CN101963053A - Power assembly of positioning and reversing pumping unit - Google Patents
Power assembly of positioning and reversing pumping unit Download PDFInfo
- Publication number
- CN101963053A CN101963053A CN2010105029830A CN201010502983A CN101963053A CN 101963053 A CN101963053 A CN 101963053A CN 2010105029830 A CN2010105029830 A CN 2010105029830A CN 201010502983 A CN201010502983 A CN 201010502983A CN 101963053 A CN101963053 A CN 101963053A
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- Prior art keywords
- cannelure
- oil pumper
- reel
- crank
- suspender belt
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- 238000005086 pumping Methods 0.000 title claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Abstract
The invention discloses a power assembly of a positioning and reversing pumping unit, which comprises a motor, a controller, a reel, a speed reducer and a manual brake mechanism, wherein the reel is sheathed and fixed on a main shaft, and both ends of the main shaft are installed on a pedestal of a tower type pumping unit through a bearing and a bearing pedestal; the motor is connected with the controller; the outer circular surface of the reel is provided with a front hanging strip circular groove and a back hanging strip circular groove respectively, the front hanging strip circular groove is used for fixing a front hanging strip, and the back hanging strip circular groove is used for fixing a back hanging strip; one end of the main shaft is connected with one end of a crank and rocker mechanism through a speed increaser, and the other end of the crank and rocker mechanism is connected with an output shaft of the motor through the speed reducer; and the manual brake mechanism is installed on the high-speed end of the speed reducer, and the manual operating part is installed on the pedestal of the tower type pumping unit. The invention has the advantages of reasonable design, simple structure, low energy consumption, convenient operation and available mechanical reversing.
Description
One. technical field: the present invention relates to a kind of oil pumper power assembly, particularly relate to a kind of location commutation oil pumper power assembly.
Two. background technology: in the oil recovery process of oil field, oil pumper is one of oil production equipment main in the oil producing operation.The common beam oil pumper have stroke less, from deficiency such as great, that occupation of land is many, counterbalance effect is undesirable, reduction box output torque fluctuation big, efficient is low.Though the pylon oil pumper has advantages such as stroke is long, in light weight, floor space is little, energy-conservation, also there are defectives such as reversing impact is big, nothing mistake year protection, its uniform motion makes oil well pump, and load can not even variation in aspiration procedure.
Three. summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of reasonable in design, simple in structure, energy consumption is low, easy to operate and realize the location commutation oil pumper power assembly of mechanical commutation.
Technical scheme of the present invention is: a kind of location commutation oil pumper power assembly, contain motor, controller, reel, reducer and hand-operated brake mechanism, wherein, described reel suit is fixed on the main shaft, described main shaft both ends are installed on the base of tower shelf type oil pumping machine by bearing and bearing support, described motor is connected with controller, suspender belt cannelure and back strap cannelure before being respectively arranged with on the described reel outer round surface, the suspender belt cannelure is used for fixing preceding suspender belt before described, described back strap cannelure is used for fixing back strap, described main shaft one end is connected with the output shaft of speed increaser by shaft coupling, the power shaft of described speed increaser is fixedlyed connected with an end of rocking bar, one end of the other end of described rocking bar and connecting rod is hinged, one end of the other end of described connecting rod and crank is hinged, the other end of described crank is fixedlyed connected with the output shaft of described reducer, described input shaft of speed reducer is connected with the output shaft of described motor, described rocking bar, connecting rod and crank constitute crank and rocker mechanism, described motor, speed increaser and reducer are installed on the described base, described hand-operated brake mechanism is installed on the speed end of described reducer, and its manual operation section is installed on the base of tower shelf type oil pumping machine.
Described motor is three asynchronous machines of Y series, described controller adopts the PLC programmable logic controller, and the oil pumping of accurately controlling oil pumper is dynamic, and this controller also is provided with wireless remote sensing system, can realize Long-distance Control, the hand-held programmer gets final product the duty of remote wireless control oil pumper.
Be respectively arranged with two preceding suspender belt cannelures and two back strap cannelures on the described reel outer round surface, the suspender belt cannelure was all fixedlyed connected with an end of a preceding suspender belt before each was described, and each described back strap cannelure is all fixedlyed connected with an end of a back strap.
Described reel is an integral structure, perhaps is split-type structural, is made up of two reel splits, is provided with described preceding suspender belt cannelure and back strap cannelure in each reel split.
Be milled with the plane on the preceding suspender belt cannelure of described reel and the outer round surface of back strap cannelure, suspender belt and back strap are fixed on this plane by bolt and pressing plate respectively before described, and the outer round surface of described pressing plate outer round surface and described preceding suspender belt cannelure and back strap cannelure is complementary.
