A precision sealing device based on phase transformation and its usage method

Abstract

This invention discloses a precise sealing device and its method based on phase transformation. The device includes an integrated sealing and extraction component, a water injection pipe, a water return pipe, a water injection tank, and a pre-extraction pipe. The integrated sealing and extraction component mainly includes an injection / extraction pipe, a cooling network pipe, a plugging component, an auxiliary support, a power component, and a control component. Under the centralized control of the control component, the plugging component is first sent to the appropriate sealing position via the auxiliary support. Then, the adjusting column systematically supports the arc-shaped plugging plate to complete the isolation of the sealing area. Next, the power station continuously supplies cold air to the cooling network pipe, causing the sealing water to solidify and completing the sealing of the pre-extraction hole. After the gas field extraction is completed, the solid water from the plugging is allowed to liquefy and be discharged. Finally, the integrated sealing and extraction component is retrieved. This device achieves precise positioning and isolation of the borehole and retrieval of the sealing device, providing a new approach for the visualization of extraction operations.

Description

Technical Field

[0001] This invention relates to a precision sealing device and its usage method based on phase transformation, belonging to the field of gas field extraction. Background Technology

[0002] Coalbed methane (CBM) is an important component of my country's gas fields. CBM extraction is not only a fundamental measure for preventing coal mine gas disasters but also an important clean and efficient energy source. The common underground gas extraction method in coal mines involves drilling a pre-extraction hole in the coal seam, inserting an extraction pipe into the hole, sealing the pipe to the hole wall with mortar, cement, or polymer materials, and finally extracting the gas. However, this drilling and sealing method results in the extraction pipe being unrecoverable and can affect mining operations. Secondly, the commonly used drilling and sealing method is "two-plug-one-injection," where the optimal sealing effect is to encompass the fractured section within the sealing zone. However, current sealing processes often blindly determine the sealing section, resulting in fracture zones located at the two-plug positions. This leads to through-hole fractures between the sealing zone and the outside, causing the sealing material to leak out from the fractures and affecting the sealing effect.

[0003] Therefore, in order to solve the above problems, a precise sealing device and its usage method based on phase transformation are provided to meet the needs of coalbed methane extraction. Summary of the Invention

[0004] The purpose of this invention is to address the problem of blindly determining the borehole sealing section by providing a precise borehole sealing device and its usage method based on phase transformation.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A precise sealing device based on phase transformation, characterized in that it includes an integrated sealing and extraction component, a water injection pipe, a water return pipe, a water injection tank, and a pre-extraction pipe. The integrated sealing and extraction component comprises an injection / extraction pipe, a cooling network pipe, a first blocking component, a second blocking component, a first assist bracket, a second assist bracket, a long U-shaped water circulation loop, a power component, a control component, and an elastic bladder. The cooling network pipe is installed on the outer surface of the middle part of the injection / extraction pipe, and the elastic bladder is fitted onto the cooling network pipe. The two ends of the cooling network pipe are the first and second blocking components, respectively. The first and second blocking components consist of a square component with a central through hole, four sets of arc-shaped blocking plates, connecting blocking plates, an adjusting column, and hinges one and two. The outer injection and extraction pipes of component one and component two are respectively equipped with auxiliary support bracket one and auxiliary support bracket two. The injection and extraction pipe outside auxiliary support bracket one is sequentially equipped with interface three, interface one and interface two. The injection and extraction pipe in the middle of the refrigeration network pipe is equipped with a water inlet. The long U-shaped water circuit is located inside the injection and extraction pipe. The two ends of the U-shape are connected to interface one and interface two respectively, and are connected to the water tank through the water injection pipe and the water return pipe. The bottom of the U-shape is connected to the water inlet. The long U-shaped water circuit is equipped with an electric control valve at the water inlet. The outer end of the injection and extraction pipe is connected to the power component. The upper side of the power component is equipped with a control component. Component one, component two, auxiliary support bracket one, auxiliary support bracket two and the electric control valve are all connected to the control component through built-in wiring.

[0007] Furthermore, the square component is fixed on the injection / extraction pipe. The four sets of arc-shaped sealing plates, connecting sealing plates, adjusting columns, hinge one, and hinge two are connected in the same way. One end of the connecting sealing plate is connected to one side of the square component through hinge one. The two ends of the elastic bladder are installed on the square component. The other end of the connecting sealing plate is connected to the arc-shaped sealing plate through hinge two. One end of the adjusting column is connected to the injection / extraction pipe, and the other end is connected to the inner wall of the arc-shaped sealing plate. When the sealing component opens the top support hole wall, the sealing plates provided between the arc-shaped sealing plates, connecting sealing plates, and the square component can improve the sealing performance at the junction of the arc-shaped sealing plates, connecting sealing plates, and the square component.

[0008] Furthermore, the adjusting column is composed of joint one, joint two, joint three, joint four, hydraulic column one, and hydraulic column two. One end of hydraulic column one is connected to joint one, and the other end is connected to joint two. Joint one is located on the injection and extraction pipe, and joint two is located on the inner wall of the arc-shaped plug. The two ends of hydraulic column two are connected to joint three and joint four respectively. Joint three is located on hydraulic column one, and joint four is located on the inner wall of the arc-shaped plug. Joint two and joint four are located on a straight line parallel to the central axis of the square component on the inner wall of the arc-shaped plug. The control component can control the hydraulic column to perform telescopic movement and rotate around the joint, so that the arc-shaped plug can fit tightly against the hole wall and the plugging component can complete the sealing drilling operation.

