Demonstration teaching aid and demonstration system for well cementation cement slurry grain composition theory

Abstract

The utility model relates to the technical field of well cementation technology education demonstration, in particular to a demonstration teaching aid and a demonstration system for a well cementation cement slurry grain composition theory, and aims to solve the problems that the demonstration effect is poor and the cement slurry grain composition theory is difficult to intuitively feel due to lack of teaching aids. The utility model provides a teaching aid for demonstrating the grain composition theory of well cementation cement slurry. The teaching aid comprises an observation cover, a stirring blade, simulation particles and water, simulation particles and water are placed in the observation cover, and the stirring blade is rotationally installed on the observation cover and can rotate around the axis of the stirring blade. According to the demonstration teaching aid for the well cementation cement slurry particle gradation theory, the simulation particles and water are placed in the observation cover, the stirring paddle is used for stirring to display the influence of the particle gradation on the fluidity of the cement slurry, and the demonstration teaching aid has the advantages of being simple in structure, easy and convenient to operate, visual in teaching demonstration effect and convenient to understand.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cementing technology education demonstration technology especially, a kind of demonstration teaching aid and demonstration system of cementing cement slurry particle size distribution theory. BACKGROUND

[0002] Particle size distribution is an important method to improve the comprehensive performance of cementing cement slurry and an important means to realize the long-term sealing integrity of oil and gas well. This technology optimizes the cement formula design, so that small-size particles are better filled in large-size particles, maximally improves the packing rate (PVF) of dry mixed particles, reduces the content of free water in the cement slurry system under the premise of ensuring the rheological property of cement slurry, improves the microstructure of hardened paste, improves the mechanical properties of cement stone, reduces the permeability and shrinkage of cement stone, thereby greatly improves the comprehensive performance of cement stone, effectively solves the cementing problems such as low pressure leakage and high pressure gas channeling, and solves the contradiction between cementing construction and the mechanical properties of cement stone.

[0003] However, at present, the theory is only described simply by text, pictures and other means, which cannot enable the viewer to have an intuitive feeling of the above theory through actual operation, and the education and demonstration effect is poor. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of demonstration teaching aid and demonstration system of cementing cement slurry particle size distribution theory to solve the problem that lack of teaching aid leads to poor demonstration effect and it is difficult to intuitively feel the cement slurry particle size distribution theory.

[0005] To solve the above technical problem, the technical scheme provided by the utility model is as follows:

[0006] A kind of demonstration teaching aid of cementing cement slurry particle size distribution theory, including observation cover, stirring paddle, simulated particle and water;

[0007] The simulated particle and water are placed in the observation cover, and the stirring paddle is rotatably installed in the observation cover and can rotate around its own axis.

[0008] Further, the demonstration teaching aid of cementing cement slurry particle size distribution theory further includes a motor, the motor is connected with the stirring paddle, and is used to drive the stirring paddle to rotate around its own axis.

[0009] Further, the demonstration teaching aid of cementing cement slurry particle size distribution theory further includes a magnetic rotor, the magnetic rotor includes a driving rotor and a driven rotor, the driving rotor drives the driven rotor to rotate;The driving rotor is connected with the motor, and the driven rotor is connected with the stirring paddle.

[0010] Further, the demonstration teaching aid for the particle grading theory of cementing slurry further comprises a mounting seat, the motor is mounted in the mounting seat, and the observation cover is mounted on the mounting seat and detachably connected with the mounting seat.

[0011] Further, the demonstration teaching aid for the particle grading theory of cementing slurry further comprises a switch for controlling the start and stop of the motor.

[0012] Further, the observation cover is made of transparent material.

[0013] Further, the simulation particles comprise first particles, the particle size of the first particles is 200-400 mu m, the total weight of the first particles is 100-150 g, and the weight of water is 20-30 g.

[0014] Further, the simulation particles further comprise second particles, the particle size of the second particles is 30-50 mu m, and the total weight of the second particles is 5-10 g.

[0015] Further, the simulation particles further comprise third particles, the particle size of the third particles is 1-3 mu m, and the total weight of the third particles is 5-10 g.

[0016] In another aspect, the utility model provides a demonstration system for the particle grading theory of cementing slurry, which comprises three demonstration teaching aids for the particle grading theory of cementing slurry, namely a first teaching aid, a second teaching aid and a third teaching aid.

[0017] The simulation particles of the first teaching aid comprise first particles, the simulation particles of the second teaching aid comprise the first particles and second particles, and the simulation particles of the third teaching aid comprise the first particles, the second particles and third particles.

[0018] The particle size of the first particles is 200-400 mu m, the total weight of the first particles is 100-150 g, and the weight of water is 20-30 g.

[0019] The particle size of the second particles is 30-50 mu m, and the total weight of the second particles is 5-10 g.

[0020] The particle size of the third particles is 1-3 mu m, and the total weight of the third particles is 5-10 g.

