A rigid pressure stabilizing device for an oil drilling pump

Abstract

The present application discloses a rigid pressure stabilizing device for an oil drilling pump, belonging to the field of oil drilling equipment. The key technical points of its technical solution include a housing, a separating ring, and a fixing column. Among them, the housing is provided with an inlet and outlet hole for fluid to enter and exit, which is communicated with the discharge pipe of the drilling pump; the separating ring divides the interior of the housing into a first space and a second space, and the two are communicated through a communication hole. A plurality of annular first fins are arranged in the first space, alternately arranged and provided with shunt holes, which helps to stabilize the fluid pressure; a plurality of annular second fins are arranged in the second space, also alternately arranged and provided with shunt holes. The inlet and outlet hole, the first space, the communication hole, and the second space form a circulation channel for fluid to circulate, achieving the effect of improving the working reliability of the drilling pump and effectively reducing the failure rate caused by pressure fluctuations.

Description

Technical Field

[0001] This application relates to the field of oil drilling equipment, and particularly to a rigid pressure stabilizing device for an oil drilling pump. Background Art

[0002] At present, the drilling pump is an essential key equipment in the oil drilling process, mainly responsible for transporting the drilling fluid through a high-pressure pipeline to the bottom of the drill bit to maintain the circulation system of the entire drilling operation. The drilling fluid not only helps to remove cuttings and waste, but also cools the drill bit to ensure the safe and efficient operation of the drilling operation. Therefore, the performance of the drilling pump is crucial for the entire drilling project.

[0003] During the operation of the drilling pump, due to the motion mode of its crank-link mechanism, the instantaneous flow rate of the pump cylinder will change continuously with the motion of the drilling pump crank. This change leads to fluctuations in the discharge flow rate, that is, the so-called flow pulsation. Due to the existence of flow pulsation, the pressure in the discharge pipeline of the drilling pump will fluctuate periodically, which in turn causes a series of negative effects and is the main cause of failures of the drilling pump. To solve the problem of pressure pulsation of the drilling pump, an air chamber pressure stabilizing device is usually used to relieve the pressure fluctuation.

[0004] However, the air chamber pressure stabilizing device has some obvious limitations: 1) High maintenance and replacement costs: The air chamber capsule, as a vulnerable part, needs to be inspected, maintained and replaced regularly. 2) The process of replacing the air chamber capsule is cumbersome and labor-intensive, and when the operation is improper, there may be potential safety hazards. Especially in a high-pressure environment, it is easy to cause energy release when disassembling the air chamber capsule, resulting in safety accidents. 3) Poor adaptability: In extreme environments (such as deep water, high temperature, high pressure, etc.), the performance of the air chamber pressure stabilizing device will be affected to a certain extent and cannot effectively adapt to these complex working conditions. Especially in a high-pressure environment, the stability and reliability of the air chamber system are poor and it is easy to fail. Therefore, how to effectively solve the problem of pressure fluctuation of the drilling pump under complex working conditions has become an urgent technical challenge. Summary of the Invention

[0005] In order to improve the working reliability of the drilling pump and effectively reduce the failure rate caused by pressure fluctuation, the present invention provides a rigid pressure stabilizing device for an oil drilling pump.

[0006] The technical solution adopted by the rigid pressure stabilizing device for an oil drilling pump provided by the present invention is as follows:

[0007] A rigid pressure stabilizing device for an oil drilling pump, comprising a housing, a separating ring and a fixing column. The housing is provided with an inlet / outlet hole for fluid inlet and outlet. The housing is communicated with the discharge pipe of the drilling pump through the inlet / outlet hole. The separating ring is arranged inside the housing. The end wall of the separating ring is connected to the end of the housing away from the inlet / outlet hole, and divides the interior of the housing into a first space and a second space. The first space surrounds the second space. One end of the housing close to the inlet / outlet hole is further provided with an inlet / outlet channel, which communicates the first space and the second space and is communicated with the inlet / outlet hole. A communication hole is opened at one end of the separating ring away from the inlet / outlet hole, which communicates the first space and the second space. The inlet / outlet hole, the inlet / outlet channel, the first space, the communication hole and the second space form a circulation channel for fluid to circulate. A plurality of annular first fins are arranged in the first space. The first fins are sleeved outside the separating ring. There is a gap between the outer wall of the first fin and the housing, and there is a gap between the inner wall of the first fin and the separating ring. The first fin is inclined in a direction away from the inlet / outlet hole from one end close to the housing to the other end. A plurality of the first fins are evenly distributed along the axis direction of the separating ring. The plurality of first fins are evenly divided into a first group and a second group. The first fins of the first group and the first fins of the second group are arranged alternately. A plurality of first diversion holes are opened on the first fins in the first group, and the plurality of first diversion holes are distributed along the outer edge of the first fin. The fixing column is arranged in the second space and connected to the housing. The axis of the fixing column is parallel to the axis of the separating ring. A plurality of annular second fins are arranged in the second space. The inner wall of the second fin is connected to the fixing column. There is a gap between the outer wall of the second fin and the separating ring. The second fin is inclined in a direction close to the inlet / outlet hole from one end close to the fixing column to the other end. A plurality of the second fins are evenly distributed along the axis direction of the separating ring. The plurality of second fins are evenly divided into a third group and a fourth group. The second fins of the third group and the second fins of the fourth group are arranged alternately. A plurality of second diversion holes are opened on the second fins in the third group, and the plurality of second diversion holes are distributed along the outer edge of the second fin.

[0008] By adopting the above technical solution, the housing is divided into a first space and a second space by an isolation ring, enabling the fluid to circulate efficiently between the two regions. The rapid energy transfer and smooth flow regulation are achieved through the communication holes. Specifically, when the fluid passes through the first fin and the second fin, the fluid is split into two streams at the first group of first fins or the third group of second fins, and then the two streams of fluid converge again at the adjacent second group of first fins or the fourth group of second fins. The design of the first diversion hole and the second diversion hole, as well as the special inclined design of the first fin and the second fin, form a Tesla valve structure, which accelerates and obstructs the fluid flow, further enhancing the fluid flow control ability in different directions, thus better absorbing and releasing energy, and reducing the pressure pulsation and flow rate change in the system.

[0009] When the pressure of the discharge pipe of the drilling pump increases, a part of the fluid in the discharge pipe will enter the first space, thus releasing the pressure of the main pipeline; when the pressure of the main manifold decreases, the fluid inside the device enters the discharge pipe of the drilling pump from the second space to compensate for the low pressure and ensure the stability of the system pressure. If there is a reverse flow of the fluid inside the housing, the flow directions of the two streams of fluid are opposite, and the reverse-flowing fluid will encounter a huge resistance. Therefore, there can only be one flow direction inside the housing.

[0010] In summary, the rigid pressure stabilizing device of the oil drilling pump has no moving parts, so it does not require regular maintenance, has a long service life, and has higher reliability. The rigid pressure stabilizing device not only breaks through the bottleneck of the existing pressure stabilizing technology, but also can improve the performance of the drilling pump, reduce the cost of drilling operations, and improve the safety and efficiency of drilling construction.

[0011] Preferably, the axial direction of the isolation ring is the x-axis, and the included angle between the first fin and the x-axis is 52 degrees.

[0012] By adopting the above technical solution, when there are pressure fluctuations and flow pulsations in the discharge pipe manifold of the drilling pump, the fluid can effectively disperse the pressure and reduce the impact force when passing through the pressure stabilizing device, thereby improving the stability and reliability of the entire system. And through simulation tests, the design of the first fin at 52 degrees has a good effect on dispersing pressure. At the same time, this design helps to optimize the fluid flow path, reduce energy loss, and improve work efficiency.

[0013] Preferably, the radial direction of the isolation ring is the y-axis, and the ratio of the projection of the first fin on the x-axis to that on the y-axis is 0.35.

[0014] By adopting the above technical solutions, this specific ratio can optimize the distribution and re-convergence process of the fluid in the branch, thereby enhancing the unidirectional flow-guiding performance of the Tesla valve structure and improving the overall efficiency of the voltage stabilization device. This geometric parameter optimizes the dynamic characteristics of the fluid, enabling the device to maintain a good voltage stabilization effect under high-pressure environments and improving the operating efficiency and reliability of the entire system.

[0015] Preferably, at least eight first fin plates are provided.

