A rigid pressure stabilizing device for oil drilling pumps

Abstract

The application discloses a rigid pressure stabilizing device for a petroleum drilling pump and belongs to the field of petroleum drilling equipment. The device comprises a main flow path formed by a connecting end one and a connecting end two connected to the side of the connecting end one. A gas bag buffer is fixed to the outer surface of the connecting end one, and the liquid inlet end of the gas bag buffer is communicated with the connecting end one. An inner cavity is formed in the connecting end two, and the inner cavity comprises a throat part formed in the middle part of the connecting end two. The gas bag buffer is matched with a throttling assembly to realize the pressure stabilizing function. When the pressure peak value comes, part of the fluid is rapidly compressed and absorbed by the gas bag of the gas bag buffer (energy is stored). Another part of the fluid passes through the throttling assembly, and the kinetic energy of the fluid is converted into heat energy through viscous friction and dissipated. When the pressure trough comes, the stored energy in the gas bag buffer is released, the compressed fluid is pushed back to the main flow path, the pressure of the main flow path is effectively supported and improved, and the trough value is compensated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil drilling equipment, more particularly, to a rigid pressure stabilizing device for oil drilling pump. BACKGROUND

[0002] The drilling pump is also called mud pump, which is essentially a high-power reciprocating piston pump, mainly responsible for continuously delivering drilling fluid (mud) to the bottom of the well in a high-pressure and high-flow manner during drilling. Drilling fluid not only helps to remove debris and waste, but also cools the drill bit to ensure the safety and efficient operation of drilling operations. Therefore, the performance of the drilling pump is crucial to the entire drilling project.

[0003] During the operation of the drilling pump, due to the movement mode of the crank and connecting rod mechanism, the instantaneous flow of the pump cylinder will change continuously with the movement of the drilling pump crank, which causes fluctuations in the discharge flow, also known as 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, which is the main cause of drilling pump failure. In order to solve this problem, the prior art (Chinese patent for invention with publication number CN120083677B) discloses a rigid pressure stabilizing device for oil drilling pump, which realizes the function of pressure stabilization by setting a turbulence structure to accelerate the flow and hinder the flow of fluid.

[0004] Although the pressure stabilizing device in the prior art can suppress high-frequency rapid fluctuations and flatten sharp pulsations, throttling is achieved by energy dissipation to stabilize pressure, which will cause pressure loss. Therefore, for low-frequency and large-amplitude pressure valleys, the current pressure stabilizing device cannot supplement energy and can only passively limit flow rate, and cannot supplement energy when the pressure is reduced. SUMMARY

[0005] In view of the problems existing in the prior art, the purpose of the present application is to provide a rigid pressure stabilizing device for oil drilling pump.

[0006] To solve the above problems, the present application adopts the following technical solutions.

[0007] A rigid pressure stabilizing device for oil drilling pump, comprising a main flow path composed of a connecting end one and a connecting end two connected to one side of the connecting end one;

[0008] A gas bag buffer is fixed to the outer surface of the connecting end one, and the inlet end of the gas bag buffer is in communication with the connecting end one;

[0009] An inner cavity is formed in the connecting end two, and the inner cavity includes a throat formed in the middle part of the connecting end two, an inlet end and a diffusion end formed on both sides of the connecting end two and in communication with the throat;

[0010] The inner cavity is provided with a throttling assembly, and the throttling assembly comprises a baffle fixed to the inner wall of the inlet end, a plurality of openings formed in the baffle, a spoiler located in the interior of the diffusion end, two extension rings fixed to the outer surface of the spoiler, a plurality of inclined slots formed in the interior of the two extension rings, and the outer wall of the two extension rings is fixed to the inner wall of the diffusion end.

[0011] Further, the air bag buffer is used to absorb part of the fluid in the main flow path, the throttling assembly converts the kinetic energy of another part of the fluid in the main flow path into heat energy through viscous friction; when the fluid pressure in the main flow path appears a trough, the energy stored in the air bag buffer starts to release, pushing the compressed fluid back to the main flow path, compensating for the trough of the main flow path.