[0009] Furthermore, both sides of the horizontal arc-shaped blocking plate and the connecting blocking plate are provided with convex sealing strips, and the vertical arc-shaped blocking plate and the connecting blocking plate are provided with matching concave sealing strips to improve the tightness of the blocking plate mating joint. The diameter of the outer arc wall of the arc-shaped blocking plate is consistent with the diameter of the pre-extraction hole.

[0010] Furthermore, the first and second auxiliary supports are composed of a connecting body, a hydraulic column, and a long roller. The connecting body fixes the auxiliary support to the injection / extraction pipe. The two hydraulic columns are respectively located on the front and rear sides of the connecting body. A long roller is connected to the lower side of the hydraulic column. The hydraulic column can extend and retract under the control of the control component. The long roller can roll forward or backward on the wall of the pre-extraction hole under manual pushing and pulling. The hydraulic column can complete the support operation of the sealing and extraction integrated component. The front end of the second auxiliary support is equipped with four detectors. The detectors can not only locate the auxiliary support and the blocking component, but also detect the distribution of pores and cracks in the wall of the pre-extraction hole and transmit various data to the control component. The long roller has an arc-shaped contact surface that matches the inner wall of the hole.

[0011] Furthermore, the power unit internally includes a pressurized gas tank, an air compressor, and a recovery gas tank. The refrigeration network is formed by multiple turns of pipes around the injection and extraction pipe. The outer ring of the pipe is tightly framed to the injection and extraction pipe by a fixing frame. The fixing frame consists of four upright, pin-shaped long supports connected end to end to the rings at both ends. The diameter of the ring matches the outer wall of the injection and extraction pipe. The ring is adhered to the injection and extraction pipe, thereby fixing the refrigeration network to the injection and extraction pipe. The pipes at both ends of the refrigeration network are inserted into the injection and extraction pipe to form an injection pipe and a return pipe. The injection pipe and the return pipe extend outward from the injection and extraction pipe into the power unit and are connected to the pressurized gas tank, the air compressor, and the recovery gas tank, respectively. A temperature sensor is installed on the return pipe located in the sealing area. The outer ends of the injection pipe and the return pipe are equipped with insulation sleeves. The control unit controls the power unit to inject and discharge cold air, thereby completing the refrigeration operation.

[0012] Furthermore, the injection pipe, refrigeration network pipe, long U-shaped water circuit, electric control valve, water injection pipe and return pipe all have the properties of high pressure resistance, expansion and contraction resistance and strong stability.

[0013] The present invention also provides a method for using the above-described precision sealing device based on phase transformation, characterized by comprising the following steps:

[0014] a. Insert the second auxiliary support bracket at the front end of the sealing and drawing integrated component into the pre-drawing hole. The control component adjusts the auxiliary support bracket, and the hydraulic column performs the lifting movement. When the distance from the center point of the connecting body to the edge of the long roller is the radius of the pre-drawing hole, the lifting operation of the auxiliary support bracket is completed.

[0015] b. The operator lifts the sealing and extraction integrated component and moves it forward in coordination with the sealing and extraction integrated component. During this process, the detector transmits the development of the pore fractures in the pre-extraction hole to the control component, and combines the position data of the plugging component one and the plugging component two until the plugging component one and the plugging component two are sent to the place where the integrity of the borehole wall is high and the pore fractures between the plugging components are obvious.

[0016] c. Perform the opening operation of the blocking components. The control component controls the vertical adjustment column to rise. At the same time, hydraulic column one and hydraulic column two rotate adaptively around joint one, joint two and joint three and joint four respectively. Meanwhile, the arc blocking plate and the connecting blocking plate rotate adaptively around hinge one and hinge two until the arc blocking plate supports the pre-extraction hole wall.

[0017] d. Subsequently, the control unit controls the horizontal adjustment column to rise. Similarly, the related supporting devices move adaptively until the horizontal and vertical arc-shaped blocking plates and connecting blocking plates intersect. At this time, the convex sealing strip and the concave sealing strip can achieve a tight closure at the joint.

[0018] e. Retract the hydraulic cylinders of the first and second auxiliary supports, connect the water injection pipe to the water injection tank through interface one, connect the return water pipe to the water injection tank through interface two, connect the pre-extraction pipe to interface three, and connect valve one, valve two, valve three and the water injection tank to the control components through lead wires.

[0019] f. Operate the control unit, open valve one and the electric control valve to connect the water tank and the sealing area. Then, start the water tank and use low water pressure to flow water along the water injection pipe and the long U-shaped water passage into the elastic bladder of the sealing area. As the water volume increases, the elastic bladder expands and fills the entire sealing area.

[0020] g. Once the water injection volume has significantly decreased, close the electric control valve, open the water circuit, open valve two, and start the air pressure mode of the water injection tank to pressurize the remaining water in the water injection pipe and water circuit back into the water injection tank. At the same time, operate the control unit to start the cooling operation of the power unit. The pressurized gas tank will pressurize the cold air source into the cooling network pipe through the gas injection pipe, exchange heat with the sealing water outside the cooling network pipe, and solidify it. When the temperature sensor detects that the temperature of the cold air source is higher than a certain temperature, open the recovery gas tank to recover the gas source. At the same time, inject new cold air into the pressurized gas tank until the cold air source is renewed. Repeat the injection and renewal of the cold air source until the gas extraction operation is completed.

