A well drilling pump pressure regulator

Abstract

The application discloses a drilling pump pressure stabilizer and belongs to the technical field of fluid pressure stabilization. The technical scheme is characterized by comprising a flow divider, an attenuator and a flow stabilizer which are sequentially connected. The flow divider is provided with a first inlet, a first outlet, a second inlet and a second outlet which are used for being connected with a discharge pipe of the drilling pump. The flow divider is internally provided with a first cavity and a second cavity. The first inlet and the first outlet are both connected with the first cavity, and the second inlet and the second outlet are both connected with the second cavity. The attenuator is connected with the first outlet. The attenuator is internally provided with a plurality of buffer units. The buffer units comprise a communication section, an expansion section and a vortex cavity which are sequentially arranged. The inner diameter of the expansion section gradually increases along the fluid direction. The vortex cavity is arranged around the outer periphery of the communication section of the next buffer unit. The flow stabilizer is connected with the attenuator and the second inlet. The flow stabilizer is internally provided with a flow stabilizing assembly. The manufacturing cost is reduced, and the drilling pump can still realize stable and reliable fluid pressure stabilization under complex and severe working conditions.

Description

Technical Field

[0001] This application relates to the field of fluid pressure stabilization technology, and in particular to a drilling pump pressure stabilizer. Background Technology

[0002] Drilling pumps are core equipment in oil drilling operations, responsible for delivering drilling fluid through high-pressure pipelines to the drill bit, thus maintaining the normal operation of the drilling circulation system. Drilling fluid not only carries and removes cuttings from the bottom of the well, but also cools the drill bit and lubricates the drilling tools, playing a crucial role in ensuring the safety and efficiency of the drilling process. Therefore, the performance of the drilling pump directly affects the stability and reliability of the entire drilling project. As oil exploration and development continue to expand into complex environments such as deep seas and high-temperature, high-pressure areas, the requirements for drilling pump performance are also increasing.

[0003] During operation, because drilling pumps are driven by a crank-connecting rod mechanism, the instantaneous flow rate of the pump cylinder changes periodically with the crankshaft angle, causing unstable discharge flow and resulting in flow pulsation. To suppress this pressure pulsation, an air chamber is traditionally installed as a pressure stabilizing device. Alternatively, simple buffer structures are used, such as incorporating a certain length of curved pipe within the pipeline, to attempt to mitigate fluid fluctuations.

[0004] However, air-bag pressure stabilizing devices have several limitations in practical applications. The bladder is a vulnerable component, requiring regular inspection, maintenance, and replacement, increasing operating costs. Furthermore, the replacement process is complex, labor-intensive, and poses safety risks, especially during high-pressure disassembly, where the sudden release of accumulated energy could lead to accidents. Additionally, under extreme conditions such as deep water, high temperature, and high pressure, the pressure stabilizing performance of the air-bag is easily affected, its reliability and stability decrease, and it may even fail. Simple buffer structures have limited effectiveness in suppressing fluid pulsation under complex conditions and cannot meet the current stability requirements of drilling pumps in oil drilling operations. Summary of the Invention

[0005] In order to reduce manufacturing costs and ensure that drilling pumps can achieve stable and reliable fluid pressure stabilization under complex and harsh operating conditions, this invention provides a drilling pump pressure stabilizer.

[0006] The drilling pump pressure stabilizer provided by this invention adopts the following technical solution:

[0007] A drilling pump pressure regulator includes a flow divider, an attenuator, and a flow stabilizer connected in sequence;

[0008] The diverter has a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet is used to communicate with the discharge pipe of the drilling pump. The diverter has a first cavity and a second cavity that are isolated from each other. The first inlet and the first outlet are both connected to the first cavity, and the second inlet and the second outlet are both connected to the second cavity.

[0009] The inlet of the attenuator is connected to the first outlet of the splitter. The attenuator is provided with multiple buffer units that are connected in sequence along the fluid flow direction. Each buffer unit includes a connecting section, an expansion section and a vortex cavity arranged in sequence along the fluid direction. The inner diameter of the expansion section gradually increases along the fluid direction. The vortex cavity surrounds the outer periphery of the connecting section of the next buffer unit and is used to generate vortices in the fluid to consume energy.

