A sealing structure and sealing method for pressurized water drilling

Abstract

The present invention discloses a sealing hole structure and a sealing hole method for pressurized water drilling, and relates to the technical field of pressurized water drilling, including a wellbore and a grouting assembly, wherein a wellbore pipe is inserted into the wellbore, the grouting assembly is arranged on the top of the wellbore pipe, and the side of the first winding drum is connected to a first servo motor. In the sealing hole structure and the sealing hole method for pressurized water drilling, cement slurry enters into the rubber bellows along the grouting pipe, and the first servo motor drives the first winding drum to rotate and wind up the first steel wire rope, so that the rubber bellows gradually shrinks and rises, so that the cement slurry is injected into the wellbore pipe from bottom to top, and the slurry surface height of the cement slurry is determined by the pressure sensing end during the injection process, so as to control the rising speed of the rubber bellows in real time, thereby there is no need to assemble multiple sections of drill rods to inject cement slurry, and there is no need to frequently disassemble redundant drill rods as the slurry surface rises, which is conducive to greatly improving the grouting efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pressurized water drilling, in particular to a sealing structure and a sealing method for pressurized water drilling. Background Art

[0002] Since pressurized water is prone to rise and flow by gravity during the drilling process, as the amount of pressurized water increases, sand and sedimentation in the borehole become serious, making it impossible to continue construction, resulting in the scrapping of the drilling. After the drilling is scrapped, in order to prevent the pressurized water from retaining by gravity, the well needs to be sealed. When sealing the well, mud needs to be injected into the wellbore, and the mud is sealed after solidification.

[0003] The existing method of sealing pressurized water drilling is to insert a wellbore pipe into the wellbore, then insert a drill pipe into the wellbore pipe, and inject mud into the wellbore pipe from the bottom to the top through the drill pipe. As a result, the drill pipe needs to be gradually raised, and the drilling depth is often tens of meters deep. The drill pipe is assembled in multiple sections, so the drill pipe needs to be disassembled every time a section is withdrawn, resulting in grouting needing to be carried out in batches, resulting in low grouting efficiency.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a sealing structure and a sealing method for pressurized water drilling are provided. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a sealing structure for pressurized water drilling and a sealing method thereof, which solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sealing structure for pressurized water drilling, comprising a wellbore and a grouting assembly, a wellbore pipe is inserted into the wellbore, and a valve is fixed to the top of the side of the wellbore pipe, the grouting assembly is arranged on the top of the wellbore pipe, the grouting assembly comprises a receiving pipe, a support frame, a first winding drum, a first servo motor, a first steel wire rope, a rubber bellows and a grouting pipe, a support frame is fixed to the top of the receiving pipe, and a first winding drum is arranged on both sides of the upper surface of the support frame, the side of the first winding drum is connected to the first servo motor, and the surface of the first winding drum is wound with a first steel wire rope, the end of the first steel wire rope away from the first winding drum passes through the support frame, the receiving pipe and is connected to the rubber bellows, and the top of the support frame is connected to the grouting pipe.

[0007] Furthermore, the grouting pipe is connected to the rubber bellows, and the top of the rubber bellows is fixedly connected to the top of the inner wall of the receiving pipe.

[0008] Furthermore, a control valve is connected to the bottom of the rubber bellows, and a pressure sensing terminal is provided on one side of the control valve.

[0009] Furthermore, a vertical groove is provided inside the well wall pipe, and a detection hole is provided on the inner surface of the well wall pipe.

[0010] Furthermore, the detection holes are equidistantly distributed on the inner surface of the well wall pipe.

[0011] Furthermore, the detection hole is communicated with the vertical groove, and a detection film is arranged inside the detection hole.

[0012] Furthermore, an electric pulley is arranged inside the vertical groove, and a pressure sensor is arranged on the side of the electric pulley facing the detection film.

[0013] Furthermore, a second winding drum is arranged on both sides of the outside of the top end of the well wall pipe, and a second servo motor is connected to one side of the second winding drum.

[0014] Furthermore, a second steel wire rope is wound around the surface of the second winding drum, and an electric pulley is fixed to one end of the second steel wire rope away from the second winding drum.

