CN108457624B - Long-stroke oil pumping unit - Google Patents
Long-stroke oil pumping unit Download PDFInfo
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- CN108457624B CN108457624B CN201810415768.3A CN201810415768A CN108457624B CN 108457624 B CN108457624 B CN 108457624B CN 201810415768 A CN201810415768 A CN 201810415768A CN 108457624 B CN108457624 B CN 108457624B
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- 238000005086 pumping Methods 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 claims abstract description 68
- 239000000872 buffer Substances 0.000 claims description 27
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
A long-stroke pumping unit is composed of base, machine frame, sucker rod, the first and the second guide rails, counterweight, lifting pulley for sucker rod, lifting pulley for counterweight, drive wheel, flexible connector, supporter and power driver. The top of the sucker rod is fixedly connected with the tray of the sucker rod lifting pulley, the counterweight is arranged in the tray of the counterweight lifting pulley, two first composite roller bearings are respectively arranged in front and back of the inner side of the tray of the sucker rod lifting pulley to form two pairs of first composite roller bearings which are arranged in front and back in pairs, each pair of first composite roller bearings are respectively arranged in concave tracks of a pair of first guide rails, two second composite roller bearings are respectively arranged in front and back of the inner side of the tray of the counterweight lifting pulley to form two pairs of second composite roller bearings which are arranged in front and back in pairs, and each pair of second composite roller bearings are respectively arranged in concave tracks of a pair of second guide rails. The invention has the advantages of simple structure, large stroke, safety, reliability, low failure rate, energy conservation and long service life.
Description
Technical Field
The invention relates to an oil pumping unit, in particular to a long-stroke oil pumping unit.
Background
At present, the long-stroke (non-beam) pumping unit has the following components: ① A wide-belt type long-stroke pumping unit with a traditional motor speed reducer and a direct-drive motor (similar to a servo motor); ② The main problem with chain-type pumping units is that the chain is not durable because the chain is subjected to lateral bending stresses. The power is a conventional motor matched with a speed reducer; ③ Common motor and hydraulic pump drive the oil cylinder is a long-stroke oil pumping machine, the pumping unit has fixed piston rod and cylinder to move and drive pulley.
The inventors have retrieved the following related patent documents: CN201738896U discloses a long-stroke roller pumping unit comprising: the device comprises a base, a frame, a counterweight frame, a motor, a driving wheel, a driving belt fixing plate, a coupler and a speed reducer. The counterweight frame consists of profile steel, and weights with different weights are arranged in the counterweight frame to accurately adjust balance. The frame is composed of H-shaped steel, and is not only a bracket of the whole machine, but also a counterweight slideway, so that the structure is extremely concise. The hinge is arranged at the lower part of the frame and can be folded backwards, so that the transportation is convenient. The driving wheel can be finely adjusted back and forth, so that the suspension point is accurately aligned to the wellhead, the eccentric wear of a well rod is avoided, and the well repairing period is prolonged. CN201620834U discloses a kind of scissors type connecting rod beam-pumping unit, the lower end part of the support is fixed on the base, the base in the frame of the support is equipped with the motor, it is connected with the decelerator through the belt driving mechanism, the variable crank on the output shaft of the decelerator is connected with the groove type slide block through the connecting rod, the two sides of the groove type slide block are equipped with the guiding bearing and link to each other with the multi-stage four-bar driving mechanism through the push-pull rod, the upper end part of the multi-stage four-bar driving mechanism is equipped with the multi-channel tension spring, the other end of the multi-channel tension spring is connected with the spring fixing rod fixed under the movable pulley supporting rod, the two sides of the top end part of the support are equipped with the symmetrical balance weight wheel and the fixed pulley, the two wheels are connected with the suspension point load and the balance weight respectively through the balance weight rope. CN204186353U discloses a two-way pulley double-balanced type one-machine multi-well petroleum pumping unit, wire rope leading wheel is connected with the sucker rod through wire rope, the connecting rod links to each other with the coaster, the pulley of coaster supports on the guide rail, be fixed with the guide rail on the rail bracket, the crank is connected with the connecting rod, the motor links to each other with the reduction gear, the balancing weight is fixed at the sucker rod top, the frame bottom is fixed on prefabricated concrete basis through rag bolt, and the top bears moving system, the sucker tree is connected in the bottom of sucker rod. CN1944948a discloses a range-extending pumping unit, which consists of a closed tower, a motor, a combined V-belt, a belt wheel, a hard tooth surface cylindrical gear reducer, a crankshaft, a connecting rod, two lower chain wheels, two chains, a pulley, two expansion devices, two upper chain wheels, a steel wire rope, a front guide wheel, a rope hanger, a cross beam, a brake hub, a brake, two rails, four rollers and a counterweight.
