CN101865102B - Automatic hydraulic augmented injection pump - Google Patents
Automatic hydraulic augmented injection pump Download PDFInfo
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- CN101865102B CN101865102B CN 201010205750 CN201010205750A CN101865102B CN 101865102 B CN101865102 B CN 101865102B CN 201010205750 CN201010205750 CN 201010205750 CN 201010205750 A CN201010205750 A CN 201010205750A CN 101865102 B CN101865102 B CN 101865102B
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- 238000002347 injection Methods 0.000 title claims abstract description 48
- 239000007924 injection Substances 0.000 title claims abstract description 48
- 230000003190 augmentative effect Effects 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 230000008676 import Effects 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000005086 pumping Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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Abstract
The invention discloses an automatic hydraulic augmented injection pump; the valve chamber of a reversing valve comprises an upper chamber and a lower chamber; the upper chamber and the lower chamber are respectively provided with water inlets; an upper chamber reversing valve core capable of moving in the upper chamber is arranged in the upper chamber, and a lower chamber reversing valve core capable of moving in the lower chamber is arranged in the lower chamber; a power piston and a piston rod capable of driving the power piston to move are arranged in a power cylinder, the reversing valve is respectively communicated with the left cylinder body and the right cylinder body of the power cylinder through a first header and a second header, and the first header and the second header are respectively communicated with the water outlet of the reversing valve through the upper chamber; and a supercharging piston capable of moving in a supercharging cylinder is arranged in the supercharging cylinder. The automatic hydraulic augmented injection pump can complete twice of augmented injection in one stroke, drains liquid and augments injection while feeding liquid so as to improve the working efficiency, and a liquid feed water source can be reused for numerous times.
Description
Technical field
The present invention relates to the special-purpose water injection pump in a kind of oil field, particularly utilize pumping plant pipe network water to be used as power and make the automatic hydraulic augmented injection pump of water supercharging.
Background technique
At present, in world wide, oil-field flooding all adopts single pump pressure to the technique of many mouthfuls of well water fillings basically, and for this reason, ubiquity the under-injected well that needs supercharging and needed the low pressure water injection well of pressure regulation.Distinguish the novel injection pump that different well ' s conditions relies on water to be used as power, rather than realize that by reduction valve and electronic injection pump the individual well Partial pressure water injection is to solve water injection well in oil fields short and avoid pressure regulation, increases substantially the fundamental solution of injection pipe network efficient merely.
For many years, alleviated though install electronic injection pump between pumping plant and under-injected well additional the problem of shorting, owing to coming water pressure to waste fully, cost is too large.The patent No. is the automatic hydraulic augmented injection pump of " ZL03266367.6 ", taking full advantage of under the prerequisite that water is used as power, realizes the augmented injection to under-injected well, must have weary power fluid to return to the water tank of water supply pumping plant by return piping but be accompanied by.Because present oil field great majority do not have return piping, again lay return piping and not only take up an area, also will increase necessary investment, so the oil field user still is reluctant to use this waterpower injection pump.
For this reason, can realize that individual well Partial pressure water injection and simple in structure, energy-efficient, reliable performance, ground dual-pressure hydraulic filling booster pump easy to use just arise at the historic moment, be " ZL200520142169.7 " as the patent No., its day for announcing is on April 11st, 2007, name is called the Chinese utility model patent of " ground dual-pressure hydraulic filling booster pump ", it provides next high-pressure water flow with pumping plant, is processed into pressurized water streams and decompression current, to satisfy simultaneously the water filling needs of a bite under-injected well and a bite or many mouthfuls of surge shafts.But but there is following defective in this kind ground dual-pressure hydraulic filling booster pump: 1, because this kind ground dual-pressure hydraulic filling booster pump is unprocessed before augmented injection to the high pressure flowing water from pumping plant, the impurity in water can affect the working life of injection pump and pump efficiency is reduced; 2, this kind ground dual-pressure hydraulic filling booster pump also needs to be used in conjunction with the water distributor that is placed on the down-hole, and is placed on the water distributor replacing trouble of down-hole; 3, the selector valve of this kind ground dual-pressure hydraulic filling booster pump is common selector valve, and common selector valve is only suitable for the higher hydraulic oil of filter precision.4, the liquid feed valve of pressurized cylinder and liquid discharging valve are arranged in independent transfer line, in situation in the open, easily are damaged.5, this kind ground dual-pressure hydraulic filling booster pump to coming water pressure not finely tune, when pump efficiency reduction or water injection well increased pressure, must be changed another injection pump.
