Blind plate floating coupling experimental device and method

Abstract

The present invention belongs to the field of well completion engineering of natural gas reservoirs, and specifically relates to a blind plate type floating coupling experimental device and method, which aims to solve the problem of damage to tool threads caused by blind plate pressure bearing tests in the prior art; the device includes a power device, a bearing body, a collecting device and a supporting device, and the power device and the bearing body are connected by a pressure-applying connecting device to provide a blind plate crushing simulation pressure for the floating coupling arranged inside the bearing body; the bearing body includes a first shaft section and a second shaft section, and the interior of the first shaft section is provided with an annular groove to seal the chamber above the blind plate; the inner wall of the second shaft section is provided with a limiting portion for limiting the floating coupling; the collecting device includes a liquid collecting device and a blind plate debris collecting device for collecting debris and filtering the pressure test liquid; the supporting device is used to suspend and support the bearing body; the present invention can protect the tool thread during the tool pressure test, and can realize the separation of debris and pressure test liquid after the blind plate is crushed, with high efficiency and low cost.

Description

Technical Field

[0001] The invention belongs to the field of natural gas reservoir completion engineering, and particularly relates to a blind plate type floating coupling experimental device and method. Background Art

[0002] Currently, floating-assisted casing running technology is the preferred method for assisting casing running in horizontal wells with high water-to-vertical ratios. Blind-plate floating couplings, with their unique advantages such as maintaining the full bore of the wellbore after tool activation and allowing the broken blind plate to be recycled out of the wellbore without drilling or grinding, meet market demand and have broad application prospects. However, the core of blind-plate floating couplings relies on the minimum and maximum pressure-bearing performance of the blind plate to control the tool's reliability. Extensive pressure testing is required before shipment to confirm that each batch of blind plates meets design specifications.

[0003] During indoor testing, frequent threading and unthreading often damages the tool threads or even renders it useless. The debris from the broken blind plate mixes with the pressure test liquid, making it difficult to collect the debris. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the blind plate pressure test in the prior art causes damage to the tool thread, the present invention provides a blind plate floating coupling test device and method.

[0005] A first aspect of the present invention provides a blind plate floating coupling experimental device, comprising a power device, a carrying body, a collection device, and a support device. The carrying body has a hollow chamber. The power device is connected to the carrying body via a pressure communication device to provide a blind plate crushing simulation pressure to a floating coupling disposed within the carrying body.

[0006] The bearing body includes a first shaft segment and a second shaft segment, wherein the second shaft segment is arranged below the first shaft segment and the second shaft segment and the first shaft segment form a lower step structure; an annular groove for accommodating a sealing member is provided inside the first shaft segment to seal the chamber between the blind plate and the power unit; a limiting portion is provided on the inner wall of the second shaft segment to limit the outer wall of the floating coupling;

[0007] The collecting device includes a blind plate debris collecting device and a liquid collecting device. The blind plate debris collecting device is arranged at the bottom of the second shaft segment, and the blind plate debris collecting device is provided with a liquid outlet to collect debris and filter the pressure test liquid; the liquid collecting device is arranged at the bottom of the blind plate debris collecting device to collect the pressure test liquid;

[0008] The supporting device includes a supporting ring and a supporting claw. The supporting ring is installed on the outside of the second shaft segment and the top of the supporting ring is arranged to abut against the end of the first shaft segment; the supporting claw is arranged on the circumference of the supporting ring to suspend and support the supporting body.

[0009] In some preferred embodiments, the pressure communication device includes a circular ring structure and a cover plate, wherein the cover plate is arranged on the top of the circular ring structure and has a pressure test hole; the side wall of the circular ring structure is provided with a first external thread section;

[0010] The end of the first shaft segment is provided with a first internal thread segment matching the first external thread segment;

[0011] The outer diameter of the cover plate is greater than the inner diameter of the first shaft segment.

