CN208718914U - Reciprocating rotation screw pump based on the driving of sucker rod pumping bar - Google Patents
Reciprocating rotation screw pump based on the driving of sucker rod pumping bar Download PDFInfo
- Publication number
- CN208718914U CN208718914U CN201821447610.6U CN201821447610U CN208718914U CN 208718914 U CN208718914 U CN 208718914U CN 201821447610 U CN201821447610 U CN 201821447610U CN 208718914 U CN208718914 U CN 208718914U
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- ball
- screw
- screw rod
- bearing
- pump
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- 238000005086 pumping Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000004576 sand Substances 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
Based on the reciprocating rotation screw pump of sucker rod pumping bar driving, belongs to oil field and output equipment technical field, be made of in structure helicoidal gear and reciprocating rotation screw pump, helicoidal gear is made of ball spline line slideway auxiliary and ball helical gearing pair；Ball spline line slideway auxiliary is returned pearl reverser, ball, ball screw axis and axial baffle and is connected and composed by spline housing, ball；Ball helical gearing pair is returned pearl reverser, ball, ball screw axis and circumferential baffle by screw-casing, ball and is connected and composed；Reciprocating rotation screw pump is connected and composed by gear set, gearbox seals end cap, check valve, yin-yang rotor, screw rod bushing, bearing and bearing (ball) cover；The utility model is other than being adapted to the when oil exploitation of high-moisture of high viscosity, high sand content, high oil gas with screw pump, the adaptable and service life for also having bar plunger pump to recover the oil is long, the features such as can be used for deep-well oil-extraction, the utility model realizes that up-down stroke can pump, and substantially increases production efficiency.
Description
Technical field
The utility model belongs to oil field and outputs equipment technical field, is related to a kind of screw pump, particularly relates to one kind
The reciprocating rotation screw pump based on the driving of sucker rod pumping bar for oilfield exploitation.
Background technique
With the continuous development of each oil field development, the difficulty of oil field development is continuously increased, due to the stratum energy of oil-extracting well
Amount reduces, and hydrodynamic face is declined to a great extent, and many oil fields is caused to occur the viscous crude of high sand content, high oil-gas ratio in succession.Cause have bar
The plunger efficiency of pump decline that plunger pump recovers the oil, efficiency is even lower than 30%, and frequent occurrence sand card the problems such as, seriously affect
Production efficiency, so that many oil wells are scrapped in advance.It is the more satisfactory machine side of adopting using screw pump oil production for these situations
Formula.Currently, having the oil recovery of bar plunger pump is the widest mechanical oil recovery technology of current domestic and international application, mechanical oil well in the world
Number has been more than the 9% of total producing well number, and 80%~85% mechanical oil well, which all uses, bar plunger pump oil production method.Screw pump with
There is bar plunger pump to compare, there is oil recovery efficiency height, suction capacity is strong and is also highly adaptable for high viscosity, high sand content, high oil
The oil extraction of gas ratio, effect in oilfield production is more and more significant, and number of applications is just becoming in apparent rise with horizontal
Gesture.If thering is roofbolt plug pump machine tool oil recovery technique to be transformed into existing screw pump oil production technology for existing both at home and abroad, no matter adopt
It is exploited with the screw pump of existing any drive form, can certainly will all cause original extensive and " three take out " is largely used to adopt
Oily equipment and its ground system idle is scrapped.
Utility model content
The purpose of this utility model be in view of the above shortcomings of the prior art, propose it is a kind of based on sucker rod pumping bar driving
Reciprocating rotation screw pump, by utilizing the advantages of having bar oil recovery technique and screw pump oil production technology, in addition to being adapted to screw pump
In the adaptability for outside the when oil exploitation of high-moisture of high viscosity, high sand content, high oil gas, also thering is bar plunger pump to recover the oil
The strong and service life is long, and the feature that can be used for deep-well oil-extraction etc., and is rolling friction pair between each opposed parts in direct rotary mechanism,
Therefore its mechanical efficiency can be improved, Pumping action can be achieved in screw rod dextrorotation and derotation, substantially increases production efficiency.
