Proppant crushing chamber

Abstract

The utility model discloses a proppant crushing chamber. The device comprises an upper cylinder body and a seat body, a cylinder body flange is arranged on the edge of the bottom of the upper cylinder body, a seat body flange matched with the cylinder body flange is arranged on the edge of the upper portion of the seat body, and the device further comprises a clamp assembly. The upper cylinder body is arranged on the seat body and can hold and fix the cylinder body flange and the seat body flange through the hoop assembly, so that the bottom of the through cavity is closed, and the upper cylinder body serves as a crushing cavity for bearing pressure of a propping agent; and displacement can be generated between the upper cylinder body and the seat body by loosening the hoop assembly, so that the proppant can be conveniently taken out. The propping agent crushing device has the advantages that the propping agent can be crushed on the premise of ensuring the integrity of the upper cylindrical barrel, the problems of sand leakage, piston jamming and the like caused by a radially split half-barrel structure are avoided, the use reliability is improved, and the convenience of solving faults in a propping agent crushing experiment is greatly improved; and the use stability and reliability of the whole crushing chamber are ensured.

Description

Technical Field

[0001] This utility model relates to an indoor experimental apparatus for evaluating the anti-fracture ability of fracturing proppant in petroleum engineering, and more particularly to a proppant fracture chamber. Background Technology

[0002] Proppants play a crucial supporting role in artificially fractured surfaces, directly affecting fracture conductivity and fracturing effectiveness. Currently, various types of proppants are available on the market, such as natural quartz sand, manufactured sand, and coated sand. Laboratory tests are needed to evaluate the anti-fracture capabilities of different types and particle sizes of proppants. Currently, small-particle-size proppants are used more frequently in fracturing, including 200-400 mesh (38-75µm) and 70 / 140 mesh (106-212µm) proppants. When evaluating the proppant's resistance to breakage, the proppant needs to be placed in the crushing chamber and pressurized using a press to crush the small proppant pieces. Typically, quartz sand has low resistance to breakage, leading to the proppant being crushed and compacted within the crushing chamber. Once compacted, the quartz sand proppant is difficult to remove. Furthermore, there is often a situation where the piston of the crushing chamber is stuck to the chamber, making it difficult to pull out the proppant. This increases the operational difficulty and time cost. Therefore, it is sometimes necessary to use scraping or hammering methods to disperse the proppant before removal. However, hammering can cause damage to the crushing chamber and is inconvenient to operate, while scraping can cause secondary scratches and breakage of the proppant, affecting the actual resistance to breakage and increasing data errors.

[0003] Currently, a utility model patent entitled "Propionage Chamber" (CN212206854U) has been published in China. This invention involves a proppant crushing chamber whose cylinder is composed of two longitudinally split half-cylinders joined together. The two half-cylinders are positioned and assembled using a concave-convex structure and locked with bolts. If the piston cannot be removed after pressurization, the bolts can be removed to divide the proppant crushing chamber into two half-cylinders, allowing for easy removal of the piston and proppant without damaging the chamber or contaminating the proppant. However, because it is composed of two radially split half-cylinders, the assembly precision and bolt tightness require high stability of the overall structure. Loose bolts or improper positioning of the concave-convex structure may lead to sand leakage or piston jamming. Especially when the piston is jammed, all bolts need to be removed and the crushing chamber divided into two half-cylinders, making the operation cumbersome. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a proppant crushing chamber to solve the problem that the crushed and compacted proppant is difficult to pour out after being pressurized and compacted by small and medium-sized proppant.

[0005] To solve the above-mentioned technical problems, the present invention provides a proppant crushing chamber, comprising an upper cylindrical body with a through cavity and a seat for supporting the bottom of the upper cylindrical body. The bottom edge of the upper cylindrical body is provided with a cylindrical flange, and the upper edge of the seat is provided with a seat flange that matches the cylindrical flange. The invention also includes a clamping assembly for clamping the cylindrical flange and the seat flange. The upper cylindrical body is placed on the seat and the clamping assembly can clamp and fix the cylindrical flange and the seat flange, thereby sealing the bottom of the through cavity and serving as a crushing chamber for bearing the pressure of the proppant. By loosening the clamping assembly, displacement can be generated between the upper cylindrical body and the seat, thereby facilitating the removal of the proppant.

