CN116412112A - Submersible electric drive oil pump - Google Patents

Submersible electric drive oil pump Download PDF

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Publication number
CN116412112A
CN116412112A CN202310375019.3A CN202310375019A CN116412112A CN 116412112 A CN116412112 A CN 116412112A CN 202310375019 A CN202310375019 A CN 202310375019A CN 116412112 A CN116412112 A CN 116412112A
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China
Prior art keywords
push rod
feeding amount
oil
oil output
control module
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Granted
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CN202310375019.3A
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Chinese (zh)
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CN116412112B (en
Inventor
邹淑君
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Daqing Holly Technology Development Co ltd
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Daqing Holly Technology Development Co ltd
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    • 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
    • F04B47/12—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having free plunger lifting the fluid to the surface
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment

Abstract

The invention relates to the technical field of oil and coalbed methane liquid discharge exploitation devices, in particular to an oil-submersible electric drive oil pump which comprises an oil pump assembly, a push rod assembly, a power assembly, a monitoring module and a central control module, wherein the oil pump assembly, the push rod assembly and the power assembly are coaxially and sequentially arranged from top to bottom, and the central control module is respectively connected with an oil-submersible motor in the monitoring module and the power assembly.

Description

Submersible electric drive oil pump
Technical Field
The invention relates to the technical field of petroleum and coalbed methane liquid discharge exploitation devices, in particular to an electric oil-submersible driving oil well pump.
Background
In the process of oil and coalbed methane liquid extraction, the oil-well pump is a necessary oil extraction and liquid extraction tool, the existing submersible motor oil-well pump generally adopts a stator and an electromagnetic coil as power sources of the device, and reciprocating sliding is generated between the stator and the electromagnetic coil under the condition of electrifying so as to drive the oil-well pump to work.
Chinese patent publication No.: CN103939056a discloses an oil extraction system of an oil-well pump and a submersible linear motor well and a working method thereof, wherein the oil-well pump comprises: a pump cylinder; the plunger is arranged at the inner side of the pump cylinder; one end of the disengaging gear, which is provided with a clamping head, is clamped or disengaged with a driving device of the oil pump, the other end of the disengaging gear is connected with the bottom end of the plunger, and the driving device drives the plunger to reciprocate through the disengaging gear; the travelling valve is arranged at the upper part of the inner cavity of the plunger; the fixed valve is arranged at the top end of the plunger and in the inner cavity of the pump cylinder; the oil outlet joint is connected with the top end of the pump cylinder through a sealing locking device; the outer side of one end of the sucker rod is connected with the inner side of the oil outlet connector in a threaded manner, and the sucker rod is used for providing external force for clamping or separating one end of the disconnecting device, which is provided with a clamping head, from the driving device of the oil pump.
At present, most oil pumps are in a fixed working mode and cannot flexibly work according to working requirements, so that power consumption and service life are influenced, meanwhile, the size of the submersible linear motor is long, and installation of a special well is not facilitated.
Disclosure of Invention
The invention aims to solve the problems that the existing submersible motor oil pump has single working mode, weak environment anti-interference performance and poor stroke precision when in oil exploitation, and further provides a submersible electric drive oil pump;
in order to achieve the above object, the present invention provides a submersible electric oil pump, which is characterized by comprising:
the oil pump assembly, the push rod assembly and the power assembly are coaxially and sequentially arranged from top to bottom, the bottom end of the oil pump assembly is connected with the top end of the push rod assembly through a connecting hoop, and the bottom end of the push rod assembly is inserted on the power output end of the power assembly;
the oil well pump assembly comprises an oil pipe coupling, a fixed valve assembly, a pump barrel, a traveling valve assembly, a plunger and a push rod coupling;
the push rod assembly adopts a submersible planetary roller or ball electric cylinder structure, and comprises a push rod, a sealing guide sleeve, a nut outer sleeve, a guide key, a submersible electric cylinder outer sleeve and a transmission unit, and the central control module controls the oil output by adjusting the feed quantity of the push rod;
the power assembly comprises a connecting sleeve, a coupling sleeve, a transmission shaft, a protector, an oil-submersible motor and a rotating speed sensor, the oil-submersible motor drives the push rod to stretch back and forth through rotating power, the push rod transmits the power which reciprocates up and down to the plunger to realize oil pumping and draining, and the oil-submersible motor can control the oil outlet amount through adjusting the rotating speed;
the monitoring module comprises a flowmeter, a displacement sensor and a rotation speed sensor, wherein the flowmeter is arranged in the oil pipe and used for detecting the oil output amount in unit time, the displacement sensor is arranged in the push rod assembly and used for detecting the push rod feeding amount, and the rotation speed sensor is connected with the submersible motor and used for detecting the rotation speed of the submersible motor;
the central control module is respectively connected with the monitoring module and the submersible motor, and is used for judging the actual oil output level, determining the adjusting mode of the push rod feeding amount at the second oil output level, comparing the adjusted push rod feeding amount with the maximum value of the push rod feeding amount, and determining the adjusting mode of the rotating speed of the submersible motor at the second comparison result.
Further, the central control module judges whether the oil output meets the standard according to the actual oil output detected by the flowmeter;
if the actual oil output is at the first oil output level, the central control module judges that the oil output meets the standard;
if the actual oil output is at the second oil output level, the central control module judges that the oil output does not meet the standard, and the current push rod feeding amount is required to be adjusted;
the first oil output level meets the requirement that the actual oil output is larger than or equal to the preset standard oil output, and the second oil output level meets the requirement that the actual oil output is smaller than the preset standard oil output.
