A long-life, easy-to-machine hydraulic end for a fracturing pump

Abstract

The utility model relates to petroleum and natural gas drilling equipment technical field especially discloses a kind of long service life easy-to-process fracturing pump fluid end including pump head body, plunger, packing assembly, low-pressure manifold, multiple suction components and multiple discharge components, multiple side-by-side and inverted T-shaped pump cavities are provided in pump head body, pump cavity includes vertical cavity one and transverse cavity two, plunger is set in the one end of cavity two and can reciprocate, suction component is detachably set in the other end of cavity two, discharge component is detachably set in the upper end of cavity one, packing assembly is sleeved on plunger and located at the port of the one end of cavity two, low-pressure manifold is set in the side of pump head body, low-pressure manifold and the other end of cavity two are communicated or closed by suction component.The utility model pump head body uses new structure, liquid inlet is horizontal with plunger, compared with the vertical liquid inlet structure commonly used, reduces intersecting line, reduces stress concentration, increases the service life of pump head body.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling equipment technology, and in particular to a hydraulic end of a fracturing pump with long service life and easy processing. Background Technology

[0002] In fracturing operations, the fracturing pump, as the main actuator of the fracturing equipment, is the core component and plays an irreplaceable role in the fracturing process. A fracturing pump typically has a power end and a hydraulic end, with the hydraulic end being a key component. It converts the mechanical energy of the power end into pressure energy. Conventional pressure pumps have a pump head with the inlet hole perpendicular to the plunger hole, resulting in numerous intersection lines and stress concentrations, which affects the service life of the pump head and makes processing difficult and material-intensive. Therefore, we have designed a fracturing pump hydraulic end that can extend the service life of the hydraulic end, save materials, and is easy to process. Utility Model Content

[0003] The purpose of this invention is to solve the problems in the prior art and provide a hydraulic end of a fracturing pump with a long service life and easy processing.

[0004] The technical solution of this utility model is:

[0005] A hydraulic end of a fracturing pump with long service life and easy processing includes a pump head body, a plunger, a packing assembly, a low-pressure manifold, multiple suction assemblies, and multiple discharge assemblies. The pump head body has multiple parallel and inverted T-shaped pump chambers, including a vertical chamber one and a horizontal chamber two. The plunger is reciprocally movable at one end of the chamber two. The suction assembly is detachably located at the other end of the chamber two. The discharge assembly is detachably located in the upper end of the chamber one. The packing assembly is fitted onto the plunger and located at the port of one end of the chamber two. The low-pressure manifold is located on one side of the pump head body. The low-pressure manifold and the other end of the chamber two are connected or closed through the suction assembly.

[0006] To allow the suction assembly to open under liquid pressure, the suction assembly includes a suction threaded gland, a spring support, a suction spring, a suction valve body, a suction valve seat, and a spring guide. One end of the suction threaded gland is detachably connected to the pump head body, and the other end is connected to the low-pressure manifold. The spring support, suction spring, and spring guide are all located inside the suction threaded gland. The suction valve body and suction valve seat cooperate to press the spring guide and suction valve body together through the suction threaded gland. The suction valve body has a long rod, and the spring guide and suction spring are both fitted onto the long rod. The tail end of the long rod is detachably connected to the spring support. The suction spring is installed between the spring guide and the spring support to close the inlet valve. The spring guide has multiple liquid passage holes.

[0007] To allow the discharge assembly to be closed by spring pressure, the discharge assembly includes a discharge valve seat, a discharge valve body, a discharge spring, a discharge gland, and a discharge threaded gland. The discharge threaded gland is detachably connected to the port of cavity one, and the discharge gland is located below the discharge threaded gland. The discharge spring is located between the discharge gland and the discharge valve body, and the discharge valve seat is located below the discharge valve body.

[0008] To achieve the purpose of sealing the plunger through the packing, the packing assembly includes a packing box, a packing ring, a packing group, and a packing seat. The packing box is detachably installed at one end of the cavity two. The packing seat is embedded in one end of the cavity two. The packing group, the packing ring, and the packing seat are installed in the packing box. The packing box, the packing ring, the packing group, and the packing seat are all fitted onto the plunger.