[0010] The inlet of the flow stabilizer is connected to the outlet of the attenuator, and the outlet of the flow stabilizer is connected to the second inlet of the flow splitter; the flow stabilizer is equipped with a flow stabilization component inside, which is used to rectify and stabilize the fluid flowing through it.

[0011] By adopting the above technical solution, the fluid discharged from the drilling pump enters the first chamber from the first inlet of the distributor, and then flows out from the first outlet into the attenuator. Inside the attenuator, the fluid sequentially passes through the connecting section, expansion section, and vortex chamber of multiple buffer units. The expansion section disperses the fluid, and the vortex chamber generates vortices in the fluid to dissipate energy, thereby effectively attenuating pressure pulsations. The fluid then flows out of the attenuator into the flow stabilizer. The flow stabilizing components within the flow stabilizer rectify and stabilize the fluid, allowing it to flow out of the flow stabilizer outlet in a stable state. It then enters the second chamber through the second inlet of the distributor, and finally flows out from the second outlet. By utilizing the combination of the distributor, attenuator, and flow stabilizer to form a multi-stage pressure stabilization structure, highly efficient suppression of pressure and flow pulsations in the fluid discharged from the drilling pump is achieved, improving the operational reliability of the drilling pump and effectively reducing the failure rate caused by pressure fluctuations. Furthermore, the entire device requires no moving parts, has a robust and reliable structure, and is suitable for harsh operating conditions such as deep sea, high temperature, and high pressure, significantly reducing maintenance costs and safety risks.

[0012] Preferably, the angle α between the outlet axis of the vortex cavity and the axis of the attenuator is 51.7°.

[0013] By adopting the above technical solution, the fluid at the outlet of the vortex cavity flows out at a specific angle, which enhances the fluid vortex effect, consumes fluid energy more effectively, and further suppresses fluid pressure pulsation and flow fluctuation.

[0014] Preferably, the flow stabilizing component includes a flow stabilizing block, which is connected to the flow stabilizer and is used to separate the inlet and outlet of the flow stabilizer. Multiple flow pipes are provided through the flow stabilizing block, and both end faces of the flow stabilizing block along its axial direction are sloped.

[0015] By adopting the above technical solution, the flow stabilizer block is connected to the flow stabilizer and its inlet and outlet are separated. When in use, the fluid flows in from the inlet of the flow stabilizer and passes through multiple flow pipes that are opened on the flow stabilizer block. The slopes at both ends of the flow stabilizer block in the axial direction help to guide the fluid to enter and flow out of the flow pipes smoothly, thereby rectifying and stabilizing the fluid and making the fluid flowing out of the flow stabilizer more stable.

[0016] Preferably, the inner diameter of the flow channel is 70 mm and the length-to-diameter ratio is greater than 8.

[0017] By adopting the above technical solutions, the uniformity of the flow field inside the flow stabilizer can be effectively improved, and the fluid flowing through the flow stabilizer can be better rectified and stabilized.

[0018] Preferably, the distributor has a compensation channel that connects the first cavity and the second cavity, and is used to compensate the fluid inside the first cavity to the inside of the second cavity.

[0019] By adopting the above technical solution, the compensation channel can compensate the fluid inside the first cavity to the second cavity, ensuring that the second cavity has sufficient fluid and improving the voltage regulation effect of the voltage regulator.

[0020] Preferably, the diverter is connected to a cylindrical filter screen located within the first cavity, which is used to separate the first inlet from the first outlet.

[0021] By adopting the above technical solution, a cylindrical filter screen is set in the first cavity of the distributor to separate the first inlet and the first outlet, which can intercept large particulate impurities and prevent the flow channel from being blocked.

[0022] Preferably, a top bend is provided between the attenuator and the current stabilizer, with one end of the top bend connected to the outlet of the attenuator and the other end connected to the inlet of the current stabilizer.

[0023] By adopting the above technical solution, a top bend is installed between the attenuator and the flow stabilizer, which realizes the connection between the outlet of the attenuator and the inlet of the flow stabilizer, so that the fluid can flow smoothly from the attenuator into the flow stabilizer, ensuring the normal flow of fluid in the drilling pump pressure stabilizer.

[0024] Preferably, the attenuator and the splitter are fixedly connected by a first flange assembly, the first flange assembly including a first sealing steel ring disposed between the attenuator and the splitter.