[0016] By adopting the above technical solutions, providing at least eight first fin plates can significantly improve the stability and fluidity of the fluid inside the device. Specifically, the design of multiple first fin plates enables the fluid to be more evenly distributed during the circulation process, reducing local pressure fluctuations and flow pulsations, thereby effectively enhancing the stability of the entire system. At the same time, the complex flow channel structure formed by the staggered arrangement of multiple groups of first fin plates further enhances the energy absorption and release capabilities of the fluid, ensuring a good voltage stabilization effect under different working conditions.

[0017] Preferably, the axial direction of the isolation ring is the x-axis, and the angle between the second fin plate and the x-axis is 52 degrees.

[0018] By adopting the above technical solutions, the design of the angle between the second fin plate and the x-axis causes a specific angular change in the fluid inside the device when passing through the second fin plate. Through simulation, the 52-degree angle design ensures that the fluid can obtain a better velocity distribution in the vertical direction when passing through the second fin plate, reducing the turbulent flow phenomenon and improving the fluid transmission efficiency. This design helps to improve the device's response ability to pressure fluctuations and flow pulsations, enabling the device to more effectively absorb and release energy and stabilize the pressure and flow rate of the main pipeline.

[0019] Preferably, the radial direction of the isolation ring is the y-axis, and the ratio of the projection of the second fin plate on the x-axis to that on the y-axis is 0.35.

[0020] By adopting the above technical solutions, this specific ratio can optimize the distribution and re-convergence process of the fluid in the branch, thereby enhancing the unidirectional flow-guiding performance of the Tesla valve structure and improving the overall efficiency of the voltage stabilization device. At the same time, this ratio also helps to reduce the vortices and turbulences generated during the fluid flow process, further enhancing the stability and reliability of the system.

[0021] Preferably, at least eight second fin plates are provided.

[0022] By adopting the above technical solution, at least four second wing plates are provided in the third group, and at least four second wing plates are provided in the fourth group. When pressure fluctuations and flow pulsations occur in the discharge manifold of the drilling pump, the pressure stabilizing device can effectively absorb and release energy. Specifically: The design of multiple second wing plates not only increases the complexity of the fluid path, effectively reduces the pressure loss caused by a single path, but also enables the fluid to be more evenly distributed between each segment, thereby further enhancing the overall stability and pressure resistance of the device. This design is particularly suitable for drilling operation environments that require long-term continuous operation and are sensitive to pressure fluctuations.

[0023] Preferably, a baffle is provided inside the housing. There is a gap between the baffle and the housing, and the baffle is connected to the housing through fixing rods. The baffle can block the inlet and outlet holes.

[0024] By adopting the above technical solution, the design of the baffle can play a guiding and buffering role in the fluid flow at the inlet and outlet holes, reducing the possibility of the fluid directly impacting the inlet and outlet holes, thereby reducing the impact of pressure fluctuations. At the same time, the baffle can reduce the possibility of large debris entering the flow channel and then blocking the flow channel.

[0025] In summary, the present invention has the following beneficial effects:

[0026] The isolation ring is used to divide the housing into a first space and a second space, enabling the fluid to circulate efficiently between the two regions. Fast energy transfer and smooth flow regulation are achieved through the communication holes. Specifically: When the fluid passes through the first wing plates and the second wing plates, the fluid is divided into two streams at the first wing plates of the first group or the second wing plates of the third group. Subsequently, the two streams of fluid re-converge at the adjacent first wing plates of the second group or the second wing plates of the fourth group. The design of the first diversion hole and the second diversion hole, as well as the special inclined design of the first wing plates and the second wing plates, form a Tesla valve structure, which accelerates and obstructs the fluid flow, further enhancing the fluid flow control ability in different directions, thereby better absorbing and releasing energy, and reducing the pressure pulsation and flow rate change in the system. When the pressure of the drilling pump discharge pipe increases, a part of the fluid in the discharge pipe will enter the first space, thereby releasing the pressure on the main pipeline; when the pressure of the main manifold decreases, the fluid inside the device enters the drilling pump discharge pipe from the second space to compensate for the low pressure and ensure the stability of the system pressure. If there is reverse flow of the fluid inside the housing, the flow directions of the two streams of fluid are opposite, and the reverse-flowing fluid will encounter great resistance. Therefore, there can only be one flow direction inside the housing.

