A drilling-while-drilling well wall strengthening device based on a self-propelled and self-directed directional drilling system

Abstract

This invention discloses a wellbore reinforcement device based on a self-propelled, self-directional steerable drilling system. It achieves controllable wellbore reinforcement by separating the mud and reaction fluid through a reaction fluid delivery mechanism; it achieves comprehensive wellbore coverage through the independent operation of multiple reaction chambers; it solves the problem of mud-mixture separation during stabilization by tightly integrating the mud isolation mechanism with the wellbore through a pushing mechanism; it addresses the issue of excess mixture handling through an air chamber and a one-way valve; and it completely eliminates the problem of device hovering by connecting the device to a torque self-balancing drilling system. This invention, while solving the problem of wellbore reinforcement during drilling, can both specifically reinforce damaged wellbores and recycle mud. Compared with traditional methods, it provides a more efficient, intelligent, and environmentally friendly wellbore reinforcement method and equipment for torque self-balancing drilling systems.

Description

Technical Field

[0001] This invention relates to the fields of drilling, drilling engineering and wellbore protection technology, and in particular to a wellbore reinforcement device based on a self-propelled and self-directional directional drilling system. Background Technology

[0002] During drilling, unstable wellbore, including rockfalls and collapses, often leads to complexities or accidents within the well, causing numerous problems and increasing drilling costs. For formations with good wellbore stability, mud is typically used to protect the wellbore, also known as mud wall protection. However, for wellbore with poor stability where mud cannot guarantee stability, casing cementing is the only option to seal the wellbore before drilling continues. Currently, drilling cementing technology is quite mature and sophisticated.

[0003] The inventor proposed a "self-propelled and self-directional directional drilling system," patent number: CN202022054651.2, which has three main advantages: First, it eliminates the need for a drilling rig. The bottom-hole driven dual drill bit replaces the rig's rotary drive, the drilling mud circulation replaces the surface mud pump circulation, and the near-bit pressure adjustment system replaces the rig's hook control of the drilling pressure. Second, it eliminates dependence on drill pipe depth. Using armored cable ducts as the primary transmission medium significantly reduces tripping time and minimizes disturbance to the wellbore by the drill string. Third, the drilling system is self-propelled and self-directional, eliminating the need for surface devices to pressurize and feed the drill bit.

[0004] However, similar to conventional drilling, wellbore stability must be considered after achieving the goal of rig-free and drill pipe-free directional drilling. First, it is necessary to identify areas of wellbore instability or instability. To address this, the inventors proposed a "self-contained, continuously recording device for formation rock morphology while drilling" (patent number: CN201921263123.9), which records wellbore morphology while drilling and identifies areas of wellbore instability or instability. Second, it is necessary to reinforce these identified areas of instability or instability, but currently there are no relevant solutions or reports, representing a gap in research. Therefore, researching wellbore reinforcement devices based on self-propelled, self-directional directional drilling systems is essential and of great significance. Summary of the Invention

[0005] The purpose of this invention is to provide a wellbore reinforcement device based on a self-propelled and self-directional steerable drilling system, to fill the gap in wellbore reinforcement after the self-propelled and self-directional steerable drilling system has achieved continuous recording of formation rock morphology during drilling. This allows the self-propelled and self-directional steerable drilling system to both detect wellbore morphology during drilling and reinforce unstable wellbore areas detected during drilling.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a wellbore reinforcement device based on a self-propelled and self-directional directional drilling system, comprising: a mud recovery mechanism for recovering mud and transporting it to a reaction chamber mechanism;

[0008] The reaction liquid delivery mechanism is used to deliver the reaction liquid to the reaction chamber mechanism;

[0009] The reaction chamber mechanism is used to mix mud and reaction fluid, and to evenly apply the mixture to the well wall using a brush.

[0010] The airbag chamber mechanism is used to deliver gas to the reaction chamber mechanism to promote thorough mixing of mud and reaction liquid or to push the mixture.

[0011] The mud isolation mechanism makes close contact with the well wall through a rubber contact ring;

[0012] The propulsion mechanism is used to push out the mud isolation mechanism and the reaction chamber mechanism, and to press the mud isolation mechanism against the wellbore surface;

[0013] A connecting mechanism for connecting a torque self-balancing drilling system;

[0014] A barrier mechanism, acting as a protective casing, is used to prevent external substances from entering the device.

[0015] There are N reaction chamber mechanisms, where N equals 4. Each reaction chamber mechanism operates independently and is connected to one reaction liquid delivery mechanism, one mud isolation mechanism, and two propulsion mechanisms.

