CN113266326B - Electric measuring and adjusting pressure adjusting device for polymer flooding injection well - Google Patents
Electric measuring and adjusting pressure adjusting device for polymer flooding injection well Download PDFInfo
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- CN113266326B CN113266326B CN202110813517.2A CN202110813517A CN113266326B CN 113266326 B CN113266326 B CN 113266326B CN 202110813517 A CN202110813517 A CN 202110813517A CN 113266326 B CN113266326 B CN 113266326B
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- 238000002347 injection Methods 0.000 title claims abstract description 109
- 239000007924 injection Substances 0.000 title claims abstract description 109
- 229920000642 polymer Polymers 0.000 title claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000033228 biological regulation Effects 0.000 abstract description 4
- 238000011835 investigation Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the technical field of oil exploitation, in particular to a pressure regulating device for electric testing and debugging of a polymer flooding injection well. This polymer drives electronic survey of injection well and transfers pressure regulation apparatus, through setting up first mount, electronic slide rail, electronic slider and diaphragm, the electronic survey of being convenient for transfer the case can reciprocate in first mount, through setting up electronic survey transfer case, the manometer, the pressure measuring pole, forced induction box and pressure gauge, can drive the pressure gauge and reciprocate in injection well pipe, and test the pressure of different intervals in injection well pipe, thereby obtain the effect of each injected stratum pressure value.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a pressure regulating device for electric measurement and adjustment of a polymer flooding injection well.
Background
Polymer flooding is a stimulation treatment that injects polymer into the formation to displace oil. Macroscopically, the method mainly increases the viscosity of the displacement fluid and reduces the fluidity ratio of the displacement fluid and the displaced fluid, thereby enlarging swept volume; in the microcosmic aspect, the polymer generates a stretching effect on an oil film or oil drops in the flowing process due to the inherent viscoelasticity of the polymer, so that the carrying force is increased, and the microcosmic oil washing efficiency is improved.
Injection wells are wells drilled at the edge or inside of an oil field to inject or inject water into the oil reservoir during development of the oil field, and provide a source of energy for the production of reservoir fluids. Typically, water is injected into the reservoir, while gas is used in gas reinjection and maintaining the gas cap condition, and other fluids like polymers, sulfur dioxide and steam are also utilized.
For the oil field injection development, it is very important to know the pressure of each injection stratum in detail, the injection yield and the injection efficiency are directly affected by the injection pressure of the injection well, and the pressure of each interval is different in the same well.
Therefore, we provide a pressure regulating device for electric logging of polymer flooding wells.
Disclosure of Invention
The invention aims to provide a pressure regulating device for electric logging and calling of a polymer flooding injection well, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a polymer drives injection well electronic investigation and uses pressure regulating apparatus, includes investigation ground, the last fixed surface who surveys investigation ground is connected with PMKD, PMKD's the first mount of last fixed surface fixedly connected with, the electronic slide rail of inner wall fixedly connected with of first mount, the surface of electronic slide rail is provided with electronic slider, the side fixedly connected with diaphragm of electronic slider, the electronic investigation case of positive fixedly connected with of diaphragm, the front of electronic investigation case is provided with the manometer, the lower fixed surface of electronic investigation case is connected with the pressure measurement pole, the one end fixedly connected with forced induction box of electronic investigation case is kept away from to the pressure measurement pole.
The lower surface of forced induction box is provided with the pressure gauge, the inside on survey and transfer ground is provided with tubular column in the pit, the inside of tubular column in the pit is provided with the injection well pipe, PMKD's last fixed surface is connected with the second mount, the inner wall of second mount is provided with pressure regulating box, pressure regulating box's upper surface is provided with the injection valve, the upper surface of second mount is provided with the polymer raw material case, PMKD's last fixed surface is connected with injection well trunk line, injection well trunk line's fixed surface is connected with the sleeve pipe, injection well trunk line keeps away from the one end fixedly connected with injection connecting pipe of injection well trunk line.
Preferably, the top of injection well trunk line is provided with test valve, the surface of injection well trunk line is provided with production valve and atmospheric valve respectively, the below that the surface of injection well trunk line is located test valve is provided with total valve, injection well trunk line is provided with the sleeve pipe valve with the sleeve pipe junction, sheathed tube surface is provided with sleeve pipe atmospheric valve, the one end of sleeve pipe atmospheric valve is provided with the cover and presses the table.
