CN101672173A - Dual horsehead fine balance energy-saving walking beam pumping unit - Google Patents
Dual horsehead fine balance energy-saving walking beam pumping unit Download PDFInfo
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- CN101672173A CN101672173A CN200910066003A CN200910066003A CN101672173A CN 101672173 A CN101672173 A CN 101672173A CN 200910066003 A CN200910066003 A CN 200910066003A CN 200910066003 A CN200910066003 A CN 200910066003A CN 101672173 A CN101672173 A CN 101672173A
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- 238000005086 pumping Methods 0.000 title claims abstract description 33
- 230000009977 dual effect Effects 0.000 title claims abstract description 16
- 241001023788 Cyttus traversi Species 0.000 claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 230000003139 buffering effect Effects 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The invention discloses a dual horsehead fine balance energy-saving walking beam pumping unit comprising a waling beam assembly, a bracket assembly, a power assembly and a brake assembly. The middle part of the walking beam assembly is articulated with the upper end of the bracket assembly through a central bearing base; the front and rear ends of the walking beam assembly are respectively connected with a front horsehead and a rear horsehead; the front and rear horseheads are respectively connected with one end of a hauling steel rope; the other end of the hauling steel rope is respectively connected with a reel of the power assembly; the front horsehead is provided with a rope hanger, and the rear horsehead is provided with a balance block; the bracket assembly is provided with a tensionmechanism assembly and a buffer mechanism assembly; and the steel rope winds through the tension mechanism assembly and the buffer mechanism assembly to realize tension and buffer. The invention solves the problems of much material consumption of the regular beam-pumping unit and large impact load of a vertical pumping unit, and the like, has reasonable design, realizes remote control, monitors the parameter variation of the pumping unit at any time and ensures favorable social and economic benefits.
Description
One. technical field:
The present invention relates to a kind of oil pumper, particularly relate to dual horsehead fine balance energy-saving walking beam pumping unit.
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.Existing beam pumping unit build is big, and consumptive material is many, and it is bigger to consume energy.Though the vertical oil-pumping machine floor space is little, superficial phenomenon is energy-conservation; But shock loading is bigger, and is bigger to sucker rod, oil well pump damaged condition, mostly is uniform motion in motion process, and its characteristics of motion makes that load can not even variation in the oil well pump oil pumping working cycles process.
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 and compact for structure, can reach accurate balance, energy consumption is low and the dual horsehead fine balance energy-saving walking beam pumping unit of long service life.
Technical scheme of the present invention: a kind of dual horsehead fine balance energy-saving walking beam pumping unit, contain walking beam assembly, bracket assembly, base assembly, power assembly and brake assembly, described walking beam assembly middle part is hinged by axis of centres bearing and described bracket assembly upper end, the forward and backward two ends of described walking beam assembly are connected with forward and backward horse head respectively, described forward and backward horse head is connected with an end of haulage cable respectively, and the other end of described haulage cable is connected with the reel of power assembly respectively; Horse head is provided with polished rod eye before described, and described back horse head is provided with balance weight; Strainer assembly and buffer gear assembly are installed on the described base assembly, and described wire rope passes through from described strainer assembly and the winding of buffer gear assembly, realizes tensioning and buffering.
Described power assembly contains motor, reel, brake and controller, described reel suit is fixed on the main shaft middle part, described main shaft is installed on the described base assembly by two bearings and bearing support, the one end is equipped with big belt pulley, the other end is equipped with braked wheel, and described big belt pulley is connected with small belt pulley on being installed in described motor output shaft by belt, and described motor is installed on the described base assembly, described braked wheel matches with described brake, and described motor is connected with controller.
Be provided with cannelure in the middle of the described reel outer round surface, be respectively arranged with the screw-type steel wire rope groove on the reel external surface of this cannelure the right and left, and, the reel external surface on this cannelure left side is provided with left hand thread formula steel wire rope groove, the reel external surface on its right is provided with right-handed thread formula steel wire rope groove, wire rope is fixed on the reel, and is wrapped on the reel along the screw-type steel wire rope groove.
Described motor is a switched reluctance machines, described brake is a liquid braking device, described steel wire rope groove is the bifilar helix groove, 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, and the hand-held programmer gets final product the duty of remote wireless control oil pumper.
