CN112127865A - Electrically driven fracturing sand mixing skid - Google Patents
Electrically driven fracturing sand mixing skid Download PDFInfo
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- CN112127865A CN112127865A CN202010831738.8A CN202010831738A CN112127865A CN 112127865 A CN112127865 A CN 112127865A CN 202010831738 A CN202010831738 A CN 202010831738A CN 112127865 A CN112127865 A CN 112127865A
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- 239000004576 sand Substances 0.000 title claims abstract description 313
- 238000002156 mixing Methods 0.000 title claims abstract description 103
- 238000003860 storage Methods 0.000 claims abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims description 61
- 238000007599 discharging Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 19
- 239000012535 impurity Substances 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000003345 natural gas Substances 0.000 abstract 1
- 239000003209 petroleum derivative Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 20
- 238000005520 cutting process Methods 0.000 description 7
- 238000005304 joining Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention relates to the drilling technology of petroleum and natural gas, in particular to an electrically driven fracturing sand mulling skid, which comprises a sand mulling device, wherein the sand mulling device is used for mixing fracturing sand and fracturing base fluid into sand-carrying fracturing fluid; the top of the sand mixing device is detachably provided with a sand storage device, and the sand storage device is used for adding fracturing sand to the sand mixing device; the sand storage device is matched with a sand conveying device, and the sand conveying device is used for conveying fracturing sand to the sand storage device; the electrically driven fracturing sand mixing sledge is driven by a motor and is matched with an electric control system; the sand mixing, storing and transporting device integrates the related devices of sand mixing, storing and transporting into a whole, and has the advantages of small occupied area, convenient transportation and simple assembly; the whole process flow automatically runs, only one operator is needed, misoperation caused by poor connection of traditional independent equipment is avoided, the protection capability on impurities and rainwater is strong, the maintenance is simple, the noise is low, the rotating speed can be quickly and effectively changed to control the sand output, the operation efficiency is greatly improved, and the labor intensity and the production cost are obviously reduced.
Description
Technical Field
The invention relates to the technical field of oil and gas drilling equipment, in particular to an electrically driven fracturing sand mixing sledge.
Background
In the oilfield fracturing operation, a sand mixing system is the heart of a fracturing system, and the advancement degree and reliability of the sand mixing system determine the construction capacity of a fracturing unit.
Traditional mulling system comprises sand jar and mulling equipment, and it has following technical defect:
1. as shown in fig. 1, the sand tank and the sand mixing device are two sets of independent devices, which are generally arranged in a T shape, and require a large floor area, are complex in assembly and wiring, and have poor adaptability to severe environments; the two sets of equipment need to be independently operated by different operators, the requirement on the connection of two procedures is high, and misoperation is easy to occur due to poor connection;
2. when the traditional sand storage device is matched with sand mixing equipment for use, 1-2 sand cutting workers need to be configured, and the fracturing sand with different meshes is manually switched by the workers to adapt to different fracturing working conditions, so that the operation efficiency is low and the response speed is slow;
3. the traditional sand mixing system is of an open steel tank structure, a sand feeding hole is designed in the tank top, and the sand mixing system needs to be manually covered after being used to prevent sundries and rainwater from invading; the protective capability is poor, sand adding interruption is easily caused by the influence of impurities and rainwater during fracturing construction, and the continuity of the fracturing construction cannot be guaranteed;
4. the sand conveying screw matched with the traditional sand mixing equipment can only add sand from one side of the mixing and stirring tank, fracturing sand is difficult to disperse in limited time, and particularly when the sand adding amount is large, the mixing and stirring effect of the fracturing sand is poor, so that the load of the discharge pump is uneven, the discharge pump is in a high-load running state for a long time, and the service life of the discharge pump is influenced;
5. during traditional mulling operation, defeated sand spiral is generally 45 angle installations with ground, and the defeated sand screw conveyer volume of slope placing is not accurate, and defeated sand spiral bottom bearing leads to the conveying capacity to weaken because of sealed inefficacy easily during fracturing construction, can't satisfy fracturing construction requirement, leads to the construction to interrupt even.
