CN101936147B - Multifunctional double-acting hydraulic oil producing device - Google Patents
Multifunctional double-acting hydraulic oil producing device Download PDFInfo
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- CN101936147B CN101936147B CN200910012350.9A CN200910012350A CN101936147B CN 101936147 B CN101936147 B CN 101936147B CN 200910012350 A CN200910012350 A CN 200910012350A CN 101936147 B CN101936147 B CN 101936147B
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Abstract
Multifunctional double-acting hydraulic oil producing device, it is characterized in that two-way oil pumping barrel is placed in oil well setting of casing, long-plunger is provided with it, long-plunger is provided with hollow draw-bar, piston and hydraulic cylinder are provided with hollow draw-bar, two-way oil pumping barrel is located between hydraulic cylinder, travelling delivery valve is located on hollow draw-bar, end cover is provided with fixed inlet valve, hydraulic cylinder is connected by end cover with two-way oil pumping barrel, pump barrel is connected by end cover with hydraulic cylinder, end cover is provided with fixed inlet valve, long-plunger and piston are connected by hollow draw-bar, travelling delivery valve is located on hollow draw-bar, packer is connected with overflow valve, overflow valve is connected with plug socket, plug socket is connected with oil pipe, until being connected to well head.The present invention drives two-way pump plunger to be synchronized with the movement using hydraulic cylinder as driving force, be truly realized the two-way simultaneous in upper and lower stroke enter, oil extraction, with the eccentric wear exempted between sucker rod and oil pipe, energy-conservation and the characteristics of improve production efficiency.
Description
Technical field
The present invention relates to a kind of oil production equipment in oil field, more particularly to a kind of pump plunger can be double in upper and lower stroke
It is the intelligent hydraulic pumping unit structure to existing oil field to the Multifunctional double-acting hydraulic oil producing device completed into, oil extraction
Improve, the E21B43/00 technical fields belonged in International Patent Classification (IPC).
Background technology
At present, in oil exploitation both domestic and external, majority uses mechanical oil production technology equipment：Down eccentric barbell type walking beam is compound flat
Weigh oil pumper, pendulum thick stick formula oil pumper, the oil pumper of the various structure types such as prosperous space long stroke pumping unit and electric submersible pump.Adopting
For needing sand control containing the oil well more than sand when oily, it is normal to ensure to be heated (steam injection, electrical heating etc.) for heavy oil wells
Production, particularly because hole deviation causes the eccentric wear between sucker rod and oil pipe, considerably increases maintenance cost and production cost.It is big in addition
Part is all the DP technology unidirectionally pumped, and limits the raising of production efficiency.
Therefore, the present inventor once provides one kind in Publication No. CN1584284 patent of invention《Intelligent hydraulic is pumped
Machine》, this intelligent hydraulic pumping unit is made up of the hydraulic power unit matched with it, it is characterised in that provided with hollow in pump barrel
Sucker rod, at least provided with a hydraulic cylinder on hollow rod, in the middle provided with plunger, distinguishes at the position up and down of plunger
Provided with travelling check valve, check valve is provided with the bottom of hollow rod, fixed check valve, hydraulic cylinder are respectively equipped with pump barrel
It is connected by hydraulic system high-pressure pipeline with hydraulic power unit.
But there are still problems with for the intelligent hydraulic pumping unit of this structure：
1. because the double-action hydraulic oil extraction pump of use is to take out crude oil, the upper and lower chamber sand of double-action hydraulic oil extraction pump is made
It is more serious into the abrasion between plunger and pump barrel, holddown is often resulted in, the raising of operating efficiency is influenceed；
2. due to use double-action hydraulic oil extraction pump up-down stroke terminate commutate when, always stop for some time into
Oil extraction process, while be all starting under load again, this stationarity on hydraulic system has certain influence.
The content of the invention
It is an object of the present invention to solve the upper and lower chamber sand of existing double-action hydraulic oil extraction pump, cause plunger with
Abrasion between pump barrel is more serious, often results in holddown, influences the technical problem of operating efficiency；It is another object of the present invention to
Existing double-action hydraulic oil extraction pump is solved when up-down stroke is terminated and commutated, is always stopped for some time into oil extraction process, together
When again be all starting under load, so as to influence the stationarity of hydraulic system to obtain technical problem.
