Oil pumping equipment

Abstract

The utility model provides oil pumping equipment. The oil pumping equipment comprises a base, a roller, a flexible connecting piece and a driving assembly. The roller is rotatably arranged on the base; one end of the flexible connecting piece is wound on the roller, and the other end of the flexible connecting piece hangs down and is used for extending into a pumping wellhead to be connected with a plunger of an oil well pump; the driving assembly comprises a driving motor and a plurality of stages of middle transmission pairs; the middle transmission pair is a belt transmission pair and / or a chain transmission pair; and the multiple stages of middle transmission pairs are in end-to-end transmission connection, are arranged between the driving motor and the roller and are used for driving the roller to rotate. The device is simple and ingenious in structure, small in vibration, low in noise, low in maintenance cost, convenient to popularize and wide in adaptation.

Description

Technical Field

[0001] The utility model relates to the technical field of oil extraction equipment, in particular to a pumping equipment. Background Art

[0002] At present, the oil extraction of oil reservoirs in oil fields still mainly adopts the oil extraction method of beam pumping units with rod pumps, accounting for more than 80% of the total number of oil wells. With the continuous oil extraction of oil reservoirs, the well conditions become complex and diverse, the extraction difficulty increases, and a variety of oil well extraction processes are formed. In traditional oil extraction equipment, the stroke of the beam pumping unit is short and the impact is high. In low-permeability wells and heavy oil wells, the stroke loss rate is large, the pump efficiency is low, the rod, pipe and pump are severely worn, the pump inspection is frequent, and the maintenance and operation cost is high. For most beamless pumping units, the stroke is increased to 8 meters, and the pump efficiency is improved to a certain extent. However, the impact load is large during commutation, the system life is low, and due to the limitation of the tower height, it is difficult to meet the need for developing longer strokes, and the maintenance and operation are difficult.

[0003] In recent years, ultra-long stroke pumping units have been applied to achieve ultra-long stroke oil extraction. However, there are problems such as the need to regularly maintain and replace the engine oil and generate waste liquid due to the application of a speed reducer, and the gear transmission noise is large; during well repair, the displacement machine needs to be moved, and the operation is complex and the maintenance cost is high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pumping equipment to solve at least one of the above technical problems existing in the prior art.

[0005] To solve the above technical problems, a pumping equipment provided by the utility model includes: a base, a drum, a flexible connecting piece and a driving component;

[0006] The drum is rotatably arranged on the base;

[0007] One end of the flexible connecting piece is wound around the drum, and the other end hangs down for extending into the pumping wellhead to be connected with the plunger of the oil pump;

[0008] The driving component includes a driving motor and several levels of intermediate transmission pairs;

[0009] The intermediate transmission pair is a belt transmission pair and / or a chain transmission pair;

[0010] Several levels of the intermediate transmission pairs are connected in series and arranged between the driving motor and the drum for driving the drum to rotate.

[0011] Furthermore, one or several intermediate shafts arranged at intervals are rotatably arranged on the base;

[0012] In the transmission direction from the drive motor to the drum, an intermediate transmission pair is provided between the drive motor and the adjacent intermediate shaft, between the drum and the adjacent intermediate shaft, and / or between two adjacent intermediate shafts.

[0013] Wherein, the intermediate shaft is axially parallel to the motor power output shaft and the drum.

[0014] Preferably, the belt transmission pair is a synchronous belt transmission pair.

[0015] Further, the intermediate shaft includes a first intermediate shaft;

[0016] The intermediate transmission pair includes a primary transmission pair provided between the first intermediate shaft and the drum;

[0017] The primary transmission pair includes a first driving wheel and a first driven wheel;

[0018] The first driving wheel is fixedly sleeved on the first intermediate shaft;

[0019] The first driven wheel is fixedly connected coaxially with the drum;

[0020] Both the first driving wheel and the first driven wheel are belt wheels, and are connected by a first belt between the first driving wheel and the first driven wheel; or, both the first driving wheel and the first driven wheel are sprockets, and are connected by a first chain between the first driving wheel and the first driven wheel.