[0021] The technical effects achieved by the utility model are as follows.

[0022] The demonstration teaching aid for the particle grading theory of cementing slurry provided by the utility model comprises an observation cover, stirring paddles, simulation particles and water, the simulation particles and water are placed in the observation cover, and the stirring paddles are rotatably mounted on the observation cover and can rotate around the axis thereof.

[0023] The demonstration teaching aid of the well cementing slurry particle size distribution theory has the advantages of simple structure, convenient operation, intuitive teaching demonstration effect and convenient understanding. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Fig. 1 The structure schematic diagram of the demonstration teaching aid of the well cementing slurry particle size distribution theory provided by the embodiments of the present utility model is shown in the figure.

[0026] Fig. 2 The structure schematic diagram of the demonstration teaching aid of the well cementing slurry particle size distribution theory provided by the embodiments of the present utility model is shown in the figure.

[0027] Fig. 3 The structure schematic diagram of the demonstration teaching aid of the well cementing slurry particle size distribution theory provided by the embodiments of the present utility model is shown in the figure.

[0028] Icon: 100, observation cover; 200, stirring paddle; 310, first particle; 320, second particle; 330, third particle; 400, water; 500, motor; 600, magnetic rotor; 610, driving rotor; 620, driven rotor; 700, mounting seat; 800, switch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present utility model more clear, the technical scheme in the embodiments of the present utility model will be described clearly and completely in combination with the drawings in the embodiments of the present utility model, obviously, the described embodiments are some embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but only represents selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present utility model.

[0031] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The theory of particle size distribution in cement slurry is only described in simple terms such as text and pictures, which cannot enable viewers to have an intuitive understanding of the theory through actual operation, resulting in poor educational demonstration effects.

[0033] In view of this, the present invention provides a demonstration teaching tool for the particle size distribution theory of cement slurry, including an observation cover 100, a stirring blade 200, simulated particles and water 400; the simulated particles and water 400 are placed in the observation cover 100, and the stirring blade 200 is rotatably mounted on the observation cover 100 and can rotate around its own axis.

[0034] The demonstration teaching tool for the particle size distribution theory of cement slurry provided by this utility model demonstrates the effect of particle size distribution on the fluidity of cement slurry by placing simulated particles and water 400 into the observation hood 100 and stirring with the stirring blade 200. It has the advantages of simple structure, easy operation, intuitive teaching demonstration effect and easy understanding.

[0035] The following combination Figs. 1-3 The structure and shape of the demonstration tool for the particle size distribution theory of cement slurry provided in this embodiment are described in detail:

[0036] In an optional embodiment, the demonstration tool for the particle size distribution theory of cement slurry includes an observation cover 100, an agitator 200, simulated particles, water 400, a motor 500, a magnetic rotor 600, a mounting base 700, and a switch 800. The simulated particles, water 400, and agitator 200 are all housed within the observation cover 100, which is detachably connected to the mounting base 700. The motor 500 is mounted within the mounting base 700. The magnetic rotor 600 transmits power to drive the motor 500 to rotate the agitator 200 around its own axis. The switch 800 controls the start and stop of the motor 500.

[0037] In this embodiment, the magnetic rotor 600 includes a driving rotor 610 and a driven rotor 620. The driving rotor 610 is connected to the motor 500, and the driven rotor 620 is connected to the stirring blade 200. Specifically, the driven rotor is rotatably mounted inside the observation cover 100. Both the driving rotor 610 and the driven rotor 620 are provided with an even number of magnets. The magnets are arranged around the axes of the driving rotor 610 and the driven rotor 620, respectively, and the magnetic poles of adjacent magnets are opposite, thereby transmitting power through magnetic force. The driving rotor 610 and the driven rotor 620 do not need to be in direct contact. By using the magnetic rotor 600, contactless power transmission is achieved, avoiding the need for the shaft to pass through the observation cover 100 due to power transmission, thus preventing water 400 leakage.

[0038] In this embodiment, bearings or shafts can be arranged in the observation cover 100 to mount the driven rotor 620.

[0039] In this embodiment, the observation cover 100 is made of transparent material and has a sealed structure, specifically, it can be a sealed semicircular transparent structure; the material can be glass, plastic, etc. The sealed structure can prevent water 400 from flowing out and ensure the accuracy of the demonstration effect.

[0040] In this embodiment, for easy observation, the observation cover 100 is detachably connected with the mounting seat 700, so that the observation cover 100 can be taken off alone to facilitate the students to observe the experimental effect. Specifically, a limiting groove with an upward opening is formed on the mounting seat 700, and the lower end of the observation cover 100 is inserted and fixed in the limiting groove to prevent displacement, and can be directly lifted when taken off.