6. The traditional sand mixing system uses a diesel engine as a power source, is high in maintenance difficulty, high in noise, limited in space, complex in structure and difficult to maintain, adopts the design of a single stirring tank and a single discharge pump, is low in reliability and is difficult to adapt to the high-strength continuous construction requirement of an unconventional oil-gas multi-well platform.
Disclosure of Invention
Aiming at the technical defects of the traditional sand storage device and the sand mixing equipment, the invention provides an electrically driven fracturing sand mixing sledge; the sand tank and the sand mixing equipment are skid-mounted, automatic sand mixing and cutting are realized, and manual intervention is not needed; conveying the fracturing sand to auxiliary sand discharging nets on two sides of the top of the stirring tank through a horizontal sand adding metering device, uniformly dropping the fracturing sand into the stirring tank, and uniformly mixing the sand and having strong continuity; the invention adopts the variable frequency motor and the closed design, realizes the quick and accurate control of liquid and fracturing sand and the good protection of impurities and rainwater, and can meet the requirements of the fracturing process under complex working conditions; the invention can realize 24-hour continuous operation, has high safety, greatly reduces the labor intensity, saves at least two operators, realizes the automatic control and integrated operation of the sand mixing equipment and the sand storage device equipment, can greatly improve the efficiency and the quality of the fracturing sand mixing operation and reduce the operation cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
an electrically driven fracturing sand mulling skid comprises a sand mulling device, wherein the sand mulling device is used for mixing fracturing sand and fracturing base fluid into sand-carrying fracturing fluid; the top of the sand mixing device is detachably provided with a sand storage device, and the sand storage device is used for adding fracturing sand to the sand mixing device; the sand storage device is matched with a sand conveying device, and the sand conveying device is used for storing fracturing sand and conveying the fracturing sand to the sand storage device; the electrically driven fracturing sand mixing sledge is driven by a motor and is matched with an electric control system or is driven by the motor and hydraulic pressure in a mixed mode and is matched with an electro-hydraulic control system, and the motor and the electric control system are integrated with the sand mixing device; the sand mixing device, the sand storage device and the sand conveying device are all in modular design so as to be convenient for quick assembly, disassembly and transportation.
The sand conveying, storing and mixing device is integrated, so that the sand conveying, storing and mixing device is small in occupied area, convenient to transport and simple to assemble; the whole process flow automatically runs, only one operator is needed to control the opening and closing of the automatic switch valve, and no sand cutting worker or joining procedure is needed to be arranged, so that the misoperation of traditional independent equipment due to poor joining is avoided, the automatic control can be realized, the operation efficiency is greatly improved, and the labor intensity and the production cost are obviously reduced;
the sand mixing device is of an integrated closed structure, has strong protection capability on impurities and rainwater, avoids the technical defect that sand adding is interrupted due to the influence of the impurities and the rainwater on the traditional sand mixing device, and provides technical support for continuous high-strength fracturing construction;
the invention takes the motor as a power source, has simple maintenance and low noise, can accurately control the sand adding amount, the liquid discharging amount and the output pressure of the fracturing sand when the variable frequency motor is used, and can meet the requirements of the fracturing process under complex working conditions; the invention can also use a motor and hydraulic hybrid drive and be matched with an electro-hydraulic control system for control.
As a preferable scheme of the invention, the sand mulling device comprises a mixing and stirring tank, an automatic switch valve connected to the top of the mixing and stirring tank, and a suction manifold and a discharge manifold connected to the bottom of the mixing and stirring tank; the automatic switch valve is used for connecting the sand storage device and adding fracturing sand into the mixing and stirring tank; the mixing and stirring tank is matched with a stirrer, an auxiliary sand discharging net and/or a sand adding metering device and/or a liquid level meter and an additive adding device, and is used for improving the stirring quality of the sand-carrying fracturing fluid; the suction manifold is matched with a suction pump, and the discharge manifold is matched with a discharge pump;
at least one sand bin is arranged in the sand storage device to meet the requirements of different working conditions on fracturing sand with different meshes;
the sand conveying device comprises a hopper and a conveyor, and the conveyor is used for conveying the fracturing sand in the hopper to the sand storage device.