[0015] A sealing method for a sealing structure of a pressurized water drilling well, the sealing method comprising the following steps:

[0016] Step 1: The well wall pipe is inserted into the wellbore and fixed, and the top of the well wall pipe is one meter above the ground, and the valve is opened to allow the pressurized water to flow by itself;

[0017] Step 2: Calculate the volume of the hole according to the borehole diameter and depth, and prepare sufficient cement slurry. The cement slurry is injected into the grouting pipe through a slurry pump, and the cement slurry enters the rubber bellows along the grouting pipe;

[0018] Step 3: The control valve at the bottom of the rubber bellows is closed, and the first servo motor drives the first winding drum to rotate, so that the first steel wire rope is released, so that the rubber bellows sinks to the bottom of the well wall pipe due to gravity;

[0019] Step 4: When the rubber bellows reaches the bottom of the wellbore pipe, the control valve is opened to allow the cement slurry to be discharged to the bottom of the wellbore pipe. During the grouting process, the self-flow of pressurized water at the valve is observed in real time;

[0020] Step 5: The first servo motor drives the first winding drum to rotate and wind up the first steel wire rope, so that the rubber bellows gradually shrinks and rises, so that the cement slurry can be injected into the well wall pipe from bottom to top. During the injection process, the height of the cement slurry surface is determined by the pressure sensing end, so as to control the rising speed of the rubber bellows in real time;

[0021] Step 6: When the cement slurry injection height reaches the top plate of the pressurized water, the self-flow of the pressurized water at the valve will be significantly reduced. At this time, close the valve. If diluted cement slurry is found to flow out later, close the valve further until the valve discharges cement slurry with the same specific gravity as the injected cement slurry. At this time, stop grouting;

[0022] Step 7: During the grouting process from bottom to top, the pressure sensing end pays attention to the height of the cement slurry surface in real time. When the height of the cement slurry surface is above a detection hole, the second servo motor drives the second winding drum to rotate and the second steel wire rope is contracted, so that the electric pulley carrying the pressure sensor moves from bottom to top to the height of the detection hole. Under the pressure of the cement slurry, the detection film inside the detection hole is stressed and attached to the detection surface of the pressure sensor, thereby detecting whether the cement slurry is fully grouted;

[0023] Step 8: Use a fixed frequency vibration rubber hammer to knock the well pipe at the top outer wall of the well pipe, so that the inner wall of the well pipe transmits the vibration so that the cement slurry can be fully precipitated, thereby improving the pass rate of the pressure sensor during detection;

[0024] Step 9: After the grouting is stopped, the striking of the vibrating rubber hammer does not stop, and the pressure sensing end is used to pay attention to the cement slurry surface height in real time. If the slurry surface height sinks, it is necessary to re-inject cement slurry into the well wall pipe to the original height in time.

[0025] The present invention provides a sealing structure for pressurized water drilling and a sealing method thereof, which have the following beneficial effects:

[0026] 1. The sealing structure and sealing method of the pressurized water drilling well, cement slurry is injected into the grouting pipe through a mud pump, and the cement slurry enters the rubber bellows along the grouting pipe, and the first servo motor drives the first winding drum to rotate to wind up the first steel wire rope, so that the rubber bellows gradually shrinks and rises, so that the cement slurry can be injected into the well wall pipe from bottom to top, and the slurry surface height of the cement slurry is determined by the pressure sensing end during the injection process, so as to control the rising speed of the rubber bellows in real time, thereby eliminating the need to assemble multiple drill rods to inject cement slurry, and eliminating the need to frequently disassemble redundant drill rods as the slurry surface rises, which is beneficial to greatly improve the grouting efficiency.

[0027] 2. The sealing structure and sealing method of the pressurized water drilling well, in the process of gradual grouting from bottom to top, the pressure sensing end contacts the slurry surface and is triggered. If the pressure sensing end is not triggered, it means that the height of the cement slurry surface has not risen to the height of the pressure sensing end, so as to pay attention to the height of the cement slurry surface in real time. When the height of the slurry surface exceeds a detection hole, the second servo motor drives the second winding drum to rotate to shrink the second wire rope, so that the electric pulley carries the pressure sensor and moves from bottom to top to the height of the detection hole. Under the pressure of the cement slurry, the detection film inside the detection hole is subjected to force and adheres to the detection surface of the pressure sensor. The pressure sensor is helpful in judging whether the cement slurry is fully injected according to the pressure value detected by it.

