CN113803241B - Rodless oil extraction system of series submersible linear motor - Google Patents
Rodless oil extraction system of series submersible linear motor Download PDFInfo
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- CN113803241B CN113803241B CN202010550760.5A CN202010550760A CN113803241B CN 113803241 B CN113803241 B CN 113803241B CN 202010550760 A CN202010550760 A CN 202010550760A CN 113803241 B CN113803241 B CN 113803241B
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- pump cylinder
- cylinder assembly
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- 238000000605 extraction Methods 0.000 title abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 230000035515 penetration Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 63
- 238000005086 pumping Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application provides a rodless oil extraction system of a series submersible linear motor. A tandem submersible linear motor rodless oil recovery system comprising: the plurality of motors are arranged in series along the vertical direction and comprise a stator part and a rotor part; the push rod is arranged at the top ends of the motors, and is connected with a rotor part of the motor positioned at the top end in the motors; the pump cylinder assembly is sleeved outside the push rod and is connected with a stator part of a motor positioned at the top end of the plurality of motors; the plunger assembly is arranged in the pump cylinder assembly and is connected with one end of the push rod, which is far away from the motor; the oil pipe is connected with one end of the pump cylinder assembly, which is far away from the motor; and the power cable is electrically connected with the plurality of motors. The application solves the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the depth of penetration.
Description
Technical Field
The application relates to the field of petroleum exploitation equipment, in particular to a rodless oil exploitation system of a series submersible linear motor.
Background
In recent years, the electric submersible plunger pump lifting technology is gradually increased in the application scale of oil fields, and the working principle is that the reciprocating linear motion of a linear motor rotor drives the plunger of the oil pump to move, so that crude oil lifting is realized. Compared with the traditional walking beam type rod pump, the walking beam type rod pump has the following advantages: firstly, the energy transmission link of the middle sucker rod is reduced, the energy consumption is greatly reduced, and the problems of eccentric wear of the pipe rod and disconnection of the sucker rod are thoroughly avoided; secondly, production parameters are adjusted through the ground intelligent control cabinet, so that the optimization operation of the oil extraction system is easy to realize; thirdly, the packing box of the oil pumping well does not exist at the wellhead, so that the problem of oil leakage at the sealing position of the wellhead and the rod column is thoroughly avoided, and the strict environmental protection requirement of the petroleum exploitation industry is met. At present, the linear motor which is applied to the field has various specifications, and the technical requirements of the oilfield field are met to a certain extent.
The electric submerged plunger pump is a device which integrates a power device and an oil pump, can realize on-line random parameter adjustment, saves an on-well oil pumping unit and an oil pumping rod, reduces the installation operation time and the cost and reduces the energy consumption.
From the structure, the submersible linear motor is composed of a rotor, a stator and a casing from inside to outside in sequence. The stator of the linear motor is provided with a plurality of processed groove-shaped circular rings, circular ring-shaped coils are arranged in the grooves, a rotor of the linear motor usually adopts a steel pipe, and the surface of the steel pipe is covered with a layer of copper sheet or aluminum sheet composite with the thickness of 1-2 mm. After the three-phase alternating current is fed into the linear motor, the coils on the stator generate an air gap magnetic field, the magnetic field is in sine distribution, when the three-phase current changes along time, the air gap magnetic field moves along the phase sequence of the three-phase alternating current in a linear mode, and the magnetic field is a translational mode and is called a travelling wave magnetic field. When the mover is cut by the travelling wave magnetic field, induced electromotive force and current are generated, the magnetic field formed by the mover current interacts with the air gap magnetic field to generate electromagnetic thrust, and at the moment, the linear motor stator is fixed, and the linear motor mover moves linearly along the travelling wave magnetic field movement direction. Because the linear motor works underground, the motor is always in high-temperature and high-pressure oil-gas-water, strict requirements are imposed on pressure bearing and sealing of the linear motor, and in addition, deep well small hole lifting has higher requirements on lifting force and outer diameter of the motor, and the linear motor is required to have larger thrust and smaller outer diameter
To reduce the cost of drilling and completion, the development of low-permeability blocks with deeper burial in China mainly adopts 5in (inner diameter) And 51/2in (inner diameter +.>) Is used for completing the casing well. Aiming at the deep well lifting problem of a 51/2in sleeve, the Xinjiang oil field is firstly researched and tested in China to form a WFQYDB-114-1140- (30-50) linear motor matching with the sleeveThe deep pumping technology of the oil pump meets the production requirements that the depth of the lower pump is less than or equal to 3500m and the discharge capacity is less than or equal to 10m < 3 >/d. However, for reservoirs with pump depth requirements under the depths of 4000m and 4500m, the thrust of the conventional linear motor cannot meet the deep requirements.