The technical solution of the utility model is: the reciprocating rotation screw pump based on the driving of sucker rod pumping bar, including sucker rod,
The oil inlet on screw rod pump case is arranged in screw rod pump case；It is characterized by: the reciprocating rotation screw pump is by worm drive
Device and reciprocating rotation screw pump composition；
The helicoidal gear is made of ball spline line slideway auxiliary and ball helical gearing pair；The ball spline
Line slideway auxiliary is returned pearl reverser, ball, ball screw axis and axial baffle and is connected and composed by spline housing, ball, the spline
Set forms spline with ball screw axis and connect, and the spline housing forms circumferentially fixed company by soket head cap screw and screw rod pump case
It connects, the two sides of the spline housing are arranged in the axial baffle connection；The ball helical gearing pair is by screw-casing, ball Hui Zhu
Reverser, ball, ball screw axis and circumferential baffle connect and compose, and the screw-casing and ball screw axis form transmission and connect
It connects, the screw-casing is cooperatively connected by bearing and screw rod pump case, and the circumferential direction baffle plate setting is in the outside of the screw-casing；
The sucker rod is fixed by screw thread and straight pin with ball screw axis connection, and the ball screw axis is under the drive of sucker rod
It does reciprocating linear motion；The outer surface of the ball screw axis is equipped with ball straight trough and ball screw slot, the spline housing and spiral shell
The inner surface of rotation set is equipped with identical ball straight trough and ball screw slot and is recycled with the inside for realizing ball, and it is anti-that the ball returns pearl
It is equipped with bead returning groove to one end of device, to realize the outer loop of ball；The linear reciprocating motion of the ball screw axis drives spiral shell
Rotation set and spline spiral countershaft set rotate, and the helicoidal gear is cooperatively connected by bearing and screw rod pump case；
The reciprocating rotation screw pump is by gear set, check valve, female rotor, male rotor, screw rod bushing, bearing (ball) cover, tooth
Roller box end cover and bearing connect and compose；The gear set is arranged on the input shaft end of the female rotor and male rotor, institute
It states gear set and is connected by key and formed with yin, yang rotor circumferentially fixed, and axial restraint, institute are formed by hex nut and bushing
The shaft end that bushing is arranged in bearing is stated, the shaft end of bearing is arranged in the bearing (ball) cover, and the bearing (ball) cover passes through interior hexagonal spiral shell
Nail is fixed with screw pump cage connection, and the gearbox seals end cap is fitted tightly over the end face of bearing (ball) cover, the gear-box
The oil sealing connecting with yin, yang rotor seal is equipped in end cover；The screw rod lining is set on the female rotor and male rotor
Outside, the screw rod bushing and female rotor, male rotor form chamber, the screw rod bushing and screw rod pump case is fixed connects
It connects, the screw rod bushing is equipped with disengaging oilhole, and the two sides of the screw rod bushing are equipped with check valve, and the check valve is by valve
Body, spool and spool baffle are constituted, and sealing block is equipped between the check valve and screw rod pump case, and the spool baffle plate setting exists
Between the check valve and screw rod bushing, the output end of the male rotor passes through splined couplers and the spline spiral countershaft set
It is connected.
The sucker rod is hollow structure, is moved in a straight line by power source drive.
The ball screw shaft head is in screwed frustum cone structure.
It is equipped with sealing baffle between the spline spiral countershaft set and screw rod pump case, realizes that sealing is anti-by sealing baffle
The only entrance of dust.
The oil inlet is in be symmetrically set on screw rod pump case.
The screw rod sleeve outer surface is equipped with symmetrical convex block, and screw rod pump case is equipped with symmetrical square hole, screw rod bushing
It is fixedly connected with screw rod pump case by convex block and cooperatively forming for square hole, symmetrical disengaging oilhole is provided on screw rod bushing.
