Device and method for testing the effect of vibration on cement bonding strength in a multi-factor environment

Abstract

The present invention discloses a testing device and method for determining the effect of vibration on cement bond strength in a multi-factor environment. The method relates to the technical field of cement sheath interface bond strength testing. The method comprises a sealed tubular furnace, a vibrating sleeve assembly, a cement curing device, a bond strength testing assembly, and a controller. The cement curing device is disposed within the sealed tubular furnace, and the vibrating sleeve is slidably disposed within the cement curing device. An annular cavity for pouring the cement sheath is formed between the vibrating sleeve and the cement curing device. A gland is disposed at the top of the annular cavity, and a guide groove is disposed within the gland at the top thereof to mate with the vibrating sleeve. A pressure-maintaining cavity is disposed between the sealed tubular furnace, the cement curing device, and the gland. The method also includes a feed pipe, a discharge pipe, a carbon dioxide inlet pipe, a nitrogen inlet pipe, and an exhaust pipe. The method is rationally designed and can simulate the effects of different vibration parameters on the cement sheath bond strength after cement slurry is injected under high temperature and high pressure. Furthermore, the method can detect the effect of carbon dioxide injection on the cement sheath bond strength after the cement sheath is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of cement sheath interface bonding strength testing, and more particularly to a testing device and method for testing the influence of vibration on cement bonding strength in a multi-factor environment. Background Art

[0002] As oil and gas field development progresses, the oil and gas resources within the wells are gradually extracted, rendering conventional production methods ineffective in the later stages of well development. Enhanced oil and gas recovery (ERR) technologies are needed to improve well development efficiency. CO2 flooding is currently one of the most effective methods for enhancing oil and gas recovery. The injection of CO2 gas can alter the microstructure of the cement sheath, damaging it, reducing its compressive strength, and increasing its permeability. It can also corrode the well casing, potentially damaging the cement sheath and annulus isolation system.

[0003] The primary function of a cement sheath is to support the casing, isolate oil, gas, and water zones, and provide an alkaline environment to prevent casing corrosion. In the construction industry, vibration waves are used to make the cement sheath more uniform and dense, particularly during concrete pouring, thereby improving the bond between concrete and rebar. Based on this, researchers are considering applying the energy generated by vibration waves to cementing sites, using them to enhance the cement sheath bond strength within the annular space of the sealing section. Summary of the Invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a testing device and method for the influence of vibration on cement bonding strength in a multi-factor environment.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] One aspect of the present invention provides a device for testing the effect of vibration on cement bonding strength in a multi-factor environment, comprising a sealed tube furnace, a vibration sleeve assembly, a cement curing device, a bonding strength testing assembly, and a controller. The cement curing device is disposed inside the sealed tube furnace, the vibration sleeve is slidably disposed inside the cement curing device, an annular cavity for pouring a cement ring is formed between the vibration sleeve and the cement curing device, a gland is disposed at the top of the annular cavity, and a guide groove is disposed at the top of the gland to cooperate with the vibration sleeve; a pressure-maintaining cavity is disposed between the sealed tube furnace, the cement curing device, and the gland.

[0007] A feed pipe and a discharge pipe communicating with the annular cavity are provided on the side wall of the sealed tube furnace. A carbon dioxide inlet pipe, a nitrogen inlet pipe and an exhaust pipe communicating with the interior of the pressure-maintaining cavity are provided on the side wall of the sealed tube furnace.

[0008] In one embodiment, the sealed tube furnace includes a sealed kettle body with an open end and a sealed lower end, a sealed kettle cover sealed on the top of the sealed kettle body, and a heating resistance wire spirally arranged on the inside of the sealed kettle body, the outer material of the sealed kettle body is a heat-insulating material, and the inner material of the sealed kettle body is a heat-resistant material;

[0009] The cement curing device and cement ring are fixed at the bottom of the sealed kettle body, and the bonding strength testing component is an oil cylinder jacking mechanism.

