CN1095453A - Towed moment-changing beam-balanced pumping unit - Google Patents
Towed moment-changing beam-balanced pumping unit Download PDFInfo
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- CN1095453A CN1095453A CN 93105993 CN93105993A CN1095453A CN 1095453 A CN1095453 A CN 1095453A CN 93105993 CN93105993 CN 93105993 CN 93105993 A CN93105993 A CN 93105993A CN 1095453 A CN1095453 A CN 1095453A
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Abstract
A kind of towed moment-changing beam-balanced pumping unit that is used for oilfield, be characterised in that and adopted towed walking beam variable torque balance device, advantage is simple in structure, be easy to make and durable in use, and complete machine is in light weight, power consumption is little, compare material-saving 55-70%, economize on electricity 50% with existing advanced beam-pumping unit.
Description
The present invention relates to People's Republic of China's patent of invention: two-stage balance bar beam-punping unit (application number: 88107522, the authorization number: CN1015728B).
Related two-stage balance bar beam-punping unit has been initiated the one-level Equilibrator that has the secondary balanced action concurrently, and counterbalance effect is preferably arranged.But pumping unit complete machine weight still dislikes bigger, is further improved.
Task of the present invention is to create the littler two-stage balanced beam-pumping unit of a kind of complete machine weight.
This invention task is to be realized by the technological scheme of towed moment-changing beam-balanced pumping unit.This technological scheme has comprised in two-stage balance bar beam-punping unit and other beam-pumping unit, as whole prior arts such as speed reducer, walking beam, horse head, main crank, connecting rod and one-level balance, secondary balance, inventive point has been to create a kind of new one-level Equilibrator that has the secondary balanced action concurrently: towed walking beam variable torque balance device.The balancing mass Q of this Equilibrator, the leading role of mat guide rail or static pulley 17, vertical upper and lower motion; Its weight adopts the rope band mode of traction to act on the walking beam 3, and the simplest organization plan is that the lower end of rope band 16 hitches balancing mass Q, and this rope band upwards is hinged with static pulley its upper end, 17 tangent back of pumping unit afterbody and the tail end of walking beam 3.Because walking beam 3 is done the cycle variation with the angle of 16 of rope bands in the pumping unit operation process, the action of gravity of balancing mass Q arm of force for the beam travelling supporting center on walking beam 3 also changes along with doing the cycle, thereby except that the one-level trimming moment, also produced the secondary trimming moment.To sum up, the technological scheme of towed moment-changing beam-balanced pumping unit can followingly be described:
A kind of towed moment-changing beam-balanced pumping unit that is used for oilfield mainly comprises:
A power engine,
A speed reducer,
One cover supplies the belt driver of power engine driving speed reducer,
One cover is changed to the walking beam oscillating motion with the rotation motion of reduction unit output shaft, the four hinge crankrocker mechanism of forming by main crank 1, connecting rod 2, walking beam 3 and bracket base 4, wherein main crank 1 is packed in the reduction unit output shaft external part, walking beam 3 is lived by beam travelling supporting 7 with support 4 and is cut with scissors, one end and the main crank 1 of connecting rod 2 are hinged, the other end by crossbeam 6 or directly and walking beam 3 hinged
One cover horse head device, sheet horse head that is connected as a single entity with walking beam 3 or the pulley horse head hinged with support 4,
One cover rope suspension apparatus, wherein wire rope lower end and rope hanger binding, the upper end is suspended on sheet horse head top or strides across the pulley horse head and walking beam 3 is hinged,
One cover braking device,
One cover one-level Equilibrator comprises crank balance, traditional beam balance or the combined balance system that the two has both,
One cover secondary Equilibrator,
One cover has the one-level Equilibrator of secondary balanced action concurrently,
It is characterized in that:
The described one-level Equilibrator that has the secondary balanced action concurrently is towed walking beam variable torque balance device.
Theory analysis shows, compares with other one-level Equilibrator that has the secondary balanced action concurrently, and towed walking beam variable torque balance device has counterbalance effect preferably, particularly high jig frequency operating mode, and counterbalance effect is better.Structural design shows, suspension point maximum load 16tf, stroke 6m, jig frequency 10mln
-1The preposition long stroke towed moment-changing beam-balanced pumping unit of 16 types, the complete machine quality is 18t only, produce the same model back-crank pumping unit of (China Baoji factory is imitated) with U.S. Lufklin company at present and compare material-saving 70%, compare material-saving 55% with the same model non-synchronous crank balance pumping unit that U.S. CMI company creates; And speed reducer Peak torque of pumping unit of the present invention, electric power etc. are all little than them, and the oil pumping ability is but big than them.Therefore can expect that the comprehensive benefit of towed moment-changing beam-balanced pumping unit is very considerable.