Described speed increaser is one group of gear train that can change output speed; Described reducer is the two arc cylinder formula reducers of two-stage shunting formula.
Described motor is furnished with one group of belt pulley, and the size of change belt pulley is to change the oil pumping frequency of oil pumper; Described crank is provided with three crank pin holes, and the position of change crank-pin is to change the stroke of oil pumper.
The invention has the beneficial effects as follows:
1, the present invention adopts reel to twine suspender belt and realizes the reel reducing, during upstroke, twining on the weighting distribution wheel has expired suspender belt, and the lifting wheel suspender belt is all emitted, and causes the wheel footpath of this moment not waited, and back counterweight is big to the arm of force of bottom main shaft effect, the arm of force of front end is less, then the moment that this moment, the back counterweight produced is maximum, has reduced the moment of torsion that reducer will be exported, and has reduced the required electric weight of motor.The arm of force of counterweight is reducing after when rising, and the front end arm of force is increasing, and oil pumper is simultaneously also in unloading.Front end arm of force maximum during to top dead-centre, rear end arm of force minimum; Repeated the operating mode of top dead-centre conversely.It has all reduced the required electric current of motor last bottom dead centre, so it is energy-conservation.
2, the present invention has adopted automation control system, and this control system is provided with wireless remote sensing system, the energy Long-distance Control, and the hand-held programmer is for remote wireless control oil pumper duty provides convenience.It can also be presented at the acceleration of the electric current in the running, voltage, each point on the display screen, monitors oil pumper each side parameter constantly.Can also be provided with overcurrent protection this moment, and autostop when oil pumper transships is controlled conveniently, and is safe.
3, the present invention has adopted crank and rocker mechanism, can mechanical commutation, deleted electrical equipment commutation part, and increased the stability of electric system.Most importantly left out the frequency converter of functional performance less stable in the open air.Can realize that the suspension point zero velocity starts.The crank of crank and rocker mechanism is provided with three crank pin holes, by the position of change crank-pin, can change the stroke of oil pumper.Can prevent simultaneously the disconnected serious consequence that is caused of sucker rod effectively.When sucker rod in the well breaks bar, polished rod load reduces suddenly, even be zero, and the counterweight of back is constant, the counterweight of back can fall suddenly, if the counterweight of common tower shelf type oil pumping machine will pound, adopts this location commutation oil pumper power assembly, can stop the generation of this type of situation, because of location commutation oil pumper power assembly has crank and rocker mechanism.
4, the present invention has adopted three asynchronous machines of sturdy durable Y series, and it is furnished with one group of belt pulley, changes the size of belt pulley, can change the oil pumping frequency of oil pumper.
5, the present invention has adopted and has used hand-operated brake, and can control oil pumper has under any state and can quit work, and has made things convenient for that oil pumper adds, unloaded.
Four. description of drawings:
Fig. 1 is the structural representation of location commutation oil pumper power assembly;
Fig. 2 is the vertical view of location commutation oil pumper power assembly shown in Figure 1;
Fig. 3 is the sectional drawing of reel shown in Figure 2
Fig. 4 is preceding suspender belt winding schematic diagram when polished rod load is up;
Fig. 5 is back strap winding schematic diagram when polished rod load is up;
Fig. 6 is preceding suspender belt winding schematic diagram when polished rod load is descending;
Fig. 7 is back strap winding schematic diagram when polished rod load is descending;
Fig. 8 is the structural representation of speed increaser shown in Figure 1;
Fig. 9 is the cross-sectional view of speed increaser shown in Figure 8;
Figure 10 is the structural representation of rocking bar shown in Figure 1;
Figure 11 is the plan structure schematic diagram of rocking bar shown in Figure 10;
Figure 12 is the pin cross-sectional view of crank shown in Figure 1;
Figure 13 is the structural representation of connecting rod shown in Figure 1;
Figure 14 is the structural representation of crank shown in Figure 1;
Figure 15 is the plan structure schematic diagram of Figure 14 crank.