The bearing is the angular contact ball bearing used in pairs, to realize the radial positioning and axially loaded of components
Balance.
The utility model has the following beneficial effects: the reciprocating rotary spiral shell provided by the utility model based on the driving of sucker rod pumping bar
Bar pumps, and is made of in structure helicoidal gear and reciprocating rotation screw pump, helicoidal gear is by ball spline linear guide
Secondary and ball helical gearing pair is constituted；Ball spline line slideway auxiliary returns pearl reverser, ball, ball spiral shell by spline housing, ball
Spin axis and axial baffle connect and compose, and ball helical gearing pair returns pearl reverser, ball, ball screw axis by screw-casing, ball
And circumferential baffle connects and composes, reciprocating rotation screw pump is by gear set, check valve, female rotor, male rotor, screw rod bushing, axis
Socket end lid, gearbox seals end cap and bearing connect and compose；By using there is the excellent of bar oil recovery technique and screw pump oil production technology
Point also has other than being adapted to the when oil exploitation of high-moisture of high viscosity, high sand content, high oil gas with screw pump
The adaptable and service life for having bar plunger pump to recover the oil is long, and the feature that can be used for deep-well oil-extraction etc., and each opposite in direct rotary mechanism
It is rolling friction pair between component, therefore its mechanical efficiency can be improved, Pumping action can be achieved in screw rod dextrorotation and derotation, significantly
Improve production efficiency.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram.
Fig. 2 is the helicoidal gear enlarged structure schematic diagram in Fig. 1 at A.
Fig. 3 is the oil circuit schematic diagram of reciprocating rotation screw pump in the utility model.
Fig. 4 is the schematic diagram of the section structure in the direction B-B in Fig. 1.
Fig. 5 is the schematic diagram of the section structure in the direction C-C in Fig. 1.
In figure: screw rod pump case 1, soket head cap screw 2, hex nut 3, gear set 4, bushing 5, bearing (ball) cover 6, bearing 7,
Oil sealing 8, gearbox seals end cap 9, check valve 10, sealing block 11, spool baffle 12, screw rod bushing 13, female rotor 14, male rotor
15, bearing output end cap 16, splined couplers 17, spline spiral countershaft set 18, ball screw axis 19, ball return pearl reverser
20, sealing baffle 21, screw-casing 22, circumferential baffle 23, axial baffle 24, spline housing 25, screw 26, straight pin 27, spool 28,
Sucker rod 29.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figs. 1-5, the reciprocating rotation screw pump based on the driving of sucker rod pumping bar, including outside sucker rod 29, screw pump
The oil inlet on screw rod pump case 1 is arranged in shell 1；Reciprocating rotation screw pump is by helicoidal gear and reciprocating rotation screw pump
Composition；
Helicoidal gear is made of ball spline line slideway auxiliary and ball helical gearing pair；Ball spline linear guide
Pair is returned pearl reverser 20, ball, ball screw axis 19 and axial baffle 24 and is connected and composed by spline housing 25, ball, spline housing 25
It forms spline with ball screw axis 19 to connect, spline housing 25 forms circumferentially fixed company by soket head cap screw 2 and screw rod pump case 1
It connects, axial baffle 24 connects the two sides that spline housing 25 is arranged in；The ball helical gearing pair is anti-by screw-casing 22, ball time pearl
It is connected and composed to device 20, ball, ball screw axis 19 and circumferential baffle 23, screw-casing 22 and ball screw axis 19 are formed and be driven
Connection, screw-casing 22 are cooperatively connected by bearing 7 and screw rod pump case 1, and the outer of the screw-casing 22 is arranged in circumferential baffle 24
Side；The sucker rod 29 is connected and fixed by screw thread and straight pin 27 with ball screw axis 19, and the ball screw axis 19 is being taken out
It does reciprocating linear motion under the drive of beam hanger 29；The outer surface of ball screw axis 19 is equipped with ball straight trough and ball screw slot, flower
