CN105003231A - Shear fork moving type oil pumping unit - Google Patents
Shear fork moving type oil pumping unit Download PDFInfo
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- CN105003231A CN105003231A CN201510379371.XA CN201510379371A CN105003231A CN 105003231 A CN105003231 A CN 105003231A CN 201510379371 A CN201510379371 A CN 201510379371A CN 105003231 A CN105003231 A CN 105003231A
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- scissor
- movable rod
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Abstract
The invention discloses a shear fork moving type oil pumping unit. Through the transverse or longitudinal approach or leaving of a shear fork structure, a rod post is driven to ascend or descend; the work of the shear fork structure is realized through a crank structure used as a balance and reverser used for rod ascending and descending; and the effects of lifting a borehole pumping rod and driving an oil sucking pump to vertically move are achieved, so that the technical problems of operation and maintenance complexity and structure complexity of a rod-pumping-pump oil pumping unit in the prior art are solved. The simple and reliable shear fork moving type oil pumping unit in a shear fork type power transfer mode is realized. The top end of a main body frame of the shear fork moving type oil pumping unit is provided with pulleys; a steel wire rope bypasses the pulleys; one end of the steel wire rope is connected with the borehole pumping rod connected with the oil sucking pump; the other end of the steel wire rope is fixed at the upper end of a shear fork moving device; the lower end of the shear fork moving device is rotationally connected with a movable connecting rod mechanism; the movable connecting rod mechanism is clamped and connected with a crank assembly; and the crank assembly is connected with a power device.
Description
Technical field
The present invention relates to the technical field of mechanical equipment of recover petroleum, particularly relate to a kind of scissor dynamic formula oil pumper.
Background technology
At present, sucker-rod pumping lifting technology oil pumper, in oil field development is produced, is used widely, and uses reliable, stable, is the main surface technology that onshore oil field recovers the oil.Its main operational principle is the power produced by motor, drives oil pumping pump rod by gearbox, crank, connecting rod, walking beam, horse head and polished rod eye etc., and then drives oil well pump to pump, and the crude oil in stratum is given rise to ground.
Current rod pumping pump oil pumper mainly contains: conventional beam-pumping unit, belt type pumping unit, oil sucking machine of compound permanent magnet motor.Conventional beam-pumping unit mainly transmits power by walking beam; Defect is that floor space is large, and energy consumption is high, and gross weight tonnage is large, complex structure etc.Belt type pumping unit mainly transmits power by wide belt, and critical piece transmits the complex process of the wide belt force of power, and oil sucking machine of compound permanent magnet motor operation maintenance bothers.
Visible, existing rod pumping pump Pumping Unit is complicated, and operation maintenance is complicated.
Summary of the invention
The object of the present invention is to provide a kind of scissor dynamic formula oil pumper that is simple, scissor-type power delivery mode reliably, complicated to solve rod pumping pump Pumping Unit of the prior art, the technical problem of operation maintenance complexity.
Scissor dynamic formula oil pumper provided by the invention comprises: main frame, wire rope, and scissor moves device, crank assembly, power set, pulley, movable rod mechanism; The top of described main frame is installed with described pulley, described wire rope strides across described pulley, one end of described wire rope is connected to pump rod in the well that is connected with described oil well pump, the other end of described wire rope is fixed on the upper end that described scissor moves device, described scissor moves the lower end of device and described movable rod mechanism for being rotationally connected, described movable rod mechanism and the clamping of described crank assembly, described crank assembly connects power set; Wherein, described power set provide power to described crank assembly, the described movable rod mechanism that rotarily drives of described crank assembly carries out horizontal movement, described horizontal movement drives described scissor to move device to carry out scissor motion, described scissor motion drives described wire rope around described pulley motion, to drive the up-downgoing of pump rod in described well.
Preferably, described scissor moves device and is formed by connecting by multistage mutually isostructural scissor motivation structure, and every grade of described scissor motivation structure comprises two scissors rods, clutch shaft bearing pair; Wherein, middle part and the end of each described scissors rod all have through hole, connect the through hole in the middle part of two described scissors rods at the same level by described clutch shaft bearing pair.