[0009] In order for the liquid to flow through the hole of the suction threaded gland via the low-pressure pipe, the suction threaded gland has a hollow cylindrical cavity structure inside, and four pairs of opposite holes are provided on the side wall. One end of the suction valve seat has a conical structure, and one end of the suction threaded gland has a corresponding structure that works in conjunction with the conical structure.

[0010] To achieve the special cavity structure of the low-pressure manifold, the low-pressure manifold is a cross-shaped pipeline mechanism. The low-pressure manifold includes a horizontally placed pipe 1 and multiple vertical pipes 2. The pipe 1 and multiple pipes 2 are all connected. The pipes 2 of the low-pressure manifold are correspondingly fitted onto multiple suction threaded caps.

[0011] To further enhance the seal, a groove is made at both ends of the contact point between the low-pressure manifold and the suction threaded gland, and an O-ring is installed at the first groove. A second groove is made on the contact surface between the low-pressure manifold and the pump head body, and an O-ring is installed at the second groove.

[0012] For ease of lubrication, the packing box and packing ring are machined with lubrication oil holes.

[0013] The present invention adopts the above structure and has the following advantages:

[0014] 1. The pump head body adopts a new structure, with the liquid inlet horizontal to the plunger. Compared with the commonly used vertical liquid inlet structure, this reduces the intersection line, reduces stress concentration, and increases the service life of the pump head body.

[0015] 2. The position of the pump head body suction inlet has been changed to reduce the number of intersection lines, making machining easier;

[0016] 3. The pump head body suction inlet and plunger disassembly port are shared, reducing the height of the pump head body and saving materials. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the low-pressure manifold of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the suction threaded cap of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the spring guide seat of this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the spring support seat of this utility model;

[0023] Figure 7 This is a three-dimensional structural diagram of the inhalation valve body of this utility model;

[0024] Figure 8 This is a three-dimensional structural diagram of the suction valve seat of this utility model.

[0025] In the diagram, 1. Piston; 2. Packing box; 3. Packing ring; 4. Packing assembly; 5. Packing seat; 6. Pump head body; 7. Suction valve seat; 8. Low-pressure manifold; 9. O-ring seal; 10. Suction threaded gland; 11. Spring support seat; 12. Suction spring; 13. Suction valve body; 14. Spring guide seat; 15. Discharge valve seat; 16. Discharge valve body; 17. Discharge spring; 18. Discharge gland; 19. Discharge threaded gland. Detailed Implementation

[0026] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0027] like Figure 1 and Figure 2 As shown, a hydraulic end of a fracturing pump with long service life and easy processing includes a pump head body 6, a plunger 1, a packing assembly, a low-pressure manifold 8, multiple suction assemblies, and multiple discharge assemblies. The pump head body 6 has multiple parallel and inverted T-shaped pump chambers machined inside. The pump chambers include a vertical chamber one and a horizontal chamber two. The plunger 1 is reciprocally mounted at one end of the chamber two. The suction assembly is detachably mounted at the other end of the chamber two. The discharge assembly is detachably mounted in the upper end of the chamber one. The packing assembly is fitted onto the plunger 1 and is located at the port of one end of the chamber two. The low-pressure manifold 8 is mounted on one side of the pump head body 6. The low-pressure manifold 8 and the other end of the chamber two are connected or closed through the suction assembly.