In order to solve the problems of the technologies described above, Chinese patent application number " 200910082041.9 ", its open day is on September 30th, 2009, name is called a kind of ground dual-pressure hydraulic filling booster pump, according to the specific requirement of oil-extracting and water-injecting well, the water flooding pump station water being carried out supercharging and reduced pressure treatment, export two kinds of different pressures, is that under-injected well and surge shaft are implemented water filling simultaneously.But but there is following defective in this kind ground dual-pressure hydraulic filling booster pump: 1, augmented injection pressure ratio is lower, can not satisfy to the individual well augmented injection fully.2, can only complete an augmented injection in a stroke, working efficiency is lower.3, can not carry out simultaneously the discharge opeing augmented injection during feed liquor, energy consumption is high and efficient is also low.4, complex structure causes service life of equipment shorter.5, the feed liquor water source can not recycle, and wastes energy and befouling environment.
Summary of the invention
The object of the invention is to overcome the problems referred to above that existing waterpower injection pump exists, a kind of automatic hydraulic augmented injection pump is provided, the present invention can complete twice augmented injection in a stroke, carry out the discharge opeing augmented injection in the time of feed liquor, thereby increase work efficiency, and the feed liquor water source can recycle heap of times.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of automatic hydraulic augmented injection pump comprises selector valve, ram and pressurized cylinder, it is characterized in that:
The valve pocket of described selector valve comprises epicoele and cavity of resorption, epicoele and cavity of resorption are respectively arranged with water intake, be provided with the epicoele changeover valve core that moves in epicoele in epicoele, be provided with the cavity of resorption changeover valve core that moves in cavity of resorption in cavity of resorption, the valve gap place of selector valve is provided with protecgulum passage and bonnet passage, and epicoele and cavity of resorption are respectively through protecgulum passage and bonnet channel connection;
Be provided with power piston in described ram and drive the piston rod that power piston moves, selector valve is communicated with left cylinder and the right cylinder body of ram respectively by the first header and the second header, and the first header and the second header are communicated with the selector valve water outlet through epicoele respectively;
Be provided with the charged piston that moves in described pressurized cylinder in pressurized cylinder, be provided with the first one-way valve and the 3rd one-way valve on the right cylinder body of pressurized cylinder, right cylinder body is communicated with the supercharging import by the first one-way valve, be communicated with the supercharging outlet by the 3rd one-way valve, be provided with the second one-way valve and the 4th one-way valve on the pressurized cylinder left cylinder, left cylinder is communicated with the supercharging import by the second one-way valve, is communicated with the supercharging outlet by the 4th one-way valve.
Described piston rod one end is connected with the linkage rod that drives the motion of cavity of resorption changeover valve core, and the interior charged piston of the other end and pressurized cylinder is connected.
Described epicoele changeover valve core is positioned at epicoele when left side, and the epicoele water intake is communicated with the second header by the cavity that forms between epicoele changeover valve core and epicoele right side, and the first header is communicated with the selector valve water outlet; When being positioned at the epicoele right side, the epicoele water intake is communicated with the first header by the cavity of formation between epicoele changeover valve core and epicoele left side, and the second header is communicated with the selector valve water outlet.
Be provided with the valve pocket central passage in described selector valve, valve pocket central passage one end is communicated with cavity of resorption, the other end respectively with protecgulum passage and bonnet channel connection.
Described selector valve water outlet, the first one-way valve and the second one-way valve are communicated with cesspool respectively.
Described the 3rd one-way valve and the 4th one-way valve are communicated with the outlet header respectively, and the outlet header is communicated with the supercharging outlet.
