AU2020204630A1 - A super-long stroke oil pumping unit - Google Patents

A super-long stroke oil pumping unit Download PDF

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Publication number
AU2020204630A1
AU2020204630A1 AU2020204630A AU2020204630A AU2020204630A1 AU 2020204630 A1 AU2020204630 A1 AU 2020204630A1 AU 2020204630 A AU2020204630 A AU 2020204630A AU 2020204630 A AU2020204630 A AU 2020204630A AU 2020204630 A1 AU2020204630 A1 AU 2020204630A1
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AU
Australia
Prior art keywords
counterweight
fixed
bracket
drum
rod
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AU2020204630A
Inventor
Eric Watson
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Oceanica Investments Pty Ltd
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Oceanica Invest Pty Ltd
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Priority claimed from AU2019904139A external-priority patent/AU2019904139A0/en
Application filed by Oceanica Invest Pty Ltd filed Critical Oceanica Invest Pty Ltd
Publication of AU2020204630A1 publication Critical patent/AU2020204630A1/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F04B47/026—Pull rods, full rod component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/14—Counterbalancing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Transmission Devices (AREA)

Abstract

C:\Interwo n\NRPortbI\DCC\EJL\19445802_l.docx-l1/4/2019 ABSTRACT This invention relates to a super-long stroke oil pumping unit, comprising an electric control cabinet, and a driving system on which a flexible polished rod is wound and to which a counterweight system is connected. The output end of the flexible polished rod is 5 wound on a supporting pulley and connected in turn to a rotary short connection, a sucker rod, a weighted rod, a super-long stroke pump. The regional central control room is connected, through a remote data wireless bridge, to the electric control cabinet connected to the driving system through a cable. The structure is used to improve the stroke of the pumping unit, eliminate the angle between the flexible polished rod and the head sheave, 10 extend the service life of the flexible polished rod, realize the counterweight of the super long stroke pumping unit, and further save energy. The pump efficiency, output, liquid level of annuluses and so on are represented through the electronic control cabinet. The pumping speed or intermittent pumping can be automatically adjusted according to the liquid supply data in order to realize long stroke, low stroke frequency, large displacement, 15 smart control, optimized oil extraction, longer periods of pipe rod replacement and pump inspection as well as remote digital control management.