[0028] like Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the suction assembly includes a suction threaded cap 10, a spring support 11, a suction spring 12, a suction valve body 13, a suction valve seat 7, and a spring guide 14. One end of the suction threaded cap 10 is screwed onto the pump head body 6, and the other end of the suction threaded cap 10 is connected to the low-pressure manifold 8. The suction threaded cap 10 has a hollow cylindrical cavity structure inside, and four pairs of opposite holes are machined on its side wall. One end of the suction valve seat 7 has a conical structure, and one end face of the suction threaded cap 10 has a corresponding structure that works in conjunction with the conical structure. The suction valve body 13 and suction valve seat 7 are fitted together by suction threaded cap 10 to press spring guide seat 14 and suction valve body 13 together. Spring support seat 11, suction spring 12 and spring guide seat 14 are all located inside suction threaded cap 10. Suction valve body 13 has a long rod. Spring guide seat 14 and suction spring 12 are both sleeved on the long rod. The tail end of the long rod is detachably connected to spring support seat 11. Suction spring 12 is installed between spring guide seat 14 and spring support seat 11 to close the liquid inlet valve. Multiple liquid passage holes are machined on spring guide seat 14.

[0029] like Figure 3 As shown, the low-pressure manifold 8 is a cross-shaped piping structure. The low-pressure manifold 8 includes a horizontally positioned pipe 1 and multiple vertically positioned pipes 2. All pipes 1 and the multiple pipes 2 are connected, as shown below. Figure 1 and Figure 2 As shown, the second tube of the low-pressure manifold 8 is fitted onto multiple suction threaded glands 10; as Figure 2 As shown, a groove is opened at both ends of the contact point between the low-pressure manifold 8 and the suction threaded gland 10, and an O-ring seal 9 is installed at one of the grooves. A second groove is opened on the contact surface between the low-pressure manifold 8 and the pump head body 6, and an O-ring seal 9 is installed at the second groove.

[0030] like Figure 2 As shown, the discharge assembly includes a discharge valve seat 15, a discharge valve body 16, a discharge spring 17, a discharge gland 18, and a discharge threaded gland 19. The discharge threaded gland 19 is screwed onto the port of cavity one by threads. The discharge gland 18 is located below the discharge threaded gland 19. The discharge spring 17 is disposed between the discharge gland 18 and the discharge valve body 16. The discharge valve seat 15 is disposed below the discharge valve body 16.

[0031] like Figure 2 As shown, the packing assembly includes a packing box 2, a packing ring 3, a packing assembly 4, and a packing seat 5. The packing box 2 is screwed onto one end of the cavity 2 by threads. The packing seat 5 is embedded in one end of the cavity 2. The packing assembly 4, the packing ring 3, and the packing seat 5 are installed inside the packing box 2. The packing box 2, the packing ring 3, the packing assembly 4, and the packing seat 5 are all fitted onto the plunger 1. The packing box 2 and the packing ring 3 are machined with lubricating oil holes for lubrication.

[0032] Working principle: The principle of this utility model is the working principle of the traditional plunger pump mechanism, that is: by moving the plunger 1, the internal volume of the pump head body 6 is changed, thereby realizing the intake and discharge of high pressure fluid;

[0033] The pump head body 6 adopts a novel structure, with the suction port horizontal to the axis of the plunger 1. Compared to the commonly used vertical inlet structure, this reduces the intersection line, reduces stress concentration, increases the service life of the pump head body 6, and is easier to manufacture. The suction port of the pump head body 6 is equipped with a suction assembly, which uses a threaded cap to press the spring guide seat 14 and the suction valve body 13 together. The suction valve body 13 has a long rod with a threaded end fixed to the spring support seat 11. The suction spring 12 is installed between the spring guide seat 14 and the spring support seat 11 to close the inlet valve. The plunger... When the plunger 1 moves backward, the volume of the pump chamber decreases and increases. The suction assembly opens under the liquid pressure, and the discharge assembly closes under the pressure of the spring. The liquid flows through the low-pressure manifold 8, through the hole of the suction threaded cap 10 and the liquid passage hole of the spring guide seat 14, and enters the pump chamber. When the plunger 1 moves forward, the volume of the pump chamber decreases. The suction assembly closes under the pressure in the pump chamber and the rebound of the suction spring 12. The discharge assembly opens under the pressure in the pump chamber by compressing the discharge spring 17. The high-pressure liquid flows out through the first chamber and the discharge assembly. During operation, the plunger 1 is sealed by the packing.