There is provided one kind by the further improvement of the patent of invention technology to Publication No. CN1584284 by the present inventor
New Multifunctional double-acting hydraulic oil producing device.This Multifunctional double-acting hydraulic oil producing device that the present invention is provided with it is corresponding
Hydraulic station matching composition, can provide one kind using hydraulic cylinder as driving force, drive two-way pump plunger to be synchronized with the movement, and can it is upper,
During down stroke two-way simultaneous enter, oil extraction, with it is simple in construction, easy to operate, eliminate eccentric wear between sucker rod and oil pipe, energy-conservation
The characteristics of with production efficiency is improved.
The technical scheme that the present invention is provided is：This Multifunctional double-acting hydraulic oil producing device, includes hydraulic station, pump
Cylinder, hollow rod, hydraulic cylinder and plunger, are characterized in
The two-way oil pumping barrel 18 is placed in the sleeve pipe 38 under oil well, and long-plunger 20 is provided with two-way oil pumping barrel 18,
Hollow draw-bar 15 and 25 is provided with long-plunger 20, piston 14 is provided with hollow draw-bar 15, provided with work on hollow draw-bar 25
Plug 26, piston 14 and 26 is respectively provided on hydraulic cylinder 13 and 27, and two-way oil pumping barrel 18 is located between hydraulic cylinder 13 and 27, is moved about
Delivery valve 19 and 21 is respectively provided on hollow draw-bar 15 and 25, and fixation is respectively equipped with the above and below of end cover 16 and 24
Inlet valve 17 and 23, hydraulic cylinder 13 and 27 is linked together by end cover 16 and 24 with two-way oil pumping barrel 18 respectively, pump
Cylinder 6 and 33 is linked together by end cover 12 and 29 with hydraulic cylinder 13 and 27 respectively, in the upper and lower of end cover 12 and 29
Side is respectively equipped with fixed inlet valve 11 and 30, and long-plunger 8 and piston 14 are linked together by hollow draw-bar 10, piston 26 and length
Plunger 32 is linked together by hollow draw-bar 28, and travelling delivery valve 9 and 31 is respectively provided at the upper and lower end of hollow draw-bar 10 and 28
Place, the top of pump barrel 6 is connected with packer 5, and the top of packer 5 is connected with overflow valve 4, top and the plug socket 3 of overflow valve 4
Connection, plug socket 3 is connected with oil pipe 2, until being connected to well head.
Gradually put with connection-peg and center oil pipe 1 from well head to underground, until connection-peg enters the setting mouth of plug socket
It is interior.The port of the annular space formed can be now set with by the port of center oil pipe 1 on well head and by center oil pipe 1 and oil pipe 2
It is connected respectively with two oil inlet and outlets of hydraulic station 35.
Be connected to hydraulic cylinder 13 and 27 enter, the petroleum pipeline 7 and 22 on oil return opening by packer 5, overflow valve 4 is respectively with inserting
The lower interface connection of joint chair 3, so that oil extraction pump operation is formed as the hydraulic system of a closing.
Purpose to better implement the present invention, realizes that double-action hydraulic oil extraction pump can be adopted in upper and lower stroke overall process
Oil purpose, the pump barrel 33 also with by screw pump 40, in line check valve 41, oil outlet one-way valve 42, hydraulic motor 43 and oil-feed
The screw pump device that check valve 44 is constituted is connected, and wherein the oil inlet and outlet of hydraulic motor 43 is connected with petroleum pipeline 7 and 22 respectively,
Hydraulic motor 43 is in the presence of power fluid, and main shaft output torque drives screw pump 40 to work, and now, crude oil just can be from screw rod
The in line check valve 41 of pump 40 enters, and the cavity of resorption of pump barrel 33 is flowed into from oil outlet one-way valve 39, so that the process into crude oil is completed, by defeated
The high voltage power liquid that oil pipe 7 and 22 enters hydraulic motor 43 is returned to from oil outlet one-way valve 42 by petroleum pipeline 22 and 7 respectively
Hydraulic station 35.
The operation principle of the present invention：
Two independent working chambers that the long-plunger 20 of double-action hydraulic oil recovery pump barrel is constituted in pump barrel 18, are drawn with hollow
Two hydraulic cylinders 13 and 27 on bar 15 and 25 are power, the upper and lower fortune of plunger 20 of synchronous drive double-action hydraulic oil recovery pump barrel
Dynamic, while also driving the upper and lower motion of long-plunger 8 and 32 in pump barrel 6 and 33, in upper and lower stroke, upper and lower chamber is respectively completed
Enter, oil extraction, so as to reach whole continuous recover the oil.Because the length of the present invention described plunger in the above-mentioned technical solutions is all higher than
The length of pump barrel, as long-plunger are matched with short pump barrel, and the length for changing plunger of the prior art is respectively less than the length of pump barrel
The structure of degree so that double-action hydraulic oil extraction pump upper and lower chamber in upper and lower stroke is difficult sand, fine sand can be with crude oil from travelling
Delivery valve is discharged into hollow draw-bar, not only alleviates the abrasion between plunger and pump barrel, also solves holddown and influence work effect
The problem of rate.