[0012] Further, the inlet end is formed in one end connected to the first connecting end, and the connection between the inlet end and the throat is provided with an inclined surface one.

[0013] Further, the plurality of openings are provided with chamfers on the side of the first connecting end.

[0014] Further, the interior of the inlet end is further connected with an opening adjusting part, and the opening adjusting part comprises a seat located in the interior of the inlet end, an inclined surface two formed on one side of the seat, two support parts one symmetrically fixed to the outer surface of the seat, a plurality of guide parts movably inserted into the interior of the seat, a conical seat fixed to one end of the plurality of guide parts, an extension end integrally formed on one side of the seat, a hydraulic rod fixed to the interior of the extension end and the conical seat, and the extension end of the hydraulic rod extends from the seat and is fixed to one side of the conical seat, and the other end of the two support parts one is fixed to the inner wall of the inlet end.

[0015] Further, the outer surface of the extension end is symmetrically fixed with two support parts two, and the two ends of the two support parts two are fixed to the inner wall of the inlet end, and the interior of one of the two support parts two is fixed with a pipeline, one end of the pipeline is connected with the hydraulic rod, and the other end of the pipeline is connected with an interface formed on the outer surface of the second connecting end.

[0016] Further, the interior of the seat is fixed with a dynamic sealing part sleeved on the extension end of the hydraulic rod and dynamically sealing the extension end of the hydraulic rod.

[0017] Further, the interior of the diffusion end is further provided with a cyclone part, and the cyclone part comprises a spiral guide vane located between the two extension rings, the outer edge wall of the spiral guide vane is fixed to the inner wall of the diffusion end, and the inner edge wall of the spiral guide vane is fixed to the outer surface of the spoiler.

[0018] Further, the outer surface of the spoiler is provided with a plurality of shunt grooves, and one side of the spoiler is provided with a drainage groove in communication with the plurality of shunt grooves, and the plurality of shunt grooves are located between the two extension rings.

[0019] Further, one side of the spoiler is provided with an inclined surface three, and the outer surface of the inclined surface three is integrally formed with a spiral flange one; the inclined surface one in the diffusion end is integrally formed with a spiral flange two.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] (1) The scheme adopts the cooperation of the air bag buffer and the throttling assembly to realize the pressure stabilizing function. When the pressure peak value comes, part of the fluid is rapidly compressed and absorbed by the air bag of the air bag buffer (stores energy); another part of the fluid passes through the throttling assembly, and the kinetic energy of the fluid is converted into heat energy through viscous friction and dissipated; the two work together, and the peak suppression effect is better than that of a single component; and when the pressure trough comes, the stored energy in the air bag buffer is released, and the compressed fluid is pushed back to the main flow path, effectively supporting and improving the pressure of the main flow path, thereby compensating the trough value; the design has high reliability, and even if one fails, the other can still provide certain protection.

[0022] (2) The scheme is provided with an opening degree adjusting part in the inner part of the inlet end. When the pressure is stable, the control cone seat is moved to the maximum opening degree or a very small basic opening degree, at this time, the flow resistance is reduced to the lowest, and the average pressure difference and energy consumption are also reduced to the lowest; when the pressure fluctuates, the control cone seat moves, the gap between the inclined surface on the outer surface of the control cone seat and the inclined surface one in the inner part of the inlet end becomes smaller, the flow area becomes smaller, the flow rate increases, and the pressure decreases; a transient and corresponding reverse pressure fluctuation is generated to cancel out; the opening degree is dynamically adjusted to throttle when necessary, thereby reducing the average pressure difference and energy consumption; and the opening degree can be adjusted according to different flow conditions, thereby achieving good pressure stabilizing effect.

