Oil pumping equipment

Abstract

The utility model provides oil pumping equipment. The oil pumping equipment comprises a base, a movable seat, an execution assembly and a synchronization assembly, the execution assembly comprises a roller, a flexible connecting piece and a driving piece, and the driving piece is used for driving the roller to rotate; 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 execution assembly is arranged on the moving seat; the movable seat is movably arranged on the base in the axial direction of the roller; the synchronous assembly comprises a thread transmission pair and a middle transmission mechanism; the transverse movement mechanism is simple and ingenious in structure, the roller and the driving piece of the roller can integrally move transversely along with rotation of the roller, and the transverse movement mechanism is more flexible in structure adjustment, convenient to popularize and wide in adaptation.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, and in particular to an oil pumping device. Background Technology

[0002] Currently, ultra-long stroke pumping equipment is increasingly used in oil extraction. This equipment typically includes a drum and its drive motor, with flexible connectors such as a smooth rod or wire rope wound around the drum. The free end of the flexible connector extends into the well to connect to the sucker rod, and then connects to the plunger (pump) of the bottom-hole pump via the sucker rod. Existing pumping equipment of this type has the following problems:

[0003] 1. It is inconvenient to center the wellhead when installing the pumping unit.

[0004] 2. It is inconvenient to adjust the deviation during application.

[0005] If the flexible polished rod is not centered at the wellhead, it will cause uneven wear on the sealing packing in the wellhead sealing device, affecting the sealing effect and the life of the packing.

[0006] Furthermore, during operation, the flexible connector moves axially relative to the drum, causing the free end to swing back and forth relative to the wellhead, which in turn prevents the oil pump from operating smoothly. Utility Model Content

[0007] The purpose of this utility model is to provide an oil pumping device to solve at least one of the above-mentioned technical problems existing in the prior art.

[0008] To solve the above-mentioned technical problems, this utility model provides an oil pumping device, comprising: a base, a movable base, an execution component, and a synchronization component;

[0009] The execution component includes a roller, a flexible connector, and a drive component, wherein the drive component is used to drive the roller to rotate.

[0010] One end of the flexible connector is wrapped around the roller, and the other end hangs down to extend into the wellhead and connect with the plunger of the oil pump.

[0011] The execution component is mounted on the movable base;

[0012] The movable seat is movably mounted on the base along the axial direction of the roller;

[0013] The synchronization component includes a threaded drive pair and an intermediate drive mechanism;

[0014] The threaded transmission pair includes a screw and a transmission wheel;

[0015] The screw is fixedly mounted on the base;

[0016] The axial direction of the screw is parallel to the axial direction of the drum;

[0017] The transmission wheel is mounted on the screw, and the center of the transmission wheel is provided with an internal thread hole that matches the external thread of the screw; and the transmission wheel and the movable seat are rotatably connected in the circumferential direction and relatively fixed in the axial direction.

[0018] The two ends of the intermediate transmission mechanism are respectively connected to the drum and the transmission wheel, and are used for transmission between the drum and the transmission wheel. When the drum rotates, the transmission wheel is driven to rotate through the intermediate transmission mechanism, and then the moving seat and the drum move synchronously along the drum axis through the cooperation of the threaded transmission pair.

[0019] The intermediate transmission mechanism is mounted on the movable seat and is used to synchronously drive the rotation of the transmission wheel as the drum rotates.

[0020] Furthermore, the intermediate transmission mechanism is a belt transmission mechanism, a chain transmission mechanism, or a gear transmission mechanism.

[0021] Furthermore, the belt drive mechanism includes a driving pulley, a driven pulley, and a belt;

[0022] The drive pulley is fixedly connected to the roller coaxially;

[0023] The driven pulley is coaxially and fixedly connected to the transmission wheel; or, the outer circumference of the transmission wheel is provided with a belt-locking groove, thereby forming the driven pulley.

[0024] Preferably, the belt drive mechanism is a synchronous belt drive mechanism.

[0025] Furthermore, the chain drive mechanism includes a driving sprocket, a driven sprocket, and a chain;

[0026] The drive sprocket is fixedly connected to the roller coaxially;

[0027] The driven sprocket is coaxially and fixedly connected to the transmission wheel; or, the outer circumference of the transmission wheel is provided with chain-fastening teeth, thereby forming the driven sprocket.

