CN212202013U - Ultra-long stroke oil pumping machine - Google Patents

Abstract

The utility model provides an ultra-long stroke oil pumping unit, which relates to the technical field of oil and gas exploitation and comprises a frame, a rotating device, a counterweight device and a flexible polished rod; the rotary device comprises a roller and a driving mechanism which are in transmission connection, the roller is pivoted to the rack, and the driving mechanism is used for driving the roller to rotate relative to the rack; the counterweight device comprises a movable pulley and a pulley rope connected with the movable pulley, one end of the pulley rope is fixed relative to the frame, and the other end of the pulley rope is fixedly connected with the roller; one end of the flexible polished rod is fixed on the roller, and the other end of the flexible polished rod is connected with the sucker rod to drive the sucker rod to do up-and-down reciprocating motion. The technical problem that the conventional pumping unit in the prior art is small in stroke and low in pumping efficiency is solved.

Description

Ultra-long stroke oil pumping machine

Technical Field

The utility model belongs to the technical field of oil gas exploitation technique and specifically relates to a super long stroke beam-pumping unit is related to.

Background

With the continuous deep development of oil fields, deep wells and heavy oil wells increase year by year, and the problems of large stroke loss, low pump efficiency, high energy consumption, serious abrasion of sucker rods and the like exist by utilizing the oil extraction mode of low load, short stroke and fast stroke frequency of the conventional beam pumping unit, so that the requirements of the existing processes of low permeability, deep pumping and the like of the oil wells cannot be met.

In the general art, stroke loss can be said to be one of the most important factors affecting pump efficiency. The difference between the polished rod stroke and the plunger stroke caused by the elastic expansion of the sucker rod and the tubular column causes the reduction of effective stroke, at the moment, the stroke loss is larger, and the pump efficiency is lower.

However, the pumping efficiency of the conventional beam pumping unit is only about 70% (deep pumping well, thick oil well or even less than 50%), so that the effective stroke is small and the pumping efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an overlength stroke beam-pumping unit to the stroke of alleviating the conventional beam-pumping unit that exists among the prior art is less, leads to the lower technical problem of pump efficiency.

The embodiment of the utility model provides an overlength stroke beam-pumping unit, include: the device comprises a rack, a rotating device, a counterweight device and a flexible polished rod;

the rotary device comprises a roller and a driving mechanism which are in transmission connection, the roller is pivoted to the rack, and the driving mechanism is used for driving the roller to rotate relative to the rack;

the counterweight device comprises a movable pulley and a pulley rope connected with the movable pulley, one end of the pulley rope is fixed relative to the rack, and the other end of the pulley rope is fixedly connected with the roller;

one end of the flexible polished rod is fixed on the roller, and the other end of the flexible polished rod is connected with the sucker rod to drive the sucker rod to reciprocate up and down.

Further, the rack comprises a base, a vertical truss and a top seat which are connected from bottom to top;

the roller is located at the top seat.

Further, the top seat comprises a top platform and a guardrail arranged on the side surface of the top platform in an enclosing manner;

the roller is pivoted to a roller frame, and the roller frame is fixedly connected to the top end platform.

Further, the driving mechanism comprises a motor, the motor is mounted on the top seat, and the motor is in transmission connection with the roller;

or, actuating mechanism includes motor and drive assembly, the motor passes through drive assembly with the cylinder transmission is connected, drive assembly adopts belt subassembly, chain subassembly, reduction gear or shaft coupling.

Further, the counterweight device also comprises a pulley bracket and a counterweight box;

the movable pulley is pivoted to the pulley support, and the pulley support is fixedly connected with the weight box.

Furthermore, a guide rail is arranged in the vertical truss along the height direction, and the weight box is connected to the guide rail in a sliding mode.