[0023] (3) The scheme is provided with inclined slots in the extension rings. When the fluid is discharged from the throat and passes through the extension rings, the inclined slots cut and scatter the fluid into vortices, and the spiral guide vanes between the two extension rings can guide the fluid preliminarily cut by the first extension ring and having tangential velocity into a regular spiral (rotational flow) flow. The rotational flow has better stability, can inhibit the further development of axial pulsation, and the spiral flow can promote the radial mixing of the fluid, so that the flow field is more uniform in the cross section, which also helps to eliminate local instability factors and suppress the pressure fluctuation of the downstream; at the same time, the particles in the fluid are "lifted up" in the rotational flow and are not easy to deposit and block in the diffusion end. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the application;

[0025] Figure 2 It is a sectional view of the connecting end two of the application;

[0026] Figure 3 Schematic view of the baffle and opening structure of the present application;

[0027] Figure 4 Schematic view of the spoiler and oblique slot structure of the present application;

[0028] Figure 5 Schematic view of the opening adjusting part structure of the present application;

[0029] Figure 6 Schematic view of the shunt groove and helical guide vane structure of the present application;

[0030] Figure 7 Schematic view of the liquid discharge groove structure of the present application.

[0031] Explanation of the reference numerals in the drawings:

[0032] 1, connecting end one; 2, connecting end two; 21, inner cavity; 211, inlet end; 212, throat; 213, diffusion end; 214, inclined surface one; 22, baffle; 23, opening; 24, spoiler; 25, extension ring; 26, oblique slot; 3, air bag buffer; 4, opening adjusting part; 41, seat body; 411, inclined surface two; 42, support part one; 43, extension end; 44, support part two; 45, conical seat; 46, guide part; 47, hydraulic rod; 48, pipeline; 49, dynamic sealing part; 5, rotational flow part; 51, helical guide vane; 52, shunt groove; 53, liquid discharge groove; 6, inclined surface three; 7, helical flange one; 8, helical flange two. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0034] Please refer to Figures 1 to 7 A rigid pressure stabilizing device for an oil drilling pump, comprising a main flow path composed of a connecting end one 1 and a connecting end two 2 connected to one side of the connecting end one 1;

[0035] The air bag buffer 3 is fixedly connected to the outer surface of the connecting end one 1, and the liquid inlet end of the air bag buffer 3 is in communication with the connecting end one 1;

[0036] The connecting end two 2 is internally provided with an inner cavity 21, and the inner cavity 21 includes a throat 212 provided in the middle part of the connecting end two 2, and an inlet end 211 and a diffusion end 213 provided on both sides of the connecting end two 2 and in communication with the throat 212;

[0037] The inner cavity 21 is provided with a throttling assembly, which comprises a baffle 22 fixed to the inner wall of the inlet end 211, a plurality of openings 23 formed in the baffle 22, a spoiler 24 located in the inner part of the diffusion end 213, two extension rings 25 fixed to the outer surface of the spoiler 24, and a plurality of oblique slots 26 formed in the inner part of the two extension rings 25, and the outer wall of the two extension rings 25 is fixed to the inner wall of the diffusion end 213.

[0038] The air bag buffer 3 is used to absorb part of the fluid in the main flow path, and the throttling assembly converts the kinetic energy of another part of the fluid in the main flow path into heat energy through viscous friction; when the fluid pressure in the main flow path reaches a trough, the energy stored in the air bag buffer 3 starts to release, pushing the compressed fluid back to the main flow path to compensate for the trough value.

[0039] The inlet end 211 is formed in the inner part of one end connected to the connection end two 2 and the connection end one 1, and the connection part between the inlet end 211 and the diffusion end 213 and the throat 212 is provided with an inclined surface one 214.

[0040] The plurality of openings 23 are provided with chamfers on the side facing the connection end one 1.