[0028] 3. The sealing structure and sealing method of the pressurized water drilling well use a fixed-frequency vibration rubber hammer to knock the well pipe on the top outer wall of the well pipe, so that the inner wall of the well pipe transmits the vibration so that the cement slurry can be fully precipitated, thereby improving the pass rate of the pressure sensor during detection.

[0029] 4. The sealing structure and sealing method of the pressurized water drilling well are as follows: after the grouting is stopped, the striking of the vibrating rubber hammer does not stop, and the pressure sensing end is used to pay attention to the height of the cement slurry surface in real time. If the height of the cement slurry surface sinks, it is necessary to re-inject cement slurry into the well wall pipe to the original height in time, which is conducive to avoiding the situation where the cement slurry surface height is insufficient due to sinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall front view structure of a sealing structure for pressurized water drilling according to the present invention;

[0031] Figure 2 A schematic diagram of the internal structure of a receiving tube of a sealing structure for pressurized water drilling according to the present invention;

[0032] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a rubber bellows of a sealing structure for pressurized water drilling according to the present invention;

[0033] Figure 4 A schematic diagram of the internal structure of a vertical groove of a sealing structure for pressurized water drilling according to the present invention;

[0034] Figure 5 The invention provides a sealing structure for pressurized water drilling. Figure 4 Enlarged structural diagram at A in the middle.

[0035] In the figure: 1, wellbore; 2, wellbore wall pipe; 3, valve; 4, grouting assembly; 401, receiving pipe; 402, support frame; 403, first winding drum; 404, first servo motor; 405, first steel wire rope; 406, rubber bellows; 407, grouting pipe; 5, vertical groove; 6, detection hole; 7, detection film; 8, electric pulley; 9, pressure sensor; 10, second winding drum; 11, second servo motor; 12, second steel wire rope. DETAILED DESCRIPTION

[0036] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] like Figure 1-Figure 3 As shown, the present invention provides a technical solution: a sealing structure for pressurized water drilling, comprising a wellbore 1 and a grouting assembly 4, a wellbore pipe 2 is inserted into the wellbore 1, and a valve 3 is fixed to the top of the side of the wellbore pipe 2, the grouting assembly 4 is arranged on the top of the wellbore pipe 2, the grouting assembly 4 comprises a receiving pipe 401, a support frame 402, a first winding drum 403, a first servo motor 404, a first steel wire rope 405, a rubber bellows 406 and a grouting pipe 407, the top of the receiving pipe 401 is fixed with a support frame 402, and the first winding drum 403 is arranged on both sides of the upper surface of the support frame 402, and the side of the first winding drum 403 is connected to the first servo motor 404, and the first servo motor 404 is connected to the first servo motor 404, and the first servo motor 404 is connected to the first servo motor 404. A first servo motor 404 is connected, and a first steel wire rope 405 is wound on the surface of the first winding drum 403. One end of the first steel wire rope 405 away from the first winding drum 403 passes through the support frame 402 and the receiving tube 401, and is connected to a rubber bellows 406. A grouting pipe 407 is connected to the top of the support frame 402. The grouting pipe 407 is connected to the rubber bellows 406, and the top of the rubber bellows 406 is fixedly connected to the top of the inner wall of the receiving tube 401. A control valve is connected to the bottom of the rubber bellows 406, and a pressure sensing terminal is provided on one side of the control valve. The detection holes 6 are equidistantly distributed on the inner surface of the well wall pipe 2.

[0038] The specific operation is as follows: the well wall pipe 2 is inserted into the wellbore 1 for fixing, and the top of the well wall pipe 2 is one meter above the ground, and the valve 3 is opened to allow the pressurized water to flow by itself, and the volume of the hole is calculated according to the aperture and depth of the wellbore 1, and sufficient cement slurry is prepared, and the cement slurry is injected into the grouting pipe 407 through the grouting pipe 407. The cement slurry enters the rubber bellows 406 along the grouting pipe 407. At this time, the control valve at the bottom of the rubber bellows 406 is closed, and the first servo motor 404 drives the first winding The drum 403 rotates to release the first steel wire rope 405, so that the rubber bellows 406 sinks to the bottom of the well wall pipe 2 due to gravity. Then, when the rubber bellows 406 reaches the bottom of the well wall pipe 2, the control valve is opened to discharge the cement slurry to the bottom of the well wall pipe 2. During the grouting process, the self-flow of the pressurized water at the valve 3 is observed in real time. During the grouting, the first servo motor 404 drives the first winding drum 403 to rotate to reel in the first steel wire rope 405, so that the rubber bellows 406 is gradually When the pressure sensor 406 is in the process of being injected, the pressure of the rubber bellows 406 is used to determine the height of the cement slurry surface. When the height of the cement slurry injection reaches the top plate of the pressurized water, the self-flow of the pressurized water at the valve 3 will be significantly reduced. At this time, the valve 3 is closed, and when diluted cement slurry is found to flow out later, the valve 3 is further closed until the valve 3 discharges cement slurry with the same specific gravity as the injected cement slurry. At this time, the grouting is stopped. During the grouting, a vibrating rubber hammer with a fixed frequency is used to knock the well wall pipe 2 on the outer wall of the top of the well wall pipe 2, so that the inner wall of the well wall pipe 2 transmits the vibration so that the cement slurry can be fully precipitated. After the grouting is stopped, the knocking of the vibrating rubber hammer does not stop but continues for a period of time before stopping. The pressure sensor end is used to pay attention to the height of the cement slurry surface in real time. If the height of the slurry surface sinks, it is necessary to re-inject cement slurry into the well wall pipe 2 to the original height in time.

[0039] like Figure 1 , Figure 4-Figure 5 As shown, a vertical groove 5 is provided inside the well wall pipe 2, and a detection hole 6 is provided on the inner surface of the well wall pipe 2, the detection hole 6 is connected with the vertical groove 5, and a detection film 7 is provided inside the detection hole 6, an electric pulley 8 is provided inside the vertical groove 5, and a pressure sensor 9 is provided on the side of the electric pulley 8 facing the detection film 7, a second winding drum 10 is provided on both sides of the top outer side of the well wall pipe 2, and a second servo motor 11 is connected to one side of the second winding drum 10, a second steel wire rope 12 is wound on the surface of the second winding drum 10, and an electric pulley 8 is fixed to the end of the second steel wire rope 12 away from the second winding drum 10;

[0040] The specific operation is as follows: during the gradual grouting process from bottom to top, the pressure sensing end pays attention to the height of the cement slurry surface in real time. When the height of the slurry surface is above a detection hole 6, the second servo motor 11 drives the second winding drum 10 to rotate and causes the second steel wire rope 12 to contract, so that the electric pulley 8 carries the pressure sensor 9 and moves from bottom to top to the height of the detection hole 6. Under the pressure of the cement slurry, the detection film 7 inside the detection hole 6 is subjected to force and adheres to the detection surface of the pressure sensor 9. The pressure sensor 9 is helpful in judging whether the cement slurry is fully injected according to the pressure value detected by it. In order to prevent the pressure sensor 9 from getting stuck during the up and down movement of the vertical groove 5, the second steel wire rope 12 is released during the descent of the pressure sensor 9, and the electric pulley 8 is energized to carry the pressure sensor 9 and move along the inside of the vertical groove 5, so as to move the pressure sensor 9 to the specified height.

[0041] like Figure 1-Figure 5 As shown, a sealing method for a sealing structure of a pressurized water drilling well, the sealing method comprises the following steps:

[0042] Step 1: insert the well wall pipe 2 into the wellbore 1 and fix it, and the top of the well wall pipe 2 is one meter above the ground, and open the valve 3 to allow the pressurized water to flow by itself;

[0043] Step 2: Calculate the volume of the hole according to the borehole diameter and depth of the wellbore 1, and prepare sufficient cement slurry, which is injected into the grouting pipe 407 through a slurry pump, and then enters the rubber bellows 406 along the grouting pipe 407;