Furthermore, the ultra-long stroke oil pumping unit also comprises a righting device;

the righting device comprises a righting wheel used for guiding the flexible polished rod, and the righting wheel rotates relative to the vertical truss;

the heights of the righting wheel and the movable pulley are lower than the height of the roller, and the roller is positioned between the righting wheel and the movable pulley.

Further, the righting device further comprises a first connecting rod and a second connecting rod;

one end of the first connecting rod is hinged to one side of the vertical truss through a first hinge shaft and can rotate relative to the first hinge shaft, and the other end of the first connecting rod is hinged to the central part of the righting wheel through a second hinge shaft;

one end of the second connecting rod is hinged to one side of the vertical truss through a third hinge shaft, and the other end of the second connecting rod is hinged to the first connecting rod through a fourth hinge shaft;

the first connecting rod, the second connecting rod and the vertical truss form a triangular structure.

Furthermore, the flexible polished rod is formed by pressing a polymer composite material;

the pulley rope is a steel wire rope, a belt or a composite material lifting rope.

Further, the super-long stroke pumping unit further comprises a cage ladder arranged on one side of the rack, and the cage ladder is arranged along the height direction of the rack in an extending mode.

Has the advantages that:

the utility model provides an overlength stroke beam-pumping unit, including frame, slewer, counter weight device and flexible polished rod, wherein, the counter weight device includes the movable pulley and connects in the pulley rope of movable pulley, and the relative frame of one end of pulley rope is fixed, other end fixed connection in cylinder to, the one end of flexible polished rod is fixed in the cylinder, and the other end is used for linking to each other with the sucker rod. Because the roller, the movable pulley and the pulley rope are matched together to form a movable pulley block structure, according to the motion characteristics of the movable pulley block structure, the roller is pivoted to the rack, when the roller rotates under the drive of the driving mechanism, the flexible polished rod drives the sucker rod to realize vertical reciprocating motion, and in the process, the displacement of the movable pulley and the displacement of the sucker rod are in a double relation.

According to the ultra-long stroke pumping unit, the flexible polished rod and the movable pulley block structure are arranged, so that the overall height of the pumping unit can be reduced, and the stroke length can be increased. By increasing the stroke length, the stroke loss can be effectively reduced, and the purpose of improving the pump efficiency is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of an ultra-long stroke pumping unit provided in an embodiment of the present invention;

fig. 2 is a side view of an ultra-long stroke pumping unit provided by the embodiment of the present invention.

Icon:

100-a frame; 110-a base; 120-vertical truss; 131-a top platform; 132-a guardrail;

200-a turning gear; 210-a roller; 220-a motor;

300-a counterweight arrangement; 310-a movable pulley; 320-pulley cord; 330-a pulley bracket; 340-weight box; 350-an adjusting seat;

400-flexible polished rod;

500-a guide rail;

600-a righting device; 610-a righting wheel; 620-a first link; 630-a second link;

700-cage ladder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present embodiment provides an ultra-long stroke pumping unit, as shown in fig. 1 and 2, the ultra-long stroke pumping unit includes a frame 100, a rotating device 200, a counterweight device 300, and a flexible polished rod 400; the rotating device 200 comprises a roller 210 and a driving mechanism, wherein the roller 210 is in transmission connection with the rack 100, and the driving mechanism is used for driving the roller 210 to rotate relative to the rack 100; the counterweight device 300 includes a movable pulley 310 and a pulley rope 320 connected to the movable pulley 310, one end of the pulley rope 320 is fixed with respect to the frame 100, and the other end is fixedly connected to the drum 210; one end of the flexible polish rod 400 is fixed to the roller 210, and the other end is used for connecting with the sucker rod to drive the sucker rod to reciprocate up and down.

According to the ultra-long stroke pumping unit provided by the embodiment, the roller 210, the movable pulley 310 and the pulley rope 320 are matched together to form a movable pulley block structure, and according to the movement characteristics of the movable pulley block structure, the roller 210 is pivoted to the rack 100, when the roller 210 rotates under the driving of the driving mechanism, the flexible polished rod 400 drives the sucker rod to realize up-and-down reciprocating motion, and in the process, the displacement of the movable pulley 310 and the displacement of the sucker rod are in a double relation.