The inner surface of key set 25 and screw-casing 22 is equipped with identical ball straight trough and ball screw slot and is recycled with the inside for realizing ball, rolling
One end that pearl returns pearl reverser 20 is equipped with bead returning groove, to realize the outer loop of ball；The reciprocating linear of ball screw axis 19 is transported
Dynamic that screw-casing 22 and spline spiral countershaft set 18 is driven to rotate, helicoidal gear passes through bearing 7 and screw rod pump case 1
It is cooperatively connected；
Reciprocating rotation screw pump is by gear set 4, check valve 10, female rotor 14, male rotor 15, screw rod bushing 13, bearing end
Lid 6, gearbox seals end cap 9 and bearing 7 connect and compose；The input shaft end of female rotor 14 and male rotor 15 is arranged in gear set 4
On, gear set 4 is connected by key to be formed circumferentially fixed with yin, yang rotor, and is formed by hex nut 3 and bushing 5 axial solid
Fixed, the shaft end of bushing 5 is arranged in bearing 7, and the shaft end of bearing 7 is arranged in bearing (ball) cover 6, and bearing (ball) cover 6 passes through soket head cap screw 2
It is connected and fixed with screw rod pump case 1, gearbox seals end cap 9 is fitted tightly over the end face of bearing (ball) cover 6, gearbox seals end cap
The oil sealing 8 connecting with yin, yang rotor seal is equipped in 9；The outside of female rotor 14 and male rotor 15, spiral shell is arranged in screw rod bushing 13
Bushing 13 and female rotor 14, male rotor 15 form chamber, and screw rod bushing 13 is fixedly connected with screw rod pump case 1, screw rod
Bushing 13 is equipped with disengaging oilhole, and the two sides of screw rod bushing 13 are equipped with check valve 10, and check valve 10 is by valve body, spool 28 and valve
Core baffle 12 is constituted, and sealing block 11 is equipped between check valve 10 and screw rod pump case 1, and spool baffle 12 is arranged in 10 He of check valve
Between screw rod bushing 13, the output end of male rotor 15 is connected by splined couplers 17 with spline spiral countershaft set 18.
As shown in Figs. 1-5, the reciprocating rotation screw pump based on the driving of sucker rod pumping bar, sucker rod 29 are hollow structure, by
Power source drive moves in a straight line；19 head of ball screw axis is in screwed frustum cone structure；Spline spiral countershaft set 18 with
It is equipped with sealing baffle 21 between screw rod pump case 1, realizes that sealing prevents the entrance of dust by sealing baffle 21；Oil inlet is in phase
Mutually it is symmetricly set on screw rod pump case 1；13 outer surface of screw rod bushing be equipped with symmetrical convex block, screw rod pump case 1 be equipped with pair
The square hole of title, screw rod bushing 13 is fixedly connected with screw rod pump case 1 by convex block and cooperatively forming for square hole, on screw rod bushing 13
It is provided with symmetrical disengaging oilhole；Bearing 7 is the angular contact ball bearing used in pairs, with realize components radial positioning and
Axially loaded balance.
As shown in Figs. 1-5, the reciprocating rotation screw pump based on the driving of sucker rod pumping bar is divided into two strokes up and down, specific mistake
Journey is as follows:
(1) upstroke
When sucker rod 29 moves upwards, by the conversion of ball spline line slideway auxiliary, so that spline spiral axis 19 is done
Linear motion, drives spline spiral countershaft set 18 to rotate counterclockwise, and drives screw rod male rotor 15 to do by splined couplers 17
Rotation counterclockwise, and torque is transmitted to screw rod female rotor 14 by gear pair, so that female rotor 14 rotates clockwise, due to
The engagement of yin-yang rotor squeezes air, so that the two chambers up and down between screw rod shell 1 and screw rod bushing 13 generate centainly
Pressure difference, upper chamber generates low pressure, lower chambers high pressure at this time, and the spool 1 under low-pressure state is opened, and spool 4 is closed, oil liquid
Enter from valve core 1 through oil inlet, and pass through chamber, lower chambers is squeezed by the engagement of yin-yang rotor, from lower chambers
Spool 3 outflow enter public chamber, flow through helicoidal gear part oil circuit outflow acquisition.