Description

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A super-long stroke oil pumping unit
Technology discipline The invention relates to a rod pumping unit of an oil production system in petroleum field, in particular to a smart super-long stroke oil pumping unit.
Background technology At present, rod pumping equipment in oil field includes beam pumping unit, tower pumping unit and hydraulic pumping unit. The common shortcomings of the above equipment are the small stroke with the maximum stroke not more than 10 meters, the high stroke frequency with the average frequency about 6 times per minute even 9 times per minute individually, and the low displacement. The small stroke and high frequency make the time for the oil to enter the pump too short, resulting in the insufficient filling in the pump accompanied by impact load each time, low pump efficiency and system efficiency, heavy wear of rod, pipe and pump, frequent repair of pump, and high maintenance and operation cost. Moreover due to the elastic influence of sucker rod itself and the limitation of small stroke, the above equipment cannot be used for deep well pumping.
For the problems, in recent years, there is also the emergence of some super-long stroke pumping units. For example, the Chinese patent number 201520965060.7 makes public a utility model patent called "a long stroke pumping unit". The patented technical scheme adopts a winch, increasing the stroke of the pumping unit up to 50 meters. But there is still a drawback: the drum in this design can only rotate and not move along the axis. When rotating, the angle between the flexible polished rod on the drum and the slot of the head sheave on the wellhead bracket of the oil well would become larger and larger, and the slot edge of the head sheave squeezes or sticks the surface of the flexible polished rod more and more heavily, which would lead to the shorter and shorter service life of the flexible polished rod. Although the angle can be reduced by prolonging the distance between the drum and the head sheave to achieve the longer service life of the flexible polished rod, but the problem of the flexible polished rod damage cannot be completely solved, so that the
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application of the equipment in offshore platform is limited. In addition, the flexible polished rod is composed of metal and non-metallic materials, and the surface is of non-metallic material. Only one layer can be arranged on the surface of the drum under the load. Two or more layers arranged would damage the non-metallic material on the surface of the flexible polished rod by up and down extrusion, resulting in oil leakage at the wellhead packing box. The drum cannot be enlarged infinitely. Therefore, it is difficult to achieve a stroke of more than 50 meters, especially on a site with small area. Meanwhile, the long stroke pumping unit has no counterweight mechanism. Because of the lack of counterweight, it is necessary to configure the motor with high power, which does not achieve the maximum energy saving effect, so that the use of the equipment in deep well pumping is limited.
Invention content The purpose of the invention is to solve the defects existing in the prior art and to provide a smart super-long stroke pumping unit.
In order to achieve the above purpose, the technical proposal adopted by the invention is as follows:
A smart super-long stroke oil pumping unit includes a driving system on which a flexible polished rod is wound and to which a counterweight system is connected. The output end of the flexible polished rod is wound on a supporting pulley and connected in turn to a rotary short connection, a sucker rod, a weighted rod, a super long stroke pump.
Further, the counterweight system includes a counterweight bracket, an anti-drop rod, a self-locking device, a counterweight block, a moving pulley, a fixed pulley, a wire rope and a supporting pin. The lower end of the counterweight bracket is fixed on the pedestal, and the supporting pin is movably installed at the corresponding positions on both sides of the counterweight bracket. The lower end of the anti-drop rod is fixed on the pedestal, and the upper end is fixed at the top of the counterweight bracket with the anti-drop rod passing through the self-locking device and the
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counterweight block hole. The self-locking device is fixed at the lower end of the counterweight block. The moving pulley is fixed and mounted on the counterweight block, and the fixed pulley is fixed and mounted at the top of the counterweight bracket. One end of the wire rope is fixed at the top of the counterweight bracket, bypassing the moving pulley and the fixed pulley. And the other end of the wire rope is fixed with the counterweight drum of the driving system.
Further, the driving system includes a driving system bracket, a fixed pedestal, a limit frame, a lower roller train, a lower roller seat, an upper roller train, an upper roller seat, a movable pedestal, a rotating sensor, a shaft, the left seat, the left gear, a counterweight drum, a wire rope, a rolling bracket, a brake gear, a movable tongue, a winding drum, the right gear, the right seat, a deceleration motor, a lead screw seat, the right bearing block, the right concentric thrust bearing, the right nut gear, the left concentric thrust bearing, the left bearing block, left nut gear, a lead screw and a flexible polished rod.
