Oil pumping equipment

Abstract

The utility model provides oil pumping equipment. The oil pumping equipment comprises a base, a roller, a guide wheel, an adjusting support, a flexible polish rod, a telescopic mechanism and a driving device. The roller is rotatably arranged on the base; the driving device is used for driving the roller to rotate; one end of the flexible polish rod is wound on the roller, and the other end of the flexible polish rod droops after bypassing the guide wheel and is used for extending into a wellhead to be connected with an oil well pump; the guide wheel is rotatably arranged at the top of the adjusting bracket; the bottom of the adjusting bracket is pivoted with the base; one end of the telescopic mechanism is pivoted with the adjusting bracket, the other end of the telescopic mechanism is pivoted with the base, and the telescopic mechanism is used for adjusting the distance of the other end of the flexible polished rod extending out of the base; and a pivoting point of the other end of the telescopic mechanism and the base is arranged on the outer side of the adjusting bracket. The device is simpler and more stable in structure, more reliable in working process and not easy to damage, and the maintenance cost is greatly reduced.

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] With the continuous deepening of oilfield development, the number of deep wells, heavy oil wells, low permeability wells, etc. increases year by year. Using the oil production method of short stroke and high stroke frequency of conventional beam pumping equipment has problems such as large stroke loss, low pump efficiency, high energy consumption, and serious wear of downhole rods and pipes; the tower-type pumping equipment has a long stroke, a reduced stroke frequency, and the pump efficiency is improved. However, due to the increase in the tower height, the stability of the tower is reduced, it is difficult to achieve a longer stroke, which limits the further improvement of the pump efficiency and the further extension of the workover period, and it is difficult to maintain the top facilities.

[0003] The existing ultra-long stroke pumping equipment applies the technology of flexible sucker rods and a drum winding flexible sucker rods to achieve ultra-long stroke oil production. There are problems such as the need for workover to make the displacement machine operation complex, difficult alignment adjustment of the flexible sucker rod and the wellhead, and the impact of the motor generating electricity during the downstroke of the pumping equipment on the power grid. At the same time, due to the increase in the configured motor power, a corresponding wellsite power supply transformer needs to be configured under the condition of meeting the requirement of the daily liquid production of the original well. 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 guide wheel, an adjustment bracket, a flexible polished rod, a telescopic mechanism, and a driving device;

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

[0007] The driving device is used to drive the drum to rotate;

[0008] One end of the flexible polished rod is wound on the drum, and the other end hangs down after passing around the guide wheel for extending into the wellhead to be connected with the oil pump;

[0009] The guide wheel is rotatably arranged on the top of the adjustment bracket;

[0010] The bottom of the adjustment bracket is pivotally connected to the base;

[0011] One end of the telescopic mechanism is pivotally connected to the adjustment bracket, and the other end of the telescopic mechanism is pivotally connected to the base, for adjusting the distance that the other end of the flexible polished rod extends out of the base;

[0012] The pivot point of the other end of the telescopic mechanism and the base is arranged outside the adjustment bracket. That is, the pivot point of the telescopic mechanism and the base is arranged close to the edge of the base, and the adjustment bracket is arranged between the telescopic mechanism and the drum. The telescopic mechanism, the adjustment bracket and the drum are arranged in sequence.

[0013] In this application, the adjustment bracket inclines forward so that the other end (i.e., the free end) of the flexible optical rod extends out of the base and extends into the well after sagging. The telescopic mechanism is arranged outside the adjustment bracket to form a leg structure for supporting the adjustment bracket. Compared with other adjustment structures, this application is simpler and more stable, the working process is more reliable, not easily damaged, and greatly reduces the maintenance cost.

[0014] Further, the telescopic mechanism is an electric, pneumatic or hydraulic telescopic device, such as a cylinder, a hydraulic cylinder, etc.