The invention provides numerous embodiments of towed moment-changing beam-balanced pumping unit, be further described below by embodiment and accompanying drawing.
Fig. 1 is embodiment one a structural representation.
Fig. 2 is embodiment two a structural representation.
Fig. 3 is embodiment three a structural representation.
Fig. 4 is embodiment four a structural representation.
Fig. 5 is embodiment five a structural representation.
Fig. 6 is embodiment six a structural representation.
Fig. 7 is embodiment seven a structural representation.
Among the figure: the 1-main crank, the 2-connecting rod, the 3-rocking bar is a walking beam, 4-pumping unit support, base, 5-horse head, the sheet horse head that is connected as a single entity with walking beam 3, or the pulley horse head hinged with support 4,6-crossbeam, 7-beam travelling supporting, the 8-speed reducer, speed reducer, 9-speed reducer input shaft, 10-belt driver, the 11-power engine, 12-brake, 13-reduction unit output shaft, 14-2 ω crank hammer, 15-transpose the seat, the 16-rope band, comprise wire rope, braid, chain etc., the 17-static pulley, 18-static pulley seat, 19-movable pulley, the 20-adjusting nut, the 21-screw bolt seat, 22-screw rod, 23-rope band seat, the 24-screw rod, 25-rope band slide, 26-static pulley slide, 27-screw rod, the 28-wire rope, 29-leading truck, the 30-piece of transposing, 31-has the retarder of retrograde auto-lock function, worm speed reducer or planetary reducer, the 32-reel, 33-wire rope, 34-static pulley, the 35-balancing stand, 36-turns to static pulley, the right wire rope of 37-, 38-tensioning static pulley, the right static pulley of 39-, 40-left side static pulley, 41-left side wire rope, 42-reel bearing, the 43-reel, 44-has the retarder of retrograde auto-lock function, worm speed reducer or planetary reducer, the input shaft of 45-retarder 44, the 46-screw rod, the nut that 47-and walking beam are connected as a single entity, 48-screw rod 46 stretch out termination, the underground vertical shaft of A-pumping unit afterbody, positioning hole on B-walking beam 3 or the positioning seat 15, the groove at C-positioning seat 15 tops, the slideway vertical on the D-walking beam 3, the slideway on the E-positioning seat 15 with walking beam.
Embodiment one, referring to Fig. 1, this is the basic model of towed moment-changing beam-balanced pumping unit, its walking beam 3 and bracket base 4 etc. are similar with existing rear-mounted beam-pumping unit, its drive mechanism and existing back-crank pumping unit are similar, promptly rotate by the input shaft 9 that belt driver 10 drives speed reducer 8 by a motor 11, after speed reducer 8 slows down, drive two main cranks, 1 rotation that is packed in reduction unit output shaft 13 external parts respectively, main crank 1 is drivening rod 2 again, and make reciprocally swinging by the horse head 5 that crossbeam 6 drives walking beams 3 and is contained in walking beam 3 front ends.Walking beam 3 is movably articulated in the top of support 4 by beam travelling supporting 7, and motor, speed reducer then are fixed on the bracket base 4.See that over against the horse head working surface except that belt driver, motor 11 with brake 12, whole pumping unit is symmetrical structure.
The inventive point of present embodiment is that the one-level Equilibrator that has the secondary balanced action concurrently has adopted towed walking beam variable torque balance device, and implements with a kind of static pulley haulage gear.(or line of centres level and tangent two a) static pulley 17 is set, it is lived mutually by static pulley seat 18 and oil pumping unit base 4 and cuts with scissors, a kind of concrete structure is that static pulley 17 usefulness axle and bearing are assemblied on the static pulley seat 18, after static pulley seat 18 borrows jackscrew (not drawing among the figure) to mix up the position, with bolt and oil pumping unit base 4 fixed connections.1 to 8 rope band (wire rope, braid, chain etc.) 16 is set, the lower end hanging balancing quality Q of rope band, it upwards with static pulley 17 tangent after, the upper end is by positioning seat 15 and walking beam 3 hinge of living: positioning seat 15 is the shape of a saddle and walking beam 3 to be slided and joins, and is fixed on the walking beam with bolt or alternate manner after mixing up the position.Have 4 to 12 positioning hole B on the positioning seat, rope band 16 is by being through bearing pin and positioning seat 15 among the positioning hole B hinge of living.Positioning seat 15 can have positioner or positioner at random; Also can make one, promptly directly exist with walking beam 3
Offer positioning hole B on the following flap of shape walking beam, at this moment walking beam also can adopt
Shape or
The shape structure.
