CN111957258B - Hydraulic transmission type fracturing pry - Google Patents
Hydraulic transmission type fracturing pry Download PDFInfo
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- CN111957258B CN111957258B CN202010824544.5A CN202010824544A CN111957258B CN 111957258 B CN111957258 B CN 111957258B CN 202010824544 A CN202010824544 A CN 202010824544A CN 111957258 B CN111957258 B CN 111957258B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 241000883990 Flabellum Species 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims 2
- 238000005553 drilling Methods 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000013049 sediment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/711—Feed mechanisms for feeding a mixture of components, i.e. solids in liquid, solids in a gas stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/49—Mixing drilled material or ingredients for well-drilling, earth-drilling or deep-drilling compositions with liquids to obtain slurries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention provides a hydraulic transmission type fracturing pry which comprises a fracturing pry body and a pretreatment device, wherein the pretreatment device comprises a plurality of flow dividing devices and an outer treatment tank, each flow dividing device comprises a straight-flow pipe and a flow dividing branch pipe, an electric valve I is installed on each flow dividing branch pipe, a plurality of through holes are formed in the edge of the top of the outer treatment tank, one ends of the straight-flow pipes of the flow dividing devices respectively penetrate through the through holes and are fixedly installed in the through holes, the hydraulic transmission type fracturing pry is reasonable in design, the outer cylinder and the inner cylinder are matched with each other, a plurality of raw material tanks are installed at the top of the outer treatment tank, and raw materials can be added according to the matching and configuration requirements of drilling fluid and according to different orders, so that the drilling fluid can reach a better state, and the production efficiency of.
Description
Technical Field
The invention belongs to the technical field of oilfield equipment, and particularly relates to a hydraulic transmission type fracturing pry.
Background
The fracturing pry is important equipment for improving the permeability of an oil-gas layer so as to improve the yield of an oil well and a gas well and injecting high-pressure liquid into a stratum under pressure, can be pumped and injected with various working media such as clear water, slurry liquid, surfactant or high-viscosity liquid and the like, when a plurality of media are added, the media need to be mixed, if the mixing is not carried out, the drilling fluid is easy to generate bulk polymers, the dispersed and uniform drilling fluid can not be obtained in a short time, however, the existing fracturing pry can not pretreat raw materials, has low mixing efficiency, can not selectively premix more than two raw materials according to the properties of the raw materials, has low processing efficiency, and the raw materials which are easy to react or polymerize cannot be separately treated, so that the quality and the processing efficiency of the drilling fluid are influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the hydraulic transmission type fracturing pry which is reasonable in design, the top of the outer treatment tank is provided with the plurality of raw material tanks, and raw materials can be added according to different sequences according to the matching and configuration requirements of drilling fluid, so that the drilling fluid can reach a better state, and the production efficiency of the drilling fluid can be improved.
In order to achieve the purpose, the invention is realized by the following technical scheme: a hydraulic transmission type fracturing pry comprises a fracturing pry body and a pretreatment device, wherein the pretreatment device comprises a plurality of shunt devices and an outer treatment tank, each shunt device comprises a direct-current pipe and a shunt branch pipe, an electric valve I is installed on each shunt branch pipe, a plurality of through holes and a plurality of through holes are formed in the edge of the top of the outer treatment tank, one end of the direct-current pipe of each shunt device penetrates through the through holes respectively and is fixedly installed in the through holes, springs are fixedly connected to the inner side wall of the bottom of the direct-current pipe, movable seats are installed in the direct-current pipe and are fixedly connected with the springs, a raw material tank is fixedly installed at the top of the direct-current pipe, an electric push rod is fixedly installed at the central position of the top of the raw material tank, a piston is installed in the raw material tank, the piston is fixedly connected with an output shaft of the electric push rod, an, the utility model discloses a processing tank, including outer processing tank, motor shell, dwang, electric motor, electric valve two, outer processing tank, motor shell and outer processing tank, the central point at outer processing tank top puts fixed mounting and has motor shell one, fixed mounting has step motor one in the motor shell, fixedly connected with dwang on step motor one's the output shaft, the through-hole has been seted up between motor shell one and the outer processing tank, the one end of dwang is passed the through-hole and is extended to the bottom of interior processing tank, the one end fixed mounting that the dwang is in interior processing tank has the flabellum, the equal fixedly connected with discharging pipe in both sides of interior processing tank bottom, install electric valve two on the discharging pipe, the bottom fixed mounting of outer processing tank has motor shell two, fixed mounting has step motor two in.