By the flexible polished rod 400 and the movable pulley block structure, the ultra-long stroke pumping unit can reduce the overall height of the pumping unit and increase the stroke length. By increasing the stroke length, the stroke loss can be effectively reduced, and the purpose of improving the pump efficiency is achieved.

In addition, the embodiment adopts the ultra-long flexible polished rod 400, has bending resistance, small curvature radius and small surface roughness, and can well replace the original spray-welded polished rod.

Further, the circumferential surface of the roller 210 is further provided with a groove, and the groove can play a certain guiding role for the movement of the flexible polish rod 400 and the pulley rope 320, so that the flexible polish rod 400 or the pulley rope 320 can be prevented from shifting when ascending and descending, and the sucker rod can not shake greatly.

As shown in fig. 2, the rack 100 includes a base 110, a vertical truss 120 and a top base connected from bottom to top; the rollers 210 are located at the top base, and adopt a tower-type top driving structure as shown in fig. 2, which is not limited by well site conditions and occupies a small space.

Specifically, the top seat comprises a top platform 131 and a guardrail 132 surrounding the side surface of the top platform 131; the roller 210 is pivotally connected to a roller frame, which is fixedly connected to the top platform 131.

In this embodiment, the driving mechanism includes a motor 220 and a transmission assembly, the motor 220 is in transmission connection with the drum 210 through the transmission assembly; wherein, the transmission assembly adopts a belt assembly, a chain assembly, a speed reducer or a coupling.

In short, when the electric control system controls the motor 220 to rotate forward and backward, the motor 220 drives the transmission assembly to rotate forward and backward, so as to drive the roller 210 to rotate forward and backward; the flexible polish rod 400 is wound on the drum 210, so that the sucker rod is driven to reciprocate up and down to suck crude oil and the like.

In this embodiment, a complicated transmission link is removed, the speed reducer and the drum 210 can be integrated, only the belt is reserved for transmission, and noise can be reduced significantly.

In other embodiments, the driving mechanism includes a motor 220, the motor 220 is mounted on the top seat, and the motor 220 is in transmission connection with the drum 210.

With continued reference to fig. 2, the counterweight device 300 further includes a pulley bracket 330 and a weight box 340; the movable pulley 310 is pivoted to the pulley bracket 330, and the pulley bracket 330 is fixedly connected with the weight box 340.

An adjusting seat 350 is further disposed between the pulley bracket 330 and the weight box 340, and the pulley bracket 330 is fixedly connected to the weight box 340 through the adjusting seat 350.

The mode that the flexible polish rod 400 is wound on the roller 210 and the weight box 340 connected with the movable pulley 310 is combined is utilized, good balance can be achieved, meanwhile, the ultra-long stroke is achieved, when the stroke is 18 meters, the stroke of the weight box 340 is 9 meters, and the overall height of the oil pumping unit is reduced.

In the working process, when the motor 220 drives the roller 210 to rotate clockwise (when the motor is seen from the output shaft end of the motor), the roller 210 releases the pulley rope 320, and the pulley rope 320 enables the weight box 340 to slowly move downwards through the movable pulley 310; meanwhile, the roller 210 starts to wind the flexible polished rod 400, so as to drive the underground sucker rod to move upwards; when the motor 220 rotates counterclockwise, the roller 210 releases the flexible polish rod 400, so that the flexible polish rod 400 drives the sucker rod to move downwards; at the same time, the roller 210 starts to wind the pulley rope 320, so that the pulley rope 320 drives the weight box 340 to go upwards.

Further, a guide rail 500 is provided in the vertical truss 120 in the height direction, and the weight box 340 is slidably connected to the guide rail 500.