[0028] Furthermore, the gear transmission mechanism includes a driving gear and a driven gear;

[0029] The drive gear is fixedly connected to the roller coaxially;

[0030] The driven gear is coaxially and fixedly connected to the transmission wheel; or, the outer circle of the transmission wheel is provided with a tooth structure, thereby forming the driven gear.

[0031] The driving gear and the driven gear mesh directly, or the driving gear is connected to the driven gear through one or more intermediate gears.

[0032] Preferably, the driving gear and the driven gear are bevel gears; it also includes an intermediate drive shaft, which is rotatably mounted on the movable seat, and bevel gears are provided at both ends of the intermediate drive shaft to mesh with the driving gear and the driven gear respectively.

[0033] Furthermore, a thrust bearing is provided between the transmission wheel and the movable seat. The thrust bearing includes a middle ring, two seat rings, and multiple rollers. The middle ring is fixedly connected to the transmission wheel, and the seat rings are fixedly connected to the movable seat, thereby realizing a circumferentially rotatable and axially fixed connection between the transmission wheel and the movable seat.

[0034] Furthermore, the movable base is provided with mounting holes;

[0035] It also includes a bushing portion that is coaxially and fixedly connected to the transmission wheel, and the transmission wheel is inserted into the mounting hole through the bushing portion.

[0036] Preferably, the bushing portion is integrally formed with the transmission wheel. Alternatively, the bushing portion and the transmission wheel are formed separately and fixedly connected by fasteners such as bolts.

[0037] Preferably, the thrust bearing is disposed between the bushing portion and the mounting hole. A limiting ring is provided on the bushing portion. After the middle ring is fitted onto the bushing portion with one end face abutting against the limiting ring, it can be locked or at least axially limited using components such as a snap ring, pin, or pressure cap. Preferably, a pressure cap structure is used. The pressure cap is fixedly connected to the bushing portion by bolts or screws. The end face of the pressure cap abuts against the other end face of the middle ring, fixing the middle ring while also transmitting force when the drive wheel synchronously drives the moving seat and roller to reciprocate axially.

[0038] Preferably, the movable seat is provided with a pressure roller for increasing the tension of the belt.

[0039] Furthermore, the flexible connector is a flexible rod or a steel wire rope. The steel wire rope is preferably a coated and / or filled steel wire rope; such as a solid polymer coated steel wire rope or a solid polymer filled steel wire rope.

[0040] Preferably, the base is provided with a track, and the movable seat is mounted on the track by a rolling element.

[0041] By adopting the above technical solution, this utility model has the following beneficial effects:

[0042] The oil pumping device provided by this utility model has a simple and ingenious structure, which can realize the lateral movement of the drum and its driving components as a whole with the rotation of the drum. The mechanism of this application is simpler, the adjustment structure is more flexible, and it is easy to promote and adapt to a wide range of applications. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 A front view of the oil pumping equipment provided in an embodiment of this utility model;

[0045] Figure 2 for Figure 1 The diagram shown illustrates the working principle of the synchronization component.

[0046] Figure 3 for Figure 1 Top view of the oil pumping equipment shown;

[0047] Figure 4 for Figure 2 Enlarged view of a portion of point A in the middle;

[0048] Figure 5 A schematic diagram of the transmission wheel provided in an embodiment of this utility model;

[0049] Figure 6 This is a schematic diagram of the connection structure between the transmission wheel and the movable seat;

[0050] Figure 7 This is a schematic diagram of the connection structure between the flexible connector and the sucker rod.

[0051] Figure 8 A perspective view of the oil pumping equipment provided in an embodiment of this utility model.

[0052] Figure label:

[0053] 10-Base; 11-Rail; 15-Moving seat; 16-Rolling element; 17-Mounting seat; 20-Actuating component; 21-Drum; 22-Flexible connector; 23-Drive motor; 30-Synchronization component; 31-Screw; 32-Transmission wheel; 33-Shaft sleeve; 40-Intermediate transmission mechanism; 41-Driving pulley; 42-Driven pulley; 43-Belt; 50-Pressure wheel; 51-Swing bracket; 52-Adjusting bolt; 60-Thrust bearing; 61-Seated ring; 62-Middle ring; 70-Pump plunger; 71-Sucker rod; 80-Wellhead sealing device. Detailed Implementation

[0054] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0055] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] The present invention will be further explained below with reference to specific embodiments.

[0058] like Figure 1-5 As shown in Figure 8, the oil pumping device provided in this embodiment includes: a base 10, a movable base 15, an execution component 20, and a synchronization component 30.