Further, the central control module is provided with a mode of adjusting the push rod feeding amount when the actual oil output is at the second oil output level;
the first push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to a first push rod feeding amount;
the second push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the second push rod feeding amount;
the third push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the third push rod feeding amount;
wherein the current ram feed is less than the first ram feed and less than the second ram feed and less than the third ram feed.
Further, the central control module determines an adjusting mode of the push rod feeding amount according to an oil output amount difference value between the actual oil output amount and a preset standard oil output amount;
if the oil output difference value is at a first oil output difference value level, the central control module judges that the first push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a second oil output difference value level, the central control module judges that the second push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a third oil output difference value level, the central control module judges that the third push rod feeding amount adjusting mode is selected;
the first oil output difference level meets the condition that the oil output difference is smaller than or equal to a first preset oil output difference, the second oil output difference level meets the condition that the oil output difference is larger than the first preset oil output difference and smaller than or equal to a second preset oil output difference, and the third oil output difference level meets the condition that the oil output difference is larger than the second preset oil output difference.
Further, a push rod feeding amount maximum value is arranged in the central control module, and the central control module compares the adjusted push rod feeding amount with the push rod feeding amount maximum value to judge whether the adjusted push rod feeding amount meets the requirement or not;
if the first comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity meets the requirement;
if the second comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity does not meet the requirement, and the rotating speed of the submersible motor needs to be adjusted;
the first comparison result is that the adjusted push rod feeding amount is smaller than or equal to the maximum push rod feeding amount, and the second comparison result is that the adjusted push rod feeding amount is larger than the maximum push rod feeding amount.
Further, the central control module is provided with a mode of adjusting the rotating speed of the submersible motor under a second comparison result;
the first rotating speed adjusting mode is to adjust the current rotating speed to a first rotating speed;
the second rotating speed adjusting mode is to adjust the current rotating speed to a second rotating speed;
the third rotating speed adjusting mode is to adjust the current rotating speed to a third rotating speed;
wherein the current rotational speed is less than the first rotational speed less than the second rotational speed less than the third rotational speed.
Further, the central control module determines an adjusting mode of the rotating speed of the submersible motor according to the feeding quantity difference value of the adjusted feeding quantity of the push rod and the maximum value of the feeding quantity of the push rod;
if the feeding amount difference value is at a first feeding amount difference value level, the central control module judges that the first rotation speed adjusting mode is selected;
if the feeding amount difference value is at a second feeding amount difference value level, the central control module judges that the second rotating speed adjusting mode is selected;
if the feeding amount difference value is at a third feeding amount difference value level, the central control module judges that the third rotating speed adjusting mode is selected;
the first feeding amount difference level meets the feeding amount difference that is smaller than or equal to a first preset feeding amount difference, the second feeding amount difference level meets the feeding amount difference that is larger than the first preset feeding amount difference and smaller than or equal to a second preset feeding amount difference, and the third feeding amount difference level meets the feeding amount difference that is larger than the second preset feeding amount difference.
Further, the oil-well pump assembly of the oil drum comprises a fixed valve assembly, a pump drum, a traveling valve assembly, a plunger and a push rod coupling, wherein the oil pipe coupling is sleeved on the top end of the pump drum, the bottom end of the pump drum is connected with the top end of the push rod assembly through a connecting coupling, the fixed valve assembly is arranged in the pump drum and is fixedly connected with the inner wall of the top end of the pump drum, the traveling valve assembly is arranged below the fixed valve assembly and is in sliding connection with the inner wall of the pump drum, the bottom of the traveling valve assembly is connected to the plunger in an inserted mode, and the push rod coupling is sleeved on the bottom of the plunger.
Further, power pack includes adapter sleeve, coupling cover, transmission shaft, protector, diving oily motor and rotation speed sensor, diving oily motor sets up on rotation speed sensor, and diving oily motor's casing and rotation speed sensor top fixed connection, diving oily motor's power output shaft is vertical upwards to be set up, the transmission shaft passes through the shaft coupling and diving oily motor's power output shaft links to each other, the protector suit is on the outer disc of transmission shaft, and protector's casing and diving oily motor's casing fixed connection, the bottom suit of adapter sleeve is at the top of protector, the top of transmission shaft extends to outside the protector and sets up in the adapter sleeve, the top suit of transmission shaft is equipped with the coupling cover, push rod assembly's bottom cartridge is in adapter sleeve and the cover in power pack.
Further, the transmission unit comprises two modes of construction;
the first constitution mode is as follows: a roller screw and a planetary roller;
the second constitution mode is as follows: ball screw and a plurality of balls.
Compared with the prior art, the invention has the beneficial effects that compared with the traditional reciprocating motion of the oil-well pump structure of the submersible linear motor, the oil-well pump structure adopts a pure mechanical structure, has good environment anti-interference performance, meanwhile, in order to ensure the reliability and stability of the stroke precision of the pump body, the invention adopts the sealing guide sleeve as the guiding precision, and the stroke precision and the motor rotating speed can be effectively controlled through the combined action of the central control module and the monitoring module, thereby effectively reducing the power consumption of the oil-well pump and greatly prolonging the service life of the oil-well pump.
Furthermore, the central control module is arranged to judge whether the oil output meets the standard according to the actual oil output detected by the flowmeter, so that whether the push rod feeding amount and the rotating speed need to be adjusted is judged, useless power consumption of the oil pump in the exploitation process is effectively avoided, the power consumption of the oil pump is reduced, and the service life of the oil pump is prolonged.