[0012] In some preferred embodiments, the end of the second shaft segment away from the first shaft segment is provided with a second internal thread segment and a second external thread segment;

[0013] The blind plate debris collection device includes a first cylindrical structure and a limiting plate, wherein the limiting plate is arranged at the bottom of the first cylindrical structure; the side wall of the first cylindrical structure is provided with a third external thread segment matching the second internal thread segment;

[0014] The liquid collecting device includes a second cylindrical structure and a sealing plate, wherein the sealing plate is arranged at the bottom of the second cylindrical structure; the side wall of the second cylindrical structure is provided with a third internal thread segment matching the second external thread segment.

[0015] In some preferred embodiments, the outer diameter of the limiting plate is larger than the inner diameter of the second shaft segment, and the outer diameter of the limiting plate is smaller than the outer diameter of the second shaft segment.

[0016] In some preferred embodiments, the sealing plate and the second cylindrical structure are integrally formed.

[0017] In some preferred embodiments, the limiting portion is a limiting conical surface; the inner diameter of the limiting conical surface is smaller than the inner diameter of the first shaft segment.

[0018] In some preferred embodiments, the outer diameter of the first shaft segment is D1, the outer diameter of the second shaft segment is D2, the outer diameter of the support ring is D3, and D1 ≥ D3 > D2;

[0019] There are multiple supporting claws, and the multiple supporting claws are arranged in an array;

[0020] The distance from the connection point between the supporting claw and the supporting ring to the ground is greater than the distance from the connection point between the supporting claw and the supporting ring to the bottom of the liquid collecting device.

[0021] In some preferred embodiments, the sealing member is a rubber ring;

[0022] There are multiple annular grooves, and the multiple annular grooves are arranged in parallel along the longitudinal direction of the bearing body; there are multiple rubber rings, and the multiple rubber rings are correspondingly arranged in the multiple annular grooves.

[0023] In some preferred embodiments, the first shaft segment and the second shaft segment are integrally formed.

[0024] A second aspect of the present invention provides a blind plate type floating coupling test method. The test method is based on any of the blind plate type floating coupling test devices described above, and includes the following steps: Step S100, installing the blind plate type floating coupling into a preset position inside a body, and connecting a pressure-applying communication device to the supporting body;

[0025] Step S200, connecting the pressure test line of the power device to the pressure test hole of the pressure connection device;

[0026] Start the power device to deliver pressure test liquid into the first shaft section to apply pressure to the blind plate until the blind plate breaks; record the breaking pressure;

[0027] Step S300, collecting blind plate debris by a blind plate debris collecting device; collecting pressure test liquid used for blind plate crushing by a liquid collecting device;

[0028] Step S400, recording the maximum particle size value of the blind plate debris;

[0029] Step S500, reinstall the blind plates of the same batch, repeat steps S100 to S300 after installation, record the maximum particle size value and crushing pressure of the blind plate debris this time, and complete the crushing pressure test of the blind plates.

[0030] The beneficial effects of the present invention are:

[0031] 1) The blind plate floating coupling test device disclosed in the present invention can realize that the pressure test joint is not connected to the tool thread during the floating coupling pressure test process, so as to achieve the purpose of performing crushing tests of different blind plates while protecting the tool thread.

[0032] 2) The blind plate floating coupling test device disclosed in the present invention can realize the detection of the fatigue life of the blind plate of the blind plate floating coupling under upward pressure, downward pressure and alternating pressure, and can obtain effective and reliable test data to provide guidance for actual construction.

[0033] 3) The blind plate floating coupling test device disclosed in the present invention can separate the blind plate debris from the pressure test liquid after the test, which is convenient for the collection and detection of the debris and the recycling and reuse of the pressure test liquid.

[0034] 4) The blind plate floating coupling experimental device disclosed in the present invention has a simple structure, is easy to use, and is reusable.

[0035] 5) The special support frame designed for the blind plate floating coupling experimental device disclosed in the present invention ensures a safe and stable testing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 It is a structural schematic diagram of a specific embodiment of the blind plate floating coupling experimental device of the present invention in a state where pressure is applied to the upper portion of the blind plate;

[0038] Figure 2 yes Figure 1 A schematic diagram of a specific embodiment of the blind plate floating coupling experimental device;

[0039] Figure 3 yes Figure 2 A schematic structural diagram of the carrier body in FIG.

