CN2483506Y - Autoamtic pressure-regulating and water injection machine used in oil-field - Google Patents
Autoamtic pressure-regulating and water injection machine used in oil-field Download PDFInfo
- Publication number
- CN2483506Y CN2483506Y CN 01237904 CN01237904U CN2483506Y CN 2483506 Y CN2483506 Y CN 2483506Y CN 01237904 CN01237904 CN 01237904 CN 01237904 U CN01237904 U CN 01237904U CN 2483506 Y CN2483506 Y CN 2483506Y
- Authority
- CN
- China
- Prior art keywords
- water
- oil
- chamber
- valve
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides an automatic voltage regulating water injection machine for oilfields, comprising a voltage regulating cylinder, an oil adding device, an approach switch, an electromagnetic directional valve, a water oil energy converter, an input and output one-way valve, bridge type insert valve parts and an energy accumulator. The oil adding device is arranged in the inner core of the piston and the connecting rod in the voltage regulating. The input and output one-way valve is respectively connected to an inlet pipe, an A cavity and a D cavity of the voltage regulating cylinder and an outlet pipe for the high pressure water injection. The bridge type insert valve parts are respectively connected to an inlet pipe, an outlet pipe for the low pressure water injection, a B cavity of the voltage regulating cylinder, an inlet and an outlet of the water oil energy converter and a C cavity of the voltage regulating cylinder. An oil pipe of the water oil energy converter is respectively connected to an oil groove and the electromagnetic directional valve. The approach switch is fixed on a slider which moves along with the moving of the piston of the voltage regulating cylinder. The control circuit connected with the electromagnetic directional valve switches on and switches off through induction signal from the approach switch.
Description
The utility model relates to liquid capacity-changing mechanical, is meant a kind of self pressure that utilizes water inlet especially, adopts voltage regulation cylinder two water filling delivery ports of high-low pressure to be set and grease injector is set in voltage regulation cylinder; Voltage regulation cylinder adopts the oil field automatic Regulation water filling machine that the automatic Regulation water filling is carried out in the oil field near the hydraulic control system of formations such as switch, solenoid operated directional valve, water oil energy converter, input and output one way valve, bridge-type plug-in type valve member and accumulator.
Boosting water injector (the patent No.: ZL98201063X) of present Oilfield using, has only a high pressure water injection delivery port, another delivery port is then discharged with return water mode, because backwater has pollution can not directly enter ground, can only lay special-purpose return piping discharging, backwater also will be handled in addition, and the cost that has so just increased the backwater discharging greatly and handled has influenced the use in the oil field; And its pressurized cylinder piston sealing ring does not have grease lubrication, and the sealing ring of working under aqueous medium is very short application life, needs frequent repair and replacement, not only increases maintenance cost, but also influences fuel-displaced production; Hydraulicdirectional control valve and pilot reversing valve two valves control commutation water filling are adopted in the pressurized cylinder hydraulic control of boosting water injector, usually occur when carrying out the commutation task jointly owing to two valves shutting down, and make the commutation reliability extremely low; And with aqueous medium during,, cause that movable part is perishable in the valve, the life-span short because of chemical element such as impurity is arranged in the water as guide's liquid controlled reversing, and pilot reversing valve does not still have the standard approved product simultaneously, and cost of production will greatly increase voluntarily; This boosting water injector through trial-production can't use at the scene, oil field at all.
The purpose of this utility model just is to overcome the defective of existing boosting water injector, and a kind of self pressure that utilizes water inlet is provided, and adopts voltage regulation cylinder two water filling delivery ports of high-low pressure to be set and grease injector is set in voltage regulation cylinder; The hydraulic control system of voltage regulation cylinder adopts the automatic water filling machine in oil field that constitutes near switch, solenoid operated directional valve, water oil energy converter, input and output one way valve, bridge-type plug-in type valve member and accumulator.