[0010] Specifically, the sealed kettle cover is connected to the top of the sealed kettle body through a sealing thread to ensure the sealing performance of the sealed kettle body. The sealed kettle body is embedded with a resistance wire for heating; the exterior of the sealed kettle body is made of thermal insulation material to reduce heat loss, and the interior is made of materials that can withstand high temperatures.

[0011] In one embodiment, a pressure gauge for testing the air pressure in the pressure-maintaining cavity is provided on the sealed kettle cover; a carbon dioxide inlet pipe and a nitrogen inlet pipe are combined and connected to the interior of the pressure-maintaining cavity; a gas flow meter and a carbon dioxide injection port valve are provided on the carbon dioxide inlet pipe; a nitrogen injection port valve is provided on the nitrogen inlet pipe; a material injection port valve is provided on the feed pipe, and an exhaust port valve is provided on the exhaust pipe;

[0012] The pressure gauge, gas flow meter, injection port valve, carbon dioxide injection port valve, nitrogen injection port valve and exhaust port valve are all connected to the controller signal. Other valves are also connected to the controller signal.

[0013] In one embodiment, the vibration sleeve assembly includes a vertically arranged vibration sleeve shell, an upper sleeve sealing cover arranged at the top of the vibration sleeve shell, a lower sealing cover arranged at the bottom of the vibration sleeve shell, a Bluetooth motor fixedly arranged at the top of the vibration sleeve shell, and an eccentric vibrator arranged on the output shaft of the Bluetooth motor.

[0014] In one embodiment, the eccentric vibrator includes a strength eccentric block (the strength eccentric block is used to adjust the intensity and direction of the vibration) and a centering eccentric block (the centering eccentric block is used to change the magnitude and direction of the exciting force generated by the vibration motor). The output shaft of the Bluetooth motor is a D-type shaft. The output shaft of the Bluetooth motor is fixed to the strength eccentric block and the centering eccentric block in the circumferential direction with a D-type key, and steps and nuts are used in the axial direction. The Bluetooth motor is also connected to the controller.

[0015] In one embodiment, the vibration sleeve further includes a high temperature resistant battery, which is installed in the vibration sleeve housing and located on top of the Bluetooth motor.

[0016] Specifically, the vibration casing has a groove on one side for mounting the Bluetooth motor, while the other side houses the strength and centering eccentric blocks. The Bluetooth motor's output shaft is secured to the eccentric vibrator with flat keys circumferentially and with steps and nuts axially. The lower sealing cap of the casing is connected to the outer casing of the vibration casing via sealing threads. During installation, after connecting the high-temperature-resistant battery and Bluetooth motor on the other side of the vibration casing, tighten the upper sealing cap.

[0017] In one embodiment, the cement curing device includes a retaining frame located at the bottom of the sealed kettle body and a simulated formation installed on the retaining frame.

[0018] In one embodiment, the bonding strength testing assembly includes an oil storage tank located in a sealed kettle body, a lifting cylinder vertically arranged at the bottom of the sealed kettle body, a lifting piston slidingly sealed in the lifting cylinder, a cylinder drive assembly for driving the lifting piston to rise and fall, and a hydraulic oil safety release assembly; the top of the lifting piston is in contact with the bottom of the vibration sleeve assembly.

[0019] In one embodiment, the hydraulic oil safety release assembly includes a safety oil pipe connected to the oil storage tank and the lifting cylinder, the safety oil pipe is provided with a spring check valve and a safety release valve that controls the opening and closing of the spring check valve, the safety release valve is provided with a safety release rod, and the safety release valve is provided with a sealing gasket.

[0020] In one embodiment, the cylinder drive assembly includes a cylinder body, an operating piston slidingly sealed in the cylinder body by a second sealing gasket, an oil suction pipe whose two ends are respectively connected to the oil storage tank and the interior of the cylinder body, an oil suction check valve arranged on the oil suction pipe, an oil outlet pipe whose two ends are respectively connected to the oil storage tank and the lifting cylinder, and a ball check valve arranged on the oil outlet pipe.

