Reusable nanometer polymer water-absorbent resin intelligent hole sealing system and method

Abstract

The invention discloses a reusable nano polymer water-absorbent resin intelligent hole sealing system and method. The system is connected with a reusable nano polymer water-absorbent resin device and an intelligent regulation and control device through a low-temperature-resistant pumping pipeline and a circuit; the nano high-molecular water-absorbent resin device comprises an elastic fixing device formed by arranging basic plugging units, a flow guide sleeve and an electronic pressure gauge; the basic plugging unit is elastically packaged through a nanometer macromolecule water-absorbent resin flexible sticky plate, an elastic grid reinforcing film, a resistance heating circuit and a water and liquid nitrogen conveying pipeline in a stacked mode, and is controlled through a water and liquid nitrogen pumping unit and a temperature and pressure control unit in the intelligent regulation and control device. According to the intelligent hole sealing system, the volume of the hole sealing device can be greatly changed by utilizing the characteristics of repeated water absorption and drainage and easy water absorption expansion of nano polymer resin and assisting liquid nitrogen freezing, and intelligent hole sealing in a limited drilling space is efficiently realized; and meanwhile, the device can be repeatedly used and has relatively high environment-friendly and economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas resource drilling and production, and particularly relates to a reusable nano-polymer water-absorbing resin intelligent hole-sealing system and method. Background Art

[0002] Hole-sealing technology is widely used in multiple fields, such as mine safety, oil and gas exploitation, geological exploration, etc., to prevent the leakage of gas or liquid and ensure operation safety and environmental quality.

[0003] Currently, the commonly used plugging materials have unstable chemical stability and temperature resistance, and the plugging cost is relatively high. It is difficult to achieve multiple uses. After use, they are likely to cause ecological pollution when remaining in the environment. Some sealing materials may contain harmful chemical substances, posing potential risks to the environment and human health. In addition, it is difficult to monitor the effect after hole-sealing in real time. Once leakage occurs, it may not be easily detected in time. If the seal fails, the cost of repair and re-sealing is relatively high.

[0004] Therefore, in view of the above problems, there is an urgent need to explore a plugging material and system with real-time monitoring, low cost, chemical stability and environmental protection, so as to improve the seal construction technology and enhance the construction efficiency and sealing effect. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a reusable nano-polymer water-absorbing resin intelligent hole-sealing system and method, which utilize the characteristics of the nano-polymer resin to absorb water and expand, and when saturated with water and placed in a closed space, its volume expands again under liquid nitrogen freezing, combined with an intelligent control system for real-time monitoring and analysis, to achieve cost reduction and efficiency improvement in hole plugging.

[0006] The present invention adopts the following technical scheme: A reusable nano-polymer water-absorbing resin intelligent hole-sealing system, comprising: a nano-polymer water-absorbing resin device and an intelligent control device.

[0007] The nano-polymer water-absorbing resin device includes: a diversion casing, an electronic pressure gauge, and an elastic fixing device; the intelligent control device includes: a water and liquid nitrogen pumping unit and a temperature and pressure control unit.

[0008] The elastic fixing device is reusable and is formed by arranging basic plugging units; the basic plugging unit is stacked and elastically encapsulated from top to bottom by a nano-polymer water-absorbing resin flexible adhesive board, an elastic grid reinforcement film, a resistance heating circuit, and a water and liquid nitrogen delivery pipeline; the electronic pressure gauge is arranged at the end of the diversion casing, and the end of the diversion casing is nested in the middle circular hole of the elastic fixing device and is sent into the artificial drill hole together with the elastic fixing device.

[0009] The water and liquid nitrogen pumping unit is connected to the water and liquid nitrogen delivery pipelines through a transport pipe; the temperature and pressure control unit is connected to the resistance heating circuit through a heating and temperature and pressure acquisition circuit.

[0010] Preferably, the elastic fixing device is a hollow cylinder, and the side of the hollow cylinder is sutured and encapsulated with the foundation sealing unit through an elastic material.

[0011] Preferably, the material of the elastic fixing device is a nano-polymer water-absorbing resin; the nano-polymer water-absorbing resin flexible adhesive plate and the elastic grid reinforcement film are used for resin fixing. When the resin absorbs water and swells, the elastic grid reinforcement film deforms and adheres tightly to the artificial drill hole.