[0015] Further, the telescopic mechanism is a manual telescopic mechanism, including: a screw rod and a threaded sleeve;

[0016] Threaded sections with opposite spiral directions are respectively arranged at both ends of the screw rod, and internal threads adapted to the two threaded sections are respectively arranged in the two threaded sleeves; by rotating the screw rod, the two threaded sections at both ends are synchronously screwed out or into the two threaded sleeves, thereby realizing elongation or shortening;

[0017] Or, internal threaded sections with opposite spiral directions are respectively arranged at both ends of the threaded sleeve, and external threads adapted to the two internal threaded sections are respectively arranged on the two screw rods; by rotating the threaded sleeve, the screw rods on both sides are synchronously screwed out or into both ends of the threaded sleeve, thereby realizing elongation or shortening.

[0018] Further, a spiral groove is arranged on the outer circumference of the drum for rod discharging.

[0019] Further, the driving device includes a motor; and further includes an energy storage unit. The motor is connected to the energy storage unit. When the other end of the flexible optical rod descends (i.e., during the downstroke of the pumping equipment), the motor is dragged to rotate reversely, and the motor generates electricity. The energy storage unit is used to store the electric energy generated by the motor; when the other end of the flexible optical rod ascends (i.e., during the upstroke of the pumping equipment), the energy storage unit supplies power to the motor to drive the motor to rotate forward, and then the flexible optical rod is wound up by the drum.

[0020] Further, an inverter is further included, and the energy storage unit is connected to the motor through the inverter.

[0021] Further, the energy storage unit is a storage battery or a super capacitor.

[0022] Further, the motors of multiple pumping equipments are connected in parallel and connected to the energy storage unit through a DC bus.

[0023] That is, multiple motors reverse and generate electricity simultaneously or alternately, and transmit the electric energy to the energy storage unit through the DC bus for storage.

[0024] Furthermore, it further includes a solar power generation component, which is connected to the energy storage unit and is used to store the electric energy generated by the solar power generation component.

[0025] Furthermore, it further includes a control system, which controls the forward and reverse rotation of the motor, is used for the conversion between the upstroke and the downstroke of the pumping equipment, and adjusts the stroke, stroke frequency, commutation, acceleration, etc.; the control system can also collect the operation information of the oil well simultaneously.

[0026] Among them, the energy storage system is used to store and provide electric energy; during the downstroke of the pumping equipment, the gravity of the downhole rod string drags the motor to reverse and generate electricity, and the electric energy is stored in the energy storage unit without affecting the power grid, and the power grid can supplement electric energy to the energy storage system simultaneously; when the pumping equipment is in the upstroke, the energy storage system provides electric energy to drive the motor to rotate forward, drives the drum to rotate through the transmission mechanism, winds the flexible polished rod and at the same time lifts the downhole rod pump upward to realize pumping well fluid.

[0027] Furthermore, the motor includes an electromagnetic brake, which is a normally closed brake and is installed at the tail of the motor housing for braking after the motor stops.

[0028] Preferably, it further includes a reducer, and the motor is connected to the drum through the reducer.

[0029] Furthermore, a horizontal axis is provided at the top of the adjusting bracket, and the guide wheel is sleeved on the horizontal axis in an axially position-adjustable manner.

[0030] The guide wheel is slidably arranged along the horizontal axis for adjusting the lateral position of the guide wheel, thereby facilitating the centering of the flexible polished rod with the wellhead. After centering, the guide wheel is fixed by fasteners such as fastening screws, pin shafts or wedge keys.

[0031] More preferably, the bottom of the adjusting bracket is pivotally arranged on the axle seat on the base through a main shaft; in the axial direction of the main shaft, the adjusting bracket is slidably arranged relative to the axle seat, thereby being used to adjust the displacement of the guide wheel and the other end of the flexible polished rod to realize the centering of the other end of the flexible polished rod with the wellhead.

