CN108386184B - Horizontal well borehole collapse pressure testing device - Google Patents

Abstract

The invention discloses a horizontal well borehole collapse pressure testing device, which comprises a pressure kettle; a diversion plug; an axial thrust mechanism; a displacement control mechanism capable of moving radially relative to the rigid tub; the temperature control mechanism is used for controlling the temperature in the elastic barrel; the infrared measurement mechanism comprises a first probe arranged on the lower side of the first light transmission part and a second probe arranged on the upper side of the second light transmission part and longitudinally corresponding to the first probe, and the first probe and the second probe can synchronously move along the horizontal direction; the guide mechanism comprises a guide rail, a probe clamping mechanism and a motor, and an output shaft of the motor is in transmission connection with the probe clamping mechanism. The technology can monitor the mechanical and displacement information in the rock uniaxial loading test, the rock triaxial mechanical test, the rock creep mechanical test, the rock temperature-change stress loading test and other tests around the well bore.

Description

Borehole collapse pressure test device for horizontal wells

technical field

The invention relates to the field of rock mechanics experiments, in particular to a horizontal well borehole collapse pressure testing device.

Background technique

With the deepening of oil and gas development, the vertical depth of drilling has approached 10,000 meters, the length of open-hole sections of different well types has been increasing, and the temperature environment of deep rocks has increased significantly. During the drilling of high-temperature wells, the temperature of deep rocks can even reach 350 °C As mentioned above, changes in rock temperature will lead to changes in the structure and mechanical properties of rocks. Therefore, it is necessary to accurately understand the influence of temperature changes on rock mechanical properties and damage mechanisms, and to judge and predict the strength of the borehole wall, especially the stability of the borehole wall under high temperature conditions. It has important practical significance for safe drilling engineering.

There are many methods for measuring collapse pressure, such as indoor measurement, calculation by difference method, finite element prediction, etc., but most of them are not used in deep oilfield formations, especially for deep buried deep high-temperature formations. The main reasons are as follows: 1. For shallow low-temperature formations, traditional mechanical testing methods can satisfy the determination of physical parameters of rocks, and the methods are mature, and data acquisition usually adopts mechanical testing methods such as uniaxial and triaxial; 2. With the In the development of high-temperature and high-pressure wells, the combined effects of high temperature and high pressure have intensified the impact on petrophysical parameters, and a single temperature or confining pressure environment simulation can no longer accurately simulate the required environment; 3. Integrating temperature and confining pressure with optical testing to form a A complete test system requires a high degree of integration in the pressure chamber, optical probe and other links.

Therefore, it is imperative to study a set of economical and simple indoor measurement methods and devices to solve the study of wellbore stability mechanics in deep high-temperature well drilling.

Contents of the invention

In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a horizontal well borehole collapse pressure test device, which has a simple and intuitive structure and is easy to operate, and can realize wellbore mechanical experiments of different well types under temperature changes. During the process, the optical signal is collected synchronously, and the identification and processing of the signal and the tracking test of the creep displacement are realized, and then the specific displacement information of the borehole rock temperature to the collapse pressure is obtained.

The specific technical solution of the present invention is: a horizontal well borehole collapse pressure testing device, comprising:

An autoclave, the autoclave includes a pressure chamber extending in the horizontal direction and a test chamber extending in the horizontal direction, the test chamber includes a rigid barrel in the pressure chamber and a rigid barrel in the rigid barrel that can move radially a deformed elastic barrel;

A diversion plug, the diversion plug is arranged on the right side of the elastic barrel for rock accommodation, and the diversion plug has a first light-transmitting portion;

An axial thrust mechanism, the axial thrust mechanism is located on the right side of the rock relative to the diversion plug, the axial thrust mechanism can move relative to the autoclave, and the axial thrust mechanism is located at one end of the autoclave A flow guide mechanism capable of engaging with the pressure chamber and the test chamber is provided, and the flow guide mechanism includes a flow guide mechanism capable of connecting the pressure chamber and the elastic barrel when it is engaged with the pressure chamber and the test chamber. The percolation channels communicated therebetween, the flow guiding mechanism has a second light-transmitting part;