When the fracturing operation is carried out, the sand conveying vehicle or a sand conveying worker only needs to put fracturing sand into the hopper of the sand conveying device on the ground, when a crane is used for loading the sand, the sand unloading at a low position on the ground is beneficial to the operation of the crane and the sand conveying worker, the hoisting visual field is good, the high-altitude operation and hoisting risk are avoided, and the safety and the efficiency are improved; after the fracturing sand is placed, the conveyer conveys the fracturing sand in the hopper upwards to the top of the sand storage device and adds the fracturing sand into the sand bins corresponding to the sand storage device according to the mesh number of the fracturing sand;
after the preparation of the fracturing sand is finished, a sand mixing operator opens automatic switch valves corresponding to different sand bins according to working conditions, the corresponding fracturing sand flows downwards, and enters a mixing and stirring tank after being filtered and dispersed by a sand adding metering device and an auxiliary sand discharging net;
meanwhile, injecting the fracturing base fluid into the mixing and stirring tank through a suction manifold by a suction pump, and fully stirring the fracturing base fluid and fracturing sand by a stirrer to obtain sand-carrying fracturing fluid; at the moment, the discharge pump pumps out the uniformly stirred sand-carrying fracturing fluid through a discharge manifold and conveys the sand-carrying fracturing fluid to a fracturing pump, and the sand-carrying fracturing fluid is injected into the bottom of the well by the fracturing pump;
store up the sand setting at the mixing agitator tank top, fracturing sand is through adding sand metering device, and the sand screen evenly falls into the agitator tank under the supplementary along agitator tank top both sides, and fracturing sand distribution is even and can the fast dispersion, even add the big also can guarantee the stirring effect of sand volume, has avoided pumping the sky scheduling problem because of the fracturing pump that the stifled sand of well head arouses, guarantees the life and the fracturing construction quality of discharge pump.
As a preferable scheme of the invention, the automatic switch valve is an electric or pneumatic or hydraulic knife gate valve.
The knife gate valve has simple and reliable structure and lower cost, the comprehensive performance of the knife gate valve can meet the requirements of the fracturing process, knife gate valves with different driving modes can be selected according to actual conditions, and other valves capable of realizing automatic opening and closing functions can be used.
As a preferable scheme of the invention, the automatic switch valve is arranged at the top of the spiral feeding port of the mixing and stirring tank so as to improve the uniformity of adding the fracturing sand.
Automatic switch valve sets up at the spiral pan feeding mouth top of mixing agitator tank, arranges in storing up sand device bottom both sides, can conveniently provide fracturing sand among the sand device with storing up with sand metering device, need not to be equipped with and cuts the sand worker or link up the process, can realize automatic control, further improves the homogeneity and the stability that add the sand stirring.
As a preferable scheme of the invention, the discharge manifolds are arranged on two sides of the bottom of the mixing and stirring tank so as to improve the reliability of the invention and adapt to multi-platform large-scale high-strength fracturing construction.
The discharge pumps are arranged at two sides of the bottom of the mixing and stirring tank, so that the integral arrangement of the mixing and stirring tank is optimized, and the structural strength is more stable; therefore, the reliability of the equipment is improved, the fracturing construction of a multi-well platform in a large scale and high strength is adapted, and the shutdown caused by pump repair is avoided during the construction.
As a preferable scheme of the invention, the sand adding metering device is a sand conveying spiral or belt metering scale.
The sand conveying screw and the belt scale are common fracturing sand metering equipment, the structure is simple and reliable, and the speed requirement and the precision requirement of a fracturing process can be met; other forms of sand adding metering devices can be selected according to actual conditions.
As the preferable scheme of the invention, four sand bins are arranged in the sand storage device.
The more sand bins are, the more kinds of fracturing sand can be stored, but the more sand bins are, the smaller the corresponding volume of each sand bin is; in order to ensure the continuity of the fracturing operation implemented by the invention, the storage capacity of the fracturing sand with main meshes must be ensured, so each sand silo must reach a certain volume; through actual field tests, four sand bins arranged in the sand storage device have a wider application range; different quantities of sand bins can be arranged according to actual conditions.
In a preferred embodiment of the present invention, the conveyor is a screw conveyor or a pipe chain conveyor or a rib belt conveyor or a pneumatic conveyor or a bucket elevator.