[0027] In summary, the rigid pressure stabilizing device of the oil drilling pump has no moving parts, so it does not require regular maintenance, has a long service life, and has higher reliability. The rigid pressure stabilizing device not only breaks through the bottleneck of the existing pressure stabilizing technology, but also can improve the performance of the drilling pump, reduce the cost of drilling operations, and improve the safety and efficiency of drilling construction. Brief Description of the Drawings

[0028] Figure 1 FIG. is a schematic diagram of the overall structure of a rigid pressure stabilizing device for an oil drilling pump.

[0029] Figure 2 FIG. is a schematic diagram of the positions of the isolation ring, the first wing plate and the second wing plate.

[0030] Figure 3 FIG. is a schematic diagram of the interior of the housing.

[0031] Figure 4 FIG. is a top view of the isolation ring, the first wing plate and the second wing plate.

[0032] Figure 5 FIG. is a bottom view of the isolation ring, the first wing plate and the second wing plate.

[0033] Figure 6 FIG. is the internal flow velocity distribution diagram of the rigid pressure stabilizing device for an oil drilling pump.

[0034] Figure 7 FIG. is the flow velocity distribution diagram of the longitudinal section of the rigid pressure stabilizing device for an oil drilling pump.

[0035] Figure 8 It is intended to show the simulation pressure extraction position.

[0036] Figure 9 is Figure 8 the pressure simulation diagram of the extraction position in

[0037] Description of the Reference Numerals:

[0038] 1. Housing; 11. Gland; 12. Shell; 13. Inlet and outlet hole; 2. First space; 3. Second space; 4. Isolation ring; 41. Communication hole; 5. First wing plate; 51. First diversion hole; 6. Second wing plate; 61. Second diversion hole; 7. Baffle; 71. Fixed rod; 8. Fixed column; 9. Connecting flange. Detailed Embodiments

[0039] In order 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 in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments.

[0040] In the description of the embodiments of the present application, words such as "for example" or "for illustration" are used to give examples, illustrations or explanations. Any embodiment or design solution described as "for example" or "for illustration" in the embodiments of the present application should not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "for example" or "for illustration" is intended to present the relevant concepts in a specific manner.

[0041] In the description of the embodiments of the present application, the term "a plurality of" means two or more. For example, a plurality of systems means two or more systems, and a plurality of screen terminals means two or more screen terminals. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the technical features indicated. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0042] A rigid pressure stabilizing device for an oil drilling pump, referring to Figure 1 , Figure 2 and Figure 3 , includes a housing 1, an isolation ring 4 and a fixing column 8. An inlet and outlet hole 13 for fluid to enter and exit is provided on the housing 1, and the housing 1 is communicated with the discharge pipe of the drilling pump through the inlet and outlet hole 13. The end wall of the isolation ring 4 is fixedly connected to the inner wall of the housing 1 at the end away from the inlet and outlet hole 13, and the axis of the isolation ring 4 coincides with the axis of the housing 1. The isolation ring 4 can divide the interior of the housing 1 into a first space 2 and a second space 3, and the first space 2 is sleeved around the periphery of the second space 3. A communication hole 41 is provided at one end of the isolation ring 4 away from the inlet and outlet hole 13, which can communicate the first space 2 and the second space 3. An inlet and outlet channel is provided at one end of the housing 1 close to the inlet and outlet hole 13, and the inlet and outlet channel communicates the first space 2 and the second space 3. The inlet and outlet channel is communicated with the inlet and outlet hole 13. The inlet and outlet hole 13, the inlet and outlet channel, the first space 2, the communication hole 41 and the second space 3 form a circulation channel for the fluid to circulate.

[0043] Referring to Figure 2 , Figure 3 and Figure 4 , a plurality of annular first fins 5 are provided in the first space 2. The first fins 5 are sleeved outside the isolation ring 4, and there is a gap between the outer wall of the first fins 5 and the inner side wall of the housing 1 and between the inner wall of the first fins 5 and the isolation ring 4. The first fins 5 are inclined in a direction away from the inlet and outlet hole 13 from the end close to the housing 1 to the other end.