(2) down stroke
When sucker rod 29 moves downward, by ball spline line slideway auxiliary and ball helical gearing pair, spline is realized
Screw pair axle sleeve 18 rotates clockwise, and drives screw rod male rotor 15 to rotate clockwise by splined couplers 17, gear passes
It is dynamic to realize that female rotor 14 does rotation counterclockwise, realize that yin-yang rotor engagement squeezes air so that screw rod shell and screw rod bushing it
Between upper chamber generate high pressure, lower chambers low pressure, so that spool 2 and spool 4 are opened, spool 1 and spool 3 are closed, oil liquid pass through into
Hydraulic fluid port enters from spool 2, flows through chamber, is squeezed into upper chamber by the engagement of yin-yang rotor, flows out from spool 4 and enters public affairs
Chamber altogether flows through the public oil circuit outflow acquisition of helicoidal gear part.
Claims (7)
1. based on the reciprocating rotation screw pump of sucker rod pumping bar driving, including sucker rod (29), screw rod pump case (1), setting exist
Oil inlet on screw rod pump case (1)；It is characterized by: the reciprocating rotation screw pump is by helicoidal gear and reciprocating rotary
Screw pump composition；
The helicoidal gear is made of ball spline line slideway auxiliary and ball helical gearing pair；The ball spline straight line
Guideway returns pearl reverser (20), ball, ball screw axis (19) and axial baffle (24) by spline housing (25), ball and connects structure
At the spline housing (25) forms spline with ball screw axis (19) and connect, and the spline housing (25) passes through soket head cap screw (2)
Circumferentially fixed connection is formed with screw rod pump case (1), axial baffle (24) connection is arranged the two of the spline housing (25)
Side；The ball helical gearing pair by screw-casing (22), ball return pearl reverser (20), ball, ball screw axis (19) and
Circumferential baffle (23) connects and composes, and the screw-casing (22) forms screw with ball screw axis (19) and connect, the spiral
It covers (22) to be cooperatively connected by bearing (7) and screw rod pump case (1), the circumferential direction baffle (24) is arranged in the screw-casing (22)
Outside；The sucker rod (29) is connected and fixed by screw thread and straight pin (27) with ball screw axis (19), the ball spiral shell
Spin axis (19) does reciprocating linear motion under the drive of sucker rod (29)；The outer surface of the ball screw axis (19) is equipped with ball
The inner surface of straight trough and ball screw slot, the spline housing (25) and screw-casing (22) is equipped with identical ball straight trough and ball spiral shell
Spin slot is recycled with the inside for realizing ball, and one end that the ball goes back to pearl reverser (20) is equipped with bead returning groove, to realize ball
Outer loop；The linear reciprocating motion of the ball screw axis (19) drives screw-casing (22) and spline spiral countershaft set (18) to make
Rotary motion, the helicoidal gear are cooperatively connected by bearing (7) and screw rod pump case (1)；
The reciprocating rotation screw pump is by gear set (4), check valve (10), female rotor (14), male rotor (15), screw rod bushing
(13), bearing (ball) cover (6), gearbox seals end cap (9) and bearing (7) connect and compose；The gear set (4) is arranged in the yin
On the input shaft end of rotor (14) and male rotor (15), the gear set (4) is connected by key to be formed circumferentially admittedly with yin, yang rotor
Fixed, and form axial restraint by hex nut (3) and bushing (5), the bearing (7) is arranged in the shaft end of bushing (5), described
Bearing (ball) cover (6) setting passes through soket head cap screw (2) and screw rod pump case in the shaft end of bearing (7), the bearing (ball) cover (6)
(1) it is connected and fixed, the gearbox seals end cap (9) is fitted tightly over the end face of bearing (ball) cover (6), the gearbox seals end
The oil sealing (8) connecting with yin, yang rotor seal is equipped in lid (9)；The screw rod bushing (13) is arranged in the female rotor (14)
With the outside of male rotor (15), the screw rod bushing (13) and female rotor (14), male rotor (15) form chamber, the spiral shell
Bushing (13) is fixedly connected with screw rod pump case (1), and the screw rod bushing (13) is equipped with disengaging oilhole, the screw rod bushing
(13) two sides are equipped with check valve (10), and the check valve (10) is made of valve body, spool (28) and spool baffle (12), institute
It states and is equipped with sealing block (11) between check valve (10) and screw rod pump case (1), spool baffle (12) setting is described unidirectional
Between valve (10) and screw rod bushing (13), the output end of the male rotor (15) passes through splined couplers (17) and the spline spiral shell
Rotation countershaft set (18) is connected.
