Anti-blocking material mixing and fracturing powder pry

Abstract

The utility model relates to the technical field of petroleum engineering fracturing operation equipment, concretely relates to a kind of anti-blocking mixed material fracturing powder crowbar, including conveying pipeline, for conveying powder and liquid;Powder tank, powder tank is communicated with conveying pipeline by gas lock;Mixing pump, mixing pump is set in the lower end of powder gas lock;The utility model effectively solves the problems, such as poor mixing uniformity, low measurement accuracy, insufficient automation of existing fracturing powder crowbar, significantly improves the efficiency and safety of fracturing operation.

Description

Technical Field

[0001] This utility model relates to the technical field of fracturing equipment for petroleum engineering, specifically to a fracturing powder skid for preventing blockage and mixing of materials. Background Technology

[0002] In unconventional oil and gas extraction such as shale gas and tight oil, fracturing operations require the injection of high-concentration slurry (containing proppant or polymers) into the formation. The performance of the mixing equipment directly affects the fracturing effect. Currently, fracturing skid-mounted equipment generally faces the following problems in material conveying and mixing:

[0003] 1. Insufficient mixing uniformity: When using open spiral feeding or Venturi feeding, the powder is prone to absorbing moisture and clumping, and the feeding speed is unstable. Due to the lack of a closed feeding structure with air-material isolation, the introduction of air can easily lead to the "fish-eye" phenomenon (powder clumping without full dissolution), resulting in an out-of-control powder-liquid ratio in the mixture, unstable viscosity during fracturing, and affecting the construction effect.

[0004] 2. Low accuracy of powder metering: Relying on manual weighing or non-modular storage tanks, the loading efficiency is low and the metering error is large, which cannot meet the precise requirements of different fracturing processes for the formulation (such as when the polymer concentration fluctuates by more than ±5%, the sand-carrying capacity of the fracturing fluid decreases significantly).

[0005] 3. Low level of automation: Key parameters (such as liquid flow rate and powder feeding speed) are cumbersome to operate and have a slow response, making it difficult to adapt to the dynamic adjustment requirements of complex fracturing conditions. Often, the construction efficiency is reduced or the equipment is blocked due to the deviation of the mixing ratio.

[0006] To address the above problems, there is an urgent need to propose a solution for preventing the mixing and fracturing of materials using a skid. Summary of the Invention

[0007] In view of this, the purpose of this utility model is to propose an anti-clogging fracturing powder skid to achieve accurate metering, efficient mixing, and anti-clogging conveying of powder and liquid, thereby meeting the requirements of fracturing operations for uniformity of mixture, proportioning accuracy, and automated control.

[0008] To achieve the above objectives, this utility model provides an anti-clogging fracturing powder skid, comprising:

[0009] Conveying pipelines are used to transport powders and liquids;

[0010] The powder silo is connected to the conveying pipeline via an airlock.

[0011] The material conveying pipeline at the discharge end of the dispersant and the airlock is connected to the dispersant.

[0012] A mixing pump is installed at the discharge end of the mixing pump conveying pipeline and connected to it.

[0013] Preferably, the conveying pipeline has a three-way pipe structure, with a feed end, a liquid inlet end, and a discharge end;

[0014] The inlet and outlet ends of the conveying pipeline are arranged coaxially to form a conveying channel;

[0015] The feed end of the conveying pipeline is connected to the powder tank via an airlock.

[0016] Preferably, the inlet end of the delivery pipeline is equipped with a water inlet valve.

[0017] Preferably, the feed inlet of the conveying pipeline is connected to a flushing pump.

[0018] Preferably, the airlock adopts a star-shaped impeller structure with an impeller diameter of φ100mm and 8 blades.

[0019] Preferably, the mixing pump is a gear pump of model KCB-83.3.

[0020] Preferably, the mixing pump is an open impeller centrifugal pump with an impeller diameter of φ150~200mm and 3~5 blades.

[0021] Preferably, the fracturing skid is equipped with a PLC control system.

[0022] The beneficial effects of this utility model are:

[0023] This invention effectively solves the problems of poor mixing uniformity, material agglomeration, and pipeline blockage in existing fracturing powder skids. It uses a disperser to stir the powder, breaking up agglomerated powder, and uses a flushing pump to backwash and clean the pipelines at the corresponding locations to prevent pipeline blockage. Furthermore, it improves metering accuracy and automation, significantly enhancing the efficiency and safety of fracturing operations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart of the present invention;

[0026] Figure 2 This is a schematic diagram of the process of this utility model;

[0027] Figure 3 This is a partial structural diagram of the present invention. Figure 1 ;

[0028] Figure 4 This is a partial structural diagram of the present invention. Figure 2 ;

[0029] The numbers on the map are:

[0030] 1-Powder silo; 11-Airlock; 12-Disperser; 13-Pneumatic valve; 2-Flushing pump; 3-Conveying pipeline; 31-Water inlet valve; 32-Mixing pump. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] This utility model proposes a skid for preventing clogged mixing and fracturing powder, such as... Figures 1 to 4 As shown,

[0034] Powder tank 1: Used to store powders (such as quartz sand, polymer), and connected to the conveying pipeline 3 through the airlock 11;

[0035] The airlock 11 adopts a star-shaped impeller structure (impeller diameter φ100mm, number of blades 8), with a gap between the blades and the shell ≤0.1mm, to achieve air-material isolation. By periodically opening and closing the rotating valve plate, the powder is uniformly transported to the conveying pipeline 3 at the set flow rate, with a metering error ≤±2%.

[0036] The disperser 12 is connected to the conveying pipeline 3. It adopts a turbine stirring structure to stir and disperse materials at high speed, so as to avoid the powder from being stuck due to gravity or friction.

[0037] The flushing pump 2 is connected to the conveying pipeline 3. When the machine is stopped, it can inject liquid water to backflush and clean the residual powder on the inner wall of the pipeline, reducing the frequency of blockage by more than 90%.

[0038] The conveying pipeline 3 has a three-way pipe structure, with a feed end (connected to the airlock 11), a liquid inlet end (connected to the liquid source) and a discharge end.

[0039] The inlet valve 31 is located at the liquid inlet end of the delivery pipeline 3 to control the flow rate of the liquid (base liquid or clean water);

[0040] Further:

[0041] The mixing pump is an open-type impeller centrifugal pump (impeller diameter φ150-200mm, 3-5 blades), equipped with a pneumatic valve 13 at the lower end, pumping the mixture at a flow rate of 0.5-2m³ / min. The open impeller design (flow channel width ≥20mm) avoids excessive shearing (shear rate ≤5×10⁻⁶). 4 s⁻¹), protecting shear-sensitive materials such as polymers (viscosity loss ≤5%).

[0042] The PLC control system is integrated into the skid and monitors parameters such as the speed of the airlock 11, the operating frequency of the mixing pump 32 motor, the inlet water flow, and the frequency of the dispersing motor in real time.

[0043] Implementation process:

[0044] 1. Material preparation: Powder is stored in powder tank 1, and liquid is controlled by water inlet valve 31 and mixing pump 32. The base liquid can be premixed with additives (such as drag reducers).

[0045] 2. Mixing process: The airlock 11 feeds the material at the speed set by the PLC (50-300rpm), and the mixing pump 32 establishes a negative pressure of -0.06MPa. The powder and liquid are initially mixed in the conveying pipeline 3, for example (gas-liquid-solid volume ratio 1:2:1).

[0046] 3. The mixed fluid is pumped to the sand mixing truck, and after being divided and recombined by the spiral blades, it forms a uniformly dispersed emulsion (particle size D90≤100μm).

[0047] 4. Maintenance and cleaning: After the operation is completed, the automatic control system is shut down and the flushing pump 2 is automatically started to flush the pipeline with a pump pressure of 0.6MPa to remove residual powder, thus avoiding the traditional work of stopping the machine to disassemble and clean.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0049] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A skid for preventing clogged mixing and fracturing powder, characterized in that, include: The conveying pipeline (3) is used to convey powder and liquid; Powder tank (1), the powder tank (1) is connected to the conveying pipeline (3) through the airlock (11); Disperser (12), the feed end of the disperser (12) is connected to the discharge end of the airlock (11); Mixing pump (32) is located at the lower end of powder airlock (11).

2. The anti-clogging fracturing skid according to claim 1, characterized in that, The conveying pipeline (3) has a three-way pipe structure, with a feed end, a liquid inlet end and a discharge end; The inlet and outlet ends of the conveying pipeline (3) are coaxially arranged to form a conveying channel; The feed end of the conveying pipeline (3) is connected to the powder tank (1) through an airlock (11).

3. The anti-clogging fracturing skid according to claim 2, characterized in that, The inlet end of the delivery pipeline (3) is equipped with a water inlet valve (31).

4. The anti-clogging fracturing skid according to claim 2, characterized in that, The feed inlet of the conveying pipeline (3) is connected to a flushing pump (2).

5. The anti-clogging fracturing skid according to claim 1, characterized in that, The airlock (11) adopts a star-shaped impeller structure with an impeller diameter of φ100mm and 8 blades.

6. The anti-clogging fracturing skid according to claim 5, characterized in that, The mixing pump (32) is a gear pump of model KCB-83.

3.

7. The anti-clogging fracturing skid according to claim 1, characterized in that, The dispersant (12) adopts a turbine stirring structure.

8. The anti-clogging fracturing skid according to claim 1, characterized in that, The mixing pump (32) is an open impeller centrifugal pump with an impeller diameter of φ150~200mm and 3~5 blades.

9. A skid for preventing clogged mixing and fracturing powder according to any one of claims 1-8, characterized in that, The fracturing skid is equipped with a PLC control system.

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