[0041] In this embodiment, the simulation particles are used to simulate the cement slurry particles, specifically, including first particles 310, second particles 320 and third particles 330, and during use, according to the demonstration needs, only the first particles 310 can be put in, the first particles and the second particles 320 can be put in, or all the three kinds of particles can be put in. Among them, the particle size of the first particles 310 is 200-400 μm, the total weight is 100-150 g; the weight of the water 400 is 20-30 g; the particle size of the second particles 320 is 30-50 μm, the total weight is 5-10 g; the particle size of the third particles 330 is 1-3 μm, the total weight is 5-10 g.

[0042] In this embodiment, the simulation particles can be made of any one or several of ceramic, silicon powder and nano-silicon particles, and the shape can be spherical or spherical-like.

[0043] In this embodiment, the rotating speed of the motor 500 is 4000 rpm, so as to drive the stirring paddle 200 to rotate and stir at a speed of 4000 rpm.

[0044] Based on the demonstration teaching aid of the cement slurry particle grading theory provided in this embodiment, a demonstration system of the cement slurry particle grading theory is proposed, which includes three demonstration teaching aids of the cement slurry particle grading theory, which are named as the first teaching aid, the second teaching aid and the third teaching aid. The three teaching aids differ in the types of simulation particles used, so as to facilitate comparison and observation. Specifically, the simulation particles in the first teaching aid are the first particles 310, the simulation particles in the second teaching aid are the first particles 310 and the second particles 320, and the simulation particles in the third teaching aid are the first particles 310, the second particles 320 and the third particles 330.

[0045] In the experiment, the switches 800 of the first teaching aid, the second teaching aid and the third teaching aid are opened respectively, the motor 500 is started to drive the stirring paddle 200 to rotate, and the flowability of the slurry is observed through the observation cover 100. It can be found by comparing the first teaching aid, the second teaching aid and the third teaching aid that the slurry in the first teaching aid has no flowability, the slurry in the second teaching aid has a certain flowability but is not good, and the slurry in the third teaching aid has better flowability. It can be seen that the particle gradation has a great influence on the flowability of the cement slurry. The demonstration teaching aid of the cementing slurry particle gradation theory provided in the embodiment can help to stimulate the interest of the students in the theory and help them to deeply understand the significance of the theory, so as to realize high-quality cement slurry design and lay a foundation for improving the cementing quality.

[0046] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A demonstration aid for the theory of particle size distribution of cement slurries for well cementing, characterized in that, It comprises an observation cover (100), a stirring paddle (200), simulated particles and water (400); The simulated particles and water (400) are placed in the observation cover (100), and the stirring paddle (200) is rotatably installed in the observation cover (100) and can rotate around its own axis; It further comprises a motor (500) connected with the stirring paddle (200) for driving the stirring paddle (200) to rotate around its own axis; It further comprises a magnetic rotor (600) comprising a driving rotor (610) and a driven rotor (620), the driving rotor (610) transmits power by magnetic force to drive the driven rotor (620) to rotate; the driving rotor (610) is connected with the motor (500), and the driven rotor (620) is connected with the stirring paddle (200); It further comprises a mounting seat (700), the motor (500) is installed in the mounting seat (700), and the observation cover (100) is installed in the mounting seat (700) and detachably connected with the mounting seat (700); The observation cover (100) is made of transparent material; The observation cover (100) is provided with a bearing or a shaft for installing the driven rotor (620).

2. The teaching aid for the theory of particle grading of cement slurries for well cementing according to claim 1, characterized in that, It further comprises a switch (800) for controlling the start and stop of the motor (500).

3. The teaching aid for the theory of particle grading of cement slurries for well cementing according to claim 1, characterized in that, The simulated particles comprise first particles (310) with a particle size of 200-400 μm and a total weight of 100-150 g; The water (400) weighs 20-30 g.

4. The teaching aid for the theory of particle grading of cement slurries for well cementing according to claim 3, characterized in that, The simulated particles further comprise second particles (320) with a particle size of 30-50 μm and a total weight of 5-10 g.

5. The teaching aid for the theory of particle grading of cement slurries for well cementing according to claim 4, characterized in that, The simulated particles further comprise third particles (330) with a particle size of 1-3 μm and a total weight of 5-10 g.

6. A demonstration system for a theory of particle size distribution of cement slurries for well cementing, characterized in that, It comprises three demonstration teaching aids for the theory of cement slurry particle grading of well cementing according to any one of claims 1 or 2, which are respectively a first teaching aid, a second teaching aid and a third teaching aid; The simulated particles of the first teaching aid comprise first particles (310), the simulated particles of the second teaching aid comprise the first particles (310) and second particles (320), and the simulated particles of the third teaching aid comprise the first particles (310), the second particles (320) and third particles (330); The first particles (310) have a particle size of 200-400 μm and a total weight of 100-150 g; The water (400) weighs 20-30 g. The second particles (320) have a particle size of 30-50 μm and a total weight of 5-10 g. The third particles (330) have a particle size of 1-3 μm and a total weight of 5-10 g.

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