[0021] Further, two sets of the primary transmission pairs are arranged symmetrically on both sides of the drum and at both ends of the first intermediate shaft.

[0022] That is, two of the first driven wheels are symmetrically arranged on both sides of the drum;

[0023] Two of the first driving wheels are symmetrically arranged at both ends of the first intermediate shaft.

[0024] Further, one or several stages of the intermediate transmission pairs are provided between the first intermediate shaft and the drive motor.

[0025] Further, an intermediate wheel is fixedly sleeved on the first intermediate shaft;

[0026] A driving wheel is fixedly sleeved on the power output shaft of the drive motor;

[0027] Both the intermediate wheel and the driving wheel are belt wheels, and are connected by a belt between the intermediate wheel and the driving wheel; or, both the intermediate wheel and the driving wheel are sprockets, and are connected by a chain between the intermediate wheel and the driving wheel.

[0028] Preferably, one or several secondary intermediate shafts are rotatably arranged between the first intermediate shaft and the driving motor on the base at intervals;

[0029] An intermediate transmission pair is arranged between the secondary intermediate shaft and the driving motor, between the secondary intermediate shaft and the first intermediate shaft, and / or between two adjacent secondary intermediate shafts. The arrangement form of this intermediate transmission pair can refer to the form of the primary transmission pair or other belt or chain transmission pairs, which will not be elaborated here.

[0030] Further, the base is a moving seat;

[0031] It further includes a base and a synchronization component;

[0032] The moving seat is arranged on the base so as to be movable along the axial direction of the roller;

[0033] The synchronization component includes a screw transmission pair and an intermediate transmission mechanism;

[0034] The screw transmission pair includes a screw rod and a transmission wheel;

[0035] The screw rod is fixedly arranged on the base;

[0036] The axial direction of the screw rod is parallel to the axial direction of the roller;

[0037] The transmission wheel is sleeved on the screw rod, and an internal thread hole adapted to the external thread of the screw rod is arranged at the center of the transmission wheel; moreover, the transmission wheel is rotatably arranged in the circumferential direction and relatively fixed in the axial direction on the moving seat;

[0038] Both ends of the intermediate transmission mechanism are respectively connected to the roller and the transmission wheel, and are used for the transmission between the roller and the transmission wheel. When the roller rotates, the transmission wheel is driven to rotate through the intermediate transmission mechanism, and then the roller is driven to move synchronously along the axial direction of the roller through the cooperation of the screw transmission pair.

[0039] Among them, the intermediate transmission mechanism is arranged on the moving seat and is used to realize that the rotation of the roller drives the transmission wheel to rotate synchronously.

[0040] Further, the intermediate transmission mechanism is directly connected to the roller or indirectly connected to the roller through the intermediate shaft.

[0041] Further, the intermediate transmission mechanism is a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.

[0042] Further, the belt transmission mechanism includes a driving belt wheel, a driven belt wheel and a belt;

[0043] The driving pulley is fixedly connected to the roller coaxially, or the driving pulley is fixedly sleeved on the intermediate shaft;

[0044] The driven pulley is fixedly connected to the transmission wheel coaxially; or, a belt clamping groove is arranged on the outer circumference of the transmission wheel, thereby forming the driven pulley.

[0045] Preferably, the belt transmission mechanism is a synchronous belt transmission mechanism.

[0046] Preferably, a plurality of driving pulleys with different diameter specifications are alternatively and detachably arranged on one side of the roller or the intermediate shaft; or, a plurality of driving pulleys with different diameter specifications are arranged side by side on one side of the roller or the intermediate shaft, and the belt can be selectively connected to one of the driving pulleys;

[0047] Or, a plurality of driven pulleys with different diameter specifications are alternatively and detachably arranged on one side of the transmission wheel; or, a plurality of driven pulleys with different diameter specifications are arranged side by side on one side of the transmission wheel, and the belt can be selectively connected to one of the driven pulleys.

