Novel fracturing valve box inner cavity structure capable of improving loading capacity

Abstract

The utility model discloses a novel fracturing valve box inner cavity structure capable of improving loading capacity, which comprises a fracturing valve box body, a plurality of cross-shaped cavities are arranged in the fracturing valve box body, the plurality of cross-shaped cavities are linearly arranged along the side edge of the fracturing valve box body, a cross-shaped cavity center is arranged in the middle of each cross-shaped cavity, and a plurality of cross-shaped cavities are arranged in the cross-shaped cavity center. The two side edges of the center of the cross-shaped cavity are both cross-shaped corners, a suction hole is formed in the right end of the cross-shaped cavity, a plunger hole is formed in the upper end of the cross-shaped cavity, and the suction hole and the plunger hole are perpendicular to each other and are in through connection through the cross-shaped cavity; the cross-shaped corner is located at the position, with the maximum internal stress value, of the fracturing valve box body, and the cross-shaped corner is formed into a chamfered edge through machining. According to the utility model, the structure of the inner cavity of the fracturing valve box is optimized, and the stress of the optimized structure is measured in the simulation process, so that the optimized structure is determined, the stress concentration degree of the inner cavity in the working state is effectively reduced, the loading capacity is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, specifically to a novel fracturing valve box internal cavity structure that improves pressure resistance. Background Technology

[0002] Fracturing valve boxes are crucial components in oil extraction and production enhancement operations, widely used in oilfields, gas fields, and other resource and production enhancement projects. The power source of a fracturing valve box consists of a power end and a hydraulic end. The power end transmits kinetic energy from a diesel engine or electric motor to the hydraulic end via a plunger. The hydraulic end then pressurizes the fluid within the sealed fracturing valve chamber, completing the fracturing process. During fracturing, the valve box cavity experiences significant compressive stress. Prolonged hydraulic operation leads to substantial compressive stress, eventually causing wear on the valve box cavity. When the wear is significant, its service life reaches its limit. Studying the stress distribution within the fracturing valve box cavity helps understand the failure risks and propose improvement measures, such as improving the valve box materials or structure, which is crucial for extending the service life of fracturing valve boxes.

[0003] The existing internal structure of fracturing valve boxes suffers from high stress concentration and poor pressure bearing capacity during application, which affects their service life. Therefore, it does not meet the current requirements. To address this, we propose a new internal structure for fracturing valve boxes that improves pressure bearing capacity. Utility Model Content

[0004] The purpose of this invention is to provide a novel internal structure for fracturing valve boxes that improves pressure-bearing capacity, thereby solving the problem mentioned in the background art that the internal structure of existing fracturing valve boxes has a high degree of stress concentration and poor pressure-bearing capacity during application, which in turn affects service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel fracturing valve box internal cavity structure for improving pressure resistance, comprising a fracturing valve box body, wherein the interior of the fracturing valve box body is provided with multiple cross-shaped cavities, the multiple cross-shaped cavities are arranged linearly along the side of the fracturing valve box body, a cross cavity center is provided in the middle of the cross cavity, the two sides of the cross cavity center are cross corners, a suction port is provided at the right end of the cross cavity, a plunger port is provided at the upper end of the cross cavity, the suction port and the plunger port are perpendicular to each other and are connected through the cross cavity.

[0006] Preferably, the cross corner is located at the point of maximum internal stress in the fracturing valve housing, and the cross corner is machined into a chamfered edge with an angle of 45 degrees.

[0007] Preferably, the cross corner is located at the point of maximum internal stress in the fracturing valve housing, and the cross corner is machined into a rounded edge with a radius of 4mm.

[0008] Preferably, a plurality of valve seats are fixedly installed at the front end of the fracturing valve box, and a suction port cover is threadedly connected to the inner side of the front end of the valve seat. A plurality of plunger covers are threadedly connected to the inner side of the upper end of the fracturing valve box. The plurality of suction port covers and plunger covers are respectively inserted into the inner side of the suction port and the plunger port and are arranged linearly along the side of the fracturing valve box.

