Multifunctional vibration guiding shoe for deepwater and ultra-deepwater well cementation

Abstract

The invention relates to a deepwater and ultra-deepwater well cementation multifunctional vibration guiding shoe which comprises a radial vibration module and a rotor module, the radial vibration module comprises a stator core shaft, rupture disk assemblies and a rotor assembly, the stator core shaft is of a hollow cylindrical structure with the two ends open, and the rupture disk assemblies are arranged in an inner cavity of the stator core shaft at intervals; the rotor assembly is arranged on the outer wall of the stator core shaft in a sleeving mode, and the stator core shaft is provided with a plurality of flow channels which are in fluid conduction connection with the rotor assembly. The rotary drum is arranged on the outer wall of the stator core shaft in a sleeving mode and located outside the rotor assembly, and the eccentric guide shoe is assembled on the rotary drum and located at the downstream end of the stator core shaft; the axial vibration module comprises an eccentric block, the eccentric block is arranged in the eccentric guide shoe, and an eccentric hole is formed in the eccentric guide shoe. The device can effectively improve the well cementation operation efficiency and quality, and is suitable for well cementation construction under various complex working conditions.

Description

Technical Field

[0001] This invention relates to a multifunctional vibration guide shoe for deep-water and ultra-deep-water cementing, belonging to the field of oil and gas well engineering technology. Background Technology

[0002] Cementing operations are a crucial part of oil and gas exploration and development, and cementing efficiency and quality directly affect the operation cycle and safety. However, the problem of low cementing quality is particularly prominent under complex operating conditions, and existing vibratory cementing tools suffer from drawbacks such as complex structure, complicated operation procedures, and high vibration losses. Therefore, it is necessary to innovate the design of vibratory cementing tools based on their working environment and operating parameters, enabling the tools to have functions such as radial vibration unblocking and axial drag and torque reduction, while also being simple in structure, easy to assemble, and internally drillable. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a multifunctional vibratory guide shoe for deep-water and ultra-deep-water cementing. Using this tool can reduce the accident rate during cementing operations under complex conditions, and can assist in the safe installation of casing in complex wells such as those prone to collapse, deep wells, and wells with large reach, thereby improving cementing quality. Furthermore, this tool has advantages such as simple structure, stable vibration, ease of assembly and manufacturing, long service life, and strong applicability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing includes: A radial vibration module includes a stator mandrel, a rupture disc assembly, and a rotor assembly. The stator mandrel is a hollow cylindrical structure with open ends. The rupture disc assemblies are spaced apart in the internal cavity of the stator mandrel. The rotor assembly is sleeved on the outer wall of the stator mandrel. The stator mandrel is provided with several flow channels that are fluidly connected to the rotor assembly. A rotating drum and an eccentric guide shoe, wherein the rotating drum is sleeved on the outer wall of the stator spindle and located outside the rotor assembly, and the eccentric guide shoe is assembled on the rotating drum and located at the downstream end of the stator spindle; An axial vibration module includes an eccentric block disposed inside an eccentric guide shoe, the eccentric guide shoe having an eccentric hole.

[0006] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibratory shoe preferably includes an upper rupture disc assembly and a lower rupture disc, both of which are hollow cylindrical structures closed at both ends. The upper rupture disc is located upstream of the internal cavity of the stator mandrel, and the lower rupture disc is located midstream of the internal cavity of the stator mandrel. The two form a two-stage sealing mechanism to block the axial flow of fluid, thereby allowing the stator mandrel to guide the direction of fluid flow. Through several flow channels on the stator mandrel, a high-speed swirling flow is formed to impact the wall of the rotor assembly, generating dynamic torque, driving the eccentric block to rotate and generating centrifugal force, thus inducing radial vibration.

[0007] Preferably, the deep-water and ultra-deep-water cementing multifunctional vibratory guide shoe further includes a third-level sealing mechanism, which is located at the downstream end of the stator mandrel and contacts the eccentric guide shoe.

[0008] Preferably, in the deep-water and ultra-deep-water cementing multifunctional vibratory shoe, the third-stage sealing mechanism is a bearing fixing seat, which is also a hollow cylindrical structure with both ends closed, and its closed ends serve as rupture discs.

[0009] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibratory guide shoe, preferably, has a rotor assembly comprising an upper rotor and a lower rotor, both of which are sleeved on the outer wall of the stator mandrel, and are separated from each other by a rotor spiral sealing spacer.

[0010] In the aforementioned deep-water and ultra-deep-water cementing multifunctional vibration guide shoe, preferably, the eccentric block is a baffle and the eccentric hole is an axial flow channel. As the eccentric block rotates, the eccentric hole opens and closes alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration.