The NM in the above-mentioned technical solutions structure of the present invention is same as the prior art, particularly with it is of the prior art
Publication No. CN1584284 patent of invention technology contents are identical.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention devises power fluid automatic heating device in hydraulic system, and new work is provided for the exploitation of viscous crude
Skill；
2nd, the present invention drives oil well pump using double hydraulic cylinder, and plunger is in upper and lower stroke, while being pushed away by hollow draw-bar
Drawing is acted on, stress balance, and stable, driving force is big；
3rd, the present invention uses long-plunger, and short sealing pump barrel will not accumulate long-pending sand in seal clearance, can reduce abrasion and keep away
Exempt from holddown；
4th, the plunger of pump of the present invention is driven by underground liquid cylinder pressure is placed in upper and lower stroke, in the absence of between bar, pipe
Eccentric wear problem, so as to be inclined shaft, the oil recovery of horizontal well provides optimal DP technology；
5th, the present invention can easily be adjusted according to the depth of oil well oil and yield etc. the pressure of hydraulic system, jig frequency,
Stroke etc.；
6th, the characteristics of present invention is bigger, which also resides in, can implement one hydraulic station of collection while pumped for several mouthfuls of oil wells simultaneously, be this
The features such as oil recovery efficiency, energy-conservation and small floor space can be given full play to, this is also that other oil production methods are incomparable；
7th, the present invention is also devised with screw pump device, can continue to pump when the commutation of double-action hydraulic oil extraction pump stops taking out, can
Starting power when reducing commutation oil pumping, makes stress more balance, stably, elects power bigger.
8th, the present invention is due to using double hydraulic cylinder driving bidirectional ram pump to recover the oil, and its yield is high, is that existing oil field is used together
More than 1.6 times of oil well pump (unidirectional) yield in sample pump footpath, and can save energy 20 ~ 30%.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention provides embodiment；
Fig. 2 is the structural representation that the present invention provides screw pump device.
Marked in figure：1st, center oil pipe, 2, oil pipe, 3, plug socket, 4, overflow valve, 5, packer, 6, pump barrel, 7, oil transportation
Pipe, 8, long-plunger, 9, travelling delivery valve, 10, hollow draw-bar, 11, fixed inlet valve, 12, end cover, 13, hydraulic cylinder, 14,
Piston, 15, hollow draw-bar, 16, end cover, 17, fixed inlet valve, 18, two-way oil pumping barrel, 19, travelling delivery valve, 20,
Long-plunger, 21, travelling delivery valve, 22, petroleum pipeline, 23, fixed inlet valve, 24, end cover, 25, hollow draw-bar, 26, piston,
27th, hydraulic cylinder, 28, hollow draw-bar, 29, end cover, 30, fixed inlet valve, 31, travelling delivery valve, 32, long-plunger, 33, pump
Cylinder, 34, bottom valve, 35, hydraulic station, 36, heater, 37, check valve, 38, sleeve pipe, 39, oil outlet one-way valve, 40, screw pump,
41st, in line check valve, 42, oil outlet one-way valve, 43 hydraulic motors, 44, in line check valve.
Embodiment
The present invention is described in further details in conjunction with the drawings and specific embodiments.