[0048] As the working time extends, the flexible connecting piece is usually continuously stretched and elongated. At this time, it is often impossible to achieve the synchronization and complete mutual cancellation of the lateral movement of the roller and the lateral movement of the flexible connecting piece relative to the roller, that is, it is impossible to achieve the precise centering of the flexible connecting piece at all times. In this application, by replacing the driving pulleys or driven pulleys of different specifications, the transmission ratio of the belt transmission mechanism is adjusted, so as to achieve the mutual cancellation of the lateral movement of the roller and the lateral movement of the flexible connecting piece, and finally achieve the centering of the flexible connecting piece at all times. Compared with other synchronous displacement mechanisms, the mechanism of this application is simpler, the adjustment structure is more flexible, and it is convenient for popularization and adaptation. The adjustment principles of the following chain transmission mechanism or gear transmission mechanism are basically the same.

[0049] Further, the chain transmission mechanism includes a driving sprocket, a driven sprocket and a chain;

[0050] The driving sprocket is fixedly connected to the roller coaxially, or the driving sprocket is fixedly sleeved on the intermediate shaft;

[0051] The driven sprocket is fixedly connected to the transmission wheel coaxially; or, a chain engaging tooth is arranged on the outer circumference of the transmission wheel, thereby forming the driven sprocket.

[0052] Preferably, a plurality of driving sprockets with different diameter specifications are alternatively and detachably arranged on one side of the roller or the intermediate shaft; or, a plurality of driving sprockets with different diameter specifications are arranged side by side on one side of the roller or the intermediate shaft, and the chain can be selectively connected to one of the driving sprockets;

[0053] Alternatively, several driven sprockets with different diameter specifications can be alternatively and detachably arranged on one side of the driving wheel; or, several driven sprockets with different diameter specifications are arranged side by side on one side of the driving wheel, and the chain can be selectively connected to one of the driven sprockets.

[0054] Furthermore, the gear transmission mechanism includes a driving gear and a driven gear;

[0055] The driving gear is coaxially and fixedly connected to the roller, or the driving gear is fixedly sleeved on the intermediate shaft;

[0056] The driven gear is coaxially and fixedly connected to the driving wheel; or, a tooth structure is provided on the outer circumference of the driving wheel to form the driven gear;

[0057] The driving gear and the driven gear are directly meshed, or the driving gear is drivingly connected to the driven gear through one or several intermediate gears.

[0058] Preferably, the driving gear and the driven gear are bevel gears; it further includes an intermediate transmission shaft, the intermediate transmission shaft is rotatably arranged on the moving seat, and bevel gears meshing with the driving gear and the driven gear respectively are arranged at both ends of the intermediate transmission shaft.

[0059] Furthermore, a first bearing and a second bearing are arranged between the driving wheel and the moving seat; the first bearing is used for transmitting the radial force of the driving wheel between the driving wheel and the moving seat; the second bearing is used for transmitting the axial force of the driving wheel between the driving wheel and the moving seat.

[0060] Preferably, a pressure wheel for increasing the belt tension is arranged on the moving seat.

[0061] Furthermore, the flexible connecting member is a flexible optical rod or a steel wire rope.

[0062] Preferably, a track is arranged on the base, and the moving seat is arranged on the track through rolling elements.

[0063] Adopting the above technical solutions, the present utility model has the following beneficial effects:

[0064] A pumping equipment provided by the present utility model has a simple and ingenious structure, small vibration, low noise, low maintenance cost, and is convenient for popularization and wide adaptation.

