WO2012010075A1

WO2012010075A1 - Swing type double-well oil pumping machine

Info

Publication number: WO2012010075A1
Application number: PCT/CN2011/077300
Authority: WO
Inventors: 崔钢都; 缪志洪
Original assignee: Cui Gangdu; Miu Zhihong
Priority date: 2010-07-21
Filing date: 2011-07-19
Publication date: 2012-01-26
Also published as: CN201874536U

Abstract

A swing type double-well oil pumping machine consisting of a motor (1) and one or a plurality of double-well oil pumping machine units. The oil pumping machine unit comprises a support (1601) for Well A and a support (1602) for Well B, and a main hanging frame (1603) is disposed between the support for Well A and the support for Well B. The oil pumping machine unit further comprises a transmission shaft (2), a crank wheel (3), a crank link (6), a swing rod (8) and a traction assembly, wherein the crank wheel is connected with the motor by the transmission shaft, and one end of the crank link is connected to the crank wheel by a pin and the other end is connected to the lower part of the swing rod by the pin of the swing rod. The middle part of the swing rod is provided with a swing head bearing (10) horizontally secured to the main hanging frame. The upper part of the swing rod is fixedly butted with a swing head which is provided with a steel wire rope hole. The traction assembly comprises a rope wheel disposed at the top of the support for Well A and a Well A steel wire rope wound around the Well A rope wheel, and a rope wheel at the top of the support for Well B and a Well B steel wire rope wound around the Well B rope wheel. The Well A steel wire rope and the Well B steel wire rope are both fixedly connected to the steel wire rope hole at one end, and are respectively connected to an oil pumping polished rod of corresponding well by respective polished rod eye at the other end. The motor of the present invention drives double-well oil pumping directly without frequent rotation reversions, and therefore the motor runs with an even speed. As a result, the operation reliability is high; control of the device is simple; and the maintenance cost is low.

Description

Swing type double well pumping unit

The invention relates to a swing type double well pumping unit applied to an oil field oil well, and also relates to a coaxial joint multi-point driving double array oil well pumping unit.

Background technique

Most of the existing oil wells are equipped with one machine and one well, and a few oil and gas are equipped with one machine. In the plateau gully zone, due to the scarcity of flat land, the inclined wells are often used to form the aligned wells. The artificial island has limited land resources. Draining wells, oil recovery, double wells and even multi-well pumping can greatly reduce energy consumption, reduce oil production costs, and save equipment investment. Each oilfield company actively promotes the application of cluster well groups with small floor space and high utilization efficiency, and achieves obvious results. Cluster wells refer to drilling a number of ports or even hundreds of wells on a well site or platform. The wellheads are less than a few meters apart, and the well bottoms are extended to different orientations.

China's current pumping unit standard SY/T5044-2003 "Wall beam pumping unit" is based on the revision of the API spiel IE "pumping machine specification" issued by the American Petroleum Institute in 1993, combined with the actual production and use of the revised, deceleration Rated torque M, maximum load P of the suspension point, maximum stroke S is the three main parameters of the pumping unit, using PS/M=C (constant:), with changes in production conditions, such as sucker rod diameter, pump diameter The C value changes when the stroke, stroke, and pump depth change. The three parameters are matched with different grades to form 77 (API spicllE) and 28 (SY/T5044-2003) pumping units of different specifications ( The C value is usually between 3 and 12). Each of the above models is a single-machine single-well structure, which only draws oil on one side and consumes energy on the other side, so that the pump unit has a large unit power price, low pumping efficiency, and low-carbon economy. Related information.

Chinese patent CN101187304A discloses a high-reliability double-well pumping unit, which uses a reversing mechanism to connect with a power mechanism, and a power structure drives a reversing mechanism to perform a closed curve motion. The technology involves a speed reduction mechanism, a speed reduction belt, and a power chain. Wheels, driven sprocket, power chain, driven chain, and reversing links are all steel parts. Every action needs to be turned, there is rigid wear of steel parts, and the average pumping speed per minute is 3- Four calculations, millions of times of reversing rigid uninterrupted friction every year, the existing materials are difficult to meet such use conditions, which will inevitably lead to frequent shutdowns, replacement of wearing parts, and increased operating costs.