[0040] Figure 4 yes Figure 2 A schematic structural diagram of the supporting device in FIG.

[0041] Figure 5 yes Figure 4 Schematic top view of

[0042] Figure 6 yes Figure 2 A schematic structural diagram of a blind plate debris collection device;

[0043] Figure 7 yes Figure 6 Schematic top view of

[0044] Figure 8 It is a structural schematic diagram of a specific embodiment of the blind plate floating coupling experimental device of the present invention in a state where pressure is applied to the lower part of the blind plate.

[0045] Description of reference numerals:

[0046] 100. Pressure communication device, 110. Ring structure, 120. Cover plate, 130. Pressure test hole;

[0047] 200, bearing body, 210, first shaft segment, 211, first internal thread segment, 212, annular groove, 220, second shaft segment, 221, limiting conical surface, 222, second external thread segment, 223, second internal thread segment;

[0048] 300, blind plate debris collection device, 310, first cylindrical structure, 320, limit plate, 330, liquid outlet;

[0049] 400, liquid collecting device, 410, second cylindrical structure, 420, sealing plate;

[0050] 500, supporting device, 510, supporting ring, 520, supporting claw, 521, tilting bracket, 522, horizontal bracket;

[0051] 610, floating coupling body; 620, blind plate;

[0052] 700. Rubber ring. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0054] The first aspect of the present invention provides a blind plate floating coupling test device, comprising a power unit, a carrier body, a collection device, and a support device. The carrier body has a hollow chamber. The power unit and the carrier body are connected by a pressure-applying communication device to provide blind plate crushing simulation pressure to the floating coupling disposed inside the carrier body. The carrier body comprises a first shaft segment and a second shaft segment, the second shaft segment being disposed below the first shaft segment, and the second shaft segment and the first shaft segment forming a lower step structure. The interior of the first shaft segment is provided with an annular groove for accommodating a sealing member to seal the chamber between the blind plate and the power unit. The inner wall of the second shaft segment is provided with a limiting portion to limit the outer wall of the floating coupling. The collection device comprises a blind plate debris collection device and a liquid collection device. The blind plate debris collection device is disposed at the bottom of the second shaft segment and is provided with a liquid outlet to collect debris and filter the pressure test liquid. The liquid collection device is disposed at the bottom of the blind plate debris collection device to collect the pressure test liquid. The supporting device includes a supporting ring and supporting claws. The supporting ring is installed on the outside of the second shaft segment and the top of the supporting ring is arranged to abut against the end of the first shaft segment; the supporting claws are arranged on the circumference of the supporting ring to suspend and support the supporting body.

[0055] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0056] Refer to the attached Figure 1 To the attached Figure 7A first aspect of the present invention provides a blind plate floating coupling test device, comprising a power device, a carrying body 200, a collection device, and a support device 500. The carrying body has a hollow chamber for accommodating test tools. The power device is connected to the carrying body via a pressure connection device 100 to provide a blind plate crushing simulation pressure to the floating coupling arranged inside the carrying body. In this embodiment, a test pressure liquid required for the blind plate crushing test is provided.

[0057] The bearing body includes a first shaft section 210 and a second shaft section 220. The second shaft section is disposed below the first shaft section, and the second shaft section and the first shaft section form a lower step structure. In this embodiment, the lower step structure at the transition between the second shaft section and the first shaft section is a limiting step that matches the support device. The interior of the first shaft section is provided with an annular groove 212 that accommodates a sealing member to seal the chamber between the blind plate 620 and the power unit, ensuring that the liquid is isolated from the space below the blind plate before the blind plate reaches the crushing pressure. The inner wall of the second shaft section is provided with a limiting portion to limit the outer wall of the floating coupling, that is, to limit the outer wall of the floating coupling body 610, ensuring that the blind plate floating coupling is in the preset position of the bearing body and preventing damage to the outer wall of the blind plate floating coupling during the experiment.