The fixed pedestal is fixed at the top of the driving system bracket. The limit frame, the lower roller train and the lead screw bracket are fixed on the fixed pedestal. The lower roller seat and the upper roller train are respectively fixed at the top and bottom of the movable pedestal. The upper roller seat is fixed at the upper end of the limit frame. Several sets of the lower roller trains, the lower roller seats, the upper roller trains and the upper roller seats are installed to ensure that the movable pedestal moves back and forth along the axis of the shaft. The roller trains and the roller seats can also adopt closed lubricated linear guideway.
The left seat, the rolling bracket, the right seat and the movable tongue are fixed and installed on the movable pedestal. The speed sensor is installed on the shaft. And the shaft passes through the left bracket, the left gear, the counterweight drum, the rolling bracket, the brake gear, the winding drum, the right gear, the right bracket for being connected to the deceleration motor. The shaft is connected to the left bracket, the rolling bracket and the right bracket by rolling bearings. The speed sensor is installed at the left end of the shaft and rotates synchronously with the shaft. The deceleration
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motor is fixed on the right bracket. The motor shaft is connected with the shaft key and rotates synchronously. The left gear is fixed at the left end of the counterweight drum and rotates synchronously with the shaft fixed together. The brake gear and the right gear are fixed at both ends of the winding drum respectively and both rotate synchronously with the shaft fixed together.
Further, the counterweight drum has the surface machined with a spiral semicircular groove matching with the wire rope. The groove pitch on the surface of the counterweight drum is consistent with the diameter of the flexible polished rod. The groove surface is melted with wear-resistant, elastic and temperature-resistant non metallic material. One end of the wire rope is fixed on the counterweight drum and wound along the spiral semicircular groove. The winding drum has the surface machined with a spiral semicircular groove matching the flexible polished rod. The groove pitch on the surface of the winding drum is consistent with the diameter of the flexible polished rod. The groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material. One end of the flexible polished rod is fixed on the winding drum and wound along the spiral semicircular groove in the opposite direction of the wire rope wound on the counterweight drum.
The left gear with the left nut gear, and the right gear with the right nut gear engage according to the same specification and drive synchronously. The left nut gear and the right nut gear are installed on the lead screw with the matching thread. The lead screw thread pitch is consistent with the diameter of the flexible polished rod. On both sides of the nut gear there are the right concentric thrust bearings, the right bearing seats, the left concentric thrust bearings and the left bearing seats. The left and right bearing seats are fixed and mounted on the lower side of the movable pedestal. The lead screw is fixed and installed on the screw bracket, and the shaft is installed in parallel with the screw.
Further, the long-stroke pumping unit also includes an electric control cabinet. The regional central control room is connected, through a remote data wireless bridge, to the electric control cabinet connected to the driving system through a cable.
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Further, the flexible polished rod has one end fixed on the winding drum and the other end bypassing the groove of the support pulley downwards through the wellhead oil extraction tree into the oil pipe for connecting with the rotary short connection. The rotary short connection is connected with the upper end of the sucker rod. The lower end of the sucker rod is connected with the upper end of the weighted rod. The lower end of the weighted rod is connected with the piston, and the piston is placed in a multi-section super-long stroke pump cylinder.
Further, the electric control cabinet, the counterweight system and the driving system are all mounted on the pedestal on the concrete foundation next to the oil well. The support pulley is mounted on the upper end of the driving system bracket. The pulley on the support pulley is machined with a semicircular groove. The groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material. The flexible polished rod is exactly right embedded in the groove. The pressure sensor is mounted between the upper end of the driving system bracket and the bottom surface of support pulley frame seat.
Further, a wax scraper and a centralizer are added onto the sucker rod. The sucker rod is made of metal material or high-strength, tensile, wear resistant, acid and alkali resistant, and temperature resistance non-metallic material.