[0021] h. Once the temperature sensor readings stabilize, open valve three to begin gas extraction operations;

[0022] i. After the gas field extraction concentration drops significantly, the control unit closes valve three to stop the gas field extraction operation. Then, disconnect the pre-extraction pipe from interface three and valve three from the control unit. At the same time, start the power unit. The air compressor pump pressurizes the cold air source in the injection pipe and return pipe into the recovery gas tank. After the solid sealing water loses its cold source, it slowly melts into liquid under the influence of the mine temperature.

[0023] j. Perform the lifting operation of the support bracket, and at the same time open the electric control valve and start the air pressure mode of the water injection tank to pressurize the liquefied water in the elastic bag back into the water injection tank.

[0024] k. Disconnect the water inlet pipe and interface 1, the water return pipe and interface 2, and the valves 1 and 2 from the control components;

[0025] l. The control unit controls the blocking component to perform the retraction operation. The control unit controls the horizontal adjustment column to perform the retraction movement. At the same time, the related devices make adaptive movements, so that the horizontal arc blocking plate and the connecting blocking plate move closer to the central axis. When the horizontal device retracts, the control unit controls the vertical adjustment column to perform the retraction movement. The related devices make adaptive movements, and finally complete the retraction operation of the blocking component.

[0026] m. To retrieve the device, after the retraction of the sealing components is completed, the integrated sealing and extraction component is manually retrieved.

[0027] Beneficial effects

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. A support bracket is set up for precise isolation operations. The detector can transmit the integrity status of the inner wall of the pre-extraction hole to the control unit. The control unit integrates the position data of the plugging components and, based on the development of cracks in the hole wall, sends plugging components one and two to the location with high hole wall integrity, thereby achieving precise sealing of the borehole and improving the borehole sealing effect.

[0030] II. This device utilizes the solid-liquid phase transformation principle of water to perform isolation and sealing drilling operations. On the one hand, the water flow can penetrate deeper into the borehole fissures, allowing it to cool and solidify, thereby improving the sealing performance of the borehole. On the other hand, after the extraction operation is completed, the sealing water is liquefied and drained, enabling the complete recovery of the integrated sealing and extraction components.

[0031] Third, this device consists of a plugging component controlled by an adjusting column. It can not only seal the sealing area by raising and lowering the adjusting column, but also support the drill hole with the arc-shaped plugging plate, effectively preventing the drill hole on both sides of the sealing area from collapsing and affecting the sealing effect. At the same time, it also provides the necessary conditions for the recyclability of the device.

[0032] IV. This device integrates multiple sensors, detectors and valves through a control unit to achieve semi-automation of sealing and extraction operations, which can reduce the workload and improve the accuracy of workers. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of the integrated sealing and drawing component of the present invention.

[0034] Figure 2 This is a schematic diagram of the structure of the device of the present invention.

[0035] Figure 3 This is a schematic diagram of the water flow channel and the air injection and return channel of the integrated sealing and extraction component of the present invention.

[0036] Figure 4 This is a schematic diagram of the structure of the assistive support bracket.

[0037] Figure 5 This is a schematic diagram of the contact between the long roller and the inner wall of the pre-extraction hole.

[0038] Figure 6 This is a schematic diagram of the blocking component of the device of the present invention.

[0039] Figure 7 This is a schematic diagram of the structure of the adjusting column of the device of the present invention.

[0040] Figure 8 This is a schematic diagram of the connection between hinge one and hinge two and the arc-shaped blocking plate and the connecting blocking plate.

[0041] Figure 9 This is a schematic diagram of the bonding structure of the concave and convex sealing strips.

[0042] Figure 10 This is a schematic diagram of the opening process of the blocking component.

[0043] Figure 11 This is a structural diagram of the fixed frame.

[0044] In the diagram: 1. Gas storage layer, 2. Pre-extraction hole, 3. Integrated sealing and extraction component, 3-1. Injection and extraction pipe, 3-2. Refrigeration network pipe, 3-31. Blocking component one, 3-32. Blocking component two, 3-41. Assisting support one, 3-42. Assisting support two, 3-421. Connector, 3-422. Hydraulic column, 3-423. Long roller, 3-424. Detector, 3-5. Long U-shaped water circuit, 3-61. Interface one, 3-62. Interface two, 3-63. Interface three, 3-7. Water inlet, 3-8. Electrically controlled valve, 3-9. Power component, 3-91. Pressurized gas tank, 3-92. Empty Air compressor, 3-93. Recovered air tank, 3-10. Control components, 3-11. Elastic bladder, 4-1. Square component, 4-21. Arc-shaped septum, 4-22. Connecting septum, 4-3. Adjusting column, 4-311. Joint 1, 4-312. Joint 2, 4-313. Joint 3, 4-314. Joint 4, 4-321. Hydraulic column 1, 4-322. Hydraulic column 2, 4-41. Hinge 1, 4-42. Hinge 2, 5-1. Valve 1, 5-2. Valve 2, 5-3. Valve 3, 6. Water injection pipe, 7. Water return pipe, 8. Water injection tank, 9. Pre-extraction pipe, 10. Lead wire. Detailed implementation method:

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0047] like Figure 1-11As shown, a precision sealing device based on phase transformation includes an integrated sealing and extraction component 3, a water injection pipe 6, a return water pipe 7, a water injection tank 8, and a pre-extraction pipe 9. The integrated sealing and extraction component 3 is composed of an injection / extraction pipe 3-1, a cooling network pipe 3-2, a first blocking component 3-31, a second blocking component 3-32, a first assisting support 3-41, a second assisting support 3-42, a long U-shaped water passage circuit 3-5, a power component 3-9, a control component 3-10, and an elastic bladder 3-11. The cooling network pipe 3-2 is installed in the injection / extraction tank. On the outer surface of the middle part of the tube 3-1, an elastic bladder 3-11 is fitted onto the refrigeration network tube 3-2, possessing good toughness and elasticity. The two ends of the refrigeration network tube 3-2 are respectively a first blocking component 3-31 and a second blocking component 3-32. The first blocking component 3-31 and the second blocking component 3-32 are composed of a square component 4-1 with a central through hole, four sets of arc-shaped blocking plates 4-21, connecting blocking plates 4-22, an adjusting column 4-3, a first hinge 4-41, and a second hinge 4-42. The first blocking component 3-31... -31 and the outer injection / extraction pipe 3-1 of the blocking component 2 3-32 are respectively equipped with auxiliary support bracket 1 3-41 and auxiliary support bracket 2 3-42. The injection / extraction pipe 3-1 outside the auxiliary support bracket 1 3-41 is provided with interface 3 3-63, interface 1 3-61 and interface 2 3-62 in sequence. The injection / extraction pipe 3-1 in the middle of the refrigeration network pipe 3-2 is provided with a water inlet 3-7. The long U-shaped water circuit 3-5 is located inside the injection / extraction pipe 3-1, and the two ends of the U-shape are connected to interface 1 3-61 and interface 2 3-62 respectively. It is connected to the water tank 8 via the water injection pipe 6 and the return pipe 7. The bottom of the U-shaped pipe is connected to the water inlet 3-7. The long U-shaped water circuit 3-5 is equipped with an electric control valve 3-8 at the water inlet 3-7. The outer end of the injection and extraction pipe 3-1 is connected to the power component 3-9. The upper side of the power component 3-9 is equipped with a control component 3-10. The first blocking component 3-31, the second blocking component 3-32, the first assist bracket 3-41, the second assist bracket 3-42 and the electric control valve 3-8 are all connected to the control component 3-10 through built-in wiring.

[0048] Furthermore, the square component 4-1 is fixed on the injection / extraction tube 3-1. The four sets of arc-shaped sealing plates 4-21, connecting sealing plates 4-22, adjusting columns 4-3, hinge one 4-41, and hinge two 4-42 are connected in the same way. One end of the connecting sealing plate 4-22 is connected to one side of the square component 4-1 through hinge one 4-41. Both ends of the elastic bladder 3-11 are installed on the square component 4-1, and the other end of the connecting sealing plate 4-22 is connected to... The hinge 4-42 is connected to the arc-shaped plug 4-21. One end of the adjusting column 4-3 is connected to the injection pipe 3-1, and the other end is connected to the inner wall of the arc-shaped plug 4-21. When the plugging component opens the top support hole wall, the sealing plates provided between the arc-shaped plug 4-21, the connecting plug 4-22, and the square component 4-1 can improve the sealing performance at the junction of the arc-shaped plug 4-21, the connecting plug 4-22, and the square component 4-1.

[0049] Furthermore, the adjusting column 4-3 is composed of joint one 4-311, joint two 4-312, joint three 4-313, joint four 4-314, hydraulic column one 4-321, and hydraulic column two 4-322. One end of hydraulic column one 4-321 is connected to joint one 4-311, and the other end is connected to joint two 4-312. Joint one 4-311 is located on the injection / extraction pipe 3-1, joint two 4-312 is located on the inner wall of the arc-shaped plug septum 4-21, and both ends of hydraulic column two 4-322 are respectively connected to joint three. Joints 4-313 and 4-314 are located on hydraulic column 4-321. Joint 4-314 is located on the inner wall of the arc-shaped sealing plate 4-21. Joints 2-312 and 4-314 are located on a straight line parallel to the central axis of the square component 4-1 on the inner wall of the arc-shaped sealing plate 4-21. The control component 3-10 can control the hydraulic column to perform telescopic movement and rotate around the joints, so that the arc-shaped sealing plate 4-21 can fit tightly against the hole wall and the sealing component can complete the sealing drilling operation.

[0050] Furthermore, both sides of the horizontal arc-shaped blocking plate 4-21 and the connecting blocking plate 4-22 are provided with convex sealing strips, and the vertical arc-shaped blocking plate 4-21 and the connecting blocking plate 4-22 are provided with matching concave sealing strips to improve the tightness of the blocking plate mating joint. The diameter of the outer arc wall of the arc-shaped blocking plate 4-21 is consistent with the diameter of the pre-extraction hole 2.