Automatic Regulation water filling machine in oil field of the present utility model is by voltage regulation cylinder and grease injector, constitute near switch, solenoid operated directional valve, water oil energy converter, input and output one way valve, bridge-type plug-in type valve member and accumulator, voltage regulation cylinder inner carrier and slider are divided into A, B, four chambeies of C, D with cylinder body, and grease injector is positioned at the inner core of piston and connecting rod; The imports of two input one way valves are connected with the pipeline of water inlet respectively, and simultaneously inlet channel is in parallel inserts the import of bridge-type plug-in type valve member, and the outlet of two input one way valves and two imports of exporting one way valves are connected the import and export in the A chamber and the D chamber of voltage regulation cylinder respectively; The outlet of two output one way valves is connected respectively on the high pressure water injection outlet conduit; Bridge-type plug-in type valve member outlet is connected on the low pressure water injection outlet conduit, on the low pressure water injection outlet conduit by the accumulator that pressure stabilization function has been housed; Bridge-type plug-in type valve member one is imported and exported B chamber and the import of water oil energy converter that (I) feeds voltage regulation cylinder respectively, another import and export (II) and the water oil energy converter outlet C chamber of inserting voltage regulation cylinder in parallel, the oil pipe of water oil energy converter is connected with solenoid operated directional valve with oil groove respectively; Be fixed in the voltage regulation cylinder on the slide block that moves with piston and move near switch, through sending induced signal near switch, control loop switched on and off, control loop is connected with solenoid operated directional valve; A chamber, C chamber and the D chamber of solenoid operated directional valve control voltage regulation cylinder, the water inlet in B chamber and water filling action.When carrying out work, have certain pressure come water to enter the input one way valve that leads to voltage regulation cylinder A chamber through inlet channel after enter the A chamber, water enters the C chamber of voltage regulation cylinder again through water oil energy converter after inlet channel enters the import of bridge-type plug-in type valve member simultaneously, and the hydraulic oil of water oil energy converter is admitted to solenoid operated directional valve control commutation.Owing to come glassware for drinking water that certain pressure is arranged, voltage regulation cylinder A chamber piston area adds the piston area of C chamber annular piston area greater than the D chamber, therefore the voltage regulation cylinder piston moves to the D chamber, make water in the D chamber be forced out and produce the 1-1.5 hydraulic pressure doubly of water pressure, current are sent into the high pressure water injection outlet conduit through the output one way valve that leads to voltage regulation cylinder D chamber, the B chamber also extrudes the current of water pressure 0-0.5 times hydraulic pressure to enter bridge-type plug-in type valve member through import and export (I) and enters the low pressure water injection outlet conduit by the outlet of bridge-type plug-in type valve member more simultaneously, and the accumulator of installation can balance outlet conduit internal pressure performance pressure stabilization function.When the voltage regulation cylinder piston walks to dead-centre position, be fixed in the voltage regulation cylinder and send induced signal near switch on the slide block that moves with piston and move, control loop control solenoid operated directional valve change action, water oil energy converter action simultaneously, hydraulic oil is sent into solenoid operated directional valve control commutation action, the solenoid operated directional valve commutation, voltage regulation cylinder D chamber, B chamber begin water inlet, and A chamber, C chamber are respectively by high pressure water injection outlet conduit and the water filling of low pressure water injection outlet conduit.Moving in circles and constantly finish into water and water filling action in the A chamber of voltage regulation cylinder, C chamber and D chamber, B chamber, has just reached the purpose to the continuously automatic water filling of oil field stratum.Grease injector of the present utility model is positioned at the inner core of voltage regulation cylinder piston and connecting rod, the skewed slot of circumferentially being offered by the water cavity at connecting rod inner core middle part and two grease chambeies before and after it and voltage regulation cylinder piston constitutes, valve piston is set and is full of grease in the two grease chambeies, when the voltage regulation cylinder piston motion, the duct that with water cavity communicate