[0058] The collection device includes a blind plate debris collection device 300 and a liquid collection device 400. The blind plate debris collection device is located at the bottom of the second shaft segment and has a liquid outlet 330 to collect debris and filter the pressure test liquid. The liquid collection device is located at the bottom of the blind plate debris collection device to collect the pressure test liquid. The arrangement of the blind plate debris collection device and the liquid collection device allows for the separation of blind plate debris from the pressure test liquid, facilitating the collection and detection of debris and the recycling of the pressure test liquid.

[0059] The support device includes a support ring 510 and a support claw 520. The support ring is installed on the outside of the second shaft segment and the top of the support ring is arranged to contact the end of the first shaft segment to ensure that the test process of the experimental device is smooth; the support claw is arranged on the circumferential side of the support ring to suspend the supporting body in this embodiment to ensure that no damage is caused to the outer wall of the blind plate floating coupling.

[0060] Furthermore, the pressure communication device includes a circular ring structure 110 and a cover plate 120. The cover plate is arranged on the top of the circular ring structure, and a pressure test hole 130 is opened on the cover plate to communicate with the pressure test pipeline of the power device.

[0061] The side wall of the circular ring structure is provided with a first external thread segment; the end of the first shaft segment is provided with a first internal thread segment 211 matching the first external thread segment; the outer diameter of the cover plate is larger than the inner diameter of the first shaft segment; in this embodiment, the pressure-applying connecting device is a pressure test joint, which is detachably connected to the thread of the support body through the pressure test joint, which is convenient for disassembly, simplifies the experimental process while ensuring the connection strength and pressure bearing strength, and improves the experimental efficiency.

[0062] Preferably, the annular structure and the cover plate are integrally formed.

[0063] Furthermore, a second internal thread section 223 and a second external thread section 222 are provided at the end of the second shaft section away from the first shaft section; the blind plate debris collection device includes a first cylindrical structure 310 and a limit plate 320, the limit plate is provided at the bottom of the first cylindrical structure; the side wall of the first cylindrical structure is provided with a third external thread section that matches the second internal thread section; the liquid collection device includes a second cylindrical structure 410 and a sealing plate 420, the sealing plate is provided at the bottom of the second cylindrical structure; the side wall of the second cylindrical structure is provided with a third internal thread section that matches the second external thread section. The blind plate debris collection device is detachably connected to the supporting body through threads, which facilitates the collection and removal of debris after different blind plate crushing experiments; the liquid collection device is detachably connected to the supporting body through threads, which facilitates the collection and removal of pressure test liquid after different blind plate crushing experiments; and facilitates the test simulation of different blind plates in the same batch, without damaging the floating coupling body and obtaining valid test data.

[0064] Preferably, the outer diameter of the limiting plate is larger than the inner diameter of the second shaft segment, and the outer diameter of the limiting plate is smaller than the outer diameter of the second shaft segment, which can ensure the connection strength with the supporting body without affecting the connection between the liquid collecting device and the supporting body.

[0065] Furthermore, the height of the liquid collecting device is greater than the distance from the top of the blind plate debris collecting device to the bottom of the liquid collecting device, thereby ensuring the strength of the liquid collecting device and the supporting body as well as the bearing capacity of the liquid collecting device itself.

[0066] Preferably, the sealing plate and the second cylindrical structure are integrally formed.

[0067] Preferably, the limiting portion is a limiting conical surface 221; the inner diameter of the limiting conical surface is smaller than the inner diameter of the first shaft segment, and the taper of the limiting conical surface is matched with the outer wall of the floating coupling body.

[0068] Preferably, the outer diameter of the first shaft segment is D1, the outer diameter of the second shaft segment is D2, the outer diameter of the support ring is D3, and D1≥D3>D2, so as to further improve the limiting accuracy of the support device on the bearing body.

[0069] Furthermore, there are multiple support claws, and multiple support claws are arranged in an array; the distance from the connection point between the support claw and the support ring to the ground is greater than the distance from the connection point between the support claw and the support ring to the bottom of the liquid collection device, ensuring that the supporting body is suspended and preventing damage to the experimental device during the test.