Preferably, described scissor moves device and also comprises multiple second bearing pair, is connected the through hole of two described scissors rod ends of adjacent two-stage by described second bearing pair.
Preferably, described movable rod mechanism comprises: urceolus, inner core, kelly, described urceolus is enclosed within described inner core, the exposed junction of described inner core is fixed on the first table top, the end winding support of described urceolus described kelly, described kelly snaps in described crank assembly, to make described movable rod mechanism and described crank assembly be described clamping; The bottom of a described scissors rod of scissor motivation structure described in the first order is installed on described urceolus by described second bearing pair, make described scissor move the lower end of device and described movable rod mechanism for described in be rotationally connected.
Preferably, described movable rod organization establishes has two, and described crank assembly comprises crank body and axis; Wherein, the shape of described crank body is columniform two bottom surfaces of chip is form relative to two oval inclined-planes of separated time symmetry in described columniform radial direction, described two oval inclined-planes all have the crank pit of identical loop configuration, described kelly in a described movable rod mechanism snaps in a described crank pit, and the described kelly in movable rod mechanism described in another snaps in crank pit described in another; Described axis is through described crank body, and the end at described axis two ends is connected to described power set.
Preferably, described movable rod mechanism also comprises connecting rod load base, is installed on the second table top, supports the middle part of described urceolus.
Preferably, described scissor dynamic formula oil pumper also comprises reducer, is connected between described axis and described power set.
Preferably, described crank assembly also comprises balance weight, and the revealed section of described axis falls in described balance weight.
One or more technical scheme provided by the present invention, at least has following technique effect or advantage:
Scissor dynamic formula oil pumper provided by the invention moves by scissor the up-downgoing that device drives pump rod in well, the commutator of upper and lower stroke is carried out as pump rod in balance and well again by crank assembly, achieve scissor work, thus pump rod drives oil well pump work in winding shaft, achieve a kind of structure Pumping Unit that is simple, scissor-type power delivery mode reliably.
Further, because the structure of scissor dynamic formula oil pumper provided by the invention is simpler compared to existing technology, thus floor space is less, and energy consumption is lower, safeguards more convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the overall structure schematic diagram of scissor dynamic formula oil pumper in the present invention;
Fig. 2 is the structural representation of one-level scissor motivation structure in the present invention;
Fig. 3 be in the present invention scissor motivation structure B-B to when approaching to minimum range and crank assembly, connection diagram between movable rod mechanism;
Fig. 4 is the structural representation of movable rod mechanism in the present invention;
Fig. 5 is the front view of crank assembly in the present invention;
Fig. 6 is the left view of crank assembly in the present invention;
Fig. 7 be in the present invention scissor motivation structure A-A to when approaching to minimum range and crank assembly, connection diagram between movable rod mechanism.
Detailed description of the invention
Complicated in order to solve rod pumping pump Pumping Unit of the prior art, the technical problem of operation maintenance complexity, embodiments provide a kind of scissor dynamic formula oil pumper that is simple, scissor-type power delivery mode reliably, general thought is as follows:
The present invention is installed with pulley on the top of main frame, wire rope strides across pulley, one end of wire rope be connected to be connected with oil well pump well in pump rod, the other end is fixed on the upper end that scissor moves device, scissor moves the lower end of device and movable rod mechanism for being rotationally connected, movable rod mechanism and the clamping of crank assembly, crank assembly connects power set;
By the scissor dynamic formula oil pumper of said structure, scissor moves the up-downgoing that device drives pump rod in well, the commutator of upper and lower stroke is carried out as pump rod in balance and well again by crank assembly, achieve scissor work, thus pump rod drives oil well pump work in winding shaft, achieve the Pumping Unit of the reliable scissor-type power delivery mode of a kind of structure.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Scissor dynamic formula oil pumper provided by the present invention is connected with oil well pump in well, below, with reference to figure 1 ~ Fig. 6, the structure of scissor dynamic formula oil pumper provided by the present invention is described in detail:
As shown in Figure 1, scissor dynamic formula oil pumper provided by the invention comprises following structure: main frame 1, wire rope 2, and scissor moves device 3, crank assembly 4, power set 5, pulley 6, movable rod mechanism 7.