of the press water in voltage regulation cylinder C chamber through being provided with enters water cavity, valve piston in the grease chamber, front and back promotes grease and moves to the skewed slot direction of voltage regulation cylinder piston under the effect of water cavity pressure, grease injects the voltage regulation cylinder piston packing through skewed slot and plays lubrication.Water oil energy converter is by water entrance, conversion cylinder, piston, plunger, the suction one way valve, the fluid accumulator, strainer and G chamber and H chamber constitute, piston is positioned at conversion cylinder, be respectively plunger before and after it, and be set to G chamber and H chamber before and after the conversion cylinder respectively, water entrance before and after the front and back position of conversion cylinder piston motion is provided with, the G chamber has import and export respectively with the H chamber and is connected with the suction one way valve, two suck one way valve connects oil groove, two discharge one way valves connect the fluid accumulator and strainer leads to solenoid operated directional valve, during the work of water oil energy converter, because solenoid operated directional valve commutation, hydrodynamic force liquid enters conversion cylinder by front or rear water entrance respectively, promote piston and drive two end plug move left and right simultaneously, the hydraulic oil that sucks G chamber or H chamber is pressed into strainer, enter solenoid operated directional valve through the commutation pipeline, the fluid accumulator that is provided with on the commutation pipeline can equalizing main internal pressure performance pressure stabilization function.Solenoid operated directional valve can be selected the electromagnetic valve of general " meta function " symbol of hydraulic system for " M " for use, for example: DSG-01-3C9-D12-(N
1)-50; 4WE6M-50960/0G24 models such as (N).Bridge-type plug-in type valve member adopts the plug-in type ball-valve structure, has guaranteed the tight closure of ball and valve seat taper hole.Voltage regulation cylinder of the present utility model can adopt single cylinder, also can adopt the use in parallel of twin-tub or three cylinders.
Advantage of the present utility model just is to have avoided the backwater discharging modes because voltage regulation cylinder is provided with two water filling delivery ports of high-low pressure, has not only exempted the pollution on ground but also has saved the high cost that special-purpose backwater discharge pipe line is set; Grease injector is set in voltage regulation cylinder, has prolonged the application life of voltage regulation cylinder sealing ring greatly, reduced maintenance cost, guaranteed the continuity of field produces; With solenoid operated directional valve control commutation, overcome with hydraulicdirectional control valve and the extremely low defective of pilot reversing valve two valves control commutation water filling reliability and stability, and electromagnetic valve is the standard approved product, replace two valves to overcome with a valve and cause the corrosion-prone defective of movable part in the reversal valve, also reduced cost of production simultaneously as impurity in guide's liquid controlled reversing water with aqueous medium.Therefore automatic Regulation water filling facility in oil field of the present utility model have marketing prospect widely.
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is that the utility model oil field automatic Regulation water filling machine profile master looks schematic diagram;
Fig. 2 is the utility model oil field automatic Regulation water filling machine profile schematic side view;
Fig. 3 is the utility model oil field automatic Regulation water filling machine workflow schematic diagram;
Fig. 4 be in the utility model voltage regulation cylinder the grease injector structure and near switch commutation work schematic diagram;
Fig. 5 is a water oil energy converter structural representation of the present utility model;
Fig. 6 is a water oil energy converter sewage draining exit structural representation of the present utility model;
Fig. 7 is the schematic diagram of former boosting water injector plug-in type valve member cone valve structure;
Fig. 8 is the schematic diagram of the utility model plug-in type valve member ball-valve structure.
See figures.1.and.2, the automatic water filling machine in the utility model oil field is made of base 1, accumulator 2, water oil energy converter 3, voltage regulation cylinder 4, solenoid operated directional valve 5, bridge-type plug-in type reversal valve 6, input and output one way valve 7, strainer 8 etc., be fixed in the voltage regulation cylinder 4 on the slide block that moves with piston and move near switch, its induction control loop is connected with solenoid operated directional valve 5, and grease injector is positioned at the inner core of voltage regulation cylinder 4 inner carriers and connecting rod.