The spiral conveyor, the pipe chain conveyor, the flange belt conveyor, the pneumatic conveyor and the bucket elevator are all common fracturing sand conveying equipment, and the speed requirement and the precision requirement of a fracturing process can be met through field tests; other forms of conveyors may be used as the case may be.
As a preferable scheme of the invention, the motor is a variable-frequency integrated motor.
The variable-frequency integrated motor is small in size, the assembly space of the variable-frequency integrated motor is effectively saved, the maintenance is simple, and the noise is low; the frequency conversion integrated motor is matched with the electric control system, so that the rotating speed can be quickly and effectively changed to control the sand output, and the fracturing process requirement under the complex working condition can be met.
The invention has the beneficial effects that:
1. the sand conveying, storing and mixing device is integrated, so that the sand conveying, storing and mixing device is small in occupied area, convenient to transport and simple to assemble; the whole process flow automatically runs, only one operator is needed to control the opening and closing of the automatic switch valve, and no sand cutting worker or joining procedure is needed to be arranged, so that the misoperation of traditional independent equipment due to poor joining is avoided, the automatic control can be realized, the operation efficiency is greatly improved, and the labor intensity and the production cost are obviously reduced;
2. the sand mixing device is of an integrated closed structure, has strong protection capability on impurities and rainwater, avoids the technical defect that sand adding is interrupted due to the influence of the impurities and the rainwater on the traditional sand mixing device, and provides technical support for continuous high-strength fracturing construction;
3. the sand storage device is arranged at the top of the mixing and stirring tank, fracturing sand flows into the mixing and stirring tank from the auxiliary sand discharging nets on the two sides of the top of the mixing and stirring tank through the sand adding metering device, the auxiliary sand discharging net is twice as large in area as the traditional stirring tank, so that the fracturing sand is uniformly distributed and can be rapidly dispersed, the large-area sand discharging net can reduce the fluctuation of the liquid level of the stirring tank caused by centralized sand adding, the stirring effect is favorably improved, the pressure fluctuation of a discharge pump caused by nonuniform stirring can be avoided, the continuous and stable liquid supply of the fracturing pump can be ensured, the service lives of the discharge pump and a power device are prolonged, the suction phenomenon of the fracturing pump is avoided, and the safety and the stability of fracturing operation are improved;
4. the invention takes the motor as a power source, has simple maintenance and low noise, reduces redundant design, quickly and accurately controls the sand adding amount, the discharge capacity and the stable pressure, and is suitable for the fracturing construction requirement of a multi-well platform under high-strength complex working conditions.
Description of the drawings:
fig. 1 is a layout view of a conventional sand mulling apparatus.
Fig. 2 is a schematic structural diagram of an electrically driven fracturing sand mixing skid of the present invention.
Fig. 3 is a schematic structural diagram of an electrically driven fracturing sand mixing skid of the present invention.
Fig. 4 is a schematic structural view of the sand mulling apparatus.
Fig. 5 is a schematic structural view of the sand mulling device after hiding the structures of the balustrade and the shell.
Fig. 6 is an enlarged view of the structure at a in fig. 5.
Wherein the reference numerals are:
1-a sand mixing device, 11-an automatic switch valve, 12-a mixing and stirring tank, 121-a stirrer, 122-an auxiliary sand discharging net, 123-a sand adding metering device, 124-a liquid level meter, 125-an additive adding device, 126-a spiral feeding port, 13-a suction manifold, 131-a suction pump, 14-a discharge manifold, 141-a discharge pump, 2-a sand storage device, 21-a sand bin, 3-a sand conveying device, 31-a hopper, 32-a conveyor, 4-a motor and 5-an electric control system.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
In order to show the structure of the invention more clearly, parts of the railing and housing structure are hidden in the drawings.
