阅读说明：本技术 井内液压抽油机 (Hydraulic pumping unit in well ) 是由 高智 于 2021-06-09 设计创作，主要内容包括：本发明涉及一种井内液压抽油机,包括位移传感器电子仓、缸盖、液压油通道、缸盖压板、通气孔、原油出口、磁环、活塞、液压油连通口、连接环、传感器杆、油缸体、导向柱、油缸底盖、油杆接箍、油杆、油管接箍、抽油泵、套管、采油树、工艺油管、缸盖提环、液压油源。所述工艺油管钢制成,内径大于油缸外径并形成一个环形空间是采油通道。所述采油树是油井通向外界的接口,有阀门、安全系统等。所述位移传感器由电子仓、磁环、传感器杆组成,通过油缸位移传感器能准确调整抽油泵活塞在抽油泵中的运行位置冲程参数。井内液压抽油机带动杆式泵替代电潜泵,注蒸汽时不需要起出抽油泵,可以做到“注采一体化”,可用于海上丛式井、“寸土寸金”地区。(The invention relates to an in-well hydraulic pumping unit which comprises a displacement sensor electronic bin, a cylinder cover, a hydraulic oil channel, a cylinder cover pressing plate, a vent hole, a crude oil outlet, a magnetic ring, a piston, a hydraulic oil communicating port, a connecting ring, a sensor rod, an oil cylinder body, a guide post, an oil cylinder bottom cover, an oil rod coupling, an oil rod, an oil pipe coupling, an oil well pump, a sleeve, a production tree, a process oil pipe, a cylinder cover lifting ring and a hydraulic oil source. The process oil pipe is made of steel, the inner diameter of the process oil pipe is larger than the outer diameter of the oil cylinder, and an annular space is formed to be an oil extraction channel. The Christmas tree is an interface of an oil well to the outside and is provided with a valve, a safety system and the like. The displacement sensor consists of an electronic bin, a magnetic ring and a sensor rod, and the stroke parameter of the running position of the piston of the oil well pump in the oil well pump can be accurately adjusted through the oil cylinder displacement sensor. The hydraulic pumping unit in the well drives the rod pump to replace an electric submersible pump, the oil well pump does not need to be lifted out during steam injection, the injection and production integration can be realized, and the hydraulic pumping unit can be used in offshore cluster wells and regions with small soil and gold inches.)

1. An underground hydraulic pumping unit comprises a displacement sensor electronic bin, a cylinder cover, a hydraulic oil channel, a cylinder cover pressing plate, a pressing plate bolt, a vent hole, a crude oil outlet, a magnetic ring, a sealing ring, a piston, a hydraulic oil communicating port, a connecting ring, a sensor rod, an oil cylinder body, a guide post, an oil cylinder bottom cover, an oil rod coupling, an oil rod, an oil pipe coupling, an oil well pump assembly, a sleeve, a Christmas tree, a process oil pipe, a cylinder cover lifting ring and a hydraulic oil source assembly; the center of the steel top of the cylinder cover is provided with a sensor electronic bin, the cylinder cover is fastened with a conical surface contact pressure plate bolt of an oil cylinder sleeve body, and an oil cylinder sleeve flange is arranged on a process oil pipe flange; the process tubing is made of steel, an upper flange is connected with a Christmas tree, the inner diameter of the process tubing is larger than the outer diameter of the oil cylinder, an annular space is formed to be a production channel, the lower part of the process tubing is standard tubing size and is connected with the tubing and an oil pump through a tubing coupling, the Christmas tree is a component which is positioned at an opening leading to the top end of an oil well and comprises a valve for measurement and maintenance, a safety system and a series of monitoring instruments; the displacement sensor is composed of an electronic bin, a magnetic ring and a sensor rod, the motion position of the oil cylinder piston is directly and closely related to the working position of the oil well pump piston, and the running position and stroke parameters of the oil well pump piston in the oil well pump can be accurately adjusted by the oil cylinder displacement sensor.

Technical Field

The invention belongs to the field of oil field oil extraction machinery, and particularly relates to an in-well hydraulic pumping unit.

Background

At present, offshore oil production platform equipment at home and abroad is widely used as an electric submersible pump, which is a multistage centrifugal pump, 1800V high-voltage electric drive downhole motor is conveyed from the ground by an armored cable to rotate to drive a impeller to pump crude oil, and the offshore oil production platform equipment is characterized by high efficiency, simple ground equipment and suitability for small-area multi-well layout of the oil production platform.