Described strainer assembly contains wheel carrier and regulating wheel, wherein, described wheel carrier one end is connected with described tension wheel shaft, its other end and described base assembly are hinged, and described wheel carrier is connected with described base assembly by the open type wire tensioner, described open type wire tensioner can described wheel carrier the angle of inclination, so that the adjusting tensile force, described regulating wheel is fixed on the tension wheel shaft by the bearing suit, and its outer round surface is provided with the wire rope helicla flute.
Described buffer gear assembly contains bumper bracket and buffering wheel, described bumper bracket is connected with the buffering wheel shaft, described buffering wheel is fixed on the buffering wheel shaft by the bearing suit, its outer round surface is provided with steel wire rope groove, described bumper bracket is provided with directive wheel, be convenient to move around on the column of described base assembly, this column is provided with corresponding race guide rail, and the buffer gear assembly is fixed on the described column of base assembly by the directive wheel suit.
Described balance weight is a fabricated structure, is formed by connecting by a plurality of balancing weights, can increase and decrease; Described forward and backward horse head is the truss structure with tear resistance.
Described wire rope is eight, forward and backward horse head respectively distributes four, and per two and be one group, the two ends of four wire rope that preceding horse head distributes are connected with described reel with preceding horse head extrados respectively, and four wire rope two ends of back horse head distribution are connected with reel with back horse head extrados respectively.
Described balance weight is provided with guide wheel, and this guide wheel and guide rail are complementary, and described guide rail lower end is connected with described base assembly by bottom girder, and its upper end is connected with described bracket assembly upper end by the guide rail beam stull.
Beneficial effect of the present invention:
1, the present invention adopts two horse head patterns to be convenient to accurate balance, thereafter the cambered surface center of circle of horse head overlaps with the oscillation center of walking beam, and hang with counterweight block, this balance mode makes the fractional load of suspension point and the weight of balance weight be born by structural member walking beam, bearing, the suffered supporting force of support reduces, transverse load more significantly reduces, thereby reduces the load of being born of power-transmitting part, thereby has improved application life and reliability; In addition, balance weight is divided into size block, can increase and decrease, and can reach accurate adjustment, and balance weight can be built junk, and cost is low and increase and decrease is convenient.
2, the present invention is provided with guide rail, the directive wheel that balance weight is provided with matches with this guide rail, can vertical up-or-down movement, avoided balance weight to carry the swing that causes because of circular runout or the excessive wind of horse head cambered surface, and make it be in the plumb position with the guide rail beam stull, reduce the influence of balance weight swing to oil pumper.
3, the present invention is direct driving force with the motor, and its output torque is bigger, but power requirement is less, thereby has reduced electric energy loss.And switched reluctance machines has further increased output torque, by being transferred on the reel of axle after output torque slows down once more by belt pulley.It is P that reel is provided with pitch, and helical pitch is L, and left end is left-handed, and right-hand member is the screw thread traction steel wire grooving of dextrorotation, and haulage cable twines along thread groove and drops the oil pumper running on the reel, and during work, when the A end twined cylinder, the B end withdrawed from gradually from cylinder; Opposite action is arranged with it when returning stroke, and motion freely.In addition, the haulage cable two ends directly are connected with two horse heads respectively, and haulage cable is along the cambered surface running of horse head, and on the tangent line of horse head cambered surface, the stressed arm of force is to equate forever to the origin of force of haulage cable, so good energy-conserving effect forever.
4, horse head of the present invention adopts the truss structure with tear resistance, and its long service life has reduced maintenance and changed frequency, reduces use cost and improves pumping efficiency; Adopt liquid braking device to make pumping-unit motor outage back Braking mode, the steady and good braking effect of braking in addition.
5, the present invention adjusts the degree of tightness situation of dragging the haulage cable that draws the oil pumper motion in order to be more convenient for, so added strainer in mechanism.In addition, drag the haulage cable that draws oil pumper motion during commutation because the elasticity of itself has instant pine and rises; In order to alleviate this impact to influence steel wire and complete machine, increased buffer gear, make haulage cable be in tensioning state constantly.
6, 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.For example will adopt the 3.8m stroke, 4 jig frequencies only need a long way off this parameter input controller to be got final product, and can join by stepless accent, no longer need manually to adjust parameter.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; Autostop when oil pumper transships is controlled conveniently, and is safe.