Further, the sucker rod adopts 20m to 100m long multi-segment wire rope. The rotary force produced by the wire rope when wound and released is eliminated by rotary short connection between the wire rope.
Further, the signals from the pressure sensor and the speed sensor are connected to the electric control cabinet.
In addition, another matching structure of counterweight drum and winding drum can be as follows: The counterweight drum is integrated with the winding drum. The middle part is the winding drum, and the two sides are the counterweight drum. The outer surfaces of
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both the counterweight drum and the winding drum are machined with semicircular thread grooves in the same turning direction. Groove surface is coated with melting wear resistant, elastic and temperature-resistant non-metallic material. And the groove pitch is consistent with the diameter of the flexible polished rod.
Two wire ropes in the counterweight system are respectively fixed on the counterweight drum on both sides of the winding drum, and the rolling bracket is between the winding drum and the counterweight drum.
The beneficial effects of the invention are: The structure of the present invention is used to improve the stroke of the pumping unit, eliminate the angle between the flexible polished rod and the head sheave, extend the service life of the flexible polished rod, realize the counterweight of the super-long stroke pumping unit, and further save energy. The pump efficiency, output, liquid level of annuluses and so on are represented through the electronic control cabinet. The pumping speed or intermittent pumping can be automatically adjusted according to the liquid supply data in order to realize long stroke, low stroke frequency, large displacement, smart control, optimized oil extraction, longer periods of pipe rod replacement and pump inspection as well as remote digital control management.
Description for figures Figure 1 is a front schematic diagram of the invention. Figure 2 is side schematic diagrams of the invention. Figure 3 is a structural schematic diagram of the driving system of the invention. Figure 4 is a structural schematic diagram of the counterweight system of the invention. Figure 5 is a schematic diagram of the matching between the counterweight drum and the winding drum in embodiment 2 of this invention.
Specific implementation mode As shown in figures 1 to 4, a smart super-long stroke oil pumping unit includes driving system 3 on which flexible polished rod 4 is wound and to which a
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counterweight system is connected. The output end of the flexible polished rod is wound on a supporting pulley and connected in turn to rotary short connection 7, sucker rod 8, weighted rod 9, super-long stroke pump 10.
The counterweight system 2 includes counterweight bracket 11, anti-drop rod 12, self-locking device 13, counterweight block 14, moving pulley 15, fixed pulley 16, wire rope 17 and supporting pin 18. The lower end of the counterweight bracket 11 is fixed on the pedestal, and the supporting pin 18 is movably installed at the corresponding positions on both sides of the counterweight bracket 11. The lower end of the anti-drop rod 12 is fixed on the pedestal, and the upper end is fixed at the top of the counterweight bracket 11 with the anti-drop rod 12 passing through the self locking device 13 and the counterweight block 14 hole. The self-locking device 13 is fixed at the lower end of the counterweight block 14. The moving pulley 15 is fixed and mounted on the counterweight block 14, and the fixed pulley 16 is fixed and mounted at the top of the counterweight bracket 11. One end of the wire rope 17 is fixed at the top of the counterweight bracket 11, bypassing the moving pulley 15 and the fixed pulley 16. And the other end of the wire rope 17 is fixed with the counterweight drum 31 of the driving system 3. There shall be at least two sets of anti-drop rods 12, self-locking devices 13, fixed and moving pulley blocks.
The driving system 3 includes driving system bracket 19, fixed pedestal 20, limit frame 21, lower roller train 22, lower roller seat 23, upper roller train 24, upper roller seat 25, movable pedestal 26, rotating sensor 27, shaft 28, the left seat 29, the left gear 30, counterweight drum 31, wire rope 17, rolling bracket 32, brake gear 33, movable tongue 34, winding drum 35, the right gear 36, the right seat 37, deceleration motor 38, lead screw seat 39, the right bearing block 40, the right concentric thrust bearing 41, the right nut gear 42, the left concentric thrust bearing 43, the left bearing block 44, left nut gear 45, lead screw 46 and flexible polished rod 4.
The fixed pedestal 20 is fixed at the top of the driving system bracket 19. The limit frame 21, the lower roller train 22 and the lead screw bracket 39 are fixed on the fixed pedestal 20. The lower roller seat 23 and the upper roller train 24 are
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respectively fixed at the top and bottom of the movable pedestal 26. The upper roller seat 25 is fixed at the upper end of the limit frame 21. Several sets of the lower roller trains 22, the lower roller seats 23, the upper roller trains 24 and the upper roller seats 25 are installed to ensure that the movable pedestal 26 moves back and forth along the axis ofthe shaft28.