Preferably, a fixing plate is fixed on the lower surface of the first fixing frame, a fastening bolt is arranged on the upper surface of the fixing plate, a threaded hole matched with the fastening bolt is formed in the upper surface of the fixing base plate, and the first fixing frame is fixedly connected with the fixing base plate through the fixing plate and the fastening bolt.
Preferably, the number of the electric slide rails and the electric slide blocks is two, the electric slide rails are respectively and fixedly connected to two sides of the inner wall of the first fixing frame, the upper surface of the first fixing frame is fixedly connected with an electric cabinet, and the electric cabinet is respectively coupled with the electric slide rails and the electric slide blocks.
Preferably, the left side and the right side of the transverse plate are respectively and fixedly connected with the opposite surfaces of the two electric sliding blocks, and a pressure measurement electric element is arranged inside the electric measuring and adjusting box.
Preferably, the lower surface of the electric testing and adjusting box is provided with a through hole matched with the pressure measuring rod, the pressure measuring rod extends to the inside of the electric testing and adjusting box through the through hole, the top end of the pressure measuring rod is provided with a pressure transmission hole, and the pressure measuring rod is communicated with the pressure gauge through the pressure transmission hole.
Preferably, the upper surface of the pressure sensing box is fixedly connected with a pressure transmission pipe communicated with the pressure measuring rod, a movable ball is embedded in the surface of the pressure sensing box, the movable ball is arranged on the inner wall of the injection well pipe in a sliding mode, and an arc-shaped rubber sensing film is arranged on the lower surface of the pressure gauge.
Preferably, the upper surface of the measurement and adjustment ground is provided with a borehole matched with a downhole tubular column, the downhole tubular column extends to the inside of the measurement and adjustment ground through the borehole, the lower surface of the fixed base plate is provided with a tubular hole matched with an injection well pipe, and the injection well pipe extends to the upper surface of the fixed base plate through the tubular hole.
Preferably, the pressure regulating box is communicated with the polymer raw material box through a pipeline, the injection valve is arranged on the pipeline between the pressure regulating box and the polymer raw material box, the pressure regulating box is communicated with the injection connecting pipe, and one end, far away from the pressure regulating box, of the injection connecting pipe is communicated with the main pipeline of the injection well.
Advantageous effects
The invention provides a pressure regulating device for electric measurement and adjustment of a polymer flooding injection well, which has the following beneficial effects:
1. this polymer drives electronic survey of injection well and transfers pressure regulation apparatus, through setting up first mount, electronic slide rail, electronic slider and diaphragm, the electronic survey of being convenient for transfer the case can reciprocate in first mount, through setting up electronic survey transfer case, the manometer, the pressure measuring pole, forced induction box and pressure gauge, can drive the pressure gauge and reciprocate in injection well pipe, and test the pressure of different intervals in injection well pipe, thereby obtain the effect of each injected stratum pressure value.
2. This electronic survey of polymer flooding injection well is transferred and is used pressure regulating device, through setting up the manometer, be convenient for look over the pressure value on each injection layer of injection well, through setting up pressure regulating box, injection valve and polymer head tank, be convenient for control polymer to the injection volume of injection well, thereby control and adjust the pressure in the injection well, through setting up injection well trunk line, sleeve pipe and injection connecting pipe, be convenient for carry the polymer in the polymer head tank in the injection well, thereby reach this effect of injection well convenient regulation injection pressure.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of the structure at B in FIG. 1 according to the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 1 at C according to the present invention.