[0021] Another aspect of the present invention provides a method for testing cement bond strength under the influence of multi-factor vibration, using the above-mentioned testing device for the influence of vibration on cement bond strength in a multi-factor environment, comprising the following steps:

[0022] S1. Loosen the safety release valve to return the lifting piston to its original position, then tighten the safety release valve and lift the operating piston to its highest position. Soak the artificial formation in water and place it into the groove of the artificial formation fixing frame of the assembled sealing body. Connect the artificial formation to the injection pipe.

[0023] S2. After assembling the vibration casing assembly, place the vibration casing shell into the groove in the center of the tubular sealing kettle base; after injecting drilling fluid, tighten the gland and screw the sealing kettle cover onto the sealing kettle body;

[0024] S3. Open the nitrogen inlet valve and outlet valve, ventilate for 3 minutes, close the outlet valve first and then close the nitrogen inlet valve; turn on the sealed kettle heating switch to heat to a predetermined temperature; open the nitrogen inlet valve to increase pressure until the pressure gauge on the sealed kettle cover reaches a predetermined value, then close the nitrogen inlet valve;

[0025] S4. Open the injection port valve to inject drilling fluid and open the discharge port valve to release drilling fluid to start flushing the casing wall and the well wall. After flushing for 30 minutes, stop injecting drilling fluid. After the drilling fluid is completely discharged, close the discharge port valve and start injecting the configured predetermined amount of cementing slurry.

[0026] S5. After the cement slurry is injected, the computer is connected to the Bluetooth motor to start vibrating according to the predetermined frequency, amplitude, and time;

[0027] S6. After the vibration is completed, the Bluetooth turns off the motor and continues to maintain the same conditions to cure the cement stone. When the cement stone is cured, the gas outlet valve is opened to release a portion of nitrogen and then the gas outlet valve is closed. The carbon dioxide injection port valve is then opened to inject a predetermined amount of carbon dioxide. The carbon dioxide injection port valve is then closed and the nitrogen injection port valve is opened to inject nitrogen until the pressure in the kettle reaches a predetermined value and then the cement ring is cured.

[0028] S7. When the cement sheath curing time reaches the predetermined value, the outlet valve is opened and the operating end piston is pressed externally. The lifting end piston rises and squeezes the vibrating casing, causing relative sliding between the vibrating casing and the cement sheath. This value is recorded by the computer and the interfacial bond strength of the cement sheath is calculated. The effect of carbon dioxide concentration on the bond strength of the cement sheath is quantitatively discussed.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. This device is well designed. On the one hand, it can simulate the effect of different vibration parameters on the cement sheath bond strength after cement slurry injection under high temperature and high pressure environment. On the other hand, it can also detect the effect of carbon dioxide injection on the cement sheath bond strength after the cement sheath is formed.

[0031] 2. It can accurately control the parameters of temperature, pressure, carbon dioxide concentration and vibration, and completely simulate the working environment of the vibration cementing tool in the well, especially facilitating the selection of the optimal vibration parameters in high temperature and high pressure corrosion cementing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a structural diagram of a strength eccentric block or a centering eccentric block;

[0035] Figure numerals: 1-pressure gauge, 2-sealing kettle cover, 3-sealing kettle body, 4-pressure cover, 5-simulated formation, 6-upper sealing cover, 7-injection port valve, 8-vibration casing housing, 9-high temperature resistant battery, 10-Bluetooth motor, 11-heating resistance wire, 12-motor shaft, 13-exhaust port valve, 14-retaining frame, 15-oil storage tank, 16-safety release valve, 17-safety release rod, 18-sealing gasket, 19-spring check valve, 20-sealing ring, 21-lifting piston, 22-ball check valve, 23-lower sealing cover, 24-second sealing gasket, 25-oil suction check valve, 26-operating piston, 27-oil cylinder body, 28-exhaust port valve, 29-nut, 30-centering eccentric block, 31-strength eccentric block, 32-carbon dioxide injection port valve, 33-gas flow meter, 34-nitrogen injection port valve, 35-computer. DETAILED DESCRIPTION