Specifically, guide rail 500 is equipped with two sets ofly, and the symmetry sets up to make weight box 340 sliding connection between two sets of guide rails 500, so set up, can further reach good balanced effect, simultaneously, guide rail 500 is located vertical truss 120, has still improved the security of operation, use.

With reference to fig. 1 and 2, the ultra-long stroke pumping unit further comprises a centralizer 600; the centralizer 600 includes a centralizing wheel 610 for guiding the flexible polished rod 400, the centralizing wheel 610 rotates relative to the opposite truss 120; both the centralizing wheel 610 and the movable pulley 310 are at a lower height than the drum 210, and the drum 210 is located between the centralizing wheel 610 and the movable pulley 310.

Specifically, as shown in fig. 2, the righting wheel 610 is located on the left side of the drum 210, and the movable pulley 310 is located on the right side of the drum 210.

When the motor 220 drives the roller 210 to rotate clockwise, the roller 210 starts to wind the flexible polished rod 400, and the flexible polished rod 400 is slowly lifted up after being straightened by the righting wheel 610, so that the downhole sucker rod is driven to go upwards.

Specifically, as shown in fig. 2, the righting device 600 further includes a first link 620 and a second link 630; one end of the first connecting rod 620 is hinged to one side of the vertical truss 120 through a first hinge shaft and can rotate relative to the first hinge shaft, and the other end of the first connecting rod 620 is hinged to the center of the righting wheel 610 through a second hinge shaft; one end of the second connecting rod 630 is hinged to one side of the vertical truss 120 through a third hinge shaft, and the other end is hinged to the first connecting rod 620 through a fourth hinge shaft; the first link 620, the second link 630, and the vertical girder 120 form a triangular structure.

In this embodiment, as shown in fig. 2, the third hinge shaft is located above the first hinge shaft, and the second link 630 can provide an upward lifting force to the first link 620, so that the first link 620 is in a horizontal state.

Briefly, the centralizing wheel 610, when in use, is in the state shown in fig. 2; when the righting wheel 610 is not needed, the fourth hinge shaft can be unscrewed to separate the second link 630 from the righting wheel 610, and at this time, the righting wheel 610 is rotated counterclockwise as shown in fig. 2 to be received at one side (not shown in the drawing) of the vertical truss 120, and at this time, the first link 620 is in a vertical state.

In other embodiments, the third hinge shaft may be located below the first hinge shaft, and the second link 630 may provide an upward supporting force to the first link 620.

In this embodiment, the flexible polish rod 400 is made of a polymer composite material by pressing; the pulley rope 320 is a steel wire rope, a belt or a composite material lifting rope. The composite material lifting rope can be a high-molecular composite material lifting rope, and the lifting rope is high in tensile strength, small in surface roughness, wear-resistant and corrosion-resistant.

Referring to fig. 1 or 2, the ultra-long stroke pumping unit further includes a cage ladder 700 disposed at one side of the frame 100, and the cage ladder 700 is extended along a height direction of the frame 100.

In the ultra-long stroke oil pumping unit of the embodiment, the ascending or descending distance of the flexible polished rod 400 in the whole process is far longer than that of a common polished rod, the longest distance can reach about 18 meters, and ultra-long stroke oil pumping is realized; by increasing the stroke length, the stroke loss can be effectively reduced, and the purpose of improving the pump efficiency is achieved.

The working principle of the ultra-long stroke pumping unit of the embodiment is as follows:

the motor 220 drives the roller 210 to rotate clockwise, the roller 210 releases the pulley rope 320, and the pulley rope 320 enables the weight box 340 to slowly move downwards through the movable pulley 310; meanwhile, the roller 210 starts to wind the flexible polished rod 400, and the flexible polished rod 400 is slowly lifted up after being straightened by the righting wheel 610, so that the underground sucker rod is driven to go upwards;