As a preferred embodiment of the invention, the pretreatment device is fixedly installed on the top of the fracturing pry body.
In a preferred embodiment of the present invention, the number of the second motor casing and the number of the stirring impellers are 2.
In a preferred embodiment of the present invention, a dc branch pipe is fixedly connected to one side of the dc pipe.
As a preferred embodiment of the present invention, a feeding pipe is fixedly connected to the bottom of one side of the raw material tank, and a third electric valve is installed on the feeding pipe.
In a preferred embodiment of the present invention, a material discharge pipe is fixedly connected to a central position of the bottom of the outer treatment tank, and an electric valve four is installed on the material discharge pipe.
The invention has the beneficial effects that: the invention discloses a hydraulic transmission type fracturing pry which comprises a fracturing pry body, a pretreatment device, a flow dividing device, a direct current pipe, a flow dividing branch pipe, a first electric valve, a movable seat, a spring, a direct current branch pipe, a raw material tank, an electric push rod, a piston, an inner treatment tank, a first motor shell, a first stepping motor, a rotating rod, fan blades, a discharge pipe, a second electric valve, a feed pipe, a third electric valve, an outer treatment tank, a second motor shell, a second stepping motor, a stirring impeller, a discharge pipe and a fourth electric valve.
1. This hydraulic transmission type fracturing sled's a plurality of head tank is installed at the top of outer treatment tank, can add the raw materials according to the order of difference according to the cooperation and the configuration demand of drilling fluid to can make drilling fluid reach better state, and can improve the production efficiency of drilling fluid.
2. This hydraulic drive type fracturing sled's outer treatment jar has installed interior treatment jar in, interior treatment jar can mix more than two kinds of raw materials in advance, on the one hand, outer treatment jar also can mix more than two kinds of raw materials simultaneously, under mutually supporting, can effectual improvement efficiency of processing, and can separate the processing with the raw materials of easy emergence reaction or polymerization, avoid producing bulk polymer and influencing machining efficiency when mixing the initial, on the other hand, install the flabellum that can upwards carry interior treatment raw materials in the jar, when mixing, can upwards carry the sediment of bottom, improve the effect and the efficiency of mixing.
3. This diverging device of hydraulic drive type fracturing sled can carry the raw materials to outer treatment tank or interior processing jar in as required, and the flexibility is strong to installed the sliding seat in diverging device's the direct current pipe, the spring has been installed to the sliding seat bottom, when electric putter extends, the sliding seat moves down, exposes direct current branch pipe, can pass through direct current branch pipe output with the raw materials of fixed quantity, and when electric putter stopped, the sliding seat sealed direct current branch pipe, and accuracy nature is high.
Drawings
Fig. 1 is a schematic cross-sectional view of a pretreatment device of a hydraulic transmission type fracturing pry;
FIG. 2 is a schematic structural view of a hydraulic transmission type fracturing pry pretreatment device;
FIG. 3 is a schematic cross-sectional view of a flow divider of a hydraulically driven fracturing pry;
FIG. 4 is a schematic structural view of a hydraulically driven frac sled;
in the figure: 1. a fracturing pry body; 2. a pretreatment device; 3. a flow divider; 4. a DC pipe; 5. a branch pipe; 6. a first electric valve; 7. a movable seat; 8. a spring; 9. a direct current branch pipe; 10. a raw material tank; 11. an electric push rod; 12. a piston; 13. an inner treatment tank; 14. a motor shell I; 15. a first stepping motor; 16. rotating the rod; 17. a fan blade; 18. a discharge pipe; 19. an electric valve II; 20. a feed pipe; 21. an electric valve III; 22. an external treatment tank; 23. a motor shell II; 24. a second stepping motor; 25. a stirring impeller; 26. a discharge pipe; 27. and an electric valve IV.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: a hydraulic transmission type fracturing pry comprises a fracturing pry body 1 and a pretreatment device 2, wherein the pretreatment device 2 comprises a plurality of shunt device 3 and an outer treatment tank 22, the shunt device 3 comprises a direct current pipe 4 and a shunt branch pipe 5, a first electric valve 6 is installed on the shunt branch pipe 5, a plurality of through holes and a plurality of through holes are formed in the edge of the top of the outer treatment tank 22, one end of the direct current pipe 4 of the shunt device 3 penetrates through the through holes respectively and is fixedly installed in the through holes, a spring 8 is fixedly connected to the inner side wall of the bottom of the direct current pipe 4, a movable seat 7 is installed in the direct current pipe 4, the movable seat 7 is fixedly connected with the spring 8, a raw material tank 10 is fixedly installed at the top of the direct current pipe 4, an electric push rod 11 is fixedly installed at the center position of the top of the raw material tank 10, a piston 12 is installed, the piston 12 is fixedly connected with an output shaft of the electric push rod 11, an inner treatment tank 13 is fixedly mounted on the inner side wall of the top of the outer treatment tank 22, a motor casing 14 is fixedly mounted at the central position of the top of the outer treatment tank 22, a stepping motor 15 is fixedly mounted in the motor casing 14, a rotating rod 16 is fixedly connected to the output shaft of the stepping motor 15, a through hole is formed between the motor casing 14 and the outer treatment tank 22, one end of the rotating rod 16 penetrates through the through hole and extends to the bottom of the inner treatment tank 13, a fan blade 17 is fixedly mounted at one end of the rotating rod 16 in the inner treatment tank 13, discharge pipes 18 are fixedly connected to two sides of the bottom of the inner treatment tank 13, an electric valve II 19 is mounted on the discharge pipes 18, a motor casing II 23 is fixedly mounted at the bottom of the outer treatment tank 22, and a stepping motor II 24 is fixedly mounted in the motor, and a stirring impeller 25 is arranged in the bottom of the outer treatment tank 22, and the stirring impeller 25 is fixedly installed on an output shaft of the second stepping motor 24.