[0025] By adopting the above technical solution, the first flange assembly and the first sealing steel ring can ensure high-pressure sealing between the attenuator and the distributor, reduce the possibility of fluid leakage, and improve the reliability and stability of the drilling pump pressure regulator.

[0026] Preferably, the flow stabilizer and the flow splitter are fixedly connected by a second flange assembly, the second flange assembly including a second sealing steel ring disposed between the flow stabilizer and the flow splitter.

[0027] By adopting the above technical solution, a stable connection between the voltage regulator and the distributor can be achieved. At the same time, the second sealing steel ring can ensure the sealing of the connection, reduce the possibility of fluid leakage, and improve the overall reliability and stability of the voltage regulator.

[0028] Preferably, the diverter is connected to a connecting pipe that communicates with the second cavity, and the connecting pipe is connected to a pressure gauge via a third flange assembly for measuring the fluid pressure inside the second cavity.

[0029] By adopting the above technical solution, the fluid pressure in the second chamber of the distributor of the drilling pump pressure regulator can be monitored in real time, which helps to grasp the working status of the pressure regulator and the changes in fluid pressure, and ensures the stable operation of the drilling pump.

[0030] In summary, the present invention has the following beneficial effects:

[0031] The fluid discharged from the drilling pump enters the first chamber through the first inlet of the distributor, and then flows out through the first outlet into the attenuator. Within the attenuator, the fluid sequentially passes through the connecting section, expansion section, and vortex chamber of multiple buffer units. The expansion section disperses the fluid, while the vortex chamber generates vortices to dissipate energy, effectively attenuating pressure pulsations. The fluid then flows out of the attenuator into the flow stabilizer. The flow stabilizing components within the flow stabilizer rectify and stabilize the fluid, ensuring it flows out of the flow stabilizer outlet in a stable state. It then enters the second chamber through the second inlet of the distributor, and finally flows out through the second outlet. By utilizing the distributor, attenuator, and flow stabilizer in combination to form a multi-stage pressure stabilization structure, the pressure and flow pulsations of the fluid discharged from the drilling pump are effectively suppressed, improving the reliability of the drilling pump and effectively reducing the failure rate caused by pressure fluctuations. Furthermore, the entire device requires no moving parts, is robust and reliable, and is suitable for harsh operating conditions such as deep sea, high temperature, and high pressure, significantly reducing maintenance costs and safety risks. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a drilling pump pressure stabilizer.

[0033] Figure 2 This is a schematic diagram showing the location of the second exit and the cleaning port.

[0034] Figure 3 This is a schematic diagram of the internal structure of a drilling pump pressure regulator.

[0035] Figure 4 The purpose is to show the included angle α.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Diverter; 11. First Inlet; 12. First Outlet; 13. Second Inlet; 14. Second Outlet; 15. Cleaning Port; 2. First Chamber; 21. Filter Screen; 3. Second Chamber; 4. Compensating Flow Channel; 5. Attenuator; 51. First Flange Assembly; 6. Buffer Unit; 61. Connecting Section; 62. Expansion Section; 63. Vortex Chamber; 7. Top Bend; 8. Flow Stabilizer; 81. Flow Stabilizer Assembly; 811. Flow Stabilizer Block; 812. Flow Pipe; 82. Second Flange Assembly; 9. Connecting Pipe; 91. Pressure Gauge; 92. Third Flange Assembly. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0039] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0040] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0041] A drilling pump pressure stabilizer, as described in the reference Figure 1 , Figure 2 and Figure 3The system comprises a flow divider 1, an attenuator 5, and a flow stabilizer 8 connected in sequence, forming a channel for fluid flow. The flow divider 1 contains a first chamber 2 and a second chamber 3, which are isolated from each other. The first chamber 2 is connected to the attenuator 5, which contains multiple buffer units 6 connected sequentially along the fluid flow direction to dissipate fluid energy. The second chamber 3 is connected to the flow stabilizer 8, which contains a flow stabilizing component 81 for rectifying and stabilizing the fluid flowing through it. The flow divider 1 has a compensation channel 4, whose two ends are connected to the first chamber 2 and the second chamber 3 respectively, for compensating the fluid in the first chamber 2 to the second chamber 3. By utilizing the combination of the flow divider 1, attenuator 5, flow stabilizer 8, and compensation channel 4 to form a multi-stage pressure stabilization structure, the system effectively suppresses pressure and flow pulsations in the fluid discharged from the drilling pump, improving the operational reliability of the drilling pump.