The left seat 29, the rolling bracket 32, the right seat 37 and the movable tongue 34 are fixed and installed on the movable pedestal 26. The speed sensor 27 is installed on the shaft 28. And the shaft 28 passes through the left bracket 29, the left gear 30, the counterweight drum 31, the rolling bracket 32, the brake gear 33, the winding drum 35, the right gear 36, the right bracket 37 for being connected to the deceleration motor 38. The shaft 28 is connected to the left bracket 29, the rolling bracket 32 and the right bracket 37 by rolling bearings. The speed sensor 27 is installed at the left end of the shaft 28 and rotates synchronously with the shaft 28. The deceleration motor 38 is fixed on the right bracket 37. The motor shaft is connected with the shaft 28 key and rotates synchronously. The left gear 30 is fixed at the left end of the counterweight drum 31 and rotates synchronously with the shaft 28 fixed together. The brake gear 33 and the right gear 36 are fixed at both ends of the winding drum 35 respectively and both rotate synchronously with the shaft 28 fixed together.
The counterweight drum 31 has the surface machined with a spiral semicircular groove matching with the wire rope 17. The groove pitch on the surface of the counterweight drum 31 is consistent with the diameter of the flexible polished rod. The groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material. One end of the wire rope 17 is fixed on the counterweight drum 31 and wound along the spiral semicircular groove. The winding drum 35 has the surface machined with a spiral semicircular groove matching the flexible polished rod 4. The groove pitch on the surface of the winding drum 35 is consistent with the diameter of the flexible polished rod. The groove surface is melted with wear resistant, elastic and temperature-resistant non-metallic material. One end of the flexible polished rod 4 is fixed on the winding drum 35 and wound along the spiral
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semicircular groove in the opposite direction of the wire rope 17 wound on the counterweight drum 31.
The left gear 30 with the left nut gear 45, and the right gear 36 with the right nut gear 42 engage according to the same specification and drive synchronously. The left nut gear 45 and the right nut gear 42 are installed on the lead screw 46 with the matching thread. The lead screw thread pitch is consistent with the diameter of the flexible polished rod. On both sides of the nut gear there are the right concentric thrust bearings 41, the right bearing seats 40, the left concentric thrust bearings 43 and the left bearing seats 44. The left and right bearing seats are fixed and mounted on the lower side of the movable pedestal. The lead screw 46 is fixed and installed on the screw bracket 39, and the shaft 28 is installed in parallel with the screw 46.
In addition, the long-stroke pumping unit also includes electric control cabinet 1. The regional central control room is connected, through a remote data wireless bridge, to the electric control cabinet 1 connected to the driving system 3 through a cable. The flexible polished rod 4 has one end fixed on the winding drum 35 and the other end bypassing the groove of the support pulley 5 downwards through the wellhead oil extraction tree into the oil pipe for connecting with the rotary short connection 7. The rotary short connection 7 is connected with the upper end of the sucker rod 8. The lower end of the sucker rod 8 is connected with the upper end of the weighted rod 9. The lower end of the weighted rod 9 is connected with the piston, and the piston is placed in a multi-section super-long stroke pump 10 cylinder.
The electric control cabinet 1, the counterweight system 2 and the driving system 3 are all mounted on the pedestal on the concrete foundation next to the oil well. The support pulley 5 is mounted on the upper end of the driving system bracket. The pulley on the support pulley 5 is machined with a semicircular groove. The groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material. The flexible polished rod 4 is exactly right embedded in the groove. The pressure sensor 6 is mounted between the upper end of the driving system bracket 19 and the bottom surface of support pulley 5 frame seat.
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Further, a wax scraper and a centralizer are added onto the sucker rod. The sucker rod is made of metal material or high-strength, tensile, wear resistant, acid and alkali resistant, and temperature resistance non-metallic material.
In the invention, the sucker rod adopts 20m to 100m long multi-segment wire rope. The rotary force produced by the wire rope when wound and released is eliminated by rotary short connection between the wire rope.