Further, the central control module is provided with three adjusting modes of the push rod feeding amount under the condition that the actual oil output amount is at the second oil output amount level, namely a first push rod feeding amount adjusting mode, a second push rod feeding amount adjusting mode and a third push rod feeding amount adjusting mode, and the central control module reduces abrasion on internal components of the oil pump, prolongs the service life of the push rod, further reduces the power consumption of the oil pump and prolongs the service life of the oil pump through flexible adjustment of the push rod feeding amount;
furthermore, compared with the traditional oil pump structure, the reciprocating motion of the oil pump structure adopts a pure mechanical structure, so that electromagnetic interference in a complex mining environment is effectively avoided, and the oil pump structure has good environment anti-interference performance;
furthermore, the sealing guide sleeve is adopted as the guide accuracy, so that the reliability and stability of the pump body stroke accuracy can be ensured, the top of the sealing guide sleeve is in sealing sliding connection with the push rod part in the application, the reliability and stability of the pump body stroke accuracy can be ensured, sand grains are prevented from entering the sealing guide sleeve, and the service life of the oil pump is further prolonged.
Drawings
Fig. 1 is a schematic front view of a submersible electric oil pump structure described in the application;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic front view of the submersible electric oil pump structure described in the present application;
FIG. 4 is an enlarged view of a portion of FIG. 3;
in the figure: the oil pipe coupling comprises a 1 oil pipe coupling, a 2 fixed valve assembly, a 3 pump cylinder, a 4 traveling valve assembly, a 5 plunger, a 6 first oil inlet, a 7 push rod coupling, a 8 push rod, a 9 sealing guide sleeve, a 10 roller screw, a 11 nut sleeve, a 12 planetary roller, a 13 guide key, a 14 submersible electric cylinder sleeve, a 15 connecting sleeve, a 16 coupling sleeve, a 17 transmission shaft, a 18 protector, a 19 submersible motor, a 20 rotating speed sensor, a 21 second oil inlet, a 22 ball screw, a 23 ball, a 24 first support sleeve and a 25 second support sleeve.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1-4, the present invention provides a submersible electric oil pump, comprising:
the oil pump assembly, the push rod assembly and the power assembly are coaxially and sequentially arranged from top to bottom, the bottom end of the oil pump assembly is connected with the top end of the push rod assembly through a connecting hoop, and the bottom end of the push rod assembly is inserted on the power output end of the power assembly;
the oil well pump assembly comprises an oil pipe coupling 1, a fixed valve assembly 2, a pump cylinder 3, a traveling valve assembly 4, a plunger 5 and a push rod coupling 7;
the push rod assembly adopts a submersible planetary roller or ball electric cylinder structure, and comprises a push rod 8, a sealing guide 9 sleeve, a nut sleeve 11, a guide key 13, a submersible electric cylinder sleeve 14 and a transmission unit, and the central control module controls the oil output by adjusting the feed quantity of the push rod;
the power assembly comprises a connecting sleeve 15, a coupling sleeve 16, a transmission shaft 17, a protector 18, an oil-submersible motor 19 and a rotating speed sensor 20, the oil-submersible motor 19 drives the push rod to reciprocate and stretch through rotating power, the push rod 8 transmits the up-and-down reciprocating power to the plunger 5 to realize oil pumping and liquid discharging, and the oil-submersible motor 19 can control the oil outlet amount through adjusting the rotating speed;
the monitoring module comprises a flowmeter, a displacement sensor and a rotation speed sensor 20, wherein the flowmeter is arranged in the oil pipe and used for detecting the oil output amount in unit time, the displacement sensor is arranged in the push rod assembly and used for detecting the push rod feeding amount, and the rotation speed sensor 20 is connected with the submersible motor 19 and used for detecting the rotation speed of the submersible motor 19;
the central control module is respectively connected with the monitoring module and the submersible motor 19 and is used for judging the actual oil output level, determining the adjusting mode of the push rod feeding amount at the second oil output level, comparing the adjusted push rod feeding amount with the maximum value of the push rod feeding amount and determining the adjusting mode of the rotating speed of the submersible motor 19 at the second comparison result.
Specifically, the central control module judges whether the oil output meets the standard according to the actual oil output detected by the flowmeter;
if the actual oil output is at the first oil output level, the central control module judges that the oil output meets the standard;
if the actual oil output is at the second oil output level, the central control module judges that the oil output does not meet the standard, and the current push rod feeding amount is required to be adjusted;
the first oil output level meets the requirement that the actual oil output is larger than or equal to the preset standard oil output, and the second oil output level meets the requirement that the actual oil output is smaller than the preset standard oil output.
In this embodiment, a preset standard oil output D0 is set in the central control module, and the central control module compares the actual oil output D detected by the flowmeter with the preset standard oil output D0 to determine whether the oil output meets a standard;
if D is more than or equal to D0, the central control module judges that the actual oil output is at a first oil output level, and the oil output meets the standard;
if D is smaller than D0, the central control module judges that the actual oil output is at a second oil output level, the oil output does not accord with the standard, and the current push rod feeding amount is required to be adjusted.
In this embodiment, the push rod feed amount is the maximum displacement when the push rod 8 reciprocates.
Specifically, the central control module is provided with a mode of adjusting the push rod feeding amount when the actual oil output is at a second oil output level;
the first push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to a first push rod feeding amount;
the second push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the second push rod feeding amount;
the third push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the third push rod feeding amount;
wherein the current ram feed is less than the first ram feed and less than the second ram feed and less than the third ram feed.
Specifically, the central control module determines an adjustment mode of the push rod feeding amount according to an oil output difference value between an actual oil output amount and a preset standard oil output amount;
if the oil output difference value is at a first oil output difference value level, the central control module judges that the first push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a second oil output difference value level, the central control module judges that the second push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a third oil output difference value level, the central control module judges that the third push rod feeding amount adjusting mode is selected;
the first oil output difference level meets the condition that the oil output difference is smaller than or equal to a first preset oil output difference, the second oil output difference level meets the condition that the oil output difference is larger than the first preset oil output difference and smaller than or equal to a second preset oil output difference, and the third oil output difference level meets the condition that the oil output difference is larger than the second preset oil output difference.
