CN218760367U - Oil-well pump driven by linear motor - Google Patents
Oil-well pump driven by linear motor Download PDFInfo
- Publication number
- CN218760367U CN218760367U CN202222554826.5U CN202222554826U CN218760367U CN 218760367 U CN218760367 U CN 218760367U CN 202222554826 U CN202222554826 U CN 202222554826U CN 218760367 U CN218760367 U CN 218760367U
- Authority
- CN
- China
- Prior art keywords
- plunger
- oil
- linear motor
- oil outlet
- pump barrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
An oil-well pump driven by a linear motor, wherein a linear motor rotor and a linear motor stator form the linear motor, the lower part of an upper pump cylinder is connected with the upper thread of a pump cylinder coupling, the upper part of a lower pump cylinder is connected with the middle thread of the pump cylinder coupling, the lower thread of the pump cylinder coupling is connected with the upper part of a connecting pipe, the inner diameter of the upper pump cylinder is larger than that of the lower pump cylinder, the lower part of the connecting pipe is connected with the linear motor stator, an upper plunger, an oil outlet valve, an oil outlet joint, an oil inlet valve and a lower plunger are sequentially connected with the upper plunger, the oil outlet valve, the oil outlet joint and the oil inlet valve are placed in the upper pump cylinder, the upper plunger is matched and sealed with the upper pump cylinder, the lower plunger is matched and sealed with the lower pump cylinder, the lower part of the lower plunger is connected with the upper part of the linear motor rotor, the lower plunger can synchronously reciprocate with the linear motor rotor, well fluid can enter the lower plunger from a shaft, then flow upwards through the oil inlet valve and then enter the upper pump cylinder through the oil outlet valve and then be discharged onto the upper pump cylinder.
Description
Technical Field
The utility model relates to a device that oil field machinery oil recovery used is an oil-well pump that linear electric motor drove.
Background
In the pumping system with the rod pump, the pumping rod and the oil pipe move relatively in contact no matter in a vertical well or an inclined well, so that inevitable abrasion exists between the pumping rod and the oil pipe, particularly in a deep well and an inclined well, the pumping rod is easy to bend in the oil pipe, the problem that the pumping rod seriously abrades the oil pipe occurs, the oil pipe and the pumping rod cannot be used after abrasion occurs, oil well operation is caused, the maintenance-free period of an oil well is short, the operation cost is increased, the consumption of the rod pipe is increased, the production stop time of the oil well is long, and the yield of crude oil is reduced. In order to solve the problems, technicians develop various technologies for preventing abrasion between the sucker rod and the oil pipe, a more prominent technology for preventing abrasion between the sucker rod and the oil pipe is a rodless oil pump, and the technology is to put a motor underground to cancel the sucker rod, so that the problem of abrasion between the sucker rod and the oil pipe is fundamentally eliminated. One of the rodless oil-well pumps is a reciprocating oil-well pump driven by a linear motor. The oil well pump in the reciprocating oil well pump driven by the existing linear motor is a common oil well pump, and the oil well pump discharges oil upwards and feeds oil downwards, the linear motor outputs lifting well fluid upwards, and the lifting well fluid is idle during downwards moving, so that the working condition of the motor is poor, the energy consumption is high, and the operation is unbalanced. According to the problems of the oil pump driven by the existing linear motor, the technical personnel researches out a solution, for example, chinese patent 2005200854450 'Balanced type downhole linear motor oil pumping device' adopts a method of adding a balance weight under a downhole linear motor rotor, which is in principle right but difficult to implement because the inner diameter of an oil well is generally 124mm (most of sleeves are of the specification, and 5 mm 1 / 2 in casing), counterweight onlyThe counterweight can be made into a long and thin object, so that the counterweight is a longer rod body, in order to prevent the counterweight from falling off, an anti-falling pipe needs to be additionally arranged outside the counterweight, if the counterweight falls off, the counterweight can fall into the anti-falling pipe, and the counterweight can be lifted out during well repairing operation to prevent engineering accidents caused by falling to the bottom of a well. The upper part of the anti-falling pipe is connected with the lower part of the stator of the underground linear motor, so that the structure of the anti-falling pipe is more complicated. Since the weight of the balance weight reaches thousands of kg and its stroke is greater than 1m, if it starts to fall at the upper starting point, a great impact force will be generated, and therefore, even if the fall prevention pipe is provided, it is difficult to ensure that the fall prevention pipe will not be broken. Therefore, the above patent technologies have a problem of difficult implementation.