The above technologies do not give specific guidance on how to make the pumping unit simple in structure, large in stroke, safe and reliable, low in energy consumption and long in service life.
Disclosure of Invention
The invention aims to solve the technical problems of providing a long-stroke pumping unit which is simple in structure, large in stroke, safe and reliable, low in failure rate, energy-saving, low in manufacturing cost and long in service life.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a long stroke beam-pumping unit (or super long stroke beam-pumping unit) has base, the frame of fixed mounting on the base, sucker rod, its technical scheme lies in: the long-stroke pumping unit is also provided with a pair of first guide rails (slide rails) fixedly arranged on the left side of the frame, a pair of second guide rails (slide rails) fixedly arranged on the right side of the frame, two pairs of first composite roller bearings, two pairs of second composite roller bearings, a counterweight, a sucker rod lifting pulley, a counterweight lifting pulley, a driving wheel, a flexible connecting piece matched with the driving wheel to form a pair of kinematic pairs, a bracket and a power driving device. The top of the sucker rod is fixedly connected with the tray of the sucker rod lifting pulley, the counter weights are arranged in the tray of the counter weight lifting pulley, two first composite roller bearings are respectively arranged in front of and behind the inner side of the tray of the sucker rod lifting pulley to form two pairs of first composite roller bearings which are arranged up and down in pairs, the mounting mode of each first composite roller bearing is welding, the shaft heads of the first composite roller bearings are welded with a plate with round holes, then the shaft heads are assembled and connected with the inner side of the tray of the sucker rod lifting pulley, each pair of first composite roller bearings corresponds to the first guide rails one by one, each pair of first composite roller bearings are respectively arranged in concave tracks of the first guide rails to enable the first guide rails to be in guide and limit the sucker rod lifting pulley, the inner side of the tray of the counter weight lifting pulley is respectively provided with two pairs of second composite roller bearings which are arranged up and down in pairs, the mounting mode of each second composite roller bearing is welding the shaft heads of the second composite roller bearing with the plate with the first guide rails, and the counter weight lifting pulley is correspondingly welded with the first guide rails of the first guide rails, and the counter weight lifting pulley is in the concave tracks of the first guide rails. The support is arranged on the frame, the driving wheel capable of rotating around the support is limited and supported by the support, the flexible connecting piece passes through the driving wheel, one end of the flexible connecting piece is connected with the tray of the sucker rod lifting pulley, the other end of the flexible connecting piece is connected with the tray of the counterweight lifting pulley, and the power output end of the power driving device is connected with the power input end of the driving wheel.