[0006] The clamp assembly includes two semi-ring clamps with engagement grooves and a connecting block for hinged connection of the two semi-ring clamps; one end of each of the two semi-ring clamps is hinged to the connecting block and the other end forms an opening and closing end that can open and close freely relative to the connecting block; the cylinder flange and the seat flange engage in the engagement grooves of the two semi-ring clamps and can be locked and fixed by connecting fasteners at the opening and closing ends.

[0007] Each of the two semi-ring clamps has a connecting arm for connecting a fastener, and the fastener can lock the opening and closing ends of the two semi-ring clamps through the connecting holes on the two connecting arms.

[0008] The opposing surfaces of the two connecting arms are provided with guide ramps that can form V-shaped openings.

[0009] The upper circumferential edge of the cylindrical flange and the lower circumferential surface of the seat flange are both provided with beveled corners, and the upper and lower edges of the engagement grooves of the two semi-ring clamps are both provided with inner chamfers that match the corresponding beveled corners.

[0010] The connecting block has a C-shaped cross-section and forms a groove for engaging with the semi-ring clamps. One end of each of the two semi-ring clamps is placed in the groove formed by the connecting block.

[0011] The inner diameter of the through cavity through the cylindrical body is 50.8 mm or 76.2 mm.

[0012] The outer diameter of the base is larger than the outer diameter of the upper cylindrical body.

[0013] The advantages of this utility model are:

[0014] (1) By setting a crushing chamber for bearing the pressure of the proppant directly composed of the seat and the upper cylindrical body with a through cavity placed on the seat, the proppant can be crushed while ensuring the integrity of the upper cylindrical body. This avoids problems such as sand leakage and piston jamming caused by loose bolts or improper positioning of the concave and convex structure in the radially split half-cylinder structure. This improves the reliability of use.

[0015] (2) The cylinder flange provided at the bottom edge of the upper cylindrical body, the seat flange provided at the upper edge of the seat body that matches the cylinder flange, and the clamp assembly used to clamp the cylinder flange and the seat flange can not only make displacement between the upper cylindrical body and the seat body by loosening the clamp assembly, thus facilitating the removal of the proppant, but also quickly separate the upper cylindrical body and the seat body and remove the piston when the piston is stuck, greatly improving the convenience of troubleshooting.

[0016] (3) By designing the structure of the clamp assembly, it can reliably clamp and fix the cylinder flange and the seat flange, and its clamping is stable and reliable, thereby ensuring the stability and reliability of the entire crushing chamber.

[0017] (4) The upper circumferential edge of the cylinder flange and the lower circumferential surface of the seat flange are provided with chamfered angles, and the upper and lower edges of the engagement grooves of the two semi-ring clamps are provided with inner chamfers that match the corresponding chamfered angles. This further improves the accuracy of the fit and ensures the tightness of the connection. In addition, the connection is made by connecting blocks and fasteners, which makes the disassembly and assembly process simple and quick, reducing the complexity of operation and time cost. Attached Figure Description

[0018] Figure 1 This is a partial cross-sectional structural diagram of the proppant crushing chamber of this utility model;

[0019] Figure 2 This is a top view of the proppant crushing chamber of this utility model. Detailed Implementation

[0020] The proppant crushing chamber of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] As shown in the figure, the proppant crushing chamber of this embodiment includes an upper cylindrical body 1 with a through cavity 9 and a seat 2 for supporting the bottom of the upper cylindrical body. The inner diameter of the through cavity 9 of the cylindrical body 1 is 50.8 mm or 76.2 mm. The bottom edge of the upper cylindrical body 1 is provided with a cylindrical flange 3, and the upper edge of the seat 2 is provided with a seat flange 4 that matches the cylindrical flange 3. That is, the outer diameters of the cylindrical flange 3 and the seat flange 4 are the same. In other words, the seat 2 is composed of a bottom body and a seat flange 4, and the upper cylindrical body 1 is composed of a cylindrical body and a cylindrical flange 3. The outer diameter of the bottom body of the seat 2 is larger than the outer diameter of the cylindrical body of the upper cylindrical body 1, which increases stability. It also includes a clamping assembly 5 for clamping the cylindrical flange 3 and the seat flange 4. As shown in the figure, the clamping assembly 5 in this embodiment includes two semi-ring clamps 6, each with a locking groove 10, and a connecting block 7 for hinged connection of the two semi-ring clamps, thereby enabling... Two semi-ring clamps 6 are hinged at one end to the connecting block, and their other ends form an opening and closing end that can open and close freely relative to the connecting block. The connecting block 7 has a C-shaped cross-section and forms a groove for engaging with the semi-ring clamps 6. One end of each of the two semi-ring clamps 6 is placed in the groove formed by the connecting block 7 and is hinged to the connecting block by a pin. When the upper cylindrical body 1 is placed on the base 2, the cylinder flange 3 and the base flange 4 are engaged in the engagement grooves of the two semi-ring clamps 6 and can be locked and fixed by fasteners 8 at the opening and closing ends. This achieves the purpose of holding and fixing the cylinder flange 3 and the base flange 4 by the clamp assembly 5, and finally closes the bottom of the through cavity 9, which serves as a crushing cavity for bearing the pressure of the proppant. When the proppant is compacted and difficult to remove, the upper cylindrical body 1 and the base 2 can be displaced by loosening the clamp assembly 5, thus facilitating the removal of the proppant.