As shown in fig. 2-3, an electrically driven fracturing sand mulling skid comprises a sand mulling device 1, wherein the sand mulling device 1 is used for mixing fracturing sand and fracturing base fluid into sand-carrying fracturing fluid; the top of the sand mixing device 1 is detachably provided with a sand storage device 2, and the sand storage device 2 is used for storing fracturing sand and adding the fracturing sand to the sand mixing device 1; the sand storage device 2 is matched with a sand conveying device 3, and the sand conveying device 3 is used for conveying fracturing sand to the sand storage device 2; the sand mixing device is driven by a motor 4 and is matched with an electric control system 5, and the motor 4 and the electric control system 5 are integrated with the sand mixing device 1; the sand mixing device 1, the sand storage device 2 and the sand conveying device 3 are all in modular design so as to be convenient to rapidly disassemble, assemble and transport;
four sand bins are arranged in the sand storage device 2 to meet the requirements of different working conditions on fracturing sand with different meshes; the sand conveying device 3 comprises a hopper 31 and a conveyor 32, and the conveyor 32 is used for conveying the fracturing sand in the hopper 31 to the sand storage device 2; the conveyor 32 is a screw conveyor;
as shown in fig. 4 to 6 in conjunction with fig. 2 to 3, in the present embodiment, the sand mulling apparatus 1 includes a mixing and stirring tank 12, an automatic opening and closing valve 11 connected to the top of the mixing and stirring tank 12, a suction manifold 13 and a discharge manifold 14 connected to the bottom of the mixing and stirring tank 12; the automatic switch valve 11 is used for connecting the sand storage device 2 and adding fracturing sand into the mixing and stirring tank 12; the mixing and stirring tank 12 is matched with a stirrer 121, an auxiliary sand discharging net 122, a sand adding metering device 123, a liquid level meter 124 and an additive adding device 125, and is used for improving the stirring quality of the sand-carrying fracturing fluid; the suction manifold 13 and the discharge manifold 14 are respectively provided with a suction pump 131 and a discharge pump 141; the motor 4 is a variable-frequency integrated motor;
the automatic switch valve 11 is a hydraulic knife gate valve and is arranged at the top of the spiral feeding port 126 of the mixing and stirring tank 12, a sand cutting tool or a connecting process is not required to be equipped, automatic control can be realized, and the uniformity of adding fracturing sand is improved;
the discharge manifolds 14 are arranged at two sides of the bottom of the mixing and stirring tank 12, so that the reliability of the invention is improved and the invention is suitable for multi-platform large-scale high-strength fracturing construction; the sand-adding metering device 125 is a sand conveying screw.
When the fracturing operation is carried out, the sand conveying vehicle or a sand conveying worker only needs to put fracturing sand into the hopper 31 of the sand conveying device 3 on the ground, when a crane is used for loading the sand, the sand unloading at a low position on the ground is beneficial to the operation of the crane and the sand conveying worker, the hoisting visual field is good, the high-altitude operation and hoisting risk are avoided, and the safety and the efficiency are improved; after the fracturing sand is placed, the conveyer 32 conveys the fracturing sand in the hopper 31 upwards to the top of the sand storage device 2, and the fracturing sand is added into a sand bin corresponding to the sand storage device 2 according to the mesh number of the fracturing sand;
after the preparation of the fracturing sand is finished, a sand mixing operator opens the automatic switch valves 11 corresponding to different sand bins 21 according to working conditions, the corresponding fracturing sand flows downwards, and enters the mixing and stirring tank 12 after being filtered and dispersed by the sand adding metering device 123 and the auxiliary lower sand screen 122, and in the process, the operator controls the automatic switch valves 11 to be opened and closed according to the feedback of the sand adding metering device 123 and the liquid level meter 124 so as to accurately control the sand adding type and the sand adding amount;
meanwhile, the suction pump 131 injects the fracturing base fluid into the mixing and stirring tank 12 through the suction manifold 13, and the stirrer 121 fully stirs the fracturing base fluid and the fracturing sand to obtain the sand-carrying fracturing fluid; at this time, the discharge pump 141 pumps out the uniformly stirred sand-carrying fracturing fluid through the discharge manifold 14 and conveys the sand-carrying fracturing fluid to the fracturing pump, and the sand-carrying fracturing fluid is injected into the bottom of the well by the fracturing pump;
the sand storage device 2 is arranged at the top of the mixing and stirring tank 12, fracturing sand passes through the sand adding metering device 123, and uniformly falls into the stirring tank along the auxiliary sand discharging nets 122 on two sides of the top of the mixing and stirring tank 12, the fracturing sand is uniformly distributed and can be rapidly dispersed, the stirring effect can be ensured even if the sand adding amount is large, the problems of pumping emptying of the fracturing pump and the like caused by sand blockage of a wellhead are avoided, and the service life of the discharge pump 141 and the fracturing construction quality are ensured;