In this embodiment, a first preset oil output difference Δd1 and a second preset oil output difference Δd2 are set in the central control module, Δd1 is smaller than Δd2, the central control module calculates a difference between D and D0 oil output when determining that the oil output does not meet the standard, Δd=d0-D is set, and the central control module compares Δd with Δd1 and Δd2 respectively to determine a current push rod feed amount adjustment mode;
if the delta D is less than or equal to delta D1, the central control module judges that the current push rod feeding amount is regulated by adopting a first push rod feeding amount regulating mode;
if Δd1 is more than Δd and less than or equal to Δd2, the central control module determines to adjust the current push rod feed amount by adopting a second push rod feed amount adjusting mode;
if the delta D is more than or equal to delta D2, the central control module judges that the current push rod feeding amount is regulated by adopting a third push rod feeding amount regulating mode.
It should be understood by those skilled in the art that, for the preset standard oil output D0, the first preset oil output difference Δd1 and the second preset oil output difference Δd2, the values of the preset standard oil output D0, the first preset oil output difference Δd1 and the second preset oil output difference Δd2 may be set according to actual needs, and the oil output of the submersible motors with different specifications may have a large difference, and meanwhile, the oil output is affected by many factors, so the present embodiment does not specifically limit the preset standard oil output D0, the first preset oil output difference Δd1 and the second preset oil output difference Δd2.
Specifically, the central control module is internally provided with a mode for adjusting the push rod feeding amount;
the first push rod feeding amount adjusting mode is to select a first push rod feeding amount adjusting coefficient alpha 1 to adjust the current push rod feeding amount S0 to the first push rod feeding amount S1, and setting; s1=s0×α1;
the second push rod feeding amount adjusting mode is to select a second push rod feeding amount adjusting coefficient alpha 2 to adjust the current push rod feeding amount S0 to the second push rod feeding amount S2, and setting; s2=s0×α2;
the third push rod feeding amount adjusting mode is to select a third push rod feeding amount adjusting coefficient alpha 3 to adjust the current push rod feeding amount S0 to a third push rod feeding amount S3, and setting; s3=s0×α3;
wherein S0 is more than S1 is more than S2 is more than S3, and 1 is more than alpha 1 and less than alpha 2 and less than alpha 3 is more than 2.
In this embodiment, α1=1.2, α2=1.5, and α3=1.8 are preferably set.
Specifically, a push rod feeding amount maximum value is arranged in the central control module, and the central control module compares the adjusted push rod feeding amount with the push rod feeding amount maximum value to judge whether the adjusted push rod feeding amount meets the requirement or not;
if the first comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity meets the requirement;
if the second comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity does not meet the requirement, and the rotating speed of the submersible motor needs to be adjusted;
the first comparison result is that the adjusted push rod feeding amount is smaller than or equal to the maximum push rod feeding amount, and the second comparison result is that the adjusted push rod feeding amount is larger than the maximum push rod feeding amount.
In this embodiment, the central control module is provided with a maximum value Smax of the push rod feeding amount, and compares the adjusted push rod feeding amount Si, i=1, 2,3 with the maximum value Smax of the push rod feeding amount to determine whether the adjusted push rod feeding amount meets the requirement;
if Si is less than or equal to Smax, the central control module judges that the adjusted push rod feeding quantity meets the requirement;
if Si is larger than Smax, the central control module judges that the adjusted push rod feeding amount does not meet the requirement, and the rotating speed of the submersible motor needs to be adjusted.
Specifically, the central control module is provided with a mode of adjusting the rotating speed of the submersible motor under a second comparison result;
the first rotating speed adjusting mode is to adjust the current rotating speed to a first rotating speed;
the second rotating speed adjusting mode is to adjust the current rotating speed to a second rotating speed;
the third rotating speed adjusting mode is to adjust the current rotating speed to a third rotating speed;
wherein the current rotational speed is less than the first rotational speed less than the second rotational speed less than the third rotational speed.
Specifically, the central control module determines a regulating mode of the rotating speed of the submersible motor according to a feeding amount difference value between the regulated feeding amount of the push rod and the maximum value of the feeding amount of the push rod;
if the feeding amount difference value is at a first feeding amount difference value level, the central control module judges that the first rotation speed adjusting mode is selected;
if the feeding amount difference value is at a second feeding amount difference value level, the central control module judges that the second rotating speed adjusting mode is selected;
if the feeding amount difference value is at a third feeding amount difference value level, the central control module judges that the third rotating speed adjusting mode is selected;
the first feeding amount difference level meets the feeding amount difference that is smaller than or equal to a first preset feeding amount difference, the second feeding amount difference level meets the feeding amount difference that is larger than the first preset feeding amount difference and smaller than or equal to a second preset feeding amount difference, and the third feeding amount difference level meets the feeding amount difference that is larger than the second preset feeding amount difference.
In this embodiment, a first preset feed amount difference Δs1 and a second preset feed amount difference Δs2 are set in the central control module, Δs1 is smaller than Δs2, when the central control module determines that the adjusted push rod feed amount does not meet the requirement, the central control module calculates a feed amount difference Δs between Si and Smax, sets Δs=si-Smax, and compares Δs with Δs1 and Δs2 respectively to determine an adjustment mode of the rotation speed of the submersible motor;
if delta S is less than or equal to delta S1, the central control module judges that the rotating speed of the submersible motor is adjusted by adopting a first rotating speed adjusting mode;
if delta S1 is more than delta S and less than or equal to delta S2, the central control module judges that the rotation speed of the submersible motor is regulated by adopting a second rotation speed regulation mode;
and if the delta S is more than or equal to delta S2, the central control module judges that the rotation speed of the submersible motor is regulated by adopting a third rotation speed regulating mode.
