CN105019867A - Belt speed reduction type high-efficiency pumping unit with single movable pulley - Google Patents

Belt speed reduction type high-efficiency pumping unit with single movable pulley Download PDF

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Publication number
CN105019867A
CN105019867A CN201510437857.4A CN201510437857A CN105019867A CN 105019867 A CN105019867 A CN 105019867A CN 201510437857 A CN201510437857 A CN 201510437857A CN 105019867 A CN105019867 A CN 105019867A
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China
Prior art keywords
fixed
steel band
pumping unit
belt
screw rod
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Granted
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CN201510437857.4A
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Chinese (zh)
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CN105019867B (en
Inventor
李骏
董元柏
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Zhejiang westward electric Limited by Share Ltd
Zhejiang Xiziforward Electrical Machinery Co., Ltd.
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Zhejiang Xichuan Electrical Technology Co Ltd
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Priority to CN201510437857.4A priority Critical patent/CN105019867B/en
Publication of CN105019867A publication Critical patent/CN105019867A/en
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Publication of CN105019867B publication Critical patent/CN105019867B/en
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Abstract

The invention relates to a belt speed reduction type high-efficiency pumping unit with a single movable pulley. The belt speed reduction type high-efficiency pumping unit comprises a tower which is fixed on a cement foundation. A platform welding rack is fixed at the top of the tower. The upper platform of the platform welding rack is provided with a motor, a driving wheel, a large pulley, a guiding seat and a guiding arm. According to the belt speed reduction type high-efficiency pumping unit with the single movable pulley, a manner of driving a belt by a motor for realizing speed reduction is used. Furthermore a sucker rod and a counterweight end are respectively provided with a pulley assembly. A requirement for a motor torque is greatly reduced, thereby reducing cost, realizing easier maintenance and improving the integral operation efficiency of the pumping unit. Furthermore the belt speed reduction type high-efficiency pumping unit is provided with a winch type first steel belt. Self lifting of the counterweight can be realized, and furthermore dodging and resetting of the guiding arm are performed easily. More convenient well mending maintenance is realized. Furthermore a drawer type structure is adopted in dodging and resetting of the guiding arm, thereby realizing higher safety.

