A wear-resistant fracturing pump plunger and fracturing pump

Abstract

The application discloses a kind of wear-resistant fracturing pump plunger, including plunger head, plunger head has the end face being arranged along self axial direction, the edge of end face is provided with taper face, the surface of taper face is provided with push block, push block is provided with multiple and evenly distributed on the surface of taper face, the side surface of plunger head is sleeved with plunger barrel, one end of plunger barrel is provided with the first screw rod connected with plunger head, plunger head is equipped with the cavity being coaxial with plunger head, cavity extends along the axial direction of plunger head, connecting rod is arranged in cavity, the end surface of connecting rod is provided with power rod, one end of power rod is provided with the fixed sleeve connected with connecting rod, connecting rod and fixed sleeve are circumferentially rotatable, axially fixed connection, the other end of power rod is fixedly connected with connector, and the application relates to the technical field of oil and gas equipment.The kind of wear-resistant fracturing pump plunger and fracturing pump, solve the situation that plunger bottom is prone to eccentric wear, reduce overall maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of oil and gas equipment technology, specifically to a wear-resistant fracturing pump plunger and a fracturing pump. Background Technology

[0002] In China, most oil extraction methods utilize formation water injection, and fracturing pumps are the primary equipment for achieving this. The hydraulic plunger, a core component of the fracturing pump, is installed between the power end and the hydraulic end. During its operation, it is subjected to alternating forces from the power end and directly withstands the high-pressure impacts from the hydraulic end.

[0003] The quality of fracturing pumps directly affects the technical level of fracturing operations in oil and gas fields. Most existing fracturing pumps are reciprocating horizontal multi-cylinder plunger pumps. During the reciprocating motion of the plunger, its own weight can cause uneven wear at the bottom, affecting the pump's lifespan. This necessitates replacing the entire plunger during later maintenance, increasing equipment costs and impacting operational efficiency. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a wear-resistant fracturing pump plunger and fracturing pump, which solves the problem of uneven wear at the bottom of the plunger and reduces overall maintenance costs.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant fracturing pump plunger, comprising a plunger head, the plunger head having an end face arranged along its own axial direction, a conical surface being provided at the edge of the end face, a pushing block being provided on the surface of the conical surface, the pushing block being provided in multiple and evenly distributed on the surface of the conical surface, a plunger sleeve being sleeved on the side of the plunger head, a first screw connected to the plunger head being provided at one end of the plunger sleeve, a cavity coaxial with the plunger head being provided inside the plunger head, the cavity extending along the axial direction of the plunger head, a connecting rod being provided inside the cavity, a power rod being provided at the end face of the connecting rod, a fixed sleeve being provided at one end of the power rod being connected to the connecting rod, the connecting rod and the fixed sleeve being circumferentially rotatable and axially fixedly connected, and a connecting head being fixedly connected to the other end of the power rod.

[0008] Preferably, the connecting rod is coaxially arranged with the plunger head, and the connecting rod is connected to the plunger head by a second screw.

[0009] Preferably, a limiting ring is fitted at one end of the connecting rod, and a thrust bearing is provided on the surface of the limiting ring, with one end of the fixing sleeve in contact with the surface of the thrust bearing.

[0010] Preferably, a fixing block is provided at one end of the limiting ring, a third screw is provided between the fixing block and the connecting rod, and a slot adapted to the fixing block is provided inside the fixing sleeve.

[0011] Preferably, a limiting ring is fixedly connected to the surface of the power rod and located inside the fixed sleeve, and the fixed sleeve is provided with a groove that matches the limiting ring.

[0012] Preferably, the surface of the plunger cylinder is provided with a wear-resistant and corrosion-resistant protective layer, one end of the plunger cylinder is provided with a positioning groove, and the outer diameter of the plunger cylinder is larger than the outer diameter of the plunger head.

[0013] Preferably, the surface of the push block is set as an inclined plane.

[0014] Preferably, the fixing sleeve consists of two semi-circular pieces, and the two semi-circular pieces are fixed with screws.

[0015] A fracturing pump includes: a drive unit, a hydraulic mechanism, and a wear-resistant fracturing pump plunger as described in any one of the claims. The hydraulic mechanism has a slide rail, the plunger is disposed in the slide rail and slidably connected to the slide rail, one end of the power rod extends to the outside of the hydraulic mechanism, and the hydraulic mechanism and the power rod are sealed together.

[0016] Preferably, a connecting rod is provided between the driving device and the connector, and the driving device drives the plunger to reciprocate through the connecting rod.

