CN105003231B - Scissor dynamic formula oil pumper - Google Patents
Scissor dynamic formula oil pumper Download PDFInfo
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- CN105003231B CN105003231B CN201510379371.XA CN201510379371A CN105003231B CN 105003231 B CN105003231 B CN 105003231B CN 201510379371 A CN201510379371 A CN 201510379371A CN 105003231 B CN105003231 B CN 105003231B
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- scissor
- crank
- dynamic formula
- oil pumper
- movable rod
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Abstract
The invention discloses a kind of scissor dynamic formula oil pumper, it is horizontal and vertical close to or away from driving the up-downgoing of roofbolt by scissor structure, further through commutator of the crank structure as stroke above and below balance and bar, realize the work of scissor structure, reach pump rod in winding shaft, oil well pump is driven to move up and down, so as to solve rod pumping pump Pumping Unit complexity in the prior art, the complicated technical problem of operation maintenance.Realize a kind of scissor dynamic formula oil pumper of simple, reliable scissor-type power delivery mode.The top of the main frame of the scissor dynamic formula oil pumper is installed with pulley, steel wire rope is across pulley, one end of steel wire rope is connected to pump rod in the well that is connected with oil well pump, the other end of steel wire rope is fixed on the upper end that scissor moves device, scissor moves the lower end of device and movable rod mechanism is rotation connection, movable rod mechanism and crank assembly clamping, crank assembly connect a power set.
Description
Technical field
The present invention relates to the machinery equipment field of exploitation oil, more particularly to a kind of scissor dynamic formula oil pumper.
Background technology
At present, sucker-rod pumping lifting technology oil pumper is used widely in oil field development production, using reliable,
It is stable, it is the main surface technology that onshore oil field recovers the oil.Its main operational principle is by power caused by motor, passes through change
The drives such as fast case, crank, connecting rod, walking beam, horse head and polished rod eye oil pumping pump rod, and then drive oil well pump to pump,
Crude oil in stratum is given rise into ground.
Current rod pumping pump oil pumper mainly has：Conventional beam-pumping unit, belt type pumping unit, composite permanent magnetism electricity
Machine oil pumper.Conventional beam-pumping unit mainly passes through walking beam passing power；Defect is that floor space is big, high energy consumption, gross weight
Tonnage is big, complicated etc..Belt type pumping unit mainly passes through wide belt passing power, the wide skin of critical piece passing power
Complex process with power, oil sucking machine of compound permanent magnet motor operation maintenance trouble.
It can be seen that existing rod pumping pump Pumping Unit is complicated, operation maintenance is complicated.
The content of the invention
It is an object of the invention to provide a kind of oil pumping of the scissor dynamic formula of simple, reliable scissor-type power delivery mode
Machine, to solve rod pumping pump Pumping Unit complexity of the prior art, the complicated technical problem of operation maintenance.
Scissor dynamic formula oil pumper provided by the invention includes：Main frame, steel wire rope, scissor move device, crank assembly, power
Device, pulley, movable rod mechanism；The top of the main frame is installed with the pulley, the steel wire rope across the pulley,
One end of the steel wire rope is connected to pump rod in the well that is connected with the oil well pump, and the other end of the steel wire rope is fixed on described
Scissor moves the upper end of device, and the scissor moves the lower end of device and the movable rod mechanism is rotation connection, and the activity is even
Linkage and the crank assembly clamping, the crank assembly connect a power set；Wherein, the power set give the song
Handle assembly provides power, and the rotation of the crank assembly drives the movable rod mechanism to carry out horizontal movement, the horizontal fortune
Dynamic to drive the scissor to move device to carry out scissor motion, the scissor motion drives the steel wire rope around the pulley motion, with
Drive the up-downgoing of pump rod in the well.
Preferably, the scissor moves device and is formed by connecting by multistage mutually isostructural scissor motivation structure, every grade of scissor
Motivation structure includes two scissors rods, clutch shaft bearing pair；Wherein, the middle part of each scissors rod and end are provided with through hole, lead to
The through hole crossed in the middle part of the secondary connection of the clutch shaft bearing two scissors rods at the same level.
Preferably, the scissor, which moves device, also includes multiple second bearing pairs, passes through the secondary connection of a second bearing
The through hole of two scissor boom ends of adjacent two-stage.
