A bypass hole type power sub assembly and hydraulic oscillator

Abstract

This application discloses a bypass-hole-type power subassembly and hydraulic oscillator, relating to the field of oil drilling technology. The power subassembly comprises a cap-shaped upper static sleeve and a bypass rotor shaft, the cap-shaped upper static sleeve separating the top opening of the bypass rotor shaft from the high-pressure water flow; and a bypass flow channel disposed on the bypass rotor shaft, the bypass flow channel connecting the upper portion of the bypass rotor shaft with the bottom end surface of the bypass rotor shaft. The power subassembly and hydraulic oscillator of this application eliminate or minimize axial force generated by the rotor shaft, thereby reducing friction between the lower end of the rotor shaft and the static valve plate.

Description

Technical Field

[0001] The present application relates to the technical field of oil drilling and production, and in particular to a bypass hole type power nipple assembly and a hydraulic oscillator. Background Art

[0002] With the development of oil exploration technology, in order to improve the recovery rate, increase the output of oil and gas fields, and adapt to the difficulty of mining horizontal wells, lateral wells, extended reach wells and multi-branch horizontal wells with complex wellbore structures, such wells have complex wellbore trajectories and large friction between the drill string and the wellbore rock, which causes the drill string to experience support pressure and drill sticking during drilling, resulting in low drilling efficiency and a long development cycle. Especially during sliding drilling, the drill string and the wellbore rock are in a relatively static state, and the static friction is much greater than the dynamic friction, which increases the resistance to lowering the drill string, reducing the drilling pressure applied to the drill bit through the drill string, resulting in a lower mechanical drilling speed, a longer drilling cycle, and an increase in drilling costs, which seriously restricts the development of horizontal wells, lateral wells, and extended reach wells.

[0003] In order to solve the many problems caused by the excessive friction between the drill string and the well wall, a lot of research has been conducted on drill string vibration drag reduction technology at home and abroad, and a turbine hydraulic oscillator has been developed. The hydraulic oscillator consists of a power subassembly and an oscillation subassembly. The oscillation subassembly is installed on the top of the power subassembly. The power subassembly is used to generate a pressure difference, and the oscillation subassembly is used to convert the pressure difference into vibration. The power subassembly of the hydraulic oscillator is as follows: Figures 1 to 6 As shown, high-pressure liquid enters the hydraulic oscillator inlet, flows through the open upper static sleeve 3, and flows into the turbine assembly (turbine stator 6 and turbine rotor 5). The turbine assembly drives the original rotor shaft 7 to rotate. The lower end of the original rotor shaft 7 has an eccentric hole machined into it, which contacts the single-hole static valve plate 9 with the eccentric hole. The single-hole static valve plate 9 withstands the axial force generated by the original rotor shaft 7 and the turbine assembly. As the original rotor shaft 7 rotates, the eccentric hole at the lower end of the original rotor shaft 7 and the eccentric hole in the single-hole static valve plate 9 form a channel with a changing flow area, thereby generating pressure fluctuations.

[0004] However, since the pressure at the upper end of the original rotor shaft 7 is much higher than the pressure at the lower end, the original rotor shaft 7 will generate a large downward axial force, and the friction between the lower end of the original rotor shaft 7 and the single-hole static valve plate 9 will also be very large. The large friction will not only cause the original rotor shaft 7 to rotate slower and slower or even unable to rotate, but will also greatly shorten the service life of the single-hole static valve plate 9. Summary of the Invention

[0005] In response to the defects in the prior art, the purpose of this application is to provide a bypass hole type power short section assembly and hydraulic oscillator, so that the rotor shaft does not generate axial force or generates very small axial force, thereby reducing the friction between the lower end of the rotor shaft and the static valve plate.