[0044] A plurality of first wing plates 5 are evenly distributed along the axis direction of the isolation ring 4, and are evenly divided into a first group and a second group. The first wing plates 5 of the first group and the first wing plates 5 of the second group are arranged alternately along the axis direction of the isolation ring 4. A plurality of first diversion holes 51 are formed in the first wing plates 5 within the first group, and the plurality of first diversion holes 51 are evenly distributed along the outer edge of the first wing plates 5. No first diversion holes 51 are formed in the first wing plates 5 within the second group.

[0045] Refer to Figure 2 、 Figure 3 and Figure 5 , the fixing column 8 is arranged within the second space 3 and is fixedly connected to the outer shell 1. The axis of the fixing column 8 coincides with the axis of the isolation ring 4. A plurality of annular second wing plates 6 are arranged within the second space 3. The second wing plates 6 are sleeved on the fixing column 8, and there is a gap between the inner wall of the second wing plates 6 and the fixing column 8 and between the outer wall of the second wing plates 6 and the isolation ring 4. The second wing plates 6 are inclined from the end close to the fixing column 8 to the end close to the inlet / outlet hole 13.

[0046] A plurality of second wing plates 6 are evenly distributed along the axis direction of the isolation ring 4, and are evenly divided into a third group and a fourth group. The second wing plates 6 of the third group and the second wing plates 6 of the fourth group are arranged alternately along the axis direction of the isolation ring 4. A plurality of second diversion holes 61 are formed in the second wing plates 6 within the third group, and the plurality of second diversion holes 61 are evenly distributed along the outer edge of the second wing plates 6. No second diversion holes 61 are formed in the second wing plates 6 within the fourth group.

[0047] The double-layer space structure formed by the cooperation of the outer shell 1 and the isolation ring 4, and the communication hole 41 between the first space 2 and the second space 3 construct an efficient circulation channel, enabling the device to store excess mud when the pressure in the main pipeline increases and supplement mud when the pressure decreases, thereby achieving pressure stability. The design of the first wing plates 5 and the second wing plates 6, especially their inclination angles and staggered arrangement patterns, further optimize the distribution and guidance of the fluid, reduce eddy currents and energy losses, and improve the stability of the entire system. The diversion holes distributed on the wing plates of the first group and the third group increase the complexity of the flow channel, contribute to refining the fluid movement trajectory, and enhance the energy absorption capacity and flow regulation capacity of the device. In summary, the rigid pressure stabilization device for oil drilling pumps provided by this solution significantly improves the accuracy of pressure control and the safety and reliability of system operation during the drilling operation.

[0048] Refer to Figure 1 and Figure 3 , the outer shell 1 includes a gland 11 and a housing 12. The gland 11 and the housing 12 are fixedly connected by bolts. The inlet / outlet hole 13 is formed on the side away from the gland 11.

[0049] Refer to Figure 2, both the isolation ring 4 and the fixing post 8 are fixedly connected to the gland 11, and the axes of the isolation ring 4, the fixing post 8, and the housing 12 coincide.

[0050] Refer to Figure 1 , the housing 12 is fixedly connected with a connecting flange 9 through bolts, and the connecting flange 9 is fixedly connected to the discharge pipe of the drilling pump, so that the inside of the housing 12 is communicated with the inside of the discharge pipe. A sealing steel ring is arranged between the connecting flange 9 and the housing 12, and one side of the sealing steel ring abuts against the connecting flange 9 and the other side abuts against the housing 12.

[0051] Refer to Figure 3 , the numbers of the first fin plates 5 and the second fin plates 6 are both set according to the actual situation, and are preferably at least eight. In this embodiment, the first fin plates 5 are set to ten, the first group includes five first fin plates 5, and the second group includes five first fin plates 5. The second fin plates 6 are set to ten, the third group includes five second fin plates 6, and the fourth group includes five second fin plates 6.

[0052] Refer to Figure 3 , Figure 6 and Figure 7 , the first fin plates 5 and the second fin plates 6 have the same inclination direction, and together with the alternately arranged flow splitting holes, a Tesla valve structure is formed, which accelerates the flow of the fluid and hinders it, further enhancing the flow control ability of the fluid in different directions, so as to better absorb and release energy, and reduce the pressure pulsation and flow rate change in the system.