Preferably, the movable rod mechanism includes：Outer barrel, inner cylinder, kelly, the outer sleeve is on the inner cylinder, institute
The exposed junction for stating inner cylinder is fixed on the first table top, the fixed kelly in end of the outer barrel, and the kelly is caught in the song
Handle assembly, to cause the movable rod mechanism with the crank assembly as the clamping；Scissor motivation structure described in the first order
The bottom of one scissors rod is installed on the outer barrel by a second bearing pair so that the dynamic dress of the scissor
The lower end put and the movable rod mechanism are the rotation connection.
Preferably, the movable rod mechanism is provided with two, and the crank assembly includes crank body and axis；Its
In, two bottom surfaces for being shaped as chip cylinder of the crank body are symmetrical relative to the cylindrical radial direction middle separated time
Two oval inclined-planes form, the crank pit of identical loop configuration, the work are provided with described two oval inclined-planes
The kelly on dynamic linkage is caught in a crank pit, the kelly in another described movable rod mechanism
It is caught in another described crank pit；The axis passes through the crank body, and the end at the axis both ends is connected to described
Power set.
Preferably, the movable rod mechanism also includes connecting rod load base, is installed on the second table top, supports described outer
The middle part of cylinder.
Preferably, the scissor dynamic formula oil pumper also includes decelerator, be connected to the axis and the power set it
Between.
Preferably, the crank assembly also includes balance weight, and the revealed section of the axis is fallen into the balance weight.
One or more technical schemes provided by the present invention, have at least the following technical effects or advantages：
Scissor dynamic formula oil pumper provided by the invention moves the up-downgoing of pump rod in device drive well by scissor, further through song
Handle assembly carries out the commutator of stroke up and down as pump rod in balance and well, scissor work is realized, so as to pump rod in winding shaft
To drive oil pumping pump work, a kind of Pumping Unit of scissor-type power delivery mode simple in construction, reliable is realized.
Further, because the structure of scissor dynamic formula oil pumper provided by the invention is simpler compared with prior art, so as to account for
Ground area is smaller, and energy consumption is lower, safeguards more convenient.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the overall structure 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 for the present invention in scissor motivation structure B-B to close to during minimum range with crank assembly, movable rod mechanism
Between connection diagram；
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 for the present invention in scissor motivation structure A-A to close to during minimum range with crank assembly, movable rod mechanism
Between connection diagram.
Embodiment
Rod pumping pump Pumping Unit of the prior art is complicated in order to solve, the complicated technical problem of operation maintenance,
The embodiments of the invention provide a kind of scissor dynamic formula oil pumper of simple, reliable scissor-type power delivery mode, general thought
It is as follows：
The present invention is installed with pulley on the top of main frame, and steel wire rope is connected to and taken out across pulley, one end of steel wire rope
Pump rod in the connected well of oil pump, the other end are fixed on the upper end that scissor moves device, and scissor moves lower end and the movable rod of device
Mechanism is rotation connection, movable rod mechanism and crank assembly clamping, and crank assembly connects a power set；
By the scissor dynamic formula oil pumper of said structure, scissor moves the up-downgoing that device drives pump rod in well, further through song
Handle assembly carries out the commutator of stroke up and down as pump rod in balance and well, scissor work is realized, so as to pump rod in winding shaft
To drive oil pumping pump work, a kind of Pumping Unit of the reliable scissor-type power delivery mode of structure is realized.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs 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 1~Fig. 6 of figure to this hair
The structure of bright provided scissor dynamic formula oil pumper is described in detail：
As shown in figure 1, scissor dynamic formula oil pumper provided by the invention includes following structure：Main frame 1, steel wire rope 2, scissor
Dynamic device 3, crank assembly 4, power set 5, pulley 6, movable rod mechanism 7.
The top of main frame 1 is installed with least two pulleys 6, and steel wire rope 2 is across at least two pulleys 6, and the one of steel wire rope 2
End is connected in well pump rod in the well of oil well pump, and the other end of steel wire rope 2 fixes the upper end that scissor moves device 3, and scissor moves device 3
Lower end and movable rod mechanism 7 be rotation connection, movable rod mechanism 7 is connected together with crank assembly 4, crank assembly 4
Connect a power set 5；Wherein, power set 5 provide power to crank assembly 4, and the rotation of crank assembly 4 drives movable rod
Mechanism 7 carries out horizontal movement, and the horizontal movement of crank assembly 4 drives scissor to move device 3 and carries out scissor motion, and scissor moves device 3
Scissor motion drive steel wire rope 2 moved around pulley 6, to drive the up-downgoing of pump rod in well.
Technical scheme, the up-downgoing of pump rod in the drive well of device 3 is moved by scissor, further through crank assembly 4
The commutator of stroke up and down is carried out as pump rod in balance and well, realizes scissor work, reaches in winding shaft pump rod to drive
The purpose of oil pumping pump work.
Each part of scissor dynamic formula oil pumper is described in detail below with reference to Fig. 2~Fig. 7：
Scissor moves device 3 and is formed by connecting by multistage mutually isostructural scissor motivation structure.Below, with reference to figure 1 to one-level scissor
Motivation structure carries out citing description, and structure is identical therewith for every grade of scissor motivation structure, succinct for specification, does not just describe one by one
.
As shown in Fig. 2 one-level scissor motivation structure includes：Scissors rod 8, scissors rod 9 and clutch shaft bearing pair 10.Scissors rod 8
Middle part and two ends are provided with through hole, and the middle part of scissors rod 9 and two ends are provided with through hole, are connected by clutch shaft bearing pair 10
Connect the through hole at the middle part of scissors rod 8 and the middle part of scissors rod 9.Specifically, the through hole on scissors rod 8 and scissors rod 9 is perpendicular to cutting
The circular port of fork arm axis.Specifically, clutch shaft bearing pair 10 is two bearings and an inserted link composition, the middle part of scissors rod 8 leads to
One bearing is installed in hole, a bearing is installed in the through hole at the middle part of scissors rod 9, two scissors rods 8,9 are passed through with an inserted link
The bearing at middle part, two scissors rods 8,9 are linked together so that scissors rod 8,9 makees certain angle respectively by the center of circle of inserted link
Rotation.
As shown in figure 3, scissor, which moves device 3, also includes multiple second bearing pairs 11, connected by a second bearing pair 11
The through hole of the end of scissors rod 8 and the end of scissors rod 9 between level.For example, shown in figure 3, first order scissor motivation structure is cut
The upper end of fork arm 8 and the bottom of the scissors rod 9 of upper level scissor motivation structure are connected to one by a second bearing pair 11
Rise；The upper end of the scissors rod 9 of first order scissor motivation structure and the bottom of the scissors rod 9 of upper level scissor motivation structure pass through another
One second bearing pair 11 links together, and the connection of scissor motivation structure is referring also to Fig. 3 and foregoing citing between other grades.So tie
The scissor motivation structure of structure, as shown in Fig. 2 scissors rod 8 at the same level and scissors rod 9 A-A to it is close when, pump rod is descending in well
, and drive oil well pump descending；When the scissors rod 8 of peer is close in B-B direction with scissors rod 9, pump rod is up in well, and
Drive oil well pump up.
In specific implementation process, the series for cascading scissor motivation structure is set with meeting oil pumping pump stroke jig frequency,
Herein without limiting.
Specifically, as shown in figure 4, movable rod mechanism 7 includes outer barrel 12, inner cylinder 13, kelly 14.Specifically, outer barrel 12
It is enclosed on inner cylinder 13, the exposed junction of inner cylinder 13 is fixed on the first platform C, the fixed kelly 14 in end of outer barrel 12, kelly 14
One end be caught in crank assembly 4 so that movable rod machine 7 and crank assembly 4 are clamping.Connect base is additionally provided with outer barrel 12
15, such as, connect base 15 can be fixed by welding on the side of outer barrel 12, specifically when installing, connect base
15 be it is positive upward.As shown in figure 3, the bottom of the scissors rod 8,9 of first order scissor motivation structure passes through second bearing pair 11
It is installed in connect base 15.
In specific implementation process, as shown in figure 3, being provided with two sets of mutually isostructural movable rod mechanisms 7, two activities
The installation site of linkage 7 is to be horizontally installed to the both sides of crank assembly 4, and Liang Tao movable rods mechanism 7 is to protect when mounted
Hold in the same horizontal line, and the central point of Liang Tao movable rods mechanism 7 is aligned with each other.Then specifically, as shown in figure 3, first
The bottom of the scissors rod 8 of level scissor motivation structure is installed on the company of left side movable rod mechanism 7 by a second bearing pair 11
Connect on base 15, the bottom of the scissors rod 9 of first order scissor motivation structure is installed on right side by another second bearing pair 11
In the connect base 15 of movable rod mechanism 7, so that it is to turn that scissor, which moves the lower end of device 3 and Liang Ge movable rods mechanism 7,
Dynamic connection.
Mechanism 7 is corresponding with Liang Tao movable rods, as shown in figure 3, crank assembly 4 includes crank body 16 and axis 19.
Specifically as shown in Figure 5 and Figure 6, crank body 16 is shaped as：Two bottom surfaces by chip cylinder are relative to cylinder
The symmetrical two oval inclined-planes of radial direction middle separated time form, the crank pit of identical loop configuration is provided with two oval inclined-planes
17th, 18, specifically, crank pit 17,18 has consistent width and consistent depth.Crank pit 17,18 is used to move scissor guiding
Effect, it is ensured that scissor reliability of operation.Specifically, crank pit 17,18 is the annular around oval inclined-plane.
Specifically, as shown in figure 3, the kelly 14 of the movable rod mechanism 7 in left side is caught in crank pit 17, the activity on right side
The kelly 14 of linkage 7 is caught in crank pit 18.Axis 19 pass through crank body 16 after be fixed together or with crank sheet
Body 16 is integrally formed.Specifically, the end at the both ends of axis 19 is all connected with power set 5.
In specific implementation process, the width of crank assembly 4 can adjust length of stroke.
Further, crank assembly 4 provided by the present invention also includes two balance weights 20, is separately positioned on crank body 16
Both sides, the both sides revealed section of axis 19 fallen into balance weight 20.Ensure that crank is total when pump rod moves up and down in well
Into 4 balance movement.
By the structure of the crank assembly 4 of foregoing description, the structure of movable rod mechanism 7 and connection between the two are closed
System is as can be seen that axis 19 gives the passing power of crank body 16, and when crank body 16 rotates, crank pit 17,18 is just around two
Kelly 14 in movable rod mechanism 7 is moved, and the outer effect squeezed and unclamped is produced to kelly 14, has driven outer barrel 12 in level side
It is upward extend out with interior shifting, so as to control scissor motivation structure not at the same level closer and farther from.
Specifically, main frame 1 is the steel construction of girder steel composition, the bottom of main frame 1 is arranged in ground base, main frame
Device 3 is also moved by welding or the fixed scissor of bolt in 1 middle part.
Further, as shown in figure 3, in order that movable rod mechanism 7 is more stable, outer barrel 12 is provided with connecting rod load bottom
Seat 21, is installed on the second platform D.It is supported in specifically, the first platform C and the second platform D is vertical relation in outer barrel 12
Portion.
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 is also
Including decelerator 22, it is connected between two ends of axis 19 and power set 5.
Below, to the operation principle and process of the scissor dynamic formula oil pumper under most preferably embodiment provided by the present invention
It is described：
Power set 5 drive two decelerators 22, and the rotating speed required for beam-pumping unit jig frequency is passed into song by axis 19
Two kellies 14 being stuck in crank pit 17,18, two kellies 14 can be pushed and unclamped to handle body 16, the rotation of crank body 16
Motion will drive two outer barrels 12 in the horizontal direction close and remote, so as to drive scissor to move the elongation and contracting of device 3
Short, driving scissor to move the elongation of device 3 and shortening can drive the steel wire rope 2 of the dynamic top of device 3 fixation of scissor to be driven around pulley 6
Enter line slip, specifically, as shown in figure 3, when being that the crank body 16 of crank assembly 4 is rectified upward greatly, drive the He of connecting rod 14
Outer barrel 12 is run to ultimate range, and the stage distance that scissor moves device 3 is now minimum, and pump rod is up in well and drives underground
Pump operation pump to top；As shown in fig. 7, be crank assembly 4 crank body 16 it is small rectify upward when, driven the He of connecting rod 14
Outer barrel 12 is run to minimum range, and the stage distance that scissor moves device 3 is now maximum, in well pump rod gone downwards to bottom or
I.e. will be up, and drive under downhole pump to dead-centre position.Other points are the middle running situation between Fig. 3 and Fig. 7.
Pump rod in well is lifted and transferred, completes the work of oil pumper.
Scissor dynamic formula oil pumper operation principle master provided by the present invention can be seen that by the description of the above-mentioned course of work
If horizontal and vertical close to or away from driving the up-downgoing of roofbolt by a kind of scissor structure as shown in Figure 2 and Figure 3,
Further through commutator of the crank structure of trough of belt as shown in Figure 5, Figure 6 as stroke above and below balance and bar, scissor knot is realized
The work of structure, pump rod in winding shaft, oil well pump is driven 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 of pump rod liquid feeding post in well
Amount so that scissor moves device 3 and is constantly in tension state so that ensure that scissor dynamic formula oil pumper provided by the present invention just
Often work.
One or more technical schemes that the embodiment of the present invention is provided, have at least the following technical effects or advantages：
The up-downgoing of pump rod in device drive well is moved by scissor, is entered further through crank assembly as pump rod in balance and well
The commutator of row stroke up and down, realize scissor work, so as to which pump rod drives oil pumping pump work in winding shaft, realizes one kind
The Pumping Unit of simple in construction, reliable scissor-type power delivery mode.
Further, because the structure of scissor dynamic formula oil pumper provided by the invention is simpler compared with prior art, so as to account for
Ground area is smaller, and energy consumption is lower, safeguards more convenient.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of scissor dynamic formula oil pumper, is connected with oil well pump in well, it is characterised in that the scissor dynamic formula oil pumper includes：
Main frame, steel wire rope, scissor move device, crank assembly, power set, pulley, movable rod mechanism；
The top of the main frame is installed with the pulley, and the steel wire rope connects across the pulley, one end of the steel wire rope
Then pump rod in the well being connected with oil well pump, the other end of the steel wire rope are fixed on the upper end that the scissor moves device,
It is rotation connection that the scissor, which moves the lower end of device and the movable rod mechanism, and the movable rod mechanism and the crank are total
Into clamping, the crank assembly connects a power set；
Wherein, the power set provide power to the crank assembly, and the rotation of the crank assembly drives the activity even
Linkage carries out horizontal movement, and the horizontal movement drives the scissor to move device and carries out scissor motion, and the scissor moves band
The steel wire rope is moved around the pulley motion, to drive the up-downgoing of pump rod in the well；
The movable rod mechanism includes mutually isostructural two sets, and Liang Tao movable rods mechanism is horizontally installed to the two of crank assembly
Side, Liang Tao movable rods mechanism are to maintain in the same horizontal line when mounted, and the central point of Liang Tao movable rods mechanism is mutual
Align, wherein, often covering the movable rod mechanism includes：Outer barrel, inner cylinder, kelly, the outer sleeve is on the inner cylinder, institute
The exposed junction for stating inner cylinder is fixed on the first table top, the fixed kelly in end of the outer barrel, and the kelly is caught in the song
Handle assembly, to cause the movable rod mechanism with the crank assembly as the clamping；
The crank assembly includes crank body and axis；Wherein, two that are shaped as chip cylinder of the crank body
Bottom surface is forms relative to the symmetrical two oval inclined-planes of the cylindrical radial direction middle separated time, on described two oval inclined-planes
It is provided with the crank pit of identical loop configuration, the kelly in a movable rod mechanism is caught in a crank pit
Interior, the kelly in another described movable rod mechanism is caught in another described crank pit；The axis is described in
Crank body, the end at the axis both ends are connected to the power set.
2. scissor dynamic formula oil pumper as claimed in claim 1, it is characterised in that the scissor moves device by multistage identical structure
Scissor motivation structure be formed by connecting, every grade of scissor motivation structure includes two scissors rods, clutch shaft bearing pair；
Wherein, the middle part of each scissors rod and end are provided with through hole, pass through the two of the secondary connection peer of the clutch shaft bearing
Through hole in the middle part of the individual scissors rod.
3. scissor dynamic formula oil pumper as claimed in claim 2, it is characterised in that the scissor, which moves device, also includes multiple second
Bearing pair, pass through the through hole of the secondary two scissor boom ends for connecting adjacent two-stage of a second bearing.
4. scissor dynamic formula oil pumper as claimed in claim 3 a, it is characterised in that institute of scissor motivation structure described in the first order
The bottom for stating scissors rod is installed on the outer barrel by a second bearing pair so that the scissor is moved under device
End and the movable rod mechanism are the rotation connection.
5. scissor dynamic formula oil pumper as claimed in claim 4, it is characterised in that the movable rod mechanism is also held including connecting rod
Power base, it is installed on the second table top, supports the middle part of the outer barrel.
6. scissor dynamic formula oil pumper as claimed in claim 1, it is characterised in that the scissor dynamic formula oil pumper also includes slowing down
Device, it is connected between the axis and the power set.
7. scissor dynamic formula oil pumper as claimed in claim 1, it is characterised in that the crank assembly also includes balance weight, institute
The revealed section for stating axis is fallen into the 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN105003231A CN105003231A (en) | 2015-10-28 |
| CN105003231B true 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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Families Citing this family (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 |
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| Publication number | Publication date |
|---|---|
| CN105003231A (en) | 2015-10-28 |
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