Among the above technical schemes, the preferred technical scheme can be: the number of driving wheels and flexible connecting pieces is preferably two. The driving wheel may be a circular chain wheel, and the flexible connecting piece is a circular chain, and each circular chain wheel is preferably provided with two driving grooves (four driving grooves are formed in the two circular chain wheels). The driving wheel may also be a roller sprocket, and the flexible connection member is a roller chain. The roller chain wheel is a plate roller chain wheel, and the flexible connecting piece is a plate roller chain. The driving wheel can also be a belt wheel, and the flexible connecting piece is a driving adhesive tape which is internally provided with a steel wire core. The concrete structure of the bracket mounted on the frame is that the top end of the frame is fixedly connected with a flat plate which is convenient to operate, the flat plate is an operation platform, the flat plate horizontally extends outwards from the front side, the rear side and the left side of the frame, a notch is formed in the flat plate at the position corresponding to the sucker rod lifting pulley, namely, a notch is formed in the flat plate at the opposite position above the sucker rod lifting pulley, a flexible connecting piece penetrates through the notch, the bracket is fixed on the upper end face of the flat plate, the bracket can be composed of a front longitudinal plate and a rear longitudinal plate, and the front longitudinal plate and the rear longitudinal plate can be respectively aligned with the front side and the rear side of the frame; the power driving device can be provided with a speed regulating motor, namely a speed regulating reversing motor (speed regulating direction regulating motor), a planetary gear reducer, and a base of the speed regulating motor and a base of the planetary gear reducer are fixedly arranged on the upper end face of the flat plate. Of course, the power drive is not limited to the several configurations described below, but is provided in a variety of different configurations. The base is preferably provided with a first group of buffers for preventing the sucker rod lifting pulley from falling and a second group of buffers for preventing the counterweight lifting pulley from falling, the first group of buffers are positioned under the tray of the sucker rod lifting pulley, the second group of buffers are positioned under the tray of the counterweight lifting pulley, and the first group of buffers and the second group of buffers are all a plurality of buffer hydraulic cylinders (for example, 2-3 buffer hydraulic cylinders). Each first composite roller bearing is provided with a main roller and a side roller. Each second composite roller bearing is provided with a main roller and a side roller, and each first composite roller bearing and each second composite roller bearing have the same structure. Each first composite roller bearing and each second composite roller bearing can adopt composite roller bearings produced by Changzhou jun special bearing limited company.
The long-stroke pumping unit also comprises a pair of first guide rails fixedly arranged on the left side of the frame, a pair of second guide rails fixedly arranged on the right side of the frame, two pairs of first composite roller bearings, two pairs of second composite roller bearings, a counterweight, a sucker rod lifting pulley, a counterweight lifting pulley, a driving wheel, a flexible connecting piece matched with the driving wheel to form a pair of kinematic pairs, a bracket and a power driving device. Thus, the two tracks and the four composite roller bearings form a sliding pair of the sucker rod lifting pulley which slides up and down, the other two tracks and the other four composite roller bearings form a sliding pair of the balance weight lifting pulley which slides up and down, so that the two pulleys can only move up and down according to the trend of the tracks (sliding rails), namely, the sucker rod lifting pulley moves up and down along the first guide rail, the balance weight lifting pulley moves up and down along the second guide rail, the purpose of using the sucker rod lifting pulley and the balance weight lifting pulley is to stabilize the motion track of the sucker rod, reduce lateral swing, effectively ensure the running stability of the sucker rod, avoid the sucker rod from being rubbed with a well wall due to lateral force, lead the sucker rod to prematurely fail and damage the well wall, prolong the service life, and ensure safer and more reliable work. The long-stroke pumping unit of the invention has the stroke which depends on the height and the strength of the frame, and the stroke can reach the corresponding height as long as the frame is made high enough, and the longer the stroke is, the longer the service life of the transmission chain (flexible connecting piece) is, and the higher the pumping efficiency is. The invention has simple structure, large stroke (ultra), safety and reliability, low failure rate (compared with the existing related pumping unit, the failure rate of the invention is reduced by more than 30 percent), convenient maintenance, light weight, low energy consumption (compared with the existing related pumping unit, the energy consumption of the invention is reduced by more than 25 percent), strong adaptability, small whole machine weight and low manufacturing cost (compared with the existing related pumping unit, the manufacturing cost of the invention is reduced by more than 28 percent), and long service life (compared with the existing related pumping unit, the service life of the invention is prolonged by more than 30 percent). The invention can realize mass production and achieve the purpose of high efficiency and energy saving.
In summary, the long-stroke pumping unit has the advantages of simple structure, large stroke (ultra-long stroke), safety, reliability, low failure rate, less maintenance, low energy consumption, energy conservation, small weight of the whole machine, low manufacturing cost and long service life.
Drawings
Fig. 1 is a schematic view (front view) of the structure of the present invention.
Fig. 2 is a view in the direction a in fig. 1 (top view, machine room 11 is omitted).