In the figure: the device comprises a measuring and adjusting ground 1, a fixed base plate 2, a first fixed frame 3, an electric sliding rail 4, an electric sliding block 5, a transverse plate 6, an electric measuring and adjusting box 7, a pressure gauge 8, a pressure measuring rod 9, a pressure sensing box 10, a pressure gauge 11, a downhole pipe column 12, an injection well pipe 13, a second fixed frame 14, a pressure adjusting box 15, an injection valve 16, a polymer raw material box 17, a main pipe line of an injection well 18, a sleeve 19, an injection connecting pipe 20, a test valve 21, a production valve 22, a vent valve 23, a main valve 24, a sleeve valve 25, a vent valve 26 and a pressure gauge 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides an electronic survey of polymer flooding injection well is transferred and is used pressure regulating apparatus, including survey and transfer ground 1, survey and transfer the upper surface fixedly connected with PMKD 2 on ground 1, PMKD 2's the first mount 3 of upper surface fixedly connected with, the lower fixed surface of first mount 3 has the fixed plate, the upper surface of fixed plate is provided with fastening bolt, PMKD 2's upper surface offer with the screw hole of fastening bolt looks adaptation, first mount 3 passes through fixed plate and fastening bolt and 2 fixed connection of PMKD.
The inner wall fixedly connected with electric slide rail 4 of first mount 3, the surface of electric slide rail 4 is provided with electronic slider 5, the quantity of electronic slide rail 4 and electronic slider 5 is two, two electronic slide rail 4 respectively fixed connection are in the inner wall both sides of first mount 3, the last fixed surface of first mount 3 is connected with the electric cabinet, the electric cabinet respectively with electronic slide rail 4 and the coupling of electronic slider 5, the side fixedly connected with diaphragm 6 of electronic slider 5, the left and right sides of diaphragm 6 respectively with two electronic slider 5's opposite face fixed connection, the electronic test and dispatch case 7 of the positive fixedly connected with of diaphragm 6, the inside of electronic test and dispatch case 7 is provided with pressure measurement electrical component, the front of electronic test and dispatch case 7 is provided with manometer 8, through setting up manometer 8, be convenient for look over the pressure value on each injection layer of injection well.
Lower fixed surface of electronic measure and regulate box 7 is connected with pressure measuring pole 9, the through-hole with pressure measuring pole 9 looks adaptation is seted up to the lower surface of electronic measure and regulate box 7, pressure measuring pole 9 extends to the inside of electronic measure and regulate box 7 through the through-hole, pressure transmission hole has been seted up on the top of pressure measuring pole 9, pressure measuring pole 9 is linked together through pressure transmission hole and manometer 8, the one end fixedly connected with forced induction box 10 of electronic measure and regulate box 7 is kept away from to pressure measuring pole 9, the last fixed surface of forced induction box 10 is connected with the pressure transmission pipe that is linked together with pressure measuring pole 9, the surface of forced induction box 10 is inlayed and is equipped with movable ball, the lower surface of forced induction box 10 is provided with pressure gauge 11, the lower surface of pressure gauge 11 is provided with arc rubber response membrane.
The inside of measure and regulate ground 1 is provided with down-hole tubular column 12, the upper surface of measure and regulate ground 1 offers the wellhole with down-hole tubular column 12 looks adaptation, down-hole tubular column 12 extends to the inside of measure and regulate ground 1 through the wellhole, the inside of down-hole tubular column 12 is provided with injects the well casing 13, the movable ball slides with the inner wall of injecting the well casing 13 and sets up, the lower surface of PMKD 2 offers the tube hole with injecting well casing 13 looks adaptation, inject the well casing 13 and extend to the upper surface of PMKD 2 through the tube hole, the upper surface fixed connection of PMKD 2 has second mount 14, the inner wall of second mount 14 is provided with pressure regulating box 15, the upper surface of pressure regulating box 15 is provided with injection valve 16.
The upper surface of second mount 14 is provided with polymer raw material tank 17, pressure regulating box 15 is linked together through pipeline and polymer raw material tank 17, injection valve 16 sets up on the pipeline between pressure regulating box 15 and polymer raw material tank 17, through setting up pressure regulating box 15, injection valve 16 and polymer raw material tank 17, be convenient for control polymer to the injection volume of injecting the well, thereby control and adjust the pressure in the injection well, PMKD 2's last fixed surface is connected with injection well main pipe 18, injection well main pipe 18's fixed surface is connected with sleeve pipe 19.
Injection well main pipe 18's top is provided with test valve 21, and injection well main pipe 18's surface is provided with production valve 22 and atmospheric valve 23 respectively, and injection well main pipe 18's surface is located test valve 21's below and is provided with total valve 24, and injection well main pipe 18 is provided with casing valve 25 with sleeve pipe 19 junction, and the surface of casing 19 is provided with sleeve pipe atmospheric valve 26, and the one end of sleeve pipe atmospheric valve 26 is provided with the cover and presses table 27.