With reference to Fig. 3, as figure voltage regulation cylinder 4 inner carriers and slider cylinder body is divided into A, B, four chambeies of C, D, the import of two input one way valve 7-2,7-4 is connected with inlet channel and strainer 8,6 imports of the bridge-type of inlet channel access in parallel simultaneously plug-in type valve member, the outlet of input one way valve 7-2,7-4 connects the A chamber and the D chamber of voltage regulation cylinder 4 respectively.The import of two output one way valve 7-1,7-3 connects the A chamber of voltage regulation cylinder 4 and D chamber respectively, their outlet is connected on the high pressure water injection outlet conduit.6 outlets of bridge-type plug-in type valve member are connected on the low pressure water injection outlet conduit, and accumulator 2 is housed on the low pressure water injection outlet conduit.Bridge-type plug-in type valve member 6 one is imported and exported B chamber and 3 imports of water oil energy converter that (I) feeds voltage regulation cylinder 4 respectively, another import and export (II) and the water oil energy converter 3 outlets C chamber of inserting voltage regulation cylinder 4 in parallel, the oil pipe of water oil energy converter 3 is connected with solenoid operated directional valve 5 with oil groove respectively.Be fixed in the voltage regulation cylinder 4 on the slide block that moves with piston and move near switch, be connected with solenoid operated directional valve 5 by the induction control loop, solenoid operated directional valve 5 is controlled A chamber, C chamber and the D chamber of voltage regulation cylinders 4, the water inlet and the water filling in B chamber moved.
With reference to Fig. 4, be positioned at piston and connecting rod inner core as the figure grease injector, form by water cavity E, grease chamber F, valve piston 4-3, water inlet duct 4-6, voltage regulation cylinder piston 4-8, skewed slot 4-1, sealing ring 4-2, in two grease chamber F, be full of grease, when voltage regulation cylinder piston 4-8 moves, the press water in voltage regulation cylinder C chamber enters water cavity E through water inlet duct 4-4, two grease chamber F valve piston 4-3 promote grease and move to the skewed slot 4-1 of voltage regulation cylinder piston 4-8 direction under water cavity E pressure water action, grease injects sealing ring 4-2 through skewed slot 4-1 and plays lubrication.
As figure, undertaken by push rod 4-5 and slide block 4-6 near switch 4-7 commutation, be fixed on the slide block 4-6 near switch 4-7, when voltage regulation cylinder piston 4-8 walks to dead-centre position, bump push rod 4-5, push rod 4-5 makes slide block 4-6 move drive and enters induction zone or leave induction zone with moving of voltage regulation cylinder piston 4-8 near switch 4-7, and the induction control loop is switched on or switched off, 5 commutations of control solenoid operated directional valve.
With reference to Fig. 5 and Fig. 6, water oil energy converter is by water entrance 3-3,3-4, conversion cylinder 3-10, piston 3-11, plunger 3-9,3-12, suction one way valve 3-1,3-2,3-5,3-6, fluid accumulator 3-7, strainer 3-8 and G chamber and H chamber constitute, during the work of water oil energy converter, because solenoid operated directional valve 5 commutations, hydrodynamic force liquid enters conversion cylinder 3-10 by water entrance 3-3 or water entrance 3-4 respectively, promote piston 3-11 and drive two end plug 3-9 simultaneously, the 3-12 move left and right, by suction one way valve 3-1,3-2,3-5, the hydraulic oil that 3-6 will suck G chamber or H chamber is pressed into strainer 3-10 and the commutation pipeline enters solenoid operated directional valve 5, and fluid accumulator 3-7 can balance commutation loine pressure performance pressure stabilization function.As Fig. 6, the water of leakage and oily power fluid are discharged by sewage draining exit 3-14,3-15 through dirt discharge groove 3-11,3-16.
With reference to Fig. 7 and Fig. 8, as Fig. 7 straight line L is the hole of the cone valve structure valve seat that uses of former boosting water injector (ZL98201063X) and the contact wire of cone valve,, poor lubrication low in viscosity add distinctive corrosion of aqueous medium and cavitation erosion influence down, and the sealing contact wire is can be very fast destroyed and influence is used.And, adopt ball-valve structure sealing contact wire L not rest on all the time on the permanent position, thereby solved the difficult problem that to use because of corrosion as Fig. 8.
Below be an embodiment of the present utility model, the actual use of the present utility model is not limited to embodiment.
Adopt the automatic water filling machine in oil field of the two voltage regulation cylinder structures of the utility model, coming water pressure is 16Mpa, and oil field automatic Regulation water filling machine is to the stratum water filling, and the high pressure water injection outlet pressure is 20MPa, and the low pressure water injection outlet pressure is 5 MPa, and water filling is 4 months continuously.Water filling work meets the oil-field flooding requirement, has saved energy greatly, has reduced the water filling cost, water flood operations is easy, be easy to promote the use of.