Along with the development of oil fields, a large number of thick oil blocks need to be exploited for use, an electric submersible pump cannot normally work in the thick oil blocks, steam needs to be injected into an oil well to melt and dilute thick oil for exploitation, the electric submersible pump is not resistant to temperature, the pump needs to be taken out of a wellhead and then taken down after being cooled, the pump is taken down, the operation time and the cost are increased, an armored cable is frequently taken down and is easily damaged mechanically, a new oil exploitation process matching technology needs to be developed to meet the requirements of the oil well, ideally, the electric submersible pump is replaced by a rod pump which is a plunger type oil well pump commonly used for a land oil well, the rod type pump can resist the steam temperature, the electric submersible pump does not need to be taken out during steam injection, the injection and exploitation integration can be achieved, the exploitation efficiency is improved, and the operation time is saved. However, the oil production platform has limited area and narrow space, the cluster well spacing of the oil production platform is only 2000 mm × 1800 mm, the currently widely used beam pumping unit, the walking beam-free pumping unit cannot be installed on the oil production platform due to the floor area and height, and the oil production system is not suitable for the cluster wells of the offshore oil production platform.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an underground hydraulic pumping unit which has high reliability, simple structure, small volume, simple and convenient operation and maintenance, energy conservation and high efficiency. The technical scheme who solves its technical problem and adopt is a hydraulic pumping unit in well, includes: 1. the device comprises a displacement sensor electronic bin 2, a cylinder cover 3, a hydraulic oil channel 4, a cylinder cover pressing plate 5, a pressing plate bolt 6, a vent hole 7, a crude oil outlet 8, a magnetic ring 9, a sealing ring 10, a piston 11, a hydraulic oil communicating port 12, a connecting ring 13, a sensor rod 14, an oil cylinder body 15, a guide column 16, an oil cylinder bottom cover 17, an oil rod coupling 18, an oil rod 19, an oil pipe coupling 20, an oil well pump assembly 21, a sleeve 22, an oil production tree 23, a process oil pipe 24, a cylinder cover lifting ring 25 and a hydraulic oil source assembly. And a sensor electronic bin is arranged at the center of the steel top of the cylinder cover, and the cylinder cover is fastened with the conical surface contact pressure plate bolt of the cylinder sleeve body. The oil cylinder sleeve flange is installed on the process oil pipe flange, the process oil pipe is made of steel, the upper flange is connected with a Christmas tree, the inner diameter of the oil cylinder is larger than the outer diameter of the oil cylinder, an annular space is formed to be an oil extraction channel, the lower portion of the process oil pipe is of a standard oil pipe size and is connected with an oil pipe and an oil pump through an oil pipe coupling, the Christmas tree is a component located at an opening leading to the top end of an oil well and comprises a valve, a safety system and a series of monitoring instruments, the Christmas tree is connected with a production pipeline and an oil outlet pipe from the underground, is also an important barrier isolated from the external environment, and simultaneously bears the load of an oil sleeve hydraulic cylinder. The hydraulic oil source assembly comprises a motor, a main pump, an oil supplementing pump, a reversing valve, a safety valve, a one-way valve, an energy accumulator, a manifold, a controller and the like, the hydraulic oil source is a standard mature product, and the displacement and the pressure matched with the hydraulic system are selected according to the load, the stroke frequency and the like of the hydraulic pumping unit, so that the hydraulic oil source assembly is not repeated. The displacement sensor is composed of an electronic bin, a magnetic ring and a sensor rod, the motion position of the oil cylinder piston is directly and closely related to the working position of the oil well pump piston, and the running position and stroke parameters of the oil well pump piston in the oil well pump can be accurately adjusted by the oil cylinder displacement sensor.

The well hydraulic pumping unit has the characteristics of long stroke, large load and intellectualization, is not only favorable for reducing the dynamic load of the pumping rod, prolonging the service life of the pumping rod and improving the working efficiency of the pumping rod, but also can conveniently carry out stroke and stroke frequency adjustment.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic view of a hydraulic oil source according to the present invention.

