CN223034975U - Oil pumping equipment - Google Patents

Abstract

The utility model provides oil pumping equipment which comprises a base, a roller, a guide wheel, an adjusting support, a flexible polish rod, a telescopic mechanism and a driving device, wherein 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, the other end of the flexible polish rod is hung down after bypassing the guide wheel and is used for extending into a wellhead to be connected with an oil pump, the guide wheel is rotatably arranged at the top of the adjusting support, the bottom of the adjusting support is pivoted with the base, one end of the telescopic mechanism is pivoted with the adjusting support, the other end of the telescopic mechanism is pivoted with the base and is used for adjusting the distance of the other end of the flexible polish rod stretching out of the base, and a pivot point of the other end of the telescopic mechanism and the base is arranged at the outer side of the adjusting support. The utility model has simpler and more stable structure, more reliable working process, difficult damage and greatly reduced maintenance cost.

Description

Oil pumping equipment

Technical Field

The utility model relates to the technical field of petroleum exploitation equipment, in particular to oil pumping equipment.

Background

With the continuous deep entry of oil field development, deep wells, thickened oil wells, low-permeability wells and the like are increased year by year, the problems of large stroke loss, low pump efficiency, high energy consumption, serious underground rod and pipe abrasion and the like exist by utilizing the oil extraction mode of short stroke and quick stroke of the conventional walking beam type oil pumping equipment, the stroke of the tower type oil pumping equipment is long, the stroke is reduced, the pump efficiency is improved, but the stability of the tower is reduced due to the increase of the height of the tower, the longer stroke is difficult to realize, the further improvement of the pump efficiency is limited, the further extension of the well repairing period is limited, and the maintenance of top facilities is difficult.

The existing ultra-long stroke oil pumping equipment adopts a flexible pumping rod, and the technology that a winding drum winds the flexible pumping rod realizes ultra-long stroke oil extraction. The well repair is needed to make the operation of the displacement machine complex, the centering adjustment of the flexible sucker rod and the wellhead is difficult, the power generation of the motor is influenced on the power grid during the downstroke of the pumping equipment, and the like, and meanwhile, the corresponding well site power supply transformer is needed to be configured under the requirement of ensuring the daily liquid yield of the original well due to the increase of the power of the configured motor.

Disclosure of utility model

The utility model aims to provide oil pumping equipment so as to solve at least one technical problem in the prior art.

In order to solve the technical problems, the utility model provides oil pumping equipment which comprises a base, a roller, a guide wheel, an adjusting bracket, a flexible polish rod, a telescopic mechanism and a driving device, wherein the roller is arranged on the base;

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 is hung down after bypassing the guide wheel and is used for extending into a wellhead to be connected with an oil 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, and the other end of the telescopic mechanism is pivoted with the base and used for adjusting the distance that the other end of the flexible polish rod protrudes out of the base;

The pivot point of the other end of the telescopic mechanism and the base is arranged at the outer side of the adjusting bracket. That is, the pivot point of the telescopic mechanism and the base is arranged near the edge of the base, and the adjusting bracket is arranged between the telescopic mechanism and the roller. The telescopic mechanism, the adjusting bracket and the roller are sequentially arranged.

In the application, the support is adjusted to incline forwards, and the other end (namely the free end) of the flexible polish rod extends out of the base, enters the sagging and then extends into the well. The telescopic mechanism is arranged on the outer side of the adjusting bracket to form a supporting leg structure and used for supporting the adjusting bracket, compared with other adjusting structures, the telescopic mechanism is simpler and more stable, the working process is more reliable, the telescopic mechanism is not easy to damage, and the maintenance cost is greatly reduced.

Further, the telescopic mechanism is an electric, pneumatic or hydraulic telescopic device. Such as a cylinder, hydraulic cylinder, etc.

Further, the telescopic mechanism is a manual telescopic mechanism and comprises a screw rod and a threaded sleeve;

The screw rod is characterized in that two ends of the screw rod are respectively provided with a threaded section with opposite screw directions, and two threaded sleeves are respectively internally provided with internal threads matched with the two threaded sections;

Or two ends of the threaded sleeve are respectively provided with an internal thread section with opposite screw directions, two screws are respectively provided with external threads matched with the two internal thread sections, and the screws on two sides synchronously unscrew or screw into the two ends of the threaded sleeve by rotating the threaded sleeve, so that the extension or shortening is realized.