It should be understood by those skilled in the art that the values of the first preset feed amount difference Δs1 and the second preset feed amount difference Δs2 may be set according to actual needs, and the present embodiment is not specifically limited. The maximum value Smax of the feed amount can be set according to the apparatus specific parameters.
Specifically, the central control module is provided with a mode for adjusting the rotating speed of the submersible motor;
the first rotation speed adjusting mode is to select a first rotation speed adjusting coefficient beta 1 to adjust the rotation speed R0 of the current submersible motor to a first rotation speed R1, and set; r1=r0×β1;
the second rotating speed adjusting mode is to select a second rotating speed adjusting coefficient beta 2 to adjust the rotating speed R0 of the current submersible motor to a second rotating speed R2, and setting; r2=r0×β2;
the third rotating speed adjusting mode is to select a third rotating speed adjusting coefficient beta 3 to adjust the current rotating speed R0 of the submersible motor to a third rotating speed R3, and setting; r3=r0×β3;
wherein, beta 1 is more than 1 and beta 2 is more than 2 and beta 3 is more than 1.5;
in this embodiment, β1=1.1, β2=1.2, and β3=1.3 are preferably set.
The second embodiment is described with reference to fig. 1-4, and the difference between the first embodiment and the first embodiment is that the oil pump assembly includes a fixed valve assembly 2, a pump cylinder 3, a traveling valve assembly 4, a plunger 5 and a push rod coupling 7, the oil pipe coupling 1 is sleeved on the top end of the pump cylinder 3, the bottom end of the pump cylinder 3 is connected with the top end of the push rod assembly through a connecting hoop, the fixed valve assembly 2 is disposed in the pump cylinder 3, the fixed valve assembly 2 is fixedly connected with the inner cylinder wall at the top end of the pump cylinder 3, the traveling valve assembly 4 is disposed below the fixed valve assembly 2, the traveling valve assembly 4 is slidably connected with the inner cylinder wall of the pump cylinder 3, the bottom of the traveling valve assembly 4 is inserted on the plunger 5, and the push rod coupling 7 is sleeved on the bottom of the plunger 5. Other compositions and connection modes are the same as in the first embodiment.
In this embodiment, the oil pump assembly is the main driven component in this application, drives the traveling valve assembly 4 to move towards the fixed valve assembly 2 through the plunger 5, and simultaneously transports the well fluid entering the pump barrel 3 into the oil pipe.
The third embodiment is described with reference to fig. 1-4, and the difference between the third embodiment and the second embodiment is that the plunger 5 includes a plug-in section, a transition section and a connection section, the plug-in section, the transition section and the connection section are coaxially arranged from top to bottom in sequence, the transition section is of a conical cylinder structure, the diameter of the large mouth end of the transition section is the same as that of the bottom end of the plug-in section, the large mouth end of the transition section is integrally formed with the bottom end of the plug-in section, the diameter of the small mouth end of the transition section is the same as that of the top end of the connection section, the small mouth end of the transition section and the top end of the connection section are integrally formed, the traveling valve assembly 4 is inserted on the plug-in section, the push rod 7 is sleeved on the lower part of the connection section, and a plurality of first oil inlets 6 are circumferentially equidistant on the conical outer circular surface of the transition section. Other compositions and connection modes are the same as those of the second embodiment.
In a fourth embodiment, referring to fig. 1 to 4, the difference between the present embodiment and the third embodiment is that a plurality of second oil inlets 21 are machined on the outer circumferential surface of the bottom end of the pump cylinder 3 at equal intervals in the circumferential direction. Other compositions and connection modes are the same as those of the third embodiment.
In this embodiment, the oil enters the oil cylinder through the second oil inlet 21, and the oil is introduced into the plunger through the first oil inlet 6, and simultaneously, the oil is introduced into the oil pipe as the pump body works.
Fifth embodiment: the traveling valve assembly 4 of the present embodiment is mounted on the upper end surface of the plunger 5, as described with reference to fig. 1 to 4. Other compositions and connection modes are the same as those of the fourth embodiment.
In a sixth embodiment, referring to fig. 1 to 4, the power assembly includes a connecting sleeve 15, a coupling sleeve 16, a transmission shaft 17, a protector 18, an oil-submersible motor 19 and a sensor 20, where the oil-submersible motor 19 is disposed on the rotation speed sensor 20, a housing of the oil-submersible motor 19 is fixedly connected with the top of the rotation speed sensor 20, a power output shaft of the oil-submersible motor 19 is vertically disposed upwards, the transmission shaft 17 is connected with the power output shaft of the oil-submersible motor 19 through a coupling, the protector 18 is sleeved on an outer circumferential surface of the transmission shaft 17, a housing of the protector 18 is fixedly connected with the housing of the oil-submersible motor 19, a bottom of the connecting sleeve 15 is sleeved on the top of the protector 18, a top end of the transmission shaft 17 extends out of the protector 18 and is disposed in the connecting sleeve 15, a top end of the transmission shaft 17 is sleeved with the coupling sleeve 16, and a bottom end of the push rod assembly is inserted into the connecting sleeve 15 and the coupling sleeve 16 in the power assembly. Other compositions and connection modes are the same as those of the fifth embodiment.
In this embodiment, the submersible motor 19 is used as a main power source of the pump body, and the power of the submersible motor 19 is transmitted to the push rod assembly through the transmission shaft 17, and the protector 18 is used for lubrication, cooling and respiratory protection of the submersible motor 19 and the submersible cylinder transmission unit.