Described the first one-way valve and the second one-way valve are communicated with the import header respectively, and the import header is communicated with the supercharging import.
Described power piston is separated to form left cylinder and right cylinder body with ram, and the first header is communicated with left cylinder, and the second header is communicated with right cylinder body.
Described charged piston is separated to form left cylinder and right cylinder body with pressurized cylinder.
Described selector valve is connected in aggregates with ram by housing assembly, linkage rod is passed housing assembly and is connected with piston rod.
Employing the invention has the advantages that:
One, the present invention adopts two feed liquor one-way valves and two discharge opeing one-way valves, and namely during an one-way valve feed liquor, another one-way valve carries out the discharge opeing augmented injection simultaneously; Previous one-way valve carries out the discharge opeing augmented injection simultaneously when another one-way valve feed liquor, makes charged piston complete twice augmented injection in a stroke, efficient can be improved 2 times.
Two, the present invention designs two liquid feed valves of pressurized cylinder and two liquid discharging valves in pump case limited space dexterously, and the external form of pump becomes tubulose, and volume is little, lightweight, easy to use, management is simple, also can avoid injection pump to be damaged in situation in the open.
Three, ground hydraulic augmented injection pump long service life of the present invention, reliability is high, boundary dimension is little, more meet the oil-field flooding technological requirement, and has very strong applicability and energy-saving effect.
Four, the present invention is used as power by the pumping plant water, need not any power supply and gets final product automatic operation, and economic benefit is fairly obvious, and is particularly suitable for the well site use at unattended well station and non-communicated power supply remotely.
Five, commutation of the present invention is discharged water and is flow in cesspool by back of pipeline, as the feed liquor water source of this injection pump, thereby can recycle heap of times, not only energy saving but also free from environmental pollution.
Six, augmented injection pressure ratio of the present invention is very high, the water of pumping plant 0.1Mpa can be pressurized to 35Mpa to the individual well augmented injection, and Applicable scope is wide.
Seven, the internals such as piston, piston rod, cylinder body all adopt the stainless steel manufacturing, and moving surface carries out durionise to be processed, and hardness is high, resistance to wear, corrosion-resistant, long service life.
Description of drawings
Fig. 1 is structural representation of the present invention
Be labeled as in figure: 1, selector valve, 2, ram, 3, pressurized cylinder, 4, water intake, 5, epicoele changeover valve core, 6, the cavity of resorption changeover valve core, 7, power piston, 8, piston rod, 9, the first header, the 10, second header, 11, charged piston, 12, the first one-way valve, the 13, the 3rd one-way valve, 14, the supercharging import, 15, supercharging outlet, the 16, second one-way valve, the 17, the 4th one-way valve, 18, linkage rod, 19, the outlet header, 20, the import header.
Embodiment
A kind of automatic hydraulic augmented injection pump, comprise selector valve 1, ram 2 and pressurized cylinder 3, the valve pocket of selector valve 1 comprises epicoele and cavity of resorption, epicoele and cavity of resorption are respectively arranged with water intake 4, be provided with the epicoele changeover valve core 5 that moves in epicoele in epicoele, be provided with the cavity of resorption changeover valve core 6 that moves in cavity of resorption in cavity of resorption, the valve gap place of selector valve 1 is provided with protecgulum passage and bonnet passage, and epicoele and cavity of resorption are respectively through protecgulum passage and bonnet channel connection.
Be provided with power piston 7 and drive the piston rod 8 that power piston 7 moves in ram 2, selector valve 1 is communicated with left cylinder and the right cylinder body of ram 2 respectively by the first header 9 and the second header 10, and the first header 9 and the second header 10 are communicated with selector valve 1 water outlet through epicoele respectively.
Be provided with the charged piston 11 in pressurized cylinder 3 interior motions in pressurized cylinder 3, be provided with the first one-way valve 12 and the 3rd one-way valve 13 on the right cylinder body of pressurized cylinder 3, right cylinder body is communicated with supercharging import 14 by the first one-way valve 12, be communicated with supercharging outlet 15 by the 3rd one-way valve 13, be provided with the second one-way valve 16 and the 4th one-way valve 17 on pressurized cylinder 3 left cylinders, left cylinder is communicated with supercharging import 14 by the second one-way valve 16, is communicated with supercharging outlet 15 by the 4th one-way valve 17.