A displacement control mechanism, the displacement control mechanism can move laterally relative to the rigid barrel, one end of the displacement control mechanism is located in the pressure chamber, and the other end of the displacement control mechanism is arranged on the elastic barrel;

a temperature control mechanism, the temperature control mechanism is used to control the temperature in the elastic barrel;

An infrared measurement mechanism, the infrared measurement mechanism includes a first probe arranged on the right side of the first light-transmitting part and a second probe arranged on the left side of the second light-transmitting part and corresponding to the first probe along the lateral direction Probes, the first probe and the second probe can move synchronously along the horizontal direction;

A guide mechanism, the guide mechanism includes a guide rail, a probe clamping mechanism that can move along the extension direction of the guide rail, and a motor with an output shaft. The probe clamping mechanism is used to clamp the first probe or the second probe. For the probe, the output shaft of the motor is in drive connection with the probe clamping mechanism.

Preferably, the autoclave includes an outer cover, and the axial thrust mechanism includes an axial loading device, a thrust rod capable of transmission connection with the axial loading device and pierced on the outer cover, and the thrust rod One end located in the autoclave is fixedly provided with a sealing cover plate that is sealed with the outer cover, and the flow guide mechanism includes a seepage plug that can cooperate with the elastic barrel and has a seepage channel, and is arranged on the seepage plug. The seepage joint on the head, the diversion groove of the seepage joint communicates with the seepage passage of the seepage plug, the seepage passage communicates with the inner cavity of the elastic barrel, and the diversion groove communicates with the pressure chamber.

Preferably, the seepage plug is provided with a protective cover on its side away from the rock, and the protective cover is arranged outside the first probe or the second probe.

Preferably, the pressure chamber has a side wall, and a liquid guide plug communicating with the pressure chamber is provided on the side wall, and the guide tube is penetrated on the side wall.

Preferably, the temperature control mechanism includes a heater extending leftward from the diversion plug.

Preferably, there is a sealed chamber between the diversion plug and the side wall, and the first probe or the second probe is arranged in the sealed chamber.

Preferably, the side of the seepage interface facing the rock is provided with a plurality of diversion grooves arranged in the circumferential direction, and each diversion groove communicates with the seepage channel.

Preferably, a control unit is included, and the control unit is used to control the axial thrust mechanism, the displacement control mechanism, the temperature control mechanism, and the infrared measurement mechanism.

Preferably, the second light-transmitting portion is radially located between the seepage plug and the seepage joint.

The purpose of this application is to provide a collapse pressure testing device for testing rocks under different temperature changes, and the device can realize rock axial pressure control, radial confining pressure control, temperature control, wellbore control, infrared (laser) multiple Point measurement, it can monitor the optical information in wellbore creep mechanics test, wellbore collapse pressure test, horizontal well borehole temperature collapse pressure test and other tests.

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportional dimensions of the components in the present invention. Under the teaching of the present invention, those skilled in the art can select various possible shapes and proportional dimensions according to specific conditions to implement the present invention.

Fig. 1 is a schematic structural diagram of a horizontal well borehole collapse pressure testing device according to an embodiment of the present invention.

Fig. 2 is the bottom view of axial thrust mechanism;

Fig. 3 is a schematic cross-sectional view of Fig. 2;

Fig. 4 is the top view of autoclave;

Fig. 5 is a sectional view of Fig. 4;

Fig. 6 is a structural schematic diagram of a part of the guiding mechanism.

Fig. 7 is a structural schematic diagram of another part of the guiding mechanism.

Figure 8 is a schematic diagram of the rock force test.

The reference signs of the above drawings: 1-pressure kettle; 2-axial thrust mechanism; 3-infrared measurement mechanism; 4-guiding mechanism; 401-support; 402-guide rail; 403-probe clamping mechanism; 404-motor ; 405-gear transmission mechanism; 6-temperature control mechanism; 7-control unit; 201-axial loading device; 202-sealing device; 203-top cover; 204-seepage plug; -seepage interface; 207-sealing cover; 208-seepage channel; 209-protective cover; 301-second probe; 303-interface; 101-pressure chamber; 102-test chamber; 103-displacement control mechanism; 104-guidance Plug; 105-first light-transmitting part; 106-first probe; 107-drainage plug; 108-rigid barrel; 109-elastic barrel; 110-heater.