[0006] In order to achieve the above purpose, the technical solution adopted is: a bypass hole type power short section assembly, the power short section assembly includes a hat-shaped upper static sleeve and a bypass rotor shaft, the hat-shaped upper static sleeve separates the top opening of the bypass rotor shaft and the high-pressure water flow: the bypass rotor shaft is provided with a bypass flow channel, and the bypass flow channel connects the upper part of the bypass rotor shaft and the bottom end surface of the bypass rotor shaft.

[0007] Based on the above technical solution, the bypass rotor shaft includes a separated hollow upper part and a hollow lower part, the top opening of the bypass flow channel is connected to the hollow upper part, and the bottom opening is opened on the circumferential surface of the bypass rotor shaft, and the bottom opening is adjacent to the bottom end surface of the bypass rotor shaft; the cap-shaped upper static sleeve includes a cap extending upward, and the cap separates the hollow upper opening from the high-pressure water flow.

[0008] Based on the above technical solution, the bypass rotor shaft further includes a transverse partition section, which separates the hollow upper part and the hollow lower part. The bypass flow channel is arranged on the side wall of the hollow lower part, and a circular hole is opened on the side wall on the opposite side of the bypass flow channel; the top opening of the bypass flow channel is arranged on the transverse partition section.

[0009] Based on the above technical solution, the power short section assembly further includes a porous static valve plate, and a plurality of auxiliary connecting holes are arranged around its eccentric hole; the auxiliary connecting holes are adjacent to the bottom end surface of the bypass rotor shaft and connected to the bottom end opening of the bypass flow channel.

[0010] On the basis of the above technical solution, the power short section assembly further includes a lower moving sleeve and a partition lower static sleeve. The lower moving sleeve is fixedly sleeved in the hollow lower part, and the partition lower static sleeve is sleeved on the lower moving sleeve; the lower moving sleeve and the partition lower static sleeve form a sliding bearing that separates the upper high-pressure area and the lower low-pressure area.

[0011] Based on the above technical solution, an annular channel is formed between the partition lower static sleeve and the porous static valve plate, the bottom end opening of the bypass flow channel is connected to the annular channel, and the annular channel is connected to all the auxiliary communication holes.

[0012] The present application also discloses a hydraulic oscillator, comprising:

[0013] The above-mentioned power sub assembly;

[0014] An oscillating nipple assembly is installed above the upper joint of the power nipple assembly; the oscillating nipple assembly converts the pressure difference generated by the continuously changing matching area between the eccentric hole at the bottom end of the bypass rotor shaft of the power nipple assembly and the eccentric hole of the static valve plate into vibration.

[0015] Based on the above technical solution, the bypass rotor shaft includes a hollow upper portion and a hollow lower portion separated from each other, the top opening of the bypass flow channel is connected to the hollow upper portion, and the bottom opening is opened on the circumferential surface of the bypass rotor shaft, and the bottom opening is adjacent to the bottom end surface of the bypass rotor shaft;

[0016] The cap-shaped upper static sleeve comprises a cap cover extending upwards, and the cap cover separates the hollow upper opening from the high-pressure water flow.

[0017] Based on the above technical solution, the bypass rotor shaft further includes a transverse partition section, which separates the hollow upper part and the hollow lower part. A bypass flow channel is provided on the side wall of the hollow lower part, and a circular hole is provided on the side wall on the opposite side of the bypass flow channel; the top opening of the bypass flow channel is provided on the transverse partition section.

