CN205638378U - Support type double well oil production device driven by switched reluctance motor - Google Patents

Abstract

The utility model provides a two well oil production devices of posture that switched reluctance motor dragged, including locating switched reluctance motor and the switched reluctance motor switch board between two wellheads, reluctance motor and switched reluctance motor switch board are connected, switched reluctance motor output shaft has the cylinder, two wellheads opposite sides all are equipped with the support, the support top is connected with the pulley. The utility model uses the switch reluctance motor as power, the device has no beam-pumping unit, uses the bracket as support, uses the double pulleys as guiding tools, realizes that one switch reluctance motor drags two oil wells, the motor pure torque transmission improves the transmission efficiency and reduces the energy consumption; the belt transmission structure is not adopted, so that the conditions of belt slipping, rotation loss, breakage, falling off and the like are avoided, and the labor intensity of workers is reduced; by applying the switched reluctance motor, the advantages of large starting torque, adjustable rotating speed, capability of forward and reverse rotation, high power factor and the like are achieved, and the energy consumption of oil pumping is reduced; the oil extraction double-pulley guide transmission can reduce the load of the motor.

Description

Support type double well oil production device driven by switched reluctance motor

technical field

The utility model belongs to the technical field of oil extraction wells in oil fields, and in particular relates to a bracket type double well oil extraction device driven by a switched reluctance motor.

Background technique

The beam pumping unit has been used for more than 100 years due to its simple structure, strong adaptability, and convenient operation and maintenance, and it is still the most important oil production method at present, accounting for more than 90% of domestic oil fields. The beam pumping unit is mainly composed of a donkey head, a beam, a connecting rod, a crank, a reduction box and an electric motor. When the pumping unit is working, after the motor is decelerated by the belt reducer, the crank-link mechanism converts the rotary motion of the output shaft of the reducer into the reciprocating motion of the donkey head, thereby driving the oil well pump to reciprocate up and down to complete the oil extraction process.

The beam pumping unit has played a very important role in the history of my country's oil development. However, with the development of science and technology and the progress of oil extraction technology, the disadvantages of the beam pumping unit are gradually becoming more and more obvious. The main problems are as follows:

1. Low transmission efficiency

The beam pumping unit has many transmission links, including belts, reduction boxes, connecting rods, cranks, beams, donkey heads, downhole poles, etc., and its own mechanical transmission energy loss is about 28%. The efficiency of the conventional beam pumping unit is generally only 12%-23% in China, and the highest is only about 30%.

2. The problem of excessive inertial load

The four-bar linkage mechanism of the beam pumping unit makes the movement of the donkey head similar to simple harmonic motion. The acceleration at the upper and lower dead points is very large, resulting in a large inertial load, which makes the pumping unit bear too much load and the torque of the reduction box Large fluctuations increase the gear impact and shorten the service life of the gearbox and pumping unit.

3. Poor motor adaptability

1) The beam pumping unit is mainly equipped with a three-phase asynchronous motor. The pumping unit starts at full voltage, and the current reaches 5-7 times its rated current when starting, which has a large impact on the grid and motor current, and the grid voltage fluctuates greatly. .

2) Due to the change of the pumping unit's own structure and pumping working conditions, it will be unbalanced with the change of the load during the up and down stroke operation, and the difference is large, so that the motor has the phenomenon of "reverse power generation" during operation. "Inverted power generation" not only causes a certain energy loss, but also causes a certain disturbance to the power grid. There are many motor burnout accidents and high maintenance costs. At the same time, the power factor of the power grid and the motor is further reduced, resulting in energy waste.

3) The motor presents a "hard characteristic" when operating at power frequency, and the impact loss is large when the load changes and changes. At the same time, the unbalanced state is covered up, causing the pumping unit to waste energy on "weight lifting".

4) The power factor is low, and the line and reactive power losses are large. The phenomenon of "big horses and small carts" is ubiquitous. During normal operation, the load becomes lighter and the required torque is smaller. There is a problem that the load characteristics of the sucker rod do not match the mechanical characteristics of the motor 23, and the power utilization rate is very low.

4. The workload of parameter adjustment is heavy

When the working system of the oil well changes and the punching frequency needs to be adjusted, the belt pulley or the reduction box needs to be replaced. The process is cumbersome, high risk and heavy workload.

5. Other issues

Conventional pumping units are equipped with a reduction box, but the reduction box is used as a reduction mechanism, and oil leakage and mechanical wear of the gears caused by casting defects often occur during operation, which affects the normal production of the oil well and the service life of the pumping unit. Secondly, as the transmission mechanism between the motor and the reduction box, the belt also has many disadvantages. For example, when the motor encounters rainy and snowy weather or the load increases, the belt is prone to slipping, lost rotation and breakage, which will increase the labor intensity of the workers. The operation cost is high and the production time rate is reduced.

Utility model content

The purpose of this utility model is to provide a beam-pumping unit without the beam, which uses a bracket as a support, and a switched reluctance motor to provide power. The power system realizes the oil production of two oil wells.