[0011] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibratory guide shoe preferably further includes an upstream bearing assembly, which is sleeved on the upstream end of the stator mandrel, and the upper rotor is located downstream of the upstream bearing assembly.

[0012] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibration guide shoe, preferably, includes an upstream bearing assembly comprising a first thrust ball bearing, an upper bearing spacer, a first deep groove ball bearing, an upper bearing pressure ring, and an elastic retaining ring connected sequentially from upstream to downstream, wherein the elastic retaining ring is in contact with the upper rotor.

[0013] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibratory guide shoe preferably further includes a downstream bearing assembly, which is sleeved on the downstream end of the stator mandrel, and the lower rotor is located upstream of the upstream bearing assembly.

[0014] The aforementioned deep-water and ultra-deep-water cementing multifunctional vibration guide shoe, preferably, includes a downstream bearing assembly comprising an anti-rotation keyway, two sets of second deep groove ball bearings, a lower bearing spacer, a second thrust ball bearing, and a lower bearing pressure ring connected sequentially from upstream to downstream, wherein the lower bearing pressure ring is in contact with the bearing mounting seat.

[0015] The present invention has the following advantages due to the adoption of the above technical solutions: 1. This invention employs eccentric rotating guide shoe and bidirectional vibration technology, which can improve cementing quality, reduce resistance and friction, and increase the success rate of safe installation of cementing casing in complex wells such as deep wells, extended reach wells, and wells prone to collapse.

[0016] 2. The tool structure of this invention has strong external integrity and no weak points, ensuring safe operation and improving cementing efficiency; the internal structure adopts a modular design, and the internal parts are mainly connected by shafts and keys, which facilitates assembly.

[0017] 3. The tool of the present invention has high safety. It adopts the special connection method and does not require external drilling. It can be safely applied to complex working conditions. The tool has a reasonable design structure, is easy to use, and has low processing cost. It does not require changes to the existing cementing operation process. It has a long vibration amplitude range and high vibration frequency, which can effectively improve the quality and efficiency of cementing operations.

[0018] 4. The device of this invention possesses both axial and radial vibration functions and integrates a rotating guide shoe, significantly improving its overall performance. The tool has a short overall length, strong external structural integrity, and a modular internal design for easy assembly. The tool is made of 7075 aluminum alloy, offering high drillability. This invention achieves optimization in both structural design and material application, effectively improving cementing operation efficiency and quality, and is suitable for cementing operations under various complex conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a multifunctional vibration guide shoe structure for deep-water and ultra-deep-water cementing, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the stator mandrel structure provided in this embodiment of the present invention; Figure 3 This is a schematic diagram of the upper bearing spacer structure provided in this embodiment of the present invention; Figure 4 This is a schematic diagram of the upper bearing pressure ring structure provided in this embodiment of the present invention; Figure 5 This is a schematic diagram of the elastic retaining ring structure provided in this embodiment of the present invention; Figure 6 This is a schematic diagram of the rotating drum provided in this embodiment of the present invention; Figure 7 This is a schematic diagram of the upper rotor structure provided in this embodiment of the present invention; Figure 8 This is a schematic diagram of the upper rupture disc structure provided in this embodiment of the present invention; Figure 9 This is a schematic diagram of the rotor spiral sealing ring structure provided in this embodiment of the present invention; Figure 10 This is a schematic diagram of the lower rotor provided in this embodiment of the present invention; Figure 11 This is a schematic diagram of the lower rupture disc structure provided in this embodiment of the present invention; Figure 12 This is a schematic diagram of the anti-rotation key cylinder structure provided in this embodiment of the present invention; Figure 13 This is a schematic diagram of the lower bearing spacer structure provided in this embodiment of the present invention; Figure 14 This is a schematic diagram of the lower bearing pressure ring structure provided in this embodiment of the present invention; Figure 15 This is a schematic diagram of the bearing mounting structure provided in this embodiment of the present invention; Figure 16 This is a schematic diagram of the counterweight pressure plate structure provided in this embodiment of the present invention; Figure 17 a is a top view of the eccentric shoe provided in this embodiment of the present invention. Figure 17 b-17e is an axial cross-sectional view of the eccentric guide shoe at different rotation angles; The markings in the diagram are as follows: 1-Stator mandrel; 2-Upper bearing spacer; 3-Upper bearing pressure ring; 4-Elastic retaining ring; 5-Rotor drum; 6-Upper rotor; 7-Upper rupture disc; 8-Rotor spiral sealing spacer; 9-Lower rotor; 10-Lower rupture disc; 11-Anti-rotation keyway; 12-Lower bearing spacer; 13-Lower bearing pressure ring; 14-Bearing mounting seat; 15-Counterweight plate; 16-Eccentric guide shoe; 17-Eccentric block; B1-First thrust ball bearing; B2-First O-ring; B3-First deep groove ball bearing; B4-Second O-ring; B5-Third O-ring; B6-Second deep groove ball bearing; B7-Second thrust ball bearing; B8-Hex socket head cap screw; B9-Elastic washer; B10-Fourth O-ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention are described clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," "third," "fourth," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0022] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "above," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure.