[0032] Furthermore, it further includes an adjusting bolt, which is screwed into the threaded hole on the axle seat, and the top of the adjusting bolt abuts against the adjusting bracket. By screwing in the adjusting bolt, the adjusting bracket is forced to move along the main shaft. Thus, the centering adjustment of the other end of the flexible polished rod with the wellhead is realized.

[0033] Further, it includes two sets or two adjusting bolts symmetrically arranged on the left and right, respectively used to force the adjusting bracket to move along the main shaft in two directions, left and right. After all the adjusting bolts symmetrically arranged on the left and right are tightened, it can also play a role in axially limiting the adjusting bracket.

[0034] Optionally, it includes an electric, pneumatic or hydraulic telescopic mechanism, used to force the adjusting bracket to move along the main shaft in two directions, left and right, thereby adjusting the displacement of the guide wheel and the other end of the flexible optical rod, and realizing the centering of the other end of the flexible optical rod with the wellhead.

[0035] Further, the guide wheel is rotatably arranged on the adjusting bracket through a pulley shaft and a bearing; a lubricating oil path communicating with the bearing is arranged inside the pulley shaft, and an oil inlet is arranged on the end face of the pulley shaft, and a grease cup is arranged on the oil inlet.

[0036] Further, a rope groove for limiting the flexible optical rod is arranged on the outer circle of the guide wheel; a protective pad is arranged in the rope groove to avoid the direct friction between the flexible optical rod and the guide wheel and prevent the flexible optical rod from being worn.

[0037] The protective pad is preferably made of rubber (such as ethylene propylene diene monomer rubber), plastic or resin material. The protective pad is integrally annular, and in terms of its cross-section, a U-shaped ring groove for accommodating the flexible optical rod is arranged on the protective pad. The U-shaped ring groove can avoid the contact and friction between the flexible optical rod and the bottom surface and side surface of the guide wheel rope groove. In addition, the protective pad is of a U-shaped structure, enabling the deformation generated when the flexible optical rod is wound on the drum surface to be restored, and further improving the reliability of the wellhead seal.

[0038] Adopting the above technical solution, the utility model has the following beneficial effects:

[0039] A pumping device provided by the utility model, the adjusting bracket inclines forward and makes the other end of the flexible optical rod extend out of the base and droop into the well after entering. The telescopic mechanism is arranged outside the adjusting bracket to form a leg structure. Compared with other adjusting structures, the present application is simpler and more stable, the working process is more reliable and not easily damaged, and the maintenance cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1The front view of the oil pumping equipment provided in Embodiment 1 of the present utility model;

[0042] Figure 2 is Figure 1 the top view of the oil pumping equipment shown;

[0043] Figure 3 The schematic diagram of the energy storage system in Embodiment 2 of the present utility model;

[0044] Figure 4 The schematic structural diagram of the two-stage intermediate transmission pair in Embodiment 3 of the present utility model;

[0045] Figure 5 The schematic structural diagram of the three-stage intermediate transmission pair in Embodiment 3 of the present utility model;

[0046] Figure 6 The schematic diagram of the bottom pivot connection structure of the adjusting bracket in Embodiment 4;

[0047] Figure 7 The schematic diagram of the guide wheel in Embodiment 4;

[0048] Figure 8 is Figure 7 the partial enlarged view at A in;

[0049] Reference numerals:

[0050] 10 - Base; 11 - Drum; 12 - Guide wheel; 13 - Flexible polished rod; 14 - Main shaft; 15 - Adjusting bolt; 16 - Axle seat; 17 - Pulley shaft; 17a - Lubricating oil path; 18 - Grease cup; 19 - Protective pad; 20 - Adjusting bracket; 21 - Telescopic mechanism; 30 - Driving device; 31 - Motor; 40 - Energy storage unit; 41 - Solar power generation module; 50 - Intermediate transmission pair; 50a - Primary transmission pair; 50b - Secondary transmission pair; 51 - Intermediate shaft; 51a - First intermediate shaft; 51b - Secondary intermediate shaft; 52 - First driving wheel; 53 - First belt; 54 - First driven wheel; 55 - Intermediate wheel; 56 - Driving wheel. Detailed implementation manners

[0051] Next, the technical solutions of the present utility model will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0052] 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 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", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 situations.