When the pumping unit works and the super-long stroke pump 10 piston goes up, the electric control cabinet 1 sends the planet deceleration motor 38 signal. The motor drives the left gear 30, the counterweight drum 31, the winding drum 35, the right gear 36 and the speed sensor 27 to rotate synchronously. The flexible polished rod 4 goes up wound in the groove of the winding drum 35. The wire rope 17 releases the counterweight block 14 from the groove of the counterweight drum 31 down. The left gear 30 and the right gear 36 respectively drive the left nut gear 45 and the right nut gear 42 to rotate synchronously. When the winding drum 35 rotates a turn, the nut gear exactly rotates a turn. The nut gear pushes the concentric thrust bearing to push the bearing seat. The bearing seat driving the movable pedestal 26 as well as the winding drum 35, the deceleration motor 38 and other parts on the movable pedestal move a width equal to the diameter of the flexible polished rod 4 just along the axis of the lead screw 46. When the super-long stroke pump 10 piston goes down, deceleration motor 38 drives left gear 30, counterweight drum 31, winding drum 35, right gear 36 and speed sensor 27 for synchronous reverse rotation. The above actions are reversely repeated, so that the position of the flexible polished rod 4 in or out of the drum is always unchanged. Thus it is avoided to form angle between flexible polished rod 4 and the groove of support pulley 5 and bring damage.
In addition, when the electric control cabinet 1 sends a signal to the deceleration motor 38 through the cable, the deceleration motor 38 drives the winding drum 35 and the counterweight drum 31 to rotate. The winding drum 35 pulls the flexible polished rod 4 which is gradually wound on the winding drum 35. The flexible
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polished rod 4 drives the sucker rod 8 and the weighted rod 9, and the piston goes up. Oil at the upper of the piston is lifted out. The counterweight drum 31 rotating synchronously with the winding drum 35 gradually releases the steel wire rope 17 in rolling connection with the counterweight block 14 connected in the counterweight system 2. The counterweight block 14 goes down. The counterweight pulling force is transmitted to the counterweight drum 31 and the winding drum 35 through the steel wire rope 17, in the opposite direction of the pulling force acting on the winding drum 35 by the flexible polished rod 4. The deceleration motor 38 rotates reversely, and releases the flexible polished rod 4. The piston goes down. The counterweight drum 31 winds the wire rope 17, and the counterweight block 14 goes up. The deceleration motor 38 drives the winding drum 35, the counterweight drum 31. For rotating a turn, the deceleration motor 38, the winding drum 35, the counterweight drum 31 and the movable pedestal move together a size of the diameter of flexible polished rod 4 along the axis. So the position of releasing the flexible polished rod by the winding drum 35 remains unchanged. The speed sensor 27 is fixed at one end of the shaft 28. The data collected by the pressure sensor 6 and the speed sensor 27 are transmitted to the electric control cabinet 1. The electronic control cabinet 1 controls the speed of the deceleration motor 38 according to the data.
Embodiment 2 As shown in figure 5, the difference between this embodiment and Embodiment 1 is that the counterweight drum 31 is integrated with the winding drum 35.
The middle part is the winding drum 35, and the two sides are the counterweight drum 31. The outer surfaces of both the counterweight drum 31 and the winding drum 35 are machined with semicircular thread grooves in the same turning direction. Groove surface is coated with melting wear-resistant, elastic and temperature-resistant non-metallic material. And the groove pitch is consistent with the diameter of the flexible polished rod 4. Two wire ropes in the counterweight system are respectively fixed on the counterweight drum 31 on both sides of the winding drum 35, and the rolling bracket 32 is between the winding drum 35 and the counterweight drum 31, so as to achieve the balance between the winding pulling force and the counterweight pulling force.
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The structure of the present invention is used to improve the stroke of the pumping unit, eliminate the angle between the flexible polished rod and the head sheave, extend the service life of the flexible polished rod, realize the counterweight of the super-long stroke pumping unit, and further save energy. The pump efficiency, output, liquid level of annuluses and so on are represented through the electronic control cabinet. The pumping speed or intermittent pumping can be automatically adjusted according to the liquid supply data in order to realize long stroke, low stroke frequency, large displacement, smart control, optimized oil extraction, longer periods of pipe rod replacement and pump inspection as well as remote digital control management. Deep well, ultra-deep well, offshore rod pump oil production can be realized.
The basic principle, main characteristics and advantages of the invention are shown and described above. The technical personnel of the industry should understand that the invention is not limited by the above embodiment. The embodiment and the specification describe only the principle of the invention. Without departing from the spirit and scope of the invention, the invention will also have various changes and improvements which fall into the scope of the invention for protection. The scope of protection required by the invention is defined by the attached Claim of Rights and its equivalents.