Further, a spiral groove is formed in the outer circle of the roller and used for arranging rods.

The driving device further comprises a motor and an energy storage unit, wherein the motor is connected with the energy storage unit, the motor is dragged to rotate reversely when the other end of the flexible polish rod is downward (namely when the oil pumping equipment is in a downward stroke), the motor generates electricity, the energy storage unit is used for storing electric energy generated by the motor, and when the other end of the flexible polish rod is upward (namely when the oil pumping equipment is in an upward stroke), the energy storage unit supplies electricity to the motor and is used for driving the motor to rotate positively, and then the flexible polish rod is rolled up through a roller.

Further, the motor further comprises an inverter, and the energy storage unit is connected with the motor through the inverter.

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

Further, a plurality of motors of the oil pumping equipment are arranged in parallel, and are connected with the energy storage unit through a direct current bus.

That is, a plurality of motors are simultaneously or alternately reversed to generate electricity, and the electricity is supplied to the energy storage unit through the dc bus and stored.

Further, the solar energy power generation system also comprises a solar energy power generation assembly, wherein the solar energy power generation assembly is connected with the energy storage unit and used for storing electric energy produced by the solar energy power generation assembly.

The oil well control system further comprises a control system, the control system controls the motor to rotate positively and negatively, the control system is used for switching between the upper stroke and the lower stroke of the oil pumping equipment, adjusting the stroke, the stroke frequency, the reversing, the acceleration and the like, and the control system can also collect oil well operation information at the same time.

The energy storage system is used for storing and providing electric energy, the underground rod post gravity drags the motor to reversely rotate to generate electricity when the oil pumping equipment is in a down stroke, the electric energy is stored in the energy storage unit, the electric energy does not affect the power grid, the power grid can supplement the electric energy to the energy storage system at the same time, when the oil pumping equipment is in an up stroke, the energy storage system provides the electric energy to drive the motor to rotate in a forward direction, the roller is driven to rotate through the transmission mechanism, and the underground rod pump is lifted to ascend while winding the flexible polished rod, so that well liquid is pumped.

Further, the motor comprises an electromagnetic brake, wherein the electromagnetic brake is a normally closed brake and is arranged at the tail part of the motor shell and used for braking after the motor is stopped.

Preferably, the drum washing machine further comprises a speed reducer, and the motor is connected with the drum through the speed reducer.

Further, the top of the adjusting bracket is provided with a transverse shaft, and the guide wheel can be sleeved on the transverse shaft along the axial position in an adjustable way.

The guide wheel can be arranged along the transverse shaft in a sliding way and is used for adjusting the transverse position of the guide wheel, so that the flexible polished rod is convenient to center with the wellhead. After centering, the guide wheel is fixed by using fastening screws, pin shafts or wedge keys and other fasteners.

More preferably, the bottom of the adjusting bracket is arranged on a shaft seat on the base in a swinging way through a main shaft, and the adjusting bracket can be arranged in a sliding way relative to the shaft seat in the axial direction of the main shaft, so as to be used for adjusting the displacement of the guide wheel and the other end of the flexible polish rod, thereby realizing the centering of the other end of the flexible polish rod and a wellhead.

Further, the device also comprises an adjusting bolt, the adjusting bolt is screwed into a threaded hole in the shaft seat, the top of the adjusting bolt is abutted against the adjusting bracket, and the adjusting bracket is forced to move along the main shaft by screwing in the adjusting bolt. Thereby realizing the centering adjustment of the other end of the flexible polished rod and the wellhead.

Further, the adjusting device comprises two groups or two adjusting bolts which are symmetrically arranged left and right and are respectively used for forcing the adjusting bracket to move along the main shaft in two left and right directions. After all the adjusting bolts which are symmetrically arranged left and right are screwed, the axial limiting effect of the adjusting bracket can be achieved.

Optionally, the device comprises an electric, pneumatic or hydraulic telescopic mechanism which is used for forcing the adjusting bracket to move leftwards and rightwards along the main shaft so as to adjust the displacement of the guide wheel and the other end of the flexible polished rod, thereby realizing the centering of the other end of the flexible polished rod and a wellhead.