7, the present invention's compactness rational in infrastructure, it need not reducer slows down, and has deleted reducer; In addition, adopt the straight line transmission, eliminated linkage, thereby its in light weight and good energy-conserving effect, under same operating mode than conventional pumping unit weight saving 30-50%; Reduce 30-50% than the conventional pumping unit power consumption.
8, the present invention adopts the PLC programmable logic controller, accurately the oil pumping of control oil pumper is dynamic, and it is reasonable in design, noise is low, easy making, versatility is good, applicability is strong, is applicable to the oil pumping work under any working environment in land, be easy to promote, society and economic benefit are good.
Four. description of drawings:
Fig. 1 is the structural representation of intelligent beam-pumping unit;
Fig. 2 is the enlarged drawing of buffer gear assembly shown in Figure 1;
Fig. 3 is the left view of buffer gear assembly shown in Figure 2;
Fig. 4 is the vertical view of buffer gear assembly shown in Figure 2;
Fig. 5 is the structural representation of power assembly shown in Figure 1;
Fig. 6 is the structural representation of reel shown in Figure 5;
Fig. 7 is the right view of reel shown in Figure 6;
Fig. 8 is the enlarged drawing of strainer assembly shown in Figure 1;
Fig. 9 is the left view of strainer assembly shown in Figure 8.
Five. the specific embodiment:
Embodiment: referring to Fig. 1-Fig. 9, among the figure, 1-dynamic ropes joint, 2-dynamic ropes, the 3-polished rod eye, 4-polished rod clamp, horse head before the 5-lifting rope, 6-, the 7-bracket assembly, 8-rack platform, 9-hanging ladder, 10-walking beam assembly, 11-axis of centres bearing, horse head behind the 12-, 13-horse head pin, the stull of 14-guide rail beam, the 15-counterweight, 16-guide rail, 17-base assembly, 18-power assembly, 19-buffer gear assembly, 20-strainer assembly, the 21-bumper bracket, 22-cushions wheel shaft, the 23-bearing cover, 24-bearing, 25-buffering wheel, 26-directive wheel, the 31-main shaft, 32-bearing support, 33-braked wheel, 34-liquid braking device, the combination of 35-round nut, 36-reel, 37-big belt pulley, the combination of 38-round nut, 39-belt, 40-high pulling torque motor, the 41-wheel carrier, 42-regulating wheel, 43-lubricating cup, the 44-tension wheel shaft, 45-bearing, 46-open type wire tensioner.
Be provided with cannelure in the middle of reel 36 outer round surface, be respectively arranged with the screw-type steel wire rope groove on reel 36 external surfaces of this cannelure the right and left, and, reel 36 external surfaces on this cannelure left side are provided with left hand thread formula steel wire rope groove, reel 36 external surfaces on its right are provided with right-handed thread formula steel wire rope groove, wire rope 2 is eight, each four of front and back, and two and be one group.One end of eight wire rope is separately fixed on the reel 36, and is wrapped in respectively in the both sides steel wire rope groove of reel 36, and the other end of eight wire rope 2 is connected with the extrados of preceding horse head 6 and the extrados of back horse head 12 respectively.
As required, motor 40 adopts switched reluctance machines, brake adopts liquid braking device, steel wire rope groove is the bifilar helix groove, 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.
Preceding horse head 6 and back horse head 12 are to equate that fully their center of arc is at same center, and their center is axis of centres bearing 11 centers just; They were around 11 motions of the axis of centres bearing when motion was.Power assembly 18 drives haulage cable 2 actions when coming and going running, because of wire rope 2 connects with horse head, thereby also just driven horse head and start working.When motor 40 was just changeing, haulage cable 2 drove back horse head 12 and falls, and horse head 6 drive down-hole load rise before making; When motor 40 counter-rotatings, horse head 6 fell before haulage cable 2 drove, and made back horse head 12 drive counterweight and rose; Oil pumper has been finished the process of whole oil pumping.Strainer 20 has played the effect of tensioning haulage cable 2, and buffer gear assembly 19 has played the instant reversing impact that buffer rope produces when commutation.
Switched reluctance machines has further increased output torque after output torque slows down once more by belt; By being transferred on the reel 36 of main shaft 31.Reel 36 as shown in Figure 7, it is P for pitch, helical pitch is L, left end is left-handed, right-hand member is the screw steel wire grooving of dextrorotation.Wire rope 2 is fixed on the reel 36, and twines on the reel 36 along thread groove.Wire rope 2 twines reel 36 along thread groove during work, and when the A end twined cylinder, the B end withdrawed from gradually from cylinder; Opposite action is arranged with it when returning stroke.The moment of torsion that acts on reel becomes following relationship with the wire rope power output:
F reel power output
K acts on the moment of torsion on the cylinder
The D drum diameter
This moment, reel 36 power outputs were shown in above-mentioned formula.For example act on the moment of torsion 3000Nm of reel 36, barrel dliameter is 400mm, and then reel 36 power outputs are 15000N.As seen this moment, power output was big, was feasible with motor 40 as driving directly therefore.Fix and twined wire rope 2 on the reel 36, wire rope 2 drops the oil pumper running.Wire rope 2 has directly connected the extrados of preceding horse head 6 and back horse head 12, this wire rope 2 turns round along the horse head extrados, on the tangent line of horse head cambered surface, the stressed arm of force equates that this is normal relatively another energy-conservation main factor of beam pumping unit to the origin of force of wire rope 2 forever.Liquid braking device is to be used for complete machine braking use, and pumping-unit motor outage back Braking mode.
Change power assembly concrete structure, change the strainer assembly concrete structure, change the concrete structure of buffer gear assembly, and the concrete structure that changes horse head can form a plurality of embodiment, is common variation of the present invention, do not describe in detail one by one at this.
Claims (9)
1. dual horsehead fine balance energy-saving walking beam pumping unit, contain walking beam assembly, bracket assembly, base assembly, power assembly and brake assembly, described walking beam assembly middle part is hinged by axis of centres bearing and described bracket assembly upper end, it is characterized in that: the forward and backward two ends of described walking beam assembly are connected with forward and backward horse head respectively, described forward and backward horse head is connected with an end of haulage cable respectively, and the other end of described haulage cable is connected with the reel of power assembly respectively; Horse head is provided with polished rod eye before described, and described back horse head is provided with balance weight; Strainer assembly and buffer gear assembly are installed on the described base assembly, and described wire rope passes through from described strainer assembly and the winding of buffer gear assembly, realizes tensioning and buffering.
2. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 1, it is characterized in that: described power assembly contains motor, reel, brake and controller, described reel suit is fixed on the main shaft middle part, described main shaft is installed on the described base assembly by two bearings and bearing support, the one end is equipped with big belt pulley, the other end is equipped with braked wheel, described big belt pulley is connected with small belt pulley on being installed in described motor output shaft by belt, described motor is installed on the described base assembly, described braked wheel matches with described brake, and described motor is connected with controller.
3. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 2, it is characterized in that: be provided with cannelure in the middle of the described reel outer round surface, be respectively arranged with the screw-type steel wire rope groove on the reel external surface of this cannelure the right and left, and, the reel external surface on this cannelure left side is provided with left hand thread formula steel wire rope groove, the reel external surface on its right is provided with right-handed thread formula steel wire rope groove, wire rope is fixed on the reel, and is wrapped on the reel along the screw-type steel wire rope groove.
4. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 3, it is characterized in that: described motor is a switched reluctance machines, described brake is a liquid braking device, described steel wire rope groove is the bifilar helix groove, 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.
5. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 1, it is characterized in that: described strainer assembly contains wheel carrier and regulating wheel, wherein, described wheel carrier one end is connected with described tension wheel shaft, its other end and described base assembly are hinged, and, described wheel carrier is connected with described base assembly by the open type wire tensioner, described open type wire tensioner can described wheel carrier the angle of inclination, so that adjusting tensile force, described regulating wheel is fixed on the tension wheel shaft by the bearing suit, and its outer round surface is provided with the wire rope helicla flute.
6. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 1, it is characterized in that: described buffer gear assembly contains bumper bracket and buffering wheel, described bumper bracket is connected with the buffering wheel shaft, described buffering wheel is fixed on the buffering wheel shaft by the bearing suit, its outer round surface is provided with steel wire rope groove, described bumper bracket is provided with directive wheel, be convenient on the column of described base assembly, move around, this column is provided with corresponding race guide rail, and the buffer gear assembly is fixed on the described column of base assembly by the directive wheel suit.
7. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 1 is characterized in that: described balance weight is a fabricated structure, is formed by connecting by a plurality of balancing weights, can increase and decrease; Described forward and backward horse head is the truss structure with tear resistance.
8. dual horsehead fine balance energy-saving walking beam pumping unit according to claim 1, it is characterized in that: described wire rope is eight, forward and backward horse head respectively distributes four, and per two and be one group, the two ends of four wire rope that preceding horse head distributes are connected with described reel with preceding horse head extrados respectively, and four wire rope two ends that back horse head distributes are connected with reel with back horse head extrados respectively.
9. according to the arbitrary described dual horsehead fine balance energy-saving walking beam pumping unit of claim 1-8, it is characterized in that: described balance weight is provided with guide wheel, this guide wheel and guide rail are complementary, described guide rail lower end is connected with described base assembly by bottom girder, and its upper end is connected with described bracket assembly upper end by the guide rail beam stull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100660034A CN101672173B (en) | 2009-08-31 | 2009-08-31 | Dual horsehead fine balance energy-saving walking beam pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100660034A CN101672173B (en) | 2009-08-31 | 2009-08-31 | Dual horsehead fine balance energy-saving walking beam pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101672173A true CN101672173A (en) | 2010-03-17 |
| CN101672173B CN101672173B (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100660034A Expired - Fee Related CN101672173B (en) | 2009-08-31 | 2009-08-31 | Dual horsehead fine balance energy-saving walking beam pumping unit |
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| CN (1) | CN101672173B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453795A (en) * | 2014-11-27 | 2015-03-25 | 邹庆笙 | Dustproof-big-gear balance type arch-shaped wheel frame pumping unit |
| CN105443083A (en) * | 2016-01-22 | 2016-03-30 | 金成群 | Equilibrium beam-pumping unit |
| CN105840145A (en) * | 2015-01-13 | 2016-08-10 | 中国石油天然气股份有限公司 | Switched reluctance motor direct-drive oil production device |
| CN111577219A (en) * | 2020-04-17 | 2020-08-25 | 新疆维吾尔自治区第三机床厂 | Counter weight guide type double-horsehead oil pumping unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3971213A (en) * | 1973-04-30 | 1976-07-27 | Kelley Robert K | Pneumatic beam pumping unit |
| CN1095453A (en) * | 1993-05-21 | 1994-11-23 | 汪朴澄 | Towed moment-changing beam-balanced pumping unit |
| CN2430555Y (en) * | 2000-04-25 | 2001-05-16 | 关宝文 | Double head beam direction variable oil pump machine |
| CN1391028A (en) * | 2002-06-20 | 2003-01-15 | 郭兆勇 | Pumping unit with three-segment moving beam |
| CN2773309Y (en) * | 2004-05-11 | 2006-04-19 | 陈天为 | Intelligent linear beam pumping unit |
| CN201460828U (en) * | 2009-08-31 | 2010-05-12 | 濮阳市双发实业有限责任公司 | Precise balance and energy saving type beam pumping unit with double horse heads |
-
2009
- 2009-08-31 CN CN2009100660034A patent/CN101672173B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453795A (en) * | 2014-11-27 | 2015-03-25 | 邹庆笙 | Dustproof-big-gear balance type arch-shaped wheel frame pumping unit |
| CN105840145A (en) * | 2015-01-13 | 2016-08-10 | 中国石油天然气股份有限公司 | Switched reluctance motor direct-drive oil production device |
| CN105443083A (en) * | 2016-01-22 | 2016-03-30 | 金成群 | Equilibrium beam-pumping unit |
| CN105443083B (en) * | 2016-01-22 | 2017-08-25 | 金成群 | Dynamic balance beam pumping unit |
| CN111577219A (en) * | 2020-04-17 | 2020-08-25 | 新疆维吾尔自治区第三机床厂 | Counter weight guide type double-horsehead oil pumping unit |
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| Publication number | Publication date |
|---|---|
| CN101672173B (en) | 2012-07-11 |
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Owner name: HENAN SHUANGFA OIL EQUIPMENT MANUFACTURING CO., LT Free format text: FORMER NAME: PUYANG CITY SHUANGFA INDUSTRY CO., LTD. |
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Address after: 457000 the Yellow River Road, Henan, Puyang Patentee after: HENAN SHUANGFA PETROLEUM EQUIPMENT MANUFACTURING Corp. Address before: 457000 the Yellow River Road, Henan, Puyang Patentee before: PUYANG CITY SHUANGFA INDUSTRY Co.,Ltd. |
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Granted publication date: 20120711 |