Device and method for rapidly isolating and reinforcing fractured stratum based on deep drilling lining repair

Abstract

The invention relates to the technical field of fractured stratum reinforcement, in particular to a fractured stratum rapid isolating and reinforcing device and method based on deep drilling lining repair. The device comprises drilling equipment, a double-film lining structure, an electric inflator pump, an ultraviolet curing piece and a controller. The double-membrane lining structure comprises an outer hose and an inner membrane tube; the outer hose is made of glass fiber reinforced thermoplastic plastics, the inner film pipe is arranged outside the drill rod in a sleeving mode, and the two ends of the inner film pipe are fixed to the drill rod in a sealed mode. The length of the outer hose is smaller than that of the inner film in the pipe, the outer hose adheres to the middle end of the inner film pipe through hot melt adhesive, an air guide opening is formed in the end, away from the drill bit, of the inner film pipe, and the inflator pump is communicated with the air guide opening through an air guide pipe. And the ultraviolet curing piece is arranged on the outer wall of the drill rod in the inner membrane tube. According to the device, the outer hose is tightly attached to the hole wall, then ultraviolet rays can be evenly irradiated to the outer hose through the ultraviolet emitter, rapid and complete curing of the outer hose is achieved, and the efficiency and safety of drilling operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of broken stratum reinforcement, and in particular to a device and method for quickly isolating and reinforcing broken strata based on deep borehole lining repair. Background Art

[0002] When deep boreholes encounter fractured formations, the traditional reinforcement method combines casing drilling with grouting. This involves gradually lowering casing during the drilling process to support the borehole walls, and then injecting grouting fluid into the gap between the borehole wall and the casing to reinforce the formation. This technology has limitations when dealing with deep boreholes. Casing installation in fractured formations is difficult, and the borehole walls are prone to collapse, resulting in a low drilling success rate. Grouting can be used for reinforcement, but the slurry easily loses, making it difficult to evenly distribute the reinforcement, thus failing to achieve the desired effect. Furthermore, this technology has high construction costs, a long operation cycle, significant environmental disturbance, and difficulty ensuring construction safety. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to propose a device and method for rapid isolation and reinforcement of broken strata based on deep borehole lining repair.

[0004] The first object of the present invention is to provide a device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, comprising a drilling device, a double-membrane lining structure, an electric air pump, a UV curing component, and a controller; The drilling equipment includes a drilling rig, a drill rod, and a drill bit, wherein the drilling rig is connected to the drill bit via the drill rod; The double-membrane lining structure includes an outer hose and an inner membrane tube; the outer hose is made of glass fiber reinforced thermoplastic plastic, and the inner membrane tube is made of high-elasticity polyurethane composite material. The inner membrane tube is sleeved outside the drill pipe, and its two ends are respectively sealed and fixed to the drill pipe; the length of the outer hose is shorter than the length of the inner membrane, and the outer hose is adhered to the middle end of the inner membrane tube by hot melt adhesive. An air guide port is provided at the end of the inner membrane tube away from the drill bit, and the air pump is connected to the air guide port through the air guide tube; The ultraviolet curing component comprises a plurality of ultraviolet emitters which are evenly spaced and arranged on the outer wall of the drill pipe located in the inner membrane tube; the ultraviolet emitters are electrically connected to the controller.

[0005] Furthermore, the superelastic polyurethane composite material has a tensile strength of ≥25 MPa and an elongation at break of ≥800%.

[0006] Furthermore, the wall thickness of the endometrial tube at both ends gradually becomes thinner along the axial direction toward the center.

[0007] Furthermore, the thickness of the endometrial tube is 1.5-2 mm at both ends and 0.8-1.2 mm in the middle.

[0008] Furthermore, a pressure sensor is provided on the air guide tube, and the controller is electrically connected to the pressure sensor and the air pump.

[0009] Furthermore, the hot melt adhesive has a thickness of 50-100 μm and an adhesion force of 0.1-0.5 N / cm².