Five. the specific embodiment:
Embodiment: referring to Fig. 1-Figure 15, among the figure, 1-speed increaser, 2-rocking bar, 3-crank-pin, the 4-motor, 5-belt, 6-connecting rod, 7-reducer, the 8-reducer pulley, 9-bearing support, 10-bearing cover, 11-bearing, the 12-main shaft, 13-key, 14-reel, 15-bearing cover, the 16-shaft coupling, 17-motor pulley, 18-crank, 19-hand-operated brake mechanism, the 20-suspender belt, the 21-bolt, the 22-pressing plate, 23-oil is stifled, the 24-iron chips suction device, 25-gear wheel, 26-bearing cover, 27-key, the 28-bearing, 29-power shaft, the logical lid of 30-bearing, 31-idler gear, the 32-jackshaft, 33-bearing, 34-bearing cover, 35-bearing cover, the 36-output shaft, 37-bearing, 38-bearing support, 39-bearing, the 40-bearing cover, 41-end cap, 42-tapered sleeve, 43-nut, the 44-upper box, suspender belt before the 45-lower box, 46-, 47-back strap.
Location commutation oil pumper power assembly contains motor 4, controller, reel 14, reducer 7 and hand-operated brake mechanism 19, wherein, reel 14 suits are fixed on the main shaft 12, main shaft 12 both ends are installed on the base of tower shelf type oil pumping machine by bearing 11 and bearing support 9, motor 4 is connected (not drawing among the figure) with controller, suspender belt cannelure and back strap cannelure before being respectively arranged with on reel 14 outer round surface, suspender belt 46 before preceding suspender belt cannelure is used for fixing, the back strap cannelure is used for fixing back strap 47, main shaft 12 1 ends are connected with the output shaft 36 of speed increaser 1 by shaft coupling 16, the power shaft 29 of speed increaser 1 is fixedlyed connected with an end of rocking bar 2, one end of the other end of rocking bar 2 and connecting rod 6 is hinged, and (crank-pin 3 is as articulated column, concrete structure is referring to Figure 12), one end of the other end of connecting rod 6 and crank 18 is hinged, the other end of crank 18 is fixedlyed connected with the output shaft of reducer 7, the power shaft of reducer 7 is connected with the output shaft of motor 4, rocking bar 2, connecting rod 6 and crank 18 constitute crank and rocker mechanism, motor 4, speed increaser 1 and reducer 7 are installed on the base, hand-operated brake mechanism 19 is installed on the speed end of reducer 7, and its manual operation section is installed on the base of tower shelf type oil pumping machine.
Controller adopts the PLC programmable logic controller, and the oil pumping of accurately controlling oil pumper is dynamic, and this controller also is provided with wireless remote sensing system, can realize Long-distance Control, and the hand-held programmer gets final product the duty of remote wireless control oil pumper.
Two preceding suspender belts 46 are left-handed to be wrapped in the preceding suspender belt cannelure of two inboards, and two back strap 47 dextrorotation are wrapped in the back strap cannelure in two outsides, and preceding suspender belt 46 and back strap 47 oppositely are wrapped on the reel 14; Be milled with the plane on the preceding suspender belt cannelure of reel 14 and the outer round surface of back strap cannelure, preceding suspender belt 46 and back strap 47 are fixed on this plane by bolt 21 and pressing plate 22 respectively, and the outer round surface of pressing plate 22 outer round surface and preceding suspender belt cannelure and back strap cannelure is complementary.
Speed increaser 1 is one group of gear train that can change output speed, and its concrete structure does not describe in detail referring to Fig. 8 and Fig. 9; Reducer 7 is the two arc cylinder formula reducers of two-stage shunting formula.
Operating principle:
At first, the present invention has utilized the characteristic of crank and rocker mechanism, has realized the automatic reverse of oil pumper.
Moreover starting torque required for the present invention is little.The size of required starting torque during startup also is the size of the required consumed power of decision.The rule mark of mechanical commutation reducing tower shelf type oil pumping machine motion is almost identical with beam pumping unit.The motion that reduces speed now to the upstroke that motion process is that the upstroke bottom dead centre quickens to start---motion one that reduces speed now to the upstroke-beginning accelerated motion speed motion to the down stroke---goes round and begins again, and is similar to simple harmonic motion.All give long acceleration time for last bottom dead centre.
According to the characteristic of crank and rocker mechanism, when upstroke started, the speed that has just begun the speed increaser 1 stirred was very slow, it is also very little that the quilt of this moment is dragged the primer acceleration, and the fluctuation of electric current is also very little, along with the motion of crank and rocker mechanism, speed is constantly accelerated, and this moment, motor 4 was stable loading procedures.This moment is single from the motor aspect, has eliminated part and has been dragged the required energy consumption of primer momentum conversion.If allow motor 4 locate at the uniform velocity under the state always, also will allow dragged the required power of primer momentum change will be very big:
F-Mg＝MV/t
M weight quality
V weight speed
The F weight acts on power on the lifting rope
G acceleration of gravity
Required time when t reaches a constant speed
Inevitable electric current can be very big, and motor 4 in-fightings must increase.Must extend the acceleration time in order to reduce this in-fighting.In a segment distance of before top dead center, must slow down; Otherwise, when upper dead center position, can not stop oil pumper and drag primer and move upward; Crank-link mechanism has this quickreturn characteristics, can solve this problem, and motor does work to oil pumper.During down stroke, counterweight part is heavy behind the oil pumper.What oil pumper was carried is the weight difference of back counterweight and front end.That is to say that motor 4 is in the action that repeats the oil pumper upstroke.Its required electric current reduces, so it is energy-conservation on the one hand for this.