[0016] Furthermore, the mud recovery mechanism includes recovery pipes, mud conveying pipes, and valves. The recovery pipes are located at the center of the device. There are four mud conveying pipes, arranged in two layers, with pipes in the same layer arranged symmetrically and pipes in different layers at an angle of 90°.

[0017] Furthermore, the mud conveying pipeline includes an upper pipeline and a lower pipeline. The upper pipeline is fixedly connected to the recovery pipeline, and the upper pipeline and the lower pipeline are connected by a valve.

[0018] Furthermore, the reaction liquid delivery mechanism includes a ground delivery pipeline and an injection pipeline. The ground delivery pipeline is connected to a ground reaction liquid storage tank, and the injection pipeline is fixedly connected to the reaction chamber mechanism.

[0019] Furthermore, the reaction chamber mechanism includes an air inlet, a mud inlet, a reaction liquid inlet, a stepper motor, a mixing device, a torsion motor, a threaded rod, a brush, the reaction chamber body, a distance sensor, and a baffle.

[0020] Furthermore, there are two gas inlets, symmetrically distributed on both sides of the reaction chamber body, which are fixedly connected to the gas pipeline. The mud inlet is fixedly connected to the lower pipe of the mud conveying pipeline, and the reaction liquid inlet is fixedly connected to the injection pipe of the reaction liquid conveying mechanism.

[0021] Furthermore, the stepper motor includes a stepper motor body, a central shaft, and screws. The stepper motor body is fixed to the reaction chamber body by screws and connected to the mixing device through the central shaft.

[0022] Furthermore, there are two torsion motors, which are fixed inside the isolation mechanism and fixedly connected to the threaded rods. There are two threaded rods, which are symmetrically distributed on both sides of the reaction chamber body and connected to the brushes through threaded holes.

[0023] The brush includes threaded holes and sensor holes. There are two threaded holes, symmetrically distributed on both sides of the brush. There are two distance sensors, symmetrically arranged vertically. They are fixedly connected to the brush through the sensor holes. The baffle is slidably connected to the slide groove of the reaction chamber body.

[0024] Furthermore, the airbag chamber mechanism includes an outer wall of the airbag chamber, gas pipes, supporting columns, airbags, and reaction liquid delivery ports. The outer wall of the airbag chamber is fixedly connected to the upper and lower platforms. There are eight gas pipes, symmetrically distributed in two layers. The gas pipes are fixedly connected to the airbags and connected to the gas inlets and reaction chamber mechanism through air holes. There are two supporting columns, symmetrically distributed, fixedly connected to the upper and lower platforms of the airbags and blocking mechanism. There are two reaction liquid delivery ports, also symmetrically distributed.

[0025] Furthermore, the mud isolation mechanism includes an isolation body, rubber contact rings, and a one-way valve. The isolation body is fixedly connected to the reaction chamber body, and the rubber contact rings are distributed at the front end of the isolation body and contact the well wall during operation.

[0026] The check valve includes a check valve housing, a stop, and a spring. The check valve housing is fixed inside the isolation body, and the stop points to the upper surface of the isolation body. There are four check valves, which are evenly distributed on the lower surface of the isolation body.

[0027] Furthermore, the propulsion mechanism includes a push rod, a base, a receiver, an antenna, a motor, a screw, and bolts. The push rod is fixedly connected to the reaction chamber body and connected to the motor via the screw, allowing for horizontal movement. The base is fixedly connected to the platform, and the receiver is fixedly connected to the antenna and motor, forming a control network with the ground control room. The motor is fixedly connected to the base via four bolts.

[0028] Furthermore, the connecting mechanism includes male and female connectors, with five male and five female connectors, which are fixed inside the top and bottom of the blocking mechanism, respectively.