[0022] Furthermore, each of the two semi-ring clamps 6 has a connecting arm 11 for connecting fasteners. The two connecting arms have connecting holes, and the fasteners 8 can lock the opening and closing ends of the two semi-ring clamps 6 through the connecting holes on the two connecting arms. In addition, guide slopes that can form V-shaped openings can be provided on the opposite sides of the two connecting arms 11.

[0023] Furthermore, the upper circumferential edge of the cylindrical flange 3 and the lower circumferential surface of the seat flange 4 are both provided with beveled corners, and the upper and lower edges of the engagement grooves of the two semi-ring clamps 6 are both provided with inner chamfers that match the beveled corners of the flanges, which increases the contact area and allows for a tighter fit to increase stability, thereby improving the matching effect.

Claims

1. A proppant crushing chamber, characterized in that: The device includes an upper cylindrical body (1) with a through cavity (9) and a seat (2) for supporting the bottom of the upper cylindrical body. The bottom edge of the upper cylindrical body (1) is provided with a cylindrical flange (3), and the upper edge of the seat (2) is provided with a seat flange (4) that matches the cylindrical flange (3). The device also includes a clamping assembly (5) for clamping the cylindrical flange (3) and the seat flange (4). The upper cylindrical body (1) is placed on the seat (2) and can be clamped and fixed by the clamping assembly (5), thereby closing the bottom of the through cavity (9) and serving as a crushing chamber for crushing the proppant. By loosening the clamping assembly (5), displacement can be generated between the upper cylindrical body (1) and the seat (2), thereby facilitating the removal of the proppant.

2. The proppant crushing chamber according to claim 1, characterized in that: The clamp assembly (5) includes two semi-ring clamps (6) with engagement grooves (10) and a connecting block (7) for hinged connection of the two semi-ring clamps; one end of the two semi-ring clamps (6) is hinged to the connecting block and the other end forms an opening end that can be freely opened and closed relative to the connecting block; the cylinder flange (3) and the seat flange (4) engage in the engagement grooves of the two semi-ring clamps (6) and can be locked and fixed by fasteners (8) connected at the opening end.

3. The proppant crushing chamber according to claim 2, characterized in that: Each of the two semi-ring clamps (6) has a connecting arm (11) for connecting fasteners. The fasteners (8) can lock the opening and closing ends of the two semi-ring clamps (6) through the connecting holes on the two connecting arms.

4. The proppant crushing chamber according to claim 3, characterized in that: The two connecting arms (11) are provided with guide slopes on their opposite sides that can form V-shaped openings.

5. The proppant crushing chamber according to claim 2, 3 or 4, characterized in that: The upper circumferential edge of the cylindrical flange (3) and the lower circumferential surface of the seat flange (4) are provided with beveled corners, and the upper and lower edges of the engagement grooves of the two semi-ring clamps (6) are provided with inner chamfers that match the corresponding beveled corners.

6. The proppant crushing chamber according to claim 5, characterized in that: The cross-sectional shape of the connecting block (7) is C-shaped. The C-shaped connecting block (7) forms a mounting groove for cooperating with the semi-ring clamps (6). One end of the two semi-ring clamps (6) is placed in the mounting groove formed by the connecting block (7).

7. The proppant crushing chamber according to claim 6, characterized in that: The inner diameter of the through cavity (9) through which the cylindrical body (1) passes is 50.8 mm or 76.2 mm.

8. The proppant crushing chamber according to claim 1, characterized in that: The outer diameter of the seat (2) is greater than the outer diameter of the upper cylindrical body (1).

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