Detailed ways

The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the horizontal well borehole collapse pressure test device in the embodiment of the present application includes: a pressure kettle 1, and the pressure kettle 1 includes A pressure chamber 101 extending in the horizontal direction and a test chamber 102 extending in the horizontal direction. The test chamber 102 includes a rigid barrel 108 located in the pressure chamber 101 and a rigid barrel 108 located in the rigid barrel 108 that can deform in the radial direction. The elastic barrel 109; the diversion plug 104, the diversion plug 104 is arranged on the left side in the elastic barrel 109, for rock accommodation, the diversion plug 104 has a first light-transmitting part 105 ; Axial thrust mechanism 2, said axial thrust mechanism 2 is located on the right side of the rock relative to said diversion plug 104, said axial thrust mechanism 2 can move relative to said autoclave 1, said axial thrust mechanism 2 One end located in the autoclave 1 is provided with a flow guide mechanism that can be connected with the pressure chamber 101 and the test chamber 102, and the flow guide mechanism includes a connection between the seepage plug 204 and the pressure chamber 101 and The seepage passage 208 connecting the pressure chamber 101 and the elastic barrel 109 when the test chamber 102 is engaged, the flow guide mechanism has a second light-transmitting part 205; the displacement control mechanism 103, the displacement control mechanism 103 can move radially relative to the rigid barrel 108, one end of the displacement control mechanism 103 is located in the pressure chamber 101, and the other end of the displacement control mechanism 103 is arranged on the elastic barrel 109; the temperature control mechanism 5. The temperature control mechanism 5 is used to control the temperature in the elastic barrel 109; the infrared measurement mechanism 3, the infrared measurement mechanism 3 includes a first probe arranged on the right side of the first light-transmitting part 105 106 and the second probe 301 arranged on the left side of the second light-transmitting part 205 and corresponding to the first probe 106 in the longitudinal direction, the first probe 106 and the second probe 301 can move synchronously in the horizontal direction .

With the above structure, the fluid entering from the pressure chamber 101 can enter the elastic barrel 109 from the seepage channel 208 of the seepage plug 204, and the fluid in the pressure chamber 101 can provide a radial force on the elastic barrel 109 through the displacement control mechanism 103, The fluid entering the elastic barrel 109 can provide an axial force on the rock, and the temperature control mechanism 5 can control the temperature of the fluid in the elastic barrel 109 according to the temperature sensor, thereby constructing the high temperature and high pressure structure of the rock. Moreover, the infrared measurement mechanism 3 can also measure the rocks in the elastic barrel 109 .

Referring to FIG. 4 and FIG. 5 , specifically, the autoclave 1 includes a pressure chamber 101 and a test chamber 102 . The pressure chamber 101 has a left side wall and a right side wall. The left side wall of the pressure chamber 101 is connected to the base through a flange connection cover 203 . The right side wall of the pressure chamber 101 is connected to the base through a flange. A liquid guide plug 107 communicating with the pressure chamber 101 is also provided on the right side wall of the pressure chamber 101 .

The test chamber 102 is located in the pressure chamber 101 . The test chamber 102 includes a rigid barrel 108 (eg, made of steel construction) on the outside and a resilient barrel 109 (eg, made of highly deformable metal) on the inside. Wherein, the rigid barrel 108 is fixed on the side wall of the pressure chamber 101 by pins. The elastic barrel 109 can be deformed in the radial direction.

A diversion plug 104 is arranged on the right side of the elastic barrel 109 . Rocks may be placed on the diverter plug 104 and within the elastic barrel 109 . A guide tube communicating with the elastic barrel 109 is provided on the guide plug 104 and the side wall. The guide tube can discharge the fluid in the elastic barrel 109 .

1, the displacement control mechanism 103 can move radially relative to the rigid barrel 108, one end of the displacement control mechanism 103 is located in the pressure chamber 101, and the other end of the displacement control mechanism 103 is set on the elastic barrel 109 . The fluid in the pressure chamber 101 can generate a radial force on the elastic barrel 109 through the displacement control mechanism 103 , so that the elastic barrel 109 deforms in the radial direction. The displacement control mechanism 103 also includes a displacement sensor capable of detecting the radial deformation of the elastic barrel 109 .