[0053] Specifically, the first fin plates 5 in the first group can split the fluid into two streams, one stream flows through the gap between the first fin plates 5 and the isolation ring 4, and the other stream flows through the first flow splitting hole 51; then the two streams of fluid converge again at the first fin plates 5 of the second group adjacent to it. The fluid continuously repeats the above path during the flow process, forming a Tesla valve structure to achieve the effect of acceleration. Similarly, the second fin plates 6 in the third group can split the fluid into two streams, one stream flows through the gap between the second fin plates 6 and the isolation ring 4, and the other stream flows through the second flow splitting hole 61; then the two streams of fluid converge again at the second fin plates 6 of the fourth group adjacent to it. The fluid continuously repeats the above path during the flow process, forming a Tesla valve structure to achieve the effect of acceleration.

[0054] If the fluid flows in the reverse direction, when the fluid converges at the first fin plates 5 of the second group or the second fin plates 6 of the fourth group, the flow directions of the two streams of fluid are opposite, resulting in a huge resistance; therefore, there can only be one flow direction inside the device.

[0055] Refer to Figure 3 , the axial direction of the isolation ring 4 is the x-axis, and the radial direction of the isolation ring 4 is the y-axis.

[0056] Refer toFigure 3 The included angle between the first wing plate 5 and the x-axis is 52 degrees. The ratio of the projection of the first wing plate 5 on the x-axis to that on the y-axis is 0.35.

[0057] This design enables the voltage stabilizing device to more effectively form a pressure buffer zone and a flow release zone when there are pressure fluctuations and flow pulsations in the discharge manifold of the drilling pump. Specifically, the 52-degree included angle design helps optimize the flow path of the fluid on the first wing plate 5, reduce energy loss, and improve fluid directivity; while the geometric parameter with an aspect ratio of 0.35 further enhances the control ability of the first wing plate 5 on the fluid, ensuring a more balanced distribution of the fluid between the internal and external circulation channels, thereby enhancing the pressure absorption and release effects of the entire device on the main pipeline fluid flow.

[0058] Refer to Figure 3 The included angle between the second wing plate 6 and the x-axis is designed to be 52 degrees, enabling the fluid to form an effective guiding effect when passing through the second space 3, reducing the impact force of the fluid on the second wing plate 6, and thus improving the stability of the device. At the same time, the ratio of the projection of the second wing plate 6 on the x-axis to that on the y-axis is set to 0.35, optimizing the flow path of the fluid in the second space 3, further enhancing the adjustment ability of the device to fluid pressure fluctuations and flow pulsations, and improving the overall energy balance effect.

[0059] Refer to Figure 3 Inside the housing 1, there is a baffle 7. There is a gap between the baffle 7 and the housing 1, and it is connected to the housing 1 through a fixing rod 71. The baffle 7 can block the inlet and outlet holes 13.

[0060] The design of the baffle 7 can play a guiding and buffering role in the fluid flow at the inlet and outlet holes 13, reducing the possibility of the fluid directly impacting the inlet and outlet holes 13, thereby reducing the influence of pressure fluctuations. At the same time, the baffle 7 can reduce the possibility of large debris entering the circulation channel and then blocking the flow channel.

[0061] Refer to Figure 8 and Figure 9 Tests were respectively carried out at the extraction positions on both sides of the voltage stabilizing device, and the waveform diagram with time as the horizontal axis and pressure as the vertical axis in Figure 9 was obtained.

[0062] The working principle of this application is as follows: First, connect the voltage stabilizing device in this application to the discharge pipe of the drilling pump. When the fluid encounters an obstacle in the flow passage, it separates, resulting in the generation of local eddies. These eddies help to dissipate a certain amount of flow energy, thereby reducing the flow fluctuations of the fluid. Therefore, the first fin 5 and the second fin 6 have the same inclination direction, and together with the alternately arranged shunt holes, a Tesla valve structure is formed, which accelerates and obstructs the fluid flow, further enhancing the fluid flow control ability in different directions, so as to better absorb and release energy, reducing the pressure pulsation and flow rate change in the system.

[0063] When the pressure of the drilling pump discharge pipe increases, part of the fluid in the discharge pipe will enter the first space 2, thereby releasing the pressure of the main pipeline.

[0064] When the pressure of the main manifold decreases, the fluid inside the device enters the drilling pump discharge pipe from the second space 3 to compensate for the low pressure and ensure the stability of the system pressure.