[0059] The execution component 20 includes a roller 21, a flexible connector 22, and a drive component. The drive component is used to drive the roller 21 to rotate. In this embodiment, the drive component is a drive motor 23, which drives the roller to rotate through a transmission mechanism.

[0060] One end of the flexible connector 22 is wrapped around the roller 21, and the other end hangs down to extend into the wellhead and connect to the plunger of the pump via the sucker rod or directly.

[0061] The execution component 20 is disposed on the movable base 15;

[0062] The movable seat 15 is movably disposed on the base 10 along the axial direction of the roller 21; the movable seat 15 can carry the roller 21 and the flexible connector 22 and move along the axial direction of the roller 21.

[0063] The synchronization component 30 includes a threaded transmission pair and an intermediate transmission mechanism 40;

[0064] The threaded transmission pair includes a screw 31 and a transmission wheel 32;

[0065] The screw 31 is fixedly mounted on the base 10;

[0066] The axial direction of the screw 31 is parallel to the axial direction of the drum 21;

[0067] The transmission wheel 32 is mounted on the screw 31, and the center of the transmission wheel 32 has an internal thread hole that matches the external thread of the screw 31. The transmission wheel 32 is rotatably connected to the movable seat 15 in the circumferential direction and relatively fixed in the axial direction; or, the transmission wheel 32 is rotatably mounted on the movable seat 15 in the circumferential direction and relatively fixed in the axial direction. That is, when the screw 31 rotates, the above-described connection structure forces the movable seat 15 to move synchronously with the transmission wheel 32 along the axial direction of the screw 31.

[0068] The two ends of the intermediate transmission mechanism 40 are respectively connected to the drum 21 and the transmission wheel 32, and are used for transmission between the drum 21 and the transmission wheel 32. When the drum 21 rotates, the transmission wheel 32 is driven to rotate through the intermediate transmission mechanism 40, and then the drum 21 is driven to move synchronously along the axial direction of the drum 21 through the cooperation of the threaded transmission pair, thereby offsetting the offset of the flexible connector 22, and thus always keeping the free end of the flexible connector 22 consistent with the center of the wellhead, that is, maintaining the coaxiality of the two.

[0069] In this application, the transmission wheel 32, the roller 21, and the movable seat 15 are relatively fixed in the axial direction of the transmission wheel 32 and the roller 21, so they can move synchronously. When the roller 21 drives the transmission wheel 32 to rotate, the transmission wheel 32 is forced to move along the movable seat 15 along the axial direction of the screw 31 (i.e., the axial direction of the transmission wheel 32 or the roller 21) through the threaded transmission structure between the transmission wheel 32 and the screw 31. The transmission wheel 32 is forced to move synchronously with the movable seat 15 and the roller 21 through the connection structure between the transmission wheel 32 and the movable seat 15. In other words, the roller 21, the transmission wheel 32, and the movable seat 15 will move synchronously along the axial direction of the roller 21 as the roller 21 rotates. This also enables the other end of the flexible connector 22 to move synchronously along the axial direction of the roller 21 as the roller 21 rotates, thus achieving the adjustment of its centering position.

[0070] Furthermore, this application only requires basic alignment in the left and right directions (accurate alignment is not required). By removing the intermediate transmission mechanism 40 such as the synchronous displacement drive belt (or chain) and rotating the transmission wheel 32, the flexible polished rod can be adjusted to align with the wellhead center. The wellhead alignment can be adjusted quickly, conveniently and accurately without moving the pumping unit.

[0071] The intermediate transmission mechanism 40 is mounted on the movable seat 15 and is used to synchronously drive the rotation of the transmission wheel 32 when the roller 21 rotates.

[0072] In this embodiment, the intermediate transmission mechanism 40 can be a belt transmission mechanism, a chain transmission mechanism, or a gear transmission mechanism.

[0073] See Figure 2 and 3 As shown, the belt drive mechanism includes a driving pulley 41, a driven pulley 42, and a belt 43; the driving pulley 41 is coaxially and fixedly connected to the roller 21; the driven pulley 42 is coaxially and fixedly connected to the transmission wheel 32; or, the outer circumference of the transmission wheel 32 is provided with a belt-locking groove, thereby forming the driven pulley 42. Preferably, the belt drive mechanism is a synchronous belt drive mechanism.