If it is the angular velocity of main crank 1 that a pair of 2 ω crank hammer 14(ω are set on reduction unit output shaft), will obtain better counterbalance effect.
Embodiment two, and referring to Fig. 2, it and embodiment's one difference is that towed walking beam variable torque balance device is a kind of movable pulley haulage gear.Movable pulley 19 is by positioning seat 15 and walking beam 3 hinges alive, a kind of concrete structure is: be saddle-shaped positioning seat 15 with 3 sliding joining of walking beam, one groove C is arranged at its top, after the screw rod 22 of buckle head passes the screw bolt seat 22 that is connected as a single entity with the walking beam top, the gib head of its end hooks described groove C, the other end then is rotary with adjusting nut 20, and rotating nut 20 is with regard to the position of can regulate positioning seat 15 on walking beam 3; Also screw rod 20 can be connected on the positioning seat 15, also can make a screw on positioning seat 15, screw rod 20 is tightened in this screw.Positioning seat 15 also can have the positioner of other form or be connected as a single entity with walking beam 3.Offer 4-12 positioning hole B on the positioning seat 15, movable pulley 19 is lived with positioning seat 15 and is cut with scissors by being through bearing pin among the positioning hole B.One end of rope band 16 or direct and oil pumping unit base 4 hinges alive (can be welded with the hook of 4 to 8 groups of lanyard bands on the oil pumping unit base 4); Or rope band slide 25 and oil pumping unit base 4 hinges alive by having rackwork, described rackwork can adopt screw mechanism, a kind of concrete structure is: be provided with the fixed rope band seat 23 of oil pumping unit base 4, rope band slide 25 and rope band 16 are hinged and join with the slideway cunning on the rope band seat 23, and rope band slide 25 has screw and screws with the screw rod 24 that hinge is contained on the rope band seat 23, or be fixed with screw rod on the rope band slide 25 and screw with the nut that is contained on the rope band seat 23 of hinge, rotating screw bolt (or nut) 24 just can order about 25 positioning of rope band slide and the change equilibrium condition.Rope band 16 1 ends no matter with which kind of mode with oil pumping unit base 4 hinge of living, it stride across with walking beam 3 live the movable pulleys 19 of hinge and with static pulley 17 tangent after, the other end hanging balancing quality Q.Static pulley 17 is still by static pulley seat 18 and oil pumping unit base 4 hinges alive.
The advantage of present embodiment is that balancing mass Q is less, and the support lateral load is less, and the positive and negative part of secondary trimming moment is relatively more symmetrical.
Embodiment three, and referring to Fig. 3, this is a kind of wheeled beam-pumping unit: pulley horse head 5 is lived with the top-supported of support 4 and is cut with scissors, and wire rope 28 lower ends are connected with rope hanger, and it is hinged with walking beam 3 that the other end strides across pulley horse head 5 backs.Towed walking beam variable torque balance device adopts the static pulley haulage gear among the figure: the tail end of walking beam 3 has 4-12 positioning hole B, and rope band 16 is lived with walking beam 3 and cut with scissors by being through bearing pin among the positioning hole B, after its downward and static pulley 17 is tangent, and the hanging balancing quality Q.
In the present embodiment, towed walking beam variable torque balance device also can adopt the movable pulley haulage gear among the embodiment two.
In the present embodiment, static pulley 17 has the spiral rackwork, concrete structure is: static pulley seat 18 has slideway and is connected with oil pumping unit base 4, static pulley slide 26 is set joins with static pulley 17 hinges alive and with the slideway cunning of static pulley seat 18, this slide 26 has screw and screws (slide 26 also can have screw rod and screw with the nut that hinge is contained on the static pulley seat 18) with the screw rod 27 that hinge is contained on the static pulley seat 18, rotating screw bolt 27 just can order about slide 26 and be with static pulley 17 positioning, reaches the purpose of adjustment.
In the embodiment of the invention, static pulley 17 all can adopt this rackwork.