At present, the main outer diameter capable of meeting the lifting requirement of a deep well isThrust 35kN and outer diameter->A linear motor with a thrust of 60 kN. Xinjiang oil field has been subjected to an outer diameter +.>The deep pumping test of the 35kN thrust linear motor meets the lifting technical requirement of the oil well with the pump hanging within 3500 m. However, the linear motor which further deepens the pump hanger in the small-size sleeve and meets the lifting depth of 3500m-5000m mainly has lifting force failureThe problem that the steel body has too large outer diameter and can not be put into a casing pipe below 51/2in can be solved, and the application of the technology in small casing pipe deep pumping well is hindered. Therefore, a new small-diameter large-thrust linear motor capable of adapting to the production requirement of a 51/2in small sleeve is required to be designed so as to expand the application range of the technology.
Therefore, the problem that the thrust of the submersible linear motor cannot meet the requirement of the running depth exists in the prior art.
Disclosure of Invention
The application mainly aims to provide a rodless oil extraction system of a series submersible linear motor, which is used for solving the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the running depth.
To achieve the above object, according to one aspect of the present application, there is provided a tandem submersible linear motor rodless oil recovery system, comprising: the plurality of motors are arranged in series along the vertical direction and comprise a stator part and a rotor part; the push rod is arranged at the top ends of the motors, and is connected with a rotor part of the motor positioned at the top end in the motors; the pump cylinder assembly is sleeved outside the push rod and is connected with a stator part of a motor positioned at the top end of the plurality of motors; the plunger assembly is arranged in the pump cylinder assembly and is connected with one end of the push rod, which is far away from the motor; the oil pipe is connected with one end of the pump cylinder assembly, which is far away from the motor; and the power cable is electrically connected with the plurality of motors.
Further, the power cable extends from the motor towards the oil pipe, and the power cable is fixedly connected with the outer side wall of the pump cylinder assembly and the outer side wall of the oil pipe respectively.
Further, the rodless oil extraction system of the series submersible linear motor further comprises a first fixing piece and a second fixing piece, at least one part of the power cable is fixed on the outer side wall of one end, far away from the motor, of the oil pipe through the first fixing piece, and at least one other part of the power cable is fixed on the outer side wall of one end, close to the motor, of the oil pipe through the second fixing piece.
Further, the pump cylinder assembly is coaxially disposed with the stator portions of the plurality of motors.
Further, the plunger assembly is coaxially disposed with the mover portions of the plurality of motors.
Further, the rodless oil extraction system with the series submersible linear motor further comprises a screen pipe, the screen pipe is arranged between the motors of the pump cylinder assembly, and the pump cylinder assembly is connected with the stator part through the screen pipe.
Further, the rodless oil extraction system of the series submersible linear motor further comprises a sleeve, and the motor, the pump cylinder assembly, the plunger assembly, the oil pipe and the power cable are all arranged inside the sleeve.
Further, the outer side wall of the sleeve near one end of the motor is provided with an eyelet.
Further, the sleeve is coaxially disposed with the tubing.
Further, the rodless oil extraction system of the series submersible linear motor further comprises a plurality of connecting wires, and the plurality of motors are electrically connected through the connecting wires.