the knife gate valve has simple and reliable structure and lower cost, the comprehensive performance of the knife gate valve can meet the requirements of the fracturing process, knife gate valves with different driving modes can be selected according to actual conditions, and other valves capable of realizing automatic opening and closing functions can be used;
the automatic switch valve 11 is arranged at the top of the spiral feeding port 126 of the mixing and stirring tank 12 and arranged at two sides of the bottom of the sand storage device 2, so that fracturing sand in the sand storage device 2 can be conveniently supplied to the sand adding metering device 123, a sand cutting tool or a connecting process is not required to be equipped, automatic control can be realized, and the uniformity and the stability of sand adding stirring are further improved;
the discharge pumps 141 are arranged at the two sides of the bottom of the mixing and stirring tank 12, so that the integral arrangement of the mixing and stirring tank is optimized, and the structural strength is more stable; therefore, the reliability of the equipment is improved, the equipment is suitable for large-scale high-strength fracturing construction of a multi-well platform, and the shutdown caused by pump repair is avoided during the construction period;
the sand conveying screw is common fracturing sand metering equipment, has a simple and reliable structure, and can meet the speed requirement and the precision requirement of a fracturing process; other forms of sand adding metering devices can be selected according to actual conditions;
the more the sand bins 21 are, the more kinds of fracturing sand can be stored, but the more the sand bins 21 are, the smaller the corresponding volume of each sand bin 21 is; in order to ensure the continuity of the fracturing operation implemented by the invention, the storage capacity of the fracturing sand with main meshes must be ensured, so each sand silo 21 must reach a certain volume; through actual field tests, the four sand bins 21 arranged in the sand storage device 2 have a wide application range; different numbers of sand bins 21 can be arranged according to actual conditions;
the spiral conveyor, the pipe chain conveyor, the flange belt conveyor, the pneumatic conveyor and the bucket elevator are all common fracturing sand conveying equipment, and the speed requirement and the precision requirement of a fracturing process can be met through field tests; other forms of conveyors can be selected according to actual conditions;
the variable-frequency integrated motor is small in size, the assembly space of the variable-frequency integrated motor is effectively saved, the maintenance is simple, and the noise is low; the frequency conversion integrated motor is matched with the electric control system, so that the rotating speed can be quickly and effectively changed to control the sand output, and the fracturing process requirement under the complex working condition can be met.
The sand conveying, storing and mixing device is integrated, so that the sand conveying, storing and mixing device is small in occupied area, convenient to transport and simple to assemble; the whole process flow automatically runs, only one operator is needed to control the opening and closing of the automatic switch valve, and no sand cutting worker or joining procedure is needed, so that misoperation caused by poor joining of traditional independent equipment is avoided, the operation efficiency is greatly improved, and the labor intensity and the production cost are obviously reduced;
the sand mixing device is of an integrated closed structure, has strong protection capability on impurities and rainwater, avoids the technical defect that sand adding is interrupted due to the influence of the impurities and the rainwater on the traditional sand mixing device, and provides technical support for continuous high-strength fracturing construction;
the sand storage device 2 is arranged at the top of the mixing and stirring tank 12, fracturing sand flows into the mixing and stirring tank 12 from the auxiliary sand discharging nets 122 on the two sides of the top of the mixing and stirring tank 12 through the sand adding metering device 123, the area of the auxiliary sand discharging nets 122 is twice that of the traditional stirring tank, so that the fracturing sand is uniformly distributed and can be rapidly dispersed, the large-area sand discharging nets can reduce the fluctuation of the liquid level of the stirring tank caused by centralized sand adding, the stirring effect is favorably improved, the pressure fluctuation of a discharge pump caused by nonuniform stirring can be avoided, the continuous and stable liquid supply of the fracturing pump can be ensured, the service lives of the discharge pump and a power device are prolonged, the suction phenomenon of the fracturing pump is avoided, and the safety and the stability of fracturing operation are improved;
the invention takes the motor 4 as a power source, has simple maintenance and low noise, reduces redundant design, quickly and accurately controls the sand adding amount, the discharge capacity and the stable pressure, and is suitable for the fracturing construction requirement of a multi-well platform under high-strength complex working conditions.