[0074] See Figure 2 and 4 As shown, preferably, the movable seat 15 is provided with a pressure roller 50 for increasing the tension of the belt 43. The pressure roller 50 is mounted on the movable seat 15 via a swing bracket 51. An adjusting bolt 52 is provided on the side of the swing bracket 51 away from the pressure roller 50. The adjusting bolt 52 is screwed into a threaded hole in the movable seat 15, and the top of the adjusting bolt 52 abuts against the back of the swing bracket 51. By adjusting the screw-out length of the adjusting bolt 52, the pressure of the pressure roller 50 on the belt 43 is adjusted, thereby adjusting the tension of the entire belt 43. More preferably, two sets of pressure rollers 50, swing brackets 51, and adjusting bolts 52 can be provided, respectively arranged on both sides of the center line connecting the driving pulley 41 and the driven pulley 42.

[0075] Alternatively, the intermediate transmission mechanism 40 can also be a chain drive mechanism; the chain drive mechanism includes a driving sprocket, a driven sprocket, and a chain; the driving sprocket is coaxially and fixedly connected to the roller 21; the driven sprocket is coaxially and fixedly connected to the transmission wheel 32; or, the outer circumference of the transmission wheel 32 is provided with chain-fastening teeth, thereby forming the driven sprocket. Its specific structure is shown in the attached drawings of the belt drive mechanism above.

[0076] Alternatively, the intermediate transmission mechanism 40 can also be a gear transmission mechanism, comprising a driving gear and a driven gear (not shown); the driving gear is coaxially and fixedly connected to the roller 21; the driven gear is coaxially and fixedly connected to the transmission wheel 32; or, the outer circumference of the transmission wheel 32 is provided with a toothed structure, thereby forming the driven gear; the driving gear and the driven gear directly mesh, or the driving gear is connected to the driven gear through one or more intermediate gears. Preferably, the driving gear and the driven gear are bevel gears; it also includes an intermediate transmission shaft, which is rotatably mounted on the movable seat 15, and bevel gears are provided at both ends of the intermediate transmission shaft to mesh with the driving gear and the driven gear respectively.

[0077] See Figure 6 As shown, preferably, a thrust bearing 60 is provided between the transmission wheel 32 and the movable seat 15; the thrust bearing 60 includes a middle ring 62, two seat rings 61 and a plurality of rollers; the middle ring 62 is fixedly connected to the transmission wheel 32, and the seat rings 61 are fixedly connected to the movable seat 15, thereby realizing that the transmission wheel 32 and the movable seat 15 can be rotatably connected in the circumferential direction and are relatively fixed in the axial direction.

[0078] In this embodiment, the movable base 15 is provided with a mounting base 17, and the mounting base 17 is provided with mounting holes; see also Figure 5 and 6 As shown, a bushing 33 is coaxially fixedly connected to one side of the drive wheel 32 (i.e., the driven pulley 42). The drive wheel 32 is inserted into the mounting hole of the mounting base 17 through the bushing 33. The drive wheel 32 protrudes from the mounting hole. The bushing 33 is fixedly connected to the middle ring 62 of the thrust bearing 60.

[0079] Preferably, the bushing portion 33 and the transmission wheel 32 are integrally formed. Alternatively, the bushing portion 33 and the transmission wheel 32 are separately formed and fixedly connected by fasteners such as bolts.

[0080] Preferably, the thrust bearing 60 is disposed between the bushing portion 33 and the mounting hole. A limiting ring is provided on the bushing portion 33. After the middle ring 62 is fitted onto the bushing portion 33 with one end face abutting against the limiting ring, it can be locked or at least axially limited using components such as a snap ring, pin, or pressure cap. Preferably, a pressure cap structure is used. The pressure cap is fixedly connected to the bushing portion 33 by bolts or screws. The end face of the pressure cap abuts against the other end face of the middle ring 62, fixing the middle ring 62 while simultaneously transmitting force when the transmission wheel 32 synchronously drives the moving seat 15 and the roller 21 to reciprocate axially.

[0081] The flexible connector 22 can be a flexible rod or a steel wire rope. The steel wire rope is preferably a coated and / or filled steel wire rope; such as a solid polymer coated steel wire rope or a solid polymer filled steel wire rope.

[0082] See Figure 7 As shown, the other end of the flexible connector 22 extends into the well after passing through the wellhead sealing device 80. The other end of the flexible connector 22 is connected to the upper end of the sucker rod 71 via a flange or other connecting structure, while the lower end of the sucker rod 71 is connected to the pump plunger 70. Alternatively, the other end of the flexible connector 22 can be connected to the pump plunger 70 via a flange or other connecting structure, pulling the pump plunger 70 up and down. The above connection structures are existing technology and will not be described in detail here.