[0012] Preferably, among the four foundation sealing units distributed on the mutually perpendicular diameters of the hollow cylinder, a data acquisition circuit is also overlapped and arranged inside the resistance heating circuit, which is connected to a data acquisition terminal; the data acquisition terminal is hermetically and insulatedly encapsulated and includes a pressure sensor and a temperature sensor; the temperature and pressure control unit acquires the data of the pressure sensor and the temperature sensor through the heating and temperature and pressure acquisition circuit.

[0013] Preferably, the pressure sensor and the temperature sensor are low-temperature resistant; the resistance heating circuit controls the heating temperature to promote the resin to release the absorbed water.

[0014] Preferably, the temperature and pressure control unit includes a preset parameter port, a decision port, and a control port, and is also connected to an electronic pressure gauge; the preset parameter port presets the plugging pressure and temperature values, and acquires the data of the pressure sensor and the temperature sensor. The decision port is used for data analysis and adjusts the plugging pressure according to requirements to generate a control instruction. The control port transmits the control instruction to the water and liquid nitrogen pumping unit through a circuit and then to the water and liquid nitrogen delivery pipelines through a transport pipe to adjust the pressure and temperature inside the foundation sealing unit.

[0015] Preferably, when the plugging pressure is insufficient or the airtightness requirement is not met, the decision port sends an instruction to the water and liquid nitrogen pumping unit to make the elastic fixing device absorb water and swell by pumping water until the set plugging pressure is reached. After monitoring that the value of the electronic pressure gauge is stable, the pumping stops; when a greater plugging pressure is required and pumping water cannot meet the requirement, the control port sends an instruction to the water and liquid nitrogen pumping unit to make the elastic fixing device freeze and expand by pumping liquid nitrogen, and at the same time increase the plugging pressure to ensure high tightness.

[0016] Preferably, the temperature and pressure control unit also sends a heating instruction to the resistance heating circuit through the control port to control the water separation of the foundation sealing unit, and turns on the reverse rotation of the water and liquid nitrogen pumping unit to extract the separated water, so that the plugging pressure drops until the elastic fixing device is taken out, realizing the reuse of the elastic fixing device.

[0017] Preferably, the water and liquid nitrogen delivery pipeline is flexible and has low-temperature resistance, and its terminal is provided with micropores to provide a water source and a cold source for the nano-polymer resin.

[0018] The technical solution of the present invention also provides: a method for intelligently sealing holes of a reusable nano-polymer water-absorbing resin, which is applied to the intelligent hole-sealing system described in any one of the above, and includes the following steps:

[0019] Step 1: Design a hollow cylindrical elastic fixing device with corresponding dimensions according to engineering requirements;

[0020] Step 2: Assemble the elastic fixing device with the diversion casing and send them together into the target artificial drill hole;

[0021] Step 3: The temperature and pressure control unit generates temperature and pressure control instructions according to the preset plugging pressure and sends the instructions to the water and liquid nitrogen pumping unit;

[0022] Step 4: The water and liquid nitrogen pumping unit pumps water and liquid nitrogen into the water and liquid nitrogen delivery pipelines in the elastic fixing device in stages and according to requirements. At the same time, the temperature and pressure control unit continues to monitor and analyze the temperature and pressure data to determine whether the preset plugging pressure is reached and whether the current airtightness requirement can be met;

[0023] Step 5: If the preset plugging pressure is not reached or the airtightness requirement is not met, calculate the water delivery pressure through the decision port and send a pressure-increasing water delivery instruction to the water and liquid nitrogen pumping unit until the value of the electronic pressure gauge is stable and then stop pumping;

[0024] Step 6: When the elastic fixing device reaches the maximum water absorption capacity but still does not reach the plugging pressure, the decision port sends a liquid nitrogen pumping instruction to the water and liquid nitrogen pumping unit, and analyzes the temperature change and the plugging pressure value in the elastic fixing device in real time. When the plugging pressure is reached, stop pumping liquid nitrogen;

[0025] Step 7: During the operation of the intelligent plugging device, adjust the plugging pressure in a timely manner according to engineering requirements, and repeat the operations of Step 3 to Step 6;

[0026] Step 8: After the artificial drill hole completes the engineering requirements, the analysis port sends an instruction to the resistance heating circuit to turn on the controllable heating to promote water separation in the elastic fixing device. At the same time, turn on the reverse rotation of the water and liquid nitrogen pumping unit to extract the separated water. The plugging pressure drops, take out the elastic fixing device, and let it dry naturally in a sunny and ventilated place to achieve reuse.