[0054] The following further explains and illustrates the present utility model in combination with specific embodiments.

[0055] Embodiment 1

[0056] As Figure 1-2 shown, a pumping device provided in this embodiment includes: a base 10, a drum 11, a guide wheel 12, an adjustment bracket 20, a flexible polished rod 13, a telescopic mechanism 21, and a driving device 30;

[0057] The drum 11 is rotatably arranged on the base 10; the driving device 30 is used to drive the drum 11 to rotate; one end of the flexible polished rod 13 is wound around the drum 11, and the other end hangs down after passing around the guide wheel 12 for extending into the wellhead to be connected with the oil pump; a spiral groove is arranged on the outer circumference of the drum 11 for discharging the rod.

[0058] The guide wheel 12 is rotatably arranged at the top of the adjustment bracket 20; the bottom of the adjustment bracket 20 is pivotally connected to the base 10; one end of the telescopic mechanism 21 is pivotally connected to the adjustment bracket 20, and the other end of the telescopic mechanism 21 is pivotally connected to the base 10 for adjusting the distance that the other end of the flexible polished rod 13 extends out of the base 10.

[0059] The pivot point of the other end of the telescopic mechanism 21 and the base 10 is arranged outside the adjusting bracket 20. That is, the pivot point of the telescopic mechanism 21 and the base 10 is arranged close to the edge of the base 10, and the adjusting bracket 20 is arranged between the telescopic mechanism 21 and the roller 11. The telescopic mechanism 21, the adjusting bracket 20 and the roller 11 are arranged in sequence.

[0060] In this application, the adjusting bracket 20 inclines forward so that the other end (i.e., the free end) of the flexible optical rod 13 extends out of the base 10 and extends into the well after sagging. The telescopic mechanism 21 is arranged outside the adjusting bracket 20 to form a leg structure for supporting the adjusting bracket 20. Compared with other adjusting structures, this application is simpler and more stable, the working process is more reliable, not easily damaged, and greatly reduces the maintenance cost.

[0061] Further, the telescopic mechanism 21 is an electric, pneumatic or hydraulic telescopic device, such as an electric telescopic rod, a cylinder, a hydraulic cylinder, etc.

[0062] Alternatively, the telescopic mechanism 21 can also be a manual telescopic mechanism, for example, including: a screw rod and a threaded sleeve; both ends of the screw rod are respectively provided with threaded sections with opposite spiral directions, and internal threads adapted to the two threaded sections are respectively arranged in the two threaded sleeves; by rotating the screw rod, the two threaded sections at both ends are synchronously screwed out or screwed into the two threaded sleeves, thereby realizing elongation or shortening.

[0063] Preferably, a horizontal shaft is arranged at the top of the adjusting bracket 20, and the guide wheel 12 is sleeved on the horizontal shaft in an axially position-adjustable manner. The guide wheel 12 is slidably arranged along the horizontal shaft for adjusting the lateral position of the guide wheel 12, thereby facilitating the centering of the flexible optical rod 13 with the wellhead. After centering, the guide wheel 12 is fixed by fasteners such as fastening screws, pin shafts or wedge keys.

[0064] The driving device 30 includes a motor 31; the motor 31 is connected to the roller 11 through a speed reducer and its transmission mechanism to drive the roller to rotate forward and backward. And, preferably, the motor 31 includes an electromagnetic brake, and the electromagnetic brake is a normally closed brake, which is installed at the tail of the motor 31 housing for braking after the motor 31 stops.

[0065] In the present utility model, the adjusting bracket 20 inclines forward so that the other end of the flexible optical rod 13 extends out of the base 10 and extends into the well after sagging. The telescopic mechanism 21 is arranged outside the adjusting bracket 20 to form a leg structure. Compared with other adjusting structures, this application is simpler and more stable, the working process is more reliable, not easily damaged, and greatly reduces the maintenance cost.

