CN105080412B - The automatic continuous blending device of fracturing fluid - Google Patents
The automatic continuous blending device of fracturing fluid Download PDFInfo
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- CN105080412B CN105080412B CN201410218995.9A CN201410218995A CN105080412B CN 105080412 B CN105080412 B CN 105080412B CN 201410218995 A CN201410218995 A CN 201410218995A CN 105080412 B CN105080412 B CN 105080412B
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Abstract
The invention discloses a kind of fracturing fluid continuous mixing device, it includes：Rubber powder metering units；Salt fines metering units；Rubber powder automatic charging unit；Salt fines automatic charging unit；Liquid additive feed unit；Clear water feed unit；Water powdery mixer；Brine mixer, is connected with salt fines metering units and clear water feed unit respectively；Flow mixer, is connected with Water powdery mixer, brine mixer and liquid additive feed unit respectively；Control unit, is at least connected with rubber powder metering units, salt fines metering units, clear water feed unit and liquid additive feed unit, for reading the flow of rubber powder in rubber powder metering units so as to flow when controlling the clear water feed unit to supply water Water powdery mixer；For reading the flows of salt fines in salt fines metering units so as to flow when controlling the clear water feed unit to supply water brine mixer；Control the flow of various liquid additives in liquid additive feed unit.
Description
Technical Field
The invention belongs to the technical field of a liquid preparation process for fracturing construction of an oil and gas field, and particularly relates to a novel automatic continuous mixing device for fracturing liquid.
Background
In oil exploitation, in order to prolong the exploitation life of an oil field and improve the extraction rate of oil in an oil reservoir, an oil fracturing technology is generally adopted, that is, a hydraulic fracturing technology is one of the most important yield increasing measures for improving the productivity and the recovery rate of an oil-gas well, and in the hydraulic fracturing technology, the quality of the mixing performance of a fracturing fluid is directly related to the success or failure of fracturing construction and important factors influencing the yield increasing effect after fracturing. The main components of the fracturing fluid comprise plant rubber powder, water, potassium chloride crystal powder, various liquid chemical additives such as a clay stabilizer and a cleanup additive, and the components are prepared into liquid with certain viscosity, wherein the uniform mixing degree and the final viscosity of various materials are evaluation means for the blending quality of the fracturing fluid.
The traditional fracturing fluid mixing method is an intermittent fluid mixing method, namely, a pool of water or a tank of water is utilized, the required addition amount of each material is weighed by manual calculation, then potassium chloride powder is added into the pool or the tank according to the proportion, after long-time stirring and circulating dissolution, plant rubber powder and other liquid additives are added, and after mechanical stirring and circulating hydration for 2-3 hours, the prepared fracturing fluid is obtained. However, the fracturing fluid prepared by the manual intermittent fluid preparation method has poor quality, serious powder in water, uneven viscosity, intermittent operation and long mixing time, can only be mixed in batches, and the fracturing operation cannot be continuously carried out. With the improvement of the requirement of the oil field construction efficiency and the development of large-scale fracturing, the traditional liquid distribution mode can not meet the requirement of fracturing operation in terms of quality or supply quantity.
The continuous blending device for different fracturing fluids is developed by large oil and gas service companies such as Baker Hughes, Halliburton, Schlumberger and the like abroad aiming at the fracturing operation characteristics of regions such as North America and the like. However, the method adopts a concentrated solution mixing mode, namely, specific plant rubber powder is mixed with an organic solvent to obtain a rubber powder concentrated solution, and then the concentrated solution is mixed with water and other various liquid additives. The mixing mode needs not only special rubber powder, but also a large amount of organic solvent, and is not suitable for fracturing operation in China. The domestic design of the continuous blending device for the fracturing fluid can realize the direct mixing of specific plant rubber powder and water by utilizing the high-efficiency jet device, and then other various chemical additives are added to obtain a continuous fracturing fluid product. However, the mixing mode limits the application range of rubber powder, has small liquid preparation amount and cannot be directly used in the continuous fracturing operation process.
Through the analysis, the continuous liquid preparation device and the method which can meet the requirements of various rubber powder additions and continuous fracturing operations are needed to be designed for oil field fracturing construction.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a continuous fracturing fluid blending device and a method, the device and the method can be suitable for blending all types of plant rubber powder, potassium chloride and other various liquid additives can be simultaneously added, the prepared fracturing fluid has high quality, and the requirements of continuous fracturing operation can be met.