Embodiment four, referring to Fig. 4, it and embodiment's three difference, be that towed walking beam variable torque balance device has adopted a kind of slideway haulage gear, the inboard of two leading trucks 29 that are connected as a single entity with ground or oil pumping unit base 4 constitutes vertical slideway, the vertical slideway cunning with this of balancing mass (or trundle is housed) is joined, rope band 16 1 ends and balancing mass Q live and cut with scissors, the other end and positioning seat 15 are hinged and (also can adopt embodiment two scheme by being through bearing pin among its positioning hole B, rope band 16 the other ends stride across with behind the hinged movable pulley 19 of positioning seat 15, direct or hinged) by rope band slide 25 and oil pumping unit base 4, positioning seat 15 is joined with walking beam 3 cunnings or is connected as a single entity, and has positioner and/or be provided with 4 to 12 positioning hole B.
Among Fig. 4, rope band 16 also can be used the rigidity connecting rod instead and replace.
Embodiment five, and referring to Fig. 5, its same Fig. 6, Fig. 7 is the same, all are only to draw the bound fraction of positioning seat 15 and walking beam 3, and the other parts of pumping unit can adopt any scheme among the embodiment one to four (Fig. 1 to 4).In present embodiment (Fig. 5), the positioner of the positioning seat 15 of joining with the walking beam cunning has adopted screw mechanism: nut 47 is cemented on the lower wing plate of walking beam 3, screw rod 46 passes positioning seat 15 and hinged with it by the bearing at its two ends, the head 48 of rotating screw bolt 46 can change the purpose that the position of positioning seat 15 on walking beam 3 reaches adjustment.
Also can adopt another kind of scheme, nut 47 is cemented on the walking beam 3, and the head of screw rod 46 withstands on the positioning seat 15 or the gib head of screw rod 46 heads is hooked in the groove of positioning seat 15.
Embodiment six, and referring to Fig. 6, it has two characteristics:
(1) positioner of positioning seat 15 is a kind of retarder-reel-pulley tensioning mechanisms: the retarder 44 with retrograde auto-lock function, be packed in walking beam 3 tops together near the beam travelling supporting place with reel 43, the output shaft and the spool shaft of retarder 44 link by coupling, walk around the hinged left static pulley 40 left end connection of positioning seat 15 together around the wire rope 41 of reel left part at the walking beam middle part, walk around hinged right static pulley 39 around the wire rope 37 of reel right part at the walking beam middle part, tensioning static pulley 38 and hinged beam travelling tail end turn to static pulley 36, connect with the right-hand member of positioning seat 15.Rotate the input shaft 45 of retarder 44, (or one put receipts) received and one put to left wire rope 41 and right wire rope 37 1, and the retractable amount is permanent to be equated, therefore, not only can regulate the position of positioning seat 15 on walking beam at random, and it always is tensioned and is fixed on the walking beam.
(2) be provided with positioning piece and positioner thereof.Sliding the joining of slideway E of positioning piece 30 and positioning seat 15 is set, this positioning piece and movable pulley 19 hinges alive or directly hinged with rope band 16, described positioner adopts common pulley or sheave block-roll device: positioning piece 30 directly or by the movable pulley axle of sheave block is being hung in the lower end of wire rope 33, after static pulley 34 or sheave block are walked around in the upper end, on reel 32, the hinged top of static pulley or sheave block at positioning seat 15, the same retarder (worm speed reducer of axle of reel 32 with retrograde auto-lock function, planetary reducer) 31 output shaft connects, and is bearing in together on the walking beam 3.
STOCHASTIC CONTROL retarder 31 and 44 input shaft can make towed moment-changing beam-balanced pumping unit reach the optimum balance state.
Embodiment seven, referring to Fig. 7, it and embodiment's six difference is: cancelled positioning seat 15 and positioner thereof, fixed two balancing stands 35 of beam travelling tail end, they constitute a slideway D vertical with walking beam, and positioning piece 30 and this slideway D are sliding to be joined, simultaneously, static pulley 34 changes into walking beam 3 hinged, if adopt sheave block to replace static pulley 34, this sheave block also is bearing on the walking beam 3.
Among the embodiment six and seven, the positioner of positioning piece 30 also can adopt: screw mechanism, fluid cylinder mechanism and other straight-moving mechanism.
Should illustrate:
(1) in the towed moment-changing beam-balanced pumping unit of the present invention, described balancing mass Q is suspended among the underground vertical shaft A of pumping unit afterbody with rope band 16, it can adopt block counterweight formula structure, also can adopt case structure: be welded into the suspension type tandem-driving bogie with angle steel, steel plate, filling Iron And Steel Scrap, iron sand, iron and steel quarrel, pig, pig scrap, fragment of brick, stone, earth, cement, water or other weight in the case.