[0023] Cementing operations are a crucial part of oil and gas exploration and development, and cementing efficiency and quality directly affect the operation cycle and safety. However, the problem of low cementing quality is particularly prominent under complex operating conditions, and existing vibratory cementing tools suffer from drawbacks such as complex structure, complicated operation procedures, and high vibration losses. Therefore, it is necessary to innovate the design of vibratory cementing tools based on their working environment and operating parameters, enabling the tools to have functions such as radial vibration unblocking and axial drag and torque reduction, while also being simple in structure, easy to assemble, and internally drillable.

[0024] To address the aforementioned technical issues, this invention provides a multifunctional vibratory guide shoe for deep-water and ultra-deep-water cementing. Through a vibration module, it generates a specific vibration effect, which shortens the cement slurry bonding time, thereby improving cementing quality. The device of this invention features a reasonable design, simple operation, and low processing cost. It does not require changes to existing cementing processes, and boasts a long vibration amplitude range and high vibration frequency, thus improving the quality, safety, and efficiency of cementing operations.

[0025] like Figure 1 , 2 As shown, the multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing involved in this invention includes: The radial vibration module includes a stator mandrel 1, a rupture disc assembly, and a rotor assembly. The stator mandrel 1 is a hollow cylindrical structure with open ends. The rupture disc assemblies are spaced apart in the internal cavity of the stator mandrel 1. The rotor assembly is sleeved on the outer wall of the stator mandrel 1. The stator mandrel 1 is provided with several flow channels that are fluidly connected to the rotor assembly. Rotary drum 5 and eccentric guide shoe 16, the rotary drum 5 is sleeved on the outer wall of the stator spindle 1 and located outside the rotor assembly, the eccentric guide shoe 16 is assembled on the rotary drum 5 and located at the downstream end of the stator spindle 1; The axial vibration module includes an eccentric block 17, which is disposed inside an eccentric guide shoe 16, and the eccentric guide shoe 16 is provided with an eccentric hole.

[0026] Furthermore, the rupture disc assembly includes an upper rupture disc 7 and a lower rupture disc 10, both of which are hollow cylindrical structures closed at both ends. The upper rupture disc 7 is located upstream of the internal cavity of the stator spindle 1, and the lower rupture disc 10 is located midway within the internal cavity of the stator spindle 1. Together, they form a two-stage sealing mechanism to block the axial flow of fluid, thereby allowing the stator spindle 1 to guide the direction of fluid flow. Through several flow channels on the stator spindle 1, a high-speed swirling flow is formed to impact the wall of the rotor assembly, generating dynamic torque, which drives the eccentric block 17 to rotate and generate centrifugal force, thus inducing radial vibration.

[0027] Furthermore, it also includes a third-stage sealing mechanism, which is located at the downstream end of the stator spindle 1 and contacts the eccentric guide shoe 16. The third-stage sealing mechanism is a bearing mounting seat 14, which is also a hollow cylindrical structure with both ends closed, and its closed ends serve as rupture discs.

[0028] Furthermore, the rotor assembly includes an upper rotor 6 and a lower rotor 9, both of which are sleeved on the outer wall of the stator spindle 1 and are separated from each other by a rotor spiral sealing spacer 8.

[0029] Furthermore, the eccentric block 17 is a baffle, and the eccentric hole is an axial flow channel. As the eccentric block 17 rotates, the eccentric hole opens and closes alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration.

[0030] Furthermore, it also includes an upstream bearing assembly, which is sleeved on the upstream end of the stator spindle 1, and the upper rotor 6 is located downstream of the upstream bearing assembly. Specifically, the upstream bearing assembly includes a first thrust ball bearing B1, an upper bearing spacer 2, a first deep groove ball bearing B3, an upper bearing pressure ring 3, and an elastic retaining ring 4 connected sequentially from upstream to downstream. The elastic retaining ring 4 is in contact with the upper rotor 6.