The seventh embodiment is described with reference to fig. 1-4, the push rod assembly includes a push rod 8, a sealing guide sleeve 9, a nut housing 11, a guide key 13, a submersible electric cylinder housing 14 and a transmission unit, the submersible electric cylinder housing 14 is disposed between the oil pump assembly and the power assembly, the top end of the submersible electric cylinder housing 14 is connected with the bottom end of the pump cylinder 3 through a connecting hoop, the bottom end of the submersible electric cylinder housing 14 is inserted at the top of a connecting sleeve 15, the push rod 8 is disposed in the submersible electric cylinder housing 14, the top end of the push rod 8 extends to the outside of the submersible electric cylinder housing 14 and is inserted in a push rod coupling 7, the sealing guide sleeve 9 is sleeved on the push rod 8, the sealing guide sleeve 9 is fixedly connected with the inner wall of the submersible electric cylinder housing 14, the bottom end of the push rod 8 is provided with the nut housing 11 through a bolt, a key slot is processed on the outer circumferential surface of the nut housing 11, a guide key 13 is processed on the inner wall of the sealing guide sleeve 9 along the length direction of the submersible electric cylinder housing 9, the guide slot is correspondingly matched with the guide key 13 and is disposed in the transmission unit, the transmission unit is disposed in the transmission unit and is sleeved at the bottom end of the push rod 8, and the transmission unit is disposed in the transmission unit, and the transmission unit is connected with the bottom end of the push rod 8 through the nut housing 13, and the transmission unit is disposed in the transmission unit. Other compositions and connection modes are the same as those of the sixth embodiment.
In this embodiment, be equipped with annular bulge on the inner wall of sealed uide bushing 9 top, annular bulge and sealed uide bushing 9 integrated into one piece set up, be equipped with the sealing washer on annular bulge and the push rod 8 contact surface, when having guaranteed that push rod 8 slides along sealed uide bushing 9, can guarantee the leakproofness of structure.
In an eighth embodiment, referring to fig. 1-2, the first configuration mode of the transmission unit is as follows: a roller screw and a planetary roller;
in the first mode of construction, the transmission unit includes a roller screw 10 and a planetary roller 12, the top end of the roller screw 10 is disposed in a receiving hole at the bottom end of the push rod 8, the bottom end of the roller screw 10 extends to the outside of the submersible cylinder jacket 14 and is inserted into the coupling sleeve 16, the planetary roller 12 is sleeved on a threaded portion of the roller screw 10, the planetary roller 12 is in threaded connection with the roller screw 10, the nut jacket 11 is sleeved on an external threaded surface of the planetary roller 12, the nut jacket 11 is in threaded connection with the planetary roller 12, and the nut jacket 11 slides reciprocally on the roller screw 10 through the planetary roller 12. Other compositions and connection manners are the same as those of the seventh embodiment.
A ninth embodiment is described with reference to fig. 3 to 4, in which the second configuration mode of the transmission unit is: ball screw and a plurality of balls.
The eighth difference between this embodiment and the specific embodiment is that, in the second configuration, the transmission unit includes a ball screw 22 and a plurality of balls 23, the top end of the ball screw 22 is disposed in a receiving hole at the bottom end of the push rod 8, the bottom end of the ball screw 22 extends to the outside of the submersible cylinder housing 14 and is inserted into the coupling sleeve 16, the nut housing 11 is sleeved on a threaded portion of the ball screw 22, and a plurality of balls 23 are disposed between the nut housing 11 and the ball screw 22, and the nut housing 11 slides reciprocally on the ball screw 22 through the plurality of balls 23. Other compositions and connection modes are the same as those of the eighth embodiment.
In a tenth embodiment, referring to fig. 1-2, a first support sleeve 24 is disposed between the polish rod portion in the roller screw 10 and the submersible electric cylinder jacket 14, the first support sleeve 24 is matched with the submersible electric cylinder jacket 14, two first support bearings are disposed between the first support sleeve 24 and the polish rod portion in the roller screw 10, and the polish rod portion in the roller screw 10 is rotationally connected with the first support sleeve 24 through the two first support bearings. Other compositions and connection manners are the same as those of the embodiment nine.
In an eleventh embodiment, referring to fig. 3-4, a second supporting sleeve 25 is disposed between the polish rod portion in the ball screw 22 and the electric submersible cylinder jacket 14, the second supporting sleeve 25 is matched with the electric submersible cylinder jacket 14, two second supporting bearings are disposed between the second supporting sleeve 25 and the polish rod portion in the ball screw 22, and the polish rod portion in the ball screw 22 is rotationally connected with the second supporting sleeve 25 through the two second supporting bearings. Other compositions and connection modes are the same as those of the specific embodiment.
Principle of operation
The working principle of the planetary roller is described with reference to fig. 1-2, the planetary roller is not only provided with threads in the circumferential direction, but also provided with teeth at the end part of the roller, the teeth at the end part of the planetary roller 12 are engaged with the teeth at the inner side of the nut housing 11, and when the roller rotates, the whole planetary roller set can rotate at the inner side of the nut housing.
The downhole submersible motor 19 respectively performs forward and reverse rotation, the submersible motor outputs power to drive the roller screw 10 to perform forward and reverse rotation through the transmission shaft 17, the planetary roller 12 is respectively connected with the roller screw 10 and the nut jacket 11 through transmission thread wires, and the planetary roller assembly is sleeved on the thread roller screw like a nut, as shown in fig. 2. Due to the meshing effect of the roller and the roller screw thread groove, when the roller screw 10 rotates in the forward and reverse directions, the planetary roller 12 is driven to drive the nut sleeve 11 to move along the linear direction of the roller screw 10, the guide key 13 fixes the guide groove in the sealing guide sleeve 9 to slide up and down, so that the nut sleeve 11 and the push rod 8 connected with the guide key do not rotate, and do up and down reciprocating linear movement respectively, and when the nut sleeve 11 drives the push rod 8 to reciprocate up and down, the plunger 5 of the submersible electric drive oil pump is driven to reciprocate up and down synchronously, thereby oil well fluid is fed into a ground wellhead flow from the underground through the rodless oil extraction system of an oil well pump, and oil extraction and liquid drainage operation is completed.