[0042] Reference Figure 1 , Figure 2 and Figure 3 The diverter 1 has a first inlet 11, a first outlet 12, a second inlet 13, and a second outlet 14. The first inlet 11 is connected to the discharge pipe of the drilling pump via a flange connection. Both the first inlet 11 and the first outlet 12 are connected to the first cavity 2, and both the second inlet 13 and the second outlet 14 are connected to the second cavity 3. The first cavity 2 and the second cavity 3 are separated by an internal partition, which is integrally formed with the diverter 1.

[0043] Reference Figure 3 The compensation channel 4 is horizontally positioned on the partition plate. With an inner diameter of 35mm, it serves as an auxiliary channel for the fluid, ensuring that the fluid always flows from the first chamber 2 into the second chamber 3. The flow rate within the compensation channel 4 exhibits a pulsating state, varying with the pressure difference between the first chamber 2 and the second chamber 3. The flow compensation effect is most pronounced when a pressure pulsation peak occurs in the first chamber 2 and a pressure pulsation trough occurs in the second chamber 3; the required flow compensation is minimal when the pressure values ​​of the first chamber 2 and the second chamber 3 are very close.

[0044] Reference Figure 2 and Figure 3 The diverter 1 is connected to a cylindrical filter screen 21, which is located inside the first cavity 2. The filter screen 21 separates the first inlet 11 from the first outlet 12, and the first inlet 11 is in communication with the interior of the filter screen 21. The filter screen 21 can be made of stainless steel and has many small pores on its surface, which can intercept large particles of impurities in the fluid, reducing the possibility of impurities entering the subsequent attenuator 5 and flow stabilizer 8 and causing blockage. The diverter 1 also has a cleaning port 15 corresponding to the first inlet 11. The cleaning port 15 is in communication with the first cavity 2, and one end of the filter screen 21 is snapped into the cleaning port 15. The cleaning port 15 is sealed with a flange cover to facilitate the cleaning of impurities inside the filter screen 21.

[0045] Reference Figure 1 The attenuator 5 and the distributor 1 are fixedly connected via a first flange assembly 51. The first flange assembly 51 includes a first flange (BX154 specification) and a first sealing steel ring (BX154 specification). The first flange is fixedly connected to the attenuator 5 and fastened to the distributor 1 with bolts. The first sealing steel ring is disposed between the first flange and the distributor 1, and the first sealing steel ring can ensure the sealing of the connection and reduce the possibility of fluid leakage.

[0046] Reference Figure 3 The inlet of attenuator 5 is connected to the first outlet 12 of distributor 1. Attenuator 5 contains multiple buffer units 6 arranged sequentially along the fluid flow direction; preferably, there are five buffer units 6. Each buffer unit 6 has a profile resembling a gold ingot in its axial cross-section. Each buffer unit 6 includes a connecting section 61, an expansion section 62, and a vortex cavity 63 arranged sequentially along the fluid direction. The inner diameter of the expansion section 62 gradually increases along the fluid direction. The vortex cavity 63 surrounds the outer periphery of the connecting section 61 of the next buffer unit 6, used to generate vortices in the fluid to dissipate energy. The inner wall of attenuator 5 is coated with a wear-resistant ceramic coating.

[0047] The connecting section 61 is a pipe with a circular cross-section, used to guide fluid into the expansion section 62. The inner diameter of the expansion section 62 gradually increases, which slows down the fluid velocity and reduces the pressure. The vortex cavity 63 is an annular cavity in which the fluid generates vortices during flow, thereby consuming energy and achieving the purpose of attenuating fluid pulsation.

[0048] Reference Figure 4 The angle α between the outlet axis of the vortex cavity 63 and the axis of the attenuator 5 is 51.7°. This specific angle α allows the fluid to better connect with the connecting section 61 of the next buffer unit 6 when it flows out of the vortex cavity 63, and also helps to form a stable vortex. In other cases, this angle α can also be adjusted appropriately according to actual needs.