[0029] Furthermore, the blocking mechanism includes a thin-walled isolation structure, connecting holes, thick-walled structures, mud pipe holes, air holes, reaction liquid pipe holes, a platform, a top seal, and a bottom seal. The thin-walled isolation structure is concentric with the recovery pipe, and its radius is much larger than that of the recovery pipe. There are four thick-walled structures. The thick-walled structures, platform, top seal, and bottom seal are fixedly connected.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] The wellbore reinforcement device based on a torque self-balancing drilling system proposed in this invention separates the mud and reaction fluid through a reaction fluid delivery mechanism, enabling controllable wellbore reinforcement at any time. Multiple reaction chambers operate independently, achieving comprehensive wellbore coverage. A pushing mechanism tightly integrates the mud isolation mechanism with the wellbore, solving the problem of mud-mixture separation during stabilization operations. An air chamber and a one-way valve address the handling of excess mixture. A connecting mechanism connects the device to the torque self-balancing drilling system, completely eliminating the problem of device hovering. This wellbore reinforcement device based on a torque self-balancing drilling system, while solving the problem of wellbore reinforcement during drilling, can both specifically reinforce damaged wellbores and recycle mud. Compared with traditional methods, it provides a more efficient, intelligent, and environmentally friendly wellbore reinforcement method and equipment for torque self-balancing drilling systems. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0033] Figure 1 This is a three-dimensional schematic diagram of a wellbore reinforcement device based on a self-propelled and self-directional directional drilling system in an embodiment of the present invention.

[0034] Figure 2 This is a front view of the wellbore reinforcement device based on the self-propelled and self-directional directional drilling system in an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the internal structure of the wellbore reinforcement device based on the self-propelled and self-directional directional drilling system in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the mud recycling mechanism in an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the structure of the mud conveying pipeline assembly in an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the reaction liquid delivery mechanism in an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the reaction chamber mechanism in an embodiment of the present invention.

[0040] Figure 8 This is a cross-sectional schematic diagram of the reaction chamber mechanism in an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the stepper motor in an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the brush structure in an embodiment of the present invention.

[0043] Figure 11 This is a front view of the airbag chamber mechanism in an embodiment of the present invention.

[0044] Figure 12 This is a top view of the airbag chamber mechanism in an embodiment of the present invention.

[0045] Figure 13 This is a schematic diagram of the mud isolation mechanism in an embodiment of the present invention.

[0046] Figure 14 This is a cross-sectional schematic diagram of the one-way valve in an embodiment of the present invention.

[0047] Figure 15 This is a schematic diagram of the pushing mechanism in an embodiment of the present invention.

[0048] Figure 16 This is a schematic diagram of the structure of the driving mechanism in an embodiment of the present invention. Figure 2 .

[0049] Figure 17 This is a schematic diagram of the male connector of the connecting mechanism in an embodiment of the present invention.

[0050] Figure 18 This is a schematic diagram of the structure of the female head of the connecting mechanism in an embodiment of the present invention.

[0051] Figure 19 This is a schematic diagram of the blocking mechanism in an embodiment of the present invention.

[0052] Figure 20 This is a schematic diagram showing the connection of the baffle, conveyor belt, pulley, and tensioner. Detailed Implementation

[0053] To better understand this technical solution, the method of the present invention will be described in detail below with reference to the accompanying drawings.

[0054] Referring to the accompanying drawings, this invention proposes a wellbore reinforcement device based on a self-propelled, self-directional steerable drilling system, comprising a mud recovery mechanism 1, a reaction fluid delivery mechanism 2, a reaction chamber mechanism 3, an airbag chamber mechanism 4, a mud isolation mechanism 5, a propulsion mechanism 6, a connecting mechanism 7, and a blocking mechanism 8. Wherein:

[0055] The mud recovery mechanism 1 is used to recover and transport mud to the reaction chamber mechanism 3. It includes a recovery pipe 101, a mud conveying pipe 102 and a valve 103. The recovery pipe 101 is located at the center of the device. There are 4 mud conveying pipes 102, which are arranged in two layers. The pipes in the same layer are symmetrically arranged, and the included angle between the pipes in different layers is 90°.

[0056] Specifically, the mud conveying pipeline 102 includes an upper pipeline 10201 and a lower pipeline 10202. The upper pipeline 10201 is fixedly connected to the recovery pipeline 101, and the upper pipeline 10201 and the lower pipeline 10202 are connected by a valve 103.

[0057] The reaction liquid delivery mechanism 2 is used to deliver the reaction liquid to the reaction chamber mechanism 3. It includes a ground delivery pipe 201 and an injection pipe 202. The ground delivery pipe 201 is connected to the ground reaction liquid storage tank, and the injection pipe 202 is fixedly connected to the reaction chamber mechanism 3.

[0058] The reaction chamber mechanism 3 is used to mix mud and reaction liquid, and to evenly apply the mixture to the well wall by brush 308. It includes a gas inlet 301, a mud inlet 302, a reaction liquid inlet 303, a stepper motor 304, a mixing device 305, a torsion motor 306, a threaded rod 307, a brush 308, a reaction chamber body 309, a distance sensor 3010, and a baffle 3011.

[0059] Specifically, there are two gas inlets 301, which are symmetrically distributed on both sides of the reaction chamber body 309. The gas inlets 301 are fixedly connected to the gas pipeline 402, the mud inlet 302 is fixedly connected to the lower pipeline 10202, and the reaction liquid inlet 303 is fixedly connected to the injection pipeline 202.

[0060] The stepper motor 304 includes a stepper motor body 30401, a central shaft 30402, and screws 30403. The stepper motor body 30401 is fixed to the reaction chamber body 309 by the screws 30403 and is connected to the mixing device 305 by the central shaft 30402.

[0061] Two torsion motors 306 are fixed inside the isolation mechanism 5 and are fixedly connected to threaded rods 307. There are two threaded rods 307, which are symmetrically distributed on both sides of the reaction chamber body 309 and are connected to the brush 308 through threaded holes 30801.

[0062] The brush 308 includes two threaded holes 30801 and two sensor holes 30802. There are two threaded holes 30801, which are symmetrically distributed on both sides of the brush 308. There are two distance sensors 3010, which are symmetrically arranged vertically. They are fixedly connected to the brush 308 through the sensor holes 30802. The baffle 3011 is slidably connected to the slide groove of the reaction chamber body 309. Specifically, a rack is fixedly connected to the baffle 3011. The drive motor is fixedly connected to the reaction chamber body 309, and the gear at the output end of the drive motor meshes with the rack. The drive motor drives the gear to rotate, thereby moving the rack and thus sliding the baffle 3011.

[0063] The method of moving the baffle 1011 can also be found in [reference]. Figure 20 That is, the baffle 1011 is fixedly connected to the conveyor belt 301102, the pulley 301104 is rotatably installed inside the reaction chamber body 309 and the conveyor belt 301102 is sleeved on the outside of the pulley 301104, the rotation of the pulley 301104 is driven by the drive motor, and the tension wheel 301103 is set on the side edge of the conveyor belt 301102 to adjust the tension of the conveyor belt 301102.

[0064] The airbag chamber mechanism 4 is used to supply gas to the reaction chamber mechanism 3 to promote the full mixing of mud and reaction liquid or to push the mixture. It includes an outer wall 401 of the airbag chamber, gas pipes 402, support columns 403, airbags 404 and reaction liquid delivery ports 405. The outer wall 401 of the airbag chamber is fixedly connected to the upper and lower platforms 807. There are 8 gas pipes 402, which are symmetrically distributed in two layers. The gas pipes 402 are fixedly connected to the airbags 404 and connected to the gas inlet 301 and the reaction chamber mechanism 3 through the air holes 805. There are 2 support columns 403, which are symmetrically distributed and fixedly connected to the airbags 404 and the upper and lower platforms 807. There are 2 reaction liquid delivery ports 405, which are symmetrically distributed.

[0065] The mud isolation mechanism 5 is in close contact with the well wall through the rubber contact ring 502. It includes an isolation body 501, a rubber contact ring 502 and a one-way valve 503. The isolation body 501 is fixedly connected to the reaction chamber body 309. The rubber contact ring 502 is distributed at the front end of the isolation body 501 and contacts the well wall during operation.

[0066] Specifically, the one-way valve 503 includes a one-way valve housing 50301, a stop 50302, and a spring 50303. The one-way valve housing 50301 is fixed inside the isolation body 501, the stop 50302 points to the upper surface of the isolation body 501, and the spring 50303 is disposed between the stop 50302 and the isolation body 501.

[0067] There are four one-way valves 503, which are evenly distributed on the lower surface of the isolation body 501.

[0068] The pushing mechanism 6 is used to push out the mud isolation mechanism 5 and the reaction chamber mechanism 3, and press the mud isolation mechanism 5 against the well wall surface. It includes a push rod 601, a base 602, a receiver 603, an antenna 604, a motor 605, a screw 606 and a bolt 607. The push rod 601 is fixedly connected to the reaction chamber body 309. The push rod 601 is connected to the motor 605 through the screw 606. The push rod 601 can move horizontally.

[0069] Specifically, the base 602 is fixedly connected to the platform 807, the receiver 603 is fixedly connected to the antenna 604 and the motor 605, forming a control network with the ground control room, and the motor 605 is fixedly connected to the base 602 by four bolts 607.

[0070] The connecting mechanism 7 is used to connect the torque self-balancing drilling system. It includes a male head 701 and a female head 702, with five male heads 701 and five female heads 702, which are fixed inside the top cap 808 and the bottom cap 809 respectively.

[0071] The blocking mechanism 8, which serves as a protective outer shell to prevent external substances from entering the device, includes an isolation thin wall 801, a connecting hole 802, a thick wall 803, a mud pipe hole 804, a vent 805, a reaction liquid pipe hole 806, a platform 807, a top cap 808, and a bottom cap 809. The isolation thin wall 801 is concentric with the recovery pipe 101, and its radius is much larger than that of the recovery pipe 101. There are four thick walls 803. The thick walls 803, the platform 807, the top cap 808, and the bottom cap 809 are fixedly connected.

[0072] Furthermore, there are four reaction liquid delivery mechanisms 2, distributed at 90° intervals around the recovery pipe 101; four reaction chamber mechanisms 3, symmetrically distributed in two layers; four mud isolation mechanisms 5, symmetrically distributed in two layers; and eight propulsion mechanisms 6, with each pair of propulsion mechanisms 6 connected to one reaction chamber mechanism 3.

[0073] Working principle and usage of this invention:

[0074] After receiving the signal, the mud recovery device 1 opens the valve 103, and the mud enters the reaction chamber mechanism 3 through the mud conveying pipe 102. The reaction liquid is injected into the reaction chamber 3 from the ground storage tank through the reaction liquid conveying mechanism 2. The stepper motor 304 drives the mixing device 305 to mix the mud and the reaction liquid. The air chamber mechanism 4 delivers a small amount of gas to the reaction chamber mechanism 3 through the gas pipe 402 to promote the full mixing of the mud and the reaction liquid and form a preliminary mixture.

[0075] Upon reaching the damaged rock layer, the device hovers with the help of the continuous recording device for the formation rock morphology while drilling in the torque self-balancing drilling system. The antenna 604 of the push mechanism 6 receives the signal from the control room, and the motor 605 drives the push rod 601 to push out the mud isolation mechanism 5 and the reaction chamber mechanism 3, pressing the mud isolation mechanism 5 against the surface of the well wall. The baffle 3011 opens, and the airbag chamber mechanism 4 delivers a large amount of gas to the reaction chamber mechanism 3. The mixture is sprayed from the reaction chamber body 309 to the well wall. With the help of air pressure, the mixture is pushed to the surface of the damaged rock layer. At this time, the pressure inside the airbag chamber mechanism 4 cannot compress the spring 50303, and the one-way valve 503 is in the closed state. The torsion motor 306 drives the threaded rod 307 to rotate, so that the brush 308 moves vertically. After the distance sensor 3010 contacts the mud isolation mechanism 5, the torsion motor 306 rotates in the opposite direction, so that the brush 308 moves vertically repeatedly, and the mixture is evenly coated on the well wall.

[0076] After the protective layer is fixed, the mud recovery device 1 and the reaction liquid delivery mechanism 2 stop working, and the airbag chamber mechanism 4 continues to deliver gas to the reaction chamber mechanism 3. At this time, the gas pressure delivered is greater than the gas pressure during spraying, the spring 50303 contracts, and the one-way valve 503 is in the open state. The excess mixture is discharged through the one-way valve 503. After discharge, the push mechanism 6 retracts the push rod 601 and brings back the mud isolation mechanism 5 and the reaction chamber mechanism 3.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wellbore reinforcement device based on a self-propelled, self-directional drilling system, characterized in that, include: A mud recovery mechanism (1) is used to recover mud and transport it to the reaction chamber mechanism (3). The reaction liquid delivery mechanism (2) is used to deliver the reaction liquid to the reaction chamber mechanism (3). The reaction chamber mechanism (3) is used to mix the mud and the reaction liquid, and to apply the mixture evenly to the well wall by means of a brush (308); The airbag chamber mechanism (4) is used to deliver gas to the reaction chamber mechanism (3) to promote the full mixing of mud and reaction liquid or to push the mixture. The mud isolation mechanism (5) is in close contact with the well wall through a rubber contact ring (502); The pushing mechanism (6) is used to push out the mud isolation mechanism (5) and the reaction chamber mechanism (3) and press the mud isolation mechanism (5) against the well wall surface; Connection mechanism (7) is used to connect the torque self-balancing drilling system; The blocking mechanism (8) serves as a protective outer shell to prevent external substances from entering the device. The number of reaction chamber mechanisms (3) is N, where N equals 4. Each reaction chamber mechanism (3) operates independently and is connected to one reaction liquid delivery mechanism (2), one mud isolation mechanism (5), and two propulsion mechanisms (6). The mud recovery mechanism (1) includes a recovery pipe (101), a mud conveying pipe (102) and a valve (103). The recovery pipe (101) is located at the center of the device. There are four mud conveying pipes (102), which are arranged in two layers. The pipes in the same layer are symmetrically arranged, and the angle between the pipes in different layers is 90°. The reaction chamber mechanism (3) includes an air inlet (301), a mud inlet (302), a reaction liquid inlet (303), a stepper motor (304), a mixing device (305), a torsion motor (306), a threaded rod (307), a hanging brush (308), a reaction chamber body (309), a distance sensor (3010), and a baffle (3011). There are two gas inlets (301), which are symmetrically distributed on both sides of the reaction chamber body (309) and are fixedly connected to the gas pipeline (402). The mud inlet (302) is fixedly connected to the lower pipe (10202) of the mud conveying pipeline (102). The reaction liquid inlet (303) is fixedly connected to the injection pipe (202) of the reaction liquid conveying mechanism (2). The stepper motor (304) includes a stepper motor body (30401), a central shaft (30402) and screws (30403). The stepper motor body (30401) is fixed to the reaction chamber body (309) by screws (30403) and connected to the mixing device (305) by the central shaft (30402). There are two torsion motors (306), which are fixed inside the isolation mechanism (5) and fixedly connected to the threaded rods (307); there are two threaded rods (307), which are symmetrically distributed on both sides of the reaction chamber body (309) and connected to the hanging brushes (308) through threaded holes (30801); The brush (308) includes a threaded hole (30801) and a sensor hole (30802). There are two threaded holes (30801), which are symmetrically distributed on both sides of the brush (308). There are two distance sensors (3010), which are symmetrically arranged vertically and are fixedly connected to the brush (308) through the sensor hole (30802). The baffle (3011) is slidably connected in the groove of the reaction chamber body (309).

2. The wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The mud conveying pipeline (102) includes an upper pipeline (10201) and a lower pipeline (10202). The upper pipeline (10201) is fixedly connected to the recovery pipeline (101), and the upper pipeline (10201) and the lower pipeline (10202) are connected by a valve (103).

3. The wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The reaction liquid delivery mechanism (2) includes a ground delivery pipe (201) and an injection pipe (202). The ground delivery pipe (201) is connected to the ground reaction liquid storage tank, and the injection pipe is fixedly connected to the reaction chamber mechanism (3).

4. The wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The mud isolation mechanism (5) includes an isolation body (501), a rubber contact ring (502), and a one-way valve (503). The isolation body (501) is fixedly connected to the reaction chamber body (309). The rubber contact ring (502) is distributed at the front end of the isolation body (501) and contacts the well wall during operation. The one-way valve (503) includes a one-way valve housing (50301), a stop (50302), and a spring (50303). The one-way valve housing (50301) is fixed inside the isolation body (501), and the stop (50302) points to the upper surface of the isolation body (501). There are 4 one-way valves (503) evenly distributed on the lower surface of the isolation body (501).

5. A wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The propulsion mechanism (6) includes a push rod (601), a base (602), a receiver (603), an antenna (604), a motor (605), a screw (606), and bolts (607). The push rod (601) is fixedly connected to the reaction chamber body (309) and connected to the motor (605) through the screw (606), and can move horizontally. The base (602) is fixedly connected to the platform (807). The receiver (603) is fixedly connected to the antenna (604) and the motor (605), forming a control network with the ground control room. The motor (605) is fixedly connected to the base (602) through four bolts (607).

6. The wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The connecting mechanism (7) includes a male head (701) and a female head (702), with five male heads (701) and five female heads (702), which are fixed inside the top (808) and bottom (809) of the blocking mechanism (8).

7. A wellbore reinforcement device based on a self-propelled, self-directional drilling system according to claim 1, characterized in that, The blocking mechanism (8) includes a thin isolation wall (801), a connecting hole (802), a thick wall (803), a mud pipe hole (804), a vent (805), a reaction liquid pipe hole (806), a platform (807), a cap (808), and a bottom cap (809). The thin isolation wall (801) is concentric with the recovery pipe (101), and its radius is much larger than that of the recovery pipe (101). There are four thick walls (803). The thick walls (803), platform (807), cap (808), and bottom cap (809) are fixedly connected.

Images