[0051] Furthermore, the first assist bracket 3-41 and the second assist bracket 3-42 are composed of a connecting body 3-421, a hydraulic column 3-422, and a long roller 3-423. The connecting body 3-421 fixes the assist bracket to the injection / extraction pipe 3-1. The two hydraulic columns 3-422 are respectively located on the front and rear sides of the connecting body 3-421. A long roller 3-423 is connected to the lower side of the hydraulic column 3-422. The hydraulic column 3-422 can extend and retract under the control of the control component 3-10. The long roller 3-423... 23 can roll forward or backward on the wall of the pre-extraction hole 2 under manual pushing and pulling. The hydraulic column 3-422 can complete the support operation of the sealing and extraction integrated component 3. The front end of the auxiliary support 3-42 is equipped with four detectors 3-424. The detectors 3-424 can not only position the auxiliary support and the blocking component, but also detect the distribution of pores and cracks in the wall of the pre-extraction hole, and transmit various data to the control component 3-10. The long roller 3-423 has an arc-shaped contact surface, and the arc surface matches the inner wall of the hole.

[0052] Furthermore, based on the position data of the auxiliary support located by detector 3-424, combined with the inherent position data of the plugging component on the integrated sealing and extraction component, and the drilling inclination angle and device depth data, the real-time position data of the plugging component can be obtained.

[0053] Furthermore, the power component 3-9 internally includes a pressurized air tank 3-91, an air compressor 3-92, and a recovery air tank 3-93. The refrigeration network pipe 3-2 is formed by multiple turns of pipe around the injection pipe 3-1. The outer ring of the pipe is tightly bound to the injection pipe 3-1 by a fixing frame. The fixing frame consists of four upright, pin-shaped long supports connected end-to-end to the ring at both ends. The diameter of the ring matches the outer wall of the injection pipe 3-1. The ring is adhered to the injection pipe 3-1, thereby fixing the refrigeration network pipe 3-2 to the injection pipe 3-1. -1. The pipes at both ends of the refrigeration network pipe 3-2 are inserted into the injection and extraction pipe 3-1 to form an injection pipe and a return pipe. The injection pipe and the return pipe extend outward from the injection and extraction pipe 3-1 into the power component 3-9, and are respectively connected to the pressure storage tank 3-91, the air compressor 3-92 and the recovery tank 3-93. A temperature sensor is installed on the return pipe located in the blockage area. The outer ends of the injection pipe and the return pipe are equipped with heat insulation sleeves. The control component 3-10 controls the power component 3-9 to inject and discharge cold air source, thereby completing the refrigeration operation.

[0054] Furthermore, the injection pipe 3-1, the refrigeration network pipe 3-2, the long U-shaped water circuit 3-5, the electric control valve 3-8, the water injection pipe 6, and the return water pipe 7 all have the properties of high pressure resistance, expansion and contraction resistance, and strong stability.

[0055] Example 2

[0056] A method of using the precision sealing device based on phase transformation according to Embodiment 1 includes the following steps:

[0057] a. Insert the auxiliary support bracket 3-42 at the front end of the sealing and drawing integrated component 3 into the pre-drawing hole. The control component (3-10) adjusts the auxiliary support bracket, and the hydraulic column 3-422 performs the lifting movement. When the distance from the center point of the connecting body 3-421 to the edge of the long roller 3-423 is equal to the radius of the pre-drawing hole 2, the lifting operation of the auxiliary support bracket is completed.

[0058] b. The operator lifts the sealing and extraction integrated component 3 and moves it forward in coordination with the sealing and extraction integrated component 3. During this process, the detector 3-424 transmits the development of the pore fracture in the pre-extraction hole 2 to the control component 3-10, and combines it with the position data of the first plugging component 3-31 and the second plugging component 3-32 until the first plugging component 3-31 and the second plugging component 3-32 are sent to the place where the borehole wall integrity is high and the pore fracture development between the plugging components is obvious.

[0059] c. Perform the opening operation of the blocking components. Control component 3-10 controls the vertical adjustment column 4-3 to rise. At the same time, hydraulic column one 4-321 and hydraulic column two 4-322 rotate adaptively around joint one 4-311, joint two 4-312, joint three 4-313, and joint four 4-314, respectively. Meanwhile, the arc blocking plate 4-21 and connecting blocking plate 4-22 rotate adaptively around hinge one 4-41 and hinge two 4-42 until the arc blocking plate 4-21 supports the wall of the pre-extraction hole 2.

[0060] d. Subsequently, the control component 3-10 controls the horizontal adjustment column 4-3 to rise. Similarly, the related supporting devices move adaptively until the horizontal and vertical arc-shaped blocking plates 4-21 and connecting blocking plates 4-22 intersect. At this time, the convex sealing strip and the concave sealing strip can achieve a tight closure at the joint.

[0061] e. Retract the hydraulic cylinders of the first auxiliary support bracket 3-41 and the second auxiliary support bracket 3-42, connect the water injection pipe 6 to the water injection tank 8 through the first interface 3-61, connect the return water pipe 7 to the water injection tank 8 through the second interface 3-62, connect the pre-extraction pipe 9 to the third interface 3-63, and connect the first valve 5-1, the second valve 5-2, the third valve 5-3 and the water injection tank 8 to the control component 3-10 through the lead wire 10;

[0062] f. Operate the control unit 3-10, open valve 5-1 and electric control valve 3-8 to connect water tank 8 and sealing area. Then, start water tank 8 to flow water along water pipe 6 and long U-shaped water circuit 3-5 into elastic bladder 3-11 of sealing area with low water pressure. As the water volume increases, elastic bladder 3-11 expands to fill the entire sealing area.