[0036] To make the technical problems, technical solutions, and technical effects of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0040] like Figure 1 As shown, the present invention provides a testing device for the effect of vibration on cement bonding strength in a multi-factor environment, comprising a sealed tube furnace, a vibration sleeve assembly, a cement curing device, a bonding strength testing assembly, and a controller. The cement curing device is disposed inside the sealed tube furnace, the vibration sleeve is slidably disposed inside the cement curing device, an annular cavity for pouring a cement ring is formed between the vibration sleeve and the cement curing device, a gland 4 is disposed at the top of the annular cavity, and a guide groove cooperating with the vibration sleeve is disposed at the top of the gland 4; a pressure-maintaining cavity is disposed between the sealed tube furnace, the cement curing device, and the gland 4.

[0041] A feed pipe and a discharge pipe communicating with the annular cavity are provided on the side wall of the sealed tube furnace. A carbon dioxide inlet pipe, a nitrogen inlet pipe and an exhaust pipe communicating with the interior of the pressure-maintaining cavity are provided on the side wall of the sealed tube furnace.

[0042] In one embodiment, the sealed tube furnace includes a sealed kettle body 3 with openings at both ends, a sealed kettle cover 2 sealed on the top of the sealed kettle body 3, and a heating resistance wire 11 spirally arranged inside the sealed kettle body 3. The outer material of the sealed kettle body 3 is a heat-insulating material, and the inner material of the sealed kettle body 3 is a heat-resistant material.

[0043] The cement curing device and the cement ring are fixed to the bottom of the sealed kettle body 3, and the bonding strength testing component is an oil cylinder lifting mechanism.

[0044] Specifically, the sealed kettle cover 2 is connected by a sealing thread and screwed on the top of the sealed kettle body 3 to ensure the sealing performance of the sealed kettle body 3. The sealed kettle body 3 is embedded with a resistance wire for heating; the exterior of the sealed kettle body 3 is made of heat-insulating material to reduce heat loss, and the interior is made of materials that can withstand high temperatures.

[0045] In one embodiment, a pressure gauge 1 for testing the air pressure in the pressure-maintaining cavity is provided on the sealed kettle cover 2. The carbon dioxide inlet pipe and the nitrogen inlet pipe are combined and connected to the interior of the pressure-maintaining cavity. A gas flow meter 33 and a carbon dioxide injection port valve 32 are provided on the carbon dioxide inlet pipe, and a nitrogen injection port valve 34 is provided on the nitrogen inlet pipe; a material injection port valve 7 is provided on the feed pipe, and an exhaust port valve 13 is provided on the exhaust pipe;

[0046] The pressure gauge 1, the gas flow meter 33, the injection port valve 7, the carbon dioxide injection port valve 32, the nitrogen injection port valve 34 and the exhaust port valve 13 are all connected to the controller signal.

[0047] In one embodiment, the vibration sleeve assembly includes a vertically arranged vibration sleeve shell 8, a sleeve upper sealing cover 6 arranged at the top of the vibration sleeve shell 8, a lower sealing cover 23 arranged at the bottom of the vibration sleeve shell 8, a Bluetooth motor 10 fixedly arranged at the top of the vibration sleeve shell 8, and an eccentric vibrator arranged on the output shaft of the Bluetooth motor 10.

[0048] In one embodiment, the eccentric vibrator includes a strength eccentric block 31 and a centering eccentric block 30 . The output shaft of the Bluetooth motor 10 is fixed to the strength eccentric block 31 and the centering eccentric block 30 circumferentially using flat keys and axially using steps and nuts 29 .