2. the reciprocating rotation screw pump according to claim 1 based on the driving of sucker rod pumping bar, it is characterised in that: the pumping
Beam hanger (29) is hollow structure, is moved in a straight line by power source drive.
3. the reciprocating rotation screw pump according to claim 1 based on the driving of sucker rod pumping bar, it is characterised in that: the rolling
Pearl helical axis (19) head is in screwed frustum cone structure.
4. the reciprocating rotation screw pump according to claim 1 based on the driving of sucker rod pumping bar, it is characterised in that: the flower
Sealing baffle (21) are equipped between key screw pair axle sleeve (18) and screw rod pump case (1), is realized and is sealed by sealing baffle (21)
Prevent the entrance of dust.
5. it is according to claim 1 based on sucker rod pumping bar driving reciprocating rotation screw pump, it is characterised in that: it is described into
Hydraulic fluid port is in be symmetrically set on screw rod pump case (1).
6. the reciprocating rotation screw pump according to claim 1 based on the driving of sucker rod pumping bar, it is characterised in that: the spiral shell
Bushing (13) section is integrally in " 8 " font, and the upper and lower surface of screw rod bushing is symmetrically arranged with convex block, screw rod pump case (1) it is interior
Surface is equipped with symmetrical square hole, and screw rod bushing (13) and screw rod pump case (1) cooperatively form fixed company by convex block and square hole
It connects, symmetrical disengaging oilhole is provided on screw rod bushing (13).
7. the reciprocating rotation screw pump according to claim 1 based on the driving of sucker rod pumping bar, it is characterised in that: the axis
Holding (7) is the angular contact ball bearing used in pairs, to realize the radial positioning and axially loaded balance of components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447610.6U CN208718914U (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447610.6U CN208718914U (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208718914U true CN208718914U (en) | 2019-04-09 |
Family
ID=65981067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821447610.6U Withdrawn - After Issue CN208718914U (en) | 2018-09-04 | 2018-09-04 | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208718914U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869273A (en) * | 2018-09-04 | 2018-11-23 | 扬州大学 | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar |
| CN113162355A (en) * | 2021-04-22 | 2021-07-23 | 苏州大学 | Permanent magnet synchronous submersible motor based on screw pump |
-
2018
- 2018-09-04 CN CN201821447610.6U patent/CN208718914U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869273A (en) * | 2018-09-04 | 2018-11-23 | 扬州大学 | Reciprocating rotation screw pump based on the driving of sucker rod pumping bar |
| CN108869273B (en) * | 2018-09-04 | 2024-02-27 | 扬州大学 | Reciprocating rotary screw pump driven by sucker rod with rod |
| CN113162355A (en) * | 2021-04-22 | 2021-07-23 | 苏州大学 | Permanent magnet synchronous submersible motor based on screw pump |
| CN113162355B (en) * | 2021-04-22 | 2023-06-23 | 苏州大学 | Screw pump-based permanent magnet synchronous submersible motor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190409 Effective date of abandoning: 20240227 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190409 Effective date of abandoning: 20240227 |