CN101865102A - Automatic hydraulic augmented injection pump - Google Patents
Automatic hydraulic augmented injection pump Download PDFInfo
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- CN101865102A CN101865102A CN 201010205750 CN201010205750A CN101865102A CN 101865102 A CN101865102 A CN 101865102A CN 201010205750 CN201010205750 CN 201010205750 CN 201010205750 A CN201010205750 A CN 201010205750A CN 101865102 A CN101865102 A CN 101865102A
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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 the pumping plant pipe network to come water to be used as power to make the automatic hydraulic augmented injection pump of water supercharging.
Background technique
At present, the technology of single pump pressure to many mouthfuls of well water fillings is all adopted in oil-field flooding basically in the world wide, 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 water filling of individual well dividing potential drop is to solve water injection well in oil fields to short and avoid pressure regulation, increases substantially the basic outlet of injection pipe network efficient merely.
For many years, alleviated the problem of shorting though install electronic injection pump between pumping plant and the under-injected well additional, owing to come water pressure to waste fully, cost is too big.The patent No. is the automatic hydraulic augmented injection pump of " ZL03266367.6 ", under the prerequisite that makes full use of water to be used as power, realizes the augmented injection to under-injected well, but is accompanied by the water tank that must have weary power fluid to return the water supply pumping plant by return piping.Because the oil field great majority do not have return piping at present, lay return piping again and not only take up an area of, 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 water filling of individual well dividing potential drop and simple in structure, energy-efficient, reliable performance, ground dual-pressure hydraulic filling booster pump easy to use just arise at the historic moment, as the patent No. is " ZL200520142169.7 ", 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 the water filling needs of a bite under-injected well and a bite or many mouthfuls of surge shafts simultaneously.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, come the impurity in the water can influence 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 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 only is fit to the higher hydraulic oil of filter precision.4, the feed liquor valve of pressurized cylinder and liquid discharging valve are arranged in the independent transfer line, under the situation in the open, are damaged easily.5, this kind ground dual-pressure hydraulic filling booster pump can not be finely tuned coming water pressure, when pump efficiency reduction or water injection well increased pressure, must change 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, coming water to carry out supercharging and reduced pressure treatment water flooding pump station, 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 finish an augmented injection in a stroke, working efficiency is lower.3, can not carry out the discharge opeing augmented injection simultaneously during feed liquor, energy consumption height and efficient are 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 objective 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 finish 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 in epicoele, moves in the epicoele, be provided with the cavity of resorption changeover valve core that in cavity of resorption, moves in the 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 the described ram and drive the piston rod that power piston moves, selector valve is communicated with the left cylinder and the right cylinder body of ram respectively by first header and second header, and first header and second header are communicated with the selector valve water outlet through epicoele respectively;
Be provided with the charged piston that in pressurized cylinder, moves in the described pressurized cylinder, the right cylinder body of pressurized cylinder is provided with first one-way valve and the 3rd one-way valve, right cylinder body is communicated with the supercharging import by first one-way valve, be communicated with the supercharging outlet by the 3rd one-way valve, the pressurized cylinder left cylinder is provided with second one-way valve and the 4th one-way valve, left cylinder is communicated with the supercharging import by 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 second header by the cavity that forms between epicoele changeover valve core and the epicoele right side, and 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 first header by the cavity of formation between epicoele changeover valve core and the epicoele left side, and second header is communicated with the selector valve water outlet.
Be provided with the valve pocket central passage in the 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, first one-way valve and 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 first one-way valve and 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 first header is communicated with left cylinder, and 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 promptly during an one-way valve feed liquor, another one-way valve carries out the discharge opeing augmented injection simultaneously; Previous one-way valve then carries out the discharge opeing augmented injection simultaneously when another one-way valve feed liquor, makes charged piston finish twice augmented injection in a stroke, efficient can be improved 2 times.
Two, the present invention designs two feed liquor valves of pressurized cylinder and two liquid discharging valves in the limited space of pump case dexterously, and the external form of pump becomes tubulose, and volume is little, in light weight, easy to use, management is simple, also can avoid injection pump to be damaged under the situation in the open.