[0065] Moreover, it can realize the overall lateral movement of the roller and its driving member along with the rotation of the roller, the mechanism is simpler, and the adjustment structure is more flexible. Description of the Drawings

[0066] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0067] Figure 1 The front view of the oil pumping equipment provided by the embodiment of the present invention;

[0068] Figure 2 is Figure 1 the top view of the oil pumping equipment shown;

[0069] Figure 3 is Figure 1 the schematic diagram of the transmission structure between the two-stage intermediate transmission pairs 30 shown;

[0070] Figure 4 The schematic diagram of the transmission structure between the three-stage intermediate transmission pairs 30 in the embodiment;

[0071] Figure 5 is Figure 1 the left view of the oil pumping equipment shown;

[0072] Figure 6 The schematic diagram of the structure between the drum and the synchronization component in Embodiment 2;

[0073] Figure 7 The working principle diagram of the synchronization component in Embodiment 2;

[0074] Figure 8 is Figure 7 the partial enlarged view at A in;

[0075] Reference numerals:

[0076] 10 - base; 11 - track; 15 - pedestal; 16 - rolling element; 17 - mounting seat; 20 - drum; 21 - flexible connecting member; 22 - driving motor; 30 - intermediate transmission pair; 30a - first-stage transmission pair; 31 - intermediate shaft; 31a - first intermediate shaft; 31b - secondary intermediate shaft; 32 - first driving wheel; 33 - first belt; 34 - first driven wheel; 35 - intermediate wheel; 36 - driving wheel; 40 - synchronization component; 41 - screw; 42 - transmission wheel; 43 - driving pulley; 45 - driven pulley; 50 - pressing wheel; 51 - swinging bracket; 52 - adjusting bolt. Specific embodiments

[0077] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the protection scope of the present utility model.

[0078] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0079] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0080] The following further explains and illustrates the present utility model in conjunction with specific embodiments.

[0081] Embodiment 1

[0082] As Figures 1-5 shown, a pumping equipment provided in this embodiment includes: a base 15, a drum 20, a flexible connecting member 21, and a driving assembly.

[0083] The drum 20 is rotatably arranged on the base 15; one end of the flexible connecting member 21 is wound around the drum 20, and the other end hangs down for extending into the pumping wellhead to be connected to the plunger of the oil pump; the driving assembly includes a driving motor 22 and several levels of the intermediate transmission pairs 30; the intermediate transmission pairs 30 are belt transmission pairs and / or chain transmission pairs; several levels of the intermediate transmission pairs 30 are connected in series in a head-to-tail manner and are arranged between the driving motor 22 and the drum 20 for driving the drum 20 to rotate.

[0084] In this embodiment, one or more intermediate shafts 31 arranged at intervals are relatively rotatably provided on the base 15; in the transmission direction from the driving motor 22 to the drum 20, the intermediate transmission pair 30 is provided between the driving motor 22 and the adjacent intermediate shaft 31, between the drum 20 and the adjacent intermediate shaft 31, and or between two adjacent intermediate shafts 31.

[0085] The intermediate shaft 31 is axially parallel to the motor power output shaft and the drum 20. Preferably, the belt drive pair is a synchronous belt drive pair.

[0086] For the sake of simplicity, the present application refers to the intermediate shaft 31 adjacent to the drum 20 as a first intermediate shaft 31 a.

[0087] Figure 1 , Figure 2 and Figure 3 The disclosed oil pumping equipment includes two intermediate transmission pairs 30 connected end to end. The intermediate transmission pair 30 includes a primary transmission pair 30a disposed between the first intermediate shaft 31a and the drum 20. The primary transmission pair 30a includes a first driving wheel 32 and a first driven wheel 34.

[0088] The first driving wheel 32 is fixedly sleeved on the first intermediate shaft 31a; the first driven wheel 34 is coaxially fixedly connected to the drum 20;

[0089] When both the first driving wheel 32 and the first driven wheel 34 are pulleys, the first driving wheel 32 and the first driven wheel 34 are connected via a first belt 33; or, when both the first driving wheel 32 and the first driven wheel 34 are sprockets, the first driving wheel 32 and the first driven wheel 34 are connected via a first chain (see the mark at the first belt).