In order to achieve the purpose, the invention adopts the following technical scheme:
a continuous blending assembly for fracturing fluid, comprising:
the rubber powder metering unit is used for quantitatively feeding the plant rubber powder;
the salt powder metering unit is used for quantitatively feeding salt powder;
the rubber powder automatic feeding unit is connected with the rubber powder metering unit so as to automatically feed materials to the rubber powder metering unit;
the automatic salt powder feeding unit is connected with the salt powder metering unit so as to automatically feed materials to the salt powder metering unit;
a liquid additive supply unit for quantitatively supplying various liquid additives;
the clear water supply unit is used for quantitatively supplying clear water mixed with the plant rubber powder and quantitatively supplying clear water mixed with the salt powder;
the water-powder mixer is respectively connected with the rubber powder metering unit and the clear water supply unit and is used for receiving the vegetable rubber powder from the rubber powder metering unit and the clear water from the clear water supply unit and fully mixing the vegetable rubber powder and the clear water to obtain a concentrated vegetable rubber powder solution;
the brine mixer is respectively connected with the salt powder metering unit and the clear water supply unit and is used for receiving the salt powder from the salt powder metering unit and the clear water from the clear water supply unit and fully mixing the salt powder and the clear water to obtain a potassium chloride concentrated solution;
the fluid mixer is respectively connected with the water powder mixer, the brine mixer and the liquid additive supply unit and is used for simultaneously receiving the plant gum powder concentrated solution from the water powder mixer, the potassium chloride concentrated solution from the brine mixer and various liquid additives from the liquid additive supply unit and fully mixing the plant gum powder concentrated solution, the potassium chloride concentrated solution from the brine mixer and the various liquid additives to obtain fracturing fluid;
the control unit is at least connected with the rubber powder metering unit, the salt powder metering unit, the clear water supply unit and the liquid additive supply unit and is used for reading the flow of the rubber powder in the rubber powder metering unit so as to control the flow of the clear water supply unit when supplying water to the water-powder mixer; the device is used for reading the flow of the salt powder in the salt powder metering unit so as to control the flow of the clear water supply unit when supplying water to the salt water mixer; the flow rates of the various liquid additives in the liquid additive supply unit are controlled.
In the above continuous fracturing fluid mixing device, as a preferred embodiment, the mixing device further includes: the automatic liquid sending unit is connected with the outlet of the fluid mixer; and a liquid level monitor is arranged in the fluid mixer, and the automatic liquid sending unit can automatically control the liquid sending amount of the fracturing liquid according to the liquid level of the fluid mixer.
In the continuous fracturing fluid mixing device, as a preferred embodiment, the rubber powder metering unit, the salt powder metering unit, the rubber powder automatic feeding unit, the salt powder automatic feeding unit, the liquid additive supply unit, the clear water supply unit, the water powder mixer, the brine mixer, the fluid mixer and the control unit are mounted on at least one transport vehicle. More preferably, the transport vehicle is a flatbed semi-trailer.
In the above continuous fracturing fluid mixing device, as a preferred embodiment, the automatic rubber powder feeding unit and the automatic salt powder feeding unit have the same first structure or second structure, and the first structure includes: the conveying belt is used for conveying bagged dry powder materials; the bag breaking machine is positioned at one end of the conveyor belt and used for breaking the bag body containing the dry powder material and separating the dry powder material from the bag body; the pneumatic conveyor is arranged at the outlet of the bag breaking machine and used for pneumatically conveying the dry powder material; conveying hose, one end connect in pneumatic conveyor's export, the other end is connected in rubber powder metering unit or salt powder metering unit for output dry powder material, the second structure includes: the conveying belt is used for conveying bagged dry powder materials; the bag breaking machine is positioned at one end of the conveyor belt and used for breaking the bag body containing the dry powder material and separating the dry powder material from the bag body; one end of the conveying hose is connected with the outlet of the bag breaking machine, the other end of the conveying hose is connected with the rubber powder metering unit or the salt powder metering unit, and the conveying of the dry powder material is completed by means of the self gravity of the dry powder material.
In the above continuous fracturing fluid mixing device, as a preferred embodiment, the rubber powder metering unit has a third structure or a fourth structure, and the third structure includes: the rubber powder storage tank is connected with the outlet of the rubber powder automatic feeding unit and is used for receiving and storing rubber powder; one end of the rubber powder spiral feeder is arranged at the outlet of the rubber powder storage tank and is used for conveying rubber powder to the water-powder mixer; and the rubber powder meter is arranged at the bottom of the rubber powder spiral feeder and connected with the control unit, and is used for measuring the blanking amount of rubber powder in real time, and the fourth structure comprises: the inlet of the rubber powder storage tank is connected with the outlet of the rubber powder automatic feeding unit, and the outlet of the rubber powder storage tank is connected with the water powder mixer through a rubber powder pipeline and used for receiving and storing rubber powder and conveying the rubber powder to the water powder mixer through the action of gravity; the rubber powder measurement system set up in on the rubber powder storage tank, the rubber powder measurement system includes: the rubber powder level switch is arranged on the tank body of the rubber powder storage tank and used for detecting the quantity of rubber powder in the rubber powder storage tank so as to control the feeding quantity of the rubber powder automatic feeding unit through the control unit; the rubber powder flow regulating valve is arranged at the outlet of the rubber powder storage tank and is used for controlling the output speed of rubber powder; the rubber powder meter is connected with the material level switch and the rubber powder flow regulating valve and is used for regulating the opening degree of the rubber powder flow regulating valve according to the requirement; the control unit adjusts the rubber powder flow regulating valve according to the feedback results of the rubber powder level switch and the rubber powder meter.
In the above continuous fracturing fluid mixing device, as a preferred embodiment, the salt powder metering unit has a fifth structure or a sixth structure, and the fifth structure includes: the salt powder storage tank is connected with the outlet of the salt powder automatic feeding unit and is used for receiving and storing salt powder; one end of the salt powder spiral feeder is arranged at the outlet of the salt powder storage tank and used for conveying salt powder to the salt water mixer; and the salt powder meter, set up in the bottom of salt powder spiral feeder is connected with the control unit for measure the blanking volume of salt powder in real time, the sixth structure includes: the inlet of the salt powder storage tank is connected with the outlet of the salt powder automatic feeding unit, and the outlet of the salt powder storage tank is connected with the salt water mixer through a salt powder pipeline and used for receiving and storing salt powder and conveying the salt powder to the salt water mixer through the action of gravity; salt powder measurement system set up in on the salt powder storage tank, salt powder measurement system includes: the salt powder level switch is arranged on the tank body of the salt powder storage tank and used for detecting the amount of salt powder in the salt powder storage tank so as to control the feeding amount of the automatic salt powder feeding unit through the control unit; the salt powder flow regulating valve is arranged at the outlet of the salt powder storage tank and used for controlling the output speed of the salt powder; the salt powder meter is connected with the material level switch and the salt powder flow regulating valve and is used for regulating the opening degree of the salt powder flow regulating valve according to the requirement; and the control unit adjusts the salt powder flow regulating valve according to the salt powder level switch and the feedback result of the salt powder meter.
