Solid powder adding device

Abstract

The utility model provides a solid powder adding device which is characterized in that the solid powder adding device comprises a mechanical unit and an intelligent control unit, the mechanical unit comprises a solid phase storage tank, a venturi mixer and a slurry pump, a venturi mixer funnel is arranged above the venturi mixer, and the slurry pump is arranged above the venturi mixer funnel. A venturi mixer electric butterfly valve is arranged between the venturi mixer funnel and the venturi mixer, an outlet of the solid phase storage tank is in butt joint with the venturi mixer funnel, the slurry pump is communicated with one end of the venturi mixer, a suction inlet electric butterfly valve is arranged between the slurry pump and the venturi mixer, and the suction inlet electric butterfly valve is communicated with the outlet of the venturi mixer. The intelligent control unit receives a flow signal provided by the well cementation pump and controls the solid phase storage tank to output the solid powder with the corresponding weight. According to the control mode, the rotating speed of the variable-frequency screw conveyor can be adjusted in real time according to the flow signal of the well cementation pump, so that the adding amount of the solid powder is accurately controlled, excessive or insufficient solid powder is avoided, and the adding precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of cementing technology, and in particular to a solid powder addition device. Background Technology

[0002] Cementing is a crucial step in oil and gas well drilling. Its primary purpose is to isolate oil, gas, and water layers within the wellbore, protect the casing, extend well life, and increase oil and gas production. During drilling, multiple cementing operations are typically required, especially for production wells and deep exploration wells, which may require four to five cementing operations. Cementing technology involves running high-quality steel tubing and filling the annulus between the wellbore and the tubing with cement. Cement slurry, a vital material in cementing technology, is also extremely important. It is made by mixing cement and water in a specific ratio, adding admixtures, and then hardening downhole into a cement stone with a certain compressive strength and permeability. Cement slurry plays a vital role in oil and gas well drilling, and through scientific design and continuous technological innovation, it effectively ensures the safe operation and efficient production of oil and gas wells. Currently, the main steps for adding cement slurry additives are: 1. Calculating the required amount of additive; 2. Weighing the calculated amount of additive manually and pouring it into the mud pit; 3. Mixing with a mixer in the mud pit before use. The following problems are encountered during the addition process: 1. Calculating the amount of additive is tedious; 2. The dosage in the cement slurry is large; 3. The weighing process is tedious; 4. Some additives are powdery and generate a lot of dust when poured into the mud pit; 5. Uneven mixing leads to poor performance of the cement slurry; 6. Site limitations and other issues. Utility Model Content

[0003] The purpose of this invention is to provide a solid powder adding device to improve the automation level of solid powder adding in cementing operations.

[0004] This utility model is achieved using the following technical solution: a solid powder addition device, characterized in that it includes a mechanical unit and an intelligent control unit. The mechanical unit includes a solid phase storage tank, a Venturi mixer, and a mud pump. A Venturi mixer funnel is provided above the Venturi mixer. An electric butterfly valve for the Venturi mixer is provided between the Venturi mixer funnel and the Venturi mixer. The outlet of the solid phase storage tank is connected to the Venturi mixer funnel. The mud pump is connected to one end of the Venturi mixer. An electric butterfly valve for the suction port is provided between the mud pump and the Venturi mixer. The intelligent control unit receives the flow signal provided by the cementing pump and controls the solid phase storage tank to output a corresponding weight of solid powder.

[0005] Furthermore, the intelligent control unit includes a human-machine interface and a control cabinet, and both the mechanical unit and the intelligent control unit are housed within the skid.

[0006] Furthermore, the outlet of the solid storage tank is equipped with a variable frequency screw conveyor, which is used to input the solid powder in the solid storage tank into the venturi mixer funnel, where cement slurry and solid additives are sprayed and mixed.

[0007] Furthermore, the control cabinet receives the flow signal from the cementing pump, processes it through the PLC inside the control cabinet, and converts it into the quality requirements of the solid additive. By changing the speed of the variable frequency screw conveyor to match the constantly changing flow signal of the cementing pump, the dynamic addition of the solid powder additive is realized.

[0008] Furthermore, a vibration motor is installed on the solid storage tank to set a time interval for vibration, thereby improving the density of the solid additive.

[0009] Furthermore, a level switch is installed on the solid storage tank to automatically alarm when there is a lack of solid additives in the tank. At the same time, four weight sensors are installed at fixed positions on the solid storage tank to process data through the PLC in the control cabinet and verify the solid additives output by the variable frequency screw conveyor.

[0010] Furthermore, the electrical components of the intelligent control unit are all installed inside the control cabinet, and the operation panel is located at the human-machine interface.

[0011] The solid powder adding device described in this utility model has the following beneficial effects:

[0012] By combining a variable frequency screw conveyor with PLC control, dynamic addition of solid powder additives can be achieved. This control method can adjust the speed of the variable frequency screw conveyor in real time according to the flow signal of the cementing pump, thereby precisely controlling the amount of solid powder added, avoiding over- or under-addition, and improving the accuracy of addition.