Three, ground hydraulic augmented injection pump long service life of the present invention, reliability height, boundary dimension little, more meet the oil-field flooding technological requirement, and have very strong applicability and energy-saving effect.
Four, the present invention comes water to be used as power by pumping plant, and need not any power source can work automatically, and economic benefit is fairly obvious, and is particularly suitable for the well site use of unattended remotely well station and non-communicated power supply.
Five, commutation discharge water of the present invention is back in the cesspool by 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 that comes of pumping plant 0.1Mpa can be pressurized to 35Mpa to the individual well augmented injection, and Applicable scope is wide.
Seven, internals such as piston, piston rod, cylinder body all adopt the stainless steel manufacturing, and moving surface carries out durionise to be handled, the hardness height, resistance to wear, corrosion-resistant, long service life.
Description of drawings
Fig. 1 is a structural representation of the present invention
Be labeled as among the 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, first header, 10, second header, 11, charged piston, 12, first one-way valve, the 13, the 3rd one-way valve, 14, the supercharging import, 15, supercharging outlet, 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 in epicoele, moves in the epicoele, be provided with the cavity of resorption changeover valve core 6 that moves in cavity of resorption in the 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.
In ram 2, be provided with power piston 7 and drive the piston rod 8 that power piston 7 moves, selector valve 1 is communicated with the left cylinder and the right cylinder body of ram 2 respectively by first header 9 and second header 10, and first header 9 and second header 10 are communicated with selector valve 1 water outlet through epicoele respectively.
In pressurized cylinder 3, be provided with the charged piston 11 of motion in pressurized cylinder 3, pressurized cylinder 3 right cylinder bodies are provided with first one-way valve 12 and the 3rd one-way valve 13, right cylinder body is communicated with supercharging import 14 by first one-way valve 12, be communicated with supercharging outlet 15 by the 3rd one-way valve 13, pressurized cylinder 3 left cylinders are provided with second one-way valve 16 and the 4th one-way valve 17, left cylinder is communicated with supercharging import 14 by second one-way valve 16, is communicated with supercharging outlet 15 by the 4th one-way valve 17.
Among 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 the 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 second header 10 by the cavity that forms between epicoele changeover valve core 5 and the epicoele right side, and 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 first header by the cavity of formation between epicoele changeover valve core 5 and the epicoele left side, and 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.
Among the present invention, selector valve water outlet, first one-way valve 12 and 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.First one-way valve 12 and 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 first header 9 is communicated with left cylinder, and 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: pumping plant comes water after filtration behind the equipment, enter change valve simultaneously from 1 two water intakes of selector valve, one the tunnel enters the cavity of resorption of selector valve, this Lu Laishui 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 that forming cavity between epicoele water intake and epicoele changeover valve core 5 and the change valve communicates, water inlet enters the right chamber of ram 2 by 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 first header 9, enters cesspool; On the other hand, linkage rod 18 also is moved to the left simultaneously, and the cavity of resorption changeover valve core 6 that promotes the selector valve cavity of resorption makes the cavity of resorption water intake communicate with selector valve lumen passage toward moving left.Passage by left side selector valve bonnet enters the selector valve epicoele again, promote epicoele changeover valve core 5 commutation of turning right, move to valve pocket the right, 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 first header 9, propulsion power piston 7 commutation of turning right is moved.The backwater in the right chamber of ram then enters cesspool through the water outlet that 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, the water inlet of selector valve 1 cavity of resorption 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 the epicoele changeover valve core 5 and the cavity that forms between the valve body that commutates, the epicoele water inlet enters ram 2 right chambeies by second header 10, and 7 commutations of propulsion power piston move to left ...Finish: commutation------commutation again---the automatic reciprocating process of turning right again of turning left so again and again.
When power piston 7 past moving left, piston rod 8, charged piston 11 also move to left simultaneously, first one-way valve 12 is subjected to inhale and opens, the 3rd one-way valve 13 by suction close automatically, second one-way valve, 16 pressurizeds are closed, the 4th one-way valve 17 pressurizeds are opened, the waste water in the cesspool enters pressurized cylinder 3 right sides from supercharging import 14 through first one-way valve 12; And the compressed high pressure waste water side in pressurized cylinder 3 left sides is injected mine through supercharging outlet 15 through the 4th one-way valve 17 again from outlet header 19.