Another energy-conservation reason is: reel 14 twines suspender belts 20 realizes that reels 14 are (as the reducing of Fig. 6-Fig. 9).During upstroke, twining on the weighting distribution wheel has expired suspender belt, and the lifting wheel suspender belt is all emitted, and causes the wheel footpath of this moment not waited, and back counterweight is big to the arm of force of bottom main shaft effect, and the arm of force of front end is less.Front and back to the moment that main shaft produces are:
M
After=m
AfterG (r+n
AfterD)
M
Before=m
BeforeG (r-n
AfterD)
M
AfterThe moment that back counterweight produces on main shaft
M
BeforeThe moment that back counterweight produces on main shaft
m
AfterBack weight mass
m
BeforeDrag the primer quality
R main shaft radius
n
AfterSuspender belt twines the number of plies
D suspender belt thickness
Then the moment maximum that this moment, the back counterweight produced has reduced the moment of torsion that reducer 7 will be exported, and has reduced motor 4 required electric weight.The arm of force of rear portion counterweight is reducing when rising, and the front end arm of force is increasing, and oil pumper is simultaneously also in unloading.To top dead-centre is front end arm of force maximum, rear end arm of force minimum; Repeated the operating mode of top dead-centre conversely.It has all reduced the required electric current of motor last bottom dead centre, so it is energy-conservation.
During work, reel 14 rolls, and drives the oil pumper motion.The commutation of oil pumper reaches by crank and rocker mechanism.Be provided with three crank pin holes above the crank 18 of crank and rocker mechanism, the position of change crank-pin 3 is to change the stroke of oil pumper.Adopt three asynchronous machines of Y series, and be furnished with one group of belt pulley, the size of change belt pulley is to change the oil pumping frequency of oil pumper.
Change crank and rocker mechanism concrete structure, change the concrete structure of cylinder, and the concrete structure that changes speed increaser can form a plurality of embodiment, is common variation of the present invention, do not describe in detail one by one at this.
Claims (7)
1. locate commutation oil pumper power assembly for one kind, contain motor, controller, reel, reducer and hand-operated brake mechanism, wherein, described reel suit is fixed on the main shaft, described main shaft both ends are installed on the base of tower shelf type oil pumping machine by bearing and bearing support, described motor is connected with controller, suspender belt cannelure and back strap cannelure before being respectively arranged with on the described reel outer round surface, the suspender belt cannelure is used for fixing preceding suspender belt before described, described back strap cannelure is used for fixing back strap, it is characterized in that: described main shaft one end is connected with the output shaft of speed increaser by shaft coupling, the power shaft of described speed increaser is fixedlyed connected with an end of rocking bar, one end of the other end of described rocking bar and connecting rod is hinged, one end of the other end of described connecting rod and crank is hinged, the other end of described crank is fixedlyed connected with the output shaft of described reducer, described input shaft of speed reducer is connected with the output shaft of described motor, described rocking bar, connecting rod and crank constitute crank and rocker mechanism, described motor, speed increaser and reducer are installed on the described base, described hand-operated brake mechanism is installed on the speed end of described reducer, and its manual operation section is installed on the base of tower shelf type oil pumping machine.
2. location commutation oil pumper power assembly according to claim 1, it is characterized in that: described motor is three asynchronous machines of Y series, described controller adopts the PLC programmable logic controller, accurately the oil pumping of control oil pumper is dynamic, this controller also is provided with wireless remote sensing system, can realize Long-distance Control, the hand-held programmer gets final product the duty of remote wireless control oil pumper.
3. location commutation oil pumper power assembly according to claim 1, it is characterized in that: be respectively arranged with two preceding suspender belt cannelures and two back strap cannelures on the described reel outer round surface, the suspender belt cannelure was all fixedlyed connected with an end of a preceding suspender belt before each was described, and each described back strap cannelure is all fixedlyed connected with an end of a back strap.
4. location commutation oil pumper power assembly according to claim 3, it is characterized in that: described reel is an integral structure, perhaps be split-type structural, form, be provided with described preceding suspender belt cannelure and back strap cannelure in each reel split by two reel splits.
