CN220769435U

CN220769435U - Pumping unit

Info

Publication number: CN220769435U
Application number: CN202322250973.8U
Authority: CN
Inventors: 徐超
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-13
Filing date: 2023-08-13
Publication date: 2024-04-12
Anticipated expiration: 2033-08-13

Abstract

The application belongs to the technical field of petroleum oilfield operation devices, and particularly relates to an oil pumping unit, the oil pumping unit comprises a base, a large frame, a rear support, a motor, a speed reducer, a crank, a lower connecting rod, a rocker, an upper connecting rod, a walking beam, a horsehead and a balancing weight. The big frame is fixed in the base with the rear bracket, and the motor is connected the speed reducer and is installed in the rear bracket, and the speed reducer passes through the crank and connects the lower connecting rod, and the rocker middle part is connected to the lower connecting rod, and the rear bracket is connected to the rocker lower part, and connecting rod lower part is connected on the rocker upper portion, and the walking beam rear portion is connected on upper connecting rod upper portion, and the big frame top is articulated in the walking beam middle part, and walking beam front portion fixed connection horse head, horse head flexible connection well head load, balanced heavy is still connected at the walking beam rear portion. The beneficial effects of the application are that: compared with a crank balance beam pumping unit, the utility model has the advantages of simple structure, shortened crank length, reduced stress of the crank and the connecting rod, reduced installed power, effectively reduced electric energy loss and obvious electricity-saving effect.

Description

Pumping unit

Technical Field

The present application relates to a device for oil extraction downhole in petroleum fields.

Background

The existing main oil pumping unit in the oil field is a crank balance beam pumping unit, and the pumping unit has the problems of high energy consumption, high balance adjustment difficulty, complex operation procedures and the like. In particular, as more and more low-yield wells of the oil field are developed, the low-yield wells adopt a conventional crank balance beam pumping unit lifting process, and besides the problems, the low effective load rate and difficulty in adapting to the artificial lifting requirements of large-scale low-yield wells exist.

Disclosure of Invention

The purpose of the application is to solve the problems of high energy consumption, high adjustment balance difficulty, complex operation procedure and low effective load rate of the conventional crank beam pumping unit lifting process, and provide the pumping unit.

The above object is achieved by the following technical scheme:

the pumping unit comprises a base, a big frame, a rear bracket, a motor, a speed reducer, a crank, a lower connecting rod, a rocker, an upper connecting rod, a walking beam, a horsehead and a balancing weight.

The big frame is fixed in the base with the rear bracket, and the motor is connected with the speed reducer and is installed on the rear bracket, and speed reducer shaft connection crank one end, the crank other end hinge lower connecting rod one end, and the lower connecting rod other end hinge rocker middle part, rocker lower part hinge rear bracket, rocker upper portion hinge upper connecting rod lower part, upper connecting rod upper portion hinge walking beam rear portion, walking beam middle part hinge big frame top, walking beam front portion fixed connection horse head, horse head flexonics underground load, and the balancing weight is still connected to the walking beam rear portion.

The technical scheme of the application has the following beneficial effects:

the crank is driven to rotate by the motor, circular motion of the crank is converted into multiple-stroke reciprocating linear motion of a wellhead through the crank connecting rod rocker mechanism, the crank rotation stroke is subjected to twice stroke increasing, namely the stroke increasing of the connecting rod rocker and the stroke increasing of the walking beam, the length of the crank is shortened under the same condition of stroke increasing of the walking beam, the multiple-stroke structural design of the wellhead stroke is met by short crank rotation, the existing crank balance walking beam pumping unit only has one stroke increasing of the walking beam, and the crank load is larger, so that the crank is longer and heavier, and the crank is two-phase compared.

The crank balance of the conventional pumping unit is canceled, the balance beam is adopted, the balance effect of the balance weight is enhanced, the load of the balance beam is effectively balanced, the stress of the crank and the connecting rod is reduced, the net torque peak value on the crank shaft is reduced, the installed power is reduced, the electric energy loss is effectively reduced, and the electricity-saving effect is obvious. Especially for low-yield wells, the energy-saving effect is obvious, and the popularization and application prospect is wide.

Drawings

The drawings of the embodiments of the present application illustrate only certain embodiments of the present application and therefore should not be considered limiting of the scope.

Fig. 1 is a schematic diagram of an oil pumping unit according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a crank balance beam pumping unit, which is the main pumping unit in service in the current oil field.

Detailed Description

Fig. 1 is a schematic structural diagram of an oil pumping unit according to an embodiment of the present application. As shown in fig. 1, includes: base 1, big frame 2, rear bracket 3, motor 4, speed reducer 5, crank 6, lower connecting rod 7, rocker 8, upper connecting rod 9, walking beam 10, horse head 11, balanced heavy 12. Wherein, big frame 2 is fixed in base 1 with back support 3, motor 4 connects speed reducer 5 to install on back support 3, the hub connection crank 6 one end of speed reducer 5, the crank 6 other end articulates lower connecting rod 7 one end, the lower connecting rod 7 other end articulates rocker 8 middle part, rocker 8 lower part articulates back support 3, rocker 8 upper portion articulates connecting rod 9 lower part, go up connecting rod 9 upper portion articulated walking beam 10 rear portion, walking beam 10 middle part articulates big frame 2 top, walking beam 10 front portion fixed connection horse head 11, the horse head 11 connects the well head load, balanced heavy 12 is still connected to walking beam 10 rear portion, balanced heavy position and weight are all adjustable.

The motor 4 drives the speed reducer 5 to rotate, drives the crank 6 to do circular operation, the crank 6 drives the rocker 8 to swing back and forth around the lower part of the rocker through the lower connecting rod 7, the rocker 8 drives the walking beam 10 and the horsehead 11 to swing up and down around the middle part of the walking beam 10 through the upper connecting rod 9, and the horsehead 11 is flexibly connected with a wellhead load, and the wellhead load reciprocates up and down. The balance weight 12 at the rear part of the walking beam 10 directly balances the furnace end 11 and the wellhead load through the walking beam 10, and the balance effect is direct and efficient, and the acting arm of force of the balance weight can be longer.

The crank balance beam pumping unit shown in FIG. 2 comprises a base 2-1, a bracket 2-2, a motor 2-3, a belt 2-4, a speed reducer 2-5, a crank 2-6, a counterweight 2-7, a connecting rod 2-8, a beam 2-9 and a horsehead 2-10. In fig. 2, the balance of the crank is that the stress of the crank 2-6 and the connecting rod 2-8 is increased relative to the balance of the walking beam due to the influence of the balance weight 2-7.

Claims

1. An oil pumping unit, its structure includes: comprises a base, a big frame, a rear bracket, a motor, a speed reducer, a crank, a lower connecting rod, a rocker, an upper connecting rod, a walking beam, a horsehead and a balancing weight; wherein: the big frame and the rear support are fixed on the base, the motor is connected with the speed reducer, the speed reducer is connected with the lower connecting rod through a crank, the lower connecting rod is connected with the middle part of the rocker, the lower part of the rocker is connected with the rear support, the upper part of the rocker is connected with the lower part of the upper connecting rod, the upper part of the upper connecting rod is connected with the rear part of the walking beam, the middle part of the walking beam is hinged with the top end of the big frame, the front part of the walking beam is fixedly connected with the horsehead, the horsehead is flexibly connected with a wellhead load, and the rear part of the walking beam is also connected with a balancing weight;

the method is characterized in that: and a crank-link rocker mechanism is adopted.