Referring to Figures 2 and 3, the axial thrust mechanism 2 includes an axial loading device 201, a thrust rod capable of transmission connection with the axial loading device 201 and passed through the cover 203, the One end of the thrust rod located in the autoclave 1 is fixedly provided with a sealing cover plate 207 which is sealed with the cover body 203 , and the flow guide mechanism includes a seepage plug 204 and a seepage joint. The seepage plug 204 is connected to the seepage interface 206 by bolts, and the seepage interface 206 is fixed on the sealing cover plate 207 by bolts. A sealing device 202 capable of sealing the cover 203 is provided on the thrust rod.

The seepage interface 206 can cooperate and seal with the left side of the pressure chamber 101 , and the seepage plug 204 can cooperate with the left side of the elastic barrel 109 to seal. The side of the seepage interface 206 facing the rock is provided with a plurality of diversion grooves arranged in the circumferential direction, and each diversion groove communicates with the seepage channel 208 . The seepage channel 208 communicates with the inner cavity of the elastic barrel 109 , and the diversion groove communicates with the pressure chamber 101 . The thrust rod of the axial thrust mechanism 2 can move relative to the autoclave 1 to make the pressure chamber 101 communicate with the elastic barrel 109 .

1, in this embodiment, the temperature control mechanism 5 may include a heater 110 extending leftward from the diversion plug 104, a temperature sensor, a temperature display, a signal output interface 303, and a resistance control valve. wait. The temperature of the fluid inside the elastic barrel 109 can be controlled by adjusting the resistance control valve. The temperature control mechanism 5 of the embodiment of the present application further includes a temperature sensor installed in the seepage channel 208 of the axial thrust mechanism 2 . The control unit 6 is respectively connected with the signal output interface 303 and the temperature display, controls the position of the resistance control valve, adjusts the size of the heating resistance, stores temperature data, and displays the current temperature value.

In this embodiment, the seepage plug 204 is provided with a protective cover 209 on the side away from the rock, and the protective cover 209 is provided outside the infrared measurement mechanism 3 . A chamber is formed between the diversion plug 104 and the side wall, and the infrared measuring mechanism 3 is disposed in the chamber.

Referring to FIG. 1 , the first probe 106 is disposed on the right side of the first transparent part 105 . The second probe 301 is disposed on the left side of the second light-transmitting part 205 . Wherein, the first probe 106 and the second probe 301 are arranged correspondingly along the lateral direction. In this embodiment, there are four first probes 106 and four second probes 301 . Certainly, in other optional implementation manners, the number of the first probe 106 and the number of the second probe 301 may be other corresponding ones.

6 and 7, the infrared measurement mechanism 3 also includes a guide mechanism 4, the guide mechanism 4 includes a guide rail 402, a probe clamping mechanism 403 that can move along the extension direction of the guide rail 402 and is arranged on the guide rail 402 1. A motor 404 with an output shaft, the probe clamping mechanism 403 can clamp the first probe 106 or the second probe 301, the output shaft of the motor 404 and the probe clamping mechanism 403 can be engaged through the gear transmission mechanism 405, thereby driving the first The probe 106 or the second probe 301 moves along the guide rail 402 . Preferably, each of the guide rails 402 can be set on an annular support 401, so as to facilitate installation and fixing.

The embodiment of the present application also includes a control unit 6 , which is used to control the axial thrust mechanism 2 , the displacement control mechanism 103 , the temperature control mechanism 5 , and the infrared measurement mechanism 3 . Specifically, the control unit 6 includes a signal receiving and converting block, a computer, and processing software, which can implement temperature, pressure, displacement, and infrared probe measurement and control during the test.

The purpose of the present invention and the solution to its technical problems can be further realized by adopting the following technical measures.

Among them, the radial displacement control device of the test probe is divided into the rock mechanics pressure chamber 101 and the axial thrust mechanism 2, the gear transmission system in the radial displacement control device of the test probe undergoes synchronous displacement, and the radial displacement control device of each test probe Install 4 (not limited to 4) infrared probes on it.

Wherein, the entire test device is a sealed container, and the medium in the liquid storage tank is not limited to water.