Through setting up first mount 3, electronic slide rail 4, electronic slider 5 and diaphragm 6, be convenient for electronic measure and regulate case 7 can reciprocate in first mount 3, through setting up electronic measure and regulate case 7, manometer 8, pressure measurement pole 9, forced induction box 10 and pressure gauge 11, can drive pressure gauge 11 and reciprocate in injection well casing 13, and test the pressure of different intervals in injection well casing 13, thereby obtain the effect of each injection stratum pressure value.
The working principle is as follows: when the electric pressure regulating device for polymer flooding injection well is used, firstly, the injection valve 16 is opened, the polymer in the polymer raw material tank 17 is conveyed into the injection connecting pipe 20 through the pressure regulating tank 15, the production valve 22 and the main valve 24 are opened, the polymer is conveyed into the injection well, then the electric testing and adjusting box 7 on the first fixed frame 3 is started, the electric slide block 5 moves downwards on the electric slide rail 4 to drive the pressure measuring rod 9 to extend into the injection well pipe 13, the pressure sensing box 10 drives the pressure gauge 11 to measure the pressure of the polymer injected into each layer end in the injection well, and the pressure value of the injected polymer in each interval in the injection well is obtained through displaying on a pressure gauge 8, the injection amount of the polymer by the injection valve 16 is then controlled and regulated by the pressure regulating tank 15, thereby achieving the effect of regulating the pressure in the injection well.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An electronic survey and dispatch pressure regulating device of polymer flooding injection well, includes survey and dispatch ground (1), its characterized in that: the upper surface of the testing and adjusting ground (1) is fixedly connected with a fixed bottom plate (2), the upper surface of the fixed bottom plate (2) is fixedly connected with a first fixed frame (3), the inner wall of the first fixed frame (3) is fixedly connected with an electric slide rail (4), the surface of the electric slide rail (4) is provided with an electric slide block (5), the side surface of the electric slide block (5) is fixedly connected with a transverse plate (6), the front surface of the transverse plate (6) is fixedly connected with an electric testing and adjusting box (7), the front surface of the electric testing and adjusting box (7) is provided with a pressure gauge (8), the lower surface of the electric testing and adjusting box (7) is fixedly connected with a pressure measuring rod (9), and one end, far away from the electric testing and adjusting box (7), of the pressure measuring rod (9) is fixedly connected with a pressure sensing box (10);
the lower surface of the pressure induction box (10) is provided with a pressure gauge (11), the inside of the measuring and adjusting ground (1) is provided with a downhole pipe column (12), an injection well pipe (13) is arranged in the underground pipe column (12), the upper surface of the fixed bottom plate (2) is fixedly connected with a second fixed frame (14), a pressure adjusting box (15) is arranged on the inner wall of the second fixing frame (14), an injection valve (16) is arranged on the upper surface of the pressure adjusting box (15), the upper surface of the second fixing frame (14) is provided with a polymer raw material box (17), the upper surface of the fixed bottom plate (2) is fixedly connected with an injection well main pipeline (18), the surface of the main injection well pipe (18) is fixedly connected with a sleeve (19), one end of the sleeve (19) far away from the main injection well pipe (18) is fixedly connected with an injection connecting pipe (20);
pressure regulating box (15) are linked together through pipeline and former feed tank of polymer (17), injection valve (16) set up on the pipeline between pressure regulating box (15) and former feed tank of polymer (17), pressure regulating box (15) are linked together with injection connecting pipe (20), the one end that pressure regulating box (15) was kept away from in injection connecting pipe (20) is linked together with injection well main pipe (18).
2. The device for regulating the pressure for electric logging of a polymer flooding well according to claim 1, characterized in that: the top of injection well main pipeline (18) is provided with test valve (21), the surface of injection well main pipeline (18) is provided with production valve (22) and atmospheric valve (23) respectively, the below that the surface of injection well main pipeline (18) is located test valve (21) is provided with main valve (24), injection well main pipeline (18) and sleeve pipe (19) junction are provided with sleeve pipe valve (25), the surface of injection well main pipeline (18) is provided with sleeve pipe atmospheric valve (26), the one end of sleeve pipe atmospheric valve (26) is provided with cover barometer (27).