[0018] On the basis of the above technical solution, the power short section assembly further includes a porous static valve plate, and a plurality of auxiliary connecting holes are arranged around its eccentric hole; the auxiliary connecting holes are adjacent to the bottom end surface of the bypass rotor shaft and connected to the bottom end opening of the bypass flow channel; the power short section assembly also includes a lower moving sleeve and a partition lower static sleeve, the lower moving sleeve is fixedly sleeved in the hollow lower part, and the partition lower static sleeve is sleeved on the lower moving sleeve; the lower moving sleeve and the partition lower static sleeve constitute a sliding bearing that separates the upper high-pressure area and the lower low-pressure area.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] The bypass hole type power short section assembly and hydraulic oscillator of the present application have a simple power short section assembly structure. Compared with the known structure, only a small number of parts have been improved and optimized. In the improved structure, the cap of the cap-shaped upper static sleeve separates the hollow upper part of the bypass rotor shaft from the high-pressure water flow, so that the interior of the hollow upper part is still a low-pressure area; and the bypass flow channel connects the interior of the hollow upper part, the bottom end face of the bypass rotor shaft and the auxiliary connecting hole, so that these three areas are all low-pressure areas, which greatly reduces the downward axial force of the bypass rotor shaft, so that the bypass rotor shaft does not generate axial force or generates very small axial force, further reduces the friction between the lower end face of the bypass rotor shaft and the porous static valve plate, and increases the service life of the porous static valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a general structural diagram of a currently known pressure fluctuation device;

[0023] Figure 2 for Figure 1 Schematic diagram of the open upper static sleeve in;

[0024] Figure 3 for Figure 2 A top view of

[0025] Figure 4 for Figure 1 Schematic diagram of a single-hole static valve plate;

[0026] Figure 5 for Figure 4 A top view of

[0027] Figure 6 for Figure 1 Schematic diagram of the original rotor shaft in;

[0028] Figure 7 This is a diagram showing the overall structure of the pressure fluctuation device provided in an embodiment of the present application;

[0029] Figure 8 for Figure 7 Schematic diagram of the cap-shaped upper static sleeve in ;

[0030] Figure 9 for Figure 8 A top view of

[0031] Figure 10 for Figure 7 Schematic diagram of the static sleeve under the partition;

[0032] Figure 11 for Figure 7 Schematic diagram of the porous static valve plate in;

[0033] Figure 12 for Figure 11 A top view of

[0034] Figure 13 for Figure 7 Schematic diagram of the bypass rotor shaft in FIG;

[0035] Figure numerals: 1. upper joint; 2. pressure cap; 3. open upper static sleeve; 4. upper moving sleeve; 5. turbine rotor; 6. turbine stator; 7. original rotor shaft; 8. spacer; 9. single-hole static valve plate; 10. housing; 17. lower moving sleeve; 18. connecting lower static sleeve; 12. cap-shaped upper static sleeve; 121. cap cover; 13. bypass rotor shaft; 131. bypass flow channel; 132. hollow upper part; 133. hollow lower part; 134. transverse partition; 14. partition lower static sleeve; 15. porous static valve plate; 19. water inlet; 20. rotor shaft port area; 21. water outlet; 151. auxiliary connecting hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0037] like Figures 7 to 13 As shown, the present application discloses an embodiment of a bypass hole type power nipple assembly, which includes a cap-shaped upper static sleeve 12 and a bypass rotor shaft 13. The cap-shaped upper static sleeve 12 separates the top opening of the bypass rotor shaft 13 from the high-pressure water flow, so that the upper part of the bypass rotor shaft 13 maintains a low-pressure state: the bypass rotor shaft 13 is provided with a bypass flow channel 131, and the bypass flow channel 131 connects the upper part of the bypass rotor shaft 13 and the bottom end surface of the bypass rotor shaft 13, that is, the upper part of the bypass flow channel 131 and the bottom end surface of the bypass rotor shaft 13 are connected through the bypass flow channel 131, and both are in the low-pressure area, which greatly reduces the downward axial force of the bypass rotor shaft 13, so that the bypass rotor shaft 13 does not generate an axial force or generates a very small axial force.

[0038] In one embodiment, the bypass rotor shaft 13 includes a hollow upper portion 132 and a hollow lower portion 133 separated from each other. The top opening of the bypass flow channel 131 is connected to the hollow upper portion 132, and the bottom opening thereof is opened on the circumferential surface of the hollow lower portion 133, that is, opened from the bottom opening to the side wall of the hollow lower portion 133, and the bottom opening of the bypass flow channel 131 is adjacent to the bottom end surface of the bypass rotor shaft 13.