Fig. 3 is a schematic view (top view) of the structure of the invention in which the first rail is connected to the sucker rod lifting block and the second rail is connected to the counterweight lifting block.
FIG. 4 is a schematic view (top view) of a pair of first composite roller bearings mated with a pair of first guide tracks in accordance with the present invention; fig. 4 (a) is a schematic structural diagram of a first composite roller bearing matching with a corresponding first guide rail, and fig. 4 (b) is a schematic structural diagram of another first composite roller bearing matching with another first guide rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to examples. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, based on the embodiments of the invention, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the invention.
Example 1: as shown in fig. 1,2, 3 and 4, the long-stroke pumping unit according to the present invention has a base (foundation) 4, a frame 8 fixedly mounted on the base, a pumping rod 1, a pair of first guide rails 802 and 802 'fixedly mounted on the left side of the frame 8, a pair of second guide rails 803 and 803' fixedly mounted on the right side of the frame 8, two pairs of first composite roller bearings 201 and 201', two pairs of second composite roller bearings 601 and 601', a counterweight 7, a pumping rod lifting pulley 2, a counterweight lifting pulley 6, a driving wheel 9, a flexible connecting member 9 'cooperating with the driving wheel to form a pair of kinematic pairs, a pair of first and second composite roller bearings 201 and 201', a pair of second composite roller bearings, A bracket 10, and a power drive device (power source) 14. The frame 8 has a frame 800 with reinforcing ribs 801 on the frame 800. The first guide rails 802 and 802', the second guide rails 803 and 803' are fixed with the frame 8 into a whole, i.e. four pairs of slide rails, a frame and reinforcing ribs form the frame 8. The top of the sucker rod 1 (via the sucker rod holder 12) is fixedly connected with the tray of the sucker rod lifting pulley 2, the counterweight 7 is arranged in the tray of the counterweight lifting pulley 6, two first composite roller bearings are respectively arranged on the inner side (the inner side, i.e. the right side of the tray of the sucker rod lifting pulley) of the tray of the sucker rod lifting pulley 2 back and forth to form two pairs of first composite roller bearings 201 and 201' which are arranged up and down in pairs, the mounting mode of each first composite roller bearing is welding, and the specific mounting mode is to weld the shaft head of the first composite roller bearing and a plate with a round hole, and then the mounting mode is assembled and connected with the inner side of the tray of the sucker rod lifting pulley. each pair of first composite roller bearings 201, 201 'corresponds to the pair of first guide rails 802, 802', and each pair of first composite roller bearings 201, 201 'is respectively installed in the concave track of the pair of first guide rails 802, 802', so that the pair of first guide rails guides and limits the sucker rod lifting pulley 2. Two second composite roller bearings are respectively arranged on the front and back of the inner side of the tray of the counterweight lifting pulley 6 (the inner side is the left side of the tray of the counterweight lifting pulley) to form two pairs of second composite roller bearings 601 and 601' which are arranged up and down in pairs, each second composite roller bearing is arranged in a welding mode, and the specific installation mode is to weld a shaft head of the second composite roller bearing and a plate with a round hole, and then the shaft head and the plate are assembled and connected with the inner side of the tray of the counterweight lifting pulley. Each pair of second composite roller bearings 601, 601 'is in one-to-one correspondence with the pair of second guide rails 803, 803', and each pair of second composite roller bearings 601, 601 'is respectively installed in the concave track of the pair of second guide rails 803, 803', so that the pair of second guide rails guides and limits the counterweight lifting pulley 6. The vertical distance (vertical center distance) between the two pairs of first composite roller bearings may be about 1 meter, that is, the center distance between the upper pair of first composite roller bearings (i.e., the upper pair of first composite roller bearings) and the lower pair of first composite roller bearings (i.e., the lower pair of first composite roller bearings) may be about 1 meter. Two first guide rails of the pair of first guide rails are oppositely arranged (symmetrically arranged), and two second guide rails of the pair of second guide rails are oppositely arranged (symmetrically arranged). The two first compound roller bearings in each pair of first compound roller bearings are oppositely arranged (symmetrically arranged), and the two second compound roller bearings in each pair of second compound roller bearings are oppositely arranged (symmetrically arranged). The sucker rod lifting pulley 2 walks up and down along the first guide rail, the counterweight lifting pulley 6 walks up and down along the second guide rail, and the purpose of using the sucker rod lifting pulley and the counterweight lifting pulley is to stabilize the motion trail of the sucker rod, so that the lateral swing of the sucker rod lifting pulley is reduced, and the work is safer and more reliable. The support 10 is arranged on the frame 8, the driving wheel 9 which can rotate around the support 10 is limited and supported by the support, the flexible connecting piece 9' passes through the driving wheel 9, one end of the flexible connecting piece 9' is connected with the tray of the sucker rod lifting pulley 2, the other end of the flexible connecting piece 9' is connected with the tray of the counterweight lifting pulley 6, and the power output end of the power driving device 14 is connected with the power input end (power input shaft) of the driving wheel 9.
As shown in fig. 1,2,3 and 4, the number of the driving wheels 9 and the flexible connection members 9' may be two. The driving wheel 9 may be a circular sprocket, and the flexible connecting member 9' is a circular chain. Thus, two round-link chains (transmission chains) are simultaneously arranged, mainly considering the safety requirement, the safety coefficient of a single chain is not lower than 6 times, and the safety coefficient of two chains is not lower than 12 times. Two driving grooves (four driving grooves are formed in the two circular chain wheels) are formed in each circular chain wheel, and the circular chain is mainly convenient to replace. The specific structure of the bracket 10 mounted on the frame 8 may be that a top end (top) of the frame 8 is fixedly connected with a flat plate 13 which is convenient to operate, the flat plate 13 is an operation platform, the flat plate 13 extends horizontally outwards from the front side, the rear side and the left side of the frame 8, a gap is formed in the flat plate 13 corresponding to the sucker rod lifting pulley, that is, a gap is formed in the flat plate at the opposite position above the sucker rod lifting pulley, and a flexible connecting piece (round link chain) 9' passes through the gap. The bracket 10 is fixed on the upper end surface of the flat plate 13, and the bracket 10 is composed of a front longitudinal plate and a rear longitudinal plate which are respectively aligned with the front side and the rear side (can be) of the frame 800 of the stand 8. The power driving device 14 may have a speed-adjusting motor (speed-adjusting direction-adjusting motor, speed-adjusting direction-changing motor) 1401 and a planetary gear reducer 1402, wherein the base of the speed-adjusting motor 1401 and the base of the planetary gear reducer 1402 are fixedly mounted on the upper end surface of the flat plate (13). Thus, the circular chain wheel is driven by the speed-regulating (turning) motor and the speed-reducing device, so that the circular chain wheel drives the circular chain (strip) to rotate in the positive and negative directions, and the circular chain drives the sucker rod lifting pulley 2 and the counterweight lifting pulley 6 to move up and down to finish the up and down pumping work of the sucker rod. The motor in the power driving device needs to adopt a large torque motor with speed regulation and direction change functions, so that the motion track of the sucker rod is convenient to program and control, for example, the acceleration value is smaller when the upstroke of the sucker rod is started, the motor is stopped in advance when the upstroke of the sucker rod is close to the top dead center, and the kinetic energy and potential energy conversion is utilized, so that the reversing impact is avoided. The power driving device can also be a speed-regulating direction-regulating high-torque low-speed direct-drive motor, a speed reducer is omitted, and the speed reducer is connected with a power input end (a power input end of a circular chain wheel) of the driving wheel 9 through a coupling. Of course, the power driving device can also have other structures, for example, the power driving device can also be an outer rotor low-rotation speed-regulating direction-regulating motor, and the power driving device can be selectively installed according to the needs of users in practical application. The power drive is not limited to the above-described several configurations, but it has a plurality of different configurations. A box-type machine room 11 can also be fixed on the flat plate 13. The front side of the frame 8 is also provided with a maintenance cat ladder and a protective guard 15. The base 4 is provided with a first group of buffers 3 for preventing the sucker rod lifting pulley from falling and a second group of buffers 5 for preventing the counterweight lifting pulley from falling, the first group of buffers 3 is located under the tray of the sucker rod lifting pulley 2, the second group of buffers 5 is located under the tray of the counterweight lifting pulley 6, and the first group of buffers 3 and the second group of buffers 5 are all a plurality of (2-3) buffer hydraulic cylinders. Each of the first compound roller bearings 201 or 201' has a main roller 201a, a side roller 201b (and a stub shaft, etc.). Each of the second compound roller bearings 601 or 601' has a main roller, a side roller (and a shaft head, etc.), and each of the first compound roller bearings has the same structure as each of the second compound roller bearings itself. The first and second composite roller bearings can be composite roller bearings (commercial products) produced by Changzhou junda special bearing limited company.
Example 2: this embodiment is similar to embodiment 1, except that in this embodiment, the driving wheel 9 is a roller sprocket and the flexible connection member 9' is a roller chain. The roller chain wheel is a plate roller chain wheel, and the flexible connecting piece is a plate roller chain.
Example 3: this embodiment is similar to embodiment 1, except that in this embodiment, the driving wheel 9 is a belt wheel (rubber-covered wheel), the flexible connection member 9' is a transmission belt (belt), and the transmission belt has a steel wire core therein.
The invention is further illustrated below (see discussion below).
1. The invention has long stroke and enough stroke, and according to the oil pumping theory, the longer the stroke is, the lower the elastic tensile loss percentage of the sucker rod is, and the higher the efficiency of the stroke is. So as long as the manufacturing cost is not obviously increased, the weight of the whole machine is not obviously increased, and the larger the stroke is, the better the stroke is. The invention increases the weight of about 250 kg theoretically (the stroke is increased by one meter, four meters of round-link chains are needed to be added, the round-link chain weight of 30 meters is 18kg, four meters of C16 sliding rails are needed to be added, the weight of the rice is 32kg, the total weight is about 200kg, the reinforcing ribs are about 50 kg), the whole machine weight of 16 meters of stroke is about 6-10 tons, the weight is far lighter than that of a walking beam machine, the foundation and the transportation are completely bearable, and the increase of the manufacturing cost is very limited. Meanwhile, another important effect of increasing the stroke is that the service life of each moving part, such as guide rails, e.g. a transmission chain (sandwich belt), can be effectively prolonged, and the reversing times of a motor can be reduced.
2. The power driving device (power source, power system) is provided with: the driving power of the power driving device is mainly considered to adopt intelligent driving power, and is mainly characterized in that the driving power is controlled in a sectional manner in the whole stroke process, different accelerations and speeds are adopted, for example, the starting section is started by adopting a method of gradually increasing the accelerations, so that large current impact and stress impact on the sucker rod are avoided, and the service lives of the motor and the sucker rod are prolonged. In addition, the power system can fully meet the reversing requirement of up-and-down stroke, and the motor rotates positively and negatively to drive the driving chain (belt) wheel and the chain (sandwich belt) to drag the sucker rod and the counterweight to move up and down, so as to complete the oil pumping work. The connection between the motor and the driving wheel can take various forms, such as a mechanical speed reducer, a low-speed high-torque motor direct-drive driving wheel, or an outer rotor low-speed high-torque motor direct-drive, and the like, and the specific form is determined according to the use condition of a user. The selection of a proper power driving device is one of important preconditions for ensuring the long-time stable operation of the oil pumping unit.
3. The other important part of the invention for power transmission is a chain (or a sandwich belt), and the chain of the machine adopts a straight-pull type stress mode, is not stressed by side force and does not generate bending moment. The life of the chain (sandwich belt) will be greatly increased compared to the life of the chain subjected to lateral forces. When the chain is adopted, four chain driving gears are arranged, two chains are simultaneously arranged, and the other two chain wheels are convenient for replacing the chains for standby. The principle is also the same if a sandwich belt is used. As to whether a round-link chain or a plate-type roller chain is adopted, or a sandwich belt is determined according to actual specific conditions.