The guide wheel is rotatably arranged on the adjusting bracket through a pulley shaft and a bearing, a lubricating oil way communicated with the bearing is arranged in the pulley shaft, an oil inlet is formed in the end face of the pulley shaft, and a pressure oil injection cup is arranged on the oil inlet.

Further, a rope groove used for limiting the flexible polish rod is formed in the outer circle of the guide wheel, and a protection pad is arranged in the rope groove and used for preventing the flexible polish rod from directly rubbing the guide wheel and preventing the flexible polish rod from being worn.

The protective pad is preferably made of rubber (such as ethylene propylene diene monomer), plastic or resin material. The protection pad is annular on the whole, and the U-shaped annular groove for accommodating the flexible polish rod is arranged on the protection pad in terms of the cross section of the protection pad. The U-shaped ring groove can avoid contact and friction between the flexible polish rod and the bottom surface and the side surface of the rope groove of the guide wheel. In addition, the protection pad is of a U-shaped structure, so that deformation generated when the flexible polish rod is wound on the surface of the roller is recovered, and the reliability of wellhead sealing is further improved.

By adopting the technical scheme, the utility model has the following beneficial effects:

According to the oil pumping equipment provided by the utility model, the forward inclination of the support is regulated, the other end of the flexible polished rod extends out of the base, and the flexible polished rod extends into a well after entering into sagging. The telescopic mechanism is arranged on the outer side of the adjusting bracket to form a supporting leg structure, and compared with other adjusting structures, the telescopic mechanism is simpler and more stable, the working process is more reliable, the telescopic mechanism is not easy to damage, and the maintenance cost is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a pumping apparatus according to example 1 of the present utility model;

FIG. 2 is a top view of the oil pumping apparatus shown in FIG. 1;

FIG. 3 is a schematic diagram of an energy storage system according to embodiment 2 of the present utility model;

FIG. 4 is a schematic structural diagram of a two-stage intermediate transmission pair in embodiment 3 of the present utility model;

FIG. 5 is a schematic structural diagram of a three-stage intermediate transmission pair in embodiment 3 of the present utility model;

FIG. 6 is a schematic view of a bottom pivoting structure of an adjusting bracket in embodiment 4;

fig. 7 is a schematic structural view of a guide wheel in embodiment 4;

fig. 8 is a partial enlarged view of fig. 7 at a.

Reference numerals:

10-base, 11-roller, 12-guide wheel, 13-flexible polish rod, 14-main shaft, 15-adjusting bolt, 16-shaft seat, 17-pulley shaft, 17 a-lubricating oil path, 18-pressure oil cup, 19-protection pad, 20-adjusting bracket, 21-telescopic mechanism, 30-driving device, 31-motor, 40-energy storage unit, 41-solar power generation assembly, 50-intermediate transmission pair, 50 a-primary transmission pair, 50 b-secondary transmission pair, 51-intermediate shaft, 51 a-first intermediate shaft, 51 b-secondary intermediate shaft, 52-first driving wheel, 53-first belt, 54-first driven wheel, 55-intermediate wheel and 56-driving wheel.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is further illustrated with reference to specific embodiments.

Example 1

1-2, The oil pumping equipment provided by the embodiment comprises a base 10, a roller 11, a guide wheel 12, an adjusting bracket 20, a flexible polished rod 13, a telescopic mechanism 21 and a driving device 30;

The roller 11 is rotatably arranged on the base 10, the driving device 30 is used for driving the roller 11 to rotate, one end of the flexible polish rod 13 is wound on the roller 11, the other end of the flexible polish rod is hung down after bypassing the guide wheel 12 and is used for extending into a wellhead to be connected with an oil pump, and a spiral groove is formed in the outer circle of the roller 11 and is used for discharging rods.

The guide wheel 12 is rotatably arranged at the top of the adjusting bracket 20, the bottom of the adjusting bracket 20 is pivoted with the base 10, one end of the telescopic mechanism 21 is pivoted with the adjusting bracket 20, and the other end of the telescopic mechanism 21 is pivoted with the base 10 for adjusting the distance that the other end of the flexible polish rod 13 extends out of the base 10.