[0049] In one embodiment, the vibration sleeve further includes a high temperature resistant battery 9 , which is installed in the vibration sleeve housing 8 and located on top of the Bluetooth motor 10 .

[0050] Specifically, the vibration sleeve has a groove on one side for mounting the Bluetooth motor 10, and on the other side, a strength eccentric block 31 and a centering eccentric block 30 are installed. The output shaft of the Bluetooth motor 10 is a D-shaped shaft, secured circumferentially to the eccentric vibrating element using a D-key and axially using a step and nut 29. The lower sealing cap 23 of the sleeve is connected to the vibration sleeve housing 8 via a sealing thread. During installation, after connecting the high-temperature resistant battery 9 and Bluetooth motor 10 on the other side of the vibration sleeve, tighten the upper sealing cap 6.

[0051] In one embodiment, the cement curing device includes a retaining frame 14 located at the bottom of the sealed kettle body 3 and a simulated formation 5 installed on the retaining frame 14 .

[0052] In one embodiment, the bonding strength testing assembly includes an oil storage tank 15 located in the sealed kettle body 3, a lifting cylinder vertically arranged at the bottom of the sealed kettle body 3, a lifting piston 21 with a sliding seal arranged in the lifting cylinder, a cylinder drive assembly that drives the lifting piston 21 to rise and fall, and a hydraulic oil safety release assembly; the top of the lifting piston 21 is in contact with the bottom of the vibration sleeve assembly.

[0053] In one embodiment, the hydraulic oil safety release assembly includes a safety oil pipe connected to the oil storage tank 15 and the lifting cylinder, and a spring check valve 19 and a safety release valve 16 for controlling the opening and closing of the spring check valve 19 are provided on the safety oil pipe. A safety release rod 17 is provided on the safety release valve 16, and a sealing gasket 18 is provided on the safety release valve 16.

[0054] The cylinder drive assembly includes a cylinder body 27, an operating piston 26 that is slidably sealed in the cylinder body 27 by a second sealing gasket 24, an oil suction pipe whose two ends are respectively connected to the oil storage tank 15 and the interior of the cylinder body 27, an oil suction check valve 25 arranged on the oil suction pipe, an oil outlet pipe whose two ends are respectively connected to the oil storage tank 15 and the lifting cylinder, and a ball check valve 22 arranged on the oil outlet pipe.

[0055] Example 1

[0056] This embodiment is a test device for the effect of vibration on cement bond strength in a multi-factor environment. The specific process is as follows:

[0057] After loosening the safety release valve 16 to release pressure, turn the safety release lever 17 to tighten the safety release valve 16. Compress the spring-loaded check valve 19 to prevent the hydraulic oil in the oil reservoir 15 from flowing back. Raise the operating piston 26 to its highest position. The hydraulic oil in the oil reservoir 15 will flow into the operating piston 26 cavity through the suction pipe. The suction check valve 25 will prevent the hydraulic oil in the cavity from flowing back into the oil reservoir 15. Place the simulated formation 5 retainer 14 inside the tubular sealed kettle 3 and secure it with bolts. Next, place the simulated formation 5 inside, and then insert the assembled vibration casing assembly into the groove at the bottom of the tubular sealed kettle 3. After injecting drilling fluid into the annular cavity, tighten the gland 4, and finally tighten the sealing kettle cover 2. Place the Bluetooth motor 10 in the groove of the vibration casing shell 8, then place the high-temperature resistant battery 9, and tighten the sealing cover 6 on the vibration casing. Then, install the strength eccentric block 31 and the centering eccentric block 30 on the shaft of the Bluetooth motor 10, and then tighten the nut 29. The motor shaft 12 adopts a D-type shaft and a strength eccentric block 31 and a centering eccentric block 30 for circumferential fixation;

[0058] Open the injection port valve 7 to inject drilling fluid while simultaneously opening the discharge port valve 28 to discharge drilling fluid, simulating the impact of drilling fluid on the wellbore wall. Heat the sealed tubular furnace to a predetermined temperature and open the nitrogen injection port valve 34 until the pressure and temperature inside the sealed tubular furnace reach predetermined values. Maintain this temperature for 30 minutes, then close the injection port valve 7 to discharge the drilling fluid.