All of the features disclosed above, or all of the steps in any method or process disclosed, may be combined in any combination, except features and/or steps that are mutually exclusive.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The electrically driven fracturing sand mulling skid is characterized by comprising a sand mulling device (1), wherein the sand mulling device (1) is used for mixing fracturing sand and fracturing base fluid into sand-carrying fracturing fluid; the top of the sand mixing device (1) is detachably provided with a sand storage device (2), and the sand storage device (2) is used for storing fracturing sand and adding the fracturing sand to the sand mixing device (1); the sand storage device (2) is matched with a sand conveying device (3), and the sand conveying device (3) is used for conveying fracturing sand to the sand storage device (2); the electrically driven fracturing sand mixing sledge is driven by a motor (4) and is matched with an electric control system (5) or is driven by a motor and hydraulic pressure in a mixed mode and is matched with an electric hydraulic control system, and the motor (4) and the electric control system (5) are integrated with the sand mixing device (1); the sand mixing device (1), the sand storage device (2) and the sand conveying device (3) are all in modular design, so that the sand mixing device can be rapidly disassembled and transported.
2. An electrically driven fracturing blender skid according to claim 1, wherein the blender device (1) comprises a mixing and stirring tank (12), an automatic on-off valve (11) connected to the top of the mixing and stirring tank (12), a suction manifold (13) and a discharge manifold (14) connected to the bottom of the mixing and stirring tank (12); the automatic switch valve (11) is used for connecting the sand storage device (2) and adding fracturing sand into the mixing and stirring tank (12); the mixing and stirring tank (12) is matched with a stirrer (121), an auxiliary sand discharging net (122) and/or a sand adding metering device (123) and/or a liquid level meter (124) and an additive adding device (125) and is used for improving the stirring quality of the sand-carrying fracturing fluid; the suction manifold (13) is matched with a suction pump (131), and the discharge manifold (14) is matched with a discharge pump (141);
at least one sand bin (21) is arranged in the sand storage device (2) to match the requirements of different working conditions on fracturing sand with different meshes;
the sand conveying device (3) comprises a hopper (31) and a conveyor (32), wherein the conveyor (32) is used for conveying the fracturing sand in the hopper (31) to the sand storage device (2).
3. An electrically driven frac skid according to claim 2 wherein said automatic on/off valve (11) is an electric or pneumatic or hydraulic knife gate valve.
4. An electrically driven frac skid as claimed in claim 2 wherein said automatic on/off valve (11) is arranged on top of the screw inlet (126) of the mixing drum (12).
5. An electrically driven frac skid as claimed in claim 2 wherein said discharge manifolds (14) are arranged on both sides of the bottom of the mixing and stirring tank (12) to improve the reliability and stability of the discharged fracturing fluid.
6. An electrically driven frac skid as claimed in claim 2 wherein said sand dosing means (123) is a sand screw or belt scale.
7. An electrically driven frac skid according to claim 1, wherein four sand magazines (21) are provided in the sand storage means (2).
8. An electrically driven frac skid according to claim 1 wherein the sand transport means (3) is a screw conveyor or a pipe chain conveyor or a flange belt conveyor or a pneumatic conveyor or a bucket elevator.
9. An electrically driven frac skid according to any of claims 1-8 wherein said motor (4) is a variable frequency integral motor.
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| CN202010831738.8A CN112127865A (en) | 2020-08-18 | 2020-08-18 | Electrically driven fracturing sand mixing skid |
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| CN202010831738.8A CN112127865A (en) | 2020-08-18 | 2020-08-18 | Electrically driven fracturing sand mixing skid |
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| CN113882843A (en) * | 2021-09-24 | 2022-01-04 | 盐城旭东机械有限公司 | Automatic hydraulic control fracturing manifold |
| CN113926370A (en) * | 2021-07-29 | 2022-01-14 | 四川宏华电气有限责任公司 | Distributed liquid supply sand mixing sledge |
| CN114658405A (en) * | 2022-04-07 | 2022-06-24 | 烟台杰瑞石油装备技术有限公司 | Fracturing equipment |
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Application publication date: 20201225 |