In the figure: 1. the device comprises a displacement sensor electronic bin 2, a cylinder cover 3, a hydraulic oil channel 4, a cylinder cover pressing plate 5, a pressing plate bolt 6, a vent hole 7, a crude oil outlet 8, a magnetic ring 9, a sealing ring 10, a piston 11, a hydraulic oil communicating port 12, a connecting ring 13, a sensor rod 14, an oil cylinder body 15, a guide column 16, an oil cylinder bottom cover 17, an oil rod coupling 18, an oil rod 19, an oil pipe coupling 20, an oil well pump assembly 21, a sleeve 22, an oil production tree 23, a process oil pipe 24, a cylinder cover lifting ring 25 and a hydraulic oil source assembly.

Detailed Description

The invention is further explained by the following embodiments in combination with the attached drawings, and the invention provides a hydraulic pumping unit in a well, which comprises: the device comprises a displacement sensor electronic bin, a cylinder cover, a hydraulic oil channel, a cylinder cover pressing plate, a pressing plate bolt, a vent hole, a crude oil outlet, a magnetic ring, a sealing ring, a piston, a hydraulic oil communicating port, a connecting ring, a sensor rod, an oil cylinder body, a guide column, an oil cylinder bottom cover, an oil rod coupling, an oil rod, an oil pipe coupling, an oil well pump assembly, a sleeve, a Christmas tree, a process oil pipe, a cylinder cover lifting ring and a hydraulic oil source assembly. And a sensor electronic bin is arranged at the center of the steel top of the cylinder cover, and the cylinder cover is fastened with the conical surface contact pressure plate bolt of the cylinder sleeve body. The oil cylinder sleeve flange is installed on the process oil pipe flange, the process oil pipe is made of steel, the upper flange is connected with a Christmas tree, the inner diameter of the oil cylinder is larger than the outer diameter of the oil cylinder, an annular space is formed to be an oil extraction channel, the lower portion of the process oil pipe is of a standard oil pipe size and is connected with an oil pipe and an oil pump through an oil pipe coupling, the Christmas tree is a component located at an opening leading to the top end of an oil well and comprises a valve, a safety system and a series of monitoring instruments, the Christmas tree is connected with a production pipeline and an oil outlet pipe from the underground, is also an important barrier isolated from the external environment, and simultaneously bears the load of an oil sleeve hydraulic cylinder. The hydraulic oil source assembly comprises a motor, a main pump, an oil supplementing pump, a reversing valve, a safety valve, a one-way valve, an energy accumulator, a manifold, a controller and the like, the hydraulic oil source is a standard mature product, and the displacement and the pressure matched with the hydraulic system are selected according to the load, the stroke frequency and the like of the hydraulic pumping unit, so that the hydraulic oil source assembly is not repeated. The displacement sensor is composed of an electronic bin, a magnetic ring and a sensor rod, the motion position of the oil cylinder piston is directly and closely related to the working position of the oil well pump piston, and the running position and stroke parameters of the oil well pump piston in the oil well pump can be accurately adjusted by the oil cylinder displacement sensor.

The application method of the invention is briefly described as follows:

when the hydraulic pumping unit in the well works, the motor is controlled to drive the hydraulic pump to rotate through a control program in the control cabinet, hydraulic oil obtains kinetic energy and flows to the hydraulic cylinder through the pipeline reversing valve and pushes the piston to move upwards, the piston is connected with the oil rod to drive the oil pump to stroke and work, the piston reaches the top dead center and reverses the oil cylinder piston drives the oil pump to move downwards to the bottom dead center of the piston under the action of the gravity of the oil rod oil pump on the downstroke of the oil pump, then the oil pump supplies oil to the oil cylinder piston through the reversing valve, the oil cylinder piston moves upwards and works through the upstroke and work on the oil rod oil pump, and the reciprocating circulation is carried out to complete crude oil pumping. The top of the hydraulic cylinder piston is provided with a magnetic ring which is a permanent magnet, the center of the cylinder cover is provided with a displacement sensor rod, the sensor rod is a hollow rod, electronic elements are arranged in an electronic bin and the hollow rod and form another magnetic field, the magnetic ring moves along with the piston when the piston moves, the magnetic ring is not in contact with the sensor rod, the accurate position of an intersection point is calculated by utilizing pulse signals generated when the two different magnetic fields are intersected, and the running position and the stroke parameters of the oil well pump piston in the oil well pump can be accurately adjusted by the oil cylinder displacement sensor. The stroke and the stroke frequency can be adjusted on line during the operation of the oil pumping unit, so that the adjustment of the operation parameters of the oil pumping unit is very convenient and fast.