The working principle of the present application is described with reference to fig. 3-4, wherein the circumference of the ball screw 22 is provided with an external thread groove with a hemispherical cross section, the nut housing 11 is matched with the ball screw 22, and the matched part of the nut housing 11 and the ball screw 22 is provided with an internal thread groove with a hemispherical cross section. A set of spatially arranged balls 23 roll in a circulation path formed between the outer spiral groove and the inner spiral groove.
The downhole submersible motor 19 respectively performs forward and reverse rotation, the submersible motor 19 outputs power to drive the ball screw 22 to perform forward and reverse rotation through the transmission shaft 17, the ball 23 is respectively connected with the ball screw 22 and the nut sleeve 11 through the transmission spiral groove, and when the submersible motor drives the ball screw to perform forward and reverse rotation, the ball 23 is driven to roll in a circulating channel between the ball screw 22 and the nut sleeve 11 to push the nut sleeve 11 to perform axial reciprocating motion, so that the push rod 8 is driven to perform reciprocating linear motion.
The guide key 13 slides up and down in the fixed guide groove in the sealed guide sleeve 9, so that the nut sleeve 11 and the push rod 8 connected with the guide key do not generate rotary motion and do up and down reciprocating rectilinear motion respectively, and when the nut sleeve 11 drives the push rod 8 to reciprocate up and down, the plunger 5 of the submersible electric drive oil pump is driven to reciprocate up and down synchronously, the plunger reciprocates up and down and the travelling valve assembly 4 and the fixed valve assembly 2 cooperate to continuously convey well fluid from the pump body to a wellhead pipe on the ground, so that oil extraction operation is completed.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An submersible electric drive oil pump, comprising:
the oil pump assembly, the push rod assembly and the power assembly are coaxially and sequentially arranged from top to bottom, the bottom end of the oil pump assembly is connected with the top end of the push rod assembly through a connecting hoop, and the bottom end of the push rod assembly is inserted on the power output end of the power assembly;
the oil well pump assembly comprises an oil pipe coupling, a fixed valve assembly, a pump barrel, a traveling valve assembly, a plunger and a push rod coupling;
the push rod assembly adopts a submersible planetary roller or ball electric cylinder structure, and comprises a push rod, a sealing guide sleeve, a nut outer sleeve, a guide key, a submersible electric cylinder outer sleeve and a transmission unit, and the central control module controls the oil output by adjusting the feed quantity of the push rod;
the power assembly comprises a connecting sleeve, a coupling sleeve, a transmission shaft, a protector, an oil-submersible motor and a rotating speed sensor, the oil-submersible motor drives the push rod to stretch back and forth through rotating power, the push rod transmits the power which reciprocates up and down to the plunger to realize oil pumping and draining, and the oil-submersible motor can control the oil outlet amount through adjusting the rotating speed;
the monitoring module comprises a flowmeter, a displacement sensor and a rotation speed sensor, wherein the flowmeter is arranged in the oil pipe and used for detecting the oil output amount in unit time, the displacement sensor is arranged in the push rod assembly and used for detecting the push rod feeding amount, and the rotation speed sensor is connected with the submersible motor and used for detecting the rotation speed of the submersible motor;
the central control module is respectively connected with the monitoring module and the submersible motor, and is used for judging the actual oil output level, determining the adjusting mode of the push rod feeding amount at the second oil output level, comparing the adjusted push rod feeding amount with the maximum value of the push rod feeding amount, and determining the adjusting mode of the rotating speed of the submersible motor at the second comparison result.
2. The submersible electric oil pump according to claim 1, wherein the central control module determines whether the oil output quantity meets a criterion according to the actual oil output quantity detected by the flowmeter;
if the actual oil output is at the first oil output level, the central control module judges that the oil output meets the standard;
if the actual oil output is at the second oil output level, the central control module judges that the oil output does not meet the standard, and the current push rod feeding amount is required to be adjusted;
the first oil output level meets the requirement that the actual oil output is larger than or equal to the preset standard oil output, and the second oil output level meets the requirement that the actual oil output is smaller than the preset standard oil output.
3. The submersible electric oil pump according to claim 2, wherein the central control module is provided with a mode of adjusting the push rod feed amount when the actual oil output is at a second oil output level;
the first push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to a first push rod feeding amount;
the second push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the second push rod feeding amount;
the third push rod feeding amount adjusting mode is to adjust the current push rod feeding amount to the third push rod feeding amount;
wherein the current ram feed is less than the first ram feed and less than the second ram feed and less than the third ram feed.
4. The submersible electric oil pump according to claim 3, wherein the central control module determines the adjustment mode of the push rod feed amount according to the oil output difference between the actual oil output amount and the preset standard oil output amount;
if the oil output difference value is at a first oil output difference value level, the central control module judges that the first push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a second oil output difference value level, the central control module judges that the second push rod feeding amount adjusting mode is selected;
if the oil output difference value is at a third oil output difference value level, the central control module judges that the third push rod feeding amount adjusting mode is selected;
the first oil output difference level meets the condition that the oil output difference is smaller than or equal to a first preset oil output difference, the second oil output difference level meets the condition that the oil output difference is larger than the first preset oil output difference and smaller than or equal to a second preset oil output difference, and the third oil output difference level meets the condition that the oil output difference is larger than the second preset oil output difference.
