide wheel 2, compared with the existing four-connecting-rod beam machine, the structure is simplified by more than 60%, an ideal balance effect is achieved, a motor torque curve is optimized from a high peak-valley difference sine curve to a low peak-valley difference rectangular curve, and an energy-saving and efficiency-increasing directional theoretical platform is constructed.

In order to make the tower 3 more stable, a diagonal brace 8 is provided between the tower 3 and the foundation 11. In particular, the upper end of the diagonal support 8 is hinged to the tower 3 and the lower end of the diagonal support 8 is hinged to the base 11. In order to improve the safety of the maintenance process, a cage ladder 4 is arranged outside the tower 3; the upper end of the cage ladder 4 is flush with the upper end of the tower 3, and the lower end of the cage ladder 4 is not higher than the middle part of the tower 3. The maintenance personnel are safer in the climbing process, and the possibility of accidental falling injury is reduced.

All parts in the embodiment are fixed on the base 11, the complete machine displacement can be completed within minutes only by moving the base 11, and the operation is time-saving, labor-saving, safe and reliable. The present embodiment also comprises a switch cabinet 10 for controlling the linear motor. A control system is arranged in the power distribution cabinet 10, and the control system has complete functions of intelligent control and automatic operation. The control system can display dynamic pumping parameters, namely parameters such as uplink and downlink current, voltage, stroke frequency and the like. Provides a man-machine interaction interface, and can conveniently ensure that the operation staff can carry out operation and maintenance correctly.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a tower posture linear electric motor beam-pumping unit which characterized in that: comprises a tower frame, a steel wire rope, a linear motor, a counterweight barrel and a base;

the linear motor comprises a motor stator and a motor rotor;

2. The tower-type linear motor pumping unit according to claim 1, wherein: the upper end of the tower is rotatably connected with the fixed pulley and the guide wheel, and the other end of the steel wire rope vertically downwards passes through the fixed pulley and the guide wheel in sequence.

3. The tower-type linear motor pumping unit according to claim 2, wherein: the diameter of the fixed pulley is larger than that of the guide wheel, and the circle center of the fixed pulley is not lower than that of the guide wheel.

4. The tower-type linear motor pumping unit according to claim 2, wherein: the tower is in the shape of a hollow cylinder; the linear motor and the counterweight barrel are both positioned in the hollow barrel.

5. The tower-type linear motor pumping unit according to claim 1, wherein: the counterweight barrel is positioned below the motor rotor.

6. The tower-type linear motor pumping unit according to claim 5, wherein: the counterweight barrel sleeve is arranged outside the motor stator.

7. The tower-type linear motor pumping unit according to claim 6, wherein: a through hole for the motor stator to penetrate through is formed in the center line of the counterweight barrel, and a gap is formed between the counterweight barrel and the motor stator.

8. The tower-type linear motor pumping unit according to claim 1, wherein: an inclined support is arranged between the tower and the base.

9. The tower-type linear motor pumping unit according to claim 8, wherein: the upper end of the inclined support is hinged with the tower frame, and the lower end of the inclined support is hinged with the base.

10. The tower-type linear motor pumping unit according to claim 1, wherein: the linear motor power distribution cabinet is characterized by further comprising a power distribution cabinet used for controlling the linear motor.