In the above continuous fracturing fluid mixing apparatus, as a preferred embodiment, the liquid additive supply unit includes: n pneumatic pumps, N buffer tanks and N self-priming pumps; the N pneumatic pumps are used for conveying N liquid additives to respective buffer tanks; the N buffer tanks are used for temporarily storing N liquid additives; the N self-sucking pumps are respectively used for pumping N liquid additives in the N buffer tanks into the fluid mixer; wherein N is an integer of 1 or more.
In the above continuous fracturing fluid mixing apparatus, as a preferred embodiment, the clean water supply unit includes: the first water pump is used for supplying water to the water-powder mixer; the first flowmeter is used for monitoring the flow of the water supplied by the first water pump and is connected with the control unit; the control unit controls the flow of the first water pump through the first flow regulating valve according to feedback results of the rubber powder metering unit and the first flow meter; a second water pump for supplying water to the brine mixer; the second flowmeter is used for monitoring the flow of the water supplied by the second water pump and is connected with the control unit; and the control unit controls the flow of the second water pump through the second flow regulating valve according to the feedback results of the salt powder metering unit and the second flow meter.
In the above continuous fracturing fluid mixing device, as a preferred embodiment, the control unit is a PLC (programmable logic controller), and the control unit further controls the flow rates of the solutions supplied to the fluid mixer by the water powder mixer and the brine mixer.
In the above continuous fracturing fluid mixing device, the fluid mixer may be a conventional fluid mixer in the art, and as a preferred embodiment, the fluid mixer includes: the tank body is internally provided with a cavity; the separation plates are arranged in the cavity in the tank body in parallel and vertically, the height of each separation plate is smaller than the internal height of the cavity, the upper ends and the lower ends of the adjacent separation plates are respectively fixed on the upper wall and the lower wall of the cavity, and a liquid channel is formed between the free ends of the separation plates and the upper wall or the lower wall of the cavity and between the adjacent separation plates.
In the above continuous fracturing fluid mixing and dispensing device, preferably, the fluid mixer further includes: and one end of each baffle is fixed on the side surface of the corresponding partition, the other end of each baffle inclines downwards and keeps a distance with the other adjacent partition, and the baffles are arranged in a liquid channel through which fluid flows from top to bottom. More preferably, a through hole communicating with the outside of the tank is provided at the bottom of the fluid mixer to avoid liquid remaining inside the tank or for cleaning the tank.
Compared with the prior art, the invention has the following beneficial effects:
(1) the realization of the same-vehicle addition of potassium chloride solves the problem that the prior intermittent liquid preparation method for preparing the potassium chloride solution firstly breaks through the current situation that the potassium chloride cannot be added by the existing equipment.
(2) The design of the high-efficiency fluid mixer is suitable for all types of dry powder solutions such as raw powder, modified powder, instant powder and other various types of dry powder, has wide application range, breaks through the use limit of rubber powder, can prepare large-flow fracturing fluid and realizes continuous fracturing operation.
(3) The preparation of the concentrated solution of the rubber powder and the concentrated solution of the KCl and the simultaneous addition of the liquid chemical additive in the same vehicle realize qualitative breakthrough in the mixing method, and the mixing method is suitable for various materials, thereby greatly reducing the cost of the fracturing operation.
(4) The automatic bag breaking and feeding system not only reduces the labor intensity of workers, but also realizes the full-sealing design and protects the surrounding environment of the fracturing operation site.
The continuous fracturing fluid blending device is used as important ground corollary equipment for fracturing construction, and has important functions and wide application prospects. The realization of dry powder, namely the feeding of the plant rubber powder, the feeding of various additives in the same vehicle and the high-efficiency mixing technology saves the fracturing time and cost; the fracturing fluid is prepared continuously and completely in large flow, so that the quality level of fracturing operation is improved; the skid-mounted integral layout meets the requirements of field operation working conditions, is particularly suitable for areas with inconvenient transportation and uneven terrain, and has wide application range. The continuously prepared fracturing fluid has no 'powder in water' phenomenon, the viscosity of the solution rises quickly, the mixing is uniform, and the quality of the fracturing fluid is high.
Drawings
FIG. 1 is a schematic diagram of a fracturing fluid continuous compounding assembly of an embodiment of the present invention;
fig. 2 is a schematic view of the structure of the fluid mixer of the present invention.