Chinese Patent No. 200510046026.0, CN1664305A discloses an "electronic-electric-mechanical integrated traction pumping unit", which eliminates the speed reducer, the efficiency can reach more than 90%, and the stroke and the stroke can be stepless. With the same gearless traction machine, the operation is accurate and stable, direct drag, low speed and large torque, the same volumetric efficiency and other superior performance, unique features such as no-power parking autism, the risk is continuous working all-weather open-air operation, There is no data on the functional stability and longevity of the electronic components of the control system from the north to the south of the climate change ambient temperature, the wet dew point on the ocean. However, the shortcomings are: Can not be used for double well pumping. A counterweight that matches the end of the sucker rod is required, that is, when the weight of one end of the pumping unit is 18 tons, the other end also requires a balance weight of about 18 tons. Only one end works, and the other end loses power. The telescopic mechanism of the head is composed of the guide rail, the handle and the screw at the upper part of the rack. The one end of the load carrying object is a cantilever end, and the processing precision is high. The guide screw needs to be lubricated and lubricated, and the manufacturing and installation cost is high.

Another type of ultra-low-consumption double-well pumping unit disclosed in Chinese patent CN2356162Y uses a hydraulic pump, a hydraulic cylinder, a fuel tank, a commutator, and is connected to a sucker rod through a top fan. The hydraulic cylinder piston rod is composed of a hydraulic pump and a motor. Provides power to control the reciprocating motion of the hydraulic cylinder piston rod through the reversing valve. The machine has the following deficiencies: 1) Hydraulic cylinder piston rod and commutator need to be replaced frequently under continuous working conditions; 2) Fuel tank, hydraulic pump, hydraulic cylinder piston rod rubber seal is easy to aging, oil leakage and pressure under open air operation Unstable; The organization has one well that cannot be operated, shut down, and affects efficiency when one of the wells is overhauled; the mechanism uses four concentrically fixed equal-phase arc-shaped segments with large dimensions, which is time-consuming and labor-intensive to install and process.

Chinese patent CN201092849Y discloses a chain type double well pumping unit, which adopts a chain drive mechanism. The transmission chain of the reducer drives the drive chain on the sprocket in the gear box through the sprocket drive to drive the connection in the upper and lower guide rails. The horizontal movement of the frame realizes the double well pumping, but there are obvious deficiencies: 1) The mechanism involves the reducer and the gearbox is added at the same time. The mechanical transmission efficiency is low. Due to the long-term need for oil lubrication, oil leakage imagination often occurs. 2 Drive chain and drive chain two chains and multiple sprockets, chain drive or chain required for transmission, high quality requirements for chain, long-term in the field working environment, sand and other dust attached to the surface, affecting the service life, 3) The connecting frame of the driving chain through the chain connecting pin shaft needs to be stuck on the upper and lower rails for horizontal movement, and each stroke is rubbed once, and the friction between the metals slides, which is easy to wear and heat, and accelerate deformation and damage.

Chinese patent CN1157527C discloses a "clustered multi-well interactive self-balancing electro-hydraulic integrated intelligent pumping unit", which adopts hydraulic components such as hydraulic pump, hydraulic cylinder, stroke control flow valve, fuel tank, hydraulic line, overflow valve, etc. The speed regulating motor drives the oil pump, and the liquid cylinder drives the sucker rods of the plurality of wells connected to the rope through the guiding wheel to reciprocate up and down. The following deficiencies exist: Hydraulic cylinder plunger, oil The tank, overflow valve and stroke control slide valve need to be replaced frequently under continuous working conditions; the fuel tank, hydraulic pump and hydraulic cylinder piston rod rubber seal are easy to age and leak under the open air operation, making the system pressure unstable; When the well is overhauled, the associated cluster wells are all shut down; the stroke height and the distance between the adjacent two wells are difficult to coordinate with the stroke control slide valve. When the stroke requirement is large, the well spacing is near, it cannot be equipped; the stroke height and the adjacent two ports The spacing of the wells is difficult to coordinate with the stroke control spools. When the stroke requirements are large, the well spacing is near and cannot be equipped.