Claims (9)
1, a kind of oil field automatic Regulation water filling machine, it is characterized in that by voltage regulation cylinder and grease injector, constitute near switch, solenoid operated directional valve, water oil energy converter, input and output one way valve, bridge-type plug-in type valve member and accumulator, voltage regulation cylinder inner carrier and slider are divided into A, B, four chambeies of C, D with cylinder body, and grease injector is positioned at the inner core of piston and connecting rod; The imports of two input one way valves are connected with the pipeline of water inlet respectively, and simultaneously inlet channel is in parallel inserts the import of bridge-type plug-in type valve member, and the outlet of two input one way valves and two imports of exporting one way valves are connected the import and export in the A chamber and the D chamber of voltage regulation cylinder respectively; The outlet of two output one way valves is connected respectively on the high pressure water injection outlet conduit; The outlet of bridge-type plug-in type valve member is connected on the low pressure water injection outlet conduit, and the accumulator of pressure stabilization function has been installed on the low pressure water injection outlet conduit; Bridge-type plug-in type valve member one is imported and exported B chamber and the import of water oil energy converter that (I) feeds voltage regulation cylinder respectively, another import and export (II) and the water oil energy converter outlet C chamber of inserting voltage regulation cylinder in parallel, the oil pipe of water oil energy converter is connected with solenoid operated directional valve with oil groove respectively; Be fixed in the voltage regulation cylinder on the slide block that moves with piston and move near switch, through sending induced signal near switch, control loop switched on and off, control loop is connected with solenoid operated directional valve.
2, automatic Regulation water filling machine in oil field according to claim 1, it is characterized in that grease injector is positioned at the inner core of voltage regulation cylinder piston and connecting rod, the skewed slot of circumferentially being offered by the water cavity at connecting rod inner core middle part and two grease chambeies before and after it and voltage regulation cylinder piston constitutes, and valve piston is set and is full of grease in the two grease chambeies.
3, automatic Regulation water filling machine in oil field according to claim 1, it is characterized in that water oil energy converter is by water entrance, conversion cylinder, piston, plunger, the suction one way valve, the fluid accumulator, strainer and G chamber and H chamber constitute, piston is positioned at conversion cylinder, be respectively plunger before and after it, and be set to G chamber and H chamber before and after the conversion cylinder respectively, water entrance before and after the front and back position of conversion cylinder piston motion is provided with, the G chamber has import and export respectively with the H chamber and is connected with the suction one way valve, two suck one way valve connects oil groove, and two discharge one way valves connect the fluid accumulator and strainer leads to solenoid operated directional valve.
4, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that the voltage regulation cylinder of oil field automatic Regulation water filling machine adopts single cylinder.
5, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that the voltage regulation cylinder of oil field automatic Regulation water filling machine adopts twin-tub use in parallel.
6, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that the voltage regulation cylinder of oil field automatic Regulation water filling machine adopts the use in parallel of three cylinders.
7, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that it is DSG-01-3C9-D12-(N that solenoid operated directional valve is selected model for use
1The electromagnetic valve of)-50.
8, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that it is the electromagnetic valve of 4WE6M-50960/0G24 (N) that solenoid operated directional valve is selected model for use.