The present invention is achieved through the following technical solutions:

A method for testing rock collapse pressure under different temperature changes, the steps are:

Step 1: The wellbore rock is made into a ring shape according to the installation size of the test chamber 102, and installed inside the test chamber 102. The bottom of the test chamber 102 is equipped with a glass bottom plate, a seepage plug 204, a radial displacement control device for the test probe, and an infrared ray Receiving probe and heating system; a seepage plug 204 and a glass cover plate are installed at the lower end of the axial thrust mechanism 2, and the radial displacement control device of the infrared emitting probe, the infrared emitting probe and the temperature testing probe are fixed on the glass cover plate and the cover body 203 In the sealed area; the test probe radial displacement control device can realize the infrared test probe moving along the radial direction of the rock pressure chamber 101, and the test probe radial displacement control device and the infrared test pressure head are connected by bolts; the axial thrust mechanism 2 can apply axial force. The test chamber 102 adopts expansion material, which can transmit the liquid pressure of the pressure chamber 101 and generate axial pressure on the test chamber 102;

Step 2: Adjust the position of the infrared emitting probe and the receiving probe so that the infrared beam emitted by the infrared emitting probe can be close to the inner ring wall of the borehole rock without being blocked, and the infrared receiving probe can clearly receive the signal;

Step 3: Adjust the temperature test and control device, heat the liquid in the liquid storage tank to a predetermined temperature value, and record the radial position X1 displayed by the radial displacement control device of the test probe;

Step 4: Pressurize the wellbore rock, pump the liquid into the liquid guide plug 107 through the liquid inlet pump, increase the pressure in the pressure chamber 101 to a predetermined pressure, and wait until the temperature test probe in the cover body 203 reaches a stable temperature, record The radial position X2 displayed by the radial displacement control device of the test probe;

Step 5: Adjust the built-in heater 110 inside the pressure chamber 101 of the rock mechanics testing machine to heat the internal medium, so that the temperature in the test chamber 102 reaches the predetermined temperature T1. The diameter of the rock in the high borehole shrinks, the infrared receiving probe is blocked and there is no signal, and the radial displacement control device of the test probe in the upper and lower cavity sealing pressure heads undergoes automatic adjustment and synchronous adjustment, and moves toward the center of the borehole. Each movement displacement ΔS, the first After one movement, the infrared receiving probe receives the infrared signal, stops moving, and records the displacement S1=I·ΔS; continues heating, and also records the displacements S2, S3, ..., SN.

The test steps provided in this embodiment are as follows:

(1) The wellbore rock is made into an annular structure of the wellbore according to the test requirements, and put into the rock pressure chamber 101 .

(2) Adjust the heating furnace, heat the medium in the liquid outlet pipe to the set temperature, and open the confining pressure liquid inlet system.

(3) Adjust the position of the infrared probe on the radial displacement control device of the test probe through the data synchronous acquisition and processing system to ensure that the infrared rays are not blocked by the rock side wall and close to the rock side wall, and record the position of the probe.

(4) pressurize.

(5) Similarly, adjust the position of the infrared probe to ensure that the infrared rays are not blocked by the rock side wall and are close to the rock side wall, and record the position of the probe.

(6) Heating is carried out.

(7) Similarly, adjust the position of the infrared probe to ensure that the infrared rays are not blocked by the rock side wall and are close to the rock side wall, and record the position of the probe.

(8) After the experiment, drain the oil.

(9) Open the triaxial chamber, take the device out of the test bench, and drain the engineering liquid.

As shown in Fig. 8, the advantages of the present invention are: to make up for the inability of the existing rock mechanical property testing device to measure the influence of rock temperature on strength, to fill the gap in the borehole collapse pressure test of horizontal wells, and to innovate and develop a method for testing rocks at different temperatures. Collapse pressure testing device under changing conditions, testing the influence of temperature on the strength of high-pressure rocks, especially the impact on the collapse pressure of rocks around the wellbore of horizontal wells, and then predicting and evaluating the strength of the downhole wall. The wellbore stability prediction provides guidance basis. This technology can monitor the mechanical and displacement information in the rock uniaxial loading test, rock triaxial mechanical test, rock creep mechanical test, rock temperature stress loading test and other tests around the wellbore.