Description

A kind of belt deceleration and the high-efficiency pumping unit with single movable pulley
Technical field
The present invention relates to field of petroleum machinery, particularly relate to the deceleration of a kind of belt and the high-efficiency pumping unit with single movable pulley.
Background technology
The operation such as well workover or well-flushing is often needed in oil pumping in oil fields operation process, at this time need the structure of the horse head of pumping unit or directive wheel or leading arm one class to abdicate certain space in the vertical direction of oil well, so just can be convenient to implement lifting sucker rod.According to its design feature, existing new pumping unit is broadly divided into that complete machine is stepped down, leading arm rotates backward steps down, electronic to step down etc. several, wherein complete machine is stepped down owing to needing the operation of whole equipment movement backward, therefore consumable quantity is large simultaneously for complex structure, and degree of safety is poor, can not show a candle to other several modes of stepping down flexible.Leading arm rotates backward mode general structure bulky complex, and do not adopt the drive source that self actuator rotates as leading arm, complex operation, and the leading arm mode that rotates backward aims at the space adjusted before and after limit leading arm on the one hand at well head, on the other hand leading arm soars after turning over, and then safety is not high for the words that elevator belt fault needs manually to go to operate as run into.And most external rotor electric machine Direct driver type oil pumper cannot realize putting forward counterweight voluntarily, need to assist ability by crane, certain depth reduces practicality.
Existing oil pumper adopts winding type structure in addition, and if transmission system is rigidity, then hole condition is severe sometimes, will impact when unexpected holddown etc. occur to elevator belt or the transmission system such as wire rope, motor, affects the potential safety hazard that its life-span also exists equipment simultaneously.This structure is owing to being fixed on equipment to elevator belt or wire rope simultaneously, time therefore for well head centering, except mobile device or driving member, and more difficult realization fine setting.In addition, the mode being elevator lap wound for elevator belt is carried out, and easy adhesion or the bad situation of lap wound effect easily damage elevator belt, and service life is lower.
Summary of the invention
In order to solve above-mentioned technical problem, the object of this invention is to provide a kind of use convenient, security performance is higher and the belt of longer service life slows down and high-efficiency pumping unit with single movable pulley.
In order to realize above-mentioned object, present invention employs following technical scheme:
A kind of belt deceleration and the high-efficiency pumping unit with single movable pulley, comprise the pylon be fixed on cement ground, the top of described pylon is fixed with platform welding frame, the upper mounting plate of described platform welding frame is provided with motor, driving wheel, large belt wheel, guide holder and leading arm, described driving wheel is fixed on the middle part of upper mounting plate by drive wheel bracket, and the middle part of driving wheel is wound with the first steel band, described large belt wheel is positioned at the outer end of drive wheel bracket and coaxially fixes with driving wheel, described motor is fixed on one end of upper mounting plate, and be connected with large belt wheel by belt, described guide holder is fixed on the other end of upper mounting plate, and the upper surface of guide holder is provided with upper pin, described leading arm runs through guide holder and is movably arranged on upper mounting plate, one end of described leading arm is provided with front jocket wheel, the end face of the other end is provided with rear pin shaft and the extension of the both sides of the other end is provided with limiting plate, the both sides of described guide holder are also provided with fixed head, described fixed head runs through and is provided with caging bolt, described driving wheel is also hung with the second steel band and the 3rd steel band, the two ends of the second steel band and the 3rd steel band lay respectively at the both sides of driving wheel, the bottom of leading arm is fixed on after the first pulley assembly is walked around in one end of described second steel band and the 3rd steel band, the first pulley assembly is made to be suspended on below leading arm, the lower end of described first pulley assembly is fixed with sucker rod by the first linkage, the bottom of upper mounting plate is fixed on after the other end of described second steel band and the 3rd steel band walks around the second pulley assembly, the second pulley assembly is made to be suspended on the below of upper mounting plate, the lower end of described second pulley assembly is fixed with Combined balance weight block by the second linkage, described first steel band and Combined balance weight block fix or described first steel band and rear pin shaft is fixed or the first steel band walk around from the guide wheel side of upper pin after fix with rear pin shaft again.
Preferably: described first linkage comprises templin chuck assembly, screw rod, connect otic placode and polished rod eye, the upper end of two templin chuck assemblies all fixes with the lower end of the first pulley assembly, the lower end of two templin chuck assemblies is connected otic placode respectively by bearing pin is hinged with two, the lower end of described connection otic placode also offers screw shell, be connected with threaded sleeve after polished rod eye is run through in one end of described screw rod, the other end of described screw rod is arranged with ring washer, and the part that screw rod is positioned at below polished rod eye is also arranged with rubber bar, the outside of rubber bar is arranged with sleeve, one end and the polished rod eye of described rubber bar and sleeve offset, the other end and the ring washer of described rubber bar offset, described sucker rod runs through the middle part of polished rod eye, and sucker rod is positioned at the upper part side of the being fixed with clamp of polished rod eye.