[0009] Preferably, both ends of the fracturing valve housing are fixedly installed with discharge port covers, and one side of each discharge port cover is provided with multiple discharge flange holes. The two discharge port covers are installed symmetrically relative to the fracturing valve housing.

[0010] Preferably, the fracturing valve housing is made of 15-5PH stainless steel, and the density of the fracturing valve housing is ρ = 7833 kg / m³. 3 It has a Poisson's ratio of 0.2755, a tensile strength of 1000 MPa, a yield strength of 900 MPa, an elongation after fracture of 17%, and a reduction of area of ​​45%.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention uses ANSYS-Workbench software to simulate the stress distribution of a cross-shaped cavity. The corners of the cross are machined into chamfered edges and rounded edges. Under static and dynamic loading conditions, alternating pressure loads are applied to the cross-shaped cavity, and the maximum stress, strain, and displacement deformation values ​​on the two sides of the center of the cross (the corners, chamfers, and rounded edges) are measured and read. By comparing the simulation results of the corners, chamfers, and rounded edges, it can be determined that the edge structure of the fracturing valve box cavity is a rounded edge. By machining the corners of the cross into rounded edges, the stress concentration of the cavity under working conditions can be effectively reduced, and the pressure bearing capacity and service life of the center of the cross can be improved. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the entire utility model;

[0015] Figure 3 This is a schematic diagram of the cross-shaped corner structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the chamfered edge structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the rounded corners of this utility model.

[0018] In the diagram: 1. Fracturing valve housing; 2. Cross corner; 3. Center of the cross cavity; 4. Chamfered edge; 5. Rounded edge; 6. Valve seat; 7. Discharge flange hole; 8. Discharge hole gland; 9. Suction hole gland; 10. Plunger gland. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figure 1 and Figure 2 The present invention provides an embodiment of a novel fracturing valve box cavity structure for improving pressure bearing capacity, comprising a fracturing valve box body 1, wherein the interior of the fracturing valve box body 1 is provided with multiple cross-shaped cavities, the multiple cross-shaped cavities are linearly arranged along the side of the fracturing valve box body 1, and discharge port covers 8 are fixedly installed at both ends of the fracturing valve box body 1, and multiple discharge flange holes 7 are provided on one side of the discharge port cover 8, and the two discharge port covers 8 are symmetrically installed relative to the fracturing valve box body 1;

[0021] Multiple valve seats 6 are fixedly installed at the front end of the fracturing valve housing 1. The inner side of the front end of the valve seat 6 is connected to the suction port cover 9 by thread. Multiple plunger covers 10 are connected to the inner side of the upper end of the fracturing valve housing 1 by thread. The right end of the cross-shaped cavity is provided with a suction port, and the upper end of the cross-shaped cavity is provided with a plunger hole. The suction port and the plunger hole are perpendicular to each other and are connected through the cross-shaped cavity. Multiple suction port covers 9 and plunger covers 10 are respectively inserted into the inner side of the suction port and the plunger hole and are arranged linearly along the side of the fracturing valve housing 1. The cross-shaped cavity can meet the pressure of the liquid by the fracturing valve housing 1.

[0022] Please see Figures 3 to 5 The fracturing valve housing 1 is made of 15-5PH stainless steel, and its density ρ = 7833 kg / m³. 3 The Poisson's ratio is 0.2755, the tensile strength is 1000MPa, the yield strength is 900MPa, the elongation after fracture is 17%, the reduction of area is 45%, and the center of the cross-shaped cavity is provided in the middle of the cross cavity center 3. The two sides of the center of the cross cavity 3 are cross corners 2. By limiting the parameters of the fracturing valve box 1, the accuracy of the simulation results can be improved.

[0023] The cross corner 2 is the point where the internal stress value of the fracturing valve box 1 is the maximum. The cross corner 2 is machined into a chamfered edge 4 with an angle of 45 degrees. The cross corner 2 is the point where the internal stress value of the fracturing valve box 1 is the maximum. The cross corner 2 is machined into a rounded edge 5 with a size of 4mm. By comparing the simulation results of the cross corner 2, chamfered edge 4 and rounded edge 5, the edge structure of the fracturing valve box cavity is determined, which effectively reduces the stress concentration in the cavity under working conditions and improves the pressure bearing capacity and service life of the center of the cross cavity.