5. The submersible electric-driven oil well pump according to claim 4, wherein a push rod feeding amount maximum value is arranged in the central control module, and the central control module compares the adjusted push rod feeding amount with the push rod feeding amount maximum value to determine whether the adjusted push rod feeding amount meets the requirement;
if the first comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity meets the requirement;
if the second comparison result is obtained, the central control module judges that the adjusted push rod feeding quantity does not meet the requirement, and the rotating speed of the submersible motor needs to be adjusted;
the first comparison result is that the adjusted push rod feeding amount is smaller than or equal to the maximum push rod feeding amount, and the second comparison result is that the adjusted push rod feeding amount is larger than the maximum push rod feeding amount.
6. The submersible electric oil pump according to claim 5, wherein the central control module is provided with a mode of adjusting the rotation speed of the submersible motor under the second comparison result;
the first rotating speed adjusting mode is to adjust the current rotating speed to a first rotating speed;
the second rotating speed adjusting mode is to adjust the current rotating speed to a second rotating speed;
the third rotating speed adjusting mode is to adjust the current rotating speed to a third rotating speed;
wherein the current rotational speed is less than the first rotational speed less than the second rotational speed less than the third rotational speed.
7. The submersible electric oil pump according to claim 6, wherein the central control module determines a manner of adjusting the rotation speed of the submersible motor according to a difference between the adjusted push rod feed amount and a maximum push rod feed amount;
if the feeding amount difference value is at a first feeding amount difference value level, the central control module judges that the first rotation speed adjusting mode is selected;
if the feeding amount difference value is at a second feeding amount difference value level, the central control module judges that the second rotating speed adjusting mode is selected;
if the feeding amount difference value is at a third feeding amount difference value level, the central control module judges that the third rotating speed adjusting mode is selected;
the first feeding amount difference level meets the feeding amount difference that is smaller than or equal to a first preset feeding amount difference, the second feeding amount difference level meets the feeding amount difference that is larger than the first preset feeding amount difference and smaller than or equal to a second preset feeding amount difference, and the third feeding amount difference level meets the feeding amount difference that is larger than the second preset feeding amount difference.
8. The submersible electric oil pump according to claim 1, wherein the oil pump assembly comprises a fixed valve assembly, a pump barrel, a traveling valve assembly, a plunger and a push rod coupling, the oil pipe coupling is sleeved on the top end of the pump barrel, the bottom end of the pump barrel is connected with the top end of the push rod assembly through a connecting hoop, the fixed valve assembly is arranged in the pump barrel, the fixed valve assembly is fixedly connected with the inner barrel wall of the top end of the pump barrel, the traveling valve assembly is arranged below the fixed valve assembly, the traveling valve assembly is in sliding connection with the inner barrel wall of the pump barrel, the bottom of the traveling valve assembly is connected to the plunger in a plug-in manner, and the push rod coupling is sleeved on the bottom of the plunger.
9. The submersible electric oil pump according to claim 1, wherein the power assembly comprises a connecting sleeve, a coupling sleeve, a transmission shaft, a protector, a submersible motor and a rotating speed sensor, the submersible motor is arranged on the rotating speed sensor, a shell of the submersible motor is fixedly connected with the top of the rotating speed sensor, a power output shaft of the submersible motor is vertically upwards arranged, the transmission shaft is connected with the power output shaft of the submersible motor through a coupling, the protector is sleeved on the outer circular surface of the transmission shaft, the shell of the protector is fixedly connected with the shell of the submersible motor, the bottom of the connecting sleeve is sleeved on the top of the protector, the top of the transmission shaft extends out of the protector and is arranged in the connecting sleeve, the top of the transmission shaft is sleeved with the coupling sleeve, and the bottom of the push rod assembly is inserted into the connecting sleeve and the coupling sleeve in the power assembly.
10. The submersible electric oil pump of claim 1, wherein the transmission unit comprises two modes of construction;
the first constitution mode is as follows: a roller screw and a planetary roller;
the second constitution mode is as follows: ball screw and a plurality of balls.
CN202310375019.3A 2023-04-10 2023-04-10 Submersible electric drive oil pump Active CN116412112B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275465A (en) * 2007-03-27 2008-10-01 普拉德研究及开发股份有限公司 Monitoring and automatic control of operating parameters for a downhole oil/water separation system
US20090068026A1 (en) * 2007-09-07 2009-03-12 James Henry Downhole Pump
RU2532469C1 (en) * 2013-06-18 2014-11-10 Закрытое акционерное общество "ПАРМ-ГИНС" Submersible pump set
CN204061121U (en) * 2014-09-11 2014-12-31 百米马（天津）有限公司 A kind of intelligent control ball screw commutation oil-immersed pump
WO2016057330A1 (en) * 2014-10-06 2016-04-14 Baker Hughes Incorporated Motor reversal system for linear drive well pumps
CN108386348A (en) * 2018-04-26 2018-08-10 西南石油大学 A kind of inner screw driving downhole pumping installation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275465A (en) * 2007-03-27 2008-10-01 普拉德研究及开发股份有限公司 Monitoring and automatic control of operating parameters for a downhole oil/water separation system
US20090068026A1 (en) * 2007-09-07 2009-03-12 James Henry Downhole Pump
RU2532469C1 (en) * 2013-06-18 2014-11-10 Закрытое акционерное общество "ПАРМ-ГИНС" Submersible pump set
CN204061121U (en) * 2014-09-11 2014-12-31 百米马（天津）有限公司 A kind of intelligent control ball screw commutation oil-immersed pump
WO2016057330A1 (en) * 2014-10-06 2016-04-14 Baker Hughes Incorporated Motor reversal system for linear drive well pumps
CN108386348A (en) * 2018-04-26 2018-08-10 西南石油大学 A kind of inner screw driving downhole pumping installation

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