As shown in figure 1, the sleeve pipe that the two-way oil well pump 18 of this Multifunctional double-acting hydraulic oil producing device is placed under oil well
In 38, long-plunger 20 is provided with two-way oil pumping barrel 18, hollow draw-bar 15 and 25 is provided with long-plunger 20, in hollow draw-bar 15
Piston 14 is provided with, piston 26 is provided with hollow draw-bar 25, piston 14 and 26 is respectively provided on hydraulic cylinder 13 and 27, two-way to take out
Oil pump cylinder 18 is located between hydraulic cylinder 13 and 27, and travelling delivery valve 19 and 21 is respectively provided on hollow draw-bar 15 and 25, in sealing
The above and below of end cap 16 and 24 is respectively equipped with fixed inlet valve 17 and 23, and hydraulic cylinder 13 and 27 passes through end cover 16 respectively
Linked together with 24 with two-way oil pumping barrel 18, pump barrel 6 and 33 passes through end cover 12 and 29 and hydraulic cylinder 13 and 27 respectively
Link together, fixed inlet valve 11 and 30, long-plunger 8 and piston 14 are respectively equipped with the upper and lower of end cover 12 and 29
Linked together by hollow draw-bar 10, piston 26 and long-plunger 32 are linked together by hollow draw-bar 28, move about delivery valve 9
At the upper and lower end that hollow draw-bar 10 and 28 is respectively provided at 31, the top of pump barrel 6 is connected with packer 5, the top of packer 5
It is connected with overflow valve 4, the top of overflow valve 4 is connected with plug socket 3, and plug socket 3 is connected with oil pipe 2, until being connected to well head.
Gradually put with connection-peg and center oil pipe 1 from well head to underground, until connection-peg enters the setting mouth of plug socket
It is interior.The port of the annular space formed can be now set with by the port of center oil pipe 1 on well head and by center oil pipe 1 and oil pipe 2
It is connected respectively with two oil inlet and outlets of hydraulic station 35.
Be connected to hydraulic cylinder 13 and 27 enter, the petroleum pipeline 7 and 22 on oil return opening by packer 5, overflow valve 4 is respectively with inserting
The lower interface connection of joint chair 3, so that oil extraction pump operation is formed as the hydraulic system of a closing.
As shown in Fig. 2 the pump barrel 33 also with by screw pump 40, in line check valve 41, oil outlet one-way valve 42, hydraulic motor
43 with line check valve 44 constitute screw pump devices be connected, wherein the oil inlet and outlet of hydraulic motor 43 respectively with petroleum pipeline 7
With 22 connections, hydraulic motor 43 is in the presence of power fluid, and main shaft output torque drives screw pump 40 to work, and now, crude oil is just
It can enter from the in line check valve 41 of screw pump 40, the cavity of resorption of pump barrel 33 be flowed into from oil outlet one-way valve 39, so as to complete into crude oil
Process, the high voltage power liquid for entering hydraulic motor 43 by petroleum pipeline 7 and 22 passes through petroleum pipeline from oil outlet one-way valve 42 respectively
22 and 7 return to hydraulic station 35.
The process that the present invention is operated：
During down stroke：The high voltage power liquid of hydraulic station 35 flows through annular space, the grafting that center oil pipe 1 and oil pipe 2 are constituted
Seat 3, overflow valve 4, the inner chamber of packer 5 and petroleum pipeline 7, then respectively enter the epicoele of hydraulic cylinder 13 and 27, long-plunger 8,20 and 32
Descending by the drive of hollow draw-bar 10,15,25 and 28, now, the delivery valve 9 and 21 that moves about is opened, and fixed inlet valve 17 and 30 is opened,
In line check valve 37 is opened, and fixed inlet valve 11 and 23 is closed, and the delivery valve 19 and 31 that moves about is closed, and bottom valve 34 is closed.At this moment pump
The crude oil of the cylinder crude oil of 6 time intracavitary, the crude oil of 18 times intracavitary of two-way oil pumping barrel and the cavity of resorption of pump barrel 33 passes through travelling oil-feed respectively
Valve 9 and 21 and in line check valve 37 enter hollow draw-bar 10,25 and 28, the epicoele by pump barrel 6, the inner chamber of packer 5 and overflow
Stream valve enters in the annular space that oil pipe 2 is constituted with sleeve pipe 38 until leading to well head discharge.At the same time two-way oil pumping barrel 18
Crude oil is entered by fixed inlet valve 17 and 30 respectively with the epicoele of pump barrel 33, the power fluid of the cavity of resorption of hydraulic cylinder 13 and 27 enters defeated
Oil pipe 22, enters in the fuel tank of the inner chamber backspace hydraulic station 35 of center oil pipe 1 by the inner chamber of packer 5, overflow valve 4, plug socket 3.
Until piston 14 and 26 moves to the cavity of resorption terminal of hydraulic cylinder 13 and 27.Oil recovery during down stroke is completed so as to oil extraction pump
Journey.