The pivot point between the other end of the telescopic mechanism 21 and the base 10 is disposed outside the adjusting bracket 20. That is, the pivot point of the telescopic mechanism 21 and the base 10 is provided near the edge of the base 10, and the adjustment bracket 20 is provided between the telescopic mechanism 21 and the drum 11. The telescopic mechanism 21, the adjusting bracket 20 and the roller 11 are sequentially arranged.

In the present application, the stand 20 is adjusted to tilt forward and allow the other end (i.e., the free end) of the flexible polish rod 13 to extend beyond the base 10, into the well after sagging. The telescopic mechanism 21 is arranged on the outer side of the adjusting bracket 20 to form a supporting leg structure and is used for supporting the adjusting bracket 20, compared with other adjusting structures, the telescopic mechanism is simpler and more stable, the working process is more reliable, the telescopic mechanism is not easy to damage, and the maintenance cost is greatly reduced.

Further, the telescopic mechanism 21 is an electric, pneumatic or hydraulic telescopic device. Such as electric telescopic rods, air cylinders, hydraulic cylinders, etc.

Alternatively, the telescopic mechanism 21 may be a manual telescopic mechanism, for example, including a screw and threaded sleeves, wherein two ends of the screw are respectively provided with threaded sections with opposite screw directions, two threaded sleeves are respectively provided with internal threads adapted to the two threaded sections, and the two threaded sections at the two ends are synchronously screwed out or screwed into the two threaded sleeves by rotating the screw, so as to realize extension or shortening.

Preferably, a transverse shaft is arranged at the top of the adjusting bracket 20, and the guide wheel 12 is sleeved on the transverse shaft in an adjustable manner along the axial position. The guide wheel 12 can slide along the transverse shaft for adjusting the transverse position of the guide wheel 12, so that the flexible polished rod 13 is convenient to center with the wellhead. After centering, the guide wheel 12 is secured by fasteners such as set screws, pins, or wedge keys.

The driving device 30 comprises a motor 31, and the motor 31 is connected with the roller 11 through a speed reducer and a transmission mechanism to drive the roller to rotate positively and reversely. And, preferably, the motor 31 comprises an electromagnetic brake, which is a normally closed brake, and is installed at the tail of the motor 31 shell for braking after the motor 31 stops.

The utility model adjusts the forward tilting of the support 20 and allows the other end of the flexible polish rod 13 to extend out of the base 10, into the sag and then into the well. The telescopic mechanism 21 is arranged on the outer side of the adjusting bracket 20 to form a supporting leg structure, and compared with other adjusting structures, the telescopic mechanism is simpler and more stable, the working process is more reliable, the telescopic mechanism is not easy to damage, and the maintenance cost is greatly reduced.

Example 2

This embodiment is substantially the same as embodiment 1 except that:

Referring to fig. 3, the driving device 30 in this embodiment includes a motor 31, and further includes an energy storage unit 40, where the motor 31 is connected to the energy storage unit 40, the other end of the flexible polish rod 13 drives the motor 31 to rotate reversely when the other end of the flexible polish rod 13 goes down (i.e. when the oil pumping device goes down), the motor 31 generates electricity, the energy storage unit 40 is used to store the electric energy generated by the motor 31, and the energy storage unit 40 supplies power to the motor 31 when the other end of the flexible polish rod 13 goes up (i.e. when the oil pumping device goes up), so as to drive the motor 31 to rotate positively, and further roll up the flexible polish rod 13 through the roller 11.

The present 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 may be a storage battery or a super capacitor.

In practical application, a plurality of motors 31 of the oil pumping devices are arranged in parallel, and are connected with the energy storage unit 40 through a direct current bus. That is, the plurality of motors 31 generate power simultaneously or alternately in reverse, and supply the power to the energy storage unit 40 through the dc bus and store the power.

Further preferably, the solar power generation assembly 41 is further included, and the solar power generation assembly 41 is connected to the energy storage unit 40 for storing the electric energy generated by the solar power generation assembly 41.

And the control system is used for controlling the motor 31 to rotate positively and negatively, converting between the upper stroke and the lower stroke of the oil pumping equipment, regulating stroke, stroke frequency, reversing, acceleration and the like, and can also collect oil well operation information at the same time. Wherein preferably a remote terminal unit RTU is provided for remotely monitoring the operation of the whole energy storage system.