[0034] It should be noted that the O-ring 9, packing group 4 and spring mentioned above are all applications of existing technology.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A hydraulic end for a fracturing pump with long service life and easy processing, characterized in that: The pump head body (6) includes a pump head body (6), a plunger (1), a packing assembly, a low-pressure manifold (8), multiple suction assemblies, and multiple discharge assemblies. The pump head body (6) has multiple parallel and inverted T-shaped pump chambers inside. Each pump chamber includes a vertical chamber one and a horizontal chamber two. The plunger (1) is reciprocally movable at one end of the chamber two. The suction assembly is detachably disposed at the other end of the chamber two. The discharge assembly is detachably disposed in the upper end of the chamber one. The packing assembly is fitted onto the plunger (1) and located at the port of one end of the chamber two. The low-pressure manifold (8) is disposed on one side of the pump head body (6). The low-pressure manifold (8) and the other end of the chamber two are connected or closed through the suction assembly.

2. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 1, characterized in that: The suction assembly includes a suction threaded cap (10), a spring support seat (11), a suction spring (12), a suction valve body (13), a suction valve seat (7), and a spring guide seat (14). One end of the suction threaded cap (10) is detachably connected to the pump head body (6), and the other end of the suction threaded cap (10) is connected to the low-pressure manifold (8). The spring support seat (11), the suction spring (12), and the spring guide seat (14) are all located inside the suction threaded cap (10). The suction valve body (13) The suction valve seat (7) and the suction valve seat (7) are used to press the spring guide seat (14) and the suction valve body (13) together through the suction threaded cover (10). The suction valve body (13) has a long rod. The spring guide seat (14) and the suction spring (12) are both sleeved on the long rod. The tail end of the long rod is detachably connected to the spring support seat (11). The suction spring (12) is installed between the spring guide seat (14) and the spring support seat (11) for closing the liquid inlet valve. The spring guide seat (14) is provided with multiple liquid passage holes.

3. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 1, characterized in that: The discharge assembly includes a discharge valve seat (15), a discharge valve body (16), a discharge spring (17), a discharge cap (18), and a discharge threaded cap (19). The discharge threaded cap (19) is detachably connected to the port of the first cavity. The discharge cap (18) is located below the discharge threaded cap (19). The discharge spring (17) is disposed between the discharge cap (18) and the discharge valve body (16). The discharge valve seat (15) is disposed below the discharge valve body (16).

4. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 1, characterized in that: The packing assembly includes a packing box (2), a packing ring (3), a packing group (4), and a packing seat (5). The packing box (2) is detachably disposed at one end of the cavity two. The packing seat (5) is embedded in one end of the cavity two. The packing group (4), the packing ring (3), and the packing seat (5) are installed in the packing box (2). The packing box (2), the packing ring (3), the packing group (4), and the packing seat (5) are all fitted onto the plunger (1).

5. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 1, characterized in that: The interior of the suction threaded cap (10) is provided with a hollow columnar cavity structure, and four pairs of opposite holes are provided on the side wall. One end of the suction valve seat (7) is provided with a conical structure, and one end face of the suction threaded cap (10) is provided with a corresponding structure that works in cooperation with the conical structure.

6. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 1, characterized in that: The low-pressure manifold (8) is a cross-shaped pipeline structure. The low-pressure manifold (8) includes a horizontally placed pipe 1 and multiple vertical pipe 2. The pipe 1 and multiple pipe 2 are connected. The pipe 2 of the low-pressure manifold (8) is fitted onto multiple suction threaded caps (10).

7. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 2, characterized in that: The low-pressure manifold (8) and the suction threaded cap (10) have two grooves at their contact points, and an O-ring (9) is provided at one of the grooves. The low-pressure manifold (8) and the pump head body (6) have two grooves at their contact points, and an O-ring (9) is provided at the second groove.

8. The hydraulic end of a fracturing pump with long service life and easy processing according to claim 7, characterized in that: The packing box (2) and packing ring (3) are machined with lubricating oil holes for lubrication.

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