[0044] Step 3: The control valve at the bottom of the rubber bellows 406 is closed, and the first servo motor 404 drives the first winding drum 403 to rotate, so that the first steel wire rope 405 is released, so that the rubber bellows 406 sinks to the bottom of the well wall pipe 2 due to the influence of gravity;

[0045] Step 4: When the rubber bellows 406 reaches the bottom of the well wall pipe 2, the control valve is opened to allow the cement slurry to be discharged to the bottom of the well wall pipe 2. During the grouting process, the self-flow of pressurized water at the valve 3 is observed in real time;

[0046] Step 5: The first servo motor 404 drives the first winding drum 403 to rotate and wind up the first steel wire rope 405, so that the rubber bellows 406 gradually shrinks and rises, so that the cement slurry can be injected into the well wall pipe 2 from bottom to top. During the injection process, the height of the cement slurry surface is determined by the pressure sensing end, so as to control the rising speed of the rubber bellows 406 in real time;

[0047] Step 6: When the cement slurry injection height reaches the top plate of the pressurized water, the self-flow of the pressurized water at valve 3 will be significantly reduced. At this time, close valve 3. If diluted cement slurry is found to flow out later, close valve 3 further until valve 3 discharges cement slurry with the same specific gravity as the injected cement slurry. At this time, stop grouting;

[0048] Step 7: During the grouting process from bottom to top, the pressure sensing end pays attention to the height of the cement slurry surface in real time. When the height of the cement slurry surface is below a detection hole 6, the second servo motor 11 drives the second winding drum 10 to rotate and the second steel wire rope 12 to contract, so that the electric pulley 8 carries the pressure sensor 9 and moves upward from bottom to top to the height of the detection hole 6. Under the pressure of the cement slurry, the detection film 7 inside the detection hole 6 is stressed and attached to the detection surface of the pressure sensor 9, thereby detecting whether the cement slurry is fully grouted;

[0049] Step 8: Use a vibrating rubber hammer with a fixed frequency to knock the well wall pipe 2 on the top outer wall of the well wall pipe 2, so that the inner wall of the well wall pipe 2 transmits the vibration so that the cement slurry can be fully precipitated, thereby improving the pass rate of the pressure sensor 9 during detection;

[0050] Step 9: After stopping the grouting, the striking of the vibrating rubber hammer does not stop, and the pressure sensing end is used to pay attention to the cement slurry surface height in real time. If the slurry surface height sinks, it is necessary to promptly re-inject cement slurry into the well wall pipe 2 to the original height.

[0051] In summary, if Figure 1-Figure 5 As shown, the sealing structure and sealing method of the pressurized water drilling well are used. First, due to the destruction of the formation structure around the drilling well, that is, the wellbore 1, the well position has been scrapped, that is, a drainage channel is formed above the pressure top plate, and normal drilling construction cannot be carried out. At this time, the well position needs to be sealed, and the well wall pipe 2 is inserted into the wellbore 1 for fixing, and the top of the well wall pipe 2 is one meter above the ground. The valve 3 is opened to allow the pressurized water to flow by itself, and the volume in the hole is calculated according to the aperture and depth of the wellbore 1, and sufficient cement slurry is prepared, and the cement slurry is injected into the grouting pipe 407 through a mud pump;

[0052] The cement slurry enters the rubber bellows 406 along the grouting pipe 407. At this time, the control valve at the bottom of the rubber bellows 406 is closed, and the first servo motor 404 drives the first winding drum 403 to rotate, so that the first steel wire rope 405 is released, so that the rubber bellows 406 sinks to the bottom of the well wall pipe 2 due to the influence of gravity. In view of the self-spraying phenomenon and the influence of buoyancy in the well, the top of the grouting pipe 407 can be connected to a booster device through a three-way valve, and compressed air is injected into the grouting pipe 407 through the booster device to extend the rubber bellows 406 to prevent the rubber bellows 406 from being unable to sink to the bottom of the well wall pipe 2 due to the influence of buoyancy. Then, when it is determined that the rubber bellows 406 reaches the bottom of the well wall pipe 2, the control valve is opened to discharge the cement slurry to the bottom of the well wall pipe 2. During the grouting process, the self-flow of pressurized water at the valve 3 is observed in real time.