[0070] Furthermore, the supporting claw includes an inclined bracket 521 and a horizontal bracket 522, one end of the inclined bracket is fixedly connected to the outer wall of the support ring, and the other end is fixedly connected to the horizontal bracket; the horizontal bracket is extended outward to increase the friction between the supporting device and the ground, thereby further ensuring the strength of the supporting device.

[0071] In this embodiment, four supporting claws are provided, and the four supporting claws are arranged in an array around the circumference of the supporting ring to form a reliable support for the supporting body.

[0072] Preferably, the sealing member is a rubber ring 700 .

[0073] Preferably, there are multiple annular grooves, and the multiple annular grooves are arranged in parallel along the longitudinal direction of the bearing body; there are multiple rubber rings, and the multiple rubber rings are correspondingly arranged in the multiple annular grooves, so as to further improve the sealing performance of the required space.

[0074] Preferably, the first shaft segment and the second shaft segment are integrally formed.

[0075] Preferably, the power device is a power pump.

[0076] A second aspect of the present invention provides a blind plate floating coupling test method. The test method is based on any of the blind plate floating coupling test devices described above, and includes the following steps: Step S100: installing the blind plate floating coupling into a preset position within a body, and suspending the floating coupling body in the air by a limit portion provided within the carrier body; and fixing a pressure communication device to the carrier body via threads;

[0077] Step S200, connecting the pressure test line of the power device to the pressure test hole of the pressure connection device, so as to establish a connection between the space above the blind plate inside the carrier body and the power device;

[0078] Start the power device to deliver pressure test liquid into the first shaft section to apply pressure to the blind plate until the blind plate breaks; record the corresponding breaking pressure of the blind plate;

[0079] Step S300, collecting blind plate debris by a blind plate debris collecting device; collecting pressure test liquid used for blind plate crushing by a liquid collecting device;

[0080] Step S400, recording the maximum particle size value of the blind plate debris;

[0081] In step S500, the blind plates of the same batch are reinstalled. After installation, steps S100 to S300 are repeated to record the maximum particle size and crushing pressure of the blind plate debris to complete the crushing pressure test of the blind plate. Through this experimental device, crushing tests of different blind plates can be carried out without damaging the floating coupling body and affecting its practical application.

[0082] Further, refer to the attached Figure 8 The figure shows a schematic structural diagram of a specific embodiment of the blind plate floating coupling test apparatus of the present invention, wherein pressure is applied to the lower portion of the blind plate. In this embodiment, when a pressure crushing test is required on the lower portion of the blind plate, the blind plate floating coupling is inverted inside the carrier body. The outer wall of the inverted floating coupling body is also limited by a limiting portion provided inside the carrier body 200, so that it is suspended in the air. The pump is turned on (i.e., the power device is activated) to increase and decrease pressure at a preset frequency and amplitude for a preset time, simulating the tool (i.e., the blind plate floating coupling) being subjected to continuous alternating bottomhole pressure during the running process to obtain the corresponding fatigue life. The configuration of this experimental apparatus allows for test simulations of well conditions in different regions, obtaining reliable test parameters, and providing reliable data guidance for practical applications. It should be noted that fatigue life test simulations can also be performed on upright tools, and lower portion crushing tests can also be performed on inverted tools to simulate the crushing pressure test of the blind plate subjected to lower pressure during actual running, so these details will not be repeated here.

[0083] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner as long as no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0084] In the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are intended solely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not intended to indicate or imply relative importance.

[0085] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0086] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0087] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A blind plate floating coupling experimental device, characterized in that: The device comprises a power device, a carrying body, a collecting device and a supporting device, wherein the carrying body has a hollow chamber; the power device is connected to the carrying body via a pressure-applying communication device to provide a blind plate crushing simulation pressure to a floating coupling disposed inside the carrying body; The bearing body includes a first shaft segment and a second shaft segment, wherein the second shaft segment is arranged below the first shaft segment and the second shaft segment and the first shaft segment form a lower step structure; an annular groove for accommodating a sealing member is provided inside the first shaft segment to seal the chamber between the blind plate and the power unit; a limiting portion is provided on the inner wall of the second shaft segment to limit the outer wall of the floating coupling; The collecting device includes a blind plate debris collecting device and a liquid collecting device. The blind plate debris collecting device is arranged at the bottom of the second shaft segment, and the blind plate debris collecting device is provided with a liquid outlet to collect debris and filter the pressure test liquid; the liquid collecting device is arranged at the bottom of the blind plate debris collecting device to collect the pressure test liquid; The supporting device includes a supporting ring and a supporting claw. The supporting ring is installed on the outside of the second shaft segment and the top of the supporting ring is arranged to abut against the end of the first shaft segment; the supporting claw is arranged on the circumference of the supporting ring to suspend and support the supporting body.