[0066] Embodiment 2

[0067] This embodiment is basically the same as Embodiment 1, the difference is that:

[0068] Referring to Figure 3 as shown, in this embodiment, the driving device 30 includes a motor 31; and further includes an energy storage unit 40. The motor 31 is connected to the energy storage unit 40. When the other end of the flexible polished rod 13 moves downward (i.e., during the downstroke of the pumping equipment), it drags the motor 31 to reverse, and the motor 31 generates electricity. The energy storage unit 40 is used to store the electric energy generated by the motor 31; when the other end of the flexible polished rod 13 moves upward (i.e., during the upstroke of the pumping equipment), the energy storage unit 40 supplies power to the motor 31 to drive the motor 31 to rotate forward, and then the flexible polished rod 13 is wound up by the drum 11.

[0069] This embodiment further includes an inverter, and the energy storage unit 40 is connected to the motor 31 through the inverter. The energy storage unit 40 can be a storage battery or a super capacitor.

[0070] In practical applications, the motors 31 of multiple pumping equipments are connected in parallel and are connected to the energy storage unit 40 through a DC bus. That is, multiple motors 31 reverse and generate electricity simultaneously or alternately, and the electric energy is transmitted to the energy storage unit 40 through the DC bus and stored.

[0071] Further preferably, it further includes a solar power generation component 41, and the solar power generation component 41 is connected to the energy storage unit 40 to store the electric energy produced by the solar power generation component 41.

[0072] And, it further includes a control system. The control system controls the forward and reverse rotation of the motor 31, for the conversion between the upstroke and downstroke of the pumping equipment, and for adjusting the stroke, stroke frequency, commutation, acceleration, etc.; the control system can also collect the operation information of the oil well at the same time. Preferably, a remote terminal unit RTU is provided for remotely monitoring the operation of the entire energy storage system.

[0073] Among them, the energy storage system is used to store and provide electric energy; during the downstroke of the pumping equipment, the gravity of the downhole rod string drags the motor 31 to reverse and generate electricity, and the electric energy is stored in the energy storage unit 40, without affecting the power grid, and the power grid can supplement electric energy to the energy storage system at the same time; when the pumping equipment is on the upstroke, the energy storage system provides electric energy to drive the motor 31 to rotate forward, and through the transmission mechanism, the drum 11 is driven to rotate, while winding the flexible polished rod 13, the downhole rod pump is lifted upward to realize pumping well fluid.

[0074] Embodiment 3

[0075] This embodiment is basically the same as Embodiment 1, the difference is that:

[0076] Referring to Figure 4 as shown, in this embodiment, the driving device 30 includes a motor 31 and several intermediate transmission pairs 50; the intermediate transmission pairs 50 are belt transmission pairs and / or chain transmission pairs. Preferably, the belt transmission pair is a synchronous belt transmission pair.

[0077] A plurality of levels of the intermediate transmission pairs 50 are connected end to end in transmission, and are arranged between the motor 31 and the drum 11 for driving the drum 11 to rotate. Among them, one or a plurality of intermediate shafts 51 arranged at intervals are rotatably provided on the base 10;

[0078] In the transmission direction from the motor 31 to the drum 11, the intermediate transmission pairs 50 are provided between the motor 31 and the adjacent intermediate shaft 51, between the drum 11 and the adjacent intermediate shaft 51, and between two adjacent intermediate shafts 51.

[0079] Among them, the intermediate shaft 51 is axially parallel to the power output shaft of the motor 31 and the drum 11.

[0080] Among them, the intermediate shaft 51 adjacent to the drum 11 is the first intermediate shaft 51a; the intermediate transmission pair 50 includes a first-stage transmission pair 50a provided between the first intermediate shaft 51a and the drum 11; the first-stage transmission pair 50a includes a first driving wheel 52 and a first driven wheel 54; the first driving wheel 52 is fixedly sleeved on the first intermediate shaft 51a; the first driven wheel 54 is fixedly connected coaxially with the drum 11.