[0053] During grouting, the first servo motor 404 drives the first winding drum 403 to rotate and reel in the first steel wire rope 405, so that the rubber bellows 406 gradually shrinks and rises, so that the cement slurry can be injected into the well wall pipe 2 from bottom to top. During the injection process, the slurry surface height of the cement slurry is determined by the pressure sensing end head. During the rising process of the slurry surface height of the cement slurry, the pressure sensing end head is triggered in real time. If the pressure sensing end head is not triggered, it means that the slurry surface height is not enough, and it is necessary to reduce the rising speed of the rubber bellows 406 until the slurry surface contacts the triggering pressure sensing end head again, so as to control the rising speed of the rubber bellows 406 in real time. When the cement slurry injection height reaches the top plate of the pressurized water, the self-flow of the pressurized water at the valve 3 will be significantly reduced. At this time, the valve 3 is closed, and when it is found that the diluted cement slurry flows out later, the valve 3 is further closed until the valve 3 discharges the cement slurry with the same specific gravity as the injected cement slurry, and the grouting is stopped at this time.

[0054] During the grouting process from bottom to top, the pressure sensing end pays attention to the height of the cement slurry surface in real time. If the pressure sensing end changes from the triggered state to the untriggered state, it means that the height of the cement slurry surface has sunk, and thus it is necessary to reduce the rising speed of the rubber bellows 406 until the slurry surface contacts the trigger pressure sensing end again. When the slurry surface height is below a detection hole 6, the second servo motor 11 drives the second winding drum 10 to rotate and the second steel wire rope 12 contracts, so that the electric pulley 8 carries the pressure sensor 9 and moves from bottom to top to the height of the detection hole 6. Under the pressure of the cement slurry, the detection film 7 inside the detection hole 6 is subjected to force and adheres to the detection surface of the pressure sensor 9. The pressure sensor 9 is helpful in judging whether the cement slurry is fully injected according to the pressure value detected by it. In order to prevent the pressure sensor 9 from getting stuck during the up and down movement of the vertical groove 5, the second steel wire rope 12 is released during the descent of the pressure sensor 9, and the electric pulley 8 is powered on to carry the pressure sensor 9 and move along the vertical groove 5, so as to move the pressure sensor 9 to the specified height.

[0055] During grouting, a vibrating rubber hammer with a fixed frequency is used to knock on the well wall pipe 2 at the top outer wall of the well wall pipe 2, so that the inner wall of the well wall pipe 2 transmits vibration so that the cement slurry can be fully precipitated. After the grouting is stopped, the knocking of the vibrating rubber hammer does not stop but continues for a period of time before stopping, and the pressure sensing end is used to pay attention to the height of the cement slurry surface in real time. If the slurry surface height sinks, it is necessary to promptly re-inject cement slurry into the well wall pipe 2 to the original height.

[0056] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A sealing structure for pressurized water drilling, comprising a wellbore (1) and a grouting assembly (4), characterized in that: A wellbore pipe (2) is inserted into the wellbore (1), and a valve (3) is fixed to the top of the side of the wellbore pipe (2). The grouting assembly (4) is arranged on the top of the wellbore pipe (2). The grouting assembly (4) comprises a receiving pipe (401), a support frame (402), a first winding drum (403), a first servo motor (404), a first steel wire rope (405), a rubber bellows (406) and a grouting pipe (407). The supporting frame (402) is fixed to the top of the receiving pipe (401), and the first winding drum (403) is arranged on both sides of the upper surface of the supporting frame (402). The side of the first winding drum (403) is connected to the first servo motor (404), and the surface of the first winding drum (403) is wound with a first steel wire rope (405). The first steel wire rope (405) is wound around the first steel wire rope (406). 5) One end away from the first winding drum (403) passes through the support frame (402) and the receiving tube (401) and is connected to a rubber bellows (406); the top of the support frame (402) is connected to a grouting tube (407); the grouting tube (407) is connected to the rubber bellows (406); the top of the rubber bellows (406) is fixedly connected to the top of the inner wall of the receiving tube (401); a vertical groove (5) is provided inside the well wall tube (2); a detection hole (6) is provided on the inner surface of the well wall tube (2); the detection hole (6) is connected to the vertical groove (5); a detection film (7) is provided inside the detection hole (6); an electric pulley (8) is provided inside the vertical groove (5); and a pressure sensor (9) is provided on the side of the electric pulley (8) facing the detection film (7).