4. The invention adopts special rails and matched composite roller bearings (composite roller guide bearings), 2 composite roller bearings are welded on the side surface of the pulley corresponding to each rail, two rails and four composite roller bearings form a sliding pair of the sucker rod lifting pulley which slides up and down, and the other two rails and the other four composite roller bearings form a sliding pair of the counterweight lifting pulley which slides up and down, so that the two pulleys can only move up and down according to the trend of the rails (sliding rails), and the two pulleys drag the sucker rod and lift the counterweight respectively. The purpose of this design is that the coaster that makes take sucker rod and bear the weight can be steadily along the track up-and-down motion, can guarantee the stationarity of sucker rod operation effectively, avoids the sucker rod to receive the side force and take place the friction with the wall of a well, leads to the sucker rod to prematurely fail, and damage the wall of a well, has prolonged the life of sucker rod, and then has prolonged the life of complete machine. The counterweight is arranged so that the load of the motor tends to be consistent in the up-and-down running process (in the up-and-down stroke process) of the sucker rod, so that the power and the torque of the motor reach the most reasonable state, and the excessive power or overload of the motor is avoided.
5. The invention mainly adopts active safety measures from the safety point of view, for example, a transmission chain (belt) can take a relatively large safety factor, for example, the theoretical value is 12 times. And the base (or the ground) is provided with a first group of buffers for preventing the sucker rod lifting pulley from falling and a second group of buffers for preventing the counterweight lifting pulley from falling, and the first group of buffers and the second group of buffers are all a plurality of buffer hydraulic cylinders, so that the sucker rod well smashing accident can be prevented.
In summary, the long-stroke pumping unit has the advantages of simple structure, large stroke (long stroke), safety, reliability, low failure rate, less maintenance, low energy consumption, energy conservation, small weight of the whole machine, low manufacturing cost and long service life.
Claims (8)
1. The long-stroke pumping unit is provided with a base (4), a frame (8) fixedly arranged on the base and a pumping rod (1), and is characterized by also comprising a pair of first guide rails (802, 802 ') fixedly arranged on the left side of the frame (8), a pair of second guide rails (803, 803 ') fixedly arranged on the right side of the frame (8), two pairs of first composite roller bearings (201, 201 '), two pairs of second composite roller bearings (601, 601 '), a counterweight (7), a pumping rod lifting pulley (2), a counterweight lifting pulley (6), a driving wheel (9), a flexible connecting piece (9 ') matched with the driving wheel to form a pair of kinematic pairs, a bracket (10) and a power driving device (14);
The top of the sucker rod (1) is fixedly connected with the tray of the sucker rod lifting pulley (2), the balance weight (7) is arranged in the tray of the balance weight lifting pulley (6), two first composite roller bearings are respectively arranged at the front and back of the inner side of the tray of the sucker rod lifting pulley (2) to form two pairs of first composite roller bearings (201, 201 ') which are arranged up and down in pairs at the front and back, each pair of first composite roller bearings (201, 201 ') corresponds to the pair of first guide rails (802, 802 '), each pair of first composite roller bearings (201, 201 ') is respectively arranged in the concave track of the pair of first guide rails (802, 802 ') to lead the pair of first guide rails to guide and limit the sucker rod lifting pulley (2), two second composite roller bearings are respectively arranged at the front and back of the inner side of the tray of the balance weight lifting pulley (6) to form two pairs of second composite roller bearings (601, 601 ') which are arranged up and down in pairs at the front and back, each pair of second composite roller bearings (601, 601 ') corresponds to the pair of second guide rails (803, 803 ') to the pair of second guide rails (803) one by one, 803, and the pair of second guide rails (803 ') are respectively arranged in the concave track (803) of the pair of second guide rails (803);
The support (10) is arranged on the frame (8), the driving wheel (9) capable of rotating around the support (10) is limited and supported by the support, the flexible connecting piece (9 ') passes through the driving wheel (9), one end of the flexible connecting piece (9 ') is connected with the tray of the sucker rod lifting pulley (2), the other end of the flexible connecting piece (9 ') is connected with the tray of the counterweight lifting pulley (6), and the power output end of the power driving device (14) is connected with the power input end of the driving wheel (9);
The concrete structure of the bracket (10) mounted on the frame (8) is that the top end of the frame (8) is fixedly connected with a flat plate (13) which is convenient to operate, the flat plate (13) horizontally extends outwards from the front side, the rear side and the left side of the frame (8), the flat plate (13) is provided with a notch at the position corresponding to the sucker rod lifting pulley, a flexible connecting piece (9') passes through the notch, the bracket (10) is fixed on the upper end surface of the flat plate (13), the bracket (10) is composed of a front longitudinal plate and a rear longitudinal plate, and the front longitudinal plate and the rear longitudinal plate are respectively aligned with the front side and the rear side of the frame (800) of the frame (8);
The base (4) is provided with a first group of buffers (3) for preventing the sucker rod lifting pulley from falling and a second group of buffers (5) for preventing the counterweight lifting pulley from falling, the first group of buffers (3) are positioned under the tray of the sucker rod lifting pulley (2), the second group of buffers (5) are positioned under the tray of the counterweight lifting pulley (6), and the first group of buffers (3) and the second group of buffers (5) are all a plurality of buffer hydraulic cylinders.