The top of main frame 1 is installed with at least two pulleys 6, wire rope 2 strides across at least two pulleys 6, pump rod in the well that one end of wire rope 2 is connected to oil well pump in well, the other end of wire rope 2 fixes the upper end that scissor moves device 3, scissor moves the lower end of device 3 and movable rod mechanism 7 for being rotationally connected, movable rod mechanism 7 and crank assembly 4 are connected together, and crank assembly 4 connects power set 5; Wherein, power set 5 provide power to crank assembly 4, the movable rod mechanism 7 that rotarily drives of crank assembly 4 carries out horizontal movement, the horizontal movement drive scissor of crank assembly 4 moves device 3 and carries out scissor motion, the scissor motion that scissor moves device 3 drives wire rope 2 to move around pulley 6, to drive the up-downgoing of pump rod in well.
Technical scheme of the present invention, the up-downgoing that device 3 drives pump rod in well is moved by scissor, carry out the commutator of upper and lower stroke by crank assembly 4 as pump rod in balance and well again, achieve scissor work, to reach in winding shaft pump rod to drive the object of oil well pump work.
Below with reference to Fig. 2 ~ Fig. 7, each parts of scissor dynamic formula oil pumper are described in detail:
Scissor moves device 3 and is formed by connecting by multistage mutually isostructural scissor motivation structure.Below, carry out citing with reference to figure 1 pair of one-level scissor motivation structure and describe, structure is identical all with it for every grade of scissor motivation structure, succinct in order to manual, does not just describe one by one.
As shown in Figure 2, one-level scissor motivation structure comprises: scissors rod 8, scissors rod 9 and clutch shaft bearing pair 10.The middle part of scissors rod 8 and two ends all have through hole, and the middle part of scissors rod 9 and two ends all have through hole, connect the through hole in the middle part of scissors rod 8 and in the middle part of scissors rod 9 by clutch shaft bearing secondary 10.Concrete, the through hole on scissors rod 8 and scissors rod 9 is the circular port perpendicular to scissors rod axis.Concrete, clutch shaft bearing pair 10 is two bearings and an inserted link composition, in through hole in the middle part of scissors rod 8, a bearing is installed, in through hole in the middle part of scissors rod 9, a bearing is installed, with an inserted link through the bearing in the middle part of two scissors rods 8,9, two scissors rods 8,9 are linked together, makes scissors rod 8,9 take inserted link as the rotation that certain angle is made in the center of circle respectively.
As shown in Figure 3, scissor moves device 3 and also comprises multiple second bearing pair 11, connects scissors rod 8 end of inter-stage and the through hole of scissors rod 9 end by second bearing pair 11.Such as, in figure 3, the bottom of the upper end of the scissors rod 8 of first order scissor motivation structure and the scissors rod 9 of upper level scissor motivation structure is linked together by second bearing pair 11; The bottom of the upper end of the scissors rod 9 of first order scissor motivation structure and the scissors rod 9 of upper level scissor motivation structure is linked together by another second bearing pair 11, and the connection of other inter-stage scissor motivation structures is also with reference to figure 3 and aforementioned citing.The scissor motivation structure of this spline structure, as shown in Figure 2, scissors rod 8 at the same level and scissors rod 9 A-A to close to time, in well, pump rod is descending, and drives oil well pump descending; When peer scissors rod 8 and scissors rod 9 B-B to close to time, in well, pump rod is up, and drives oil well pump up.
In specific implementation process, the progression of cascade scissor motivation structure sets to meet oil well pump stroke jig frequency, does not limit herein.
Concrete, as shown in Figure 4, movable rod mechanism 7 comprises urceolus 12, inner core 13, kelly 14.Concrete, urceolus 12 is enclosed within inner core 13, and the exposed junction of inner core 13 is fixed on the first platform C, and the end winding support of urceolus 12 kelly 14, and one end of kelly 14 snaps in crank assembly 4, makes movable rod machine 7 and crank assembly 4 be clamping.Urceolus 12 is also provided with connect base 15, such as, connect base 15 can be fixed by welding on urceolus 12 side, specifically when installing, connect base 15 be forward upward.As shown in Figure 3, the bottom of the scissors rod 8,9 of first order scissor motivation structure is installed on by the second bearing pair 11 and connects on base 15.