2. The sealing structure for pressurized water drilling according to claim 1, characterized in that: The bottom of the rubber bellows (406) is connected to a control valve, and a pressure sensing terminal is provided on one side of the control valve.

3. The sealing structure for pressurized water drilling according to claim 2, characterized in that: The detection holes (6) are distributed at equal intervals on the inner surface of the well wall tube (2).

4. The sealing structure for pressurized water drilling according to claim 3, characterized in that: Second winding drums (10) are arranged on both sides of the outside of the top end of the well wall tube (2), and one side of the second winding drum (10) is connected to a second servo motor (11).

5. The sealing structure for pressurized water drilling according to claim 4, characterized in that: A second steel wire rope (12) is wound around the surface of the second winding drum (10), and an electric pulley (8) is fixed to one end of the second steel wire rope (12) away from the second winding drum (10).

6. The sealing method of the sealing structure of a pressurized water drilling according to claim 5, characterized in that: The sealing method comprises the following steps: Step 1: The well wall pipe (2) is inserted into the wellbore (1) and fixed, and the top of the well wall pipe (2) is one meter above the ground, and the valve (3) is opened to allow the pressurized water to flow by itself; Step 2: Calculate the volume of the wellbore (1) according to the borehole diameter and depth, and prepare sufficient cement slurry. The cement slurry is injected into the grouting pipe (407) through a slurry pump, and the cement slurry enters the rubber bellows (406) along the grouting pipe (407); Step 3: The control valve at the bottom of the rubber bellows (406) is in a closed state, and the first servo motor (404) drives the first winding drum (403) to rotate, so that the first steel wire rope (405) is released, so that the rubber bellows (406) sinks to the bottom of the well wall pipe (2) due to the influence of gravity; Step 4: When it is determined that the rubber bellows (406) reaches the bottom of the well wall pipe (2), the control valve is opened to allow the cement slurry to be discharged to the bottom of the well wall pipe (2). During the grouting process, the self-flow of pressurized water at the valve (3) is observed in real time; Step 5: The first servo motor (404) drives the first winding drum (403) to rotate and wind up the first steel wire rope (405), so that the rubber bellows (406) gradually contracts and rises, so that the cement slurry is injected into the well wall pipe (2) from bottom to top. During the injection process, the height of the cement slurry surface is determined by the pressure sensing end, so as to control the rising speed of the rubber bellows (406) in real time; Step 6: When the cement slurry injection height reaches the top plate of the pressurized water, the self-flow of the pressurized water at the valve (3) will obviously decrease. At this time, the valve (3) is closed. If diluted cement slurry is found to flow out later, the valve (3) is further closed until the valve (3) discharges cement slurry with the same specific gravity as the injected cement slurry. At this time, the grouting is stopped. Step 7: During the grouting process from bottom to top, the pressure sensing end pays attention to the height of the cement slurry surface in real time. When the height of the cement slurry surface exceeds a detection hole (6), the second servo motor (11) drives the second winding drum (10) to rotate, causing the second steel wire rope (12) to contract, so that the electric pulley (8) carrying the pressure sensor (9) moves from bottom to top to the height of the detection hole (6). Under the pressure of the cement slurry, the detection film (7) inside the detection hole (6) is subjected to force and adheres to the detection surface of the pressure sensor (9), thereby detecting whether the cement slurry is fully grouted; Step 8: Using a vibrating rubber hammer with a fixed frequency to knock the well wall pipe (2) at the top outer wall of the well wall pipe (2), so that the inner wall of the well wall pipe (2) transmits the vibration so that the cement slurry can be fully precipitated, thereby improving the pass rate of the pressure sensor (9) during detection; Step 9: After the grouting is stopped, the striking of the vibrating rubber hammer does not stop, and the height of the cement slurry surface is monitored in real time using the pressure sensing end. If the height of the cement slurry surface drops, cement slurry needs to be re-injected into the well wall pipe (2) to the original height in a timely manner.

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