The present invention can be applicable to the synchronous monitoring of rock collapse pressure under the constant temperature state, simultaneously applicable to the synchronous measurement of the collapse pressure of the rock around the drilling borehole under different temperature and pressure environments, and applicable to different well types (vertical well, horizontal well, directional well) ) The simultaneous measurement of the collapse pressure of rocks around the wellbore under different temperature and pressure environments can solve the stability prediction of the drilling wellbore under high temperature and high pressure conditions.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. A horizontal well borehole collapse pressure testing device, comprising:

the pressure kettle comprises a pressure cavity extending along the horizontal direction and a test cavity extending along the horizontal direction, wherein the test cavity comprises a rigid barrel positioned in the pressure cavity and an elastic barrel positioned in the rigid barrel and capable of deforming along the radial direction, the pressure cavity is provided with a side wall, the side wall is provided with a liquid guide plug communicated with the pressure cavity, and the side wall is provided with a flow guide pipe in a penetrating way, and the flow guide pipe can discharge fluid in the elastic barrel;

the guide plug is arranged on the right side in the elastic barrel and used for accommodating rocks, and the guide plug is provided with a first light-transmitting part;

the axial thrust mechanism is positioned on the right side of the rock relative to the diversion plug, the axial thrust mechanism can move relative to the pressure kettle, one end of the axial thrust mechanism positioned in the pressure kettle is provided with a diversion mechanism capable of being jointed with the pressure cavity and the testing cavity, the diversion mechanism comprises a seepage channel capable of communicating the pressure cavity with the elastic barrel when the diversion mechanism is jointed with the pressure cavity and the testing cavity, and the diversion mechanism is provided with a second light transmission part;

the displacement control mechanism can transversely move relative to the rigid barrel, one end of the displacement control mechanism is positioned in the pressure cavity, and the other end of the displacement control mechanism is arranged on the elastic barrel;

the temperature control mechanism is used for controlling the temperature in the elastic barrel;

the infrared measurement mechanism comprises a first probe arranged on the right side of the first light transmission part and a second probe arranged on the left side of the second light transmission part and corresponding to the first probe in the transverse direction, and the first probe and the second probe can synchronously move in the horizontal direction;

the guide mechanism comprises a guide rail, a probe clamping mechanism and a motor, wherein the probe clamping mechanism is movably arranged on the guide rail along the extending direction of the guide rail, the motor is provided with an output shaft, the probe clamping mechanism is used for clamping a first probe or a second probe, and the output shaft of the motor is in transmission connection with the probe clamping mechanism.

2. The horizontal well borehole collapse pressure testing device according to claim 1, wherein the pressure kettle comprises an outer cover, the axial thrust mechanism comprises an axial loading device and a thrust rod which can be in transmission connection with the axial loading device and penetrates through the outer cover, one end of the thrust rod in the pressure kettle is fixedly provided with a sealing cover plate which is sealed with the outer cover, the flow guiding mechanism comprises a seepage plug which can be matched with the elastic barrel and is provided with a seepage channel, and a seepage joint which is arranged on the seepage plug, a flow guiding groove of the seepage joint is communicated with the seepage channel of the seepage plug, the seepage channel is communicated with an inner cavity of the elastic barrel, and the flow guiding groove is communicated with the pressure cavity.

3. The horizontal well bore collapse pressure testing device according to claim 2, wherein the seepage plug is provided with a protective cover on the side facing away from the rock, and the protective cover is arranged outside the first probe or the second probe.

4. The horizontal well bore collapse pressure testing device according to claim 1, wherein the temperature control mechanism comprises a heater extending leftwardly from the diverter plug.

5. The horizontal well bore collapse pressure testing device according to claim 1, wherein a sealed chamber is provided between the diverter plug and the sidewall, and the first probe or the second probe is disposed in the sealed chamber.

6. The horizontal well borehole collapse pressure testing device according to claim 2, wherein the seepage plug is connected with a seepage interface, the seepage interface is fixed on the sealing cover plate, a plurality of diversion trenches distributed along the circumferential direction are arranged on one side of the seepage interface, facing towards the rock, of the seepage interface, and each diversion trench is communicated with a seepage channel.

7. The horizontal well bore collapse pressure testing device according to claim 1, comprising a control unit for controlling the axial thrust mechanism, the displacement control mechanism, the temperature control mechanism, the infrared measurement mechanism.

8. The horizontal well bore collapse pressure testing device according to claim 2, wherein the second light transmitting portion is located radially between the seepage plug and the seepage joint.

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