[0010] Furthermore, both ends of the inner membrane tube are fixed to the drill pipe through a clamp connection structure.

[0011] Furthermore, the drill rod is provided with an ultraviolet intensity sensor, which is electrically connected to the controller.

[0012] Furthermore, the drill rod is provided with a temperature sensor which is electrically connected to the controller.

[0013] The second object of the present invention is to provide a method for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, using the above-mentioned device; the specific steps are as follows: S1. Drill a hole in a broken formation to a predetermined depth using drilling equipment. When the drill encounters a broken formation, stop drilling and drain the remaining drilling fluid from the hole. S2. Turn on the air pump and start to inflate the inner membrane tube. The generated gas gradually inflates the inner membrane tube, supporting the uniform expansion of the outer tube until the outer tube expands tightly to the inner wall of the borehole, achieving preliminary isolation of the broken formation. S3. The controller controls the ultraviolet emitter to irradiate the expanded outer hose to solidify it and soften the hot melt adhesive; S4. After the outer hose is completely solidified, open the air release valve of the air pump to quickly release the pressure from the inner membrane tube. After the pressure is released, the inner membrane tube shrinks. After the pressure is released, the drill pipe vibrates slightly to assist in the detachment of the inner membrane. The drill pipe can continue with subsequent operations or be pulled out of the well.

[0014] The present invention uses an air pump to uniformly expand the inner membrane tube in the borehole and make the outer hose tightly fit the hole wall. Then, a UV emitter is used to evenly irradiate ultraviolet rays onto the outer hose to achieve its rapid and complete curing, thereby improving the efficiency and safety of drilling operations and reducing drilling accidents and delays caused by broken formations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair according to the present invention; Figure 2 Schematic diagram of the double membrane lining structure; Figure 3 It is a structural diagram of the clamp connection structure.

[0016] 1-drilling equipment; 11-drill rod; 12-drill bit; 2-double-membrane lining structure; 21-outer hose; 22-inner membrane tube; 221-air guide port; 3-air pump; 4-UV curing component; 5-controller; 6-air guide tube; 7-clamp connection structure. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 As shown, the present invention is a device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, comprising a drilling device 1, a double-membrane lining structure 2, an air pump 3, a UV curing component 4, and a controller 5; The drilling equipment 1 includes a drilling rig (not shown in the figure), a drill rod 11, and a drill bit 12. The drilling rig is connected to the drill bit 12 via the drill rod 11; The double-membrane lining structure 2 includes an outer hose 21 and an inner membrane tube 22; the outer hose 21 is made of glass fiber reinforced thermoplastic plastic, and the inner membrane tube 22 is made of high-elasticity polyurethane composite material. The inner membrane tube 22 is sleeved on the outside of the drill pipe 11, and its two ends are respectively sealed and fixed to the drill pipe 11; the length of the outer hose 21 is less than the length of the inner membrane, and the outer hose 21 is adhered to the middle end of the inner membrane tube 22 by hot melt adhesive. The end of the inner membrane tube 22 away from the drill bit 12 is provided with an air guide port 221, and the air pump 3 is connected to the air guide port 221 through the air guide pipe 6; The UV curing member 4 includes a plurality of UV emitters, which are evenly spaced and arranged on the outer wall of the drill rod 11 located in the inner membrane tube 22 ; the UV emitters are electrically connected to the controller 5 .

[0019] The present invention uses an air pump 3 to uniformly expand the inner membrane tube 22 in the borehole and make the outer hose 21 fit tightly against the hole wall. Then, a UV emitter is used to uniformly irradiate ultraviolet rays onto the outer hose 21 to achieve rapid and complete curing, thereby improving the efficiency and safety of drilling operations and reducing drilling accidents and delays caused by broken formations.