2. The blind plate floating coupling experimental device according to claim 1, characterized in that: The pressure communication device includes a circular ring structure and a cover plate, wherein the cover plate is arranged on the top of the circular ring structure and a pressure test hole is opened on the cover plate; the side wall of the circular ring structure is provided with a first external thread section; The end of the first shaft segment is provided with a first internal thread segment matching the first external thread segment; The outer diameter of the cover plate is greater than the inner diameter of the first shaft segment.

3. The blind plate floating coupling experimental device according to claim 2, characterized in that: The end of the second shaft segment away from the first shaft segment is provided with a second internal thread segment and a second external thread segment; The blind plate debris collection device includes a first cylindrical structure and a limiting plate, wherein the limiting plate is arranged at the bottom of the first cylindrical structure; the side wall of the first cylindrical structure is provided with a third external thread segment matching the second internal thread segment; The liquid collecting device includes a second cylindrical structure and a sealing plate, wherein the sealing plate is arranged at the bottom of the second cylindrical structure; the side wall of the second cylindrical structure is provided with a third internal thread segment matching the second external thread segment.

4. The blind plate floating coupling experimental device according to claim 3 is characterized in that: The outer diameter of the limiting plate is larger than the inner diameter of the second shaft segment, and the outer diameter of the limiting plate is smaller than the outer diameter of the second shaft segment.

5. The blind plate floating coupling experimental device according to claim 3, characterized in that: The sealing plate and the second cylindrical structure are integrally formed.

6. The blind plate floating coupling experimental device according to claim 1, characterized in that: The limiting portion is a limiting conical surface; the inner diameter of the limiting conical surface is smaller than the inner diameter of the first shaft segment.

7. The blind plate floating coupling experimental device according to claim 1, characterized in that: The outer diameter of the first shaft segment is D1, the outer diameter of the second shaft segment is D2, the outer diameter of the support ring is D3, and D1 ≥ D3 > D2; There are multiple supporting claws, and the multiple supporting claws are arranged in an array; The distance from the connection point between the supporting claw and the supporting ring to the ground is greater than the distance from the connection point between the supporting claw and the supporting ring to the bottom of the liquid collecting device.

8. The blind plate floating coupling experimental device according to claim 1, characterized in that: The sealing member is a rubber ring; There are multiple annular grooves, and the multiple annular grooves are arranged in parallel along the longitudinal direction of the bearing body; there are multiple rubber rings, and the multiple rubber rings are correspondingly arranged in the multiple annular grooves.

9. The blind plate floating coupling experimental device according to claim 1, characterized in that: The first shaft segment and the second shaft segment are integrally formed.

10. A blind plate floating collar test method, characterized in that: The experimental method is based on the blind plate floating collar experimental device according to any one of claims 1 to 9, and comprises the following steps: Step S100: Install the blind plate floating coupling into a preset position inside the body, and connect the pressure-applying communication device to the carrier body; Step S200, connecting the pressure test line of the power device to the pressure test hole of the pressure connection device; Start the power device to deliver pressure test liquid into the first shaft section to apply pressure to the blind plate until the blind plate breaks; record the breaking pressure; Step S300, collecting blind plate debris by a blind plate debris collecting device; collecting pressure test liquid used for blind plate crushing by a liquid collecting device; Step S400, recording the maximum particle size value of the blind plate debris; Step S500, reinstall the blind plates of the same batch, repeat steps S100 to S300 after installation, record the maximum particle size value and crushing pressure of the blind plate debris this time, and complete the crushing pressure test of the blind plates.

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