In specific implementation process, as shown in Figure 3, be provided with the two mutually isostructural movable rod mechanisms 7 of cover, the installation site of Liang Ge movable rod mechanism 7 is the both sides that level is installed on crank assembly 4, Liang Tao movable rod mechanism 7 keeps in the same horizontal line, and the central point of Liang Tao movable rod mechanism 7 is aligned with each other.Then concrete, as shown in Figure 3, the bottom of the scissors rod 8 of first order scissor motivation structure is installed on by second bearing pair 11 on the connection base 15 of left side movable rod mechanism 7, the bottom of the scissors rod 9 of first order scissor motivation structure is installed on the connection base 15 of right side movable rod mechanism 7 by another second bearing pair 11, thus makes scissor move the lower end of device 3 and Liang Ge movable rod mechanism 7 for being rotationally connected.
Mechanism 7 is corresponding with Liang Tao movable rod, and as shown in Figure 3, crank assembly 4 comprises crank body 16 and axis 19.Specifically as shown in Figure 5 and Figure 6, the shape of crank body 16 is: through columniform two bottom surfaces of chip be relative to columniform radial direction in two oval inclined-planes of separated time symmetry form, two oval inclined-planes have the crank pit 17,18 of identical loop configuration, concrete, crank pit 17,18 has consistent width and the consistent degree of depth.Crank pit 17,18, for the effect guided of having moved to scissor, guarantees scissor reliability of operation.Concrete, crank pit 17,18 is the annular around oval inclined-plane.
Concrete, as shown in Figure 3, the kelly 14 of the movable rod mechanism 7 in left side snaps in crank pit 17, and the kelly 14 of the movable rod mechanism 7 on right side snaps in crank pit 18.Axis 19 is through to be fixed together after crank body 16 or one-body molded with crank body 16.Concrete, the equal connecting power device 5 in end at axis 19 two ends.
In specific implementation process, the width of crank assembly 4 can regulate length of stroke.
Further, crank assembly 4 provided by the present invention also comprises two balance weights 20, is separately positioned on the both sides of crank body 16, and the both sides revealed section of axis 19 falls in balance weight 20.Thus the balance movement of crank assembly 4 when ensure that in well, pump rod moves up and down.
By the structure of the crank assembly 4 of foregoing description, the structure of movable rod mechanism 7 and annexation between the two can be found out, axis 19 transmits power to crank body 16, when crank body 16 rotates, the kelly 14 of crank pit 17,18 just in Liang Ge movable rod mechanism 7 moves, outer squeezing and the effect of unclamping is produced to kelly 14, has driven urceolus 12 extending out in the horizontal direction to move with interior, thus control scissor motivation structure not at the same level close to and away from.
Concrete, the steel work that main frame 1 forms for girder steel, the bottom of main frame 1 is arranged in ground base, and the middle part of main frame 1 is also fixed wtih scissor by welding or bolt and moves device 3.
Further, as shown in Figure 3, in order to make movable rod mechanism 7 more stable, for urceolus 12 is provided with connecting rod load base 21, be installed on the second platform D.Concrete, the first platform C and the second platform D is the middle part that vertical relation is supported in urceolus 12.
Further, in order to obtain the rotating speed required for beam-pumping unit jig frequency, scissor dynamic formula oil pumper provided by the present invention also comprises reducer 22, is connected between two ends of axis 19 and power set 5.