[0020] The outer hose 21 is made of glass fiber-reinforced thermoplastic (such as polyester or polyethylene), specifically IN73-S11. When gas is introduced, the outer hose 21 rapidly expands to 2-3 times its original volume, conforming tightly to the borehole wall and withstanding long-term corrosion from media such as drilling fluid and groundwater. The outer hose 21 is shorter than the borehole depth, so that after expansion, both ends naturally align with the wellbore wall, preventing shrinkage. The inner membrane tube 22 is constructed from a hyperelastic polyurethane composite material with a tensile strength of ≥25 MPa and an elongation at break of ≥800%, ensuring no risk of localized tearing during long-distance expansion. The inner membrane wall thickness gradually varies axially, from 1.5 mm at each end to 1.0 mm in the middle. This compensates for stress concentration at the ends during inflation. The inner surface of the inner membrane tube 22 can be provided with spiral guide grooves to evenly distribute the gas. The inner membrane tube 22 can withstand the downhole environment of -40℃ to 120℃. The outer hose 21 is adhered to the middle end of the inner membrane tube 22 by low-viscosity hot melt adhesive. The thickness of the low-viscosity hot melt adhesive is 50-100μm, and the adhesion is controlled at 0.1-0.5N / cm² to ensure easy separation after deflation. The inner membrane tube 22 is longer than the outer hose 21. Both ends are fixed behind the drill bit 12 and can be connected by a clamp connection structure 7 (such as Figure 3 As shown) is fixed with the drill rod 11, as Figure 2 As shown, an air guide port 221 is provided at one end of the endothelial tube 22 away from the drill bit 12 , and can be connected to the air pump 3 via the air guide tube 6 in a sealed connection.

[0021] The air pump 3 is connected to the air port 221 of the inner membrane tube 22 via the air guide tube 6. A double seal (hot melt adhesive + elastic sealing ring) is used at the connection to prevent gas leakage. A manual rotary air release valve (external technology) is installed on the side of the air pump 3. When air is needed, the operator manually rotates the valve to release gas and manually controls the air release rate.

[0022] The ultraviolet emitter may be an ultraviolet lamp beam, which, upon receiving instructions from the controller 5 , can provide ultraviolet rays of sufficient intensity and appropriate wavelength to uniformly irradiate the expanded outer hose 21 to ensure its curing quality.

[0023] The airway tube 6 may be equipped with a pressure sensor (not shown). The controller 5 is electrically connected to the pressure sensor and the air pump 3. The controller 5 sends instructions to the air pump 3 and controls its operation based on preset gas pressure and flow parameters. Through the airway tube 6, the inner membrane tube 22 is uniformly expanded, and the outer hose 21 attached to the inner membrane tube 22 also expands uniformly until it achieves a tight fit with the inner wall of the borehole. During this process, the controller 5 adjusts the operating state of the air pump 3 based on pressure feedback from the pressure sensor and theoretical calculations to avoid over-inflation or under-inflation.

[0024] The drill rod 11 may also be provided with an ultraviolet intensity sensor (not shown in the figure), which is electrically connected to the controller 5. The ultraviolet intensity sensor is provided to monitor the ultraviolet light output intensity in real time to ensure that the curing energy meets the standard.

[0025] The drill rod 11 may also be provided with a temperature sensor (not shown in the figure), which is electrically connected to the controller 5 to monitor the surface temperature of the inner film tube 22 during the curing process to prevent overheating and material degradation.

[0026] The second object of the present invention is to provide a method for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, using the above-mentioned device; the specific steps are as follows: S1. Drill a hole in a broken stratum to a predetermined depth using a drilling device 1. When the drill encounters a broken stratum, stop drilling and remove the remaining drilling fluid in the hole. The judgment and implementation of this process are prior art.