[0090] Further preferably, the two sets of the primary transmission pairs 30a are symmetrically arranged on both sides of the drum 20 and both ends of the first intermediate shaft 31a. That is, the two first driven wheels 34 are symmetrically arranged on both sides of the drum 20; the two first driving wheels 32 are symmetrically arranged on both ends of the first intermediate shaft 31a.

[0091] Among them, one or more intermediate transmission pairs 30 are arranged between the first intermediate shaft 31a and the drive motor 22. Figure 3 As shown, when the oil pumping equipment includes two intermediate transmission pairs 30, a primary intermediate transmission pair 30 is provided between the first intermediate shaft 31a and the drive motor 22; Figure 4 As shown, when the oil pumping equipment includes a plurality of intermediate transmission pairs 30 , more than two intermediate transmission pairs 30 adjacent to each other end to end are arranged between the first intermediate shaft 31 a and the drive motor 22 .

[0092] Among them, an intermediate wheel 35 is fixedly sleeved on the first intermediate shaft 31a; see Figure 3 As shown, when the oil pumping equipment includes two intermediate transmission pairs 30, a driving wheel 36 is fixedly sleeved on the power output shaft of the driving motor 22. When both the intermediate wheel 35 and the driving wheel 36 are belt wheels, they are connected by a belt; or, when both the intermediate wheel 35 and the driving wheel 36 are sprocket wheels, they are connected by a chain.

[0093] See Figure 4 As shown, when the oil pumping equipment includes three or more levels of intermediate transmission pairs 30, one or several secondary intermediate shafts 31b are rotatably arranged between the first intermediate shaft 31a and the driving motor 22 on the base 15 at intervals; intermediate transmission pairs 30 are arranged between the secondary intermediate shaft 31b and the driving motor 22, between the secondary intermediate shaft 31b and the first intermediate shaft 31a, and between two adjacent secondary intermediate shafts 31b. The setting form of this intermediate transmission pair 30 can refer to the form of the first-level transmission pair 30a or other belt or chain transmission pairs, which will not be elaborated here.

[0094] An oil pumping equipment provided by the present utility model has a simple and ingenious structure, small vibration, low noise, low maintenance cost, and is convenient for popularization and wide adaptation.

[0095] Embodiment 2

[0096] See Figure 1 、 Figure 2 and Figure 6 As shown, in an oil pumping equipment provided in this embodiment, the base 15 is a movable seat; this embodiment further includes a base 10 and a synchronization assembly 40.

[0097] The movable seat is movably arranged on the base 10 along the axial direction of the roller 20; the synchronization assembly 40 includes a screw transmission pair and an intermediate transmission mechanism; the screw transmission pair includes a screw 41 and a transmission wheel 42; the screw 41 is fixedly arranged on the base 10; the axial direction of the screw 41 is parallel to the axial direction of the roller 20; the transmission wheel 42 is sleeved on the screw 41, and an internal thread hole adapted to the external thread of the screw 41 is arranged at the center of the transmission wheel 42; and, the transmission wheel 42 is rotatably arranged in the circumferential direction and relatively fixed in the axial direction on the base 15 (i.e., the movable seat).

[0098] Both ends of the intermediate transmission mechanism are respectively connected to the roller 20 and the transmission wheel 42, and are used for the transmission between the roller 20 and the transmission wheel 42. When the roller 20 rotates, the transmission wheel 42 is driven to rotate through the intermediate transmission mechanism, and then the roller 20 is driven to move synchronously along the axial direction of the roller 20 through the cooperation of the screw transmission pair. In this embodiment, the intermediate transmission mechanism is arranged on the moving seat and is used to realize the synchronous rotation of the roller 20 driving the transmission wheel 42 to rotate.

[0099] There are many implementation manners of the intermediate transmission mechanism. For example, the intermediate transmission mechanism is directly connected to the roller 20; another implementation manner is that the intermediate transmission mechanism is indirectly connected to the roller 20 through the intermediate shaft 31. The intermediate transmission mechanism can be a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.