[0039] The cap-shaped upper static sleeve 12 includes an upwardly extending cap 121. The cap 121 is added to the original open upper static sleeve 3. The cap 121 isolates the opening of the hollow upper portion 132 from the high-pressure water flow, so that the interior of the hollow upper portion 132 remains a low-pressure area.

[0040] The power sub assembly of the present application has an ingenious design of the cap 121, which changes the hollow upper part 132 that should originally belong to the high-pressure area into a low-pressure area, and makes the pressure on both sides of the hollow lower part 133 equal, reducing the downward axial force of the bypass rotor shaft 13.

[0041] In one embodiment, based on the above technical solution, the bypass rotor shaft 13 further includes a transverse partition 134, which separates the hollow upper portion 132 from the hollow lower portion 133. The overall structure of the bypass rotor shaft 13 is basically the same as that of the conventional original rotor shaft. The difference is that the sidewalls of the hollow lower portion 133 of the original rotor shaft have circular holes on both sides. In contrast, the sidewalls of the hollow lower portion 133 of the bypass rotor shaft 13 of the present application are provided with a bypass flow channel 131, and the sidewalls on the opposite side of the bypass flow channel 131 have circular holes. The top opening of the bypass flow channel 131 is provided at the transverse partition 134, and its bottom opening is adjacent to the bottom end surface of the bypass rotor shaft 13.

[0042] Specifically, if Figure 1 The hollow lower portion 133 of the original rotor shaft 7 has circular holes on both sides. Figure 7 A circular hole is formed on one side of the hollow lower portion 133 of the bypass rotor shaft 13 , and a side wall is thickened on the other side and provided with a bypass flow channel 131 .

[0043] The power sub assembly further includes a multi-porous static valve disc 15. A plurality of auxiliary communication holes 151 are disposed around the eccentric hole of the multi-porous static valve disc 15. These auxiliary communication holes 151 are adjacent to the circumferential surface of the bypass rotor shaft 13 and connect to the bottom opening and the water outlet of the bypass flow channel 131. The bypass flow channel 131 connects the hollow upper portion 132 with the auxiliary communication holes 151.

[0044] The power short section assembly of the present application has a simple structure. Compared with the known structure, only a small number of parts have been improved and optimized, mainly improving the open upper static sleeve 3 into a cap-shaped upper static sleeve 12, improving the original rotor shaft 7 into a bypass rotor shaft 13, and improving the single-hole static valve plate 9 into a porous static valve plate 15; in the improved structure, the cap 121 of the cap-shaped upper static sleeve 12 separates the hollow upper part 132 of the bypass rotor shaft 13 from the high-pressure water flow, so that the interior of the hollow upper part 132 is still a low-pressure area; and the bypass flow channel 131 connects the interior of the hollow upper part 132, the bottom end face of the bypass rotor shaft 13 and the auxiliary connecting hole 151, so that the pressures at these three positions are equal and all belong to the low-pressure area, which greatly reduces the downward axial force of the bypass rotor shaft 13, so that the bypass rotor shaft 13 does not generate axial force or generates very small axial force, further reduces the friction between the lower end face of the bypass rotor shaft 13 and the porous static valve plate 15, and increases the service life of the porous static valve plate 15.

[0045] Specifically, the rotor shaft port region 20 and the water outlet 21 both belong to the low-pressure area.

[0046] Building on the above technical solution, the power subassembly further includes a lower rotor sleeve 17 and a partition lower static sleeve 14. The lower rotor sleeve 17 is fixedly mounted within the hollow lower portion 133, and the partition lower static sleeve 14 is mounted within the lower rotor sleeve 17. The lower rotor sleeve 17 and the partition lower static sleeve 14 form a sliding bearing that separates the upper high-pressure zone from the lower low-pressure zone. Specifically, when the bypass rotor shaft 13 rotates, the lower rotor sleeve 17 is fixed relative to the bypass rotor shaft 13 and rotates with it, while the partition lower static sleeve 14 is fixed relative to the housing 10 and remains stationary. The partition lower static sleeve 14 blocks all bypass holes relative to the existing connecting lower static sleeve 18.