[0083] Preferably, the base 10 is provided with a track 11, and the movable seat 15 is mounted on the track 11 by rolling elements 16 such as rollers and pulleys.

[0084] This utility model has a simple and ingenious structure, which can realize the lateral movement of the roller 21 and its driving components as a whole with the rotation of the roller 21. The adjustment structure is more flexible and easy to promote and adapt to a wide range of applications.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil pumping device, characterized in that, include: Base, moving base, execution components, and synchronization components; The execution component includes a roller, a flexible connector, and a drive component, wherein the drive component is used to drive the roller to rotate. One end of the flexible connector is wrapped around the roller, and the other end hangs down to extend into the wellhead and connect with the plunger of the oil pump. The execution component is mounted on the movable base; The movable seat is movably mounted on the base along the axial direction of the roller; The synchronization component includes a threaded drive pair and an intermediate drive mechanism; The threaded transmission pair includes a screw and a transmission wheel; The screw is fixedly mounted on the base; The axial direction of the screw is parallel to the axial direction of the drum; The transmission wheel is mounted on the screw, and the center of the transmission wheel is provided with an internal thread hole that matches the external thread of the screw; and the transmission wheel is rotatably connected to the movable 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 drum and the transmission wheel, and are used for transmission between the drum and the transmission wheel. When the drum rotates, the transmission wheel is driven to rotate through the intermediate transmission mechanism, and then the moving seat and the drum move synchronously along the drum axis through the cooperation of the threaded transmission pair.

2. The oil pumping equipment according to claim 1, characterized in that, The intermediate transmission mechanism is a belt drive mechanism, a chain drive mechanism, or a gear drive mechanism.

3. The oil pumping equipment according to claim 2, characterized in that, The belt drive mechanism includes a driving pulley, a driven pulley, and a belt; The drive pulley is fixedly connected to the roller coaxially; The driven pulley is coaxially and fixedly connected to the transmission wheel; or, the outer circumference of the transmission wheel is provided with a belt-locking groove, thereby forming the driven pulley.

4. The oil pumping equipment according to claim 3, characterized in that, The belt drive mechanism is a synchronous belt drive mechanism.

5. The oil pumping equipment according to claim 2, characterized in that, The chain drive mechanism includes a driving sprocket, a driven sprocket, and a chain; The drive sprocket is fixedly connected to the roller coaxially; The driven sprocket is coaxially and fixedly connected to the transmission wheel; or, the outer circumference of the transmission wheel is provided with chain-fastening teeth, thereby forming the driven sprocket.

6. The oil pumping equipment according to claim 2, characterized in that, The gear transmission mechanism includes a driving gear and a driven gear; The drive gear is fixedly connected to the roller coaxially; The driven gear is coaxially and fixedly connected to the transmission wheel; or, the outer circle of the transmission wheel is provided with a tooth structure, thereby forming the driven gear. The driving gear and the driven gear mesh directly, or the driving gear is connected to the driven gear through one or more intermediate gears.

7. The oil pumping equipment according to claim 6, characterized in that, The driving gear and driven gear are bevel gears; it also includes an intermediate drive shaft, which is rotatably mounted on the movable seat, and bevel gears are provided at both ends of the intermediate drive shaft to mesh with the driving gear and driven gear respectively.

8. The oil pumping equipment according to claim 1, characterized in that, A thrust bearing is provided between the transmission wheel and the movable seat. The thrust bearing includes a middle ring, two seat rings, and multiple rollers. The middle ring is fixedly connected to the transmission wheel, and the seat rings are fixedly connected to the movable seat, thereby realizing a circumferentially rotatable and axially fixed connection between the transmission wheel and the movable seat.

9. The oil pumping equipment according to claim 8, characterized in that, The movable base is provided with a mounting hole; it also includes a bushing portion that is coaxially and fixedly connected to the transmission wheel, and the transmission wheel is inserted into the mounting hole through the bushing portion.

10. The oil pumping equipment according to claim 9, characterized in that, The bushing is integrally formed with the transmission wheel.

11. The oil pumping equipment according to claim 3, characterized in that, The movable seat is equipped with a pressure roller for increasing the tension of the belt.

12. The oil pumping equipment according to claim 1, characterized in that, The flexible connector is a flexible rod, or a covered and / or filled steel wire rope.

13. The oil pumping equipment according to claim 1, characterized in that, The base is provided with a track, and the movable seat is mounted on the track by a rolling element.

Images