[0031] Furthermore, it also includes a downstream bearing assembly, which is fitted onto the downstream end of the stator spindle 1, with the lower rotor 9 located upstream of the upstream bearing assembly. Specifically, the downstream bearing assembly includes an anti-rotation keyway 11, two sets of second deep groove ball bearings B6, a lower bearing spacer 12, a second thrust ball bearing B7, and a lower bearing retainer 13 connected sequentially from upstream to downstream. The lower bearing retainer 13 is in contact with the bearing mounting base 14.

[0032] like Figure 1 As shown, the installation method for this tool is as follows: Step 1: Before assembly, clean the parts thoroughly, ensuring they are free of burrs, flash, debris, chips, oil, and dust. After fitting the sealing ring onto the upper rupture disc 7, screw it onto the upper rupture disc pressure cylinder, and then install it into the stator mandrel 1. The installation method for the lower rupture disc 10 is the same as for the upper rupture disc 7; that is, after fitting the sealing ring onto the lower rupture disc 10, screw it onto the lower rupture disc pressure cylinder, and then install it into the stator mandrel 1.

[0033] Step 2: First, fix one end of the stator spindle 1. Place the first thrust ball bearing B1 onto the step of the stator spindle 1, ensuring the bearings are installed with the left side loose and the right side tight. Place the first O-ring B2 onto the upper bearing spacer 2 and press it into the step of the stator spindle 1, separating the first thrust ball bearing B1. Place the first deep groove ball bearing B3 onto the step of the stator spindle 1. Place the upper bearing retaining ring 3, fitted with the fourth O-ring B10, onto the step of the stator spindle 1, and finally place the elastic retaining ring 4.

[0034] Step 3: Fit the upper rotor 6 onto the stator mandrel 1 up to the elastic retaining ring 4, then fit the rotor spiral sealing spacer 8 onto the upper rotor 6, paying attention to the fit of the groove. Next, fit the lower rotor 9, ensuring a tight fit with the rotor spiral sealing spacer 8. Finally, insert the anti-rotation keyway 11.

[0035] Step 4: Next, insert the rotating cylinder 5. After inserting the rotating cylinder 5, insert the two sets of second deep groove ball bearings B6 into the stator mandrel 1 in sequence. Then, insert the lower bearing spacer 12, and then insert the second thrust ball bearings B7 in sequence. Finally, insert the lower bearing pressure ring 13.

[0036] Step 5: After configuring the lower bearing, place it into the bearing mounting bracket 14 and align it for fixation.

[0037] Step 6: Finally, assemble the eccentric guide shoe 16, which is equipped with eccentric block 17 and counterweight plate 15, onto the rotating cylinder 05.

[0038] The working principle of the device of the present invention is as follows: (1) Radial vibration module principle: The rupture disc blocks the axial flow of the fluid, and the stator spindle 1 guides the direction of fluid flow. Through the six small flow channels, a high-speed swirling flow is formed to impact the rotor wall, generating dynamic torque, which drives the eccentric block 17 to rotate and generate centrifugal force, thus inducing radial vibration. When the flow channel is blocked, the rupture disc can be punctured to open the axial flow channel and ensure smooth flow.

[0039] (2) Principle of axial vibration module: Eccentric block 17 is a baffle, and eccentric hole is an axial flow channel. As eccentric block 17 rotates, eccentric hole opens and closes alternately, generating periodic pressure fluctuations, forming axial excitation force, and inducing axial vibration. At the same time, rupture discs (upper rupture disc 6 and lower rupture disc 10) and a central hole (the internal cavity of stator spindle 1) are designed. When the flow channel is blocked, pressure can be applied to break through the rupture disc and open the central hole to establish a flow channel.

[0040] (3) Hydraulically driven eccentric guide shoe: The low displacement, high torque rotatable eccentric guide shoe 16 has its asymmetrical shape structure cut off on one side, and the weight eccentricity of the guide shoe is further enhanced by drilling, lead filling and other technical means to improve the vibration effect.

[0041] (4) Flow channel blockage protection structure: To ensure that the effective axial vibration amplitude of the axial vibration module is not less than 3 mm, this invention uses this amplitude as the design target and performs reverse calculation on the minimum flow channel size of the axial vibration module. The calculation results show that, under the condition of meeting the vibration amplitude requirements of the design, the equivalent flow channel diameter (upper rupture disc 7 and lower rupture disc 10) should be 29 mm. In addition, to ensure the full flow of cement slurry in the flow channel, this invention introduces a rupture disc mechanism. When the flow channel is blocked, pressure (≥8 MPa) can be applied to rupture the rupture discs (the closed surfaces at both ends of the bearing fixing seat 14 in the axial direction), thereby ensuring that the cement slurry can flow smoothly in the flow channel.