[0059] After the drilling fluid is completely drained, the outlet valve 28 is closed, and the injection port valve 7 is opened to inject the standard cement slurry prepared according to the GBT19139-2012 oil well cement test method, and then the injection port valve 7 is closed. The Bluetooth motor 10 is controlled by the computer 35 to start vibrating according to the designed parameters. After the cement is cured, the exhaust port valve 13 is opened to release the pressure, and the hydraulic oil pressing the operating piston 26 enters the cavity of the lifting piston 21 through the oil discharge pipe. The hydraulic oil entering the cavity pushes the lifting piston 21 upward under the action of the oil pressure, and then pushes the vibrating casing.

[0060] The bond strength can be obtained according to the following formula.

[0061] ,

[0062] ;

[0063] Where, σ is the bonding strength;

[0064] F2 is the lifting force provided by the lifting piston 21;

[0065] G is the gravity of the vibrating casing;

[0066] h is the height of the cement sheath;

[0067] F1 is the force applied externally to the operating piston 26;

[0068] R is the radius of the vibration casing;

[0069] d is the diameter of the operating piston 26;

[0070] D is the diameter of the lifting piston 21 .

[0071] Example 2

[0072] This embodiment is a test device for the effect of vibration on cement bond strength in a multi-factor environment. The specific process is as follows:

[0073] Loosen the safety release valve 16, return the lifting piston 21 to its original position, then tighten the safety release valve 16. Raise the operating piston 26 to its highest position. Soak the artificial formation in water and place it in the groove of the artificial formation fixing frame of the assembled sealing body, connecting the artificial formation to the injection pipe. Assemble the vibration casing and place it into the groove at the center of the tubular sealing kettle base. After injecting drilling fluid, tighten the gland 4 and screw the sealing kettle cover 2 onto the sealing kettle body 3. Open the nitrogen inlet and outlet valves, allow air to flow for 3 minutes, then close the outlet valve first and then the nitrogen inlet valve. Turn on the heating switch of the sealing kettle body 3 and heat it to the predetermined temperature. Open the nitrogen inlet valve to increase pressure until the pressure gauge 1 on the sealing kettle cover 2 reaches the predetermined value, then close the nitrogen inlet valve. Open the injection valve 7 to inject drilling fluid while opening the discharge valve to release drilling fluid to begin flushing the casing and wellbore walls. After 30 minutes of flushing, drilling fluid injection is stopped. After the drilling fluid is completely drained, the discharge valve is closed and the predetermined amount of cementing slurry injected begins. After the cement slurry is injected, the Bluetooth motor 10 is connected to a computer and begins vibrating at a predetermined frequency, amplitude, and time. After the vibration is complete, the Bluetooth motor is turned off and the cement stone continues to be cured under the same conditions. When the cement stone is cured, the outlet valve is opened to release some nitrogen, then the outlet valve is closed. The carbon dioxide injection valve is then opened and a predetermined amount of carbon dioxide is injected. After the carbon dioxide injection valve is closed, the nitrogen injection valve is opened and nitrogen is injected until the pressure in the kettle reaches a predetermined value. Curing of the cement sheath continues. When the cement sheath curing time reaches a predetermined value, the outlet valve is opened. The operating end piston is pressed externally, causing the lifting end piston to rise and squeeze the vibrating casing, causing relative sliding between the vibrating casing and the cement sheath. This value is recorded by the computer 35 and the interfacial bond strength of the cement sheath is calculated. The effect of carbon dioxide concentration on the bond strength of the cement sheath is quantitatively discussed.

