Walking-beam-free elliptical annular pumping unit

Abstract

A walking-beam-free elliptical annular pumping unit belongs to the technical field of oil field pumping equipment and is characterized in that a motor is positioned in the center of a bracket, a speed reducer output shaft at the upper part of the motor is connected with a central shaft, and an upper bearing and a lower bearing are respectively arranged at the upper end and the lower end of the central shaft; the circumferential direction of the central shaft is connected with the elliptical ring through an upper support; the elliptical ring is connected with a beam hanger through a sliding block, the beam hanger is connected with a balance belt through a hanging rope, the balance belt bypasses a right-end hanging weight wheel at the top of the support, and a left-end balance wheel is connected with a balance weight; hanging pulley blocks at two ends of the beam hanger are positioned in slideways on two sides of the right side of the bracket; balance pulley blocks at two ends of the balance weight are positioned in slideways on the left side of the bracket; the reducer is connected with the lower portion of the support through a support. The transmission mechanism is simple, the manufacturing cost is low, the driving torque is large, the mechanical transmission efficiency is high, and particularly, the long-stroke and low-stroke-frequency crude oil production requirements of a heavy oil well can be met.

Description

Technical Field

[0001] This utility model relates to the technical field of oilfield pumping equipment, specifically a beamless elliptical annular pumping unit. Background Technology

[0002] Oil pumping units are one of the most important pieces of equipment in oil extraction and are widely used in oilfields. With changes in oil well conditions and advancements in oil production technology, long-stroke, low-stroke pumping units are becoming increasingly prevalent. Currently, oil pumping units used in oilfield production...

[0003] There are many types of pumping units, which can be divided into beam pumping units and beamless pumping units. Both types of pumping units have the following disadvantages: Beam pumping units, although widely used (accounting for 95%), are large in size, have high material consumption, are difficult to adjust and balance (currently requiring professional teams for adjustment), and have high inertial loads, especially with the crank pins being prone to breakage, leading to frequent pumping unit overturning accidents. Beamless chain-driven pumping units are more commonly used in heavy oil blocks, but the chain drive reversing system is complex, the frame is a chain box, resulting in high noise and serious oil leakage. They also require a gearbox, necessitating regular lubrication changes, leading to a large workload and high maintenance costs. There are also beamless motor-driven reversing pumping units, where the motor is located at the top of the frame, making maintenance inconvenient, causing frequent motor starts and stops, resulting in high starting current, easy damage to the control system, and high impact loads. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a beamless elliptical annular pumping unit with a simple transmission mechanism, low manufacturing cost, large driving torque, and high mechanical transmission efficiency, especially capable of meeting the needs of long-stroke and low-stroke crude oil production in heavy oil wells.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A beamless elliptical annular pumping unit consists of a motor, reducer, support, lower bearing, bracket, central shaft, upper support, elliptical ring, suspension pulley block, slider, suspension rope device, square clamp, suspension rope, balance belt, suspension wheel, upper bearing, balance wheel, counterweight, balance pulley block, frequency converter cabinet, and cable. The motor is located at the center of the bracket, and a reducer is installed above the motor. The output shaft of the reducer is connected to the central shaft. The upper and lower ends of the central shaft are respectively equipped with upper and lower bearings. The upper end of the central shaft is connected to the top center of the bracket through the bearing seat of the upper bearing. The circumference of the central shaft is connected to the elliptical ring through the upper support. The centerline of the central shaft is equidistant from the centerline of the elliptical ring at all points.

[0007] The elliptical ring is connected to the suspension rope device via a slider, and the suspension rope device is connected to the balance belt via a suspension rope. The balance belt passes around the suspension wheel at the right end of the top of the support and the balance wheel at the left end and is connected to the counterweight.

[0008] Two ends of the rope hanger are provided with counterweight pulley sets, and the counterweight pulley sets are located in the slideways on the left sides of the supports;

[0009] Two ends of the counterweight are provided with balance pulley sets, and the balance pulley sets are located in the slideways on the left sides of the supports;

[0010] The reducer is connected with the lower part of the support through support;

[0011] The frequency conversion cabinet is connected with the motor through a cable.