Russian patent RU2205978C2 discloses a "chain-driven double-well pumping unit". The motor converts the rotary motion of the reducer from the driven shaft to the reciprocating wheel through a driving wheel mounted on the driven shaft of the reducer and a driven wheel on the housing. Movement, the driven wheel is rotatable relative to its geometrical axis, and is coupled to the driven wheel by a plate-like chain that is placed on the sprocket, and is connected to the plate-like chain from one side through the shaft pin hinge, and the other side is vertically mounted on the balance. The crank link at the lower end of the device can swing relative to the vertical plane, and through the fixed radial head, the movable radial head, the hanger, the sucker rod of the wellhead, the pulley, the hinge head, the bracket, the hanger, the linkage of the oil well, The pulley, hinge head and bracket are linked to the two (or four) pump rods of the pump. The main disadvantages are as follows: 1. Each steel part is subjected to long-term rigid gear chain friction friction wear under heavy load conditions, and the service life is reduced. 2. The plate chain, the pin hinge, the drive sprocket and the driven sprocket on the sprocket are exposed for a long time, and the dust and sand are easy to attach, causing wear and frequent maintenance. 3. When one well is being repaired, when another well is working normally, it is impossible to balance the weight and other devices.

Summary of the invention

The invention aims to provide a swing type double well arrangement pumping unit and a well assembly thereof, and solve the problem mentioned in the technical background (1), and solve the problem that the energy consumption on the other side of the beam pumping unit has not been done for a long time; (2) Solving the technical problems of high cost, poor practicability, frequent maintenance, complicated controller and complicated operation caused by frequent positive and negative reversal of the sprocket chain in the existing double well pumping unit. .

The technical solution provided by the present invention is as follows:

The swing type double well pumping unit is composed of a motor and one or more double well pumping units, and the double well pumping unit includes an A well bracket and a B well bracket, and a main crane is arranged in the middle of the A well bracket and the B well bracket. The special feature is that: the double well pumping unit further comprises a transmission shaft, a crank wheel, a crank connecting rod, a swing rod and a traction assembly, wherein the crank wheel is connected to the motor through the transmission shaft, and one end of the crank connecting rod and the crank wheel The other end is connected with the lower part of the swing rod through the shaft pin, and the swing head is horizontally fixed to the swing head of the main hanger. The upper part of the swing rod is fixedly butted with a swing head, and the swing head is provided with steel a wire rope hole, the traction assembly comprising a sheave disposed at the top of the A well support, a wire rope wound around the A well, a rope wheel at the top of the B well support, and a B well wire rope wound thereon, the A well One end of the wire rope and the B wire rope are fixedly linked with the wire rope hole, and the other end is respectively linked with the pumping rod of the corresponding oil well through respective suspension ropes.

The A well wire rope and the B well wire rope may also be selected from a thin steel wire belt or a multi-layer non-woven fabric belt. If the motor is a large torque switched reluctance motor or a permanent magnet homogenizing motor, the transmission shaft is a motor main shaft, and the crank wheel is coaxial with the motor main shaft; if the motor is an isoelectric motor, the output of the isoelectric motor is further A speed reducer is coupled, the drive shaft further includes an output shaft of the reducer, and the crank wheel is coaxial with the output shaft of the reducer.

The traction assembly further includes a traction compensation weight, the traction compensation weight is disposed at the oil well of the larger load, and the weighted wire rope is connected to the suspension rope and the suspension rope. For example, wells A and B work at the same time. When the load in well A is large, (for example, well A is an inclined well and well B is a straight well). On the right side of the A-well bracket, there is a traction compensation weight, and balance A. Part of the weight of the well ensures that the load under the suspension of the B well is in equilibrium with the load under the suspension of the A well.

The oscillating head is further provided with a pitch adjusting hole; when the wire rope hole is two or more, the adjusting hole can be doubled by the steel wire tying; the main pylon is provided with a utility for adjusting the oscillating bearing fixing Multiple swing head bearing holes in position. By selecting the pitch holes at different positions and the oscillating bearing holes, the strokes on both sides of A and B can be changed as needed (simultaneously or selectively).

A crank arm is fixedly disposed on the crank wheel, and the crank wheel is connected to the crank link via a shaft pin via a crank pin, and the connection between the crank arm and the crank link extends beyond the outer circumference of the crank wheel. The lower portion of the swinging rod is provided with a plurality of swing rod shaft pin holes for adjusting the fixed position of the swing rod shaft pin; the crank arm is provided with a plurality of shaft pin holes. When the crank link is required to have a large range of motion, it is only necessary to match the crank arm of sufficient length, and the end of the crank arm is connected to the crank link through the (crank arm) pin, so that the size of the crank wheel can be reduced.