Disclosure of Invention
The utility model aims at designing an oil-well pump that linear electric motor drove to overcome the problem that the aforesaid exists, make its self produce decurrent hydraulic pressure force, reduce the motor power consumption, the operation is balanced, prevents the engineering occurence of failure, improves oil well economic benefits.
The purpose of the utility model is realized like this: the oil outlet valve and the oil inlet valve are one-way valves, well liquid can only flow upwards through the oil outlet valve and the oil inlet valve, but can not flow downwards through the oil inlet valve and the oil inlet valve, the upper plunger, the oil outlet valve, the lower plunger, the oil inlet valve, the oil outlet connector and the oil inlet valve are placed in the upper pump barrel, the upper plunger and the upper plunger are sealed in a matching manner, the lower plunger is placed in the lower pump barrel, the lower plunger and the oil inlet valve are sealed in a matching manner, the lower plunger and the oil outlet valve are sealed in a matching manner, the lower plunger and the lower plunger are opened, the plunger and the oil inlet valve are opened, the plunger and the oil outlet valve are opened, the plunger and the plunger enter the upper plunger and the oil outlet valve are opened, the plunger and the oil outlet valve are opened, and the plunger and the oil outlet valve are opened.
The outer diameter of the oil inlet valve is larger than the inner diameter of the lower pump barrel, and when the upper plunger and the lower plunger are positioned at the lower initial point, the upper end of the upper plunger is positioned on the sealing surface of the inner wall of the upper pump barrel.
The lower part of the connecting pipe is provided with an external communicating groove, the lower part of the lower plunger piston is provided with an internal communicating groove, so that well fluid can enter the lower plunger piston from a shaft, and the internal communicating groove is positioned below the lower end surface of the upper pump barrel when the lower plunger piston moves upwards to an initial point.
And a universal joint is arranged between the oil outlet joint and the oil inlet valve, and the swing angle of the universal joint is 3-5 degrees.
The oil outlet joint is provided with an upper connecting through hole, and the valve cover of the oil inlet valve is provided with a lower connecting through groove, so that the well fluid flows into the lower part of the oil outlet valve and the upper pump barrel through the lower connecting through groove and then flows onto the upper pump barrel through the upper connecting through hole.
The beneficial effects of the utility model are that: the pump diameter of the upper pump barrel is larger than that of the lower pump barrel, when the upper plunger and the lower plunger move downwards, the oil outlet valve is opened, the oil inlet valve is closed, the discharge pressure is arranged above the oil inlet valve, the sinking pressure is arranged below the oil inlet valve, the discharge pressure is larger than the sinking pressure, and the area of the upper plunger is larger than that of the lower plunger, so that the downward hydraulic pressure is generated, the effect of additionally arranging the balance weight under the linear motor rotor is achieved, the problem that the balance weight needs to be additionally arranged under the linear motor rotor in the 'balanced type downhole linear motor oil pumping device' in the Chinese patent 2005200854450 is solved under the condition of guaranteeing reduction of motor energy consumption and operation balance.
Drawings
Fig. 1 is an assembly view of the present invention.
In the figure: 1. the linear motor comprises an upper pump barrel, 2, an upper plunger, 3, an oil outlet valve, 4, an oil outlet joint, 5, a universal joint, 6, an oil inlet valve, 7, a pump barrel coupling, 8, a lower pump barrel, 9, a lower plunger, 10, a connecting pipe, 11-1, a linear motor rotor, 11-2 and a linear motor stator.