[0065] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rigid voltage stabilizing device for an oil drilling pump, characterized in that: It includes a housing (1), a separating ring (4) and a fixing column (8). An inlet and outlet hole (13) for fluid to enter and exit is provided on the housing (1). The housing (1) is communicated with the discharge pipe of the drilling pump through the inlet and outlet hole (13). The separating ring (4) is arranged inside the housing (1). The end wall of the separating ring (4) is connected to the end of the housing (1) away from the inlet and outlet hole (13), and divides the interior of the housing (1) into a first space (2) and a second space (3). The first space (2) is sleeved on the periphery of the second space (3). One end of the housing (1) close to the inlet and outlet hole (13) is also provided with an inlet and outlet channel. The inlet and outlet channel communicates the first space (2) and the second space (3), and the inlet and outlet channel is communicated with the inlet and outlet hole (13). A communication hole (41) is opened at one end of the separating ring (4) away from the inlet and outlet hole (13). The communication hole (41) communicates the first space (2) and the second space (3). The inlet and outlet hole (13), the inlet and outlet channel, the first space (2), the communication hole (41) and the second space (3) form a circulation channel for fluid to circulate. A plurality of annular first fin plates (5) are arranged in the first space (2). The first fin plates (5) are sleeved on the outer side of the separating ring (4). The outer wall of the first fin plate (5) is connected to the housing (1). A gap is left between the inner wall of the first fin plate (5) and the separating ring (4). The first fin plate (5) is inclined in the direction away from the inlet and outlet hole (13) from one end close to the housing (1) to the other end. The plurality of first fin plates (5) are evenly distributed along the axis direction of the separating ring (4). The plurality of first fin plates (5) are evenly divided into a first group and a second group. The first fin plates (5) of the first group and the first fin plates (5) of the second group are arranged alternately. A plurality of first diversion holes (51) are opened on the first fin plates (5) in the first group. The plurality of first diversion holes (51) are distributed along the outer edge of the first fin plate (5). The fixing column (8) is arranged in the second space (3) and connected to the housing (1). The axis of the fixing column (8) is parallel to the axis of the separating ring (4). A plurality of annular second fin plates (6) are arranged in the second space (3). The inner wall of the second fin plate (6) is connected to the fixing column (8). A gap is left between the outer wall of the second fin plate (6) and the separating ring (4). The second fin plate (6) is inclined in the direction close to the inlet and outlet hole (13) from one end close to the fixing column (8) to the other end. The plurality of second fin plates (6) are evenly distributed along the axis direction of the separating ring (4). The plurality of second fin plates (6) are evenly divided into a third group and a fourth group. The second fin plates (6) of the third group and the second fin plates (6) of the fourth group are arranged alternately. A plurality of second diversion holes (61) are opened on the second fin plates (6) in the third group. The plurality of second diversion holes (61) are distributed along the outer edge of the second fin plate (6).

2. The rigid pressure stabilizing device for an oil drilling pump according to claim 1, wherein: The axial direction of the isolation ring (4) is the x-axis, and the angle between the first fin (5) and the x-axis is 52 degrees.

3. The rigid voltage stabilizing device for an oil drilling pump according to claim 2, characterized in that: The radial direction of the isolation ring (4) is the y-axis, and the ratio of the projection of the first fin (5) on the x-axis to the projection on the y-axis is 0.

35.

4. A rigid voltage stabilizing device for an oil drilling pump according to claim 1, characterized in that: At least eight first fins (5) are provided.

5. The rigid voltage stabilizing device for an oil drilling pump according to claim 1, characterized in that: The axial direction of the isolation ring (4) is the x-axis, and the angle between the second fin (6) and the x-axis is 52 degrees.

6. The rigid voltage stabilizing device for an oil drilling pump according to claim 5, characterized in that: The radial direction of the isolation ring (4) is the y-axis, and the ratio of the projection of the second fin (6) on the x-axis to the projection on the y-axis is 0.

35.

7. The rigid pressure stabilizing device for an oil drilling pump according to claim 1, wherein: At least eight second fins (6) are provided.

8. The rigid voltage stabilizing device for an oil drilling pump according to claim 1, wherein: A baffle (7) is provided inside the housing (1). There is a gap between the baffle (7) and the housing (1), and the baffle (7) is connected to the housing (1) through a fixing rod (71). The baffle (7) can block the access hole (13).

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