[0013] The use of variable frequency screw conveyors also improves the addition efficiency, allowing for rapid response to changes in flow signals and timely adjustment of the addition amount, ensuring rapid and uniform mixing of cement slurry and solid additives. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of 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. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 A front view of a solid powder adding device;

[0016] Figure 2 A side view of a solid powder adding device;

[0017] In the diagram, 1-solid storage tank, 2-skid, 3-variable frequency screw conveyor, 4-Venturi mixer, 5-Venturi mixer electric butterfly valve, 6-Venturi mixer funnel, 7-human-machine interface, 8-control cabinet, 9-suction inlet electric butterfly valve, 10-weight sensor, 11-vibration motor, 12-mud pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figure 1-2 As shown, a solid powder adding device includes a mechanical unit and an intelligent control unit. The mechanical unit mainly includes a solid storage tank 1, a Venturi mixer 4, and a mud pump 12. A Venturi mixer funnel 6 is installed above the Venturi mixer 4, and an electric butterfly valve 5 is installed between the Venturi mixer funnel 6 and the Venturi mixer 4. The outlet of the solid storage tank 1 is connected to the Venturi mixer funnel 6. The mud pump 12 is connected to one end of the Venturi mixer 4, and an electric butterfly valve 9 is installed between the mud pump 12 and the Venturi mixer 4. The intelligent control unit includes a human-machine interface 7 and a control cabinet 8. Both the mechanical unit and the intelligent control unit are housed within a skid 2.

[0021] Solid powder is stored in solid phase storage tank 1. When solid powder needs to be added, an external cementing pump provides a flow signal to the solid additive device. Upon receiving the signal, control cabinet 8 opens the suction port electric butterfly valve 9 and mud pump 12, allowing mud pump 12 to draw in cement slurry from the mud pit and discharge it into the mud pit, allowing the cement slurry to circulate internally. Once mud pump 12 is fully open, the Venturi mixer electric butterfly valve 5 is opened, and the solid powder in solid phase storage tank 1 is fed into the Venturi mixer funnel 6 via a variable frequency screw conveyor 3. The cement slurry and solid additives are sprayed and mixed in the Venturi mixer 4, enabling rapid and uniform mixing of the cement slurry and solid additives, improving the performance of the cement slurry. The mixed cement slurry returns to the cementing circulation tank, awaiting cementing operations.

[0022] The control cabinet 8 of the additive device receives the flow signal from the cementing pump. After processing by the PLC within the control cabinet 8, it is converted into the mass requirement of the solid additive. Since the amount of solid additive output per revolution of the variable frequency screw conveyor 3 is relatively stable, the dynamic addition of solid powder additive is achieved by changing the rotation speed of the variable frequency screw conveyor 3 to match the constantly changing flow signal of the cementing pump (when the flow signal of the cementing pump increases, the rotation speed of the variable frequency screw conveyor 3 can be increased to increase the amount of solid powder additive added; when the flow signal of the cementing pump decreases, the rotation speed of the variable frequency screw conveyor 3 can be decreased to reduce the amount of solid powder additive added). A vibration motor 11 is installed on the solid phase storage tank 1, which can be set to vibrate at time intervals to improve the density of the solid additive. A material level switch is installed on the solid phase storage tank 1, which can automatically alarm when the tank is low on solid additive. At the same time, four weight sensors 10 are installed at fixed positions on the solid phase storage tank 1. The signal from the weight sensor 10 is processed by the PLC in the control cabinet 8 to verify the solid additive output of the variable frequency screw conveyor 3, thereby accurately controlling the amount of solid powder added and improving the performance of the cementing slurry.

[0023] The electrical components of the equipment are housed in the control cabinet 8, and the operation panels are all located on the human-machine interface 7, making it more intelligent and convenient. The entire equipment is mounted on the skid 2, making it easy to use and requiring minimal floor space.

[0024] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A solid powder adding device, characterized in that, The system includes a mechanical unit and an intelligent control unit. The mechanical unit includes a solid storage tank (1), a Venturi mixer (4), and a mud pump (12). A Venturi mixer funnel (6) is provided above the Venturi mixer (4). A Venturi mixer electric butterfly valve (5) is provided between the Venturi mixer funnel (6) and the Venturi mixer (4). The outlet of the solid storage tank (1) is connected to the Venturi mixer funnel (6). The mud pump (12) is connected to one end of the Venturi mixer (4). A suction port electric butterfly valve (9) is provided between the mud pump (12) and the Venturi mixer (4). The intelligent control unit receives the flow signal provided by the cementing pump and controls the solid storage tank (1) to output a corresponding weight of solid powder.

2. The solid powder adding device according to claim 1, characterized in that, The intelligent control unit includes a human-machine interface (7) and a control cabinet (8), and both the mechanical unit and the intelligent control unit are installed inside the skid (2).

3. A solid powder adding device according to claim 2, characterized in that, The outlet of the solid storage tank (1) is equipped with a variable frequency screw conveyor (3), which is used to input the solid powder in the solid storage tank (1) into the Venturi mixer funnel (6), and the cement slurry and solid additives are sprayed and mixed in the Venturi mixer (4).

4. A solid powder adding device according to claim 3, characterized in that, The control cabinet (8) receives the flow signal of the cementing pump. After processing by the PLC in the control cabinet (8), it is converted into the quality requirements of the solid additive. By changing the speed of the variable frequency screw conveyor (3) to match the constantly changing flow signal of the cementing pump, the dynamic addition of solid powder additive is realized.

5. A solid powder adding device according to claim 1, characterized in that, A vibration motor (11) is installed on the solid storage tank (1) to set a time interval for vibration, thereby improving the density of the solid additive.

6. A solid powder adding device according to claim 3, characterized in that, A level switch is installed on the solid storage tank (1) to automatically alarm when there is a lack of solid additives in the tank. At the same time, four weight sensors (10) are installed at fixed positions on the solid storage tank (1) to process data through the PLC in the control cabinet (8) and to verify the solid additives output by the variable frequency screw conveyor (3).

7. A solid powder adding device according to claim 2, characterized in that, The electrical components of the intelligent control unit are all installed in the control cabinet (8), and the operation panel is located in the human-machine interface (7).

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