In the present invention, piston rod 8 one ends are connected with the linkage rod 18 that drives 6 motions of cavity of resorption changeover valve core, charged piston 11 in the other end and pressurized cylinder 3 is connected, the motion mode of cavity of resorption changeover valve core 6 and charged piston 11 has a lot, independent transmission device can be set drive, adopt this structure for best.
When epicoele changeover valve core 5 is positioned at epicoele when left side, the epicoele water intake is communicated with the second header 10 by the cavity that forms between epicoele changeover valve core 5 and epicoele right side, and the first header 9 is communicated with selector valve 1 water outlet; When being positioned at the epicoele right side, the epicoele water intake is communicated with the first header by the cavity of formation between epicoele changeover valve core 5 and epicoele left side, and the second header 10 is communicated with selector valve 1 water outlet.
Be provided with the valve pocket central passage in selector valve 1, valve pocket central passage one end is communicated with cavity of resorption, the other end respectively with protecgulum passage and bonnet channel connection.
In the present invention, selector valve water outlet, the first one-way valve 12 and the second one-way valve 16 are communicated with cesspool respectively.The 3rd one-way valve 13 and the 4th one-way valve 17 are communicated with outlet header 19 respectively, and outlet header 19 is communicated with supercharging outlet 15.The first one-way valve 12 and the second one-way valve 16 are communicated with import header 20 respectively, and import header 20 is communicated with the supercharging import.Power piston 7 is separated to form left cylinder and right cylinder body with ram 2, and the first header 9 is communicated with left cylinder, and the second header 10 is communicated with right cylinder body.Charged piston 11 is separated to form left cylinder and right cylinder body with pressurized cylinder 3.Selector valve 1 is connected in aggregates with ram 2 by housing assembly, linkage rod 18 is passed housing assembly and is connected with piston rod 8.
Working principle of the present invention is as follows:
as shown in the figure: the pumping plant water is after filtration after equipment, enter simultaneously change valve from 1 two water intakes of selector valve, one the tunnel enters the cavity of resorption of selector valve, this road water enters selector valve epicoele right side through valve pocket central passage and selector valve protecgulum passage, promoting epicoele changeover valve core 5 moves to left to leftmost position, make and form cavity between epicoele water intake and epicoele changeover valve core 5 and change valve and communicate, water inlet enters the right chamber of ram 2 by the second header 10, propulsion power piston 7 moves to left, on the one hand, the backwater in ram 2 left chambeies passes back into the selector valve water outlet through the first header 9, enter cesspool, on the other hand, linkage rod 18 also is moved to the left simultaneously, promotes the cavity of resorption changeover valve core 6 of selector valve cavity of resorption toward moving left, and the cavity of resorption water intake is communicated with selector valve lumen passage.Passage by left side selector valve bonnet enters the selector valve epicoele again, promote epicoele changeover valve core 5 commutation of turning right, move on the right of valve pocket, at this moment, the left side cavity of epicoele water intake between epicoele changeover valve core 5 and valve body, enter the left side of ram 2 by the first header 9, propulsion power piston 7 is turned right to commutate and is moved.the backwater in the right chamber of ram enters cesspool through the water outlet that the second header 10 is back to selector valve 1, when power piston 7 moves to right, drive linkage rod 18 toward moving right, cavity of resorption changeover valve core 6 also moves to right thereupon, backwater when selector valve 1 is in diverse location flows into cesspool from four backwater mouths respectively, at this moment, selector valve 1 cavity of resorption water inlet enters selector valve epicoele right side through valve pocket central passage and selector valve protecgulum passage, promotion epicoele changeover valve core 5 is turned left again to commutate and is moved to leftmost position, make the epicoele water intake communicate with epicoele changeover valve core 5 and the cavity that forms between valve body that commutates, epicoele water inlet enters ram 2 right chamber by the second header 10, 7 commutations of propulsion power piston move to left ...Complete so again and again: commutation------commutation again---the automatic reciprocating process of turning right again of turning left.