[0041] According to the above technical scheme, one end of the connection end one 1 is connected to the discharge pipeline of the drilling pump, and the fluid discharged from the discharge pipeline of the drilling pump enters the main flow path formed by the connection end one 1 and the connection end two 2; when the pressure peak of the fluid comes, part of the fluid quickly enters the air bag buffer 3 and is compressed and absorbed (energy is stored) by the air bag of the air bag buffer 3; another part of the fluid enters the inlet end 211 and passes through the throat 212 to enter the diffusion end 213, and the throttling treatment of the fluid can be realized through the baffle 22 in the inner part of the inlet end 211 and the spoiler 24 and the extension ring 25 in the diffusion end 213, the fluid is divided when passing through the plurality of openings 23 in the baffle 22, and the fluid is blocked by the extension ring 25 and is divided through the plurality of oblique slots 26; through the throttling assembly, the kinetic energy of the fluid is converted into heat energy through viscous friction and dissipated, thereby realizing the pressure stabilizing effect; the two work together, and the peak suppression effect is better than that of a single element; when the pressure trough comes, the energy stored in the air bag buffer 3 starts to release, pushing the compressed fluid back to the main flow path, effectively supporting and improving the pressure of the main flow path, thereby compensating for the trough value; the design has high reliability, and even if one of them fails, the other can still provide certain protection.

[0042] As Figure 2 and Figure 5As shown, the inside of the inlet end 211 is also connected with an opening degree adjusting part 4, and the opening degree adjusting part 4 comprises a seat body 41 inside the inlet end 211, an inclined surface two 411 opened on one side of the seat body 41, two support parts one 42 symmetrically fixed on the outer surface of the seat body 41, a plurality of guide parts 46 movably inserted into the inside of the seat body 41, a conical seat 45 fixed on one end of the plurality of guide parts 46, an extension end 43 integrally formed on one side of the seat body 41, a hydraulic rod 47 fixed in the inside of the extension end 43 and the conical seat 45, and the telescopic end of the hydraulic rod 47 extends from the seat body 41 and is fixed on one side of the conical seat 45. The other ends of the two support parts one 42 are fixed on the inner wall of the inlet end 211.

[0043] The outer surface of the extension end 43 is symmetrically fixed with two support parts two 44, and the two ends of the two support parts two 44 are fixed on the inner wall of the inlet end 211. The inside of one of the support parts two 44 is fixed with a pipeline 48, one end of which is connected with the hydraulic rod 47, and the other end of the pipeline 48 is connected with an interface opened on the outer surface of the connecting end two 2.

[0044] A plurality of dynamic sealing parts 49 are fixed in the inside of the seat body 41, which are sleeved on the outside of the telescopic end of the hydraulic rod 47 and dynamically seal the telescopic end of the hydraulic rod 47. The shaft face dynamic sealing technology belongs to mature prior art, and will not be described here. In this application, multiple dynamic sealing is provided to improve the effect of dynamic sealing.

[0045] By adopting the above technical scheme, when the fluid enters the throat part 212 from the inlet end 211, it needs to pass between the inclined surface one 214 and the conical seat 45. The conical seat 45 is designed to adjust the opening degree of the fluid. When the pressure is stable, the hydraulic rod 47 is controlled to drive the conical seat 45 to move to the maximum opening degree or a very small basic opening degree, at which time the flow resistance is the lowest, and the average pressure difference and energy consumption are also the lowest. When the pressure pulsates, the conical seat 45 is controlled to move, the gap between the inclined surface of the outer surface of the conical seat 45 and the inclined surface one 214 inside the inlet end 211 becomes smaller, the flow area becomes smaller, the flow rate increases, and the pressure decreases. A transient and corresponding reverse pressure fluctuation is generated to offset the pressure pulsation. The opening degree is dynamically adjusted to throttle only when necessary, reducing the average pressure difference and energy consumption. It can be adjusted according to different flow conditions to achieve good pressure stabilizing effect. It should be noted that sensors are installed on the inner walls of the inlet end 211, the throat part 212 and the diffusion end 213 to monitor the pressure value of the fluid in the inner cavity 21.