By applying the technical scheme of the application, the rodless oil extraction system of the series submersible linear motor comprises a motor, a push rod, a pump cylinder assembly, a plunger assembly, an oil pipe and a power cable. The plurality of motors are arranged in series along the vertical direction, and the motors comprise a stator part and a rotor part; the push rod is arranged at the top ends of the motors, and is connected with a rotor part of the motor positioned at the top end in the motors; the pump cylinder assembly is arranged outside the push rod in a sleeved mode and is connected with a stator part of a motor positioned at the top end of the plurality of motors; the plunger assembly is arranged in the pump cylinder assembly and is connected with one end of the push rod, which is far away from the motor; the oil pipe is connected with one end of the pump cylinder assembly, which is far away from the motor; the power cable is electrically connected with the plurality of motors.
When the series submersible linear motor rodless oil extraction system with the structure is used, as the motors are multiple and are arranged in series along the vertical direction, the length of the motor can be increased without increasing the diameter of the motor, and thus the thrust of the motor is improved. Therefore, the rodless oil extraction system of the series submersible linear motor can effectively meet the requirement of oil field production with deeper pump-down depth. Therefore, the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the depth of penetration is effectively solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic diagram of a tandem submersible linear motor rodless oil recovery system in accordance with one embodiment of the application; and
fig. 2 shows a schematic diagram of the connection between two adjacent motors of a tandem submersible linear motor rodless oil recovery system of the present application.
Wherein the above figures include the following reference numerals:
10. a motor; 11. a stator portion; 12. a mover section; 20. a push rod; 30. a pump cylinder assembly; 40. a plunger assembly; 50. an oil pipe; 60. a power cable; 70. a screen pipe; 80. a sleeve; 81. an eyelet; 90. and (5) connecting wires.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present application, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present application.
The application provides a rodless oil extraction system of a series submersible linear motor, which aims to solve the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the depth of penetration.
As shown in fig. 1 and 2, the tandem submersible linear motor rodless oil recovery system of the present application includes a motor 10, a push rod 20, a pump cylinder assembly 30, a plunger assembly 40, an oil pipe 50, and a power cable 60. The number of the motors 10 is plural, the plural motors 10 are arranged in series in the vertical direction, and the motor 10 includes a stator portion 11 and a mover portion 12; the push rod 20 is provided at the top ends of the plurality of motors 10, and the push rod 20 is connected with the mover portion 12 of the motor 10 located at the top end among the plurality of motors 10; the pump cylinder assembly 30 is sleeved outside the push rod 20, and the pump cylinder assembly 30 is connected with the stator part 11 of the motor 10 positioned at the top end of the plurality of motors 10; the plunger assembly 40 is arranged in the pump cylinder assembly 30, and the plunger assembly 40 is connected with one end of the push rod 20 far away from the motor 10; the oil pipe 50 is connected with one end of the pump cylinder assembly 30 far away from the motor 10; the power cable 60 is electrically connected to the plurality of motors 10.
When the series submersible linear motor rodless oil extraction system with the structure is used, as a plurality of motors 10 are arranged in series along the vertical direction, the length of the motor 10 can be increased without increasing the diameter of the motor 10, and the thrust of the motor 10 is improved. Therefore, the rodless oil extraction system of the series submersible linear motor can effectively meet the requirement of oil field production with deeper pump-down depth. Therefore, the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the depth of penetration is effectively solved.
Also, it should be noted that well servicing can also be facilitated by providing a plurality of motors 10 in series.
Specifically, the power cable 60 extends from the motor 10 toward the oil pipe 50, and the power cable 60 is fixedly connected to the outer side wall of the pump cylinder assembly 30 and the outer side wall of the oil pipe 50, respectively. Through the arrangement, the power cable 60 can be effectively fixed, so that the stability of connection between the power cable 60 and the motor 10 can be effectively ensured, and the normal operation of the rodless oil extraction system of the series submersible linear motor can be effectively ensured.