[0012] Further, the sliding block is a "T" type two-half structure, the left end is provided with a "C" type opening, two small semicircle graphite copper sleeves are arranged in the opening, the left part of the sliding block is a circular shaft composed of two halves, a polished rod through hole is vertically arranged in the middle of the circular shaft, a "T" type stopper is arranged on the right side of the polished rod through hole, the stopper is connected with the rope hanger through fixing bolts, two middle bearings are arranged on the circular shaft, and the left end is fixed through a locking nut.

[0013] Further, the counterweight pulley set is provided with two groups, one group is arranged on each side of the rope hanger, each group is provided with four to eight wheels, one to two transverse wheels are arranged on the two sides, and two to four longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slideway.

[0014] Further, the counterweight pulley set is also provided as a sliding bearing.

[0015] Further, the balance pulley set is provided with two groups, one group is arranged on each side of the counterweight, each group is provided with four to eight wheels, one to two transverse wheels are arranged on the two sides, and two to four longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slideway.

[0016] Further, the balance pulley set is also provided as a sliding bearing.

[0017] Further, the counterweight is a split structure.

[0018] Further, the support is a rectangular truss structure, four columns are "H" steel structures, and the inside is a slideway.

[0019] Further, the support is a rectangular truss structure, and the parts of the truss are connected through bolts, the four columns are cylindrical structures, and the outer rotary surface is a smooth surface matched with the sliding bearing.

[0020] The utility model has the following beneficial effects compared with the prior art:

[0021] 1. The motor drives the central shaft through the reducer to rotate the elliptical ring, the elliptical ring drives the sliding block and the rope hanger, the sliding block realizes reversing through the upper dead point and the lower dead point of the elliptical ring, the rotating motion of the motor is changed into the reciprocating motion of the rope hanger, and the rope hanger drives the polished rod, the sucker rod and the deep well pump to move up and down through the square clamp, so that crude oil is pumped out of the ground.

[0022] 2. The utility model discloses novel design, reasonable structure, transmission mechanism is simple, and the manufacturing cost is low.

[0023] 3. The utility model discloses elliptic ring driving moment is big, mechanical transmission efficiency is high, can realize long stroke, through frequency conversion control, realizes low stroke, especially suitable for thick oil well crude oil production. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the schematic diagram of the shaft side structure of the utility model

[0025] Figure 2 It is the assembly overhead pulley set 8, sliding block 9, suspension rope device 10 overhead structure schematic diagram of the utility model

[0026] 0. motor, 1. speed reducer, 2. support, 3. lower bearing, 4. support, 4-1. slide; 5. center shaft, 6. upper support, 7. elliptic ring, 8. overhead pulley set, 9. sliding block, 9-0. opening, 9-1. graphite copper sleeve, 9-2. round shaft, 9-3. polished rod through -hole, 9-4. locking nut, 9-5. middle bearing, 9-6. bushing, 10. suspension rope device, 10-1. stop block, 10-2. suspension rope through -hole, 10-3. fixed bolt;11. square clamp, 12. suspension rope, 13. balance belt, 14. overhead wheel, 15 upper bearing, 16. balance wheel, 17. counterweight, 18. balance pulley set, 19. frequency conversion cabinet, 20. cable, 21. oil production well wellhead device, 22. polished rod;A. top dead center, B. bottom dead center. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the drawings: Example 1

[0028] As Figure 1 Indicated, a beamless elliptic ring type oil pumping unit, comprising: motor 0, speed reducer 1, support 2, lower bearing 3, support 4, center shaft 5, upper support 6, elliptic ring 7, overhead pulley set 8, sliding block 9, suspension rope device 10, square clamp 11, suspension rope 12, balance belt 13, overhead wheel 14, upper bearing 15, balance wheel 16, counterweight 17, balance pulley set 18, frequency conversion cabinet 19, cable 20, oil production well wellhead device 21, polished rod 22;Its motor 0 is located at the center of support 4, and the upper portion of motor 0 is provided with speed reducer 1, and the output shaft of speed reducer 1 is connected with center shaft 5, and the upper and lower ends of center shaft 5 are respectively provided with upper bearing 15 and lower bearing 3, and the upper end of center shaft 5 is connected with the top center of support 4 through the bearing seat of upper bearing 15, and the circumference of center shaft 5 is connected with elliptic ring 7 through upper support 6, and the center line of center shaft 5 is equal to the center line of elliptic ring 7 everywhere;

[0029] The elliptical ring 7 is connected with the suspension rope device 10 through the sliding block 9, the suspension rope device 10 is connected with the balance belt 13 through the suspension rope 12, the balance belt 13 is connected with the counterweight 14 at the right end of the top of the support 4, the balance wheel 16 and the counterweight 17 at the left end;

[0030] The suspension rope device 10 is provided with the counterweight pulley set 8 at both ends, the counterweight pulley set 8 is located in the slide 4-1 on both sides of the right side of the support 4;

[0031] The counterweight 17 is provided with the balance pulley set 18 at both ends, the balance pulley set 18 is located in the slide 4-1 on both sides of the left side of the support 4;

[0032] The speed reducer 1 is connected with the lower part of the support 4 through the support 2;

[0033] The frequency conversion cabinet 19 is connected with the motor 0 through the cable 20.

[0034] As shown in the drawings, Figure 2 Specifically, the sliding block 9 of the no-beam elliptical ring type oil pumping unit is a "T" type two-half structure, the left end is provided with a "C" type opening 9-0, two small semicircle graphite copper sleeves 9-1 are arranged in the opening 9-0, the left part of the sliding block 9 is a circular shaft 9-2 composed of two halves, a vertical light pole through hole 9-3 is arranged in the middle of the circular shaft 9-2, a "T" type stop block 10-1 is arranged at the right side of the light pole through hole 9-3, the stop block 10-1 is connected with the suspension rope device 10 through the fixing bolt 10-3, two middle bearings 9-5 are arranged on the circular shaft 9-2, and the left end is fixed through the locking nut 9-4.

[0035] The application of the graphite copper sleeve 9-1 further improves the lubricating effect of the sliding block 9 and the elliptical ring 7, and reduces the friction.

[0036] Specifically, the counterweight pulley set 8 is provided as two groups, one group is arranged on each side of the suspension rope device 10, each group has eight wheels, two transverse wheels are arranged on each side, and four longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slide 4-1.

[0037] Specifically, the balance pulley set 18 is provided as two groups, one group is arranged on each side of the counterweight 17, each group has eight wheels, two transverse wheels are arranged on each side, and four longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slide 4-1.

[0038] Specifically, the counterweight 17 is a split structure.

[0039] Specifically, the support 4 is a rectangular truss structure, the truss components are all connected by bolts, the four columns are "H" steel structures, and the inside is the slide 4-1. Example two

[0040] As shown in the drawings, Figure 1As shown, a beamless elliptical annular pumping unit includes: a motor 0, a reducer 1, a support 2, a lower bearing 3, a bracket 4, a central shaft 5, an upper support 6, an elliptical ring 7, a suspension pulley block 8, a slider 9, a suspension rope device 10, a square clamp 11, a suspension rope 12, a balance belt 13, a suspension wheel 14, an upper bearing 15, a balance wheel 16, a counterweight 17, a balance pulley block 18, a frequency converter 19, a cable 20, an oil wellhead device 21, and a polished rod 22. The motor 0 is located at the center of the bracket 4. The reducer 1 is located on the upper part of the motor 0. The output shaft of the reducer 1 is connected to the central shaft 5. The upper and lower ends of the central shaft 5 are respectively provided with an upper bearing 15 and a lower bearing 3. The upper end of the central shaft 5 is connected to the top center of the bracket 4 through the bearing seat of the upper bearing 15. The circumference of the central shaft 5 is connected to the elliptical ring 7 through the upper support 6. The centerline of the central shaft 5 is equidistant from the centerline of the elliptical ring 7 at all points.

[0041] The elliptical ring 7 is connected to the suspension rope device 10 via the slider 9. The suspension rope device 10 is connected to the balance belt 13 via the suspension rope 12. The balance belt 13 passes around the suspension wheel 14 at the right end of the top of the support 4 and the balance wheel 16 at the left end and is connected to the counterweight 17.

[0042] The suspension rope device 10 is provided with a suspension pulley group 8 at both ends, and the suspension pulley group 8 is located in the slide rails 4-1 on both sides of the right side of the bracket 4;

[0043] The counterweight 17 is provided with a balance pulley group 18 at both ends, and the balance pulley group 18 is located in the slide rails 4-1 on both sides of the left side of the bracket 4;

[0044] The reducer 1 is connected to the lower part of the bracket 4 via the support 2;

[0045] The frequency converter cabinet 19 is connected to the motor 0 via cable 20.

[0046] like Figure 2 As shown, specifically, the slider 9 of a beamless elliptical annular oil pump has a "T"-shaped two-half structure. The left end has a "C"-shaped opening 9-0, and two small semi-circular graphite copper sleeves 9-1 are provided inside the opening 9-0. The left part of the slider 9 is a circular shaft 9-2 composed of two halves. The circular shaft 9-2 has a smooth rod through hole 9-3 vertically in the middle. A "T"-shaped stop 10-1 is provided on the right side of the smooth rod through hole 9-3. The stop 10-1 is connected to the suspension rope device 10 by a fixing bolt 10-3. Two intermediate bearings 9-5 are provided on the circular shaft 9-2, and the left end is fixed by a locking nut 9-4.

[0047] Specifically, the suspended pulley block 8 is configured as a sliding bearing.

[0048] Specifically, the balance pulley assembly 18 is also configured as a sliding bearing.

[0049] Specifically, the counterweight 17 is a split structure.

[0050] Specifically, the support 4 is a rectangular truss structure, and each part of the truss is bolted. The four columns are cylindrical structures, and the outer rotary surface is a smooth surface matched with a sliding bearing.

[0051] Working principle: A beamless elliptical ring pumping unit, whose motor 0 drives the central shaft 5 through the reducer 1 to rotate the elliptical ring 7, the elliptical ring 7 drives the sliding block 9 and the rope hanger 10. The sliding block 9 realizes reversing through the upper dead point A and the lower dead point B of the elliptical ring 7, and changes the rotary motion of the motor 0 into the reciprocating motion of the rope hanger 10. The rope hanger 10 drives the polished rod 22, the sucker rod, and the deep well pump to move up and down, and the crude oil is pumped out of the ground. Example three

[0052] The installation and application steps of the beamless elliptical ring pumping unit are as follows:

[0053] The concrete foundation of the pumping unit is placed in position, the level is found, each part of the support 4 is bolted firmly, and is fixedly connected with the concrete foundation;

[0054] The motor 0 and the reducer 1 are installed, and the four supports 2 are connected with the bottom four corners of the support 4;

[0055] The central shaft 5 and the upper support 6 and the lower part of the elliptical ring 7 are connected with the reducer 1, and the upper part is connected with the top of the support 4;

[0056] The counterweight wheel 14 and the balance wheel 16 are respectively installed at the two ends of the top of the support 4;

[0057] The "C" type opening 9-0 of the sliding block 9 is clamped on the elliptical ring 7, the two halves of the left part of the sliding block 9 are composed of a circular shaft 9-2, two middle bearings 9-5 are installed on the circular shaft 9-2, and a bushing 9-6 is sleeved, the rope hanger 10 is installed, the locking nut 9-4 is screwed, and the rope hanger 10 is not tightened first, the counterweight pulley set 8 at the two ends of the rope hanger 10 is put into the slide 4-1, the polished rod 22 passes through the polished rod through hole 9-3, the square clamp 11 is tightened, the stop block 10-1 is removed, the suspension rope 12 is put into the suspension rope through hole 10-2, the stop block 10-1 is put in, and the fixing bolt 10-3 is tightened;

[0058] The suspension rope 12 and the balance belt 13 are connected with the counterweight 17 through the counterweight wheel 14 and the balance wheel 16, and the balance pulley set 18 is put into the slide 4-1, and the locking nut 9-4 is tightened;

[0059] The 380V power supply is connected with the frequency conversion cabinet 19, the cable 20 and the motor 0 through a long cable;

[0060] The wellhead polished rod seal packer of the oil production well wellhead device 21 is added, the production gate and the back pressure gate are opened;

[0061] Open the frequency conversion cabinet 19, adjust the low frequency, press the start button, start the motor 0, observe the running effect, detect the current, calculate the balance, the up and down current balance ratio is 90-100%, increase or decrease the balance weight 17 according to the needs;

[0062] Apply appropriate amount of lubricating grease on the oval ring 7 and the polished rod 22;

[0063] Clean up the tools and utensils, and record the relevant data on the shift report.

[0064] Although the preferred embodiments of the present application have been described above, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover all such changes and modifications that fall within the scope of the present application.

[0065] Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. A beamless elliptical ring type pumping unit, comprising: Motor (0), reducer (1), support (2), lower bearing (3), bracket (4), center shaft (5), upper support (6), oval ring (7), counterweight pulley block (8), slider (9), rope suspension device (10), square clamp (11), rope suspension device (12), balance belt (13), counterweight pulley (14), upper bearing (15), balance pulley (16), counterweight (17), balance pulley block (18), frequency conversion cabinet (19), cable (20); characterized in that: the motor (0) is located in the center of the bracket (4), the upper part of the motor (0) is provided with the reducer (1), the output shaft of the reducer (1) is connected with the center shaft (5), the upper and lower ends of the center shaft (5) are respectively provided with the upper bearing (15) and the lower bearing (3), the upper end of the center shaft (5) is connected with the top center of the bracket (4) through the bearing seat of the upper bearing (15), the circumference of the center shaft (5) is connected with the oval ring (7) through the upper support (6), and the center line of the center shaft (5) is equal to the center line of the oval ring (7) everywhere; The oval ring (7) is connected with the rope suspension device (10) through the slider (9), the rope suspension device (10) is connected with the balance belt (13) through the rope suspension device (12), and the balance belt (13) is connected with the balance weight (17) by passing through the counterweight pulley (14) at the right end and the balance pulley (16) at the left end of the top of the bracket (4). The rope suspension device (10) is provided with the counterweight pulley block (8) at both ends, and the counterweight pulley block (8) is located in the slide (4-1) on both sides of the right side of the bracket (4). The counterweight (17) is provided with the balance pulley block (18) at both ends, and the balance pulley block (18) is located in the slide (4-1) on both sides of the left side of the bracket (4). The reducer (1) is connected with the lower part of the bracket (4) through the support (2). The frequency conversion cabinet (19) is connected with the motor (0) through the cable (20).

2. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The slider (9) is a "T" type two half structure, the left end is provided with a "C" type opening (9-0), two small semicircle graphite copper sleeves (9-1) are arranged in the opening (9-0), the left part of the slider (9) is a circular shaft (9-2) composed of two halves, a light rod through hole (9-3) is vertically arranged in the middle of the circular shaft (9-2), a "T" type stop block (10-1) is arranged on the right side of the light rod through hole (9-3), the stop block (10-1) is connected with the rope suspension device (10) through a fixing bolt (10-3), two middle bearings (9-5) are arranged on the circular shaft (9-2), and the left end is fixed through a locking nut (9-4).

3. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The counterweight pulley block (8) is provided with two groups, one group is arranged on each side of the rope suspension device (10), each group is provided with 4-8 wheels, 1-2 transverse wheels are arranged on both sides, 2-4 longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slide (4-1).

4. The cable-suspended elliptical ring type pumping unit according to claim 3, characterized in that: The counterweight pulley block (8) is also provided with a sliding bearing.

5. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The balance pulley block (18) is provided with two groups, one group is arranged on each side of the counterweight (17), each group is provided with 4-8 wheels, 1-2 transverse wheels are arranged on both sides, 2-4 longitudinal wheels are arranged in the middle, and the longitudinal and transverse dimensions are slightly smaller than the size of the slide (4-1).

6. The cable-suspended elliptical ring type pumping unit according to claim 5, characterized in that: The balance pulley block (18) is also provided with a sliding bearing.

7. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The counterweight (17) is a split structure.

8. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The support (4) is a rectangular truss structure, and each part of the truss is bolted, and the four columns are "H" steel structures, and the inside is a slide (4-1).

9. The cable-suspended elliptical ring type pumping unit according to claim 1, characterized in that: The support (4) is a rectangular truss structure, and the four columns are cylindrical structures, and the outer rotary surface is a smooth surface matched with a sliding bearing.

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