The energy storage system is used for storing and providing electric energy, the underground rod column gravity drags the motor 31 to reversely rotate to generate electricity when the oil pumping equipment is in a down stroke, the electric energy is stored in the energy storage unit 40, the electric energy does not affect the electric network, the electric network can supplement the electric energy to the energy storage system at the same time, when the oil pumping equipment is in an up stroke, the energy storage system provides the electric energy to drive the motor 31 to rotate in a forward direction, the roller 11 is driven to rotate through the transmission mechanism, the flexible polished rod 13 is wound, and the underground rod pump is lifted to ascend at the same time, so that well liquid is pumped.

Example 3

This embodiment is substantially the same as embodiment 1 except that:

Referring to fig. 4, the driving device 30 in this embodiment includes a motor 31 and several intermediate transmission pairs 50, where the intermediate transmission pairs 50 are belt transmission pairs and/or chain transmission pairs. Preferably, the belt drive pair is a synchronous belt drive pair.

The intermediate transmission pairs 50 of several stages are connected in a head-to-tail transmission manner and are arranged between the motor 31 and the roller 11 for driving the roller 11 to rotate. Wherein, the base 10 is provided with one or a plurality of intermediate shafts 51 which are arranged at intervals in a relatively rotatable manner;

in the transmission direction from the motor 31 to the drum 11, the intermediate transmission pair 50 is provided between the motor 31 and the adjacent intermediate shaft 51, between the drum 11 and the adjacent intermediate shaft 51, and between the adjacent two intermediate shafts 51.

Wherein the intermediate shaft 51 is axially parallel to the power output shaft of the motor 31 and the drum 11.

The intermediate shaft 51 adjacent to the roller 11 is a first intermediate shaft 51a, the intermediate transmission pair 50 comprises a primary transmission pair 50a arranged between the first intermediate shaft 51a and the roller 11, the primary transmission pair 50a comprises 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, and the first driven wheel 54 is fixedly connected with the roller 11 in a coaxial mode.

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 through a first belt 53, or the first driving wheel 52 and the first driven wheel 54 are both chain wheels, and the first driving wheel 52 and the first driven wheel 54 are connected through a first chain (see the first belt 53).

Preferably, two sets of primary driving pairs 50a are symmetrically disposed on both sides of the drum 11 and both ends of the first intermediate shaft 51 a. Namely, two first driven wheels 54 are symmetrically disposed at both sides of the drum 11, and two first driving wheels 52 are symmetrically disposed at both ends of the first intermediate shaft 51 a.

Further, one or several stages of intermediate transmission pairs 50 are arranged between the first intermediate shaft 51a and the motor 31. Referring to fig. 4, the driving device 30 includes a two-stage intermediate transmission pair 50, and a one-stage intermediate transmission pair 50 is provided between the first intermediate shaft 51a and the motor 31. Referring to fig. 5, the driving device 30 includes a three-stage intermediate transmission pair 50, and a two-stage intermediate transmission pair 50 is disposed between the first intermediate shaft 51a and the motor 31, that is, two secondary transmission pairs 50b are disposed between the first intermediate shaft 51a and the motor 31.

The first intermediate shaft 51a is fixedly sleeved with an intermediate wheel 55, and the power output shaft of the motor 31 is fixedly sleeved with a driving wheel 56.

Referring to fig. 4, when the driving device 30 includes the two-stage intermediate transmission pair 50, the intermediate wheel 55 and the driving wheel 56 are both pulleys, the intermediate wheel 55 and the driving wheel 56 are connected by a belt, or the intermediate wheel 55 and the driving wheel 56 are both sprockets, and the intermediate wheel 55 and the driving wheel 56 are connected by a chain.

Referring to fig. 5, when the driving device 30 includes more than three intermediate transmission pairs 50, the base 10 is rotatably provided with one or several secondary intermediate shafts 51b between the first intermediate shaft 51a and the motor 31.