[0027] Compared with the prior art, the present invention adopts the above technical solutions and has the following technical effects:

[0028] 1. The intelligent hole - sealing system of the nano - polymer water - absorbing resin of the present invention utilizes the extremely easy water - absorption and swelling characteristics of the nano - polymer resin, combines the characteristic that the volume expands again after being saturated with water and placed in a closed space and frozen by liquid nitrogen, and combines with an intelligent control system for real - time monitoring and analysis, which can greatly reduce costs and increase efficiency in borehole plugging.

[0029] 2. The intelligent hole - sealing system of the nano - polymer water - absorbing resin of the present invention uses nano - polymer resin materials, which have stable chemical properties, are non - toxic and harmless, and can be recycled and reused, having high environmental protection and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the structural block diagram of the intelligent hole - sealing system of the nano - polymer water - absorbing resin of the present invention;

[0031] Description of the reference numerals in the figure:

[0032] 1 - diversion casing; 2 - electronic pressure gauge; 3 - elastic fixing device; 4 - water and liquid nitrogen pumping unit; 5 - manual borehole; 6 - temperature and pressure control unit; 7 - delivery pipe; 8 - basic plugging unit; 9 - nano - polymer water - absorbing resin flexible adhesive board; 10 - elastic grid reinforcement film; 11 - resistance heating circuit; 12 - water and liquid nitrogen delivery pipeline; 13 - pressure sensor; 14 - temperature sensor; 15 - heating and temperature and pressure acquisition circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the application will be further elaborated in detail below with reference to the drawings. The described embodiments are only a part of the embodiments involved in the present invention. All non - innovative embodiments made by other researchers in the field based on this embodiment belong to the protection scope of the present invention. At the same time, for the step numbers in the embodiments of the present invention, they are only set for the convenience of elaboration and explanation, and no limitation is made on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0034] In one embodiment of the present invention, a reusable intelligent hole - sealing system of nano - polymer water - absorbing resin, as Figure 1 shown, includes a reusable nano - polymer water - absorbing resin device and an intelligent control device; the intelligent control device is connected to the nano - polymer water - absorbing resin device through a low - temperature - resistant pumping pipeline and a circuit for data acquisition and analysis.

[0035] The nano - polymer water - absorbing resin device includes: a diversion casing 1, an electronic pressure gauge 2, and an elastic fixing device 3; among them, the diversion casing 1 is high - pressure resistant, the electronic pressure gauge 2 has a data transmission function, and the elastic fixing device 3 is reusable and the material is nano - polymer water - absorbing resin.

[0036] The elastic fixing device 3 is composed of a basic plugging unit 8, and the basic plugging unit 8 is formed by elastically encapsulating and stacking a nano-polymer water-absorbing resin flexible adhesive plate 9, an elastic grid reinforcement film 10, a resistance heating circuit 11, and water and liquid nitrogen delivery pipes 12 in sequence from top to bottom.

[0037] Among them, the nano-polymer water-absorbing resin flexible adhesive plate 9 and the elastic grid reinforcement film 10 are used for fixing the resin, and when the resin absorbs water and swells, the elastic grid reinforcement film 10 deforms and adheres closely.

[0038] The water and liquid nitrogen delivery pipes 12 are provided with micropores. The water and liquid nitrogen delivery pipes 12 have good flexibility and low-temperature resistance characteristics, and the micropores can provide a high-flow water source and cold source for the nano-polymer resin.

[0039] The basic plugging unit 8 is arranged as Figure 1 shown to form a hollow cylindrical device with different inner and outer diameters (the inner and outer diameters are set according to engineering needs, and the side surface of the cylinder is stitched and encapsulated with an elastic material to the basic unit.

[0040] Furthermore, to reduce costs, in the four basic plugging units 8 distributed on the mutually perpendicular diameters of the hollow cylinder, a data acquisition circuit is also arranged inside the resistance heating circuit 11, which is connected to a data acquisition terminal, and the data acquisition circuit is arranged overlapping with the resistance heating circuit. The data acquisition terminal is hermetically and insulatingly encapsulated, and includes a pressure sensor 13 and a temperature sensor 14. The pressure sensor 13 and the temperature sensor 14 can withstand low temperatures, and the resistance heating circuit 11 can control the temperature to promote the resin to release the absorbed water, achieving the reusable of the resin.

[0041] The electronic pressure gauge 2 is arranged at the end of the diversion casing 1. The diversion casing 1 is nested in the elastic fixing device 3. After the elastic fixing device 3 and the casing 1 with the electronic pressure gauge 2 are nested and assembled, they are sent into the artificial borehole 5 together.

[0042] Furthermore, the intelligent control device includes: a water and liquid nitrogen pumping unit 4, a temperature and pressure control unit 6; the rear end of the water and liquid nitrogen pumping unit 4 is connected to the water and liquid nitrogen delivery pipes 12 through a transport pipe 7; the rear end of the temperature and pressure control unit 6 is connected to the resistance heating circuit 11 through a heating and temperature and pressure acquisition circuit 15, and the temperature and pressure control unit 6 is also connected to the electronic pressure gauge 2.

[0043] The temperature and pressure control unit 6 includes a preset parameter port, a decision-making port, and a control port. The temperature and pressure control unit 6 sets the final plugging pressure and temperature through the preset parameter port, and in real time collects the data of the pressure sensor 13, the temperature sensor 14 in the resistance heating circuit 11, and the electronic pressure gauge 2. Through the decision-making port, it analyzes and judges, generates relevant control instructions, and sends the instructions to the water and liquid nitrogen pumping control system 4 through the circuit of the control port. Through the transport pipe 7 and the connected water and liquid nitrogen transport pipeline 12 with micropores, it adjusts the pressure and temperature in the plugging device until the preset value is reached.

[0044] During use, the above-mentioned nano-polymer water-absorbing resin intelligent hole-sealing system is used for drilling hole sealing, and the method is as follows:

[0045] First, according to the engineering requirements and the size of the artificial drilling hole 5 to be sealed, a hollow cylindrical elastic fixing device 3 with a suitable size is designed, and the elastic fixing device 3 and the diversion casing 1 are assembled together and sent into the target artificial drilling hole 5.

[0046] Then, start the temperature and pressure control unit 6, preset the plugging pressure to the preset parameter port of the temperature and pressure control unit 6, and through the decision-making port, generate temperature and pressure control instructions according to the preset plugging pressure, and send the instructions to the water and liquid nitrogen pumping unit 4 through the control port.

[0047] The water and liquid nitrogen pumping unit 4 pumps water and liquid nitrogen into the water and liquid nitrogen transport pipeline 12 in the elastic fixing device 3 in stages and according to requirements. At the same time, the temperature and pressure control unit 6 continues to monitor and analyze the real-time temperature and pressure data to judge whether the preset plugging pressure is reached and whether the airtightness requirement can be met currently.

[0048] If the preset plugging pressure is not reached or the airtightness requirement is not met, then the temperature and pressure control unit 6 calculates the water conveyance pressure through the decision-making port, sends a pressure-increasing water conveyance instruction to the water and liquid nitrogen pumping unit 4, and after the value of the electronic pressure gauge 2 is stable, sends a stop instruction to stop pumping.

[0049] In view of the fact that the basic plugging unit 8 in the elastic fixing device 3 is composed of nano-polymer resin, and the nano-polymer resin has a maximum water absorption capacity (calculated and fed back by the decision-making port of the temperature and pressure control unit 6), if it is found that the plugging pressure is still not reached when the elastic fixing device 3 reaches the maximum water absorption capacity, then the decision-making port of the temperature and pressure control unit 6 sends a liquid nitrogen pumping instruction to the water and liquid nitrogen pumping unit 4, and analyzes in real time whether the temperature change and the plugging pressure value in the elastic fixing device 3 meet the standards, and stops liquid nitrogen pumping when the plugging pressure is reached.