[0081] When the first driving wheel 52 and the first driven wheel 54 are both belt wheels, the first driving wheel 52 and the first driven wheel 54 are connected by a first belt 53; or, when the first driving wheel 52 and the first driven wheel 54 are both sprockets, the first driving wheel 52 and the first driven wheel 54 are connected by a first chain (see the first belt 53).

[0082] Preferably, two groups of first-stage transmission pairs 50a are arranged symmetrically on both sides of the drum 11 and at both ends of the first intermediate shaft 51a. That is, the two first driven wheels 54 are symmetrically arranged on both sides of the drum 11; the two first driving wheels 52 are symmetrically arranged at both ends of the first intermediate shaft 51a.

[0083] Furthermore, one stage or a plurality of stages of the intermediate transmission pairs 50 are provided between the first intermediate shaft 51a and the motor 31. See Figure 4 As shown, the driving device 30 includes two stages of intermediate transmission pairs 50; one stage of intermediate transmission pair 50 is provided between the first intermediate shaft 51a and the motor 31. See Figure 5 As shown, the driving device 30 includes three stages of intermediate transmission pairs 50; two stages of intermediate transmission pairs 50 are provided between the first intermediate shaft 51a and the motor 31, that is, two secondary transmission pairs 50b are provided between the first intermediate shaft 51a and the motor 31.

[0084] A middle wheel 55 is fixedly sleeved on the first intermediate shaft 51a; a driving wheel 56 is fixedly sleeved on the power output shaft of the motor 31.

[0085] See Figure 4 As shown, when the driving device 30 includes two-stage intermediate transmission pairs 50, both the middle wheel 55 and the driving wheel 56 are belt wheels, and the middle wheel 55 and the driving wheel 56 are connected by a belt; alternatively, both the middle wheel 55 and the driving wheel 56 are sprocket wheels, and the middle wheel 55 and the driving wheel 56 are connected by a chain.

[0086] See Figure 5 As shown, when the driving device 30 includes more than three-stage intermediate transmission pairs 50, one or several secondary intermediate shafts 51b are rotatably arranged between the first intermediate shaft 51a and the motor 31 on the base 10 at intervals.

[0087] An intermediate transmission pair 50, namely a secondary transmission pair 50b, is arranged between the secondary intermediate shaft 51b and the motor 31, between the secondary intermediate shaft 51b and the first intermediate shaft 51a, and / or between two adjacent secondary intermediate shafts 51b. The arrangement form of the secondary transmission pair 50b can refer to the form of the primary transmission pair 50a or other belt or chain transmission pairs, which will not be elaborated here.

[0088] The utility model has a simple and ingenious structure, small vibration, low noise, low maintenance cost, and is convenient for popularization and wide adaptation.

[0089] Embodiment 4

[0090] This embodiment is basically the same as Embodiment 1, the difference is that:

[0091] See Figure 6 As shown, in this embodiment, the bottom of the adjusting bracket 20 is rotatably arranged on the shaft seat 16 on the base 10 through the main shaft 14; in the axial direction of the main shaft 14, the adjusting bracket 20 is slidably arranged relative to the shaft seat 16, that is, an adjusting space (adjusting gap) is arranged between the adjusting bracket 20 and the shaft seat 16, so as to adjust the displacement of the guide wheel 12 and the other end of the flexible optical rod 13, and realize the centering of the other end of the flexible optical rod 13 with the wellhead. In this embodiment, the adjusting bracket 20 is composed of two support frames arranged symmetrically left and right.

[0092] This embodiment further includes an adjusting bolt 15, the adjusting bolt 15 is screwed into the threaded hole on the shaft seat 16, the top of the adjusting bolt 15 abuts against the adjusting bracket 20, and by screwing in the adjusting bolt 15, the adjusting bracket 20 is forced to move along the main shaft 14. Thus, the centering adjustment of the other end of the flexible optical rod 13 with the wellhead is realized.