An intermediate transmission pair 50, i.e. a secondary transmission pair 50b, is arranged between the secondary intermediate shaft 51b and the electric motor 31, between the secondary intermediate shaft 51b and the first intermediate shaft 51a and/or between two adjacent secondary intermediate shafts 51 b. The secondary driving pair 50b may be provided in a manner referred to as the primary driving pair 50a or other belt or chain driving pair, and will not be described herein.

The utility model has simple and ingenious structure, small vibration, low noise, low maintenance cost, convenient popularization and wide adaptation.

Example 4

This embodiment is substantially the same as embodiment 1 except that:

Referring to fig. 6, in this embodiment, the bottom of the adjusting bracket 20 is pivotally disposed on the shaft seat 16 on the base 10 through the main shaft 14, and in the axial direction of the main shaft 14, the adjusting bracket 20 may be slidably disposed with respect to the shaft seat 16, that is, an adjusting space (adjusting gap) is disposed 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 polished rod 13, thereby centering the other end of the flexible polished rod 13 with the wellhead. In this embodiment, the adjusting bracket 20 is formed by two supporting frames symmetrically arranged in the left-right direction.

The embodiment further comprises an adjusting bolt 15, the adjusting bolt 15 is screwed into a threaded hole on the shaft seat 16, the top of the adjusting bolt 15 abuts against the adjusting bracket 20, and the adjusting bracket 20 is forced to move along the main shaft 14 by screwing in the adjusting bolt 15. Thereby realizing the centering adjustment of the other end of the flexible polished rod 13 and the wellhead.

Referring to fig. 6, the present embodiment includes two sets or two adjusting bolts 15 symmetrically disposed in the left-right direction for forcing the adjusting bracket 20 to move in the left-right direction along the main shaft 14. After all the adjusting bolts 15 which are symmetrically arranged left and right are screwed, the axial limiting effect on the adjusting bracket 20 can be achieved. In fig. 6, two adjusting bolts 15 are disposed outside two legs of the adjusting bracket 20, and in another embodiment, two adjusting bolts 15 are disposed inside two legs of the adjusting bracket 20, that is, between the two legs, and the heads of the adjusting bolts 15 are directed outwards.

Alternatively, an electric, pneumatic or hydraulic telescopic mechanism is used to replace the adjusting bolt 15, and the telescopic mechanism can force the adjusting bracket 20 to move left and right along the main shaft 14, so as to adjust the displacement of the guide wheel 12 and the other end of the flexible polished rod 13, and realize the centering of the other end of the flexible polished rod 13 and the wellhead.

Referring to fig. 7, the guide wheel 12 is rotatably disposed on the adjusting bracket 20 through a pulley shaft 17 and a bearing, a lubrication oil path 17a communicating with the bearing is disposed in the pulley shaft 17, the lubrication oil path 17a is provided with an oil inlet on an end surface of the pulley shaft 17, and a pressure oil cup 18 is disposed on the oil inlet.

Referring to fig. 8, a rope groove for limiting the flexible polish rod 13 is formed in the outer circle of the guide wheel 12, and a protection pad 19 is arranged in the rope groove and used for preventing the flexible polish rod 13 from directly rubbing against the guide wheel 12 and preventing the flexible polish rod 13 from being worn.

The protective pad 19 is preferably made of rubber (e.g., ethylene propylene diene monomer), plastic or resin material. The protection pad 19 is generally annular, and in cross section, the protection pad 19 is provided with a U-shaped annular groove for accommodating the flexible polish rod 13. The U-shaped ring groove can avoid contact and friction between the flexible polish rod 13 and the bottom surface and the side surface of the rope groove of the guide wheel 12. The protection pad is U-shaped structure, and the deformation that makes flexible polished rod produce when the winding of cylinder surface can resume, further improves the sealed reliability of well head.

The embodiment has more flexible structural design, is convenient for adjusting and centering, has low cost and is convenient for popularization and application.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims (16)

1. The oil pumping equipment is characterized by comprising a base, a roller, a guide wheel, an adjusting bracket, 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 is hung down after bypassing the guide wheel and is used for extending into a wellhead to be connected with an oil 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, and the other end of the telescopic mechanism is pivoted with the base and used for adjusting the distance that the other end of the flexible polish rod protrudes out of the base;

The pivot point of the other end of the telescopic mechanism and the base is arranged at the outer side of the adjusting bracket.