In the present application, when the power cable 60 is energized, the mover portion 12 of the motor 10 moves up and down inside the stator portion 11 and pushes the plunger assembly 40 to move up and down inside the pump barrel assembly 30, the traveling valve on the plunger assembly 40 is opened, the fixed valve on the pump barrel assembly 30 is closed, the oil flow enters the pumping chamber formed by the plunger assembly 40 and the pump barrel assembly 30, the traveling valve on the plunger assembly 40 is closed, the fixed valve on the pump barrel assembly 30 is opened, the oil flow in the pumping chamber formed by the plunger assembly 40 and the pump barrel assembly 30 completes a stroke through the fixed valve on the pump barrel assembly 30 entering the oil pipe 50, and the bottom hole oil flow is lifted to the ground through the oil pipe 50 by continuous cyclic reciprocating movement.
In one embodiment of the application, which is not shown, the tandem submersible linear motor rodless oil recovery system further includes a first fixture and a second fixture, at least one portion of the power cable 60 is fixed to the outer side wall of the oil pipe 50 at the end far from the motor 10 by the first fixture, and at least another portion of the power cable 60 is fixed to the outer side wall of the oil pipe 50 at the end near to the motor 10 by the second fixture. By this arrangement, the power cable 60 can be further effectively fixed.
Specifically, the pump cylinder assembly 30 is disposed coaxially with the stator portions 11 of the plurality of motors 10.
Specifically, the plunger assembly 40 is disposed coaxially with the mover sections 12 of the plurality of motors 10.
By the arrangement, the whole rodless oil extraction system with the series submersible linear motor can be effectively ensured not to deviate and reduce abrasion in the operation process.
Optionally, the tandem submersible linear motor rodless oil recovery system further includes a screen 70, the screen 70 being disposed between the motors 10 of the pump cylinder assembly 30, and the pump cylinder assembly 30 being connected to the stator portion 11 of the motors 10 by the screen 70.
Specifically, the tandem submersible linear motor rodless oil recovery system further includes a casing 80, and the motor 10, the pump barrel assembly 30, the plunger assembly 40, the oil pipe 50, and the power cable 60 are all disposed inside the casing 80. The outer side wall of the sleeve 80 near one end of the motor 10 has an eyelet 81.
In the present application, the tubing 50 serves as an oil flow passage, the casing serves as a wellbore protection passage, and formation oil flows into the casing through casing perforations 81. The tubing 50 is connected to the upper portion of the pump cylinder assembly 30. The lower portion of the pump cylinder assembly 30 is connected to the upper portion of the screen 70.
In one embodiment of the present application, the sleeve 80 is disposed coaxially with the tubing 50.
Specifically, the rodless oil recovery system with the series submersible linear motor further comprises a plurality of connecting wires 90, and the plurality of motors 10 are electrically connected through the connecting wires 90. By this arrangement, the connection stability between the plurality of motors 10 can be effectively ensured.
It should be further noted that, in one embodiment of the present application, in order to improve the pressure resistance of the oil pump, the pump leakage during the oil pumping process is reduced, the length of the sealing section of the oil pump is increased, the length of the plunger assembly 40 and the pump barrel assembly 30 is increased by 600mm compared with the length of the conventional oil pump.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
1. the problem that the thrust of the submersible linear motor in the prior art cannot meet the requirement of the depth of penetration is effectively solved;
2. the performance is stable;
3. the structure is simple.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A tandem submersible linear motor rodless oil recovery system, comprising:
the motor (10) is a plurality of motors (10), the motors (10) are arranged in series along the vertical direction, and the motor (10) comprises a stator part (11) and a rotor part (12);
-a push rod (20), said push rod (20) being arranged at the top end of a plurality of said motors (10), and said push rod (20) being connected to a mover portion (12) of said motor (10) at the top end of a plurality of said motors (10);
the pump cylinder assembly (30) is sleeved outside the push rod (20), and the pump cylinder assembly (30) is connected with a stator part (11) of the motor (10) positioned at the top end of the plurality of motors (10);
the plunger assembly (40) is arranged inside the pump cylinder assembly (30), and the plunger assembly (40) is connected with one end, far away from the motor (10), of the push rod (20);
the oil pipe (50) is connected with one end, far away from the motor (10), of the pump cylinder assembly (30);
-a power cable (60), said power cable (60) being electrically connected to a plurality of said motors (10);
the pump cylinder assembly (30) is coaxially arranged with the stator parts (11) of the plurality of motors (10);
the plunger assembly (40) is coaxially arranged with the mover sections (12) of the plurality of motors (10).