Claims

1. A device for testing the effect of vibration on cement bond strength in a multi-factor environment, characterized in that: The invention comprises a sealed tube furnace, a vibrating sleeve assembly, a cement curing device, a bonding strength test assembly and a controller, wherein the cement curing device is arranged inside the sealed tube furnace, the vibrating sleeve is slidably arranged inside the cement curing device, an annular cavity for pouring a cement ring is formed between the vibrating sleeve and the cement curing device, a pressure cover (4) is arranged on the top of the annular cavity, and a guide groove cooperating with the vibrating sleeve is arranged on the top of the pressure cover (4); a pressure-maintaining cavity is arranged between the sealed tube furnace, the cement curing device and the pressure cover (4); The side wall of the sealed tube furnace is provided with a feed pipe and a discharge pipe connected to the annular cavity, and the side wall of the sealed tube furnace is provided with a carbon dioxide inlet pipe, a nitrogen inlet pipe and an exhaust pipe connected to the interior of the pressure-maintaining cavity; The sealed tubular furnace comprises a sealed kettle body (3) with an open upper end and a sealed lower end, a sealed kettle cover (2) sealed and arranged on the top of the sealed kettle body (3), and a heating resistance wire (11) spirally arranged inside the sealed kettle body (3), the outer material of the sealed kettle body (3) is a heat-insulating material, and the inner material of the sealed kettle body (3) is a heat-resistant material; The cement curing device and the cement ring are fixed to the bottom of the sealed kettle body (3), and the bonding strength testing component is an oil cylinder lifting mechanism; The sealed kettle cover (2) is provided with a pressure gauge (1) for testing the air pressure in the pressure-maintaining cavity; the carbon dioxide inlet pipe and the nitrogen inlet pipe are combined and communicated with the interior of the pressure-maintaining cavity; the carbon dioxide inlet pipe is provided with a gas flow meter (33) and a carbon dioxide injection port valve (32); the nitrogen inlet pipe is provided with a nitrogen injection port valve (34); the feed pipe is provided with a material injection port valve (7); and the exhaust pipe is provided with an exhaust port valve (13); The pressure gauge (1), the gas flow meter (33), the injection port valve (7), the carbon dioxide injection port valve (32), the nitrogen injection port valve (34), and the exhaust port valve (13) are all connected to the controller signal; The vibration sleeve assembly comprises a vertically arranged vibration sleeve housing (8), a sleeve upper sealing cover (6) arranged at the top of the vibration sleeve housing (8), a lower sealing cover (23) arranged at the bottom of the vibration sleeve housing (8), a Bluetooth motor (10) fixedly arranged at the top of the vibration sleeve housing (8), and an eccentric vibrating member arranged on the output shaft of the Bluetooth motor (10); The cement curing device comprises a retaining frame (14) located at the bottom of the sealed kettle body (3) and a simulated stratum (5) mounted on the retaining frame (14).

2. The testing device for the effect of vibration on cement bonding strength in a multi-factor environment according to claim 1, characterized in that: The eccentric vibrating member includes a strength eccentric block (31) and a centering eccentric block (30); the output shaft of the Bluetooth motor (10) is a D-shaped shaft; the output shaft of the Bluetooth motor (10) is fixed to the strength eccentric block (31) and the centering eccentric block (30) in the circumferential direction by using a D-shaped key, and is fixed in the axial direction by using a step and a nut (29); the Bluetooth motor (10) is connected to the controller signal.

3. The testing device for the effect of vibration on cement bonding strength in a multi-factor environment according to claim 2, characterized in that: The vibration sleeve further comprises a high temperature resistant battery (9), which is installed in the vibration sleeve housing (8) and is located on top of the Bluetooth motor (10).