As a preferred embodiment of the present invention, the pretreatment device 2 is fixedly installed on the top of the fracturing pry body 1.
In a preferred embodiment of the present invention, the number of the second motor casing 23 and the number of the stirring impellers 25 are 2.
In a preferred embodiment of the present invention, a dc branch pipe 9 is fixedly connected to one side of the dc pipe 4.
In a preferred embodiment of the present invention, a feeding pipe 20 is fixedly connected to the bottom of one side of the raw material tank 10, and an electric valve three 21 is installed on the feeding pipe 20.
In a preferred embodiment of the present invention, a discharge pipe 26 is fixedly connected to a central position of the bottom of the outer treatment tank 22, and an electric valve four 27 is installed on the discharge pipe 26.
In a preferred embodiment of the present invention, a plurality of raw material tanks 10 are installed on the top of the outer treatment tank 22, and the raw materials can be added in different orders according to the mixing and allocation requirements of the drilling fluid, so that the drilling fluid can be in a better state, and the production efficiency of the drilling fluid can be improved, the inner treatment tank 13 is installed in the outer treatment tank 22, and the inner treatment tank 13 can premix more than two kinds of raw materials, on one hand, the outer treatment tank 22 can simultaneously mix more than two kinds of raw materials, and the processing efficiency can be effectively improved by matching with each other, and the raw materials which are easy to react or polymerize can be separately processed, thereby avoiding the generation of bulk polymers at the initial mixing to affect the processing efficiency, on the other hand, the inner treatment tank 13 is installed with fan blades 17 which can upwardly convey the raw materials, and on the one hand, the fan blades 17 can play a role of stirring and mixing, on the other hand, the bottom sediment can be conveyed upwards, the mixing effect and efficiency are improved, the flow dividing device 3 connected with the raw material tank 10 can convey the raw materials into the outer treatment tank 22 or the inner treatment tank 13 as required, when the raw materials are required to be conveyed into the inner treatment tank 13, the electric valve 6 on the flow dividing branch pipe 5 corresponding to the corresponding raw material tank 10 is opened, the flexibility is strong, when the specific raw materials are required to be added into the outer treatment tank 22, the electric push rod 11 corresponding to the top of the raw material tank 10 is controlled to extend, the movable seat 7 is installed in the straight flow pipe 4 of the flow dividing device 3, the spring 8 is installed at the bottom of the movable seat 7, when the electric push rod 11 extends, the movable seat 7 moves downwards, the straight flow branch pipe 9 is exposed, the fixed amount of raw materials can be output through the straight flow branch pipe 9, and when the electric push rod 11 stops, the straight flow branch pipe 9 is sealed by the movable seat, the precision is high, before using, need be connected to the control system of fracturing sled body 1 with electric valve one 6, electric valve two 19, electric valve three 21, electric valve four 27, step motor one 15, step motor two 24 and electric putter 11, be connected to each raw materials supply mechanism with inlet pipe 20, the raw materials is liquid or solid-liquid mixed solution.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a hydraulic transmission type fracturing sled, includes fracturing sled body (1) and preprocessing device (2), its characterized in that, preprocessing device (2) include a plurality of diverging device (3) and outer treatment tank (22), diverging device (3) include direct current pipe (4) and reposition of redundant personnel branch pipe (5), install electric valve (6) on reposition of redundant personnel branch pipe (5), a plurality of through-hole has been seted up to the edge at outer treatment tank (22) top, a plurality of the one end of direct current pipe (4) of diverging device (3) passes a plurality of through-holes respectively and fixed mounting in the through-hole, fixedly connected with spring (8) on the inside wall of direct current pipe (4) bottom, install sliding seat (7) in direct current pipe (4), sliding seat (7) and spring (8) fixed connection, the top fixed mounting of direct current pipe (4) has raw material jar (10), the central point at head of feed cylinder (10) department of putting fixed mounting has electric putter (11), install piston (12) in head of cylinder (10), piston (12) and electric putter's (11) output shaft fixed connection, fixed mounting has interior processing tank (13) on the inside wall at outer processing tank (22) top, the central point at outer processing tank (22) top department of fixed mounting has motor casing (14), fixed mounting has step motor (15) in motor casing (14), fixedly connected with dwang (16) on the output shaft of step motor (15), the through-hole has been seted up between motor casing (14) and outer processing tank (22), the one end of dwang (16) passes the through-hole and extends to the bottom of interior processing tank (13), the one end fixed mounting that dwang (16) is in interior processing tank (13) has flabellum (17), the equal fixedly connected with discharging pipe (18) in both sides of interior processing tank (13) bottom, install two (19) of electric valve on discharging pipe (18), the bottom fixed mounting of outer processing tank (22) has two (23) of motor casing, fixed mounting has two (24) of step motor in two (23) of motor casing, be provided with impeller (25) in the bottom of outer processing tank (22), impeller (25) fixed mounting is on the output shaft of two (24) of step motor.
2. The hydraulically driven fracturing pry of claim 1, wherein: the pretreatment device (2) is fixedly arranged at the top of the fracturing pry body (1).
3. The hydraulically driven fracturing pry of claim 1, wherein: the number of the second motor shell (23) and the number of the stirring impellers (25) are 2.
4. The hydraulically driven fracturing pry of claim 1, wherein: one side of the straight-flow pipe (4) is fixedly connected with a straight-flow branch pipe (9).
5. The hydraulically driven fracturing pry of claim 1, wherein: the bottom fixedly connected with inlet pipe (20) of head tank (10) one side, install electric valve three (21) on inlet pipe (20).
6. The hydraulically driven fracturing pry of claim 1, wherein: the central point department fixedly connected with of outer processing jar (22) bottom arranges material pipe (26), it installs electric valve four (27) on material pipe (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824544.5A CN111957258B (en) | 2020-08-17 | 2020-08-17 | Hydraulic transmission type fracturing pry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010824544.5A CN111957258B (en) | 2020-08-17 | 2020-08-17 | Hydraulic transmission type fracturing pry |
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| CN111957258A CN111957258A (en) | 2020-11-20 |
| CN111957258B true CN111957258B (en) | 2021-07-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114632435B (en) * | 2022-03-21 | 2023-02-28 | 江苏冠军科技集团股份有限公司 | Preparation device and method of high-flash-point solvent and application of preparation device |
| CN114607342B (en) * | 2022-03-28 | 2023-05-16 | 河南理工大学 | Multistage fracturing equipment of oil gas well |
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| CN211038605U (en) * | 2019-11-01 | 2020-07-17 | 江苏金虎电器有限公司 | Fracturing skid-mounted device |
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|---|---|---|---|---|
| US20070076522A1 (en) * | 2005-10-03 | 2007-04-05 | Spx Corporation | Mixing apparatus and method with ceramic impeller bearings |
| US11266958B2 (en) * | 2018-01-12 | 2022-03-08 | Mgb Oilfield Solutions, Llc | Dry additive and fluid mixing system, assembly and method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5195824A (en) * | 1991-04-12 | 1993-03-23 | Halliburton Company | Vessel agitator for early hydration of concentrated liquid gelling agent |
| CN104383869A (en) * | 2014-11-27 | 2015-03-04 | 常州市晨光汽车消声器厂 | Reaction kettle for specific liquid heating structure |
| CN205760951U (en) * | 2016-05-27 | 2016-12-07 | 开县开州水泥有限公司 | Raw material blending device |
| CN207829871U (en) * | 2018-02-06 | 2018-09-07 | 河南师范大学 | A kind of pure electric vehicle pressure break sled |
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| CN211038605U (en) * | 2019-11-01 | 2020-07-17 | 江苏金虎电器有限公司 | Fracturing skid-mounted device |
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| CN111957258A (en) | 2020-11-20 |
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