(2) positioner of towed moment-changing beam-balanced pumping unit, available handwheel drives, also the available motor crawl.
(3) walking beam of towed moment-changing beam-balanced pumping unit can adopt conventional structure, can adopt the triangle walking beam or
The shape walking beam also can be designed to the truss type walking beam.
(4) no matter be which kind of beam-pumping unit, all can adopt towed walking beam variable torque balance device, be designed to towed moment-changing beam-balanced pumping unit.
Claims (9)
1, a kind of towed moment-changing beam-balanced pumping unit mainly comprises:
A power engine,
A speed reducer,
One cover supplies the belt driver of power engine driving speed reducer,
One cover is changed to the walking beam oscillating motion with the rotation motion of reduction unit output shaft, the four hinge crankrocker mechanism of forming by main crank 1, connecting rod 2, walking beam 3 and bracket base 4, wherein main crank 1 is packed in the reduction unit output shaft external part, walking beam 3 is lived by beam travelling supporting 7 with support 4 and is cut with scissors, one end and the main crank 1 of connecting rod 2 are hinged, the other end by crossbeam 6 or directly and walking beam 3 hinged
One cover horse head device, sheet horse head that is connected as a single entity with walking beam 3 or the pulley horse head hinged with support 4,
One cover rope suspension apparatus, wherein wire rope lower end and rope hanger binding, the upper end is suspended on sheet horse head top or strides across the pulley horse head and walking beam 3 is hinged,
One cover braking device,
One cover one-level Equilibrator comprises crank balance, traditional beam balance or the combined balance system that the two has both,
One cover secondary Equilibrator,
One cover has the one-level Equilibrator of secondary balanced action concurrently,
It is characterized in that:
The described one-level Equilibrator that has the secondary balanced action concurrently is towed walking beam variable torque balance device.
2, according to the towed moment-changing beam-balanced pumping unit of claim 1, it is characterized in that described towed walking beam variable torque balance device is a kind of static pulley haulage gear: static pulley 17 is lived with oil pumping unit base 4 by static pulley seat 18 and is cut with scissors, rope band 16 lower end hanging balancing quality Q, upper end, this rope band and static pulley 17 tangent back is by positioning seat 15 or directly live with walking beam 3 and cut with scissors, positioning seat 15 is joined with walking beam 3 cunnings or is connected as a single entity, and has positioner and/or be provided with 4 to 12 positioning hole B.
3, towed moment-changing beam-balanced pumping unit according to claim 1, it is characterized in that described towed walking beam variable torque balance device is a kind of movable pulley haulage gear: movable pulley 19 is by positioning seat 15 or direct and walking beam 3 hinges alive, positioning seat 15 is joined with walking beam 3 cunnings or is connected as a single entity, and have positioner and/or be provided with 4 to 12 positioning hole B, rope band 16 1 ends by having rackwork rope band slide 25 or directly and oil pumping unit base 4 hinged, this rope band 16 stride across movable pulley 19 and with static pulley 17 tangent after, the other end hanging balancing quality Q, static pulley 17 are lived with oil pumping unit base 4 by static pulley seat 18 and are cut with scissors.
4, towed moment-changing beam-balanced pumping unit according to claim 1, it is characterized in that described towed walking beam variable torque balance device is a kind of slideway haulage gear: the inboard of two leading trucks 29 that are connected as a single entity with ground or oil pumping unit base constitutes vertical slideway, the vertical slideway cunning with this of balancing mass Q is joined, rope band 16 1 ends and balancing mass Q live and cut with scissors, live hinge or stride across of the other end and positioning seat 15 with behind the hinged movable pulley 19 of positioning seat 15, direct or hinged by rope band slide 25 and oil pumping unit base 4, positioning seat 15 is joined with walking beam 3 cunnings or is connected as a single entity, and has positioner and/or be provided with 4 to 12 positioning hole B.
5, according to claim 1 and 3,4 towed moment-changing beam-balanced pumping unit, the rackwork that it is characterized in that rope band slide 25 adopts screw mechanism, a kind of concrete structure is: be provided with the fixed rope band seat 23 of oil pumping unit base 4, rope band slide 25 is joined with the slideway cunning on the rope band seat 23, and rope band slide 25 has screw and screws with the screw rod 24 that hinge is contained on the rope band seat 23, perhaps is fixed with screw rod on the rope band slide 25 and screws with the nut that hinge is contained on the rope band seat 23.