[0093] See Figure 6As shown in the figure, in this embodiment, there are two sets or two symmetrically arranged left and right adjusting bolts 15, which are respectively used to force the adjusting bracket 20 to move along the main shaft 14 in the left and right directions. After all the symmetrically arranged left and right adjusting bolts 15 are tightened, they can also play a role in axially limiting the adjusting bracket 20. Figure 6 In the figure, the two adjusting bolts 15 are arranged on the outer sides of the two legs of the adjusting bracket 20. In another embodiment, the two adjusting bolts 15 are arranged inside the two legs of the adjusting bracket 20, that is, between the two legs, and the heads of the adjusting bolts 15 face outward.

[0094] Optionally, an electric, pneumatic or hydraulic telescopic mechanism is used to replace the adjusting bolt 15. The telescopic mechanism can force the adjusting bracket 20 to move along the main shaft 14 in the left and right directions, thereby adjusting the displacement of the other end of the guide wheel 12 and the flexible optical rod 13, and realizing the centering of the other end of the flexible optical rod 13 with the wellhead.

[0095] See Figure 7 As shown in the figure, the guide wheel 12 is rotatably arranged on the adjusting bracket 20 through a pulley shaft 17 and bearings; a lubricating oil path 17a communicating with the bearings is arranged inside the pulley shaft 17, and an oil inlet is arranged on the end face of the pulley shaft 17, and a grease cup 18 is arranged on the oil inlet.

[0096] See Figure 8 As shown in the figure, a rope groove for limiting the flexible optical rod 13 is arranged on the outer circumference of the guide wheel 12; a protective pad 19 is arranged in the rope groove to prevent the flexible optical rod 13 from directly rubbing against the guide wheel 12 and prevent the flexible optical rod 13 from being worn.

[0097] The protective pad 19 is preferably made of rubber (such as ethylene propylene diene monomer rubber), plastic or resin materials. The protective pad 19 is integrally annular. In terms of its cross-section, a U-shaped ring groove for accommodating the flexible optical rod 13 is arranged on the protective pad 19. The U-shaped ring groove can prevent the flexible optical rod 13 from contacting and rubbing against the bottom and side surfaces of the rope groove of the guide wheel 12. The protective pad is of a U-shaped structure, which enables the deformation generated when the flexible optical rod is wound on the drum surface to be restored, and further improves the reliability of the wellhead seal.

[0098] The structural design of this embodiment is more flexible, convenient for adjustment and centering, and has a low cost, which is convenient for popularization and application.

[0099] 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 described 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, guide wheel, adjustment bracket, flexible polished rod, telescopic mechanism and driving device; The drum is rotatably arranged on the base; The driving device is used to drive the drum to rotate; One end of the flexible polished rod is wound around the drum, and the other end is hung down after passing through the guide wheel, so as to be extended into the wellhead and connected to the oil pump; The guide wheel is rotatably arranged on the top of the adjustment bracket; The bottom of the adjustment bracket is pivotally connected to the base; One end of the telescopic mechanism is pivotally connected to the adjustment bracket, and the other end of the telescopic mechanism is pivotally connected to the base, so as to adjust the distance that the other end of the flexible polished rod protrudes from the base; The pivot point between the other end of the telescopic mechanism and the base is arranged on the outside of the adjustment bracket.

2. The oil pumping equipment according to claim 1, characterized in that: The telescopic mechanism is an electric, pneumatic or hydraulic telescopic device.

