Plugging device special for ultrasonic anti-reflection

Abstract

The utility model relates to the technical field of coal seam ultrasonic anti-reflection devices, and particularly discloses a plugging device special for ultrasonic anti-reflection, which comprises a sleeve, a plugging device, an ultrasonic anti-reflection device and an ultrasonic anti-reflection device, the plugging layer is filled between the outer wall surface of the sleeve and the inner wall surface of the drill hole; the air bag is sleeved on the drill rod; the pressurizing component drives the airbag to expand; the water injection assembly is used for injecting water into the drill hole; the ventilation channel is parallel to the axial direction of the sleeve and penetrates through the sleeve; the floating block can float on the water surface in the drill hole; the air hole is formed in the floating block in the vertical direction; the hose is connected with the lower end of the vent hole and one end of the vent channel close to the bottom of the drill hole; the plugging block is detachably mounted at the end, away from the hose, of the ventilation channel and can plug the ventilation channel; by means of the water injection device, in the water injection operation, air in a drill hole can be conveniently exhausted, the water injection efficiency in the ultrasonic anti-reflection operation is effectively guaranteed, and the ultrasonic anti-reflection quality can be effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrasonic permeability enhancement devices for coal seams, and in particular to a special sealing device for ultrasonic permeability enhancement. Background Technology

[0002] Ultrasonic (sound waves with a frequency higher than 20kHz) anti-reflection technology, as a type of physical field anti-reflection technology, has been widely used in conventional oil and gas production enhancement, coalbed methane reservoir modification and other fields.

[0003] For example, Chinese patent application number CN202223474624.6 discloses a horizontal drilling push rod displacement and permeability enhancement system for underground coal seams, including ultrasonically excited drilling, a sealing device, a drill rod, an ultrasonic transducer for the ultrasonically excited drilling installed on the drill rod, and a water supply device capable of injecting into the ultrasonically excited drilling; the sealing device includes a sleeve that can be fitted over the drill rod, the gap between the outer wall of the sleeve and the inner wall of the ultrasonically excited drilling is filled with sealing material, and an annular water-filled airbag is provided in the gap between the inner wall of the sleeve and the outer wall of the drill rod.

[0004] In the above technical solution, a water-filled airbag is installed between the casing and the drill pipe of the sealing device for sealing. The worker first uses the drilling system to drill an ultrasonically excited borehole in the underground coal seam; this ultrasonically excited borehole is a horizontal borehole. After the ultrasonically excited borehole is formed, the drilling rig remains stationary, and the ultrasonic transducer is installed on the drill pipe. The drill pipe with the ultrasonic transducer installed is then sent into the ultrasonically excited borehole using the drilling rig. Next, a water pipe is inserted into the bottom of the ultrasonically excited borehole, and then the opening of the ultrasonically excited borehole is plugged using the sealing device 20 to ensure that the ultrasonically excited borehole does not leak water. After the ultrasonically excited borehole is sealed, the water pump is started, the second valve is opened, and water is injected into the ultrasonically excited borehole to keep it full of water, providing a water bath environment for ultrasonic action.

[0005] However, in the above technical solution, the ultrasonic excitation drilling is a horizontal drilling, and the ultrasonic excitation drilling is sealed with a water-filled airbag before water is injected into it.

[0006] During the water injection process, the air inside the ultrasonically excited borehole is squeezed out by the water and has difficulty being expelled. It can only be expelled through the gaps between the soil, which reduces the water injection efficiency of ultrasonic excitation. When the water pressure is insufficient, it may not even be able to provide a complete water bath environment for ultrasonic action, affecting the quality of ultrasonic penetration enhancement. Utility Model Content

[0007] In view of the above problems, this utility model provides a special sealing device for ultrasonic anti-reflection, the purpose of which is to improve the efficiency of air removal from the borehole during water injection.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] An ultrasonic anti-reflection sealing device is provided, comprising: a cylindrical sleeve parallel to the borehole and installed inside the borehole; a sealing layer filling the space between the outer wall of the sleeve and the inner wall of the borehole; an air bladder inside the sleeve and fitted onto the drill rod; a pressurizing component for increasing pressure inside the air bladder, thereby causing the air bladder to expand and seal the space between the inner wall of the sleeve and the outer wall of the drill rod; a water injection component for injecting water into the borehole; a venting channel parallel to the axial direction of the sleeve and penetrating the sleeve; a float capable of floating on the water surface inside the borehole; a vent hole vertically formed inside the float; a flexible hose, one end of which is connected to the lower end of the vent hole, and the other end of which is connected to the end of the venting channel near the bottom of the borehole; and a sealing block detachably installed at the end of the venting channel away from the flexible hose, capable of sealing the venting channel.

[0010] Furthermore, the water injection assembly includes a water pump and a water injection pipe, one end of which is connected to the outlet of the water pump, and the other end of which extends through the sealing layer toward the interior of the borehole.

[0011] Furthermore, the plugging device also includes at least two support rods, installed parallel to the central axis of the sleeve, both positioned above the drill pipe, with the float resting on the two support rods.

[0012] Furthermore, the plug also includes an overlap groove, formed on the bottom side of the float, for placing a support rod.

[0013] Furthermore, the float is rectangular in shape.

[0014] Furthermore, the sealing block is detachably installed on the sleeve via a threaded connection.

[0015] The beneficial effects of this utility model are as follows: In this utility model, as the water level in the borehole rises, the air in the borehole is squeezed out through the vent and vent channel; in addition, the float can float on the water surface and rise in the borehole as the water level rises, preventing the upper end of the vent from being submerged by water, and further ensuring the efficiency of air discharge from the borehole.