The above-mentioned motor generally selects a permanent magnet homogenizing motor, and the crank wheel is coaxial with the permanent magnet coaxial motor spindle, which can eliminate the link of the reducer and maximize the working efficiency.

The above motor can also specifically adopt a switched reluctance motor, the overall efficiency is up to 95%; the stepless speed regulation is realized in the range of 0-maximum speed; the low starting current, the high starting torque, the starting current is lower than 30% of the rated current, The starting torque reaches 200% of the rated torque, and there is no difference in the starting current of the motor. Constant current 5-7 times phenomenon; frequent start and stop and forward and reverse conversion; control system circuit structure is simple, high reliability, motor rotor without winding, high mechanical strength; maintain constant torque operation within rated speed, speed 5质量。 The moment is stable, the speed fluctuation is less than 0.15%. The power factor is high and there is no need to increase the reactive power compensation device.

Both the A well bracket and the B well bracket top sheave are provided with a sheave seat and a sheave seat slide rail. The length of the sheave seat slide rail ensures that the sheave seat along the sheave seat slide rail can be from the side of the top of the well bracket Move to the other side; the mobile mode can be manually moved directly, or it can be rotated by the worm and worm; it is equipped with a workover counterweight for the workover.

The A well bracket and the B well bracket top may also be fixedly provided with a support plate, and the support plate is provided with a rotating shaft parallel to the rope wheel axis, so that the rope wheel can rotate on the vertical plane with the rotating shaft, which also ensures Give up space during workover.

When the oil well is arranged as a double-row well, the above-mentioned double-well pumping unit has a plurality of units, and the transmission shafts of each double-well pumping unit are sequentially connected in series through a coupling and a clutch, and the clutch has a clutch pedal. When a well needs to be repaired, the clutch pedal is depressed, the clutch is disengaged from transmitting power, the load is removed, and after the repair is completed, the power is transmitted through the clutch, and the pumping unit resumes operation. The invention has the following advantages:

1. A permanent magnet homogenizing motor directly drives the double well pumping. No need for frequent positive and negative reversal, the motor is in a uniform motion state, high operational reliability, easy control, and low maintenance cost.

2. Safe and quick unloading and loading, designed with counterweight compensation device. When a well needs to be repaired, there is no need to re-rope the rope, roping the rope, and quickly move the sheave seat to give up the maintenance space; and the other oil well and the counterweight compensation balance each other. , can work normally.

3. The two oil wells are driven by independent steel wire ropes. Avoid a sudden breakage of the sucker rod of one well and damage another well. This structure does not require rewinding of the wire rope to ensure the service life of the wire rope.

4. The crank wheel can be coaxial with the permanent magnet motor or the output shaft of the reducer driven by the different motor.

5. Turning the up and down reciprocating movement of the Shantou beam of the traditional speed reducer into the left and right swinging motion of the same motor without the reducer, saving 40-60%, reducing the weight of the equipment by 1/3. , the daily maintenance cost is reduced by about 1/2, and the capital cost is reduced by 1/2.

6. The production capacity of the pumping unit can be achieved even when the power source is a different speed motor with a reducer Double the load and reduce the energy consumption per unit of oil recovery by 1/2-1/3. The clutch, coupling and clutch pedal make the single swing double shaft form a row of double wells at the same time, increasing production. Reduce energy consumption and reduce maintenance and technical maintenance costs.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of Embodiment 1 of the present invention (a static equilibrium state when the load of the A well is larger than the load of the B well).

Fig. 2 is a schematic view showing the structure of the first embodiment of the present invention (a schematic diagram of the compensation weight of the A-side suspension traction when the A well is large).

Fig. ₃ is a schematic view showing the structure of the first embodiment of the present invention (a schematic diagram of the well-duty weighting suspension of the B-well side during the B-well work-over).

Fig. 4 is a schematic structural view of a first embodiment of the present invention (a schematic view of a main hanger).

Fig. 5 is a schematic view showing the structure of a second embodiment of the present invention.

Fig. 6 is a schematic structural view of Embodiment 3 of the present invention.