Wherein the reference numerals are as follows: 1-a control unit; 2-a brine mixer; 3-a water-powder mixer; 4-a fluid mixer; 4-a fluid mixer; a tank body-41; 42-mixer inlet; 43-mixer outlet; a separator-44; a baffle-45; 401 — gaps between adjacent separator plates; 402-an opening; 403-a via hole; 5-automatic hair liquid unit; 6-automatic salt powder feeding unit; 7-rubber powder automatic feeding unit; 81-a salt powder storage tank; 82-salt powder level switch; 83-salt powder meter; 84-a salt powder flow regulating valve; 91-rubber powder storage tank; 92-rubber powder level switch; 93-a rubber powder meter; 94-rubber powder flow regulating valve; 101-a second water pump; 102-a first water pump; 103-a second flow meter; 104-a second flow regulating valve; 105-a first flow meter; 106-first flow regulating valve; 111-a pneumatic pump; 112-a buffer tank; 113-self priming pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below.
Referring to fig. 1, it is a schematic diagram of the continuous blending device of fracturing fluid of the present invention, including: the device comprises two automatic feeding units (a rubber powder automatic feeding unit 7 and a salt powder automatic feeding unit 6), a rubber powder metering unit, a salt powder metering unit, a liquid additive supply unit, a clear water supply unit, a water powder mixer 3, a salt water mixer 2, a fluid mixer 4, a control unit 1 and an automatic liquid sending unit 5. The rubber powder metering unit, the salt powder metering unit, the rubber powder automatic feeding unit 7, the salt powder automatic feeding unit 6, the liquid additive supply unit, the clear water supply unit, the water powder mixer 3, the salt water mixer 2, the fluid mixer 4 and the control unit 1 can be arranged on a flat-bed semi-trailer. The above components are explained one by one.
Referring to fig. 1, the rubber powder automatic feeding unit 7 is connected with the rubber powder metering unit to automatically feed materials to the rubber powder metering unit; and the salt powder automatic feeding unit 6 is connected with the salt powder metering unit so as to automatically feed the salt powder metering unit. Specifically, in this embodiment, the rubber powder automatic feeding unit 7 and the salt powder automatic feeding unit 6 have the same structure, and each include: the conveying belt, the bag breaking machine located at one end of the conveying belt, the conveying hose arranged at the outlet of the bag breaking machine and the like. Wherein, can set up protruding line above the conveyer belt, prevent the landing of bagged materials to the conveyer belt expandes when using, in the transportation, rotatable folding is hung on the bag-breaking machine. The bagged dry powder materials conveyed by the conveyor belt enter a bag breaker, and bag breaking and separation of the dry powder materials from the bags are completed through operation of equipment such as a cutting knife, a screen drum and the like in the bag breaker. The dry powder material is screened into the bottom of the bag breaking machine through a drum screen, the dry powder material is conveyed into a conveying hose by a double-helix pusher at the bottom of the bag breaking machine, and the dry powder material is conveyed to a plant rubber powder feeding tank and a salt powder feeding tank respectively through conveying pipes by means of the self gravity. In order to accelerate the feeding speed, a pneumatic conveyor can be arranged between the outlet of the bag breaking machine and the conveying hose, salt powder or plant rubber powder materials are conveyed into the hose through pneumatic force, and therefore dry powder materials are conveyed into the mixing and adding unit. However, since the loading unit with the pneumatic conveyor occupies a large area, a loading unit structure without the pneumatic conveyor is preferable from the viewpoint of space saving. The rubber powder automatic bag breaking and feeding unit is used, so that the labor intensity of workers is reduced, a full-sealing design is realized, and the surrounding environment of a fracturing operation site is protected.
And a rubber powder metering unit which conveys the plant rubber powder from the conveying hose of the rubber powder automatic feeding unit 7 to the water powder mixer 3 at a specified flow rate. Specifically, in this embodiment, referring to fig. 2, the rubber powder metering unit comprises a rubber powder storage tank 91 and a rubber powder metering system arranged on the rubber powder storage tank 91. The inlet of the rubber powder storage tank 91 is connected with the outlet of the rubber powder automatic feeding unit 7, namely a conveying hose, and the outlet is connected with the water powder mixer 3 through a rubber powder pipeline and used for receiving and storing rubber powder and conveying the rubber powder to the water powder mixer 3 under the action of gravity; the rubber powder metering system comprises a rubber powder level switch 92 arranged on the tank body of the rubber powder storage tank 91 and is used for detecting the quantity of rubber powder in the rubber powder storage tank 91 and is controlled by the control unit 1 so as to realize the control of the feeding quantity of the rubber powder automatic feeding unit 7; a rubber powder flow regulating valve 94 arranged at the outlet of the rubber powder storage tank 91 and used for controlling the output speed of rubber powder; the rubber powder meter 93 such as an electronic scale is connected with the level switch 92 and the rubber powder flow regulating valve 94, and the rubber powder meter 93 and the level switch 92 are connected with the control unit 1 and feed measured data back to the control unit 1, so that the control unit 1 can regulate the opening degree of the rubber powder flow regulating valve 94 according to requirements.
And a salt powder metering unit which conveys the potassium chloride from the conveying hose of the salt powder automatic feeding unit 6 to the salt water mixer 2 at a specified flow rate. In particular, in this embodiment, referring to fig. 2, the salt metering unit comprises a salt storage tank 81 and a salt metering system disposed thereon. The inlet of the salt powder storage tank 81 is connected with the outlet of the salt powder automatic feeding unit 6, namely a conveying hose, and the outlet is connected with the salt water mixer 2 through a salt powder pipeline and used for receiving and storing salt powder and conveying the salt powder to the salt water mixer 2 through the action of gravity; the salt powder metering system comprises a salt powder level switch 82 arranged on the tank body of the salt powder storage tank 81, and is used for detecting the amount of salt powder in the salt powder storage tank 81 and controlling the amount of the salt powder fed by the automatic salt powder feeding unit 6 by the control unit 1; a salt powder flow regulating valve 84 arranged at the outlet of the salt powder storage tank 81 and used for controlling the output speed of the salt powder; the salt powder meter 83, such as an electronic scale, connected to the level switch 82 and the salt powder flow regulating valve 84 is connected to the control unit 1, and the salt powder meter 83 and the level switch 82 feed back measurement data to the control unit 1, so that the control unit 1 can regulate the opening degree of the salt powder flow regulating valve 84 as required.
The structures of the salt powder metering unit and the rubber powder metering unit are not limited to the above structures, and the salt powder metering unit can also be arranged as the following structures and comprises: the automatic salt powder feeding device comprises a salt powder automatic feeding unit, a salt powder storage tank, a salt powder screw feeder, a salt powder metering meter, such as an electronic scale, wherein the salt powder automatic feeding unit is connected with an outlet of the salt powder automatic feeding unit and used for receiving and storing salt powder, one end of the salt powder storage tank is arranged at an outlet of the salt powder storage tank and used for conveying salt powder to a salt water mixer, and the salt powder metering meter, such as an electronic scale, is arranged at the bottom of the salt powder screw feeder and connected with a control unit and used for metering the blanking amount of the. The rubber powder metering unit specifically comprises: the automatic rubber powder feeding device comprises a rubber powder storage tank, a rubber powder spiral feeder, a rubber powder meter and a control unit, wherein the rubber powder storage tank is connected with an outlet of the automatic rubber powder feeding unit and used for receiving and storing rubber powder, one end of the rubber powder spiral feeder is arranged at an outlet of the rubber powder storage tank and used for conveying the rubber powder to a water-powder mixer, the rubber powder meter is arranged at the bottom of the rubber powder spiral feeder and connected with the control unit, and the rubber powder meter is used for measuring the blanking amount of the rubber powder in real. The salt powder metering unit and the rubber powder metering unit with the structure can also simply feed salt powder and rubber powder into the salt water mixer and the water powder mixer quantitatively and uniformly.
And a clear water supply unit for quantitatively supplying clear water mixed with the vegetable gum powder to the water powder mixer 3 and quantitatively supplying clear water mixed with the salt powder to the salt water mixer 2. Specifically, in this embodiment, referring to fig. 1, the fresh water supply unit includes: the system comprises a first water pump 102 for supplying water to a water powder mixer 3, a first flow meter 105 for monitoring the flow of the water supplied by the first water pump, a first flow regulating valve 106 for regulating the flow of the first water pump 102, a second water pump 101 for supplying water to a brine mixer 2, a second flow meter 103 for monitoring the flow of the water supplied by the second water pump 101, and a second flow regulating valve 104 for regulating the flow of the second water pump 101. The first flow meter 105, the second flow meter 103, the first flow regulating valve 106 and the second flow regulating valve 104 are all connected with the control unit 1, and the control unit 1 controls the flow of the first water pump 102 through the first flow regulating valve 106 according to the feedback results of the rubber powder metering unit and the first flow meter 105 so as to realize the quantitative proportioning mixing of the vegetable rubber powder and the water in the water-powder mixer 3; the control unit also controls the flow of the second water pump 101 through the second flow regulating valve 104 according to the feedback results of the salt powder metering unit and the second flow meter 103 to achieve the stoichiometric mixing of potassium chloride and water in the brine mixer 2.
The water-powder mixer 3 is respectively connected with the outlet of the rubber powder metering unit and the outlet of the first water pump 102 of the clear water supply unit, and is used for receiving the plant rubber powder from the rubber powder metering unit and the clear water from the first water pump 102 and fully mixing the plant rubber powder and the clear water to obtain a plant rubber powder concentrated solution; specifically, in this embodiment, the water-powder mixer is a water-powder mixer conventional in the art, and the mixing of water and rubber powder is completed by means of mechanical stirring.
And the brine mixer is respectively connected with the outlet of the salt powder metering unit and the outlet of the second water pump 101 of the clear water supply unit, and is used for receiving the salt powder from the salt powder metering unit and the clear water from the second water pump 101 and fully mixing the salt powder and the clear water to obtain a potassium chloride concentrated solution. The mixer may be a mixing tank commonly used in the art, which accomplishes thorough mixing of water and salt fines by means of mechanical agitation.
A liquid additive supply unit for quantitatively supplying various liquid additives to the fluid mixer 4; specifically, in this embodiment, the liquid additive employs a bactericide, a cleanup additive, a clay stabilizer, and a preservative, and the liquid additive supply unit includes: 4 pneumatic pumps 111, 4 surge tanks 112, and 4 self-priming pumps 113. 4 pneumatic pumps 111 for delivering the barreled bactericide, cleanup additive, clay stabilizer and preservative to respective buffer tanks 112; 4 buffer tanks 112 for temporarily storing the above 4 liquid additives; 4 self-priming pumps 113 for pumping the 4 liquid additives mentioned above into the fluid mixer 4.
And the fluid mixer 4 is respectively connected with the water powder mixer 3, the saline mixer 2 and the liquid additive supply unit and is used for simultaneously receiving the plant rubber powder concentrated solution from the water powder mixer, the potassium chloride concentrated solution from the saline mixer and various liquid additives from the liquid additive supply unit and fully mixing the plant rubber powder concentrated solution, the potassium chloride concentrated solution and the various liquid additives to obtain the fracturing fluid. Specifically, in this embodiment, the fluid mixer includes a tank 41, a plurality of baffles 44, and a plurality of baffles 45. The tank 41 is a hollow structure, and has a cavity inside, and the cavity is connected through an inlet 42 for inputting liquid and an outlet 43 for outputting liquid, as shown in fig. 2, and the arrows indicate the flowing direction of the liquid. The partitions 44 are disposed in parallel and vertically in the cavity inside the tank 41, and each partition 44 has a height smaller than the inner height of the cavity, so that an opening 402 is formed between one end of the partition 44 and the upper and lower walls of the cavity. The upper and lower ends of adjacent partitions 44 are secured to the upper and lower walls of the chamber, respectively. The baffle 45 has one end fixed to a side of the partition 44 and the other end inclined downward at a distance from the adjacent other partition 44. Thus, the inlet 42, the opening 402, the gap 401 between adjacent partitions 44, and the outlet 43 form a fluid path. Preferably, a through hole 403 communicating with the outside of the tank 41 is formed at the bottom of the liquid passage, i.e., the bottom of the tank 41, so as to prevent the liquid from remaining inside the tank 41 or being used for cleaning the tank.
Specifically, the mixing tank 4 is used for fully mixing the mixed rubber powder concentrated solution, the potassium chloride concentrated solution and the liquid chemical additive from the liquid additive supply unit, and then outputting the mixture to a liquid sending manifold through a liquid sending pump, wherein the liquid sending manifold can be directly driven into a sand mixing truck, so that complete and continuous liquid preparation and sand mixing are realized. In blending tank 4, the mixed liquor enters into the interior of jar body 41 from the import 42 of bottom to overcome gravity flow direction blending tank's top, gets into clearance 401 via opening 402 and then changes twice flow direction through two-layer baffle 45 downwards, then goes out of jar after repeating this process, obtains the fracturing fluid of misce bene.
The control unit 1 is connected with the rubber powder metering unit, the salt powder metering unit, the clear water supply unit and the liquid additive supply unit and is used for reading the flow of the rubber powder in the rubber powder metering unit so as to control the flow of the clear water supply unit when supplying water to the water-powder mixer 3; the device is used for reading the flow of the salt powder in the salt powder metering unit so as to control the flow of the clear water supply unit when supplying water to the salt water mixer 2; the flow rates of the various liquid additives in the liquid additive supply unit are controlled. Specifically, in an embodiment, referring to fig. 2, the controlled unit is a PLC (programmable logic controller).
An automatic hair liquid unit 5 connected to the fluid mixer 4; a liquid level monitor is arranged in the fluid mixer 4, and the automatic liquid sending unit 5 can automatically control the liquid sending amount of the fracturing liquid according to the liquid level of the fluid mixer 4. Specifically, in this embodiment, the automatic liquid sending unit includes the liquid sending pump, set up flowmeter and the automatically regulated valve on the liquid sending pump export liquid sending manifold, the liquid sending pump is used for pumping the fracturing fluid after mixing out the fluid mixer, and the flowmeter measurement fracturing fluid liquid sending volume adjusts the automatically regulated valve opening according to the liquid level height of liquid level monitor monitoring in the fluid mixer to guarantee fracturing fluid liquid sending speed and liquid sending volume.
The working principle of the mixing device of the embodiment of the invention is as follows:
the plant rubber powder (such as guar gum or fenugreek gum and other thickeners) is conveyed to an automatic bag breaking machine of an automatic rubber powder feeding unit through a conveyor belt to break and realize automatic separation of powder bags, then the plant rubber powder is automatically fed into a rubber powder storage tank of a rubber powder metering unit by virtue of the self gravity of the rubber powder through a spiral feeding device in the automatic rubber powder feeding unit or directly through a conveying hose arranged at the outlet of the bag breaking machine, then the rubber powder is loosened through a dry powder loosening device arranged below the rubber powder storage tank, the loosened rubber powder is uniformly fed into a water powder mixer through a spiral feeder, in addition, the blanking amount of the rubber powder is measured in real time by an electronic scale arranged at the bottom of the spiral feeder to realize quantitative rubber powder feeding, meanwhile, a control unit PLC reads the flow of the rubber powder and controls the flow of a first water pump of an external clear water supply unit through a first flow regulating valve according to the first flow result of a clear, so that the rubber powder and the clear water are mixed according to the specified proportion, and the rubber powder and the water in the quantitative proportion are fully mixed by a water-powder mixer to obtain the plant rubber powder concentrated solution. Bagged salt powder (such as potassium chloride, sodium chloride and other solid additives) is conveyed to an automatic bag breaking machine of an automatic salt powder feeding unit through a conveying belt to break and separate the automatic powder bag, then the salt powder is automatically fed into a salt powder storage tank of a salt powder metering unit through a spiral feeding device in the automatic salt powder feeding unit or directly through a conveying hose arranged at the outlet of the bag breaking machine by the self gravity of the salt powder, the salt powder is loosened through a dry powder loosening device arranged below the salt powder storage tank, the loosened rubber powder is uniformly fed into a salt-water mixer through a spiral feeder, in addition, the blanking amount of the salt powder is measured in real time by an electronic metering scale arranged at the bottom of the spiral feeder to realize the quantitative feeding of the salt powder, meanwhile, a control unit PLC reads the flow of the salt powder and controls the flow of a second water pump of an external clear water supply unit through a second flow regulating valve according to the result of a second flow meter of the clear water supply unit, and fully mixing the clear water and the salt powder in a salt water mixing tank according to the specified proportion to obtain a salt water concentrated solution. Various barreled liquid chemical additives are pumped into various buffer tanks by a pneumatic pump and are pumped into a fluid mixer by respective self-sucking pumps; simultaneously, during plant rubber powder concentrated solution and the concentrated solution of salt water were pumped the fluid mixer into through each corresponding self priming pump, realized the intensive mixing of all fluidss, the liquid level height was responsible for monitoring to the liquid level watch-dog that sets up in the fluid mixer, and when reacing appointed height, automatic liquid unit of sending out realized automatic liquid and control the liquid volume of sending out. The device can realize the simultaneous addition of all materials without a sequential extension sequence.
The utility model can realize the continuous and large-flow complete preparation of the fracturing fluid; the continuously prepared fracturing fluid has no powder-in-water phenomenon, the viscosity of the solution rises quickly (the viscosity of the fracturing fluid reaches more than 45 centipoises within 3 minutes), the fracturing fluid is uniformly mixed (the integral viscosity of the fracturing fluid is uniform, and no layering phenomenon exists), and the fracturing fluid has high quality (crosslinking).
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A continuous blending device for fracturing fluid is characterized by comprising:
the rubber powder metering unit is used for quantitatively feeding the plant rubber powder;
the salt powder metering unit is used for quantitatively feeding salt powder;
the rubber powder automatic feeding unit is connected with the rubber powder metering unit so as to automatically feed materials to the rubber powder metering unit;
the automatic salt powder feeding unit is connected with the salt powder metering unit so as to automatically feed materials to the salt powder metering unit;
a liquid additive supply unit for quantitatively supplying various liquid additives;
the clear water supply unit is used for quantitatively supplying clear water mixed with the plant rubber powder and quantitatively supplying clear water mixed with the salt powder;
the water-powder mixer is respectively connected with the rubber powder metering unit and the clear water supply unit and is used for receiving the vegetable rubber powder from the rubber powder metering unit and the clear water from the clear water supply unit and fully mixing the vegetable rubber powder and the clear water to obtain a concentrated vegetable rubber powder solution;
the brine mixer is respectively connected with the salt powder metering unit and the clear water supply unit and is used for receiving the salt powder from the salt powder metering unit and the clear water from the clear water supply unit and fully mixing the salt powder and the clear water to obtain a potassium chloride concentrated solution;
the fluid mixer is respectively connected with the water powder mixer, the brine mixer and the liquid additive supply unit and is used for simultaneously receiving the plant gum powder concentrated solution from the water powder mixer, the potassium chloride concentrated solution from the brine mixer and various liquid additives from the liquid additive supply unit and fully mixing the plant gum powder concentrated solution, the potassium chloride concentrated solution from the brine mixer and the various liquid additives to obtain fracturing fluid;
the control unit is at least connected with the rubber powder metering unit, the salt powder metering unit, the clear water supply unit and the liquid additive supply unit and is used for reading the flow of the rubber powder in the rubber powder metering unit so as to control the flow of the clear water supply unit when supplying water to the water-powder mixer; the device is used for reading the flow of the salt powder in the salt powder metering unit so as to control the flow of the clear water supply unit when supplying water to the salt water mixer; controlling the flow rates of the respective liquid additives in the liquid additive supply unit;
the automatic rubber powder feeding unit and the automatic salt powder feeding unit have the same first structure or second structure,
the first structure includes: the conveying belt is used for conveying bagged dry powder materials; the bag breaking machine is positioned at one end of the conveyor belt and used for breaking the bag body containing the dry powder material and separating the dry powder material from the bag body; the pneumatic conveyor is arranged at the outlet of the bag breaking machine and used for pneumatically conveying the dry powder material; one end of the conveying hose is connected to the outlet of the pneumatic conveyor, and the other end of the conveying hose is connected to the rubber powder metering unit or the salt powder metering unit and used for outputting dry powder materials; or,
the second structure includes: the conveying belt is used for conveying bagged dry powder materials; the bag breaking machine is positioned at one end of the conveyor belt and used for breaking the bag body containing the dry powder material and separating the dry powder material from the bag body; one end of the conveying hose is connected with the outlet of the bag breaking machine, the other end of the conveying hose is connected with the rubber powder metering unit or the salt powder metering unit, and the conveying of the dry powder material is completed by means of the self gravity of the dry powder material;
the conveying belt is provided with raised lines to prevent bagged materials from sliding off, is unfolded when in use and can be rotatably folded and hung on the bag breaking machine in the transportation process;
the rubber powder metering unit is provided with a third structure or a fourth structure;
the third structure includes: the rubber powder storage tank is connected with the outlet of the rubber powder automatic feeding unit and is used for receiving and storing rubber powder; one end of the rubber powder spiral feeder is arranged at the outlet of the rubber powder storage tank and is used for conveying rubber powder to the water-powder mixer; the rubber powder meter is arranged at the bottom of the rubber powder spiral feeder, is connected with the control unit and is used for measuring the blanking amount of rubber powder in real time;
the fourth structure includes: the inlet of the rubber powder storage tank is connected with the outlet of the rubber powder automatic feeding unit, and the outlet of the rubber powder storage tank is connected with the water powder mixer through a rubber powder pipeline and used for receiving and storing rubber powder and conveying the rubber powder to the water powder mixer through the action of gravity; the rubber powder measurement system set up in on the rubber powder storage tank, the rubber powder measurement system includes: the rubber powder level switch is arranged on the tank body of the rubber powder storage tank and used for detecting the quantity of rubber powder in the rubber powder storage tank so as to control the feeding quantity of the rubber powder automatic feeding unit through the control unit; the rubber powder flow regulating valve is arranged at the outlet of the rubber powder storage tank and is used for controlling the output speed of rubber powder; the rubber powder meter is connected with the material level switch and the rubber powder flow regulating valve and is used for regulating the opening degree of the rubber powder flow regulating valve according to the requirement; the control unit adjusts the rubber powder flow regulating valve according to the feedback results of the rubber powder level switch and the rubber powder meter;
the salt powder metering unit has a fifth structure or a sixth structure;
the fifth structure includes: the salt powder storage tank is connected with the outlet of the salt powder automatic feeding unit and is used for receiving and storing salt powder; one end of the salt powder spiral feeder is arranged at the outlet of the salt powder storage tank and used for conveying salt powder to the salt water mixer; and the salt powder meter is arranged at the bottom of the salt powder spiral feeder, is connected with the control unit and is used for measuring the blanking amount of the salt powder in real time
The sixth structure includes: the inlet of the salt powder storage tank is connected with the outlet of the salt powder automatic feeding unit, and the outlet of the salt powder storage tank is connected with the salt water mixer through a salt powder pipeline and used for receiving and storing salt powder and conveying the salt powder to the salt water mixer through the action of gravity; salt powder measurement system set up in on the salt powder storage tank, salt powder measurement system includes: the salt powder level switch is arranged on the tank body of the salt powder storage tank and used for detecting the amount of salt powder in the salt powder storage tank so as to control the feeding amount of the automatic salt powder feeding unit through the control unit; the salt powder flow regulating valve is arranged at the outlet of the salt powder storage tank and used for controlling the output speed of the salt powder; the salt powder meter is connected with the material level switch and the salt powder flow regulating valve and is used for regulating the opening degree of the salt powder flow regulating valve according to the requirement; and the control unit adjusts the salt powder flow regulating valve according to the salt powder level switch and the feedback result of the salt powder meter.
2. The continuous compounding device of claim 1, further comprising: the automatic liquid sending unit is connected with the outlet of the fluid mixer; and a liquid level monitor is arranged in the fluid mixer, and the automatic liquid sending unit can automatically control the liquid sending amount of the fracturing liquid according to the liquid level of the fluid mixer.
3. The fracturing fluid continuous compounding device of claim 1, wherein the liquid additive supply unit comprises: n pneumatic pumps, N buffer tanks and N self-priming pumps; the N pneumatic pumps are used for conveying N liquid additives to respective buffer tanks; the N buffer tanks are used for temporarily storing N liquid additives; the N self-sucking pumps are respectively used for pumping N liquid additives in the N buffer tanks into the fluid mixer; wherein N is an integer of 1 or more.
4. The continuous fracturing fluid blending device according to claim 1, wherein the clean water supply unit comprises: the first water pump is used for supplying water to the water-powder mixer; the first flowmeter is used for monitoring the flow of the water supplied by the first water pump and is connected with the control unit; the control unit controls the flow of the first water pump through the first flow regulating valve according to feedback results of the rubber powder metering unit and the first flow meter; a second water pump for supplying water to the brine mixer; the second flowmeter is used for monitoring the flow of the water supplied by the second water pump and is connected with the control unit; and the control unit controls the flow of the second water pump through the second flow regulating valve according to the feedback results of the salt powder metering unit and the second flow meter.
5. The continuous blending device for fracturing fluid according to claim 1, wherein the control unit is a PLC, and the control unit further controls the flow rate of the solution supplied to the fluid mixer by the water powder mixer and the saline mixer.
6. The continuous compounding assembly of claim 1, wherein the fluid mixer comprises: the tank body is internally provided with a cavity; the separation plates are arranged in the cavity in the tank body in parallel and vertically, the height of each separation plate is smaller than the internal height of the cavity, the upper ends and the lower ends of the adjacent separation plates are respectively fixed on the upper wall and the lower wall of the cavity, and a liquid channel is formed between the free ends of the separation plates and the upper wall or the lower wall of the cavity and between the adjacent separation plates.
7. The continuous compounding assembly of claim 6, wherein the fluid mixer further comprises: one end of the baffle is fixed on the side surface of the clapboard, and the other end of the baffle inclines downwards and keeps a distance with another adjacent clapboard; the baffle is arranged in a liquid channel through which the fluid flows from top to bottom.
8. The continuous blending device for fracturing fluid according to claim 6, wherein a through hole communicated with the outside of the tank body is arranged at the bottom of the fluid mixer so as to avoid liquid from remaining in the tank body or cleaning the tank.
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| CN108868735A (en) * | 2018-07-17 | 2018-11-23 | 汤树林 | A kind of feed liquid method suitable for mountain area pressing crack construction |
| CN110860152A (en) * | 2019-11-22 | 2020-03-06 | 江苏徐工工程机械研究院有限公司 | Additive mixing system and method and dust suppression vehicle |
| CN116370873B (en) * | 2023-06-01 | 2023-09-12 | 常州华立阀门控制设备有限公司 | Intelligent electric valve actuator with controllable flow |
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