[0047] Similarly, the upper movable sleeve 4 and the hat-shaped upper static sleeve 12 have the same matching relationship. The upper movable sleeve 4 and the hat-shaped upper static sleeve 12 form a sliding bearing with a very small gap between the two. The upper movable sleeve 4 is fixed to the bypass rotor shaft 13, and the hat-shaped upper static sleeve 12 is fixed to the housing 10.

[0048] Furthermore, an annular channel is formed between the lower static sleeve 14 and the porous static valve plate 15. The bottom end opening of the bypass channel 131 is connected to the annular channel, which in turn connects to all auxiliary communication holes 151. The two ends of the bypass channel 131, the annular channel, and the bottom end surface of the bypass rotor shaft are all in a low-pressure area, reducing axial force.

[0049] In order to ensure that the bottom end surface of the bypass rotor shaft 13 and the porous static valve plate 15 are not separated, and to ensure that the bypass rotor shaft 13 is subjected to a small downward axial force, the inner hole size between the hat-shaped upper static sleeve 12 and the partition lower static sleeve 14 must be calculated so that the inner hole size between the hat-shaped upper static sleeve 12 is just slightly smaller than the inner hole size between the partition lower static sleeve 14.

[0050] Furthermore, there are four auxiliary communicating holes 151 , which are evenly distributed at equal angles along the axis of the porous static valve plate 15 , with an angle of 90 degrees between any two of them; and the annular channel is connected to all the auxiliary communicating holes 151 .

[0051] It is worth noting that the modifications to the power short section assembly of the present application are simple, mainly including improving the open upper static sleeve 3 to a cap-shaped upper static sleeve 12, improving the original rotor shaft 7 to a bypass rotor shaft 13, improving the connecting lower static sleeve 18 to a partition lower static sleeve 14, and improving the single-hole static valve plate 9 to a multi-hole static valve plate 15. For structures not mentioned, the original structure is maintained without modification.

[0052] The working principle of the power sub assembly includes the following steps:

[0053] High-pressure water flows in from the water inlet 19 and flows downward through the bypass hole of the cap-shaped upper static sleeve 12, driving the turbine rotor 5 to rotate relative to the turbine stator 6;

[0054] The turbine rotor 5 and the bypass rotor shaft 13 rotate synchronously. Specifically, the upper movable sleeve 4, the turbine rotor 5, the bypass rotor shaft 13 and the lower movable sleeve 17 rotate together. The matching area of ​​the eccentric hole at the bottom end of the bypass rotor shaft 13 and the eccentric hole of the porous static valve plate 15 changes continuously, forming a pressure difference. Both ends of the bypass flow channel 131 are low-pressure areas, which reduces the axial force of the bypass rotor shaft 13.

[0055] This application also discloses an embodiment of a hydraulic oscillator. The hydraulic oscillator comprises the aforementioned power subassembly and an oscillation subassembly, with the oscillation subassembly mounted above the upper connector 1 of the power subassembly. The oscillation subassembly converts the pressure differential across the power subassembly into vibration. Specifically, as the bypass rotor shaft 13 rotates, the matching area between the eccentric hole at the bottom end of the bypass rotor shaft 13 and the eccentric hole of the static valve plate continuously changes, generating a pressure differential.

[0056] Regarding the hydraulic oscillator, in one embodiment, the bypass rotor shaft 13 includes a hollow upper portion 132 and a hollow lower portion 133 separated from each other. The top opening of the bypass flow channel 131 is connected to the hollow upper portion 132, and the bottom opening thereof is opened on the circumferential surface of the hollow lower portion 133, that is, opened from the bottom opening to the side wall of the hollow lower portion 133, and the bottom opening of the bypass flow channel 131 is adjacent to the bottom end surface of the bypass rotor shaft 13.

[0057] The cap-shaped upper static sleeve 12 includes an upwardly extending cap 121. The cap 121 is added to the original open upper static sleeve 3. The cap 121 isolates the opening of the hollow upper portion 132 from the high-pressure water flow, so that the interior of the hollow upper portion 132 remains a low-pressure area.

[0058] The hydraulic oscillator of the present application has an ingeniously designed cap 121, which changes the hollow upper portion 132, which should originally belong to the high-pressure area, into a low-pressure area, and makes the pressure on both sides of the hollow lower portion 133 equal, thereby reducing the downward axial force of the bypass rotor shaft 13.

[0059] Regarding the hydraulic oscillator, in one embodiment, based on the above technical solution, the bypass rotor shaft 13 further includes a diaphragm 134, which separates the hollow upper portion 132 from the hollow lower portion 133. The overall structure of the bypass rotor shaft 13 is basically the same as that of the conventional original rotor shaft. The difference is that circular holes are provided on both side walls of the hollow lower portion 133 of the original rotor shaft. However, the bypass rotor shaft 13 of the present application has a bypass flow channel 131 provided on the side wall of the hollow lower portion 133, and a circular hole is provided on the side wall opposite to the bypass flow channel 131. The top opening of the bypass flow channel 131 is provided on the diaphragm 134, and the bottom opening thereof is adjacent to the bottom end surface of the bypass rotor shaft 13.

[0060] Specifically, if Figure 1 The hollow lower portion 133 of the original rotor shaft 7 has circular holes on both sides. Figure 7A circular hole is formed on one side of the hollow lower portion 133 of the bypass rotor shaft 13 , and a side wall is thickened on the other side and provided with a bypass flow channel 131 .

[0061] Regarding the hydraulic oscillator, the power sub assembly further includes a porous static valve disc 15. The eccentric hole of the porous static valve disc 15 is surrounded by a plurality of auxiliary communication holes 151. The auxiliary communication holes 151 are adjacent to the circumferential surface of the bypass rotor shaft 13 and connect to the bottom opening and the water outlet of the bypass flow channel 131. The bypass flow channel 131 connects the hollow upper portion 132 and the auxiliary communication holes 151.

[0062] The hydraulic oscillator of the present application has a simple structure. Compared with the known structure, only a small number of parts have been improved and optimized, mainly improving the open upper static sleeve 3 into a cap-shaped upper static sleeve 12, improving the original rotor shaft 7 into a bypass rotor shaft 13, and improving the single-hole static valve plate 9 into a porous static valve plate 15; in the improved structure, the cap 121 of the cap-shaped upper static sleeve 12 separates the hollow upper part 132 of the bypass rotor shaft 13 from the high-pressure water flow, so that the interior of the hollow upper part 132 is still a low-pressure area; and the bypass flow channel 131 connects the interior of the hollow upper part 132, the bottom end face of the bypass rotor shaft 13 and the auxiliary connecting hole 151, so that the pressures at these three positions are equal and all belong to the low-pressure area, which greatly reduces the downward axial force of the bypass rotor shaft 13, so that the bypass rotor shaft 13 does not generate axial force or generates very small axial force, further reduces the friction between the lower end face of the bypass rotor shaft 13 and the porous static valve plate 15, and increases the service life of the porous static valve plate 15.

[0063] Regarding the hydraulic oscillator, based on the above technical solution, the power sub assembly further includes a lower rotor sleeve 17 and a partition lower static sleeve 14. The lower rotor sleeve 17 is fixedly mounted within the hollow lower portion 133, and the partition lower static sleeve 14 is mounted within the lower rotor sleeve 17. The lower rotor sleeve 17 and the partition lower static sleeve 14 form a sliding bearing that separates the upper high-pressure zone from the lower low-pressure zone. Specifically, when the bypass rotor shaft 13 rotates, the lower rotor sleeve 17 is fixed relative to the bypass rotor shaft 13 and rotates with it, while the partition lower static sleeve 14 is fixed relative to the housing 10 and remains stationary. The partition lower static sleeve 14 blocks all bypass holes relative to the existing connecting lower static sleeve 18.

[0064] Similarly, the upper movable sleeve 4 and the hat-shaped upper static sleeve 12 have the same matching relationship. The upper movable sleeve 4 and the hat-shaped upper static sleeve 12 form a sliding bearing with a very small gap between the two. The upper movable sleeve 4 is fixed to the bypass rotor shaft 13, and the hat-shaped upper static sleeve 12 is fixed to the housing 10.

[0065] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0067] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A bypass hole type power sub assembly, characterized in that: The invention comprises a cap-shaped upper static sleeve (12) and a bypass rotor shaft (13), wherein the cap-shaped upper static sleeve (12) separates the top opening of the bypass rotor shaft (13) from the high-pressure water flow, and the bypass rotor shaft (13) is provided with a bypass flow channel (131), wherein the bypass flow channel (131) communicates the upper portion of the bypass rotor shaft (13) with the bottom end surface of the bypass rotor shaft (13); The bypass rotor shaft (13) includes a hollow upper portion (132) and a hollow lower portion (133) separated from each other; the top opening of the bypass flow channel (131) is connected to the hollow upper portion (132); the bottom opening is opened on the circumferential surface of the bypass rotor shaft (13), and the bottom opening is adjacent to the bottom end surface of the bypass rotor shaft (13); the cap-shaped upper static sleeve (12) includes a cap (121) extending upward, and the cap (121) separates the opening of the hollow upper portion (132) from the high-pressure water flow; The bypass rotor shaft (13) further comprises a transverse partition (134), the transverse partition (134) separating the hollow upper portion (132) from the hollow lower portion (133); the bypass flow channel (131) is provided with a side wall of the hollow lower portion (133), and a circular hole is provided on the side wall opposite to the bypass flow channel (131); the top opening of the bypass flow channel (131) is provided at the transverse partition (134); The power sub assembly further comprises a porous static valve plate (15), wherein a plurality of auxiliary communication holes (151) are arranged around the eccentric hole of the static valve plate; the auxiliary communication holes (151) are adjacent to the bottom end surface of the bypass rotor shaft (13) and are connected to the bottom end opening of the bypass flow channel (131).

2. The bypass hole type power sub assembly according to claim 1, characterized in that: The power short section assembly further comprises a lower movable sleeve (17) and a partition lower static sleeve (14), wherein the lower movable sleeve (17) is fixedly sleeved on the hollow lower portion (133), and the partition lower static sleeve (14) is sleeved on the lower movable sleeve (17); the lower movable sleeve (17) and the partition lower static sleeve (14) form a sliding bearing that separates the upper high-pressure zone and the lower low-pressure zone.

3. The bypass hole type power sub assembly according to claim 2, characterized in that: An annular channel is formed between the partition lower static sleeve (14) and the porous static valve plate (15), and the bottom end opening of the bypass flow channel (131) is connected to the annular channel, and the annular channel is connected to all the auxiliary communication holes (151).

4. A hydraulic oscillator, characterized in that: Include: The power sub assembly as claimed in claim 1; An oscillating short section assembly is installed above the upper joint (1) of the power short section assembly; the oscillating short section assembly converts the pressure difference generated by the continuously changing matching area between the eccentric hole at the bottom end of the bypass rotor shaft (13) of the power short section assembly and the eccentric hole of the static valve plate into vibration.

5. A hydraulic oscillator according to claim 4, characterized in that: The power short section assembly further comprises a lower movable sleeve (17) and a partition lower static sleeve (14), wherein the lower movable sleeve (17) is fixedly sleeved on the hollow lower portion (133), and the partition lower static sleeve (14) is sleeved on the lower movable sleeve (17); the lower movable sleeve (17) and the partition lower static sleeve (14) form a sliding bearing that separates the upper high-pressure zone and the lower low-pressure zone.

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