Detailed Description
As shown in figure 1, the embodiment of the invention comprises an upper pump barrel 1, an upper plunger 2, an oil outlet valve 3, an oil outlet joint 4, an oil inlet valve 6, a pump barrel coupling 7, a lower pump barrel 8, a lower plunger 9, a connecting pipe 10, a linear motor rotor 11-1 and a linear motor stator 11-2, wherein the linear motor rotor 11-1 is arranged in the linear motor stator 11-2, the linear motor rotor 11-1 and the linear motor stator 11-2 form a linear motor, the lower part of the upper pump barrel 1 is connected with an upper thread of the pump barrel coupling 7, the upper part of the lower pump barrel 8 is connected with a middle thread of the pump barrel coupling 7, a lower thread of the pump barrel coupling 7 is connected with the upper part of the connecting pipe 10, the inner diameter of the upper pump barrel 1 is larger than that of the lower pump barrel 8, the upper pump barrel 1 and the lower pump barrel 8 adopt standard pump barrels, the diameters of the pumps generally differ by two stages, if the upper pump barrel 1 is a \\/16256, the lower pump barrel is 16238, the lower part of the connecting pipe 10 is connected with the linear motor stator 11-2, the upper plunger 2, the plunger 3, the lower plunger 3 is connected with the lower plunger 6, the lower plunger 6 and the oil outlet valve 6, the plunger 6 is connected with the upper plunger 6, the linear motor rotor 6 can move synchronously, the plunger 6 and the lower plunger 6 can move upwards and the linear motor rotor, the plunger 6 can move synchronously, the oil outlet valve 9, the plunger 6 and the plunger 6 can move synchronously, the plunger 6 and the plunger 6, the plunger 6 can move upwards and the plunger 6,
the swing angle of the universal joint 5 is 3-5 degrees, and the universal joint 5 is used for preventing the problem that the upper plunger 2 is blocked in the upper pump barrel 1 and the lower plunger 9 is blocked in the lower pump barrel 8 due to the fact that parts are not coaxial after being assembled.
The external diameter of inlet valve 6 is greater than the internal diameter of lower pump barrel 8, makes it can fix a position (bump the pump) at the upper end of last pump barrel, and when going up plunger 2, lower plunger 9 and being in down the top, go up on 2 upper ends of plunger are in on 1 inner wall sealing face of last pump barrel, make it the utility model discloses during operation, go up 2 upper ends of plunger and be in all the time on the inner wall sealing face of last pump barrel 1, prevent the scale deposit of pump barrel inner wall, also can prevent that the grit from getting into in both clearances, prevent the card pump.
The lower part of the connecting pipe 10 is provided with an external communicating groove 10-1, and the lower part of the lower plunger piston 9 is provided with an internal communicating groove 10-2, so that well fluid can enter the lower plunger piston 9 from a well shaft. When the lower plunger 9 moves upwards to the upper starting point, the interconnecting groove 10-2 is positioned below the lower end surface of the upper pump barrel 1, so that the liquid can be fed in by the full stroke.
An upper connecting through hole 4-1 is arranged on the oil outlet connector 4, a lower connecting through groove 6-1 is arranged on a valve cover of the oil inlet valve 6, when the upper plunger 2 and the lower plunger 9 go upwards, the oil inlet valve 6 is opened, the oil outlet valve 3 is closed, well liquid can enter the lower plunger 9 from a shaft, then flows upwards through the oil inlet valve 6 and enters the upper pump barrel 1 below the oil outlet valve 3 from the lower connecting through groove 6-1, when the upper plunger 2 and the lower plunger 9 go downwards, the oil inlet valve 6 is closed, the oil outlet valve 3 is opened, and the well liquid entering the upper pump barrel 1 below the oil outlet valve 3 is discharged onto the upper pump barrel 1 through the upper connecting through hole 4-1 and the oil outlet valve 3 (if a universal joint is not installed, the upper connecting through hole 4-1 can be omitted, but a blocking and solving mechanism needs to be arranged in the valve cover of the oil inlet valve 6, like the oil inlet and outlet valve covers of common oil well pumps).