Preferably: described second linkage comprises templin chuck assembly, connecting cylinder and screw rod, the upper end of two templin chuck assemblies all fixes with the lower end of the second pulley assembly, the lower end of two templin chuck assemblies is hinged respectively by bearing pin and two connecting cylinders, described screw rod runs through the bottom of connecting cylinder, and screw rod is positioned at connecting cylinder one end is fixed with ring washer, described screw rod is also arranged with spring, one end and the ring washer of described spring offset, the bottom of the other end and connecting cylinder offsets, the upper end of described Combined balance weight block is fixed with balancing weight support, the part that described screw rod stretches out connecting cylinder fixes with balancing weight support.
Preferably: between the bottom of described leading arm front end and pylon, be also connected with leading arm support bar.
Preferably: described cement ground is also fixed with switch board.
Preferably: described sucker rod stretches into and is fixed in large production tree on the ground.
The mode that the present invention adopts motor-driven belt to slow down, and sucker rod and balancing weight end are equipped with pulley assembly, greatly reduce the demand to Motor torque, thus reduce cost, maintenance is also more prone to, improve the operating efficiency of oil pumper entirety, and the present invention is furnished with the first steel band of winding type, balancing weight can be realized and easily carry out stepping down and reset of front leading arm from carrying simultaneously, well workover is safeguarded convenient, simultaneously the stepping down and the structure adopting drawer type that resets of leading arm, safety is higher.And the method for operation of steel cable conveying belt of the present invention adopts traction-type, replace the winding type of existing market type, extend application life, well head centering can easily be finely tuned simultaneously.
In addition steel band of the present invention be fixed as flexible fastening; utilize double joint or many steel band uniform force on the one hand; the effect of buffering can be played on the other hand to situations such as unexpected holddowns; proterctive equipment and personal safety complete machine structure of the present invention simple; each component layouts is reasonable; floor space is minimum, compares existing market all devices cost minimum.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is structural representation of the present invention.
Fig. 3 and Fig. 4 is the mounting structure schematic diagram of the leading arm on upper mounting plate of the present invention when stretching out.
Fig. 5 and Fig. 6 is the mounting structure schematic diagram of the leading arm on upper mounting plate of the present invention when packing up.
Fig. 7 is steel band syndeton schematic diagram of the present invention.
Fig. 8 is the syndeton schematic diagram of oil pumping rod end of the present invention.
Fig. 9 is the syndeton schematic diagram of Balance weight end of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
A kind of belt deceleration as shown in Fig. 1-Fig. 9 and the high-efficiency pumping unit with single movable pulley, comprise the pylon 2 be fixed on cement ground 10, the top of described pylon 2 is fixed with platform welding frame 1, the upper mounting plate 11 of described platform welding frame 1 is provided with motor 5, driving wheel 6, large belt wheel 52, guide holder 71 and leading arm 7, described driving wheel 6 is fixed on the middle part of upper mounting plate 11 by drive wheel bracket 61, and the middle part of driving wheel 6 is wound with the first steel band 62, described large belt wheel 52 is positioned at the outer end of drive wheel bracket 61 and coaxially fixes with driving wheel 6, described motor 5 is fixed on one end of upper mounting plate 11, and be connected with large belt wheel 52 by belt 51, described guide holder 71 is fixed on the other end of upper mounting plate 11, and the upper surface of guide holder 71 is provided with upper pin 76, described leading arm 7 runs through guide holder 71 and is movably arranged on upper mounting plate 11, one end of described leading arm 7 is provided with front jocket wheel 72, the end face of the other end is provided with rear pin shaft 77 and the extension of the both sides of the other end is provided with limiting plate 73, the both sides of described guide holder 71 are also provided with fixed head 74, described fixed head 74 runs through and is provided with caging bolt 75, described driving wheel 6 is also hung with the second steel band 81 and the 3rd steel band 82, the two ends of the second steel band 81 and the 3rd steel band 82 lay respectively at the both sides of driving wheel 6, the bottom of leading arm 7 is fixed on after the first pulley assembly 311 is walked around in one end of described second steel band 81 and the 3rd steel band 82, the first pulley assembly 311 is made to be suspended on below leading arm 7, the lower end of described first pulley assembly 311 is fixed with sucker rod 4 by the first linkage 3, the bottom of upper mounting plate 11 is fixed on after the other end of described second steel band 81 and the 3rd steel band 82 walks around the second pulley assembly 91, the second pulley assembly is made to be suspended on the below of upper mounting plate 11, the lower end of described second pulley assembly 91 is fixed with Combined balance weight block 9 by the second linkage, described first steel band 62 fix with Combined balance weight block 9 or described first steel band 62 with rear pin shaft 77 fixing or the first steel band 62 fix with rear pin shaft 77 again after walking around from the guide wheel side of upper pin 76.
Equipment of the present invention possesses from carrying weight balance function, the first steel band fixing on driving wheel, winding on the drive wheel, for elevator form, when equipment installation or well workover complete, need first balancing weight to be promoted to certain altitude, thus the steel band of sucker rod side is fallen just can be suspended on sucker rod, therefore need oil pumper to possess the ability certainly carrying balancing weight, otherwise need by outside crane gear.Balancing weight designs for combined type, after first motor rotates forward and utilizes the first steel band that the balancing weight of constant weight is promoted to certain altitude, the second steel band and the 3rd steel band hang on sucker rod, then balancing weight falls by motor reversal, remaining counterweight is loaded, and such equipment just can normally run.The first steel band can not be unloaded in normal course of operation, make it along with driving wheel rotating, occur once dangerous situations such as the second steel band or the 3rd strip breakage, lock of controller driving wheel, balancing weight still can be fixed in the air by the first steel band, prevents generation security incident of falling.
In addition, the steel band of the first counterweight (winding type) can be utilized easily can to realize stepping down and reset of front leading arm, after equipment newly goes up well or workover treatment, need leading arm to stretch out, centering well head, turn back after now the upper pin of guide holder can being walked around in first steel band one end on driving wheel on the rear pin shaft being fixed on leading arm rear, electric machine rotation one fixing turn, leading arm is stretched out certain distance L, arrive ideal position, adjust the caging bolt of platform leading portion simultaneously and fix, when next time is operated again, leading arm arrives target location automatically.Identical, if when workover treatment needs leading arm to retract, can directly be fixed on the rear pin shaft at leading arm rear by first steel band one end, motor equidirectional makes leading arm retraction L after rotating a fixing turn.The special structure of equipment self is utilized to complete stepping down and reset of leading arm fast and effectively, without the need to too much manual operation.
Described first linkage 3 comprises templin chuck assembly 31, screw rod 32, connect otic placode 38 and polished rod eye 310, the upper end of two templin chuck assemblies 31 all fixes with the lower end of the first pulley assembly 311, the lower end of two templin chuck assemblies 31 is connected otic placode 38 respectively by bearing pin with two and is hinged, the lower end of described connection otic placode 38 also offers screw shell 39, one end of described screw rod 32 is run through polished rod eye 310 and is connected with threaded sleeve 39 afterwards, the other end of described screw rod 32 is arranged with ring washer 37, and the part that screw rod 32 is positioned at below polished rod eye 310 is also arranged with rubber bar 34, the outside of rubber bar 34 is arranged with sleeve 33, one end and the polished rod eye 310 of described rubber bar 34 and sleeve 33 offset, the other end and the ring washer 37 of described rubber bar 34 offset, described sucker rod 4 runs through the middle part of polished rod eye 310, and sucker rod 4 is positioned at the upper part side of the being fixed with clamp 41 of polished rod eye 310.
Described second linkage comprises templin chuck assembly 31, connecting cylinder 36 and screw rod 32, the upper end of two templin chuck assemblies 31 all fixes with the lower end of the second pulley assembly 91, the lower end of two templin chuck assemblies 31 is hinged respectively by bearing pin and two connecting cylinders 36, described screw rod 32 runs through the bottom of connecting cylinder 36, and screw rod 32 is positioned at connecting cylinder 36 one end is fixed with ring washer 37, described screw rod 32 is also arranged with spring 35, one end and the ring washer 37 of described spring 35 offset, the bottom of the other end and connecting cylinder 36 offsets, the upper end of described Combined balance weight block 9 is fixed with balancing weight support 93, the part that described screw rod 32 stretches out connecting cylinder 36 fixes with balancing weight support 93.
Above-mentioned steel band connects buffer structure and utilizes double joint or many steel band uniform force on the one hand, can play effect, proterctive equipment and the personal safety of buffering on the other hand to situations such as unexpected holddowns.Pressure sensor etc. can be increased simultaneously; load change situation can be monitored constantly; operating personnel can be reminded to carry out readjusting of counterweight as load exceedes preset range; also can 1 steel band situation of breaking feed back to control system in time and carry out shutting down timely repairing wherein in addition, avoid the stressed excessive of other root steel bands or cause other security incidents.
Leading arm support bar 21 is also connected with between the bottom of described leading arm 7 front end and pylon 2.Described cement ground 10 is also fixed with switch board 101.Described sucker rod 4 stretch into be fixed on the earth 43 on production tree 42 in.
The method of operation of steel band of the present invention adopts traction-type, replaces the winding type (steel band one end is fixing on the drive wheel, and the other end is fixed in lifting member) of existing market type, thus the application life providing high steel band and accordingly installation cost.In addition, again well head is aimed at after well or workover treatment have just been gone up for equipment, except equipment moves on a large scale, because the steel band of traction-type and driving wheel are not fixed, therefore after preliminary centering, under equipment can utilize the pulling force of sucker rod and the vertical gravity effect of counterweight, steel band is left and right adjustment voluntarily on the drive wheel.If adopt coiled structure, after small departing from makes to reel, steel band degree of overlapping is not high, thus affects the steel band life-span.
Motor of the present invention is based on YB2 series three-phase asynchronous motor from structure, the novel three-phase permanent-magnetic synchronous motors that rotor is inlayed permanent-magnet material and formed, and motor tail end is provided with folding brake.On the one hand, structure and the little highly versatile of conventional motor difference, easily change.On the other hand, the low-power electricity loss brake of employing, guarantees equipment and personal security.
The patent No. that steel band of the present invention adopts me to take charge of up-to-date research and development is " a kind of flat rope core elevator belt " of 201420468783.1, and identical Breaking load compares the steel cable conveying belt on existing market under requiring, thinner, wirerope diameter is less, and cost is lower, and air resistance coefficient is also little.Because the wirerope diameter of steel band internal package is little, the driving wheel diameter therefore required is also less, thus makes to provide the Motor torque of power also less.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize manual of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (6)

1. a belt deceleration and the high-efficiency pumping unit with single movable pulley, it is characterized in that: comprise the pylon (2) be fixed on cement ground (10), the top of described pylon (2) is fixed with platform welding frame (1), the upper mounting plate (11) of described platform welding frame (1) is provided with motor (5), driving wheel (6), large belt wheel (52), guide holder (71) and leading arm (7), described driving wheel (6) is fixed on the middle part of upper mounting plate (11) by drive wheel bracket (61), and the middle part of driving wheel (6) is wound with the first steel band (62), described large belt wheel (52) is positioned at the outer end of drive wheel bracket (61) and coaxially fixes with driving wheel (6), described motor (5) is fixed on one end of upper mounting plate (11), and be connected with large belt wheel (52) by belt (51), described guide holder (71) is fixed on the other end of upper mounting plate (11), and the upper surface of guide holder (71) is provided with upper pin (76), described leading arm (7) runs through guide holder (71) and is movably arranged on upper mounting plate (11), one end of described leading arm (7) is provided with front jocket wheel (72), the end face of the other end is provided with rear pin shaft (77) and the extension of the both sides of the other end is provided with limiting plate (73), the both sides of described guide holder (71) are also provided with fixed head (74), described fixed head (74) runs through and is provided with caging bolt (75), described driving wheel (6) is also hung with the second steel band (81) and the 3rd steel band (82), the two ends of the second steel band (81) and the 3rd steel band (82) lay respectively at the both sides of driving wheel (6), the bottom of leading arm (7) is fixed on after the first pulley assembly (311) is walked around in one end of described second steel band (81) and the 3rd steel band (82), the first pulley assembly (311) is made to be suspended on leading arm (7) below, the lower end of described first pulley assembly (311) is fixed with sucker rod (4) by the first linkage (3), the bottom of upper mounting plate (11) is fixed on after the other end of described second steel band (81) and the 3rd steel band (82) walks around the second pulley assembly (91), the second pulley assembly is made to be suspended on the below of upper mounting plate (11), the lower end of described second pulley assembly (91) is fixed with Combined balance weight block (9) by the second linkage, described first steel band (62) and Combined balance weight block (9) fix or described first steel band (62) with rear pin shaft (77) fixing or the first steel band (62) fix with rear pin shaft (77) again after walking around from the guide wheel side of upper pin (76).
2. a kind of belt deceleration according to claim 1 and the high-efficiency pumping unit with single movable pulley, it is characterized in that: described first linkage (3) comprises templin chuck assembly (31), screw rod (32), connect otic placode (38) and polished rod eye (310), the upper end of two templin chuck assemblies (31) all fixes with the lower end of the first pulley assembly (311), the lower end of two templin chuck assemblies (31) is connected otic placode (38) respectively by bearing pin with two and is hinged, the lower end of described connection otic placode (38) also offers screw shell (39), one end of described screw rod (32) is run through polished rod eye (310) and is connected with threaded sleeve (39) afterwards, the other end of described screw rod (32) is arranged with ring washer (37), and the part that screw rod (32) is positioned at polished rod eye (310) below is also arranged with rubber bar (34), the outside of rubber bar (34) is arranged with sleeve (33), one end and the polished rod eye (310) of described rubber bar (34) and sleeve (33) offset, the other end and the ring washer (37) of described rubber bar (34) offset, described sucker rod (4) runs through the middle part of polished rod eye (310), and sucker rod (4) is positioned at the upper part side of being fixed with clamp (41) of polished rod eye (310).
3. a kind of belt deceleration according to claim 1 and the high-efficiency pumping unit with single movable pulley, it is characterized in that: described second linkage comprises templin chuck assembly (31), connecting cylinder (36) and screw rod (32), the upper end of two templin chuck assemblies (31) all fixes with the lower end of the second pulley assembly (91), the lower end of two templin chuck assemblies (31) is hinged respectively by bearing pin and two connecting cylinders (36), described screw rod (32) runs through the bottom of connecting cylinder (36), and screw rod (32) is positioned at connecting cylinder (36) one end is fixed with ring washer (37), described screw rod (32) is also arranged with spring (35), one end and the ring washer (37) of described spring (35) offset, the bottom of the other end and connecting cylinder (36) offsets, the upper end of described Combined balance weight block (9) is fixed with balancing weight support (93), the part that described screw rod (32) stretches out connecting cylinder (36) fixes with balancing weight support (93).
4. a kind of belt deceleration according to claim 1 and the high-efficiency pumping unit with single movable pulley, is characterized in that: be also connected with leading arm support bar (21) between the bottom of described leading arm (7) front end and pylon (2).
5. a kind of belt deceleration according to claim 1 and the high-efficiency pumping unit with single movable pulley, is characterized in that: described cement ground (10) is also fixed with switch board (101).
6. a kind of belt according to claim 1 slows down and high-efficiency pumping unit with single movable pulley, it is characterized in that: described sucker rod (4) stretches in the production tree (42) that is fixed on the earth (43).
CN201510437857.4A 2015-07-23 2015-07-23 A kind of belt slows down and the high-efficiency pumping unit with single movable pulley Active CN105019867B (en)

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CN201510437857.4A CN105019867B (en) 2015-07-23 2015-07-23 A kind of belt slows down and the high-efficiency pumping unit with single movable pulley

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CN105019867B CN105019867B (en) 2017-10-13

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719811A (en) * 1985-02-25 1988-01-19 Rota-Flex Corporation Well pumping unit with counterweight
WO2002068788A2 (en) * 2001-02-26 2002-09-06 'castles' Home Services Incorporated Well pumping unit driven by linear motor
US20080105422A1 (en) * 2006-11-08 2008-05-08 Wuhan Jianghan Petroleum Machinery Co., Ltd. Compact well pumping unit actuated by linear motor with counterweight directly attached to slider
WO2008058463A1 (en) * 2006-11-17 2008-05-22 Sinopec Group, Shengli Petroleum Administration Transport Corporation An annular gear rack pumping unit
CN102140906A (en) * 2011-03-29 2011-08-03 周生祥 Double-roller tower type oil-pumping unit device
CN202031550U (en) * 2011-05-06 2011-11-09 高智 Non-beam pumping unit
CN202560177U (en) * 2012-05-11 2012-11-28 温州华斯特环保设备有限公司 Tower-type double-chain belt pumping unit
CN202767956U (en) * 2012-09-13 2013-03-06 中国石油大学(华东) Vertical type pumping unit well repair abdicating organization
CN104265243A (en) * 2014-08-19 2015-01-07 北京航空航天大学 Tower type oil sucking machine
CN204941469U (en) * 2015-07-23 2016-01-06 浙江西传电气科技有限公司 A kind of belt deceleration and the high-efficiency pumping unit with single movable pulley

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719811A (en) * 1985-02-25 1988-01-19 Rota-Flex Corporation Well pumping unit with counterweight
WO2002068788A2 (en) * 2001-02-26 2002-09-06 'castles' Home Services Incorporated Well pumping unit driven by linear motor
US20080105422A1 (en) * 2006-11-08 2008-05-08 Wuhan Jianghan Petroleum Machinery Co., Ltd. Compact well pumping unit actuated by linear motor with counterweight directly attached to slider
WO2008058463A1 (en) * 2006-11-17 2008-05-22 Sinopec Group, Shengli Petroleum Administration Transport Corporation An annular gear rack pumping unit
CN102140906A (en) * 2011-03-29 2011-08-03 周生祥 Double-roller tower type oil-pumping unit device
CN202031550U (en) * 2011-05-06 2011-11-09 高智 Non-beam pumping unit
CN202560177U (en) * 2012-05-11 2012-11-28 温州华斯特环保设备有限公司 Tower-type double-chain belt pumping unit
CN202767956U (en) * 2012-09-13 2013-03-06 中国石油大学(华东) Vertical type pumping unit well repair abdicating organization
CN104265243A (en) * 2014-08-19 2015-01-07 北京航空航天大学 Tower type oil sucking machine
CN204941469U (en) * 2015-07-23 2016-01-06 浙江西传电气科技有限公司 A kind of belt deceleration and the high-efficiency pumping unit with single movable pulley

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