[0100] The following takes the belt transmission mechanism as an example for elaboration.

[0101] See Figure 6 As shown, the belt transmission mechanism includes a driving pulley 43, a driven pulley 45 and a belt; the driving pulley 43 is coaxially and fixedly connected to the roller 20, and a belt clamping groove is arranged on the outer circle of the transmission wheel 42, thereby forming the driven pulley 45. That is Figure 6 the shown transmission wheel 42 serves as the driven pulley 45 at the same time.

[0102] Alternatively, the driven pulley 45 can be independently arranged, and the driven pulley 45 is coaxially and fixedly connected to the transmission wheel 42.

[0103] In addition, another implementation manner is that the driving pulley 43 can be fixedly sleeved on one of the intermediate shafts 31; preferably sleeved on the first intermediate shaft 31a and is in transmission connection with the roller 20 through the intermediate transmission pair 30.

[0104] Preferably, the belt transmission mechanism is a synchronous belt transmission mechanism.

[0105] Preferably, a plurality of driving pulleys 43 with different diameter specifications can be alternatively and detachably arranged on one side of the roller 20 or on the intermediate shaft 31; or, a plurality of driving pulleys 43 with different diameter specifications are arranged side by side on one side of the roller 20 or on the intermediate shaft 31, and the belt can be selectively connected to one of the driving pulleys 43;

[0106] Or, a plurality of driven pulleys 45 with different diameter specifications can be alternatively and detachably arranged on one side of the transmission wheel 42; or, a plurality of driven pulleys 45 with different diameter specifications are arranged side by side on one side of the transmission wheel 42, and the belt can be selectively connected to one of the driven pulleys 45.

[0107] As the working time increases, the side length of the flexible connector 21 is usually continuously stretched. At this time, it is often impossible to achieve synchronization and complete mutual offset between the lateral movement of the roller 20 and the lateral movement of the flexible connector 21 relative to the roller 20, that is, it is impossible to achieve accurate centering of the flexible connector 21. The present application adjusts the transmission ratio of the belt transmission mechanism by replacing the driving pulley 43 or the driven pulley 45 of different specifications, so as to achieve mutual offset between the lateral movement of the roller 20 and the lateral movement of the flexible connector 21, and finally achieve the flexible connector 21 always being centered. Compared with other synchronous displacement mechanisms, the present application mechanism is simpler, the adjustment structure is more flexible, and it is easy to promote and adapt widely.

[0108] Furthermore, a first bearing and a second bearing are provided between the transmission wheel 42 and the moving seat; the first bearing is used for transmitting radial force of the transmission wheel 42 between the transmission wheel 42 and the moving seat; the second bearing is used for transmitting axial force of the transmission wheel 42 between the transmission wheel 42 and the moving seat.

[0109] Preferably, see Figure 7 and Figure 8 As shown, a pressure wheel 50 for increasing the tension of the belt in the belt transmission mechanism is provided on the movable seat. The pressure wheel 50 is provided on the movable seat through a swing bracket 51, and an adjusting bolt 52 is provided on the side of the swing bracket 51 away from the pressure wheel 50. The adjusting bolt 52 is screwed into the threaded hole of the movable seat, and the top of the adjusting bolt 52 abuts against the back of the swing bracket 51. By adjusting the screwing length of the adjusting bolt 52, the pressure of the pressure wheel 50 on the belt is adjusted, and the tension of the belt in the belt transmission mechanism is adjusted. Further preferably, two sets of pressure wheels 50, swing brackets 51 and adjusting bolts 52 can be provided, which are respectively arranged on both sides of the center line connecting the driving pulley 43 and the driven pulley 45.

[0110] Furthermore, the flexible connection member 21 can be a flexible bare rod or a steel wire rope.

[0111] Preferably, a track 11 is provided on the base 10, and the movable seat, namely the base 15, is provided on the track 11 through a rolling member 16. The transmission wheel 42 is fixed on the base 15 through a mounting seat 17.