In upstroke, reversely, i.e., power fluid flows through center oil pipe 1, grafting to the high voltage power liquid of hydraulic station 35 from well head
The inner chamber of seat 3, overflow valve 4 and packer 5 enters petroleum pipeline 22.And respectively enter the cavity of resorption of hydraulic cylinder 13 and 27, long-plunger
8th, 20 and 32 up, the closing of inlet valve 9 and 21 of now moving about, the fixed and of inlet valve 17 are driven by hollow draw-bar 10,15,25 and 28
30 are closed, and in line check valve 37 is closed, and fixed inlet valve 11 and 23 is opened, and the delivery valve 19 and 31 that moves about is opened, and bottom valve 34 is opened.
At this moment the cavity of resorption of pump barrel 6 and 18 enters crude oil by fixed inlet valve 11 and 23, the epicoele of hydraulic cylinder 13 and 27 it is dynamic
Power liquid enters petroleum pipeline 7, flows through packer 5, overflow valve 4, plug socket 3 and enters the annular sky that oil pipe 2 and center oil pipe 1 are constituted
Between, until the piston 14 and 26 of hydraulic cylinder 13 and 27 moves to epicoele terminal, complete oil production machine upstroke oil pumping process.
When two-way oil pumping barrel 18 commutates, just it stopped into oil extraction process, the pressure of hydraulic system now rises rapidly
Height, hydraulic motor 43 has obtained higher operating pressure, and drives screw pump 40 to be pumped into crude oil, into the cavity of resorption of pump barrel 33, leads to
Check valve 37 is crossed, the annular space constituted via hollow draw-bar 28,25,15 and 10 inner chambers, packer and oil pipe 2 with sleeve pipe 38,
With the petroleum pipeline UNICOM on well head, this not only timely supplemented with two-way oil well pump 18 because commutation stops taking out, is changed while reducing
To starting power during oil pumping, stress is set more to balance, stable, election power is bigger, and adaptability is wider, is greatly improved production efficiency.
Claims (2)
1. a kind of Multifunctional double-acting hydraulic oil producing device, includes hydraulic station, pump barrel, hollow rod, hydraulic cylinder and plunger,
It is characterized in that
Two-way oil pumping barrel（18）The sleeve pipe being placed under oil well（38）In, two-way oil pumping barrel（18）Inside it is provided with the second long-plunger
（20）, in the second long-plunger（20）It is provided with the second hollow draw-bar（15）With the 3rd hollow draw-bar（25）, in the second hollow draw-bar
（15）It is provided with first piston（14）, in the 3rd hollow draw-bar（25）It is provided with second piston（26）, first piston（14）With
Two pistons（26）It is respectively provided at first hydraulic cylinder（13）And second hydraulic cylinder（27）On, two-way oil pumping barrel (18) is located at the first liquid
Cylinder pressure (13) and second hydraulic cylinder（27) between, the second travelling delivery valve (19) and the 3rd travelling delivery valve（21) it is respectively provided at
Two hollow draw-bars (15) and the 3rd hollow draw-bar（25) on, in the second end cover (16) and the 3rd end cover（24) lower section
The second fixation inlet valve (17) and the 3rd, which is respectively equipped with, with top fixes inlet valve（23), first hydraulic cylinder (13) and the second hydraulic pressure
Cylinder（27) the second end cover (16) and the 3rd end cover are passed through respectively（24) with two-way oil pumping barrel（18）Link together,
First pump barrel (6) and the second pump barrel（33) the first end cover (12) and the 4th end cover are passed through respectively（29) with the first hydraulic pressure
Cylinder (13) and second hydraulic cylinder（27) link together, in the first end cover (12) and the 4th end cover（29) upper and lower
Side is respectively equipped with the first fixation inlet valve (11) and the 4th and fixes inlet valve (30), the first long-plunger (8) and first piston (14)
Linked together by the first hollow draw-bar (10), second piston (26) and the 3rd long-plunger (32) pass through the 4th hollow draw-bar
(28) link together, and length of the length more than the first pump barrel (6) of the first long-plunger (8), the length of the 3rd long-plunger (32)
Degree is more than the second pump barrel（33) length；It is empty that first travelling delivery valve (9) and the 4th travelling delivery valve (31) are respectively provided at first
At the upper and lower end of heart pull bar (10) and the 4th hollow draw-bar (28), the top of the first pump barrel (6) is connected with packer (5), packing
The top of device (5) is connected with overflow valve (4), and the top of overflow valve (4) is connected with plug socket (3), plug socket (3) and oil pipe (2)
Connection, until being connected to well head；
Gradually put with connection-peg and center oil pipe (1) from well head to underground, until connection-peg enter plug socket it is setting intraoral,
On well head the port of center oil pipe (1) and by center oil pipe (1) and oil pipe (2) be set with the port of the annular space formed respectively with
The oil inlet and outlet connection of hydraulic station (35)；
Be connected to first hydraulic cylinder (13) and second hydraulic cylinder (27) enter, the first petroleum pipeline (7) on oil return opening and the second oil transportation
(22) are managed by packer (5), lower interface of the overflow valve (4) respectively with plug socket (3) is connected.