[0024] In summary, when optimizing the cross-shaped cavity in the fracturing valve housing 1, the stress distribution of the cross-shaped cavity was simulated using ANSYS-Workbench software. Specifically, under static and dynamic loading conditions, alternating pressure loads were applied to the cross-shaped cavity, and the maximum stress, strain, and displacement deformation values ​​on the two side cross corners 2 of the center 3 of the cross cavity were recorded. Then, the cross corners 2 were machined into chamfered edges 4 and rounded edges 5, respectively, and the stress distribution of the cross-shaped cavity was simulated again using ANSYS-Workbench software.

[0025] This allows for the measurement and reading of the maximum stress, strain, and displacement deformation values ​​on the chamfered edge 4 and the rounded edge 5 under static and dynamic loading conditions, respectively. By comparing the simulation results of the cross corner 2, the chamfered edge 4, and the rounded edge 5, it can be determined that the edge structure of the inner cavity of the fracturing valve box 1 is the rounded edge 5. Processing the cross corner 2 into the rounded edge 5 can improve the pressure bearing capacity and service life of the fracturing valve box 1.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel fracturing valve box cavity structure for improving pressure bearing capacity, comprising a fracturing valve box body (1), characterized in that: The fracturing valve housing (1) has multiple cross-shaped cavities inside. The multiple cross-shaped cavities are arranged linearly along the side of the fracturing valve housing (1). The center of the cross-shaped cavity is provided in the middle of the cross-shaped cavity (3). The two sides of the center of the cross-shaped cavity (3) are cross corners (2). The right end of the cross-shaped cavity is provided with a suction hole. The upper end of the cross-shaped cavity is provided with a plunger hole. The suction hole is perpendicular to the plunger hole and is connected through the cross-shaped cavity.

2. The novel fracturing valve box cavity structure for improving pressure bearing capacity according to claim 1, characterized in that: The cross corner (2) is the point where the internal stress value of the fracturing valve box (1) is the maximum. The cross corner (2) is formed into a chamfered edge (4) by machining. The angle of the chamfered edge (4) is forty-five degrees.

3. The novel fracturing valve box inner cavity structure for improving pressure bearing capacity according to claim 1, characterized in that: The cross corner (2) is the point where the internal stress value of the fracturing valve box (1) is the maximum. The cross corner (2) is machined into a rounded edge (5), and the size of the rounded edge (5) is 4mm.

4. The novel fracturing valve box inner cavity structure for improving pressure bearing capacity according to claim 1, characterized in that: Multiple valve seats (6) are fixedly installed at the front end of the fracturing valve box (1). The inner side of the front end of the valve seat (6) is connected to the suction port cover (9) by thread. Multiple plunger covers (10) are connected to the inner side of the upper end of the fracturing valve box (1) by thread. The multiple suction port covers (9) and plunger covers (10) are respectively inserted into the inner side of the suction port and the plunger port and are arranged linearly along the side of the fracturing valve box (1).

5. The novel fracturing valve box cavity structure for improving pressure bearing capacity according to claim 4, characterized in that: Both ends of the fracturing valve housing (1) are fixedly installed with discharge port covers (8). Each discharge port cover (8) has multiple discharge flange holes (7) on one side. The two discharge port covers (8) are installed symmetrically relative to the fracturing valve housing (1).

6. The novel fracturing valve box inner cavity structure for improving pressure bearing capacity according to claim 5, characterized in that: The fracturing valve housing (1) is made of 15-5PH stainless steel, and the density of the fracturing valve housing (1) is ρ = 7833 kg / m³. 3 It has a Poisson's ratio of 0.2755, a tensile strength of 1000 MPa, a yield strength of 900 MPa, an elongation after fracture of 17%, and a reduction of area of ​​45%.

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