[0112] The utility model can realize the lateral movement of the drum 20 and the driving member thereof as a whole along with the rotation of the drum 20, the mechanism is simpler and the adjustment structure is more flexible.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil pumping equipment, characterized in that: include: Base, roller, flexible connection and drive assembly; The drum is rotatably arranged on the base; One end of the flexible connector is wound around the drum, and the other end is suspended to extend into the wellhead to connect with the plunger of the oil pump; The driving assembly includes a driving motor and several stages of intermediate transmission pairs; The intermediate transmission pair is a belt transmission pair and / or a chain transmission pair; The intermediate transmission pairs of several levels are connected head to tail in transmission and are arranged between the driving motor and the drum to drive the drum to rotate.

2. The oil pumping equipment according to claim 1, characterized in that: One or more intermediate shafts arranged at intervals are relatively rotatably arranged on the base; In the transmission direction from the driving motor to the roller, the intermediate transmission pair is arranged between the driving motor and the adjacent intermediate shaft, between the roller and the adjacent intermediate shaft, or between two adjacent intermediate shafts.

3. The oil pumping equipment according to claim 1, characterized in that: The belt transmission pair is a synchronous belt transmission pair.

4. The oil pumping equipment according to claim 2, characterized in that: The intermediate shaft includes a first intermediate shaft; The intermediate transmission pair includes a primary transmission pair arranged between the first intermediate shaft and the drum; The primary transmission pair comprises a first driving wheel and a first driven wheel; The first driving wheel is fixedly sleeved on the first intermediate shaft; The first driven wheel is coaxially and fixedly connected to the drum; The first driving wheel and the first driven wheel are both pulleys, and the first driving wheel and the first driven wheel are connected by a first belt; or, the first driving wheel and the first driven wheel are both sprockets, and the first driving wheel and the first driven wheel are connected by a first chain.

5. The oil pumping equipment according to claim 4, characterized in that: The two sets of the first-stage transmission pairs are symmetrically arranged on both sides of the drum and at both ends of the first intermediate shaft; The two first driven wheels are symmetrically arranged on both sides of the drum; The two first driving wheels are symmetrically arranged at two ends of the first intermediate shaft.

6. The oil pumping equipment according to claim 4, characterized in that: One or more stages of intermediate transmission pairs are arranged between the first intermediate shaft and the drive motor.

7. The oil pumping equipment according to claim 4, characterized in that: An intermediate wheel is fixedly mounted on the first intermediate shaft; A driving wheel is fixedly mounted on the power output shaft of the driving motor; The intermediate wheel and the driving wheel are both pulleys, and the intermediate wheel and the driving wheel are connected by a belt; or, the intermediate wheel and the driving wheel are both sprockets, and the intermediate wheel and the driving wheel are connected by a chain.

8. The oil pumping equipment according to claim 4, characterized in that: The base is rotatably provided with one or a plurality of secondary intermediate shafts arranged at intervals between the first intermediate shaft and the driving motor; The intermediate transmission pair is arranged between the secondary intermediate shaft and the drive motor, between the secondary intermediate shaft and the first intermediate shaft, and / or between two adjacent secondary intermediate shafts.

9. The oil pumping equipment according to claim 2, characterized in that: The base is a mobile base; Also included are a base and synchronization assembly; The movable seat is arranged on the base so as to be movable along the axial direction of the drum; The synchronization assembly includes a threaded transmission pair and an intermediate transmission mechanism; The threaded transmission pair includes a screw and a transmission wheel; The screw is fixedly arranged on the base; The axial direction of the screw is parallel to the axial direction of the drum; The transmission wheel is sleeved on the screw rod, and an internal threaded hole matching the external thread of the screw rod is arranged at the center of the transmission wheel; and the transmission wheel is rotatably arranged on the moving seat in the circumferential direction and relatively fixed in the axial direction; The two ends of the intermediate transmission mechanism are respectively connected to the roller and the transmission wheel for transmission between the roller and the transmission wheel. When the roller rotates, the transmission wheel is driven to rotate through the intermediate transmission mechanism, and then the roller is driven to move synchronously along the axial direction of the roller through the cooperation of the threaded transmission pair.