[0027] S2. Turn on the air pump 3 and start to inflate the inner membrane tube 22. The generated gas gradually inflates the inner membrane tube 22 to support the uniform expansion of the outer hose 21 until the outer hose 21 expands to fit tightly against the inner wall of the borehole, achieving initial isolation of the broken formation. S3. The controller 5 controls the ultraviolet emitter to irradiate the expanded outer hose 21 to solidify it and soften the hot melt adhesive; S4. After the outer hose 21 is completely solidified, the air release valve of the air pump 3 is opened, and the inner membrane tube 22 is quickly depressurized. After the air is released, the inner membrane tube 22 shrinks. After the pressure is released, the drill pipe 11 can be lifted to vibrate slightly to assist in the detachment of the inner membrane. The drill pipe 11 can continue to perform subsequent operations or be lifted out of the well.

[0028] Any matters not mentioned above shall be subject to the existing technology.

[0029] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art of the present invention may make various modifications or additions to the described specific embodiments or replace them in similar ways, but they will not deviate from the direction of the present invention or exceed the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, characterized in that: Including drilling equipment, double membrane lining structure, electric air pump, UV curing parts, controller; The drilling equipment includes a drilling rig, a drill rod, and a drill bit, wherein the drilling rig is connected to the drill bit via the drill rod; The double-membrane lining structure includes an outer hose and an inner membrane tube; the outer hose is made of glass fiber reinforced thermoplastic plastic, and the inner membrane tube is made of high-elasticity polyurethane composite material. The inner membrane tube is sleeved outside the drill pipe, and its two ends are respectively sealed and fixed to the drill pipe; the length of the outer hose is shorter than the length of the inner membrane, and the outer hose is adhered to the middle end of the inner membrane tube by hot melt adhesive. An air guide port is provided at the end of the inner membrane tube away from the drill bit, and the air pump is connected to the air guide port through the air guide tube; The ultraviolet curing component comprises a plurality of ultraviolet emitters which are evenly spaced and arranged on the outer wall of the drill rod located in the inner membrane tube; the ultraviolet emitters are electrically connected to the controller.

2. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The superelastic polyurethane composite material has a tensile strength of ≥25 MPa and an elongation at break of ≥800%.

3. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The wall thickness of the two ends of the inner membrane tube gradually becomes thinner toward the center along the axial direction.

4. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 3, characterized in that: The thickness of the endometrial tube is 1.5-2 mm at both ends and 0.8-1.2 mm in the middle.

5. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The air guide tube is provided with a pressure sensor, and the controller is electrically connected to the pressure sensor and the air pump.

6. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The thickness of hot melt adhesive is 50-100μm, and the adhesion is 0.1-0.5N / cm².

7. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The two ends of the inner membrane tube are fixed to the drill rod through a clamp connection structure.

8. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The drill rod is also provided with an ultraviolet intensity sensor, which is electrically connected to the controller.

9. A device for rapid isolation and reinforcement of broken strata based on deep borehole lining repair as claimed in claim 1, characterized in that: The drill rod is also provided with a temperature sensor which is electrically connected to the controller.

10. A method for rapid isolation and reinforcement of broken strata based on deep borehole lining repair, characterized in that: The device according to any one of claims 1 to 9 is used; the specific steps are as follows: S1. Drill a hole in a broken formation to a predetermined depth using drilling equipment. When the drill encounters a broken formation, stop drilling and drain the remaining drilling fluid from the hole. S2. Turn on the air pump and start to inflate the inner membrane tube. The generated gas gradually inflates the inner membrane tube, supporting the uniform expansion of the outer tube until the outer tube expands tightly to the inner wall of the borehole, achieving preliminary isolation of the broken formation. S3. The controller controls the ultraviolet emitter to irradiate the expanded outer hose to solidify it and soften the hot melt adhesive; S4. After the outer hose is completely solidified, open the air release valve of the air pump to quickly release the pressure from the inner membrane tube. After the pressure is released, the inner membrane tube shrinks. After the pressure is released, the drill pipe vibrates slightly to assist in the detachment of the inner membrane. The drill pipe can continue with subsequent operations or be pulled out of the well.

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