Fig. 7 is a schematic view showing another structure of the top of the stent of the present invention (taking the B well bracket as an example).

Description of the reference numerals:

1-motor, 2-drive shaft, 3-crank wheel, 4-crank arm, 5- (crank arm) axle pin, 6-crank connecting rod, 7-swing shaft pin, 8-swing bar, 901-left swing Head, 902-right swing head, 10-swing head bearing, 11- wire rope pitch hole, 1201-A oil well wire rope, 12011-A oil well weight wire rope, 1202-B oil well wire rope, 12022-B oil well weight wire rope, 131 -A sheave seat, 1311-A sheave seat slide, 1301-A shaft sheave, 13011-A well counterweight sheave, 132-B sheave seat, 1321-B sheave seat slide, 1302-B Well rope wheel, 13022-B well weight rope wheel, 1401-A well suspension rope, 1402-B well suspension rope, 1501-A well sucker rod, 1502-B well sucker rod, 1601-A well bracket , 1602-B well support, 1603-main hanger, 1701-A well compensation weight, 17011-A well workover weight, 1702-B well compensation weight, 17022-B well workover weight, 1801-A Well counterweight chute, 1802-B well counterweight chute, 19-control cabinet, 20-base, 21-clutch, 22-coupling, 23-clutch pedal; 24- (parallel to the axis of the sheave) Shaft; 321-oil drum (rope), 322-weight drum (weight rope) wheel).

L. When the workover counterweight suspension center is outside the oil well bracket (for the B well, that is, the right side of the B well bracket in the drawing), the distance between the center of the oil wellhead and the center of the workover counterweight during the workover; Generally should be greater than 500mm; S—When the workover weight suspension center is inside the oil well bracket (for the B well, that is, the left side of the B well bracket in the drawing), the distance between the center of the oil wellhead and the center of the workover weight at the workover; Since the distance between the oil well derrick and the center of the oil well is generally designed to be greater than 500 mm, naturally, the workover space is greater than 500 mm. detailed description

The crank wheel is used as the core transmission component, and the crank wheel is fixedly disposed on the crank wheel. One part of the crank arm extends out of the outer circumference of the crank wheel. Generally, the permanent magnet is used as the power source, and the permanent magnet is used as the power source. The drive shaft, the crank wheel and the permanent magnet of the permanent magnet motor are coaxial; or the isoelectric motor is selected as the power source, the crank wheel is coaxial with the power output shaft of the reducer driven by the different motor; and the crank connecting rod and the crank connecting rod are provided. One end is connected with the crank arm through the (crank arm) shaft pin, and the other end is coupled with the lower part of the swing rod through the swing rod axle pin; according to the working principle of the crank wheel, the cooperation of the crank link with the crank wheel and the swing rod should ensure that when the motor is The oscillating head can swing to the left and right in the vertical plane at the main hanger with the oscillating bearing as the yaw pivot at the time of forward or reverse rotation.

As shown in Figure 1 (when the load of well A is greater than the load of well B; if the load of two wells is equivalent, there is no need to suspend compensating weight 1701 and related rope 12011), swinging double well array pumping unit, including Drive mechanism and left and right swing mechanism, the crank wheel 3 on the drive shaft 2 of the motor 1 is equipped with a crank arm 4 connected to the crank link 6-end (crank arm) shaft pin 5, and the other end is connected to the swing pin and the swing rod 8 Connection, through the type of the crank wheel 3, the rotary motion is converted into a left and right reciprocating rocking motion. One end of the crank connecting rod is provided with a crank arm through a crank shaft pin, and the other end is connected to the swing rod through a shaft pin. The swing rod 8 is pivoted to the swing head bearing 10, and is rigidly fixed on the left and right swing heads 901 and 902. 10 is mounted on the main hanger 1603 which is swingable relative to the vertical plane, and the wire ropes 1201, 1202 of the left and right wells are respectively mounted on the adjusting hole 11 on the oscillating head, and the other end is connected and suspended by the sheaves 1301 and 1302 on the left and right brackets. The ropes 1401, 1402, the two pumping rods are linked, so that the motor rotates once and both pumping pumps are working. Thereby, the production capacity of the pumping unit can be doubled, and the energy consumption per unit of the oil recovery unit can be reduced by 1/2-1/3, and the single swinging double well of the clutch, the coupling and the clutch pedal form a column. Double-row wells work at the same time, increasing production, reducing energy consumption, and reducing maintenance and technical maintenance costs.