10. The oil pumping equipment according to claim 9, characterized in that: The intermediate transmission mechanism is directly connected to the roller, or is indirectly connected to the roller via the intermediate shaft.

11. The oil pumping equipment according to claim 9, characterized in that: The intermediate transmission mechanism is a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.

12. The oil pumping equipment according to claim 11, characterized in that: The belt transmission mechanism comprises a driving pulley, a driven pulley and a belt; The driving pulley is coaxially fixedly connected to the drum, or the driving pulley is fixedly sleeved on the intermediate shaft; The driven pulley is coaxially fixedly connected to the transmission wheel; or, a tape groove is provided on the outer circle of the transmission wheel to form the driven pulley.

13. The oil pumping equipment according to claim 12, characterized in that: The belt transmission mechanism is a synchronous belt transmission mechanism.

14. The oil pumping equipment according to claim 12, characterized in that: A plurality of driving pulleys of different diameters can be selectively and detachably arranged on one side of the drum or on the intermediate shaft; or, a plurality of driving pulleys of different diameters can be arranged side by side on one side of the drum or on the intermediate shaft, and a belt can be selectively connected to one of the driving pulleys; Alternatively, several driven pulleys of different diameters may be selectively and detachably arranged on one side of the transmission wheel; or, several driven pulleys of different diameters may be arranged side by side on one side of the transmission wheel, and a belt may be selectively connected to one of the driven pulleys.

15. The oil pumping equipment according to claim 11, characterized in that: The chain transmission mechanism comprises a driving sprocket, a driven sprocket and a chain; The driving sprocket is coaxially fixedly connected to the drum, or the driving sprocket is fixedly sleeved on the intermediate shaft; The driven sprocket is coaxially fixedly connected to the transmission wheel; or, sprocket teeth are arranged on the outer circle of the transmission wheel to form the driven sprocket.

16. The oil pumping equipment according to claim 15, characterized in that: A plurality of driving sprockets of different diameters can be selectively and detachably arranged on one side of the drum or on the intermediate shaft; or, a plurality of driving sprockets of different diameters can be arranged side by side on one side of the drum or on the intermediate shaft, and a chain can be selectively connected to one of the driving sprockets; Alternatively, several driven sprockets of different diameters may be selectively and detachably arranged on one side of the transmission wheel; or, several driven sprockets of different diameters may be arranged side by side on one side of the transmission wheel, and the chain may be selectively connected to one of the driven sprockets.

17. The oil pumping equipment according to claim 11, characterized in that: The gear transmission mechanism comprises a driving gear and a driven gear; The driving gear is coaxially fixedly connected to the drum, or the driving gear is solidly sleeved on the intermediate shaft; The driven gear is coaxially fixedly connected to the transmission wheel; or, a tooth structure is provided on the outer circumference of the transmission wheel to form the driven gear; The driving gear and the driven gear are directly meshed, or the driving gear is drivingly connected to the driven gear via one or more intermediate gears.

18. The oil pumping equipment according to claim 17, characterized in that: The driving gear and the driven gear are bevel gears; an intermediate transmission shaft is also included, which is rotatably arranged on the moving seat, and both ends of the intermediate transmission shaft are provided with bevel gears respectively meshing with the driving gear and the driven gear.

19. The oil pumping equipment according to claim 9, characterized in that: A first bearing and a second bearing are arranged between the transmission wheel and the moving seat; the first bearing is used for transmitting the radial force of the transmission wheel between the transmission wheel and the moving seat; the second bearing is used for transmitting the axial force of the transmission wheel between the transmission wheel and the moving seat.

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