When power piston 7 when moving left, piston rod 8, charged piston 11 also move to left simultaneously, the first one-way valve 12 is subjected to inhale and opens, the 3rd one-way valve 13 by suction autoshutdown, the second one-way valve 16 pressurizeds close, the 4th one-way valve 17 pressurizeds open, the waste water in cesspool enters pressurized cylinder 3 right sides from supercharging import 14 through the first one-way valve 12; And the compressed high pressure waste water side in pressurized cylinder 3 left sides is injected mines through supercharging outlet 15 through the 4th one-way valve 17 again from outlet header 19.
When power piston 7 when moving right, piston rod 8, charged piston 11 also move to right simultaneously, the first one-way valve 12 pressurizeds are closed, the 3rd one-way valve 13 pressurizeds are opened, the second one-way valve 16 is subjected to inhale and opens, the 4th one-way valve 17 is by the suction autoshutdown, and the waste water in cesspool enters pressurized cylinder 3 left sides from supercharging import 14 through the second one-way valve 16; And the compressed high pressure waste water side on pressurized cylinder 3 right sides is injected mines through supercharging outlet 15 through the 3rd one-way valve 13 again from outlet header 19.
Claims (7)
1. an automatic hydraulic augmented injection pump, comprise selector valve (1), ram (2) and pressurized cylinder (3), it is characterized in that:
The valve pocket of described selector valve (1) comprises epicoele and cavity of resorption, epicoele and cavity of resorption are respectively arranged with water intake (4), be provided with the epicoele changeover valve core (5) that moves in epicoele in epicoele, be provided with the cavity of resorption changeover valve core (6) that moves in cavity of resorption in cavity of resorption, the valve gap place of selector valve (1) is provided with protecgulum passage and bonnet passage, and epicoele and cavity of resorption are respectively through protecgulum passage and bonnet channel connection;
Be provided with power piston (7) in described ram (2) and drive the piston rod (8) that power piston (7) moves, selector valve (1) is communicated with left cylinder and the right cylinder body of ram (2) respectively by the first header (9) and the second header (10), and the first header (9) and the second header (10) are communicated with the selector valve water outlet through epicoele respectively;
be provided with the charged piston (11) of motion in pressurized cylinder (3) in described pressurized cylinder (3), be provided with the first one-way valve (12) and the 3rd one-way valve (13) on the right cylinder body of pressurized cylinder (3), right cylinder body is communicated with supercharging import (14) by the first one-way valve (12), be communicated with supercharging outlet (15) by the 3rd one-way valve (13), be provided with the second one-way valve (16) and the 4th one-way valve (17) on pressurized cylinder (3) left cylinder, left cylinder is communicated with supercharging import (14) by the second one-way valve (16), be communicated with supercharging outlet (15) by the 4th one-way valve (17),
Described selector valve water outlet, the first one-way valve (12) and the second one-way valve (16) are communicated with cesspool respectively;
Described epicoele changeover valve core (5) is positioned at epicoele when left side, and the epicoele water intake is communicated with the second header (10) by the cavity that forms between epicoele changeover valve core (5) and epicoele right side, and the first header (9) is communicated with the selector valve water outlet; When being positioned at the epicoele right side, the epicoele water intake is communicated with the first header (9) by the cavity of formation between epicoele changeover valve core (5) and epicoele left side, and the second header (10) is communicated with the selector valve water outlet.
2. automatic hydraulic augmented injection pump according to claim 1 is characterized in that: described piston rod (8) one ends are connected with the linkage rod (18) that drives cavity of resorption changeover valve core (6) motion, and the interior charged piston (11) of the other end and pressurized cylinder (3) is connected.
3. automatic hydraulic augmented injection pump according to claim 1 and 2 is characterized in that: described the 3rd one-way valve (13) and the 4th one-way valve (17) are communicated with outlet header (19) respectively, and outlet header (19) exports (15) with supercharging and is communicated with.