2. The submersible linear motor rodless oil recovery system according to claim 1, characterized in that the power cable (60) extends from the motor (10) towards the oil pipe (50), and the power cable (60) is fixedly connected with the outer side wall of the pump cylinder assembly (30) and the outer side wall of the oil pipe (50), respectively.
3. The submersible linear motor rodless oil recovery system of claim 2, further comprising a first fastener and a second fastener, wherein at least a portion of the power cable (60) is secured to an outer sidewall of the oil pipe (50) distal from the end of the motor (10) by the first fastener, and at least another portion of the power cable (60) is secured to an outer sidewall of the oil pipe (50) proximal to the end of the motor (10) by the second fastener.
4. A tandem submersible linear motor rodless oil recovery system according to any one of claims 1 to 3, characterized in that it also incorporates a screen (70), the screen (70) being arranged between the motors (10) of the pump cylinder assembly (30), and the pump cylinder assembly (30) being connected with the stator part (11) through the screen (70).
5. A tandem submersible linear motor rodless oil recovery system according to any one of claims 1 to 3, characterized in that it further comprises a casing (80), the motor (10), the pump barrel assembly (30), the plunger assembly (40), the oil pipe (50) and the power cable (60) being all arranged inside the casing (80).
6. The submersible linear motor rodless oil recovery system of claim 5, characterized in that the outer sidewall of the casing (80) near one end of the motor (10) has perforations (81).
7. The submersible linear motor rodless oil recovery system of claim 5, characterized in that the casing (80) is arranged coaxially with the oil pipe (50).
8. A tandem submersible linear motor rodless oil recovery system according to any one of claims 1 to 3, characterized in that it further comprises a plurality of connection lines (90), between which a plurality of the motors (10) are electrically connected by means of the connection lines (90).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550760.5A CN113803241B (en) | 2020-06-16 | 2020-06-16 | Rodless oil extraction system of series submersible linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550760.5A CN113803241B (en) | 2020-06-16 | 2020-06-16 | Rodless oil extraction system of series submersible linear motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113803241A CN113803241A (en) | 2021-12-17 |
| CN113803241B true CN113803241B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010550760.5A Active CN113803241B (en) | 2020-06-16 | 2020-06-16 | Rodless oil extraction system of series submersible linear motor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2555422Y (en) * | 2002-07-16 | 2003-06-11 | 姜树文 | Electric oil submerged plunger pump |
| CN101008380A (en) * | 2007-01-10 | 2007-08-01 | 大庆油田有限责任公司 | Lifting device of electric submersible piston pump in horizontal wells |
| CN204243985U (en) * | 2014-10-20 | 2015-04-01 | 沈阳新城石油机械制造有限公司 | Oil immersion line motor lead-out wire extending structure and transport fixture |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201320248D0 (en) * | 2013-11-15 | 2014-01-01 | Coreteq Ltd | Line start permanent magnet motor |
-
2020
- 2020-06-16 CN CN202010550760.5A patent/CN113803241B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2555422Y (en) * | 2002-07-16 | 2003-06-11 | 姜树文 | Electric oil submerged plunger pump |
| CN101008380A (en) * | 2007-01-10 | 2007-08-01 | 大庆油田有限责任公司 | Lifting device of electric submersible piston pump in horizontal wells |
| CN204243985U (en) * | 2014-10-20 | 2015-04-01 | 沈阳新城石油机械制造有限公司 | Oil immersion line motor lead-out wire extending structure and transport fixture |
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| Publication number | Publication date |
|---|---|
| CN113803241A (en) | 2021-12-17 |
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