For this reason, the utility model provides a bracket-type double-well oil production device driven by a switched reluctance motor, including a switched reluctance motor and a switched reluctance motor control cabinet arranged between the two wellheads, the reluctance motor and the switched reluctance motor control cabinet. The switched reluctance motor control cabinet is connected, the output shaft of the switched reluctance motor is connected with a drum, and the other sides of the two wellheads are provided with supports, and the top ends of the supports are connected with pulleys;

The drum includes a drum shaft and a drum roller. Two groups of cables are wound on the drum roller. The two groups of cables are wound in opposite directions to the drum rollers. The ends of the two groups of cables go around the pulleys at the top of the two brackets and are connected to the corresponding polished rods. , the polished rod is connected with the oil pump in the oil well.

The switched reluctance motor is arranged on the center line between two oil wells.

The bottom of the bracket is provided with a bracket base.

The output shaft of the switched reluctance motor is connected with the drum shaft through a coupling.

The cable is connected with the polished rod through a rope hanger.

Described pulley is double pulley.

The beneficial effects of the utility model are: the bracket type double well oil production device provided by the utility model uses the switched reluctance motor as the power, the device has no beam pumping unit, uses the bracket as the support, and the double pulley as the guiding tool , to achieve a switched reluctance motor to drive two oil wells, the pure torque transmission of the motor improves the transmission efficiency and reduces energy consumption; the no-belt transmission structure prevents the belt from slipping, losing rotation and breaking off, etc., reducing labor for workers Intensity; the application of switched reluctance motor, large starting torque, adjustable speed, forward and reverse rotation and high power factor can reduce oil pumping energy consumption; oil production double pulley guide transmission will reduce the motor load.

Further details will be described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of a support type double well oil production device driven by a switched reluctance motor of the present invention;

Fig. 2 is a schematic diagram of a drum driven by a switched reluctance motor;

Fig. 3 is a schematic diagram of a conventional beam pumping unit.

In the figure: 1. Switched reluctance motor control cabinet; 2. Switched reluctance motor; 3. Drum; 4. Cable; 5. Double pulley; 6. Rope hanger; 10. Bracket base; 11. Output shaft of switched reluctance motor; 12. Coupling; 13. Drum shaft; 14. First well cable; 15. Drum roller; 16. Second well cable; 17. Donkey head ; 18, beam; 19, beam; 20, connecting rod; 21, crank; 22, reduction box; 23, electric motor; 24, brake.

detailed description

Example 1:

This embodiment provides a bracket-type double-well oil production device driven by a switched reluctance motor, including a switched reluctance motor 2 and a switched reluctance motor control cabinet 1 arranged between two wellheads 8, the reluctance motor and the switched reluctance motor The switched reluctance motor control cabinet 1 is connected, the output shaft 11 of the switched reluctance motor is connected to the drum 3, and the other sides of the two wellheads 8 are provided with a bracket 9, and the top of the bracket 9 is connected to a pulley;

The drum 3 includes a drum shaft 13 and a drum roller 15, two groups of cables 4 are wound on the drum roller 15, the directions of the two groups of cables 4 winding the drum roller 15 are opposite, and the ends of the two groups of cables 4 are respectively wound around two brackets 9. The pulley at the top is connected with the corresponding polished rod 7, and the polished rod 7 is connected with the oil well pump in the oil well.

The oil extraction device provided in this embodiment is composed of a switched reluctance motor 2, two sets of supports 9, a pulley, and a drum 3. The output shaft 11 of the switched reluctance motor is connected to the drum shaft 13, and two sets of cables wound on the drum roller 15 4 forward and reverse winding, two cables 4 are connected with two well polished rods 7 through pulleys. When the oil production device is working, the switched reluctance motor 2 drives the drum shaft 13, and the rotation of the drum shaft 13 drives the drum 3 to rotate. When the switched reluctance motor 2 rotates forward, the cable 14 of the first well is wound on the drum 3, and this well realizes After the upstroke, the cable 16 of the second well is released, and the downstroke is completed; when the switched reluctance motor 2 motor reverses, the cable 14 of the first well is released, and the downstroke of oil pumping is completed, and the cable 16 of the second well Wrapped around the drum 3, the upstroke is completed, so that the two wells complete a swabbing process. The switched reluctance motor 2 motor realizes forward and reverse switching within the set time, driving the two well rod strings to reciprocate. In this repeated cycle, the two wells continue to alternate up and down strokes, which will continuously lift the bottom liquid to the ground, realizing The pumping oil production of the oil pump is realized; while the strokes and stroke times of the two wells are the same, the pumping stroke times can be controlled by setting the speed in the switched reluctance motor control cabinet 1, and the stroke is controlled by adjusting the forward and reverse switching time of the motor.

Example 2:

On the basis of Embodiment 1, this embodiment provides a bracket-type double-well oil production device driven by a switched reluctance motor as shown in Figure 1. The switched reluctance motor 2 is arranged on the center line between the two oil wells. Support base 10 is provided with support base 10 at the bottom of support 9, and cable 4 is connected with polished rod 7 by rope hanger 6;

As shown in FIG. 2 , the output shaft of the switched reluctance motor is connected to the drum shaft 13 through a coupling 12 . The output shaft 11 of the switched reluctance motor is opposite to the drum shaft 13, and the middle is connected by a coupling 12. The center of the drum shaft 13 is basically in the same plane as the wellhead 8 and the double pulley 5. The ends of the group cables 4 are connected with the rope hanger 6 through the double pulley 5 structure at the top of the support 9, and the lower end of the rope hanger 6 is connected with the polished rod 7 and the downhole pole. When the oil production device is working, the switched reluctance motor 2 transmits power to the drum 3 through the coupling 12, and the forward and reverse rotation of the drum 3 completes the retracting and releasing process of the two sets of cables 4.

Conventional beam pumping unit as shown in Figure 3, is made up of donkey head 17, beam 18, connecting rod 20, beam 19, crank 21, reduction box 22, motor 23, brake 24 and other parts. When the pumping unit is working, after the motor 23 is decelerated by the belt reducer, the crank 21 and the connecting rod 20 mechanism convert the rotary motion of the output shaft of the reducer into the reciprocating motion of the donkey head 17, thereby driving the oil pump to reciprocate up and down to complete the oil extraction process .

To sum up, compared with the oil production device provided by the utility model, it has the following beneficial effects:

1. The beam 18 is removed, there is no pumping unit belt drive, reduction box, connecting rod 20, and the donkey head 17 and other structures, and the pure torque output of the motor 23 improves the transmission efficiency of the motor 23; there is no need for pumping unit maintenance , Belt replacement and other work, reduce the work intensity and operating costs of employees, ensure the production time rate, reduce the mechanical loss of the ground system, and make the system run more safely and reliably;

2. The switched reluctance motor 2 is used as power, which reduces the operating current, active and reactive power of the motor, and reduces the energy loss of the motor; at the same time, the switched reluctance motor control cabinet 1 is equipped with overcurrent, overvoltage and overload protection, Ensure safe and reliable operation;

3. The rotating speed of the motor 23 is greatly reduced, the internal friction of the motor 23 is reduced, and the ground efficiency of the mechanical mining system is improved;

4. A switched reluctance motor 23 drives two oil wells, alternately drives the two wells for oil production, and the pure torque transmission of the motor improves the transmission efficiency and reduces energy consumption;

5. The switched reluctance motor control cabinet 1 is controlled by a microcomputer, which can carry out intelligent speed regulation operation according to the load change of the pumping unit, which is convenient for parameter adjustment of the pumping unit. Adjustment of stroke frequency and stroke;

6. 5 groups of double pulleys are used for guiding transmission, which reduces the output force of the motor 23 and reduces the energy consumption of the motor.

The components and structures not described in detail in this embodiment belong to the known components and commonly used structures in this industry. The switched reluctance motor control cabinet belongs to the prior art, and will not be described here one by one.

The above examples are only illustrations of the utility model, and do not constitute a limitation to the protection scope of the utility model. All designs identical or similar to the utility model all belong to the protection scope of the utility model.

Claims (6)

1. the stent-type twin-well extracting device of oil that switched reluctance machines drags, it is characterized in that: include switched reluctance machines (2) and the switched Reluctance Motor Control cabinet (1) being located between two well heads (8), described reluctance motor and switched Reluctance Motor Control cabinet (1) connect, described switched reluctance machines output shaft (11) connects cylinder (3), described two well heads (8) opposite side is equipped with support (9), and described support (9) top connects pulley；

Described cylinder (3) includes drum shaft (13) and cylinder roller (15), two groups of hawsers (4) it are wound with on this cylinder roller (15), described two groups of hawsers (4) are wound around the in opposite direction of cylinder roller (15), these two groups of hawser (4) ends are walked around the pulley on two stands (9) top respectively and are connected with corresponding polished rod (7), and described polished rod (7) is connected with the oil well pump in oil well.

The stent-type twin-well extracting device of oil that switched reluctance machines the most according to claim 1 drags, it is characterised in that: described switched reluctance machines (2) is located on the center line between two oil wells.

The stent-type twin-well extracting device of oil that switched reluctance machines the most according to claim 1 drags, it is characterised in that: described support (9) bottom is provided with bracket base (10).

4. the stent-type twin-well extracting device of oil dragged according to the switched reluctance machines described in any one of claim 1-3, it is characterised in that: described switched reluctance machines output shaft is connected with drum shaft (13) by shaft coupling (12).

5. the stent-type twin-well extracting device of oil dragged according to the switched reluctance machines described in any one of claim 1-3, it is characterised in that: described hawser (4) is connected by polished rod eye (6) with polished rod (7).

6. the stent-type twin-well extracting device of oil dragged according to the switched reluctance machines described in any one of claim 1-3, it is characterised in that: described pulley is sister block (5).