4. automatic hydraulic augmented injection pump according to claim 3, it is characterized in that: described the first one-way valve (12) and the second one-way valve (16) are communicated with import header (20) respectively, and import header (20) is communicated with supercharging import (14).
5. according to claim 1,2 or 4 described automatic hydraulic augmented injection pumps, it is characterized in that: described power piston (7) is separated to form left cylinder and right cylinder body with ram (2), the first header (9) is communicated with left cylinder, and the second header (10) is communicated with right cylinder body.
6. automatic hydraulic augmented injection pump according to claim 5, it is characterized in that: described charged piston (11) is separated to form left cylinder and right cylinder body with pressurized cylinder (3).
7. automatic hydraulic augmented injection pump according to claim 2, it is characterized in that: described selector valve (1) is connected in aggregates with ram (2) by housing assembly, and linkage rod (18) is passed housing assembly and is connected with piston rod (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010205750 CN101865102B (en) | 2010-06-22 | 2010-06-22 | Automatic hydraulic augmented injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010205750 CN101865102B (en) | 2010-06-22 | 2010-06-22 | Automatic hydraulic augmented injection pump |
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| Publication Number | Publication Date |
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| CN101865102A CN101865102A (en) | 2010-10-20 |
| CN101865102B true CN101865102B (en) | 2013-05-08 |
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| CN 201010205750 Active CN101865102B (en) | 2010-06-22 | 2010-06-22 | Automatic hydraulic augmented injection pump |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105041739B (en) * | 2015-07-07 | 2017-01-18 | 四维增压科技(苏州)有限公司 | High-temperature pressure-increasing valve |
| CN109351193B (en) * | 2018-09-06 | 2024-11-12 | 厦门百霖净水科技有限公司 | A new type of pumpless RO device |
| CN113229974B (en) * | 2021-04-30 | 2022-09-30 | 深圳素士科技股份有限公司 | Pump case, pump subassembly and oral care device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527518B2 (en) * | 2000-09-21 | 2003-03-04 | Michael H. Ostrowski | Water-powered sump pump |
| CN1171015C (en) * | 2001-08-06 | 2004-10-13 | 彭国军 | Self-pressurizing high-pressure alchol-injection pump |
| CN1757915A (en) * | 2005-11-24 | 2006-04-12 | 李蓉 | Ground dual-pressure hydraulic filling booster pump |
| DE102005057752A1 (en) * | 2005-12-02 | 2007-06-06 | Bosch Rexroth Ag | ink metering |
-
2010
- 2010-06-22 CN CN 201010205750 patent/CN101865102B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6527518B2 (en) * | 2000-09-21 | 2003-03-04 | Michael H. Ostrowski | Water-powered sump pump |
| CN1171015C (en) * | 2001-08-06 | 2004-10-13 | 彭国军 | Self-pressurizing high-pressure alchol-injection pump |
| CN1757915A (en) * | 2005-11-24 | 2006-04-12 | 李蓉 | Ground dual-pressure hydraulic filling booster pump |
| DE102005057752A1 (en) * | 2005-12-02 | 2007-06-06 | Bosch Rexroth Ag | ink metering |
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| CN101865102A (en) | 2010-10-20 |
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Owner name: LESHAN CITY THERMODYNAMIC INSTRUMENT CO., LTD. Free format text: FORMER OWNER: PENG GUOJUN Effective date: 20140730 |
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Effective date of registration: 20140730 Address after: 614013 Sichuan city of Leshan Province town Suji back street shop village seven Patentee after: Leshan Thermo Technical Instruments Co., Ltd. Address before: The western part of central Sichuan city of Leshan province Elu Le 614000 No. 231 Patentee before: Peng Guojun |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: The western part of central Sichuan city of Leshan province Elu Le 614013 No. 231 Patentee after: Sichuan Zhongyou music instrument energy equipment manufacturing Limited by Share Ltd Address before: 614013 Sichuan city of Leshan Province town Suji back street shop village seven Patentee before: Leshan Thermo Technical Instruments Co., Ltd. |