[0063] g. When the water injection volume decreases significantly, close the electric control valve 3-8, open the long U-shaped water circuit 3-5, open valve 2 5-2 and start the air pressure mode of the water injection tank 8 to pressurize the remaining water in the water injection pipe 6 and the water circuit 3-5 back into the water injection tank 8. At the same time, operate the control component 3-10 to start the cooling operation of the power component 3-9. The pressurized gas tank 3-91 pressurizes the cold air source into the cooling network pipe 3-2 through the gas injection pipe, and exchanges heat with the sealing water outside the cooling network pipe 3-2 to solidify it. When the temperature sensor detects that the temperature of the cold air source is higher than a certain temperature, open the recovery gas tank 3-93 to recover the gas source. At the same time, the pressurized gas tank 3-91 injects new cold air flow until the cold air source is renewed. Repeat the injection and renewal of the cold air source until the gas extraction operation is completed.

[0064] h. Once the temperature sensor temperature stabilizes, open valve 35-3 to begin gas extraction operations;

[0065] i. After the gas field extraction concentration drops significantly, control component 3-10 closes valve 3-5-3 to stop the gas field extraction operation. Then disconnect the pre-extraction pipe 9 from interface 3-63 and the valve 3-5-3 from control component 3-10. At the same time, start power component 3-9. Air compressor 3-92 pressurizes the cold air source in the injection pipe and return pipe into the recovery gas tank 3-93. After the solid sealing water loses its cold source, it slowly melts into liquid under the influence of the mine temperature.

[0066] j. Perform the lifting operation of the support bracket, and at the same time open the electric control valve 3-8 and start the air pressure mode of the water injection tank 8 to pressurize the liquefied water in the elastic bag 3-11 back to the water injection tank 8.

[0067] k. Disconnect the water inlet pipe 6 and interface 1 3-61, the return water pipe 7 and interface 2 3-62, and the valve 1 5-1, valve 2 5-2 from the control component 3-10;

[0068] l. Control unit 3-10 controls the blocking component to perform the retraction operation. Control unit 3-10 controls the horizontal adjusting column 4-3 to perform the retraction movement. At the same time, the relevant devices make adaptive movements, so that the horizontal arc blocking plate 4-21 and the connecting blocking plate 4-22 move closer to the central axis. When the horizontal device retracts, control the vertical adjusting column 4-3 to perform the retraction movement. The relevant devices make adaptive movements, and finally complete the retraction operation of the blocking component.

[0069] m. To retrieve the device, after the retraction of the sealing components is completed, the integrated sealing and extraction component is manually retrieved.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any equivalent structures or equivalent transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A precision sealing device based on phase transformation, characterized in that, The system includes an integrated sealing and extraction component (3), a water injection pipe (6), a return water pipe (7), a water injection tank (8), and a pre-extraction pipe (9). The integrated sealing and extraction component (3) is composed of an injection and extraction pipe (3-1), a refrigeration network pipe (3-2), a first blocking component (3-31), a second blocking component (3-32), a first assist bracket (3-41), a second assist bracket (3-42), a long U-shaped water circulation circuit (3-5), a power component (3-9), a control component (3-10), and an elastic bladder (3-11). The refrigeration network pipe (3-2) is installed in the middle of the injection and extraction pipe (3-1). On the outer surface, an elastic bladder (3-11) is fitted onto the refrigeration network tube (3-2). The two ends of the refrigeration network tube (3-2) are respectively a first blocking component (3-31) and a second blocking component (3-32). The first blocking component (3-31) and the second blocking component (3-32) are composed of a square component (4-1) with a central through hole, four sets of arc-shaped blocking plates (4-21), connecting blocking plates (4-22), an adjusting column (4-3), a first hinge (4-41), and a second hinge (4-42). The first blocking component (3-31) and the second blocking component (3-32)... The outer injection pipe (3-1) is equipped with an auxiliary support bracket 1 (3-41) and an auxiliary support bracket 2 (3-42). The injection pipe (3-1) outside the auxiliary support bracket 1 (3-41) is equipped with an interface 3 (3-63), an interface 1 (3-61), and an interface 2 (3-62) in sequence. The injection pipe (3-1) in the middle of the refrigeration network pipe (3-2) is equipped with a water inlet (3-7). The long U-shaped water circuit (3-5) is located inside the injection pipe (3-1). The two ends of the U-shape are connected to the interface 1 (3-61) and the interface 2 (3-62) respectively and pass through the water injection pipe (6). The return water pipe (7) is connected to the water tank (8), and the bottom of the U-shaped pipe is connected to the water inlet (3-7). The long U-shaped water circuit (3-5) is equipped with an electric control valve (3-8) at the water inlet (3-7). The end of the outside of the injection pipe (3-1) is connected to the power component (3-9). The upper side of the power component (3-9) is equipped with a control component (3-10). The first blocking component (3-31), the second blocking component (3-32), the first assist bracket (3-41), the second assist bracket (3-42), and the electric control valve (3-8) are all connected to the control component (3-10) through built-in wiring.