3. The oil pumping equipment according to claim 1, characterized in that: The telescopic mechanism is a manual telescopic mechanism, comprising: a screw and a threaded sleeve; The two ends of the screw are respectively provided with thread segments with opposite spiral directions, and the two threaded sleeves are respectively provided with internal threads adapted to the two thread segments; by rotating the screw, the two thread segments at the two ends are synchronously screwed out or screwed into the two threaded sleeves, thereby achieving extension or shortening; Alternatively, the two ends of the threaded sleeve are respectively provided with internal thread segments with opposite spiral directions, and the two screws are respectively provided with external threads adapted to the two internal thread segments; by rotating the threaded sleeve, the screws on both sides are synchronously screwed out or screwed into the two ends of the threaded sleeve, thereby achieving extension or shortening.

4. The oil pumping equipment according to claim 1, characterized in that: A spiral groove is arranged on the outer circle of the drum for arranging rods.

5. The oil pumping equipment according to claim 1, characterized in that: The driving device includes a motor; and also includes an energy storage unit, the motor is connected to the energy storage unit, when the other end of the flexible polished rod goes down, it drags the motor to reverse, the motor generates electricity, and the energy storage unit is used to store the electric energy generated by the motor; when the other end of the flexible polished rod goes up, the energy storage unit supplies power to the motor to drive the motor to rotate forward, and then the flexible polished rod is rolled up by the roller.

6. The oil pumping equipment according to claim 5, characterized in that: It also includes an inverter, and the energy storage unit is connected to the motor through the inverter; The motor comprises an electromagnetic brake which is a normally closed brake installed at the rear of the motor housing and is used for braking after the motor stops.

7. The oil pumping equipment according to claim 5, characterized in that: The energy storage unit is a battery or a super capacitor.

8. The oil pumping equipment according to claim 5, characterized in that: The multiple motors of the multiple oil pumping equipment are arranged in parallel and connected to the energy storage unit via a DC bus.

9. The oil pumping equipment according to claim 5, characterized in that: It also includes a solar power generation component, which is connected to the energy storage unit and is used to store the electrical energy produced by the solar power generation component.

10. The oil pumping equipment according to claim 1, characterized in that: A transverse axis is arranged on the top of the adjusting bracket, and the guide wheel can be adjusted in axial position and mounted on the transverse axis.

11. The oil pumping equipment according to claim 1, characterized in that: The bottom of the adjustment bracket is rotatably arranged on the shaft seat on the base through the main shaft; in the axial direction of the main shaft, the adjustment bracket can be slidably arranged relative to the shaft seat, and is further used to adjust the displacement of the guide wheel and the other end of the flexible light rod to achieve the alignment of the other end of the flexible light rod with the wellhead.

12. The oil pumping equipment according to claim 11, characterized in that: It also includes an adjusting bolt, which is screwed into a threaded hole on the shaft seat. The top of the adjusting bolt abuts against the adjusting bracket. By screwing in the adjusting bolt, the adjusting bracket is forced to move along the main axis, thereby realizing the centering adjustment of the other end of the flexible light rod and the wellhead.

13. The oil pumping equipment according to claim 12, characterized in that: It comprises two groups or two adjusting bolts symmetrically arranged on the left and right sides, which are respectively used to force the adjusting bracket to move in the left and right directions along the main axis. After all the adjusting bolts symmetrically arranged on the left and right sides are tightened, they play the role of axially limiting the adjusting bracket.

14. The oil pumping equipment according to claim 1, characterized in that The guide wheel is rotatably arranged on the adjustment bracket through a pulley shaft and a bearing; a lubricating oil circuit connected to the bearing is arranged in the pulley shaft, and an oil inlet is arranged on the end surface of the pulley shaft, and a pressure injection oil cup is arranged on the oil inlet.

15. The oil pumping equipment according to claim 1, characterized in that A rope groove for limiting the position of the flexible polished rod is arranged on the outer circle of the guide wheel; a protective pad is arranged in the rope groove to prevent the flexible polished rod from directly rubbing against the guide wheel and preventing the flexible polished rod from being worn.

16. The oil pumping equipment according to claim 15, characterized in that The protective pad is annular in shape as a whole, and is provided with a U-shaped annular groove for accommodating the flexible polished rod.

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