[0046] As shown in the drawings, Figure 2 , Figure 6As shown, the inside of the diffusion end 213 is also provided with a spiral flow part 5, and the spiral flow part 5 includes helical vanes 51 between the two extension rings 25, the outer edge wall of the helical vanes 51 is fixedly connected with the inner wall of the diffusion end 213, and the inner edge wall of the helical vanes 51 is fixedly connected with the outer surface of the spoiler part 24.

[0047] By adopting the above technical scheme, when the fluid is discharged from the throat 212 and passes through the extension ring 25, the oblique slot 26 cuts and scatters the fluid into a vortex, and the helical vanes 51 between the two extension rings 25 can guide the fluid preliminarily cut by the first extension ring 25 and having a tangential velocity to flow in a regular spiral (spiral flow) flow, the spiral flow has better stability, can inhibit the re-development of axial pulsation, and the spiral flow can promote the radial mixing of the fluid, so that the flow field is more uniform in the cross section, which also helps to eliminate local instability factors and helps to suppress the pressure fluctuation downstream; at the same time, the particles in the fluid are "lifted up" in the spiral flow and are not easy to deposit and block in the diffusion end 213; compared with a simple orifice scheme for generating the same pressure drop, the present application can reduce irreversible pressure loss by controlling boundary layer separation and orderly energy dissipation; while achieving similar pressure stabilization effect, the energy consumption and heat generation of the pressure stabilization system are lower.

[0048] As shown in Figure 6 and Figure 7 The outer surface of the spoiler part 24 is provided with a plurality of shunt grooves 52, and one side of the spoiler part 24 is provided with a liquid discharge groove 53 in communication with the plurality of shunt grooves 52, and the plurality of shunt grooves 52 are located between the two extension rings 25.

[0049] By adopting the above technical scheme, when the fluid passes through the oblique slot 26 on the first extension ring 25 and reaches between the two extension rings 25, the fluid is guided to flow by the helical vanes 51, and in this process, part of the fluid is "sucked" into the shunt groove 52, and a part of the fluid is guided away from the spiral flow field area, and the shunted fluid is discharged from the liquid discharge groove 53 in the spoiler part 24 and recombined with the fluid discharged through the oblique slot 26 on the second extension ring 25; the local fluid with high energy is guided away, the pressure peak of the main channel is reduced, and the local pressure peak and turbulence intensity between the rings can be reduced; at the same time, when the mud contains sand, large particles are easy to accumulate between the rings. The shunt groove 52 can carry part of the particles away and discharge them from the liquid discharge groove 53 in the spoiler part 24, which forms a self-cleaning flow channel, and improves the operation reliability of the device in harsh media.

[0050] As shown in Figure 2 and Figure 6As shown, the spoiler 24 is provided with a slope three 6 on one side, and the outer surface of the slope three 6 is integrally formed with a helical flange one 7, and the slope one 214 in the diffusion end 213 is integrally formed with a helical flange two 8.

[0051] By adopting the above technical scheme, when the fluid is discharged from the throat 212 and enters the diffusion end 213, the helical flange two 8 and the helical flange one 7 can guide the fluid to change from purely axial flow to axial-spiral composite flow before the fluid begins to decelerate due to diffusion and faces the risk of separation, creating a preliminarily organized rotational flow field, effectively weakening the axial pulsation peak, effectively slowing down the transient impact, and under the rotational flow, the local backflow and radial redistribution are smoother, which helps to uniformize the pressure at the valley value.

[0052] The use method is as follows: one end of the connecting end one 1 is connected with the drilling pump discharge pipeline, the fluid discharged from the drilling pump discharge pipeline enters the main flow path formed by the connecting end one 1 and the connecting end two 2; when the pressure peak in the fluid comes, part of the fluid rapidly enters the air bag buffer 3 and is absorbed (energy is stored) by the air bag of the air bag buffer 3; the other part of the fluid enters the inlet end 211 and enters the diffusion end 213 through the throat 212, the throttling treatment of the fluid can be realized through the baffle 22 inside the inlet end 211 and the spoiler 24 and the extension ring 25 inside the diffusion end 213, the fluid is divided when passing through the multiple openings 23 in the baffle 22, the fluid is blocked by the extension ring 25 and is divided through the multiple oblique slots 26; through the throttling assembly, the kinetic energy of the fluid is converted into heat energy through viscous friction and is dissipated, so that the pressure stabilizing effect is realized; the two work cooperatively, and the peak suppression effect is better than that of a single element; when the pressure trough comes, the energy stored in the air bag buffer 3 is released, the compressed fluid in the air bag buffer 3 is pushed back to the main flow path, the pressure in the main flow path is effectively supported and increased, so that the trough value is compensated; when the fluid enters the throat 212 from the inlet end 211, the fluid needs to pass between the inclined surface one 214 and the conical seat 45, the conical seat 45 is designed to realize the adjustment of the fluid passing opening; when the pressure is stable, the control hydraulic rod 47 works to drive the conical seat 45 to move to the maximum opening or a very small basic opening, at this time, the flow resistance is the lowest, and the average pressure difference and the energy consumption are also the lowest; when the pressure appears pulsation, the conical seat 45 is controlled to move, the gap between the inclined surface on the outer surface of the conical seat 45 and the inclined surface one 214 inside the inlet end 211 becomes smaller, the flow area becomes smaller, the flow rate increases, and the pressure decreases; a transient and corresponding reverse pressure fluctuation is generated to offset the pressure pulsation, the pressure stabilizing effect is good according to the adjustment of different flow conditions; when the fluid is discharged from the throat 212 and passes through the extension ring 25, the oblique slots 26 cut and scatter the fluid into vortexes, and the spiral guide vane 51 between the two extension rings 25 can organize the fluid preliminarily cut by the first extension ring 25 and having tangential velocity into a regular spiral (rotational flow) flow, the rotational flow has better stability, can inhibit the re-development of axial pulsation, and the spiral flow can promote the radial mixing of the fluid, so that the flow field is more uniform in the cross section; meanwhile, when the fluid passes through the oblique slots 26 on the first extension ring 25 and reaches between the two extension rings 25, the fluid is guided to flow by the spiral guide vane 51, in the process, part of the fluid is "sucked" into the shunt groove 52 when passing through the spiral flow field, a part of the fluid is led away from the spiral flow field area, the divided fluid is discharged from the liquid discharge groove 53 inside the spoiler 24 and recombines with the fluid discharged through the oblique slots 26 on the second extension ring 25; the local fluid with high energy is led away, and the pressure peak of the main channel is reduced.

[0053] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art, according to the technical solution of the present application and the improved concept thereof, makes equivalent replacement or change within the technical range disclosed by the present application, and should be covered within the protection scope of the present application.

Claims

1. A rigid pressure stabilizing device for an oil drilling pump, comprising a main flow path consisting of a first connecting end (1) and a second connecting end (2) connected to one side of the first connecting end (1), characterized in that: An airbag-type buffer (3) is fixedly attached to the outer surface of the connecting end (1), and the liquid inlet end of the airbag-type buffer (3) is connected to the connecting end (1). The connecting end two (2) has an inner cavity (21) inside, and the inner cavity (21) includes a throat (212) in the middle of the connecting end two (2), an inlet end (211) on both sides of the connecting end two (2) and connected to the throat (212), and a diffuser end (213). The inner cavity (21) is provided with a throttling component, which includes a baffle (22) fixed to the inner wall of the inlet end (211), a plurality of openings (23) opened inside the baffle (22), a turbulence part (24) located inside the diffuser end (213), two extension rings (25) fixed to the outer surface of the turbulence part (24), and a plurality of oblique slots (26) opened inside the two extension rings (25), and the outer ring wall of the two extension rings (25) is fixed to the inner wall of the diffuser end (213).