6, according to claim 1 and 2,3 towed moment-changing beam-balanced pumping unit, it is characterized in that: static pulley 17 has the spiral rackwork, a kind of concrete structure is: static pulley seat 18 has slideway and is connected with oil pumping unit base 4, the static pulley slide 26 that a hinge sets pulley 17 is set joins with the slideway cunning of static pulley seat 18, this slide 26 has screw and screws with the screw rod 27 that hinge is contained on the static pulley seat 18, perhaps has screw rod and cut with scissors the nut that is contained on the static pulley seat 18 to screw.
7, according to claim 12,3 or 4 towed moment-changing beam-balanced pumping unit together, the positioner that it is characterized in that described positioning seat 15 has adopted screw mechanism, a kind of concrete structure is: nut 47 connects firmly on walking beam 3, screw rod 46 passes positioning seat 15 and hinged with it by the bearing at its two ends, and perhaps screw rod 47 withstands on or is hooked on the positioning seat 15.
8, according to claim 1 same 2,3 or 4 towed moment-changing beam-balanced pumping unit, the positioner that it is characterized in that described positioning seat 15 is a kind of retarder-reel-pulley tensioning mechanism: the retarder 44 with retrograde auto-lock function, be packed in walking beam 3 tops together near the beam travelling supporting place with reel 43, the output shaft and the spool shaft of retarder 44 link by coupling, walk around the hinged left static pulley 40 left end connection of positioning seat 15 together around the wire rope 41 of reel left part at the walking beam middle part, walk around hinged right static pulley 39 around the wire rope 37 of reel right part at the walking beam middle part, tensioning static pulley 38 and hinged beam travelling tail end turn to static pulley 36, connect with the right-hand member of positioning seat 15.
9, according to claim 1 same 2,3 or 4 towed moment-changing beam-balanced pumping unit, it is characterized in that being provided with positioning piece 30 and positioner thereof: slideway E sliding join of positioning piece 30 with the vertical slideway D or the positioning seat 15 of walking beam 3 is set, this positioning piece 30 and movable pulley 19 hinges alive or directly hinged with rope band 16, described positioner adopts common pulley or sheave block-roll device: positioning piece 30 directly or by the movable pulley axle of sheave block is being hung in the lower end of wire rope 33, after static pulley 34 or sheave block are walked around in the upper end, on reel 32, static pulley 34 or sheave block are hinged on walking beam 3 or the top of positioning seat 15, the same output shaft with retarder 31 of retrograde auto-lock function of axle of reel 32 links, and is bearing in together on the walking beam 3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105993 CN1095453A (en) | 1993-05-21 | 1993-05-21 | Towed moment-changing beam-balanced pumping unit |
| US08/169,637 US5528947A (en) | 1992-12-21 | 1993-12-20 | Rod pumping assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93105993 CN1095453A (en) | 1993-05-21 | 1993-05-21 | Towed moment-changing beam-balanced pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1095453A true CN1095453A (en) | 1994-11-23 |
Family
ID=4986021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93105993 Pending CN1095453A (en) | 1992-12-21 | 1993-05-21 | Towed moment-changing beam-balanced pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095453A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005116400A1 (en) * | 2004-05-31 | 2005-12-08 | Wenlin Ren | A pumping unit |
| CN101672173B (en) * | 2009-08-31 | 2012-07-11 | 濮阳市双发实业有限责任公司 | Dual horsehead fine balance energy-saving walking beam pumping unit |
| CN107143310A (en) * | 2016-03-01 | 2017-09-08 | 中国石油化工股份有限公司 | The special oil pumper arrangements for speed regulation of heavy oil wells |
-
1993
- 1993-05-21 CN CN 93105993 patent/CN1095453A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005116400A1 (en) * | 2004-05-31 | 2005-12-08 | Wenlin Ren | A pumping unit |
| CN101672173B (en) * | 2009-08-31 | 2012-07-11 | 濮阳市双发实业有限责任公司 | Dual horsehead fine balance energy-saving walking beam pumping unit |
| CN107143310A (en) * | 2016-03-01 | 2017-09-08 | 中国石油化工股份有限公司 | The special oil pumper arrangements for speed regulation of heavy oil wells |
| CN107143310B (en) * | 2016-03-01 | 2023-10-20 | 中国石油化工股份有限公司 | Speed regulating device of pumping unit special for thick oil well |
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