2. The precision sealing device based on phase transformation according to claim 1, wherein, The square component (4-1) is fixed on the injection / extraction pipe (3-1). The four sets of arc-shaped septa (4-21), the connecting septa (4-22), the adjusting column (4-3), the hinge one (4-41), and the hinge two (4-42) are connected in the same way. One end of the connecting septa (4-22) is connected to one side of the square component (4-1) through the hinge one (4-41). Both ends of the elastic bladder (3-11) are installed on the square component (4-1), and the other end of the connecting septa (4-22) is connected to the square component (4-1) through the hinge one (4-41). Hinge 2 (4-42) is connected to the arc-shaped plug (4-21). One end of the adjusting column (4-3) is connected to the injection pipe (3-1), and the other end is connected to the inner wall of the arc-shaped plug (4-21). When the plugging component opens the top support hole wall, the sealing plates provided between the arc-shaped plug (4-21), the connecting plug (4-22), and the square component (4-1) can improve the sealing performance at the junction of the arc-shaped plug (4-21), the connecting plug (4-22), and the square component (4-1).

3. The precision sealing device based on phase transformation according to claim 2, wherein, The adjusting column (4-3) is composed of joint one (4-311), joint two (4-312), joint three (4-313), joint four (4-314), hydraulic column one (4-321), and hydraulic column two (4-322). One end of hydraulic column one (4-321) is connected to joint one (4-311), and the other end is connected to joint two (4-312). Joint one (4-311) is located on the injection / extraction pipe (3-1), and joint two (4-312) is located on the inner wall of the arc-shaped septum (4-21). Both ends of hydraulic column two (4-322) are connected to joint three. (4-313) and joint four (4-314), joint three (4-313) is located on hydraulic column one (4-321), joint four (4-314) is located on the inner wall of the arc-shaped plug (4-21), joint two (4-312) and joint four (4-314) are located on a straight line parallel to the central axis of the square component (4-1) on the inner wall of the arc-shaped plug (4-21). The control component (3-10) can control the hydraulic column to perform telescopic movement and rotate around the joint, so that the arc-shaped plug (4-21) can be tightly attached to the hole wall and the plugging component can complete the sealing drilling operation.

4. The precision sealing device based on phase transformation according to claim 2, characterized in that, Both sides of the horizontal arc-shaped blocking septum (4-21) and the connecting blocking septum (4-22) are provided with convex sealing strips, and the vertical arc-shaped blocking septum (4-21) and the connecting blocking septum (4-22) are provided with matching concave sealing strips to improve the tightness of the blocking septum mating joint. The diameter of the outer arc wall of the arc-shaped blocking septum (4-21) is consistent with the diameter of the pre-extraction hole (2).

5. The precision sealing device based on phase transformation according to claim 1, characterized in that, The first and second auxiliary supports (3-41) are composed of a connecting body (3-421), a hydraulic column (3-422), and a long roller (3-423). The connecting body (3-421) fixes the auxiliary support to the injection / extraction pipe (3-1). The two hydraulic columns (3-422) are respectively located on the front and rear sides of the connecting body (3-421). A long roller (3-423) is connected to the lower side of the hydraulic column (3-422). The hydraulic column (3-422) can extend and retract under the control of the control component (3-10). 3-423) can roll forward or backward on the wall of the pre-extraction hole (2) under manual pushing and pulling. The hydraulic column (3-422) can complete the support operation of the sealing and extraction integrated component (3). The front end of the auxiliary support bracket (3-42) is equipped with four detectors (3-424). The detectors (3-424) can not only position the auxiliary support bracket and the blocking component, but also detect the distribution of the hole cracks in the wall of the pre-extraction hole, and transmit various data to the control component (3-10). The long roller (3-423) has an arc-shaped contact surface, and the arc surface matches the inner wall of the hole.

6. The precision sealing device based on phase transformation according to claim 1, characterized in that, The power component (3-9) internally houses a pressurized gas tank (3-91), an air compressor (3-92), and a recovery gas tank (3-93). The refrigeration network pipe (3-2) is formed by multiple turns of pipe around the injection pipe (3-1). The outer ring of the pipe is tightly framed to the injection pipe (3-1) by a fixing frame. The fixing frame consists of four upright, pin-shaped long supports connected end-to-end to the rings at both ends. The diameter of the ring matches the outer wall of the injection pipe (3-1). The ring is adhered to the injection pipe (3-1), thereby fixing the refrigeration network pipe (3-2) to the injection pipe (3-1). On the refrigeration network pipe (3-2), the pipes at both ends are inserted into the injection and extraction pipe (3-1) to form an injection pipe and a return pipe. The injection pipe and the return pipe extend outward from the injection and extraction pipe (3-1) into the power unit (3-9) and are connected to the pressure tank (3-91), the air compressor (3-92) and the recovery tank (3-93) respectively. A temperature sensor is provided on the return pipe located in the blockage area. The outer ends of the injection pipe and the return pipe are provided with heat insulation sleeves. The control unit (3-10) controls the power unit (3-9) to inject cold air source and discharge cold air source, thereby completing the refrigeration operation.

7. The precision sealing device based on phase transformation according to claim 1, characterized in that, The injection pipe (3-1), refrigeration network pipe (3-2), long U-shaped water circuit (3-5), electric control valve (3-8), water injection pipe (6) and water return pipe (7) all have the properties of high pressure resistance, expansion and contraction resistance and strong stability.