[0049] Reference Figure 3 A top bend 7 is provided between the attenuator 5 and the flow stabilizer 8. One end of the top bend 7 is fixedly connected to the outlet of the attenuator 5, and the other end is fixedly connected to the inlet of the flow stabilizer 8. The top bend 7 can be made of seamless steel pipe, and its bending angle and radius are designed according to actual installation requirements. The function of the top bend 7 is to change the flow direction of the fluid, allowing the fluid to smoothly enter the flow stabilizer 8 from the attenuator 5.

[0050] Reference Figure 1 and Figure 3The flow stabilizer 8 and the flow divider 1 are fixedly connected via a second flange assembly 82. The outlet of the flow stabilizer 8 is connected to the second inlet 13 of the flow divider 1. The second flange assembly 82 includes a second flange (BX154 specification) and a second sealing steel ring (BX154 specification). The second flange is fixedly connected to the flow stabilizer 8 and is fastened to the flow divider 1 with bolts. The second sealing steel ring is disposed between the second flange and the flow divider 1, ensuring the sealing of the connection and reducing the possibility of fluid leakage.

[0051] Reference Figure 3 The flow stabilizer 8 has a flow stabilizing component 81 inside, used to rectify and stabilize the fluid flowing through it. The flow stabilizing component 81 includes a flow stabilizing block 811, which is fixedly connected to the inner wall of the flow stabilizer 8, and is used to separate the inlet and outlet of the flow stabilizer 8. Multiple flow channels 812 are formed through the flow stabilizing block 811. The number of flow channels 812 can be designed according to actual conditions; in this embodiment, seven are preferred. One flow channel 812 is located on the axis of the flow stabilizing block 811, and the other six are evenly distributed along the axial direction. The inner wall of the flow stabilizer 8 is coated with a wear-resistant ceramic coating.

[0052] Reference Figure 3 In this embodiment, the inner diameter of the flow pipe 812 is 70 mm, and the length-to-diameter ratio is greater than 8.

[0053] This dimensional design allows the fluid sufficient time and space to be rectified within the flow channel 812, improving flow stability. Of course, the inner diameter and length-to-diameter ratio of the flow channel 812 can also be adjusted according to actual needs in different application scenarios.

[0054] Reference Figure 3 The flow stabilizer 811 has two sloping ends along its axial direction. The sloping design of the flow stabilizer 811 allows the fluid to enter and exit the flow pipe 812 more smoothly. Multiple flow pipes 812 can distribute the fluid evenly, thereby achieving the effect of rectification and stabilization.

[0055] Reference Figure 1 The distributor 1 is connected to a connecting pipe 9, which is a right-angle bend. One end of the connecting pipe 9 is connected to the second chamber 3, and the other end is fixedly connected to a pressure gauge 91. The pressure gauge 91 can monitor the fluid pressure in the second chamber 3 in real time, allowing operators to understand the working status of the pressure regulator.

[0056] Reference Figure 1The distributor 1 and the connecting pipe 9 are connected and fixedly connected by a third flange assembly 92. The third flange assembly 92 includes a third flange (BX152 specification) and a third sealing steel ring (BX152 specification). The third flange is fixedly connected to the connecting pipe 9 and is fastened to the distributor 1 by bolts. The third sealing steel ring is located between the third flange and the distributor 1, and the third sealing steel ring can ensure the sealing of the connection and reduce the possibility of fluid leakage.

[0057] The implementation principle of this embodiment is as follows: The drilling pump pressure regulator achieves effective pressure stabilization of the fluid discharged from the drilling pump through the coordinated action of the flow divider 1, attenuator 5, flow stabilizer 8, and compensation channel 4. The flow divider 1 is responsible for introducing and initially distributing the fluid, and the filter screen 21 is used to intercept impurities; the fluid flows through the first outlet 12 to the interior of the attenuator 5 as the main channel, and through multiple buffer units 6, the fluid generates vortices and consumes energy, thereby reducing pressure pulsation. The flow stabilizer 8 uses the flow stabilizing block 811 to rectify and stabilize the fluid; the compensation channel 4 is an auxiliary channel for the fluid, always flowing from the first cavity 2 into the second cavity 3, maintaining the stability of the fluid inside the drilling pump pressure regulator and improving the pressure stabilization effect. The entire pressure regulator adopts a four-stage coordinated structure of flow divider-attenuator-flow stabilizer-compensation, combined with the uniquely designed buffer unit 6 and flow pipe 812 design, to achieve multi-modal suppression of pressure and flow pulsation of the fluid discharged from the drilling pump without the need for moving parts. Furthermore, the device is robust in structure and reliably sealed, making it suitable for harsh working conditions such as deep sea, high temperature and high pressure. It can significantly reduce maintenance costs and safety risks, and improve the working reliability of drilling pumps and the overall efficiency of drilling operations.