The pump diameter of the upper pump barrel 1 (the nominal diameter of the pump barrel is called as the pump diameter in the oil industry, namely the inner diameter of the pump barrel) is larger than that of the lower pump barrel 8, when the upper plunger 2 and the lower plunger 9 move upwards, the lower plunger 9 enters the upper pump barrel 1, the oil outlet valve 3 is closed, the volume of the upper pump barrel 1 below the upper plunger 2 is increased, the pressure is reduced, and well liquid enters a space reserved by the upper plunger 2. When the upper plunger 2 and the lower plunger 9 move downwards, the oil inlet valve 6 is closed, the volume of the upper pump barrel 1 below the upper plunger 2 is reduced, the pressure is increased, the oil outlet valve 3 is opened, and well liquid is discharged to an oil pipe on the pump.
When the upper plunger 2 and the lower plunger 9 move downwards, discharge pressure is arranged above the oil inlet valve 6, sinking pressure is arranged below the oil inlet valve 6, the discharge pressure is larger than the sinking pressure, and the area of the upper plunger 2 is larger than that of the lower plunger 9, so that downward hydraulic pressure is generated, and the effect of additionally arranging the balance weight under the rotor of the linear motor is achieved.
The embodiment of the present invention indicates that the well fluid enters from the external communicating groove at the lower part of the connecting pipe 10, which is only an entering channel, and if entering the pump from other channels, the present invention is also within the protection scope of the present invention.
The utility model discloses the theoretical discharge capacity of every stroke equals two pump barrel pump footpath area differences multiply stroke length. The utility model discloses downward hydraulic pressure power equals down the area of plunger multiply advance pump pressure and discharge pressure difference down when down.
Claims (6)
1. The utility model provides an oil-well pump that linear electric motor drove, characterized by: the linear motor comprises an upper pump cylinder (1), an upper plunger (2), an oil outlet valve (3), an oil outlet connector (4), an oil inlet valve (6), a pump cylinder coupling (7), a lower pump cylinder (8), a lower plunger (9), a connecting pipe (10), a linear motor rotor (11-1) and a linear motor stator (11-2), wherein the linear motor rotor (11-1) is arranged in the linear motor stator (11-2), and the linear motor rotor (11-1) and the linear motor stator (11-2) form a linear motor, and the linear motor is characterized in that: the lower part of an upper pump barrel (1) is connected with the upper thread of a pump barrel coupling (7), the upper part of a lower pump barrel (8) is connected with the middle thread of the pump barrel coupling (7), the lower thread of the pump barrel coupling (7) is connected with the upper part of a connecting pipe (10), the inner diameter of the upper pump barrel (1) is larger than that of the lower pump barrel (8), the lower part of the connecting pipe (10) is connected with a linear motor stator (11-2), an upper plunger (2), an oil outlet valve (3), an oil outlet joint (4), an oil inlet valve (6) and a lower plunger (9) are sequentially connected, the oil outlet valve (3) and the oil inlet valve (6) are one-way valves, well fluid can only flow upwards through the oil outlet valve (3) and the oil inlet valve (6) but not flow downwards through the oil outlet valve (3) and the oil inlet valve (6), the upper plunger (2), the oil outlet valve (3), the oil outlet joint (4) and the oil inlet valve (6) are placed in the upper pump barrel (1), the upper plunger (2) is matched with the upper pump barrel (1), the lower plunger (9) and the lower plunger (9) is sealed and is placed in the lower plunger (9) and can move synchronously with a lower plunger (11-motor rotor (11-11) and a linear motor rotor, when the upper plunger (2) and the lower plunger (9) move upwards, the oil inlet valve (6) is opened, the oil outlet valve (3) is closed, well liquid can enter the lower plunger (9) from a shaft, then flows upwards through the oil inlet valve (6) and enters the upper pump barrel (1) below the oil outlet valve (3), when the upper plunger (2) and the lower plunger (9) move downwards, the oil inlet valve (6) is closed, the oil outlet valve (3) is opened, and the well liquid entering the upper pump barrel (1) below the oil outlet valve (3) is discharged onto the upper pump barrel (1) through the oil outlet valve (3).
2. The linear motor driven oil well pump of claim 1, wherein: the outer diameter of the oil inlet valve (6) is larger than the inner diameter of the lower pump barrel (8).