A plurality of pitch adjustment holes 11 may be disposed on the left and right swing heads 901 and 902. Different pitch control holes 11 may change the lift height of the sucker rods, and the A well shaft wire rope 1201 and the B oil well wire rope 1202 have one end from the respective The corresponding position adjusting hole 11 passes through, and the other end is connected to the A well suspension 1401 via the A well sheave 1301 on the A well bracket 1601, and the B well end passes the B well sheave 1302 and B on the B well bracket 1602. The well suspensor 1402 is connected.

The oscillating bearing 10 on the oscillating weight 8 also has a plurality of mounting positions, and the up and down movement of the selected mounting position changes the amplitude of the oscillating weight, thereby changing the lifting height of the sucker rod.

A well compensation weight 1701, B well compensation weight 1702, usually placed in A well support 1601 and B well support 1602, when one of the wells is significantly larger than the other well, take the corresponding weight configuration to compensate, such as A well, A oil well weight wire rope 12011, including A well weighting sheave 13011 disposed on the A well bracket 1601, and the A well weighting sheave 13011 is wound with an A well weight wire rope 12011, the A well is equipped with One end of the heavy wire rope 12011 is connected to the A well compensation weight 1701, and the other end of the A well weight wire rope 12011 is connected to the A well suspension 1401 via the A well weighting sheave 13011. (B well is also true)

As shown in Fig. 2, Fig. 3 and Fig. 4, the operation state of the other well while the well is being repaired is as shown in Fig. 2, Fig. 3 and Fig. 4. When the load is removed after the shutdown, the ferrule clamp is stuck on the polished rod and supported on the ground, on the suspension rope. The wire rope can be freely detached, and the A sheave seat 131 and the A sheave seat slide 1311 described above are not moved, and the B sheave seat 132 on the B well bracket 1602 is moved from the side of the B sheave seat slide 1321. On the other side of the bracket, the alignment screw hole is re-fixed to allow vertical space on the well, and the B well workover weight 17022 and the B well compensation weight 1702 are taken out from the bracket 1602. The suspension workover weight can be suspended by three types. Method, 1. The weight is suspended from the center of the wellhead (ie, the left side of the bracket 1602); 2. The weight can also be suspended at the distance L from the center of the wellhead (ie, the right side of the bracket 1602); At the same time, the weight is suspended at the L; in the method 1, when the S is suspended at the S, the B well weight wire rope 12022 is connected to the B well weight rope wheel 13022 and the wire rope pitch hole 11 is linked, and the other end is repaired with all the weights; 2 When reworking the L spacing, it is not necessary to re-rope After the load is removed from the suspension rope, the wire rope is unwound, and only the B sheave seat 132 is moved. The B oil well wire rope 1202 is unloaded from the other end of the B well suspension device 1402 by the load of the B well sucker rod 1502. Re-attach the counterweight corresponding to the workover, that is, the well D of the well B is 17022. The third method is to suspend the counterweight at the S and L positions. Immediately after the load is removed, the counterweight wire rope is put on, and the suspension is fitted. Heavy, at the same time, remove the suspension rope B oil well wire rope to hang up and take out the weight, the two weights at the same time balance with the A well load, so that it works normally. Re-reset after the completion of the workover.

A well weight chute 1801, B well weight chute 1802, can quickly weigh the weight (A well compensation weight 1701, A well workover weight 17011, B well compensation weight 1702, B well workover weight 17022,) from A The left side of the well bracket 1601, the B well bracket 1602 is moved to the right side.

As shown in Figure 7, the A well bracket and the B well bracket top may have another arrangement. During workover, after the suspension of the hanging rod is unloaded, the counterweight is hung on the bracket, and the angle of rotation of the pumping drum is from a1 to a2, which directly opens the workover space and quickly completes the sucker rod during workover. Unloading and counterweight loading, after the completion of the workover, unload the configuration block, restore the angle of the pumping drum, return from a2 to a, re-hang the pumping rod polished rod, and quickly restore the normal pumping state.