[0058] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drilling pump pressure stabilizer, characterized in that: It includes a shunt (1), an attenuator (5), and a current stabilizer (8) connected in sequence; The diverter (1) is provided with a first inlet (11), a first outlet (12), a second inlet (13), and a second outlet (14). The first inlet (11) is used to communicate with the discharge pipe of the drilling pump. The diverter (1) is provided with a first cavity (2) and a second cavity (3) that are isolated from each other. The first inlet (11) and the first outlet (12) are both connected to the first cavity (2), and the second inlet (13) and the second outlet (14) are both connected to the second cavity (3). The inlet of the attenuator (5) is connected to the first outlet (12) of the splitter (1). The attenuator (5) is provided with a plurality of buffer units (6) connected in sequence along the fluid flow direction. Each buffer unit (6) includes a connecting section (61), an expansion section (62) and a vortex cavity (63) arranged in sequence along the fluid direction. The inner diameter of the expansion section (62) gradually increases along the fluid direction. The vortex cavity (63) surrounds the outer periphery of the connecting section (61) of the next buffer unit (6) and is used to generate vortices in the fluid to consume energy. The inlet of the flow stabilizer (8) is connected to the outlet of the attenuator (5), and the outlet of the flow stabilizer (8) is connected to the second inlet (13) of the splitter (1); the flow stabilizer (8) is provided with a flow stabilizing component (81) inside, which is used to rectify and stabilize the fluid flowing through it.

2. A drilling pump pressure stabilizer according to claim 1, characterized in that: The angle α between the outlet axis of the vortex cavity (63) and the axis of the attenuator (5) is 51.7°.

3. A drilling pump pressure stabilizer according to claim 1, characterized in that: The flow stabilizing component (81) includes a flow stabilizing block (811), which is connected to the flow stabilizer (8) and is used to separate the inlet and outlet of the flow stabilizer (8). Multiple flow pipes (812) are provided through the flow stabilizing block (811), and both end faces of the flow stabilizing block (811) along its axial direction are sloped.

4. A drilling pump pressure stabilizer according to claim 3, characterized in that: The inner diameter of the flow channel (812) is 70 mm, and the length-to-diameter ratio is greater than 8.

5. A drilling pump pressure stabilizer according to any one of claims 1-3, characterized in that: The distributor (1) has a compensation channel (4) inside, which connects the first cavity (2) and the second cavity (3) to compensate the fluid inside the first cavity (2) to the inside of the second cavity (3).

6. A drilling pump pressure stabilizer according to claim 1, characterized in that: The diverter (1) is connected to a cylindrical filter (21), which is located inside the first cavity (2) and is used to separate the first inlet (11) from the first outlet (12).

7. A drilling pump pressure stabilizer according to claim 1, characterized in that: A top bend (7) is provided between the attenuator (5) and the current stabilizer (8). One end of the top bend (7) is connected to the outlet of the attenuator (5), and the other end is connected to the inlet of the current stabilizer (8).

8. A drilling pump pressure stabilizer according to claim 1, characterized in that: The attenuator (5) and the splitter (1) are fixedly connected by a first flange assembly (51), the first flange assembly (51) including a first sealing steel ring disposed between the attenuator (5) and the splitter (1).

9. A drilling pump pressure stabilizer according to claim 1, characterized in that: The flow stabilizer (8) and the flow divider (1) are fixedly connected by a second flange assembly (82), the second flange assembly (82) including a second sealing steel ring disposed between the flow stabilizer (8) and the flow divider (1).

10. A drilling pump pressure stabilizer according to claim 1, characterized in that: The diverter (1) is connected to a connecting pipe (9) that communicates with the second cavity (3). The connecting pipe (9) is connected to a pressure gauge (91) via a third flange assembly (92) for measuring the fluid pressure inside the second cavity (3).

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