2. A long-stroke pumping unit according to claim 1, wherein the number of driving wheels (9), flexible connection members (9') is two.
3. A long stroke pumping unit according to claim 1 or 2, wherein the driving wheel (9) is a circular sprocket and the flexible connection member (9') is a circular chain.
4. A long-stroke pumping unit according to claim 1 or 2, wherein the driving wheel (9) is a circular sprocket, the flexible connection member (9') is a circular chain, and each circular sprocket is provided with two driving grooves.
5. A long stroke pumping unit according to claim 1 or 2, wherein the driving wheel (9) is a roller sprocket and the flexible connection (9') is a roller chain.
6. A long stroke pumping unit according to claim 1 or 2, wherein the driving wheel (9) is a roller sprocket, i.e. a plate roller chain sprocket, and the flexible connection (9') is a plate roller chain.
7. A long stroke pumping unit according to claim 1 or 2, wherein the driving wheel (9) is a pulley, the flexible connecting member (9') is a transmission belt, and the transmission belt is internally provided with a steel wire core.
8. The long-stroke pumping unit as recited in claim 1, wherein the power driving device (14) comprises a speed-adjusting motor (1401) and a planetary gear reducer (1402), and a base of the speed-adjusting motor (1401) and a base of the planetary gear reducer (1402) are fixedly installed on an upper end surface of the plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415768.3A CN108457624B (en) | 2018-05-03 | 2018-05-03 | Long-stroke oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415768.3A CN108457624B (en) | 2018-05-03 | 2018-05-03 | Long-stroke oil pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108457624A CN108457624A (en) | 2018-08-28 |
| CN108457624B true CN108457624B (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810415768.3A Active CN108457624B (en) | 2018-05-03 | 2018-05-03 | Long-stroke oil pumping unit |
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| CN (1) | CN108457624B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578499A (en) * | 2019-08-19 | 2019-12-17 | 青岛北海俊惠电子仪表有限公司 | Hydraulic suction machine |
| CN112483047B (en) * | 2020-11-25 | 2022-06-03 | 瑞昌市森奥达科技有限公司 | Vertical lift type oil pumping machine |
| CN112814627A (en) * | 2021-03-22 | 2021-05-18 | 山东创新石油技术有限公司 | Electrically controlled reversing direct-drive beam pumping unit |
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| CN1031354C (en) * | 1992-07-05 | 1996-03-20 | 胜利石油管理局采油工艺研究院 | Chain type long stroke oil pumping machine |
| CN200968206Y (en) * | 2006-09-04 | 2007-10-31 | 高智 | Long stroke energy-saving oil pumping machine |
| CN203905911U (en) * | 2014-06-12 | 2014-10-29 | 常熟理工学院 | Long-stroke energy-saving pumping unit |
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| CN201934077U (en) * | 2010-12-30 | 2011-08-17 | 李骥 | Special pumping unit for offshore oil field |
| CN204212746U (en) * | 2014-11-14 | 2015-03-18 | 大庆丹诺石油科技开发有限公司 | Without beam type intelligent oil pumping machine |
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| CN108457624A (en) | 2018-08-28 |
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