Claims (10)

C:\Interwo n\NRPortbl\DCC\EJL\19445802_l.docx-l1/4/2019 - 13 THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A super-long stroke oil pumping unit comprising a driving system on which a flexible polished rod is wound and to which a counterweight system is connected, and an output end of the flexible polished rod is wound on a supporting pulley and connected in turn to a rotary short connection, a sucker rod, a weighted rod and a super-long stroke
pump.
2. A super-long stroke oil pumping unit according to Claim 1, wherein the counterweight system includes a counterweight bracket, an anti-drop rod, a self-locking device, a counterweight block, a moving pulley, a fixed pulley, a wire rope and a supporting pin, wherein a lower end of the counterweight bracket is fixed on a pedestal, and a supporting pin is movably installed at the corresponding positions on both sides of the counterweight bracket, wherein a lower end of the anti-drop rod is fixed on the pedestal, and an upper end of the anti-drop rod is fixed at a top of the counterweight block with the anti-drop rod passing through the self-locking device and a hole of the counterweight block, wherein the self-locking device is fixed at a lower end of the counterweight block, wherein the moving pulley is fixed and mounted on the counterweight block, and the fixed pulley is fixed and mounted at the top of the counterweight bracket, wherein one end of the wire rope is fixed at the top of the counterweight block, bypassing the moving pulley and the fixed pulley, and wherein the other end of the wire rope isfixed with the counterweight block of the driving system.
3. A super-long stroke oil pumping unit according to Claim 2, wherein the driving system comprises a driving system bracket, a fixed pedestal, a limit frame, a lower roller train, a lower roller seat, an upper roller train, an upper roller seat, a movable pedestal, a rotating sensor, a shaft, the left seat, the left gear, a counterweight drum, a wire rope, a rolling bracket, a brake gear, a movable tongue, a winding drum, the right gear, the right seat, a deceleration motor, a lead screw seat, the right bearing block, the right concentric thrust bearing, the right nut gear, the left concentric thrust bearing, the left bearing block,
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left nut gear, a lead screw and a flexible polished rod, wherein the fixed pedestal is fixed at the top of the driving system bracket, the limit frame, the lower roller train and the lead screw bracket are fixed on the fixed pedestal, the lower roller seat and the upper roller train are respectively fixed at the top and bottom of the movable pedestal, the upper roller seat is fixed at the upper end of the limit frame, several sets of the lower roller trains, the lower roller seats, the upper roller trains and the upper roller seats are installed to ensure that the movable pedestal moves back and forth along the axis of the shaft, and the roller trains and the roller seats can also adopt closed lubricated linear guideway, the left seat, the rolling bracket, the right seat and the movable tongue are fixed and installed on the movable pedestal, the speed sensor is installed on the shaft. And the shaft passes through the left bracket, the left gear, the counterweight drum, the rolling bracket, the brake gear, the winding drum, the right gear, the right bracket for being connected to the deceleration motor, the shaft is connected to the left bracket, the rolling bracket and the right bracket by rolling bearings, the speed sensor is installed at the left end of the shaft and rotates synchronously with the shaft, the deceleration motor is fixed on the right bracket, the motor shaft is connected with the shaft key and rotates synchronously, the left gear is fixed at the left end of the counterweight drum and rotates synchronously with the shaft fixed together, the brake gear and the right gear are fixed at both ends of the winding drum respectively and both rotate synchronously with the shaft fixed together.
4. A super-long stroke oil pumping unit according to Claim 3, wherein the counterweight drum with the surface machined with a spiral semicircular groove matching with the wire rope, and the winding drum with the surface machined with a spiral semicircular groove matching the flexible polished rod, the groove pitch on the surface of the counterweight drum is consistent with the diameter of the flexible polished rod, the groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material, one end of the wire rope is fixed on the counterweight drum and wound along the spiral semicircular groove, the groove pitch on the surface of the winding drum is consistent with the diameter of the flexible polished rod, the groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material, one end of the flexible polished rod is fixed on the winding drum and wound along the spiral semicircular