the motor 220 drives the roller 210 to rotate anticlockwise, and the roller 210 releases the flexible polished rod 400, so that the flexible polished rod 400 drives the sucker rod to move downwards; at the same time, the roller 210 starts to wind the pulley rope 320, so that the pulley rope 320 drives the weight box 340 to go upwards.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. An ultra-long stroke pumping unit, comprising: the device comprises a frame (100), a rotating device (200), a counterweight device (300) and a flexible polished rod (400);

the rotary device (200) comprises a roller (210) and a driving mechanism which are in transmission connection, the roller (210) is pivoted to the rack (100), and the driving mechanism is used for driving the roller (210) to rotate relative to the rack (100);

the counterweight device (300) comprises a movable pulley (310) and a pulley rope (320) connected to the movable pulley (310), one end of the pulley rope (320) is fixed relative to the frame (100), and the other end of the pulley rope is fixedly connected to the roller (210);

one end of the flexible polished rod (400) is fixed on the roller (210), and the other end of the flexible polished rod is connected with the sucker rod to drive the sucker rod to reciprocate up and down.

2. The ultra-long stroke pumping unit according to claim 1, wherein the frame (100) comprises a base (110), a vertical truss (120) and a top seat which are connected from bottom to top;

the roller (210) is located at the top seat.

3. The machine of claim 2, wherein the top mount comprises a top platform (131) and a fence (132) surrounding the side of the top platform (131);

the roller (210) is pivoted to a roller frame, and the roller frame is fixedly connected to the top end platform (131).

4. The ultra-long stroke pumping unit as claimed in claim 2, wherein the driving mechanism comprises a motor (220), the motor (220) is mounted on the top seat, and the motor (220) is in transmission connection with the drum (210);

or, actuating mechanism includes motor (220) and drive assembly, motor (220) pass through drive assembly with cylinder (210) transmission is connected, drive assembly adopts belt subassembly, chain subassembly, reduction gear or shaft coupling.

5. The ultra-long stroke pumping unit of claim 2, wherein the counterweight device (300) further comprises a pulley bracket (330) and a counterweight box (340);

the movable pulley (310) is pivoted to the pulley bracket (330), and the pulley bracket (330) is fixedly connected with the weight box (340).

6. The ultra-long stroke pumping unit as claimed in claim 5, wherein a guide rail (500) is provided in the vertical truss (120) along the height direction, and the weight box (340) is slidably connected to the guide rail (500).

7. An ultra-long stroke pumping unit according to any of claims 2-6, further comprising a centralizer (600);

the centralizing device (600) comprises a centralizing wheel (610) used for guiding the flexible polished rod (400), and the centralizing wheel (610) rotates relative to the vertical truss (120);

the heights of the centralizing wheel (610) and the movable pulley (310) are lower than the height of the roller (210), and the roller (210) is positioned between the centralizing wheel (610) and the movable pulley (310).

8. The ultra-long stroke pumping unit of claim 7, wherein the centralizer (600) further comprises a first linkage (620) and a second linkage (630);

one end of the first connecting rod (620) is hinged to one side of the vertical truss (120) through a first hinge shaft and can rotate relative to the first hinge shaft, and the other end of the first connecting rod (620) is hinged to the central part of the righting wheel (610) through a second hinge shaft;

one end of the second connecting rod (630) is hinged to one side of the vertical truss (120) through a third hinge shaft, and the other end of the second connecting rod is hinged to the first connecting rod (620) through a fourth hinge shaft;

the first connecting rod (620), the second connecting rod (630) and the vertical truss (120) form a triangular structure.

9. The ultra-long stroke pumping unit according to any of claims 1-6, wherein the flexible polish rod (400) is made of a polymer composite material by pressing;

the pulley rope (320) is a steel wire rope, a belt or a composite material lifting rope.

10. The ultra-long stroke pumping unit according to any one of claims 1 to 6, further comprising a cage ladder (700) disposed at one side of the frame (100), wherein the cage ladder (700) is disposed to extend in a height direction of the frame (100).

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