5. location commutation oil pumper power assembly according to claim 1, it is characterized in that: be milled with the plane on the preceding suspender belt cannelure of described reel and the outer round surface of back strap cannelure, suspender belt and back strap are fixed on this plane by bolt and pressing plate respectively before described, and the outer round surface of described pressing plate outer round surface and described preceding suspender belt cannelure and back strap cannelure is complementary.
6. location commutation oil pumper power assembly according to claim 1, it is characterized in that: described speed increaser is one group of gear train that can change output speed; Described reducer is the two arc cylinder formula reducers of two-stage shunting formula.
7. according to each described location commutation oil pumper power assembly of claim 1-6, it is characterized in that: described motor is furnished with one group of belt pulley, and the size of change belt pulley is to change the oil pumping frequency of oil pumper; Described crank is provided with three crank pin holes, and the position of change crank-pin is to change the stroke of oil pumper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010502983 CN101963053B (en) | 2010-10-12 | 2010-10-12 | Power assembly of positioning and reversing pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010502983 CN101963053B (en) | 2010-10-12 | 2010-10-12 | Power assembly of positioning and reversing pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101963053A true CN101963053A (en) | 2011-02-02 |
| CN101963053B CN101963053B (en) | 2013-09-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010502983 Active CN101963053B (en) | 2010-10-12 | 2010-10-12 | Power assembly of positioning and reversing pumping unit |
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| Country | Link |
|---|---|
| CN (1) | CN101963053B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2108486C1 (en) * | 1996-03-21 | 1998-04-10 | Александр Георгиевич Ананенков | Oil-well sucker rod pump drive |
| CN2312345Y (en) * | 1997-09-25 | 1999-03-31 | 辽河石油勘探局锦州采油厂 | Dual linkage rod and distance-increasing type beam oil pumping machine |
| CN2473357Y (en) * | 2000-10-27 | 2002-01-23 | 郭星辉 | Multiple rod linear oil pump unit |
| US20040084179A1 (en) * | 2002-11-01 | 2004-05-06 | Jeff Watson | Reciprocating pump control system |
| CN201802365U (en) * | 2010-10-12 | 2011-04-20 | 濮阳市双发实业有限责任公司 | Power assembly of oil pumping unit capable of positioning reversing |
-
2010
- 2010-10-12 CN CN 201010502983 patent/CN101963053B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2108486C1 (en) * | 1996-03-21 | 1998-04-10 | Александр Георгиевич Ананенков | Oil-well sucker rod pump drive |
| CN2312345Y (en) * | 1997-09-25 | 1999-03-31 | 辽河石油勘探局锦州采油厂 | Dual linkage rod and distance-increasing type beam oil pumping machine |
| CN2473357Y (en) * | 2000-10-27 | 2002-01-23 | 郭星辉 | Multiple rod linear oil pump unit |
| US20040084179A1 (en) * | 2002-11-01 | 2004-05-06 | Jeff Watson | Reciprocating pump control system |
| CN201802365U (en) * | 2010-10-12 | 2011-04-20 | 濮阳市双发实业有限责任公司 | Power assembly of oil pumping unit capable of positioning reversing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101963053B (en) | 2013-09-25 |
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Address after: 457000 the Yellow River Road, Henan, Puyang Applicant after: HENAN SHUANGFA PETROLEUM EQUIPMENT MANUFACTURING CORP. Address before: 457000 the Yellow River Road, Henan, Puyang Applicant before: Puyang City Shuangfa Industry Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: PUYANG CITY SHUANGFA INDUSTRY CO., LTD. TO: HENAN SHUANGFA OIL EQUIPMENT MANUFACTURING CO., LTD. |
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Denomination of invention: Power assembly of positioning and reversing pumping unit Effective date of registration: 20161011 Granted publication date: 20130925 Pledgee: Puyang City Rural Credit Cooperatives Pledgor: HENAN SHUANGFA PETROLEUM EQUIPMENT MANUFACTURING CORP. Registration number: 2016410000014 |
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Date of cancellation: 20170720 Granted publication date: 20130925 Pledgee: Puyang City Rural Credit Cooperatives Pledgor: HENAN SHUANGFA PETROLEUM EQUIPMENT MANUFACTURING CORP. Registration number: 2016410000014 |
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Denomination of invention: Power assembly of positioning and reversing pumping unit Effective date of registration: 20170724 Granted publication date: 20130925 Pledgee: Puyang City Rural Credit Cooperatives Pledgor: HENAN SHUANGFA PETROLEUM EQUIPMENT MANUFACTURING CORP. Registration number: 2017990000671 |
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