Example 2:

A swing type double well arrangement pumping unit applied to a double-row well, as shown in FIG. 5, a clutch 21, a coupling 22, a clutch pedal 23, the clutch 21 is provided with a crank wheel 3, a crank arm 4, ( a crank arm 5; the coupling 22 connects the transmission shaft 2 on the motor 1 at a multi-point, and the clutch pedal 23 disengages the transmission torque through the clutch pedal 23 when the load is removed, the one column The double-row wells transmit power in a positive and negative manner.

Example 3:

As shown in Fig. 6, another structure of a swinging double well (arrangement) pumping unit applied to a double well or a double row well still uses a crank wheel as a core component of the transmission mechanism, and is coaxial with the crank wheel. The 歩 motor shaft can also be the output shaft of the reducer, but this type of swaying double well (arrangement) pumping unit is especially used in the case of double well load balancing, especially for small pumping units with small strokes and high strokes. .

Claims

Claim

1. A swing type double well pumping unit, comprising: a motor and one or more double well pumping units, wherein the double well pumping unit comprises an A well bracket and a B well bracket, and the middle of the A well bracket and the B well bracket The utility model is provided with a main hanger, wherein: the double well pumping unit further comprises a transmission shaft, a crank wheel, a crank connecting rod, a swing rod and a traction assembly, wherein the crank wheel is connected with the motor through a transmission shaft, and one end of the crank connecting rod is The crank wheel is connected by a shaft pin, and the other end is connected to the lower part of the swing rod through a swing rod pin. The middle of the swing rod is provided with a swing head bearing horizontally fixed on the main hanger, and the upper part of the swing rod is fixedly butted with a swing head, and the swing head is arranged Provided with a wire rope hole, the traction assembly includes a sheave disposed at the top of the A well support, an A well wire rope wound thereon, a sheave at the top of the B well support, and a B well wire rope wound thereon, the A One end of the wire rope of the well and the wire rope of the B well are fixedly linked with the wire rope hole, and the other end is respectively linked with the pumping rod of the corresponding oil well through respective suspension ropes.

2. The swing type double well pumping unit according to claim 1, wherein: the motor is a coaxial motor, the drive shaft is a motor spindle, and the crank wheel is coaxial with the motor spindle; or the motor is The output motor of the isoelectric motor is further connected with a reducer, and the transmission shaft further includes an output shaft of the reducer, and the crank wheel is coaxial with the output shaft of the reducer.

3. The swing type double well pumping unit according to claim 2, wherein: the traction assembly further comprises a traction compensation weight, the traction compensation weight is set at a large load oil well, and the weighted steel wire rope The wraparound sheave is linked to the dangling.

4. The swing type double well pumping unit according to claim 3, wherein: the swing head is further provided with a pitch control hole; when the wire rope hole is two or more, the pitch adjustment The hole may be doubled by a wire rope hole; the main hanger is provided with a plurality of oscillating bearing holes for adjusting the fixed position of the oscillating bearing.

The swing type double well pumping unit according to claim 4, wherein: the crank wheel is fixedly provided with a crank arm, and the crank wheel is connected to the crank link via a shaft pin via a crank pin, the crank The joint of the arm and the crank link extends beyond the outer circumference of the crank wheel.

6. The swing type double well pumping unit according to claim 5, wherein: a lower portion of the swing lever is provided with a plurality of swing rod shaft pin holes for adjusting a fixed position of the swing rod shaft pin; Multiple shaft pin holes are provided.

7. The swing type double well pumping unit according to claim 6, wherein: said motor is Permanent magnets with the same motor.

8. The swing type double well pumping unit according to claim 6, wherein: said motor is a switched reluctance motor.

9. The swing type double well pumping unit according to claim 7 or 8, wherein: the shaft bracket and the sheave seat slide rail are disposed at the top of the A well bracket and the B well bracket, and the double well The pumping unit is equipped with a workover counterweight.

10. The swing type double well pumping unit according to claim 7 or 8, wherein: the A well bracket and the B well bracket top are fixedly provided with a support plate, and the support plate is provided with a rotation parallel to the rope axis. The shaft is such that the sheave is rotatable in a vertical plane with the axis of rotation.

11. The swing type double well pumping unit according to any one of claims 1 to 3, wherein: the double well pumping unit has a plurality of transmission shafts of each double well pumping unit through a coupling and The clutches are connected in series.

A swing type double well pumping unit according to claim 12, wherein: said clutch has a clutch pedal.