3. The linear motor driven oil well pump of claim 1, wherein: when the upper plunger (2) and the lower plunger (9) are positioned at a lower initial point, the upper end of the upper plunger (2) is positioned on the sealing surface of the inner wall of the upper pump cylinder (1).
4. The linear motor driven oil well pump of claim 1, wherein: the lower part of the connecting pipe (10) is provided with an external communicating groove (10-1), the lower part of the lower plunger (9) is provided with an internal communicating groove (10-2), so that well fluid can enter the lower plunger (9) from a shaft, and the internal communicating groove (10-2) is positioned below the lower end surface of the upper pump barrel (1) when the lower plunger (9) moves upwards to an upper starting point.
5. The linear motor driven oil well pump of claim 1, wherein: a universal joint (5) is arranged between the oil outlet joint (4) and the oil inlet valve (6), and the swing angle of the universal joint (5) is 3-5 degrees.
6. The linear motor driven oil well pump of claim 1, wherein: an upper connecting through hole (4-1) is arranged on the oil outlet joint (4), a lower connecting through groove (6-1) is arranged on a valve cover of the oil inlet valve (6), so that well fluid flowing into the lower part of the oil outlet valve (3) and the upper pump barrel (1) through the lower connecting through groove (6-1) flows to the upper part of the upper pump barrel (1) through the upper connecting through hole (4-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222554826.5U CN218760367U (en) | 2022-09-27 | 2022-09-27 | Oil-well pump driven by linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222554826.5U CN218760367U (en) | 2022-09-27 | 2022-09-27 | Oil-well pump driven by linear motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218760367U true CN218760367U (en) | 2023-03-28 |
Family
ID=85697061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222554826.5U Active CN218760367U (en) | 2022-09-27 | 2022-09-27 | Oil-well pump driven by linear motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218760367U (en) |
-
2022
- 2022-09-27 CN CN202222554826.5U patent/CN218760367U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110939426B (en) | Centrifugal separation mechanism and co-well injection and production device using same | |
| CN104019019A (en) | Energy storage type linear motor capsule pump | |
| US2631541A (en) | Hydraulic pump | |
| CN100422556C (en) | Small displacement high lift reciprocating submersible electric pump | |
| CN218760367U (en) | Oil-well pump driven by linear motor | |
| CN207297303U (en) | One kind has bar lifting whole process to go out liquid oil well pump | |
| CN212583677U (en) | Hydraulic load-reducing oil pumping device | |
| CN212454380U (en) | Oil pumping device of electric screw pump capable of separately pumping and mixing out oil submersible oil | |
| CN218717401U (en) | Reciprocating type sucker-rod pump segmentation oil jack | |
| CN220434715U (en) | Hollow rod Relay type load-shedding deep drawing device | |
| CN111236897A (en) | Oil pumping device of electric screw pump capable of separately pumping and separating oil submersible | |
| CN115405506A (en) | Double-acting oil well pump driven by submersible reciprocating driving device | |
| RU217344U1 (en) | Plug-in design sucker rod pump | |
| CN220118293U (en) | Antiscaling feedback oil pump | |
| CN115711217A (en) | Reciprocating type sucker-rod pump segmentation oil jack | |
| CN219034962U (en) | Hollow sucker rod switching load-reducing deep pumping device | |
| CN213574028U (en) | Oil extraction device | |
| CN220204099U (en) | Reciprocating type sucker rod pump relay load shedding deep drawing device | |
| RU2342561C2 (en) | Tubing sucker-rod pump with shortened barrel and plunger | |
| CN117108492A (en) | Continuous flow oil-submersible plunger pump | |
| CN210715040U (en) | Novel hydraulic drive oil-well pump | |
| CN210265086U (en) | Anti-spraying oil well pump device | |
| CN2883728Y (en) | Dual-action link type pump tube free oil-well pump | |
| CN210290093U (en) | Sand-proof oil-well pump with super-long plunger and short pump barrel | |
| CN212296324U (en) | Oil pumping device of electric screw pump capable of separately pumping and separating oil submersible |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |