CN111911123A - Skid-mounted equipment for fracturing - Google Patents
Skid-mounted equipment for fracturing Download PDFInfo
- Publication number
- CN111911123A CN111911123A CN202010676753.XA CN202010676753A CN111911123A CN 111911123 A CN111911123 A CN 111911123A CN 202010676753 A CN202010676753 A CN 202010676753A CN 111911123 A CN111911123 A CN 111911123A
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- Prior art keywords
- skid
- machine
- fracturing pump
- fracturing
- frequency conversion
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- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims description 20
- 230000017525 heat dissipation Effects 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- 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)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to skid-mounted equipment for fracturing, which comprises a skid body frame (1), and a fracturing pump (2) and a frequency conversion all-in-one machine (3) which are arranged in the skid body frame (1). The fracturing pump (2) is used for outputting mixed liquid for fracturing. In addition, the frequency conversion all-in-one machine (3) is connected with the fracturing pump (2) so as to drive the fracturing pump (2). The invention can reduce tail gas emission and noise pollution and is convenient for integral transportation.
Description
Technical Field
The present invention relates generally to the field of fracturing equipment. More particularly, the invention relates to skid-mounted equipment for fracturing.
Background
At present, a fracturing pump used in an oil field is mostly driven by a diesel engine or an electric motor. Among them, the existing diesel engine generates a large noise when operating, and also pollutes the surrounding environment by exhaust gas. In addition, the existing motor for driving the fracturing pump generally adopts a frequency converter for driving, but the frequency converter and the motor are in a separated structure, so that the volume is large when the fracturing pump is transported integrally, and when the number of motors used on site is large, the connecting lines are easy to be disordered and staggered, and the short circuit is easy to occur.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, the present invention aims to provide a skid-mounted device for fracturing, which can reduce exhaust emission and noise pollution and is convenient for overall transportation.
In order to achieve the above object, the present invention provides a skid-mounted device for fracturing, comprising:
a pry body frame; and
disposed within the pry frame:
-a fracturing pump for outputting a fracturing mixture; and
-a variable frequency all-in-one machine connected with the fracturing pump for driving the fracturing pump.
In one embodiment, the skid-mounted equipment further comprises a wire inlet cabinet arranged in the skid body frame, wherein a binding post connected with the frequency conversion all-in-one machine and a power supply is arranged in the wire inlet cabinet so as to supply power to the frequency conversion all-in-one machine.
In one embodiment, the skid further comprises a transformer fixed in the skid frame, the transformer is respectively connected with the variable frequency all-in-one machine and the inlet cabinet and is configured to convert the input high-voltage power into alternating current suitable for driving the variable frequency all-in-one machine.
In one embodiment, one end of the pry frame is provided with a housing for accommodating the transformer.
In one embodiment, the skid-mounted device further comprises a heat dissipation device fixed in the skid body frame, and the heat dissipation device is respectively connected with the fracturing pump and the frequency conversion all-in-one machine and is configured to dissipate heat of the fracturing pump and the frequency conversion all-in-one machine.
In one embodiment, the all-in-one frequency converter comprises an electric motor and a frequency converter connected with the electric motor, a cooling water channel is arranged on a shell of the electric motor, and the frequency converter is configured to control the output power of the electric motor.
In one embodiment, the heat dissipation device comprises a heat dissipation fin group, and a first cooling pipeline and a second cooling pipeline which respectively penetrate through the heat dissipation fin group, wherein the first cooling pipeline is connected with the fracturing pump to form a closed loop so as to convey lubricating oil, and the second cooling pipeline is connected with a cooling water channel of the variable frequency all-in-one machine to form a closed loop so as to convey cooling liquid.
In one embodiment, the variable frequency all-in-one machine comprises a protective box fixed on the motor, and the frequency converter is fixed in the protective box.
In one embodiment, the skid-mounted device further comprises an operation box fixed on the skid body frame, and a switch used for controlling the operation of a motor and a lighting device in the skid-mounted device is arranged on the operation box.
In one embodiment, the fracturing pump and the variable frequency all-in-one machine are connected through a coupling.
Compared with the prior art, the fracturing pump and the frequency conversion all-in-one machine are integrated through the arranged prying body frame, and the fracturing pump and the frequency conversion all-in-one machine can be conveniently transported. Meanwhile, the pollution caused by tail gas generated when the fuel engine is adopted can be reduced by replacing the conventional fuel engine with the frequency conversion integrated machine. In addition, the replaced frequency conversion all-in-one machine is more stable when the frequency conversion all-in-one machine runs relative to a fuel engine, so that larger noise is not easy to generate.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic diagram showing the construction of a skid according to an embodiment of the present invention; and
fig. 2 is a schematic cross-sectional view illustrating a skid according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view showing a skid 100 according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional view illustrating the skid 100 according to an embodiment of the present invention. As shown in fig. 1 and 2, the present invention provides a skid 100 that may be used in connection with fracturing operations in an oil field. In one embodiment, the skid 100 may include a skid frame 1 and a fracturing pump 2 and variable frequency integration machine 3 disposed within the skid frame 1. The fracturing pump 2 can be used for outputting mixed liquid for fracturing. In addition, the frequency conversion all-in-one machine 3 can be connected with the fracturing pump 2 so as to drive the fracturing pump 2. In actual operation, the skid 100 is first transported by a transport vehicle to a predetermined location in the field. And then, connecting the fracturing pump 2 with a corresponding output manifold and connecting the frequency conversion integrated machine 3 with an external power supply. Finally, the skid-mounted equipment 100 enables the fracturing pump 2 to operate through the driving action of the frequency conversion all-in-one machine 3, and therefore the related fracturing operation of the oil field is completed.
In one embodiment, the variable-frequency all-in-one machine 3 may be provided with a fixing seat, the fixing seat may be provided with a plurality of first mounting holes, the pry body frame 1 may be provided with second mounting holes matching the first mounting holes in position and number, and the first mounting holes and the second mounting holes are fixed by bolts. Further, the fixing seat can comprise a supporting plate and a connecting plate, wherein one side face of the supporting plate is used for being fixedly attached to the pry body frame 1, and two side edges of the supporting plate are fixedly connected with the shell of the frequency conversion all-in-one machine 3 and the other side face of the supporting plate respectively. Wherein, be equipped with a plurality of first mounting holes in the backup pad. Furthermore, the fixing seat can further comprise reinforcing ribs fixed with the frequency conversion all-in-one machine 3 and the supporting plate, and the reinforcing ribs have the effect similar to that of the connecting plate, so that the supporting capacity of the whole fixing seat on the frequency conversion all-in-one machine 3 can be improved. In addition, the number of the fixing seats can be selected according to requirements. In one embodiment, a fixing base may be provided and disposed at the bottom of the convertible frequency all-in-one machine 3 to complete the support of the convertible frequency all-in-one machine 3. In another embodiment, two fixing seats may be provided and symmetrically disposed on two sides of the bottom of the frequency conversion all-in-one machine 3, so that the whole amount of the fixing seats can be reduced while the fixing seats can support the frequency conversion all-in-one machine 3 well, and the cost of the skid-mounted device 100 can be reduced. In addition, the lifting lugs are arranged on the frequency conversion all-in-one machine 3, and when the frequency conversion all-in-one machine 3 needs to be replaced or installed, the lifting lugs can be fixed on the lifting lugs of the frequency conversion all-in-one machine 3 through a crane, so that the subsequent lifting and lowering operation of the frequency conversion all-in-one machine 3 can be completed.
In one embodiment, the skid-mounted device 100 may further include a power inlet cabinet 4 disposed in the skid frame 1, in which terminals respectively connected to the inverter machine 3 and a power source are disposed so as to supply power to the inverter machine 3. Further, the inlet cabinet 4 may include a cabinet body fixed to the pry frame 1 and a cover body rotatably connected to the cabinet body, and the cover body may cover the cabinet body, so as to protect the terminal when the terminal is not connected to the power supply. In addition, the input frequency of the binding post can be selected according to different input voltages. In one embodiment, the nominal input frequency is 50Hz when the nominal input voltage is 10 kV. In another embodiment, the nominal input frequency is 60Hz when the nominal input voltage is 13.8 kV.
In one embodiment, the skid 100 may further include a transformer 5 fixed in the skid frame 1, wherein the transformer 5 is connected to the variable frequency all-in-one machine 3 and the inlet cabinet 4, respectively, and is configured to convert the input high voltage into an alternating current suitable for driving the variable frequency all-in-one machine 3. Preferably, the transformer 5 has a capacity of 2500 kilo-volt and more, and outputs an alternating current with a voltage of 2 x 1700 volt. In addition, the all-in-one inverter 3 may include a motor and an inverter connected to the motor, a cooling water channel is provided on a casing of the motor, and the inverter is configured to control an output power of the motor. Further, the frequency conversion all-in-one machine 3 can comprise a protection box body fixed on the motor, and the frequency converter is fixed in the protection box body. The protective box body has the characteristics of dust prevention and rain prevention, so that the frequency converter can be protected, and the service life of the frequency converter is prolonged. Further, the protection level of the protection box body meets the national protection level of IP 54.
In one embodiment, one end of the pry body frame 1 may be provided with a housing 11 for accommodating the transformer 5. Through the setting of this casing 11, can play the guard action to transformer 5, avoid when rainwater weather, because the electrically conductive effect of rainwater makes transformer 5 the condition of short circuit appear. The inlet cabinet 4 may be fixed to the housing 11, and when the cover of the inlet cabinet 4 is fitted to the cabinet body, the cover forms a part of the housing 11. Furthermore, the cover body can be provided with a plurality of reinforcing ribs which can strengthen the structure of the cover body, thereby preventing the bending deformation which can occur when the area of the cover body is larger. According to the scheme of the invention, the arrangement mode of the reinforcing ribs can be selected according to requirements. In one embodiment, the plurality of ribs are arranged parallel to each other. In another embodiment, two crossed ribs may be provided on the cover.
In an actual application scenario, the structure of the pry body frame 1 can be selected according to actual requirements. In one embodiment, the pry frame 1 is a single-layer truss formed by a plurality of support beams, and the equipment (fracturing pump 2, variable frequency all-in-one machine 3, transformer 5 and the like) in the pry frame 1 is located on the same layer. In another embodiment, the pry body frame 1 is a double-layer truss formed by a plurality of supporting beams, and the devices (the fracturing pump 2, the variable frequency all-in-one machine 3, the transformer 5 and the like) in the pry body frame 1 are located on different layers. Furthermore, a plurality of inclined struts are arranged in the prying body frame 1, and two different supporting beams are respectively fixed at two ends of each inclined strut, so that the structural strength of the prying body frame 1 can be enhanced. In one application scenario, the pry body frame 1 may include two parts of a truss and a container with an opening (a structure formed by connecting a plurality of shells 11). Wherein, the open side of the container is fixed with the truss. In addition, some equipment (such as the fracturing pump 2, the variable frequency all-in-one machine 3 and the like) of the skid-mounted equipment 100 is arranged in the truss, and other equipment (such as the transformer 5, the heat dissipation device 6 and the like) which needs to be protected in the skid-mounted equipment 100 is arranged in the container.
In one embodiment, the skid-mounted device 100 may further include an operation box 7 fixed on the skid frame 1, and a switch for controlling the operation of the motor (e.g., the variable frequency all-in-one machine 3, the power end motor, etc.) and the lighting device in the skid-mounted device 100 is disposed on the operation box 7. In particular, the switch may be a knob, a button and/or a touch screen display. Further, the operation box 7 is fixed to the housing 11. In addition, the operation box 7 has a cabinet body and a cover structure similar to the inlet cabinet 4.
In one embodiment, the skid apparatus 100 may further include a heat sink 6 fixed in the skid frame 1, and the heat sink 6 may be connected to the fracturing pump 2 and the variable frequency all-in-one machine 3, respectively, and configured to dissipate heat of the fracturing pump 2 and the variable frequency all-in-one machine 3. Further, the heat dissipation device 6 may include a fin group, and a first cooling pipe and a second cooling pipe that pass through the fin group respectively, the first cooling pipe is connected with the fracturing pump 2 to form a closed loop to convey lubricating oil, and the second cooling pipe is connected with the cooling water channel of the variable frequency all-in-one machine 3 to form a closed loop to convey cooling liquid. In addition, in order to improve the heat dissipation rate of the heat dissipation fin group to the first cooling pipeline and the second cooling pipeline, different structures can be arranged. In one embodiment, the portions of the first cooling pipeline and the second cooling pipeline respectively penetrating through the fin group are both in a bent and circuitous structure, so that the volume of the first cooling pipeline and the second cooling pipeline in the fin group can be increased, and the heat dissipation effect of the fin group on the first cooling pipeline and the second cooling pipeline is improved. In another embodiment, a fan is fixed on the pry frame 1, and the fan is used for acting on the internal clearance of the fin group to accelerate the gas flow velocity at the position of the fin group, so that the heat dissipation rate of the fin group can be improved.
In a practical application scenario, the fracturing pump 2 of the skid-mounted device 100 and the frequency conversion all-in-one machine 3 can be connected through the coupler 8. Further, the configuration of the coupling 8 may be selected as desired. In one embodiment, the coupling 8 may be a universal coupling. In one or more implementation scenarios, the shaft coupling 8 may include a telescopic shaft and two universal joints fixed to two ends of the telescopic shaft respectively, and the two universal joints are connected and fixed with a driving shaft of the variable frequency all-in-one machine 3 and a driven shaft of the fracturing pump 2 respectively. Wherein, can drive two universal joint relative motion when this telescopic shaft is flexible to when making this shaft coupling 8 install between frequency conversion all-in-one 3 and fracturing pump 2, it has axial regulating variable. When the output torque of the frequency conversion all-in-one machine 3 is transmitted to the fracturing pump 2, firstly, the driving shaft of the frequency conversion all-in-one machine 3 drives the universal joint connected with the frequency conversion all-in-one machine to rotate. Then, the universal joint drives the telescopic shaft to rotate around the self axial direction. Then, the telescopic shaft can drive the universal joint connected with the driven shaft of the fracturing pump 2 to rotate, and finally the fracturing pump 2 is driven to output mixed liquid for fracturing.
As mentioned above, the fracturing pump 2 and the variable-frequency all-in-one machine 3 are integrated through the arranged prying body frame 1, and transportation is facilitated. And because the existing fuel engine is replaced by the frequency conversion all-in-one machine 3, the skid-mounted equipment 100 can reduce the pollution caused by tail gas generated when the fuel engine is adopted. Meanwhile, the maintenance workload of the frequency conversion all-in-one machine 3 is lower than that of a fuel engine, so that the maintenance cost of the skid-mounted equipment 100 is greatly reduced. In addition, the frequency conversion all-in-one machine 3 is more stable when running relative to a fuel engine, so that larger noise is not easy to generate. Thus, the skid 100 of the present disclosure also has the technical advantage of reducing noise pollution.
It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application scenarios of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A skid for fracturing, comprising:
a pry body frame (1); and
arranged inside the pry frame (1):
-a fracturing pump (2) for outputting a fracturing mixture; and
-a variable frequency unity machine (3) connected with the fracturing pump (2) for driving the fracturing pump (2).
2. The skid-mounted device as recited in claim 1, further comprising a power inlet cabinet (4) arranged in the skid body frame (1), wherein a binding post connected with the frequency conversion all-in-one machine (3) and a power supply is arranged in the power inlet cabinet so as to supply power to the frequency conversion all-in-one machine (3).
3. A skid according to claim 2, further comprising a transformer (5) fixed within the skid frame (1), the transformer (5) being connected to the variable frequency unity machine (3) and the inlet cabinet (4), respectively, and being configured to convert the incoming high voltage into an alternating current suitable for driving the variable frequency unity machine (3).
4. A skid according to claim 3, wherein one end of the skid frame (1) is provided with a casing (11) for accommodating the transformer (5).
5. The skid-mounted device as set forth in claim 1, further comprising a heat dissipation device (6) fixed in the skid frame (1), wherein the heat dissipation device (6) is connected with the fracturing pump (2) and the frequency conversion all-in-one machine (3) respectively, so as to dissipate heat of the fracturing pump (2) and the frequency conversion all-in-one machine (3).
6. A skid according to claim 5, wherein the inverter unit (3) comprises an electric motor having a casing provided with a cooling water passage and an inverter connected to the electric motor and configured to control an output power of the electric motor.
7. The skid-mounted device as set forth in claim 6, wherein the heat sink (6) comprises a fin group and a first cooling pipe and a second cooling pipe respectively penetrating through the fin group, the first cooling pipe is connected with the fracturing pump (2) to form a closed loop for conveying lubricating oil, and the second cooling pipe is connected with a cooling water channel of the variable frequency all-in-one machine (3) to form a closed loop for conveying cooling liquid.
8. A skid-mounted device as set forth in claim 6, wherein said inverter-integrated machine (3) comprises a guard box fixed to said motor, and said inverter is fixed in said guard box.
9. A skid device as set forth in claim 1, further comprising an operating box (7) fixed to said skid body frame (1), said operating box (7) having disposed thereon switches for controlling the operation of the motor and lighting in said skid device.
10. A skid according to claim 1, wherein the fracturing pump (2) and the variable frequency all-in-one machine (3) are connected by a coupling (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676753.XA CN111911123A (en) | 2020-07-14 | 2020-07-14 | Skid-mounted equipment for fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676753.XA CN111911123A (en) | 2020-07-14 | 2020-07-14 | Skid-mounted equipment for fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111911123A true CN111911123A (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010676753.XA Pending CN111911123A (en) | 2020-07-14 | 2020-07-14 | Skid-mounted equipment for fracturing |
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| Country | Link |
|---|---|
| CN (1) | CN111911123A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602322A (en) * | 2012-03-19 | 2012-07-25 | 西安邦普工业自动化有限公司 | Electrically-driven fracturing pump truck |
| US20140138079A1 (en) * | 2012-11-16 | 2014-05-22 | Us Well Services Llc | System for Pumping Hydraulic Fracturing Fluid Using Electric Pumps |
| CN105065224A (en) * | 2015-08-10 | 2015-11-18 | 三一重型能源装备有限公司 | Fracturing pump transmission system and electric fracturing pry |
| CN206903741U (en) * | 2017-07-03 | 2018-01-19 | 扬州市金阳光铸造有限公司 | A kind of engine housing for carrying circulation cooling |
| CN207999593U (en) * | 2018-03-12 | 2018-10-23 | 兰州兰石集团有限公司 | Frame-type electric drive pressure break prying body |
| CN110608030A (en) * | 2019-10-30 | 2019-12-24 | 烟台杰瑞石油装备技术有限公司 | Electric drive fracturing semitrailer of frequency conversion all-in-one machine |
-
2020
- 2020-07-14 CN CN202010676753.XA patent/CN111911123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602322A (en) * | 2012-03-19 | 2012-07-25 | 西安邦普工业自动化有限公司 | Electrically-driven fracturing pump truck |
| US20140138079A1 (en) * | 2012-11-16 | 2014-05-22 | Us Well Services Llc | System for Pumping Hydraulic Fracturing Fluid Using Electric Pumps |
| CN105065224A (en) * | 2015-08-10 | 2015-11-18 | 三一重型能源装备有限公司 | Fracturing pump transmission system and electric fracturing pry |
| CN206903741U (en) * | 2017-07-03 | 2018-01-19 | 扬州市金阳光铸造有限公司 | A kind of engine housing for carrying circulation cooling |
| CN207999593U (en) * | 2018-03-12 | 2018-10-23 | 兰州兰石集团有限公司 | Frame-type electric drive pressure break prying body |
| CN110608030A (en) * | 2019-10-30 | 2019-12-24 | 烟台杰瑞石油装备技术有限公司 | Electric drive fracturing semitrailer of frequency conversion all-in-one machine |
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Application publication date: 20201110 |