[0017] (III) Beneficial Effects

[0018] This invention provides a wear-resistant fracturing pump plunger and a fracturing pump. It has the following beneficial effects:

[0019] By using a wear-resistant fracturing pump plunger, a pushing block is set on the end face of the plunger head. During the movement of the plunger head, the pushing block receives lateral push, which allows the entire plunger head to rotate, avoiding wear at the bottom and ensuring uniform wear, thereby improving the service life of the fracturing pump. In addition, a plunger sleeve is fitted on the outside of the plunger head, and its surface is provided with a wear-resistant and corrosion-resistant protective layer, which improves the overall wear resistance. At the same time, only the plunger sleeve needs to be replaced during later maintenance, reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the plunger of the present invention;

[0021] Figure 2 This is a front view of the plunger of the present invention;

[0022] Figure 3 This is a right view of the plunger of the present invention;

[0023] Figure 4 This is a cross-sectional view of the plunger of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 This is a schematic diagram of the limiting ring structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the fracturing pump of the present invention.

[0027] In the diagram: 1-plunger head, 2-end face, 3-conical surface, 4-push block, 41-inclined surface, 5-plunger cylinder, 6-first screw, 7-cavity, 8-connecting rod, 9-second screw, 10-power rod, 11-fixed sleeve, 12-connector, 13-limiting ring, 14-limiting ring, 15-thrust bearing, 16-fixed block, 17-third screw, 18-drive device, 19-hydraulic mechanism, 20-slide rail, 21-connecting rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-7 This invention provides a technical solution: a wear-resistant fracturing pump plunger, including a plunger head 1, which is cylindrical and has an end face 2 arranged along its own axial direction. The end face 2 is used to contact high-pressure liquid. The plunger head 1 reciprocates along the axial direction to provide driving force for the flow of high-pressure liquid. A conical surface 3 is provided at the edge of the end face 2, and a pushing block 4 is provided on the surface of the conical surface 3. Multiple pushing blocks 4 are provided and evenly distributed on the surface of the conical surface 3. The surface of the pushing block 4 is set as an inclined surface 41. Because the surface of the pushing block 4 is set as an inclined surface, its surface area is large when pushing high-pressure liquid, and it is subjected to lateral force. Thus, during long-term reciprocating movement, the plunger head 1 can rotate around itself, thereby avoiding the problem of severe wear on one side, ensuring uniform surface wear, and improving the overall service life.

[0030] A plunger cylinder 5 is fitted on the side of the plunger head 1. One end of the plunger cylinder 5 is provided with a first screw 6 that connects to the plunger head 1. The plunger cylinder 5 and the plunger head 1 are interference-fitted to ensure the stability of the connection between the plunger cylinder 5 and the plunger head 1. During assembly, the plunger head 1 can be cooled and the plunger cylinder 5 can be heated to improve the ease of assembly. When the plunger cylinder 5 is worn and needs to be replaced, only the plunger cylinder 5 needs to be removed for replacement, thereby avoiding the need to replace the entire plunger head 1 and reducing maintenance costs.

[0031] The plunger head 1 has a cavity 7 coaxial with the plunger head 1, which extends along the axial direction of the plunger head 1. A connecting rod 8 is installed in the cavity 7, and the connecting rod 8 is coaxial with the plunger head 1. A second screw 9 is connected to the connecting rod 8 and the plunger head 1. The cavity 7 reduces the weight of the plunger head 1, thus reducing wear. A power rod 10 is installed at the end face of the connecting rod 8. A fixed sleeve 11 connected to the connecting rod 8 is installed at one end of the power rod 10. The connecting rod 8 and the fixed sleeve 11 are circumferentially rotatable and axially fixed. A connector 12 is fixedly connected to the other end of the power rod 10. The connection between the power rod 10 and the connecting rod 8 is achieved through the fixed sleeve 11, while ensuring that the plunger head 1 can rotate around its own axis.

[0032] A limiting ring 14 is fitted on one end of the connecting rod 8. A thrust bearing 15 is provided on the surface of the limiting ring 14. One end of the fixed sleeve 11 is in contact with the surface of the thrust bearing 15. The fixed sleeve 11 applies pressure to the connecting rod 8 through the limiting ring 14, thereby pushing the plunger head 1 to move.

[0033] A fixing block 16 is provided at one end of the limiting ring 14. A third screw 17 is provided between the fixing block 16 and the connecting rod 8. A slot adapted to the fixing block 16 is provided in the fixing sleeve 11. When installing the connecting rod 8, the second screw 9 is used to fix it first, then the limiting ring 14 is installed, and the thrust bearing 15 is installed on the limiting ring 14. Finally, the fixing block 16 is installed and fixed with the third screw 17.

[0034] A limiting ring 13 is fixedly connected to the surface of the power rod 10 and inside the fixed sleeve 11. The fixed sleeve 11 is provided with a slot that matches the limiting ring 13. Through the setting of the limiting ring 13 and the fixed block 16, a thrust can be provided when the power rod 10 moves, which drives the plunger head 1 to move.