3. The device for regulating the pressure for electric logging of a polymer flooding well according to claim 1, characterized in that: the lower surface of the first fixing frame (3) is fixed with a fixing plate, the upper surface of the fixing plate is provided with a fastening bolt, the upper surface of the fixing base plate (2) is provided with a threaded hole matched with the fastening bolt, and the first fixing frame (3) is fixedly connected with the fixing base plate (2) through the fixing plate and the fastening bolt.
4. The device for regulating the pressure for electric logging of a polymer flooding well according to claim 1, characterized in that: the electric slide rail fixing device is characterized in that the number of the electric slide rails (4) and the number of the electric slide blocks (5) are two, the electric slide rails (4) are fixedly connected to two sides of the inner wall of the first fixing frame (3) respectively, an electric cabinet is fixedly connected to the upper surface of the first fixing frame (3), and the electric cabinet is coupled with the electric slide rails (4) and the electric slide blocks (5) respectively.
5. The device for regulating the pressure of an electric logging tool for polymer flooding injection well according to claim 4, characterized in that: the left side and the right side of the transverse plate (6) are respectively fixedly connected with the opposite surfaces of the two electric sliding blocks (5), and pressure measurement electric elements are arranged inside the electric measuring and adjusting box (7).
6. The device for regulating the pressure for electric logging of a polymer flooding well according to claim 1, characterized in that: the lower surface of the electric testing and adjusting box (7) is provided with a through hole matched with the pressure measuring rod (9), the pressure measuring rod (9) extends to the inside of the electric testing and adjusting box (7) through the through hole, the top end of the pressure measuring rod (9) is provided with a pressure transmission hole, and the pressure measuring rod (9) is communicated with the pressure gauge (8) through the pressure transmission hole.
7. The device for regulating the pressure of an electric logging tool for polymer flooding injection well according to claim 6, characterized in that: the pressure-transmitting pipe is fixedly connected with the upper surface of the pressure sensing box (10) and communicated with the pressure measuring rod (9), a movable ball is embedded in the surface of the pressure sensing box (10), the movable ball and the inner wall of the injection well pipe (13) are arranged in a sliding mode, and an arc-shaped rubber sensing film is arranged on the lower surface of the pressure gauge (11).
8. The device for regulating the pressure for electric logging of a polymer flooding well according to claim 1, characterized in that: the upper surface of the measuring and adjusting ground (1) is provided with a well hole matched with the underground pipe column (12), the underground pipe column (12) extends into the measuring and adjusting ground (1) through the well hole, the lower surface of the fixed base plate (2) is provided with a pipe hole matched with the injection well pipe (13), and the injection well pipe (13) extends to the upper surface of the fixed base plate (2) through the pipe hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813517.2A CN113266326B (en) | 2021-07-19 | 2021-07-19 | Electric measuring and adjusting pressure adjusting device for polymer flooding injection well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813517.2A CN113266326B (en) | 2021-07-19 | 2021-07-19 | Electric measuring and adjusting pressure adjusting device for polymer flooding injection well |
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| CN113266326A CN113266326A (en) | 2021-08-17 |
| CN113266326B true CN113266326B (en) | 2021-09-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2737940Y (en) * | 2004-10-12 | 2005-11-02 | 大庆油田有限责任公司 | Measuring-regulating linkage ground control system |
| US9777569B2 (en) * | 2013-11-18 | 2017-10-03 | Weatherford Technology Holdings, Llc | Running tool |
| CN105443093B (en) * | 2015-12-16 | 2018-07-17 | 中国石油大学(北京) | Well head combined measuring device and its method for injection well |
| CN109252841A (en) * | 2018-11-16 | 2019-01-22 | 中国海洋石油集团有限公司 | The system and method for improving injection well injectability based on electromagnetic wave wireless monitor |
| CN112240185B (en) * | 2020-10-26 | 2023-04-07 | 中国石油天然气股份有限公司 | Injection regulating assembly, injection allocator, and polymer injection dynamic blending device and process |
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