[0050] During the operation of the intelligent plugging device, the plugging pressure can be adjusted in a timely manner according to the engineering requirements. Repeat the above operations until the hole sealing of the artificial borehole 5 is completed to ensure high tightness.

[0051] Finally, after the artificial borehole 5 has completed its engineering mission, the control port of the temperature and pressure control unit 6 sends an instruction to the resistance heating circuit 11 in the elastic fixing device 3 through the circuit to start controllable heating (to prevent the decomposition of overheated resin), promote the water separation of the elastic fixing device 3, and at the same time start the reverse rotation of the water and liquid nitrogen pumping control system 4 to extract the separated water. The plugging pressure will then decrease. When the elastic fixing device 3 can be removed, stop heating and reverse pumping, remove the elastic fixing device 3 and the diversion casing 1, and let them dry naturally in a sunny and ventilated place for reuse.

[0052] In summary, the intelligent hole sealing system and method of a reusable nano-polymer water-absorbing resin provided by the present invention utilize the extremely water-absorbing and swelling characteristics of the nano-polymer resin, combined with the characteristic that the volume expands again when saturated with water and placed in a closed space and frozen by liquid nitrogen, and combined with an intelligent control system for real-time monitoring and analysis, which can greatly reduce costs and increase efficiency in borehole plugging. Moreover, the nano-polymer resin used in the present invention has stable chemical properties, is non-toxic and harmless, and can be recycled and reused, having high environmental protection and economic benefits.

[0053] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A reusable nano polymer water-absorbing resin intelligent sealing system, characterized in that: include: Nano polymer water-absorbing resin device, intelligent control device; The nano polymer water-absorbing resin device is reusable and comprises: a flow guide sleeve (1), an electronic pressure gauge (2), and an elastic fixing device (3); The elastic fixing device (3) is formed by arranging the basic plugging units (8); the basic plugging unit (8) is formed from top to bottom by a superimposed elastic package of a nano polymer water-absorbing resin flexible adhesive plate (9), an elastic grid reinforcement film (10), a resistance heating circuit (11), and a water and liquid nitrogen delivery pipeline (12); the electronic pressure gauge (2) is arranged at the end of the guide sleeve (1), and the guide sleeve (1) is nested in the elastic fixing device (3) and is sent into the artificial borehole (5) together with the elastic fixing device (3); The intelligent control device comprises: a water and liquid nitrogen pumping unit (4), a temperature and pressure control unit (6); The water and liquid nitrogen pumping unit (4) is connected to the water and liquid nitrogen delivery pipeline (12) via a delivery pipe (7); the temperature and pressure control unit (6) is connected to the resistance heating circuit (11) via a heating and temperature and pressure acquisition circuit (15).

2. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 1 is characterized in that: The elastic fixing device (3) is in the shape of a hollow cylinder, the flow guide sleeve (1) is nested in the middle circular hole of the elastic fixing device (3), and the side surface of the hollow cylinder is sutured and packaged with the basic plugging unit (8) through elastic material.

3. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 1, characterized in that: The material of the elastic fixing device (3) is nano polymer water-absorbing resin; the nano polymer water-absorbing resin flexible adhesive plate (9) and the elastic grid reinforcement film (10) are used to fix the resin; when the resin absorbs water and expands, the elastic grid reinforcement film (10) is deformed and closely adheres to the artificial drilled hole (5).

4. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 1, characterized in that: In the four basic plugging units (8) distributed on mutually perpendicular diameters of the hollow cylinder, a data acquisition circuit is also overlappedly arranged inside the resistance heating circuit (11) and connected to the data acquisition terminal; The data acquisition terminal is a sealed and insulated package, comprising a pressure sensor (13) and a temperature sensor (14); the temperature and pressure control unit (6) acquires data from the pressure sensor (13) and the temperature sensor (14) through a heating and temperature and pressure acquisition circuit (15).

5. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 4, characterized in that: The pressure sensor (13) and the temperature sensor (14) are resistant to low temperatures; the resistance heating circuit (11) promotes the resin to release absorbed moisture through heating temperature control.

6. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 5, characterized in that: The temperature and pressure control unit (6) comprises a preset parameter port, a decision port, and a control port, and is also connected to an electronic pressure gauge (2); the preset parameter port presets the plugging pressure and temperature values, and collects data from a pressure sensor (13) and a temperature sensor (14); the decision port is used to perform data analysis and adjust the plugging pressure according to demand, and generate a control instruction; the control port transmits the control instruction to the water and liquid nitrogen pumping unit (4) through a circuit, and transmits it to the water and liquid nitrogen delivery pipeline (12) through a delivery pipe (7), so as to adjust the pressure and temperature in the basic plugging unit (8).

7. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 6, characterized in that: When the plugging pressure is insufficient or fails to meet the airtightness requirement, the decision port sends a command to the water and liquid nitrogen pumping unit (4), and the elastic fixing device (3) absorbs water and expands by water delivery to reach the set plugging pressure, and stops pumping after the value of the monitoring electronic pressure gauge (2) stabilizes; when a greater plugging pressure is required and the water delivery cannot meet the requirement, the decision port sends a command to the water and liquid nitrogen pumping unit (4), and the elastic fixing device (3) freezes and expands by pumping liquid nitrogen, while increasing the plugging pressure to ensure high sealing performance.

8. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 7, characterized in that: The temperature and pressure control unit (6) also sends a heating instruction to the resistance heating circuit (11) through the control port, controls the basic plugging unit (8) to precipitate water, and starts the water and liquid nitrogen pumping unit (4) to reverse, extracts the precipitated water, and reduces the plugging pressure until the elastic fixing device (3) is taken out, thereby realizing the reuse of the elastic fixing device (3).

9. The reusable nano polymer water-absorbing resin intelligent sealing system according to claim 1, characterized in that: The water and liquid nitrogen delivery pipeline (12) has flexibility and low temperature resistance, and has micropores at the terminal to provide a water source and a cold source for the nano polymer resin.

10. A reusable nano polymer water-absorbing resin intelligent sealing method, applied to the intelligent sealing system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Design a hollow cylindrical elastic fixing device (3) of corresponding size according to engineering requirements; Step 2, assembling the elastic fixing device (3) and the guide sleeve (1), and inserting them together into the target artificial borehole (5); Step 3, the temperature and pressure control unit (6) generates temperature and pressure control instructions according to the preset plugging pressure, and sends the instructions to the water and liquid nitrogen pumping unit (4); Step 4: The water and liquid nitrogen pumping unit (4) pumps water and liquid nitrogen into the water and liquid nitrogen delivery pipeline (12) in the elastic fixing device (3) in stages and according to demand, while the temperature and pressure control unit (6) continues to monitor and analyze the temperature and pressure data to determine whether the preset plugging pressure has been reached and whether the airtightness requirement can be met at present; Step 5: If the preset plugging pressure is not reached or the airtightness requirement is not met, the water delivery pressure is calculated through the decision port, and a pressure increase and water delivery instruction is sent to the water and liquid nitrogen pumping unit (4), and pumping is stopped after the value of the electronic pressure gauge (2) stabilizes; Step 6: When the elastic fixing device (3) reaches the maximum water absorption but has not yet reached the plugging pressure, the decision port sends a liquid nitrogen pumping instruction to the water and liquid nitrogen pumping unit (4), and analyzes the temperature change in the elastic fixing device (3) and the plugging pressure value in real time, and stops the liquid nitrogen pumping when the plugging pressure is reached; Step 7: During the operation of the intelligent plugging device, timely adjust the plugging pressure according to the engineering requirements, and repeat steps 3 to 6; Step 8: After the manual drilling (5) completes the engineering requirements, the analysis port sends a command to the resistance heating circuit (11) to start the controllable heating to promote the water extraction of the elastic fixing device (3). At the same time, the water and liquid nitrogen pumping unit (4) is turned on and reversed to extract the precipitated water. The sealing pressure is reduced, and the elastic fixing device (3) is taken out and placed in a sunny and ventilated place to dry naturally for reuse.

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