2. The rigid pressure stabilizing device for an oil drilling pump according to claim 1, characterized in that: The airbag-type buffer (3) is used to absorb part of the fluid in the main flow path. The throttling component converts the kinetic energy of another part of the fluid in the main flow path into heat energy through viscous friction and dissipates it. When the fluid pressure in the main flow path reaches a trough, the energy stored in the airbag-type buffer (3) begins to be released, pushing the compressed fluid back into the main flow path to compensate for the trough value of the main flow path.

3. The rigid pressure stabilizing device for an oil drilling pump according to claim 2, characterized in that: The inlet end (211) is located inside the end of the connecting end (2) that is connected to the connecting end (1), and the inlet end (211) and the diffuser end (213) are both provided with a slope (214) at the connection between the throat (212).

4. The rigid pressure stabilizing device for an oil drilling pump according to claim 3, characterized in that: Each of the multiple openings (23) has a chamfer on the side facing the connection end (1).

5. A rigid pressure stabilizing device for an oil drilling pump according to claim 4, characterized in that: The entrance end (211) is also connected to an opening adjustment part (4), and the opening adjustment part (4) includes a seat (41) located inside the entrance end (211), a second inclined surface (411) opened on one side of the seat (41), two support parts (42) symmetrically fixed to the outer surface of the seat (41), a plurality of guide parts (46) movably inserted into the interior of the seat (41), a conical seat (45) fixed to one end of the plurality of guide parts (46), an extension end (43) integrally formed on one side of the seat (41), and a hydraulic rod (47) fixed inside the extension end (43) and the conical seat (45). The telescopic end of the hydraulic rod (47) extends out from the seat (41) and is fixed to one side of the conical seat (45). The other ends of the two support parts (42) are fixed to the inner wall of the entrance end (211).

6. The rigid pressure stabilizing device for an oil drilling pump according to claim 5, characterized in that: Two support parts (44) are symmetrically fixed to the outer surface of the extension end (43), and both ends of the two support parts (44) are fixed to the inner wall of the inlet end (211). One of the support parts (44) has a pipe (48) fixed inside. One end of the pipe (48) is connected to the hydraulic rod (47), and the other end of the pipe (48) is connected to the interface opened on the outer surface of the connection end (2).

7. A rigid pressure stabilizing device for an oil drilling pump according to claim 6, characterized in that: The seat (41) has a dynamic sealing part (49) that is sleeved on the outside of the telescopic end of the hydraulic rod (47) and provides dynamic sealing to the telescopic end of the hydraulic rod (47).

8. A rigid pressure stabilizing device for an oil drilling pump according to claim 7, characterized in that: The diffuser end (213) is further provided with a swirling section (5), and the swirling section (5) includes a spiral guide plate (51) located between two extension rings (25). The outer wall of the spiral guide plate (51) is fixedly connected to the inner wall of the diffuser end (213), and the inner wall of the spiral guide plate (51) is fixedly connected to the outer surface of the turbulence section (24).

9. A rigid pressure stabilizing device for an oil drilling pump according to claim 8, characterized in that: The outer surface of the turbulence section (24) is provided with a plurality of diversion grooves (52), and a drain groove (53) connected to the plurality of diversion grooves (52) is provided on one side of the turbulence section (24), and the plurality of diversion grooves (52) are located between two extension rings (25).

10. A rigid pressure stabilizing device for an oil drilling pump according to claim 9, characterized in that: The turbulence section (24) has a three-sided slope (6) on one side, and a spiral flange (7) is integrally formed on the outer surface of the three-sided slope (6), and a spiral flange (8) is integrally formed on the one-sided slope (214) located inside the diffuser end (213).

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