2. The oil extraction apparatus of claim 1, wherein the telescoping mechanism is an electric, pneumatic or hydraulic telescoping device.

3. The oil pumping apparatus of claim 1, wherein the telescoping mechanism is a manual telescoping mechanism comprising a screw and a threaded sleeve;

The screw rod is characterized in that two ends of the screw rod are respectively provided with a threaded section with opposite screw directions, and two threaded sleeves are respectively internally provided with internal threads matched with the two threaded sections;

Or two ends of the threaded sleeve are respectively provided with an internal thread section with opposite screw directions, two screws are respectively provided with external threads matched with the two internal thread sections, and the screws on two sides synchronously unscrew or screw into the two ends of the threaded sleeve by rotating the threaded sleeve, so that the extension or shortening is realized.

4. The oil pumping apparatus according to claim 1, wherein a spiral groove is provided on an outer circumference of the drum for discharging the rod.

5. The oil pumping equipment according to claim 1, wherein the driving device comprises a motor and an energy storage unit, the motor is connected with the energy storage unit, the motor is dragged to rotate reversely when the other end of the flexible polish rod is downward, the motor generates electricity, the energy storage unit is used for storing electric energy generated by the motor, and when the other end of the flexible polish rod is upward, the energy storage unit supplies power to the motor and is used for driving the motor to rotate positively, and the flexible polish rod is rolled up through a roller.

6. The oil pumping apparatus of claim 5, further comprising an inverter, wherein the energy storage unit is connected to the motor through the inverter;

The motor comprises an electromagnetic brake, wherein the electromagnetic brake is a normally closed brake and is arranged at the tail part of a motor shell and used for braking after the motor is stopped.

7. The oil pumping apparatus of claim 5, wherein the energy storage unit is a battery or a super capacitor.

8. The oil pumping apparatus of claim 5, wherein a plurality of motors of a plurality of the oil pumping apparatus are arranged in parallel and connected to the energy storage unit through a dc bus.

9. The oil pumping apparatus of claim 5, further comprising a solar power generation assembly coupled to the energy storage unit for storing electrical energy produced by the solar power generation assembly.

10. The oil pumping apparatus of claim 1, wherein the top of the adjustment bracket is provided with a cross shaft, and the guide wheel is adjustably mounted on the cross shaft along an axial position.

11. The oil pumping equipment according to claim 1, wherein the bottom of the adjusting bracket is arranged on a shaft seat on the base in a swinging way through a main shaft, and the adjusting bracket can be arranged in a sliding way relative to the shaft seat in the axial direction of the main shaft so as to be used for adjusting the displacement of the guide wheel and the other end of the flexible polished rod, so that the other end of the flexible polished rod is centered with a wellhead.

12. The oil pumping apparatus of claim 11, further comprising an adjusting bolt screwed into a threaded hole in the shaft seat, the top of the adjusting bolt abutting against the adjusting bracket, the adjusting bracket being forced to move along the main shaft by screwing in the adjusting bolt, thereby achieving centering adjustment of the other end of the flexible polish rod with the wellhead.

13. The oil pumping apparatus according to claim 12, comprising two groups or two adjusting bolts symmetrically arranged left and right for forcing the adjusting bracket to move in left and right directions along the main shaft, wherein the adjusting bolts symmetrically arranged left and right play a role in limiting the axial direction of the adjusting bracket after all the adjusting bolts are screwed.

14. The oil pumping equipment according to claim 1, wherein the guide wheel is rotatably arranged on the adjusting bracket through a pulley shaft and a bearing, a lubricating oil way communicated with the bearing is arranged in the pulley shaft, an oil inlet is arranged on the end face of the pulley shaft, and a pressure oil injection cup is arranged on the oil inlet.

15. The oil pumping equipment according to claim 1, wherein a rope groove for limiting the flexible polish rod is formed in the outer circle of the guide wheel, and a protection pad is arranged in the rope groove and used for preventing the flexible polish rod from directly rubbing against the guide wheel and preventing the flexible polish rod from being worn.

16. The oil pumping apparatus of claim 15, wherein the guard pad is generally annular in shape and has a U-shaped annular groove disposed thereon for receiving the flexible polish rod.