[0035] The surface of the plunger cylinder 5 is provided with a wear-resistant and corrosion-resistant protective layer. One end of the plunger cylinder 5 is provided with a positioning groove. The outer diameter of the plunger cylinder 5 is larger than the outer diameter of the plunger head 1. The positioning groove can ensure that the plunger cylinder 5 is installed in place during installation. In addition, the positioning groove can also improve the stability of the plunger cylinder 5 during installation.

[0036] The fixing sleeve 11 consists of two semi-circular pieces, which are fixed with screws. When installing the fixing sleeve 11, first place one fixing sleeve 11 in the position corresponding to the limiting ring 13 and the fixing block 16, then close the other fixing sleeve 11, and finally tighten it with screws.

[0037] A fracturing pump includes: a drive unit 18, a hydraulic mechanism 19, and a wear-resistant fracturing pump plunger according to any one of claims 1 to 7. The hydraulic mechanism 19 is provided with a slide 20, the plunger is disposed in the slide 20 and slidably connected to the slide 20, one end of the power rod 10 extends to the outside of the hydraulic mechanism 19, and the hydraulic mechanism 19 and the power rod 10 are sealed together.

[0038] A connecting rod 21 is provided between the drive device 18 and the connector 12. The drive device 18 drives the plunger to move back and forth through the connecting rod 21 to realize the delivery of liquid. The drive device 18 can be an electric motor or an internal combustion engine.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant fracturing pump plunger, comprising a plunger head (1), the plunger head (1) having an end face (2) arranged along its own axial direction, a conical surface (3) provided at the edge of the end face (2), a pusher block (4) provided on the surface of the conical surface (3), the pusher block (4) being provided in multiple and evenly distributed on the surface of the conical surface (3), a plunger sleeve (5) sleeved on the side of the plunger head (1), a first screw (6) connected to the plunger head (1) being provided at one end of the plunger sleeve (5), the plunger head (1) A cavity (7) is provided inside, which is coaxial with the plunger head (1). The cavity (7) extends along the axial direction of the plunger head (1). A connecting rod (8) is provided inside the cavity (7). A power rod (10) is provided at the end face of the connecting rod (8). A fixed sleeve (11) is provided at one end of the power rod (10) and connected to the connecting rod (8). The connecting rod (8) and the fixed sleeve (11) are circumferentially rotated and axially fixedly connected. A connector (12) is fixedly connected to the other end of the power rod (10). One end of the connecting rod (8) is fitted with a limiting ring (14), and a thrust bearing (15) is provided on the surface of the limiting ring (14). One end of the fixing sleeve (11) is in contact with the surface of the thrust bearing (15). One end of the limiting ring (14) is provided with a fixing block (16), and a third screw (17) is provided between the fixing block (16) and the connecting rod (8). The fixing sleeve (11) is provided with a slot that is adapted to the fixing block (16).

2. The wear-resistant fracturing pump plunger according to claim 1, characterized in that: The connecting rod (8) is coaxially arranged with the plunger head (1), and the connecting rod (8) and the plunger head (1) are connected by a second screw (9).

3. The wear-resistant fracturing pump plunger according to claim 1, characterized in that: The surface of the power rod (10) and the fixed sleeve (11) are fixedly connected to the limiting block (13), and the fixed sleeve (11) is provided with a slot that matches the limiting block (13).

4. The wear-resistant fracturing pump plunger according to claim 1, characterized in that: The surface of the plunger cylinder (5) is provided with a wear-resistant and corrosion-resistant protective layer, and a positioning groove is provided at one end of the plunger cylinder (5). The outer diameter of the plunger cylinder (5) is larger than the outer diameter of the plunger head (1).

5. The wear-resistant fracturing pump plunger according to claim 1, characterized in that: The surface of the push block (4) is set as an inclined surface (41).

6. The wear-resistant fracturing pump plunger according to claim 1, characterized in that: The fixing sleeve (11) consists of two semi-circular pieces, and the two semi-circular pieces are fixed with screws.

7. A fracturing pump, characterized in that: include: The driving device (18), the hydraulic mechanism (19), and the wear-resistant fracturing pump plunger according to any one of claims 1 to 6, wherein the hydraulic mechanism (19) is provided with a slide (20), the plunger is disposed in the slide (20) and slidably connected to the slide (20), one end of the power rod (10) extends to the outside of the hydraulic mechanism (19), and the hydraulic mechanism (19) and the power rod (10) are sealed together.

8. A fracturing pump according to claim 7, characterized in that: A connecting rod (21) is provided between the drive device (18) and the connector (12), and the drive device (18) drives the plunger to move back and forth through the connecting rod (21).

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