4. The testing device for the effect of vibration on cement bonding strength in a multi-factor environment according to claim 3, characterized in that: The bonding strength test assembly comprises an oil storage tank (15) located in the sealed kettle body (3), a lifting cylinder vertically arranged at the bottom of the sealed kettle body (3), a lifting piston (21) with a sliding seal arranged in the lifting cylinder, a cylinder drive assembly for driving the lifting piston (21) to rise and fall, and a hydraulic oil safety release assembly; the top of the lifting piston (21) contacts the bottom of the vibration sleeve assembly.

5. The testing device for the effect of vibration on cement bonding strength in a multi-factor environment according to claim 4, characterized in that: The hydraulic oil safety release assembly includes a safety oil pipe connected to the oil storage tank (15) and the lifting cylinder, the safety oil pipe is provided with a spring check valve (19) and a safety release valve (16) for controlling the opening and closing of the spring check valve (19), the safety release valve (16) is provided with a safety release rod (17), and the safety release valve (16) is provided with a sealing gasket (18); The oil cylinder drive assembly includes an oil cylinder body (27), an operating piston (26) slidingly sealed in the oil cylinder body (27) by a second sealing gasket (24), an oil suction pipe whose two ends are respectively connected to the oil storage tank (15) and the interior of the oil cylinder body (27), an oil suction check valve (25) arranged on the oil suction pipe, an oil outlet pipe whose two ends are respectively connected to the oil storage tank (15) and the lifting cylinder, and a ball check valve (22) arranged on the oil outlet pipe.

6. A method for testing the effect of vibration on cement bonding strength in a multi-factor environment, using the testing device for testing the effect of vibration on cement bonding strength in a multi-factor environment according to any one of claims 1 to 5, characterized in that: The steps include: S1. Loosen the safety release valve (16) to return the lifting piston (21) to its original position, then tighten the safety release valve (16), lift the operating piston (26) to the highest position, soak the artificial formation in water and place it in the groove of the artificial formation fixing frame of the assembled sealing body, and connect the artificial formation to the injection pipe; S2. After assembling the vibration casing assembly, place the vibration casing shell (8) into the groove at the center of the tubular sealing kettle base; after injecting drilling fluid, tighten the gland (4) and screw the sealing kettle cover (2) onto the sealing kettle body (3); S3. Open the nitrogen inlet valve and outlet valve, and after ventilating for 3 minutes, close the outlet valve first and then the nitrogen inlet valve; turn on the heating switch of the sealed kettle body (3) and heat it to a predetermined temperature; open the nitrogen inlet valve to increase pressure until the pressure gauge (1) on the sealed kettle cover (2) reaches a predetermined value, and then close the nitrogen inlet valve; S4, opening the injection port valve (7) to inject drilling fluid, while opening the discharge port valve to release the drilling fluid and start flushing the casing wall and the well wall; after flushing for 30 minutes, stop injecting the drilling fluid, and after the drilling fluid is completely discharged, close the discharge port valve and start injecting the configured predetermined amount of cementing slurry; S5. After the cement slurry is injected, the computer is connected to the Bluetooth motor (10) to start vibrating according to the predetermined frequency, amplitude, and time; S6. After the vibration is completed, the Bluetooth turns off the motor and continues to maintain the same conditions to cure the cement stone. When the cement stone is cured, the gas outlet valve is opened to release a portion of nitrogen and then the gas outlet valve is closed. The carbon dioxide injection port valve is then opened to inject a predetermined amount of carbon dioxide. The carbon dioxide injection port valve is then closed and the nitrogen injection port valve is opened to inject nitrogen until the pressure in the kettle reaches a predetermined value and then the cement ring is cured. S7. When the cement ring curing time reaches the predetermined value, the outlet valve is opened and the operating end piston is pressed with external force. The lifting end piston rises and squeezes the vibration casing, causing the vibration casing and the cement ring to slide relative to each other. The computer (35) records this value and calculates the interface bonding strength of the cement ring. The effect of carbon dioxide concentration on the bonding strength of the cement ring is quantitatively discussed.

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