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groove in the opposite direction of the wire rope wound on the counterweight drum, the left gear with the left nut gear, and the right gear with the right nut gear engage and drive synchronously, the left nut gear and the right nut gear are installed on the lead screw with the matching thread, the lead screw thread pitch is consistent with the diameter of the flexible polished rod, on both sides of the nut gear there are the right concentric thrust bearings, the right bearing seats, the left concentric thrust bearings and the left bearing seats, the left and right bearing seats are fixed and mounted on the lower side of the movable pedestal, the lead screw is fixed and installed on the screw bracket, and the shaft is installed in parallel with the screw.
5. A super-long stroke oil pumping unit according to Claim 4, wherein the long stroke pumping unit also including an electric control cabinet, the regional central control room is connected, through a remote data wireless bridge, to the electric control cabinet connected to the driving system through a cable.
6. A super-long stroke oil pumping unit according to Claim 4, wherein the flexible polished rod with one end fixed on the winding drum and the other end bypassing the groove of the support pulley downwards through the wellhead oil extraction tree into the oil pipe for connecting with the rotary short connection, the rotary short connection is connected with the upper end of the sucker rod, the lower end of the sucker rod is connected with the upper end of the weighted rod, the lower end of the weighted rod is connected with the piston, and the piston is placed in a multi-section super-long stroke pump cylinder.
7. A super-long stroke oil pumping unit according to Claim 5, wherein the electric control cabinet, the counterweight system and the driving system all mounted on the pedestal on the concrete foundation next to the oil well, the support pulley is mounted on the upper end of the driving system bracket, the pulley on the support pulley is machined with a semicircular groove, the groove surface is melted with wear-resistant, elastic and temperature-resistant non-metallic material, the flexible polished rod is
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embedded in the groove, the pressure sensor is mounted between the upper end of the driving system bracket and the bottom surface of support pulley frame seat.
8. A super-long stroke oil pumping unit according to Claim 4, wherein the sucker rod with a wax scraper and a centralizer, the sucker rod is made of metal material or high strength, tensile, wear resistant, acid and alkali resistant, and temperature resistance non metallic material.
9. A super-long stroke oil pumping unit according to Claim 8, wherein the sucker rod adopting 20m to 100m long multi-segment wire rope, the rotary force produced by the wire rope when wound and released is eliminated by rotary short connection between the wire rope.
10. A super-long stroke oil pumping unit according to Claim 7, wherein the signals from the pressure sensor and the speed sensor connected to the electric control cabinet, the counterweight drum is integrated with the winding drum, the middle part is the winding drum, and the two sides are the counterweight drum, the outer surfaces of both the counterweight drum and the winding drum are machined with semicircular thread grooves in the same turning direction, groove surface is coated with melting wear-resistant, elastic and temperature-resistant non-metallic material, the groove pitch is consistent with the diameter of the flexible polished rod, two wire ropes in the counterweight system are respectively fixed on the counterweight drum on both sides of the winding drum, and the rolling bracket is between the winding drum and the counterweight drum.
AU2020204630A 2019-11-04 2020-07-10 A super-long stroke oil pumping unit Pending AU2020204630A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2019904139 2019-11-04
AU2019904139A AU2019904139A0 (en) 2019-11-04 A super-long stroke oil pumping unit

Publications (1)

Publication Number Publication Date
AU2020204630A1 true AU2020204630A1 (en) 2021-05-20

Family

ID=75911130

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2020204630A Pending AU2020204630A1 (en) 2019-11-04 2020-07-10 A super-long stroke oil pumping unit

Country Status (1)

Country Link
AU (1) AU2020204630A1 (en)

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