When power piston 7 past moving right, piston rod 8, charged piston 11 also move to right simultaneously, first one-way valve, 12 pressurizeds are closed, the 3rd one-way valve 13 pressurizeds are opened, second one-way valve 16 is subjected to inhale and opens, the 4th one-way valve 17 is closed automatically by suction, and the waste water in the cesspool enters pressurized cylinder 3 left sides from supercharging import 14 through second one-way valve 16; And the compressed high pressure waste water side on pressurized cylinder 3 right sides is injected mine through supercharging outlet 15 through the 3rd one-way valve 13 again from outlet header 19.
Claims (9)
1. an automatic hydraulic augmented injection pump comprises 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 in epicoele, moves in the epicoele, be provided with the cavity of resorption changeover valve core (6) that in cavity of resorption, moves in the 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 the described ram (2) and drive the piston rod (8) that power piston (7) moves, selector valve (1) is communicated with the left cylinder and the right cylinder body of ram (2) respectively by first header (9) and second header (10), and first header (9) and 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 the described pressurized cylinder (3), the right cylinder body of pressurized cylinder (3) is provided with first one-way valve (12) and the 3rd one-way valve (13), right cylinder body is communicated with supercharging import (14) by first one-way valve (12), be communicated with supercharging outlet (15) by the 3rd one-way valve (13), pressurized cylinder (3) left cylinder is provided with second one-way valve (16) and the 4th one-way valve (17), left cylinder is communicated with supercharging import (14) by second one-way valve (16), is communicated with supercharging outlet (15) by the 4th one-way valve (17).
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, it is characterized in that: when described epicoele changeover valve core (5) is positioned at the epicoele left side, the epicoele water intake is communicated with second header (10) by the cavity that forms between epicoele changeover valve core (5) and the epicoele right side, and 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 first header (9) by the cavity of formation between epicoele changeover valve core (5) and the epicoele left side, and second header (10) is communicated with the selector valve water outlet.
4. automatic hydraulic augmented injection pump according to claim 4 is characterized in that: described selector valve water outlet, first one-way valve (12) and second one-way valve (16) are communicated with cesspool respectively.
5. according to claim 1,2 or 4 described automatic hydraulic augmented injection pumps, it 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) is communicated with supercharging outlet (15).
6. automatic hydraulic augmented injection pump according to claim 5 is characterized in that: described first one-way valve (12) and second one-way valve (16) are communicated with import header (20) respectively, and import header (20) is communicated with supercharging import (14).
7. according to claim 1,2,4 or 6 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), first header (9) is communicated with left cylinder, and second header (10) is communicated with right cylinder body.
8. automatic hydraulic augmented injection pump according to claim 7 is characterized in that: described charged piston (11) is separated to form left cylinder and right cylinder body with pressurized cylinder (3).
9. according to claim 1,2,4,6 or 8 described automatic hydraulic augmented injection pumps, 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101865102A true CN101865102A (en) | 2010-10-20 |
| CN101865102B CN101865102B (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010205750 Active CN101865102B (en) | 2010-06-22 | 2010-06-22 | Automatic hydraulic augmented injection pump |
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| CN (1) | CN101865102B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041739A (en) * | 2015-07-07 | 2015-11-11 | 四维增压科技(苏州)有限公司 | High-temperature pressure-increasing valve |
| CN109351193A (en) * | 2018-09-06 | 2019-02-19 | 厦门百霖净水科技有限公司 | It is a kind of novel without pump RO device |
| CN113229974A (en) * | 2021-04-30 | 2021-08-10 | 深圳素士科技股份有限公司 | Pump case, pump module and oral care device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041739A (en) * | 2015-07-07 | 2015-11-11 | 四维增压科技(苏州)有限公司 | High-temperature pressure-increasing valve |
| 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 |
| CN109351193A (en) * | 2018-09-06 | 2019-02-19 | 厦门百霖净水科技有限公司 | It is a kind of novel without pump RO device |
| CN113229974A (en) * | 2021-04-30 | 2021-08-10 | 深圳素士科技股份有限公司 | Pump case, pump module and oral care 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 |
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| CN101865102B (en) | 2013-05-08 |
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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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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. |
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