8. A method of using a precision sealing device based on phase transformation according to any one of claims 1-7, characterized in that, Includes the following steps: a. Insert the second auxiliary support bracket (3-42) at the front end of the sealing and drawing integrated component (3) into the pre-drawing hole (2), and control component (3-10) adjusts the auxiliary support bracket. The hydraulic column (3-422) performs the lifting movement. When the distance from the center point of the connecting body (3-421) to the edge of the long roller (3-423) is the radius of the pre-drawing hole (2), the lifting operation of the auxiliary support bracket is completed. b. The operator lifts the sealing and extraction integrated component (3) and moves forward in coordination with the sealing and extraction integrated component (3). During this process, the detector (3-424) transmits the development of the hole fracture in the pre-extraction hole (2) to the control component (3-10) and combines it with the position data of the first plugging component (3-31) and the second plugging component (3-32) until the first plugging component (3-31) and the second plugging component (3-32) are sent to the place where the borehole wall integrity is high and the hole fracture between the plugging components is obvious. c. Perform the opening operation of the blocking component. The control component (3-10) controls the vertical adjustment column (4-3) to rise. At the same time, hydraulic column one (4-321) and hydraulic column two (4-322) rotate adaptively around joint one (4-311), joint two (4-312), joint three (4-313), and joint four (4-314), respectively. Meanwhile, the arc blocking plate (4-21) and connecting blocking plate (4-22) rotate adaptively around hinge one (4-41) and hinge two (4-42) until the arc blocking plate (4-21) supports the wall of the pre-extraction hole (2). d. Subsequently, the control unit (3-10) controls the horizontal adjustment column (4-3) to rise. Similarly, the related supporting devices make adaptive movements until the horizontal and vertical arc-shaped blocking plates (4-21) and connecting blocking plates (4-22) intersect. At this time, the convex sealing strip and the concave sealing strip can achieve tight closure at the joint. e. Retract the hydraulic columns of the first (3-41) and the second (3-42) auxiliary support brackets, connect the water injection pipe (6) to the water injection tank (8) through the first (3-61) interface, connect the return water pipe (7) to the water injection tank (8) through the second (3-62) interface, connect the pre-extraction pipe (9) to the third (3-63) interface, and connect the first (5-1), the second (5-2), the third (5-3) valves and the water injection tank (8) to the control unit (3-10) through the lead wire (10); f. Operate the control unit (3-10), open valve one (5-1) and the electric control valve (3-8) to connect the water injection tank (8) and the sealing area. Then, start the water injection tank (8) to flow water along the water injection pipe (6) and the water circulation circuit (3-5) into the elastic bladder (3-11) of the sealing area with low water pressure. As the water injection volume increases, the elastic bladder (3-11) expands and fills the entire sealing area. g. When the water injection volume decreases significantly, close the electric control valve (3-8), open the water circuit (3-5), open valve two (5-2) and start the air pressure mode of the water injection tank (8), pressurize the remaining water in the water injection pipe (6) and the long U-shaped water circuit (3-5) back into the water injection tank (8), and at the same time, operate the control component (3-10) to start the cooling operation of the power component (3-9). The pressure tank (3-91) pressurizes the cold air source into the cooling network pipe (3-2) through the air injection pipe, and exchanges heat with the sealing water outside the cooling network pipe (3-2) to solidify it. When the temperature sensor detects that the temperature of the cold air source is higher than a certain temperature, open the recovery gas tank (3-93) to recover the gas source. At the same time, the pressure tank (3-91) injects new cold air flow until the cold air source is updated. Repeat the injection and update of the cold air source until the gas extraction operation is completed. h. Once the temperature sensor temperature stabilizes, open valve three (5-3) to begin gas extraction operations; i. After the gas field extraction concentration drops significantly, the control unit (3-10) closes valve three (5-3) to stop the gas field extraction operation. Then, disconnect the pre-extraction pipe (9) from interface three (3-63) and valve three (5-3) from the control unit (3-10). At the same time, start the power unit (3-9). The air compressor (3-92) pressurizes the cold air source in the injection pipe and return pipe into the recovery gas tank (3-93). After the solid sealing water loses its cold source, it slowly melts into liquid under the influence of the mine temperature. j. Perform the lifting operation of the support bracket, and at the same time open the electric control valve (3-8) and start the air pressure mode of the water injection tank (8) to pressurize the liquefied water in the elastic bag (3-11) back to the water injection tank (8). k. Disconnect the water inlet pipe (6) and interface one (3-61), the return water pipe (7) and interface two (3-62), and the connection between valve one (5-1), valve two (5-2) and control component (3-10); l. The control unit (3-10) controls the blocking component to perform the retraction operation. The control unit (3-10) controls the horizontal adjusting column (4-3) to perform the retraction movement. At the same time, the related devices make adaptive movements, so that the horizontal arc blocking plate (4-21) and the connecting blocking plate (4-22) move closer to the central axis. When the horizontal device retracts, the control unit (3-10) controls the vertical adjusting column (4-3) to perform the retraction movement. The related devices make adaptive movements, and finally complete the retraction operation of the blocking component. m. To retrieve the device, after the retraction of the sealing components is completed, the integrated sealing and extraction component is manually retrieved.

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