[0042] The multi-functional vibratory guide shoe for deep-water and ultra-deep-water cementing provided by this invention is installed at the lower end of the casing string and lowered to the bottom of the well. During the cementing process, through fluid circulation, it generates continuous and regular strong vibrations, which act on the casing string and cement slurry, reducing friction and accelerating mud bonding. This invention features a reasonable design, simple operation, and low manufacturing cost. It does not require changes to existing cementing processes, has a long vibration amplitude range, and high vibration frequency, improving the success rate and efficiency of cementing operations. This invention does not change the existing casing running process but improves and enhances operational efficiency, meeting the actual requirements of cementing operations under complex conditions. This tool and its usage method are mainly used for cementing operations. Its special internal and external structure ensures tool reliability and generates vibration waves of a certain intensity throughout the well section. During cementing operations, it accelerates mud bonding, prevents mud-water mixing, improves cementing quality, and ensures operational safety. This invention features a reasonable design, simple operation, and low manufacturing cost. It does not require changes to existing cementing processes, has a long vibration amplitude range, and high vibration frequency, improving the safety and efficiency of cementing operations.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing, characterized in that, include: The radial vibration module includes a stator mandrel (1), a rupture disc assembly, and a rotor assembly. The stator mandrel (1) is a hollow cylindrical structure with open ends. The rupture disc assemblies are spaced apart in the internal cavity of the stator mandrel (1). The rotor assembly is sleeved on the outer wall of the stator mandrel (1). The stator mandrel (1) is provided with several flow channels that are fluidly connected to the rotor assembly. Rotary drum (5) and eccentric guide shoe (16), wherein the rotary drum (5) is sleeved on the outer wall of the stator spindle (1) and located outside the rotor assembly, and the eccentric guide shoe (16) is assembled on the rotary drum (5) and located at the downstream end of the stator spindle (1); The axial vibration module includes an eccentric block (17), which is disposed inside the eccentric guide shoe (16), and the eccentric guide shoe (16) is provided with an eccentric hole.

2. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 1, characterized in that, The rupture disc assembly includes an upper rupture disc (7) and a lower rupture disc (10), both of which are hollow cylindrical structures with closed ends. The upper rupture disc (7) is located upstream of the internal cavity of the stator spindle (1), and the lower rupture disc (10) is located midstream of the internal cavity of the stator spindle (1). The two form a two-stage sealing mechanism to block the axial flow of fluid, thereby allowing the stator spindle (1) to guide the direction of fluid flow. Through several flow channels on the stator spindle (1), a high-speed swirling flow is formed to impact the wall of the rotor assembly, generating power torque, which drives the eccentric block (17) to rotate and generate centrifugal force, causing radial vibration.

3. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 2, characterized in that, It also includes a third-level sealing mechanism, which is located at the downstream end of the stator spindle (1) and is in contact with the eccentric guide shoe (16).

4. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 3, characterized in that, The third-level sealing mechanism is a bearing fixing seat (14), which is also a hollow cylindrical structure with both ends closed, and its closed ends serve as rupture discs.

5. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 1, characterized in that, The rotor assembly includes an upper rotor (6) and a lower rotor (9), both of which are sleeved on the outer wall of the stator spindle (1) and are separated from each other by a rotor spiral sealing ring (8).

6. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 1, characterized in that, The eccentric block (17) is a baffle, and the eccentric hole is an axial flow channel. As the eccentric block (17) rotates, the eccentric hole opens and closes alternately, generating periodic pressure fluctuations, forming axial excitation force, and causing axial vibration.

7. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 5, characterized in that, It also includes an upstream bearing assembly, which is sleeved on the upstream end of the stator mandrel (1), and the upper rotor (6) is located downstream of the upstream bearing assembly.

8. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 7, characterized in that, The upstream bearing assembly includes a first thrust ball bearing (B1), an upper bearing spacer (2), a first deep groove ball bearing (B3), an upper bearing pressure ring (3), and an elastic retaining ring (4) connected sequentially from upstream to downstream. The elastic retaining ring (4) is in contact with the upper rotor (6).

9. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 8, characterized in that, It also includes a downstream bearing assembly, which is sleeved on the downstream end of the stator mandrel (1), and the lower rotor (9) is located upstream of the upstream bearing assembly.

10. The multi-functional vibration guide shoe for deep-water and ultra-deep-water cementing as described in claim 9, characterized in that, The downstream bearing assembly includes an anti-rotation keyway (11), two sets of second deep groove ball bearings (B6), a lower bearing spacer (12), a second thrust ball bearing (B7), and a lower bearing pressure ring (13) connected sequentially from upstream to downstream. The lower bearing pressure ring (13) is in contact with the bearing mounting base (14).

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