Below, the operating principle of the scissor dynamic formula oil pumper under most preferred embodiment provided by the present invention and process are described:
Power set 5 drive two reducers 22, rotating speed required for beam-pumping unit jig frequency is passed to crank body 16 by axis 19, the rotation of crank body 16 can be pushed and unclamp and is stuck in crank pit 17, two kellies 14 in 18, the motion of two kellies 14 will drive two urceolus 12 in the horizontal direction near and away from, thus drive scissor to move elongation and the shortening of device 3, drive scissor to move the elongation of device 3 and shortening scissor can be driven to move the fixing wire rope 2 in device 3 top be driven and slide around pulley 6, concrete, as shown in Figure 3, that the crank body 16 of crank assembly 4 is when rectifying upward greatly, connecting rod 14 and urceolus 12 has been driven to move to ultimate range, the stage distance that scissor moves device 3 is now minimum, in well, pump rod is up and drive downhole pump to move to top, as shown in Figure 7, when to be that the crank body 16 of crank assembly 4 is little rectify upward, driven connecting rod 14 and urceolus 12 to move to minimum range, the stage distance that scissor moves device 3 is now maximum, in well, pump rod has gone downwards to bottom or by up, and drives downhole pump down to dead-centre position.Other point is the middle operating condition between Fig. 3 and Fig. 7.
Pump rod in well is promoted and transferred, completes the work of oil pumper.
Can be found out by the description of the above-mentioned course of work, scissor dynamic formula oil pumper operating principle provided by the present invention mainly by a kind of scissor structure as shown in Figure 2 and Figure 3 horizontal and vertical close to or away from the up-downgoing driving roofbolt, again by the crank structure of the trough of belt as shown in Figure 5, Figure 6 commutator as balance and the upper and lower stroke of bar, achieve the work of scissor structure, pump rod in winding shaft, drives oil well pump to move up and down.
In a particular application, the weight of scissor dynamic formula oil pumper provided by the present invention is less than the weight that pump rod in well adds fluid column, makes scissor move device 3 and is in tension state always, make the normal work that ensure that scissor dynamic formula oil pumper provided by the present invention.
One or more technical schemes that the embodiment of the present invention provides, at least have following technique effect or advantage:
The up-downgoing that device drives pump rod in well is moved by scissor, the commutator of upper and lower stroke is carried out as pump rod in balance and well again by crank assembly, achieve scissor work, thus pump rod drives oil well pump work in winding shaft, achieve a kind of structure Pumping Unit that is simple, scissor-type power delivery mode reliably.
Further, because the structure of scissor dynamic formula oil pumper provided by the invention is simpler compared to existing technology, thus floor space is less, and energy consumption is lower, safeguards more convenient.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a scissor dynamic formula oil pumper, is connected with oil well pump in well, it is characterized in that, described scissor dynamic formula oil pumper comprises: main frame, wire rope, and scissor moves device, crank assembly, power set, pulley, movable rod mechanism;
The top of described main frame is installed with described pulley, described wire rope strides across described pulley, one end of described wire rope is connected to pump rod in the described well be connected with oil well pump, the other end of described wire rope is fixed on the upper end that described scissor moves device, described scissor moves the lower end of device and described movable rod mechanism for being rotationally connected, described movable rod mechanism and the clamping of described crank assembly, described crank assembly connects power set;
Wherein, described power set provide power to described crank assembly, the described movable rod mechanism that rotarily drives of described crank assembly carries out horizontal movement, described horizontal movement drives described scissor to move device to carry out scissor motion, described scissor motion drives described wire rope around described pulley motion, to drive the up-downgoing of pump rod in described well.
2. scissor dynamic formula oil pumper as claimed in claim 1, it is characterized in that, described scissor moves device and is formed by connecting by multistage mutually isostructural scissor motivation structure, and every grade of described scissor motivation structure comprises two scissors rods, clutch shaft bearing pair;
Wherein, middle part and the end of each described scissors rod all have through hole, connect the through hole in the middle part of two described scissors rods at the same level by described clutch shaft bearing pair.
3. scissor dynamic formula oil pumper as claimed in claim 2, it is characterized in that, described scissor moves device and also comprises multiple second bearing pair, is connected the through hole of two described scissors rod ends of adjacent two-stage by described second bearing pair.
4. scissor dynamic formula oil pumper as claimed in claim 3, it is characterized in that, described movable rod mechanism comprises: urceolus, inner core, kelly, described urceolus is enclosed within described inner core, the exposed junction of described inner core is fixed on the first table top, the end winding support of described urceolus described kelly, and described kelly snaps in described crank assembly, to make described movable rod mechanism and described crank assembly be described clamping;
The bottom of a described scissors rod of scissor motivation structure described in the first order is installed on described urceolus by described second bearing pair, make described scissor move the lower end of device and described movable rod mechanism for described in be rotationally connected.
5. scissor dynamic formula oil pumper as claimed in claim 4, it is characterized in that, described movable rod organization establishes has two, and described crank assembly comprises crank body and axis;
Wherein, the shape of described crank body is columniform two bottom surfaces of chip is form relative to two oval inclined-planes of separated time symmetry in described columniform radial direction, described two oval inclined-planes all have the crank pit of identical loop configuration, described kelly in a described movable rod mechanism snaps in a described crank pit, and the described kelly in movable rod mechanism described in another snaps in crank pit described in another;
Described axis is through described crank body, and the end at described axis two ends is connected to described power set.
6. scissor dynamic formula oil pumper as claimed in claim 4, it is characterized in that, described movable rod mechanism also comprises connecting rod load base, is installed on the second table top, supports the middle part of described urceolus.
7. scissor dynamic formula oil pumper as claimed in claim 5, it is characterized in that, described scissor dynamic formula oil pumper also comprises reducer, is connected between described axis and described power set.
8. scissor dynamic formula oil pumper as claimed in claim 5, it is characterized in that, described crank assembly also comprises balance weight, and the revealed section of described axis falls in described balance weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510379371.XA CN105003231B (en) | 2015-07-01 | 2015-07-01 | Scissor dynamic formula oil pumper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510379371.XA CN105003231B (en) | 2015-07-01 | 2015-07-01 | Scissor dynamic formula oil pumper |
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| Publication Number | Publication Date |
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| CN105003231A true CN105003231A (en) | 2015-10-28 |
| CN105003231B CN105003231B (en) | 2018-01-02 |
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| CN201510379371.XA Active CN105003231B (en) | 2015-07-01 | 2015-07-01 | Scissor dynamic formula oil pumper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464633A (en) * | 2016-01-05 | 2016-04-06 | 中国民航大学 | Scissors fork type extended-range pumping unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505162A (en) * | 1982-07-22 | 1985-03-19 | Advanced Pumping Systems, Inc. | Oil well pumping apparatus and method |
| CN87209044U (en) * | 1987-06-09 | 1988-07-13 | 王自治 | Tower type extended-range oil-pumping unit with single arm sliding beam |
| CN2198412Y (en) * | 1994-04-11 | 1995-05-24 | 俞淳植 | Oil pumping machine |
| US6217260B1 (en) * | 1998-07-10 | 2001-04-17 | Dexin He | Downhole reamer with double acting dual piston cylinder |
| CN201443370U (en) * | 2009-04-20 | 2010-04-28 | 中国石油化工股份有限公司胜利油田分公司孤东采油厂 | Long-stroke energy-saving oil extractor |
-
2015
- 2015-07-01 CN CN201510379371.XA patent/CN105003231B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505162A (en) * | 1982-07-22 | 1985-03-19 | Advanced Pumping Systems, Inc. | Oil well pumping apparatus and method |
| CN87209044U (en) * | 1987-06-09 | 1988-07-13 | 王自治 | Tower type extended-range oil-pumping unit with single arm sliding beam |
| CN2198412Y (en) * | 1994-04-11 | 1995-05-24 | 俞淳植 | Oil pumping machine |
| US6217260B1 (en) * | 1998-07-10 | 2001-04-17 | Dexin He | Downhole reamer with double acting dual piston cylinder |
| CN201443370U (en) * | 2009-04-20 | 2010-04-28 | 中国石油化工股份有限公司胜利油田分公司孤东采油厂 | Long-stroke energy-saving oil extractor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464633A (en) * | 2016-01-05 | 2016-04-06 | 中国民航大学 | Scissors fork type extended-range pumping unit |
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| CN105003231B (en) | 2018-01-02 |
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