2. according to Multifunctional double-acting hydraulic oil producing device described in claim 1, it is characterised in that second pump barrel (33) is also
With by screw pump (40), the first in line check valve (41), oil outlet one-way valve (42), hydraulic motor (43) and the second in line check valve
(44) screw pump device of composition is connected, wherein the oil inlet and outlet of hydraulic motor (43) respectively with the first petroleum pipeline (7) and the
Two petroleum pipelines (22) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012350.9A CN101936147B (en) | 2009-07-03 | 2009-07-03 | Multifunctional double-acting hydraulic oil producing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012350.9A CN101936147B (en) | 2009-07-03 | 2009-07-03 | Multifunctional double-acting hydraulic oil producing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101936147A CN101936147A (en) | 2011-01-05 |
| CN101936147B true CN101936147B (en) | 2017-08-11 |
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ID=43389695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910012350.9A Active CN101936147B (en) | 2009-07-03 | 2009-07-03 | Multifunctional double-acting hydraulic oil producing device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410478B (en) * | 2013-08-07 | 2015-12-09 | 中国石油化工股份有限公司 | The hollow oil rig of a kind of producing profile testing |
| CN105888617A (en) * | 2014-12-26 | 2016-08-24 | 卞康群 | Hydraulic linked double-acting rodless oil production device |
| CN105625995B (en) * | 2016-01-29 | 2018-07-03 | 徐晓波 | Without bar mining system |
| CN106014910B (en) * | 2016-05-20 | 2018-04-20 | 东北石油大学 | Combined type double acting rod-type pumping unit and its oil production method |
| CN113431813B (en) * | 2021-07-25 | 2024-04-12 | 广州嵩晨机电科技有限公司 | Hydraulic system assembly mechanism for field oil extraction and reciprocating oil pumping control |
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| US6321854B1 (en) * | 1997-08-22 | 2001-11-27 | Giovanni Bisutti | Power tool |
| CN1370927A (en) * | 2001-02-23 | 2002-09-25 | 石油大学(北京) | Hydraulic feedback sand-preventing pump for flexible continuous pumping rod |
| CN1584284A (en) * | 2004-06-08 | 2005-02-23 | 沈阳丹迪科技有限公司 | Intelligent hydraulic oil pumping equipments |
| CN101220807A (en) * | 2007-01-08 | 2008-07-16 | 凌建军 | Lever oil pump capable of eliminating eccentric wear and directly flushing well |
| CN201460823U (en) * | 2009-07-03 | 2010-05-12 | 刘学柱 | Multifunctional double-acting hydraulic oil production device |
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2009
- 2009-07-03 CN CN200910012350.9A patent/CN101936147B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321854B1 (en) * | 1997-08-22 | 2001-11-27 | Giovanni Bisutti | Power tool |
| CN1370927A (en) * | 2001-02-23 | 2002-09-25 | 石油大学(北京) | Hydraulic feedback sand-preventing pump for flexible continuous pumping rod |
| CN1584284A (en) * | 2004-06-08 | 2005-02-23 | 沈阳丹迪科技有限公司 | Intelligent hydraulic oil pumping equipments |
| CN101220807A (en) * | 2007-01-08 | 2008-07-16 | 凌建军 | Lever oil pump capable of eliminating eccentric wear and directly flushing well |
| CN201460823U (en) * | 2009-07-03 | 2010-05-12 | 刘学柱 | Multifunctional double-acting hydraulic oil production device |
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| Publication number | Publication date |
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| CN101936147A (en) | 2011-01-05 |
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Inventor after: Liu Xuezhu Inventor before: Liu Xuezhu Inventor before: Huang Wentao |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170601 Address after: 343, room 7-5, 110042 Beihai street, Dadong District, Liaoning, Shenyang Applicant after: Liu Xuezhu Address before: 343, room 7-5, 110042 Beihai street, Dadong District, Liaoning, Shenyang Applicant before: Liu Xuezhu Applicant before: Huang Wentao |
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