9, automatic Regulation water filling machine in oil field according to claim 1 is characterized in that bridge-type plug-in type valve member adopts the plug-in type ball-valve structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01237904 CN2483506Y (en) | 2001-05-22 | 2001-05-22 | Autoamtic pressure-regulating and water injection machine used in oil-field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01237904 CN2483506Y (en) | 2001-05-22 | 2001-05-22 | Autoamtic pressure-regulating and water injection machine used in oil-field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2483506Y true CN2483506Y (en) | 2002-03-27 |
Family
ID=33650625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01237904 Expired - Fee Related CN2483506Y (en) | 2001-05-22 | 2001-05-22 | Autoamtic pressure-regulating and water injection machine used in oil-field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2483506Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383769A (en) * | 2011-10-14 | 2012-03-21 | 上海大学 | Power compensation type hydraulic pressurizing water injection system |
| CN102979473A (en) * | 2012-11-28 | 2013-03-20 | 中国石油天然气股份有限公司 | Layered pulse pressurizing and deblocking device and method for oilfield water injection well |
| CN102094607B (en) * | 2009-12-14 | 2014-03-05 | 安东石油技术（集团）有限公司 | Equipment and method for injecting water into high and low pressure wells |
| CN102094608B (en) * | 2009-12-14 | 2014-03-05 | 安东石油技术（集团）有限公司 | Automatic water power pressure adjustment system |
| CN108087258A (en) * | 2017-12-29 | 2018-05-29 | 中国石油大学(华东) | A kind of automatic Regulation water injecting pump energy-saving control system and water filling adjusting method |
| CN109931041A (en) * | 2019-03-15 | 2019-06-25 | 中国石油大学(华东) | A kind of fracture hole type carbonate water filling device and method |
-
2001
- 2001-05-22 CN CN 01237904 patent/CN2483506Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094607B (en) * | 2009-12-14 | 2014-03-05 | 安东石油技术（集团）有限公司 | Equipment and method for injecting water into high and low pressure wells |
| CN102094608B (en) * | 2009-12-14 | 2014-03-05 | 安东石油技术（集团）有限公司 | Automatic water power pressure adjustment system |
| CN102383769A (en) * | 2011-10-14 | 2012-03-21 | 上海大学 | Power compensation type hydraulic pressurizing water injection system |
| CN102979473A (en) * | 2012-11-28 | 2013-03-20 | 中国石油天然气股份有限公司 | Layered pulse pressurizing and deblocking device and method for oilfield water injection well |
| CN102979473B (en) * | 2012-11-28 | 2015-07-08 | 中国石油天然气股份有限公司 | Layered pulse pressurizing and deblocking device and method for oilfield water injection well |
| CN108087258A (en) * | 2017-12-29 | 2018-05-29 | 中国石油大学(华东) | A kind of automatic Regulation water injecting pump energy-saving control system and water filling adjusting method |
| CN109931041A (en) * | 2019-03-15 | 2019-06-25 | 中国石油大学(华东) | A kind of fracture hole type carbonate water filling device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100567730C (en) | Hydraulic drive fluid pump | |
| CN101230849B (en) | Double-piston hydropower pressure regulating pump | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN2483506Y (en) | Autoamtic pressure-regulating and water injection machine used in oil-field | |
| CN104929992A (en) | Energy-saving design method for variable-load servo control system | |
| CN2885800Y (en) | Hydraulic elevator | |
| CN111520305B (en) | Secondary booster pump for oilfield water injection | |
| CN203051016U (en) | Oilfield water injection unpowered pressurization system | |
| CN204457649U (en) | Oil well liquid drive oil pumping system | |
| CN102094608B (en) | Automatic water power pressure adjustment system | |
| CN1757915A (en) | Ground dual-pressure hydraulic filling booster pump | |
| CN103062007B (en) | Power-free pressurizing system for water injection of oilfield | |
| CN2511792Y (en) | Water flooding equipment for boosting well pressure | |
| CN201588618U (en) | Hydraulic automatic pressure regulating device | |
| CN2869487Y (en) | Feedback fluid-controlled automatic pressure regulating valve | |
| CN103362898A (en) | Multi-pressure-source energy-saving hydraulic system | |
| CN201236777Y (en) | Hydraulic slush pump | |
| CN109185239A (en) | A kind of tidal power generation pressure charging system | |
| CN101865102B (en) | Automatic hydraulic augmented injection pump | |
| CN108087258A (en) | A kind of automatic Regulation water injecting pump energy-saving control system and water filling adjusting method | |
| CN101029634A (en) | Multi-purpose hydraulic negative-feedback pump | |
| CN104214090B (en) | An integral structure of a gear pump and a jet flow valve | |
| CN102094607B (en) | Equipment and method for injecting water into high and low pressure wells | |
| CN1213217C (en) | Boosting water injector for oil field | |
| CN209294151U (en) | Energy storage type is from pressure release pressurized construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |