Rapid preparation system and method of fracturing fluid drag reducer

Abstract

The invention provides a rapid preparation system and method for a fracturing fluid drag reducer, and belongs to the technical field of drag reducer preparation. The system comprises a feeding mechanism used for feeding stored drag reducer powder to the feeding mechanism; a feeding port of the feeding mechanism is connected with a discharging port of the material supply mechanism, a discharging port of the feeding mechanism is connected with a feeding port of the powder-liquid mixing mechanism, and the feeding mechanism is used for evenly supplying drag reducer powder to the powder-liquid mixing mechanism; the water solvent supply mechanism is connected with the liquid inlet of the powder-liquid mixing mechanism and is used for supplying a water solvent to the powder-liquid mixing mechanism; the powder-liquid mixing mechanism is used for mixing the drag reducer powder and the water solvent to form the drag reducer; the output mechanism is connected with the discharge hole of the powder-liquid mixing mechanism and is used for outputting the drag reducer outwards; and the inert gas supply mechanism is used for supplying inert gas into the feeding mechanism and the powder-liquid mixing mechanism so as to isolate air. The system is simple in structure, continuous and rapid preparation of the fracturing fluid drag reducer can be achieved, the mixing quality is improved, and the fracturing operation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of drag reducer preparation, and in particular to a rapid preparation system and a rapid preparation method of a fracturing fluid drag reducer. Background Art

[0002] Unconventional oil and gas has become an important part of the national oil and gas supply, with huge production potential. In the process of unconventional oil and gas extraction, especially in fracturing operations, the demand for the use and performance of fracturing fluids is also increasing. Drag reducers are the main additives for fracturing fluid mixing and are the key components of fracturing fluid drag reduction and sand carrying. The emerging polymer drag reducer products based on acrylamide compounds can form stable drag reducing additives by dissolving in water solvents. They can be synthesized in large quantities industrially, with stable supply and low price, and have become the main raw materials for the preparation of drag reducers.

[0003] However, the current preparation of drag reducers usually involves packaging them in the factory and then transporting them to the fracturing site for storage and standby use. The entire process involves high costs for personnel, environmental protection, warehousing, transportation, packaging and other supporting facilities. The drag reducer preparation process technology and process are cumbersome, making the cost of fracturing operations high and difficult to control. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a system and method for rapidly preparing a fracturing fluid drag reducer, so as to solve the above-mentioned problem that the current drag reducer preparation is usually prepared in a factory and then packaged and then transported to the fracturing site for standby use. The whole process involves high costs for personnel, environmental protection, warehousing, transportation, packaging and other supporting facilities, and the drag reducer preparation process technology and process are cumbersome, which makes the cost of fracturing operations high and difficult to control.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a system for rapidly preparing a fracturing fluid drag reducer, the system comprising: A feeding mechanism, used for supplying the stored drag reducer powder to the feeding mechanism; A feeding mechanism, wherein the feeding port of the feeding mechanism is connected to the discharging port of the feeding mechanism, and the discharging port of the feeding mechanism is connected to the feeding port of the powder-liquid mixing mechanism, and is used for uniformly supplying the drag reducer powder to the powder-liquid mixing mechanism; A water solvent supply mechanism is connected to the liquid inlet of the powder-liquid mixing mechanism and is used to supply water solvent to the powder-liquid mixing mechanism; A powder-liquid mixing mechanism, used for mixing drag reducer powder and water solvent to form a drag reducer; An output mechanism, connected to the discharge port of the powder-liquid mixing mechanism, for outputting the drag reducing agent to the outside; The inert gas supply mechanism is connected to the feeding mechanism and the powder-liquid mixing mechanism, and is used to supply inert gas into the feeding mechanism and the powder-liquid mixing mechanism to isolate the air.

[0006] Optionally, the system further includes: The auxiliary agent injection mechanism is connected to the liquid inlet of the powder-liquid mixing mechanism and is used for injecting auxiliary agents into the powder-liquid mixing mechanism.

[0007] Optionally, the system further includes: The powder recovery mechanism is connected with the feeding mechanism and the feeding mechanism and is used for recovering the drag reducing agent powder.

[0008] Optionally, the feeding mechanism includes: A blower, wherein the air outlet of the blower is connected to the feeding mechanism through a feeding pipeline; A discharge platform, used for containing drag reducer powder, wherein a discharge channel is provided inside the discharge platform, and the discharge channel is communicated with the feed pipe; The vacuum feeder is connected to the feeding mechanism and is used to form a vacuum negative pressure environment in the feeding pipeline to realize the transportation of the drag reducing agent powder.

[0009] Optionally, the feeding mechanism further includes: The gas filtering mechanism is arranged at the air inlet of the blower and is used for filtering the gas entering the blower.

[0010] Optionally, the feeding mechanism includes: A silo connected to the discharge port of the feeding mechanism and used to collect the drag reducing agent powder; A feeder, wherein the feed port of the feeder is connected to the discharge port of the silo, and the discharge port of the feeder is connected to the feed port of the powder-liquid mixing mechanism, and is used for uniformly supplying drag reducer powder to the powder-liquid mixing mechanism.

[0011] Optionally, the water solvent supply mechanism includes: A water pump, the water outlet of the water pump is connected to the liquid inlet of the powder-liquid mixing mechanism through a liquid delivery pipeline; The liquid filtering mechanism is arranged at the water inlet of the water pump and is used for filtering the liquid entering the water pump.

[0012] Optionally, the water solvent supply mechanism further includes: The drainage pipeline is connected to the liquid delivery pipeline and is used for adjusting the flow of the liquid delivery pipeline and for emergency drainage.

[0013] Optionally, the output mechanism includes: A material barrel, connected to the discharge port of the powder-liquid mixing mechanism, for caching and transferring the drag reducing agent; An output pump, wherein the feed port of the output pump is connected to the discharge port of the barrel, and is used for outputting the drag reducing agent to the outside.

[0014] The embodiment of the present invention further provides a method for rapidly preparing a fracturing fluid drag reducer, which is applied to the aforementioned system for rapidly preparing a fracturing fluid drag reducer. The method comprises: Control the powder-liquid mixing mechanism to shear and grind at the set speed; Control the feeding mechanism and the feeding mechanism to continuously and quantitatively transport the drag reducer powder to the powder-liquid mixing mechanism, and at the same time, control the water solvent supply mechanism to continuously and quantitatively transport the water solvent to the powder-liquid mixing mechanism; The output mechanism is controlled to work and continuously discharge the fracturing fluid drag reducer to the outside for use in on-site fracturing.

[0015] Optionally, the method further includes: While controlling the feeding mechanism and the material feeding mechanism to start working, the powder recovery mechanism is controlled to operate to recover the drag reducing agent powder; After the fracturing fluid drag reducer is exhausted, the inert gas supply mechanism is controlled to supply inert gas to the feeding mechanism and the powder-liquid mixing mechanism to perform air sealing.

[0016] The rapid preparation system of the fracturing fluid drag reducer of the technical solution has a simple structure, can realize the continuous and rapid preparation of the fracturing fluid drag reducer, improve the mixing quality of the drag reducer, so as to meet the production needs of the fracturing operation, and, by preparing at the fracturing operation site, effectively avoids the off-site preparation, transportation and storage of the fracturing fluid drag reducer, greatly reduces the cost of the fracturing operation, and at the same time, it is ready for use, convenient and controllable, the fracturing fluid drag reducer has a high proportion of effective ingredients, and is more suitable for actual production applications, thereby reducing costs and increasing efficiency for fracturing operations.

[0017] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of a rapid preparation system of a fracturing fluid drag reducer provided by the present invention; Figure 2 It is a schematic diagram of the overall structure of another system for rapidly preparing a fracturing fluid drag reducer provided by the present invention; Figure 3 It is a detailed structural schematic diagram of the system for rapidly preparing the fracturing fluid drag reducer provided by the present invention; Figure 4This is a control logic block diagram of a rapid preparation system for a fracturing fluid drag reducer provided by the present invention; Figure 5 The present invention provides a flow chart of a method for rapidly preparing a fracturing fluid drag reducer.

[0019] Description of Reference Numerals 1-feeding mechanism; 2-feeding mechanism; 3-water solvent supply mechanism; 4-powder-liquid mixing mechanism; 5-output mechanism; 6-inert gas supply mechanism; 7-additive injection mechanism; 8-powder recovery mechanism; 11-blower; 12-feeding pipeline; 13-unloading platform; 14-vacuum feeder; 15-gas filtering mechanism; 21-silo; 22-feeder; 31-water pump; 32-delivery pipeline; 33-liquid filtering mechanism; 34-drainage pipe; 51-material barrel; 52-output pump; 901- material delivery control valve; 902- material drop control valve; 903- material feed control valve; 904- output control valve; 905- overflow control valve; 906- barrel control valve; 907- water delivery control valve; 908- flow control valve; 909- density meter; 910 - Flow meter. DETAILED DESCRIPTION

[0020] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0021] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the inventive product is usually placed when in use.

[0022] The terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0023] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0024] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Figure 1 It is a schematic diagram of the overall structure of a rapid preparation system of a fracturing fluid drag reducer provided by the present invention; Figure 2 It is a schematic diagram of the overall structure of another system for rapidly preparing a fracturing fluid drag reducer provided by the present invention; Figure 3 It is a detailed structural schematic diagram of the system for rapidly preparing the fracturing fluid drag reducer provided by the present invention; Figure 4 This is a control logic block diagram of a rapid preparation system for a fracturing fluid drag reducer provided by the present invention; Figure 5 The present invention provides a flow chart of a method for rapidly preparing a fracturing fluid drag reducer.

[0028] like Figure 1 As shown, this embodiment provides a system for rapidly preparing a fracturing fluid drag reducer, the system comprising: A feeding mechanism 1 is used to supply the stored drag reducing agent powder to a feeding mechanism 2; A feeding mechanism 2, wherein the feeding port of the feeding mechanism 2 is connected to the discharging port of the feeding mechanism 1, and the discharging port of the feeding mechanism 2 is connected to the feeding port of the powder-liquid mixing mechanism 4, for uniformly supplying the drag reducing agent powder to the powder-liquid mixing mechanism 4; The water solvent supply mechanism 3 is connected to the liquid inlet of the powder-liquid mixing mechanism 4 and is used to supply the water solvent to the powder-liquid mixing mechanism 4; The powder-liquid mixing mechanism 4 is used for mixing the drag reducer powder and the water solvent to form the drag reducer; An output mechanism 5, connected to the discharge port of the powder-liquid mixing mechanism 4, for outputting the drag reducing agent to the outside; The inert gas supply mechanism 6 is connected to the feeding mechanism 2 and the powder-liquid mixing mechanism 4, and is used to supply inert gas into the feeding mechanism 2 and the powder-liquid mixing mechanism 4 to isolate the air.

[0029] Specifically, the drag reducer powder is stored in the feeding mechanism 1. In order to reduce the diffusion of the drag reducer powder during the transportation process, the feeding is carried out by positive pressure, negative pressure, mechanical feeding, etc., so as to reduce environmental pollution and raw material loss; at the same time, the drag reducer powder is transported to the inside of the feeding mechanism 2, and the internal structure of the feeding mechanism 2 is further used to achieve uniform and stable quantitative transportation of the drag reducer powder to the powder-liquid mixing mechanism 4. In this way, uniform stirring can be guaranteed; while the drag reducer powder is uniformly, continuously and quantitatively transported to the powder-liquid mixing mechanism 4, the water solvent is uniformly, continuously and quantitatively supplied to the powder-liquid mixing mechanism 4 through the water solvent supply mechanism 3, and then the powder-liquid mixing mechanism 4 performs high-speed shearing and grinding to form a drag reducer, and the drag reducer is continuously output to the outside through the output mechanism 5 to perform fracturing operations. The powder-liquid mixing mechanism 4 specifically drives the slurry to rotate through a motor to achieve shearing and grinding. The powder-liquid mixing mechanism 4 is designed based on the solubility characteristics of the fracturing fluid drag reducer, combines the solid-liquid dispersion technology with the fracturing fluid drag reducer, and utilizes a mechanical structure to achieve rapid and uniform dispersion of the drag reducer powder and the water solvent and accelerate the performance. The drag reducer powder and the water solvent delivered by the feeding mechanism 2 and the water solvent supply mechanism 4 are quantitatively and continuously input, which can achieve continuous preparation and continuous output of the fracturing fluid drag reducer.

[0030] In addition, the inert gas supply mechanism 6 can adopt an inert gas cylinder, which can output dry inert gas and supply inert gas at different stages, such as supplying gas during the stirring process and in the process of conveying the drag reducer outward after the stirring is completed, so as to protect the product. In addition, after the drag reducer is conveyed, all mechanisms in the system are shut down and gas is supplied, so as to protect the feeding mechanism 2 and the powder-liquid mixing mechanism 4, seal the pipeline, and keep the pipeline dry. Correspondingly, a gas valve is provided on the gas transmission pipeline to realize the control of gas supply on and off and gas supply volume.

[0031] In view of the problems of inefficiency, slowness, high cost, inconvenient storage and transportation in the preparation and application of traditional fracturing fluid drag reducers, a rapid preparation system and process of fracturing fluid drag reducers has been specially designed and developed. The system has a simple structure and is used for real-time mixing and application of drag reducers at the fracturing operation site, effectively avoiding the off-site preparation, transportation and storage of fracturing fluid drag reducers, greatly reducing the cost of fracturing operations. At the same time, it is ready for use, convenient and controllable, and the effective ingredients of fracturing fluid drag reducers account for a high proportion, making it more suitable for actual production applications. It reduces costs and increases efficiency for fracturing operations, fills the gap in technical equipment for the rapid and efficient preparation and supply of drag reducers at fracturing operations, realizes real-time and rapid preparation of fracturing fluid drag reducers on site, can produce continuously and complete the continuous supply of fracturing operations, greatly improves mixing efficiency while ensuring mixing effects.

[0032] Furthermore, if Figure 2 As shown, the system also includes: The auxiliary agent injection mechanism 7 is connected to the liquid inlet of the powder-liquid mixing mechanism 4 and is used for injecting auxiliary agents into the powder-liquid mixing mechanism 4 .

[0033] In this embodiment, due to different geological conditions, some chemical reagents are added to the drag reducer to improve the performance of the drag reducer, so an auxiliary agent injection mechanism 7 is provided to add chemical reagents, and the liquid output port of the auxiliary agent injection mechanism 7 is connected to the liquid inlet of the powder-liquid mixing mechanism 4. Specifically, the auxiliary agent injection mechanism 7 can be provided as a chemical injection pump or the like.

[0034] Furthermore, if Figure 2 As shown, the system also includes: The powder recovery mechanism 8 is connected to the feeding mechanism 1 and the feeding mechanism 2 and is used for recovering the drag reducing agent powder.

[0035] In this embodiment, since the drag reducer powder is transported by the feeding mechanism 1 and the feeding mechanism 2 in this scheme, after the drag reducer powder is transported, some drag reducer powder may still exist in the structure inside the feeding mechanism 1 and the feeding mechanism 2 or in the air. In order to reduce the waste of raw materials and reduce the dust problem during operation, after the drag reducer powder is transported, the feeding mechanism 1 and the feeding mechanism 2 are controlled to stop working. At the same time, the powder recovery mechanism 8 is controlled to work to recover the drag reducer powder to reduce the dust during operation. Specifically, the powder recovery mechanism 8 can be set as a wind dust removal, wet dust removal, sedimentation dust removal and other devices, for example, a spiral dust collector is used for collection. Specifically, the powder can be recovered during the feeding process, or after the feeding is completed. The drag reducer powder collected by the powder recovery mechanism 8 can be transported to the feeding mechanism 1 through a pipeline.

[0036] Furthermore, if Figure 3 As shown, the feeding mechanism 1 comprises: A blower 11, wherein the air outlet of the blower 11 is connected to the feeding mechanism 2 via a feeding pipe 12; A discharge platform 13 is used to contain drag reducer powder, and a discharge channel is provided inside the discharge platform 13, and the discharge channel is connected to the feed pipe 12; The vacuum feeder 14 is connected to the feeding mechanism 2 and is used to form a vacuum negative pressure environment in the feeding pipeline 12 to realize the transportation of the drag reducing agent powder.

[0037] In this embodiment, the feeding mechanism 1 specifically includes: a blower 11, the blower 11 is connected to the feeding mechanism 2 through a feeding pipe 12, and a discharge platform 13 is provided to accommodate and store the drag reducer powder, a discharge channel is provided at the bottom of the discharge platform 13, a discharge valve is provided on the discharge channel, and the discharge channel is connected to the feeding pipe 12, and at the same time, a vacuum feeder 14 is provided to form a vacuum negative pressure state in the feeding pipe 12, and when the blower 11 is working, air is supplied to the feeding pipe 12, and the drag reducer powder is discharged from the discharge channel and moves with the wind, so as to realize the stable feeding of the drag reducer powder. Furthermore, the conveying speed of the drag reducer powder can be controlled by controlling the operating power of the blower 11 and the vacuum feeder 14, and controlling the opening of the discharge valve.

[0038] In addition, the unloading platform 13 can be used for lifting and transporting unloading, vibration or tapping of material bags to assist unloading, and negative pressure suction feeding.

[0039] Furthermore, if Figure 3 As shown, the feeding mechanism 1 also includes: The gas filtering mechanism 15 is disposed at the air inlet of the blower 11 and is used for filtering the gas entering the blower 11 .

[0040] In this embodiment, in order to ensure the quality of the drag reducer and reduce impurities, a gas filter mechanism 15 is provided for filtering the gas used to transport the material, so a gas filter mechanism 15 is provided at the air inlet of the blower 11 to filter the gas, so as to improve the quality of the gas and reduce impurities. The gas filter mechanism 15 can be provided as a gas purifier, a multi-layer filter sponge layer, etc.

[0041] Furthermore, if Figure 3 As shown, the feeding mechanism 2 comprises: A silo 21, connected to the discharge port of the feeding mechanism 1, for collecting the drag reducing agent powder; The feeder 22 has a feed port connected to the discharge port of the silo 21 , and the discharge port of the feeder 22 is connected to the feed port of the powder-liquid mixing mechanism 4 , for uniformly supplying the drag reducer powder to the powder-liquid mixing mechanism 4 .

[0042] In this embodiment, a silo 21 is provided to collect and buffer the drag reducer powder conveyed, and the drag reducer powder entering the silo 21 falls into the feeder 22 under the action of gravity, and the feeder 22 uniformly and quantitatively conveys the drag reducer powder to ensure the uniformity of stirring. The feeder 22 can be provided as a screw feeder, and the silo 21 includes but is not limited to the function of vibration or stirring anti-bridging and material weighing, such as connecting through a spring, so that the silo 21 itself is in a vibrating state, and the discharge port of the silo 21 is connected to the feed port of the feeder 22 through a soft pipe such as a bellows or a telescopic pipe, so that the vibration of the silo 21 is ensured, and the transportation of the material is not affected, and the sealing of the connection position is ensured.

[0043] Furthermore, if Figure 3 As shown, the water solvent supply mechanism 3 includes: A water pump 31, wherein the water outlet of the water pump 31 is connected to the liquid inlet of the powder-liquid mixing mechanism 4 through a liquid delivery pipe 32; The liquid filtering mechanism 33 is disposed at the water inlet of the water pump 31 and is used for filtering the liquid entering the water pump 31 .

[0044] In this embodiment, the water solvent is injected into the liquid delivery pipe 32 through the pumping action of the water pump 31 and delivered to the powder-liquid mixing mechanism 4. In order to reduce impurities in the water solvent, a liquid filtering mechanism 33 is provided at the water inlet of the water pump 31 to filter the water to improve the quality. Specifically, the liquid filtering mechanism 33 can be provided as a multi-layer filter cloth. A water solvent storage tank is provided correspondingly, and the water inlet of the water pump 31 is connected to a pipeline to draw the water solvent from the water solvent storage tank.

[0045] Furthermore, if Figure 3 As shown, the water solvent supply mechanism 3 also includes: The drainage pipe 34 is connected to the liquid delivery pipe 32 and is used for adjusting the flow of the liquid delivery pipe 32 and for emergency drainage.

[0046] Specifically, in this embodiment, in addition to controlling the flow rate of the aqueous solvent by the operating power of the water pump 31, a drainage pipe 34 is correspondingly arranged on the liquid delivery pipe 32 as a redundant setting for flow control. At the same time, drainage is achieved in emergency situations to protect the device.

[0047] Furthermore, if Figure 3 As shown, the output mechanism 5 includes: A material barrel 51, connected to the discharge port of the powder-liquid mixing mechanism 4, for caching and transferring the drag reducing agent; The output pump 52 has a feed port connected to a discharge port of the barrel 51 for outputting the drag reducing agent to the outside.

[0048] In this embodiment, since the prepared drag reducer needs to be transported to the fracturing operation and cannot be quickly transported and used, a barrel 51 is provided to transfer, cache and collect the prepared drag reducer. After shearing and grinding by the powder-liquid mixing mechanism 4, the drag reducer is prepared, and the prepared drag reducer is input into the barrel 51 for temporary storage, buffering and transfer, and the drag reducer in the barrel 51 is synchronously and continuously transported to the fracturing operation by the provided output pump 52. The output pump is a special pump for high-viscosity liquids; and the drag reducer stays in the barrel 51, and is stirred by the stirring structure provided in the barrel 51 to keep the drag reducer in a flowing and low-viscosity state.

[0049] Specifically, Figure 3 As shown, in a specific embodiment, the above-mentioned various mechanisms are connected by pipelines, wherein one end of the feed pipeline 12 is connected to the silo 21 to transport the drag reducer powder into the silo 21; the air inlet of the powder recovery mechanism 8 is connected to the feed pipeline 12 and the silo 21 to realize the recovery of the drag reducer powder from the feed pipeline 12 and the silo 21; the vacuum loader 14 is connected to the silo 21, thereby realizing vacuum negative pressure in the feed pipeline 12 and the silo 21 to realize powder transportation; the inert gas supply mechanism 6 is connected to the silo 21, the feeder 22 (or the pipeline of the feed port or the discharge port of the feeder 22), and the powder-liquid mixing mechanism 4 to supply inert gas to realize air isolation and protection.

[0050] In addition, in order to achieve process control and equipment protection during the preparation of the drag reducer, a feed control valve 901 is provided on the feed pipeline 12 to control the flow of the pipeline; a drop control valve 902 is provided on the pipeline between the discharge port of the silo 21 and the feed port of the feeder 22 to control the falling amount of the drag reducer powder; a feed control valve 903 is provided between the discharge port of the feeder 22 and the powder-liquid mixing mechanism 4 to control the on-off of the pipeline; an output control valve 904 is provided at the discharge port of the output pump 52 to control the output flow of the drag reducer and the on-off of the pipeline; an overflow pipe is provided between the material barrel 51 and the output pump 52, and an overflow control valve 905 is provided on the overflow pipe to control the liquid level of the drag reducer in the material barrel 51. When the flow rate is greater than the set value, the overflow control valve 905 is used to control the overflow pipe to discharge the liquid; a barrel control valve 906 is provided between the barrel 51 and the overflow pipe to control the on-off and flow rate of the pipe; a water control valve 907 is provided on the liquid delivery pipe 32 to control the flow rate of the pipe, and the water control valve 907 is located between the drainage pipe 34 and the powder-liquid mixing mechanism 4; a flow control valve 908 is provided on the drainage pipe 34 to control the on-off of the drainage pipe 34; a density meter 909 is provided between the barrel 51 and the overflow pipe to measure the density of the drag reducer; a flow meter 910 is provided on the liquid delivery pipe 32 to collect the flow rate of the pipe and determine the flow rate of the aqueous solvent entering the powder-liquid mixing mechanism 4. The flow meter can monitor the real-time flow rate and the accumulated flow rate to realize data monitoring.

[0051] In addition, if Figure 4 As shown, the sensor modules set in the system include: temperature sensor, pressure sensor, mass sensor, liquid level sensor, hydrogen sulfide sensor, material level indicator, flow meter, density meter and other various sensor and metering tools to perform system control on the signals collected, including data collection and control signal output; the electronic control module is to perform system control on the motors, controllers and electronically controlled valves connected to the pipelines of all working devices used in the rapid preparation system of fracturing fluid drag reducer, including receiving control signals, switch start and stop, servo control, linkage control, etc.; the power module mainly includes the generator used in the rapid preparation system of fracturing fluid drag reducer, and performs system monitoring on the generator (or directly uses the power supply of the power grid); the central control module uniformly controls the sensor module, the electronic control module and the power module, collects the operating status signal of the rapid preparation system of fracturing fluid drag reducer through the sensor module, issues control and adjustment commands to the electronic control module, and the electronic control module executes the control and adjustment commands on the devices in the rapid preparation system of fracturing fluid drag reducer, and the sensor module monitors in real time, thereby forming a complete linkage closed-loop control to realize the automation, high precision and adjustable operation of the rapid preparation system of fracturing fluid drag reducer.

[0052] like Figure 5 As shown, this embodiment also provides a method for rapidly preparing a fracturing fluid drag reducer, which is applied to the aforementioned system for rapidly preparing a fracturing fluid drag reducer, and the method comprises: Step 1: Control the powder-liquid mixing mechanism to shear and grind at a set speed; Step 2: Control the feeding mechanism and the feeding mechanism to continuously and quantitatively transport the drag reducer powder to the powder-liquid mixing mechanism, and at the same time, control the water solvent supply mechanism to continuously and quantitatively transport the water solvent to the powder-liquid mixing mechanism; Step 3: Control the output mechanism to continuously discharge the fracturing fluid drag reducer for on-site fracturing.

[0053] Specifically, before starting to convey the drag reducer powder and the aqueous solvent, the powder-liquid mixing mechanism is controlled to start stirring to ensure that the drag reducer powder and the aqueous solvent can be sheared and ground after entering the powder-liquid mixing mechanism, and the drag reducer powder and the aqueous solvent are continuously and evenly supplied to the powder-liquid mixing mechanism, and after being sheared and ground by the powder-liquid mixing mechanism, they are output to the outside through the output mechanism, thereby realizing the continuous preparation and continuous supply of the drag reducer.

[0054] Furthermore, the method further comprises: While controlling the feeding mechanism and the material feeding mechanism to start working, the powder recovery mechanism is controlled to operate to recover the drag reducing agent powder; After the fracturing fluid drag reducer is exhausted, the inert gas supply mechanism is controlled to supply inert gas to the feeding mechanism and the powder-liquid mixing mechanism to perform air sealing.

[0055] Specifically, during the process of supplying the drag reducer powder, there is a certain amount of drag reducer powder in the air inside the equipment. In order to save raw materials, protect the environment, and realize raw material recovery, during the transportation of the drag reducer powder, the powder recovery mechanism 8 is controlled to work and recover the remaining drag reducer powder inside the feeding mechanism 1 and the feeding mechanism 2.

[0056] After the supply of drag reducer powder and aqueous solvent is completed, the preparation work is completed, and after all the drag reducers in the powder-liquid mixing mechanism 4 are buffered in the material barrel 51, the drag reducer is output to the outside by the output pump 52. After the drag reducer in the powder-liquid mixing mechanism 4 is emptied, the discharge port of the powder-liquid mixing mechanism 4 is closed, and then the inert gas supply mechanism 6 is controlled to inject a certain amount of inert gas into the powder-liquid mixing mechanism 4 to achieve air isolation, protect the internal structure of the powder-liquid mixing mechanism 4, avoid rust, and reduce the service life.

[0057] In another embodiment, the powder-liquid mixing mechanism 4 performs high-speed shearing and grinding at a set speed to ensure that the drag reducer powder and the water solvent are evenly mixed. In this process, the inert gas supply mechanism 6 supplies inert gas to the powder-liquid mixing mechanism 4, so that the inside of the powder-liquid mixing mechanism 4 is in an air-isolated state during the stirring process, thereby ensuring the preparation quality of the drag reducer.

[0058] In another embodiment, clean water can be first supplied to the powder-liquid mixing mechanism 4 through the water solvent supply mechanism 3, and the powder-liquid mixing mechanism 4 can be controlled to stir and clean, so as to realize the internal cleaning of the powder-liquid mixing mechanism 4. After multiple cleanings, the interior is clean and free of stains, the water vapor is removed, and then the discharge port of the powder-liquid mixing mechanism 4 is closed, and then the inert gas supply mechanism 6 is controlled to inject a certain amount of inert gas into the powder-liquid mixing mechanism 4 to realize air isolation, protect the internal structure of the powder-liquid mixing mechanism 4, avoid rust, and reduce the service life.

[0059] Through field testing, a certain brand of fracturing fluid drag reducer was used to mix with water solvent on site. According to the technical method of the present invention, a quantitative powder and water solvent that were measured in advance were input, and after system dispersion treatment, a qualified mixed liquid could be output within 5-10 seconds. Then, after 20 seconds, it was transported to the sand mixing truck and mixed with sand to meet the requirements of the fracturing operation and could be used for fracturing in the well. It can be seen from the test that the system and method for rapid preparation of fracturing fluid drag reducer described in the present invention realizes the rapid mixing of fracturing fluid drag reducer at the fracturing site, realizes ready-to-use, and the effect and speed far exceed the traditional fracturing fluid drag reducer mixing process, providing more powerful technical support for the supply and technical process of fracturing fluid drag reducer in fracturing operations. The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0061] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0062] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A rapid preparation system for fracturing fluid drag reducer, characterized in that: The system comprises: A feeding mechanism (1) is used to supply the stored drag reducing agent powder to the feeding mechanism (2); A feeding mechanism (2), wherein the feeding port of the feeding mechanism (2) is connected to the discharging port of the feeding mechanism (1), and the discharging port of the feeding mechanism (2) is connected to the feeding port of the powder-liquid mixing mechanism (4), and is used to uniformly supply the drag reducing agent powder to the powder-liquid mixing mechanism (4); A water solvent supply mechanism (3) is connected to a liquid inlet of the powder-liquid mixing mechanism (4) and is used to supply the water solvent to the powder-liquid mixing mechanism (4); A powder-liquid mixing mechanism (4) is used to mix the drag reducer powder and the water solvent to form the drag reducer; An output mechanism (5) connected to the discharge port of the powder-liquid mixing mechanism (4) and used for outputting the drag reducing agent to the outside; An inert gas supply mechanism (6) is connected to the feeding mechanism (2) and the powder-liquid mixing mechanism (4) and is used to supply inert gas into the feeding mechanism (2) and the powder-liquid mixing mechanism (4) to isolate the air.

2. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The system further comprises: An auxiliary agent injection mechanism (7) is connected to the liquid inlet of the powder-liquid mixing mechanism (4) and is used to inject auxiliary agents into the powder-liquid mixing mechanism (4).

3. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The system further comprises: A powder recovery mechanism (8) is connected to the feeding mechanism (1) and the feeding mechanism (2) and is used to recover the drag reducing agent powder.

4. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The feeding mechanism (1) comprises: A blower (11), wherein an air outlet of the blower (11) is connected to the feeding mechanism (2) via a feeding pipe (12); A discharge platform (13) is used to accommodate drag reducing agent powder, wherein a discharge channel is provided inside the discharge platform (13), and the discharge channel is connected to the feed pipe (12); The vacuum feeder (14) is connected to the feeding mechanism (2) and is used to form a vacuum negative pressure environment in the feeding pipeline (12) to achieve the transportation of the drag reducing agent powder.

5. The rapid preparation system of fracturing fluid drag reducer according to claim 4, characterized in that: The feeding mechanism (1) further comprises: A gas filtering mechanism (15) is arranged at the air inlet of the blower (11) and is used to filter the gas entering the blower (11).

6. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The feeding mechanism (2) comprises: A silo (21) connected to the discharge port of the feeding mechanism (1) and used for collecting the drag reducing agent powder; A feeder (22), wherein the feed port of the feeder (22) is connected to the discharge port of the silo (21), and the discharge port of the feeder (22) is connected to the feed port of the powder-liquid mixing mechanism (4), and is used to uniformly supply the drag reducer powder to the powder-liquid mixing mechanism (4).

7. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The water solvent supply mechanism (3) comprises: A water pump (31), wherein a water outlet of the water pump (31) is connected to a liquid inlet of the powder-liquid mixing mechanism (4) via a liquid delivery pipe (32); The liquid filtering mechanism (33) is arranged at the water inlet of the water pump (31) and is used to filter the liquid entering the water pump (31).

8. The rapid preparation system of fracturing fluid drag reducer according to claim 7, characterized in that: The water solvent supply mechanism (3) further comprises: A drainage pipeline (34) is connected to the liquid delivery pipeline (32) and is used to adjust the flow rate of the liquid delivery pipeline (32) and to drain water in an emergency.

9. The rapid preparation system of fracturing fluid drag reducer according to claim 1, characterized in that: The output mechanism (5) comprises: A material barrel (51) connected to the discharge port of the powder-liquid mixing mechanism (4) and used for caching and transferring the drag reducing agent; An output pump (52), wherein the feed port of the output pump (52) is connected to the discharge port of the material barrel (51) and is used to output the drag reducing agent to the outside.

10. A method for rapidly preparing a fracturing fluid drag reducer, applied to a system for rapidly preparing a fracturing fluid drag reducer according to any one of claims 1 to 9, characterized in that: The method comprises: Control the powder-liquid mixing mechanism to shear and grind at the set speed; Control the feeding mechanism and the material feeding mechanism to continuously and quantitatively transport the drag reducer powder to the powder-liquid mixing mechanism, and at the same time, control the water solvent supply mechanism to continuously and quantitatively transport the water solvent to the powder-liquid mixing mechanism; The output mechanism is controlled to work and continuously discharge the fracturing fluid drag reducer to the outside for use in on-site fracturing.

11. The method for rapidly preparing a fracturing fluid drag reducer according to claim 10, characterized in that: The method further comprises: While controlling the feeding mechanism and the material feeding mechanism to start working, the powder recovery mechanism is controlled to operate to recover the drag reducing agent powder; After the fracturing fluid drag reducer is exhausted, the inert gas supply mechanism is controlled to supply inert gas to the feeding mechanism and the powder-liquid mixing mechanism to perform air sealing.

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