[0016] By using this invention, air can be easily discharged from the borehole during water injection operations, effectively ensuring the water injection efficiency and quality of ultrasonic enhancement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall installation structure of the occluder provided in the embodiments of this application.

[0018] Figure 2 for Figure 1 Enlarged diagram of point A.

[0019] Figure 3 for Figure 1 Enlarged diagram of point B.

[0020] Figure 4 A side view of the sleeve provided in an embodiment of this application.

[0021] Among them, 1. Drill hole; 2. Sleeve; 21. Ventilation channel; 22. Sealing block; 3. Drill rod; 31. Airbag; 4. Sealing layer; 5. Float block; 51. Ventilation hole; 52. Support rod; 6. Hose; 71. Water pump; 72. Water injection fitting. Detailed Implementation

[0022] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0023] Reference Figure 1 , Figure 2 and Figure 3 As shown in the illustration, this application discloses a special sealing device for ultrasonic anti-reflection, comprising: a sleeve 2, cylindrical in shape, parallel to the borehole 1, installed inside the borehole 1; a sealing layer 4, filling the space between the outer wall of the sleeve 2 and the inner wall of the borehole 1; an airbag 31, located inside the sleeve 2 and fitted onto the drill rod 3; a pressurizing component, used to increase pressure inside the airbag 31, thereby causing the airbag 31 to expand and seal the space between the inner wall of the sleeve 2 and the outer wall of the drill rod 3; and a water injection component, used to inject water into the airbag. Water is injected into borehole 1; a venting channel 21 is parallel to the axial direction of sleeve 2 and passes through sleeve 2; a float 5 is able to float on the water surface inside borehole 1; a venting hole 51 is opened vertically inside float 5; a hose 6 is connected at one end to the lower end of venting hole 51 and at the other end to the end of venting channel 21 near the bottom of borehole 1; a sealing block 22 is detachably installed at the end of venting channel 21 away from hose 6 and can seal venting channel 21.

[0024] In practical use, before injecting water into borehole 1, the pressurizing component is activated first. The pressurizing component increases the pressure into airbag 31, and airbag 31 expands. Airbag 31 extends along the radial direction of borehole 1 until airbag 31 seals the outer wall surface of borehole 1 and the inner wall surface of sleeve 2.

[0025] Water is then injected into borehole 1 through the water injection component. As the water level in borehole 1 rises, the air in borehole 1 is squeezed out through the vent hole 51 and the vent channel 21. In addition, the float 5 can float on the water surface and rise in borehole 1 as the water level rises, preventing the upper end of the vent hole 51 from being submerged by water, and further ensuring the efficiency of air discharge in borehole 1.

[0026] Specifically, after completing the air removal work in borehole 1 and filling borehole 1 with water, the user can seal the ventilation channel 21 with the sealing block 22, and then the ultrasonic enhancement operation can be carried out.

[0027] It is worth mentioning that in this embodiment, the borehole 1 is opened horizontally; multiple transducers can be installed inside the drill rod 3, and the transducers can be connected to the ultrasonic generator via wires; the specific ultrasonic anti-reflection process is a well-known technology in the field, and will not be described in detail here.

[0028] By using this invention, air can be easily discharged from the borehole 1 during water injection operations, effectively ensuring the water injection efficiency and quality of ultrasonic enhancement.

[0029] Specifically, the water injection assembly includes a water pump 71 and a water injection pipe 72. One end of the water injection pipe 72 is connected to the outlet of the water pump 71, and the other end of the water injection pipe 72 extends through the sealing layer 4 toward the interior of the borehole 1.

[0030] In this embodiment, the pressurization component is also a water pump 71, and the air bag 31, the water injection pipe 72 and the water outlet of the water pump 71 are connected by a three-way valve.

[0031] It is worth mentioning that the airbag 31 is made of rubber and can be set on the outer wall of the drill rod 3 or on the inner wall of the sleeve 2.

[0032] It is worth mentioning that the sealing layer 4 can be concrete, which fills and seals the space between the outer wall of the sleeve 2 and the inner wall of the borehole 1.

[0033] Reference Figure 4 As shown, the plugging device also includes at least two support rods 52, which are installed parallel to the central axis of the sleeve 2 and are both positioned above the drill rod 3. The float 5 is placed on the two support rods 52.

[0034] By placing the float 5 on the support rod 52, in the initial state, the float 5 is above the drill rod 3, which facilitates the float 5 to float up and prevents the drill rod 3 from blocking the float 5.

[0035] Preferably, both the hose 6 and the float 5 can be made of plastic.

[0036] Preferably, the plugger further includes an overlap groove, which is formed on the bottom side of the float 5 for placing the support rod 52. The support rod 52 can be embedded in the overlap groove to improve the stability of the float 5.

[0037] Preferably, the float 5 is rectangular in shape, and the upper side of the float 5 is rectangular. The upper end of the vent 51 is connected to the upper side of the float 5. During the upward movement of the float 5, the two edges of the float 5 can be pressed against the inner wall of the borehole 1 to ensure that there is a fixed gap between the inner wall of the borehole 1 and the upper side of the float 5, so as to prevent the inner wall of the borehole 1 from blocking the vent 51 and to ensure the efficiency of air exhaust in the borehole 1.

[0038] Preferably, the sealing block 22 is detachably installed on the sleeve 2 via a threaded connection. A gasket can be added between the sealing block 22 and the venting channel 21, and the sealing performance of the venting channel 21 is improved by the sealing block 22 squeezing the gasket.

[0039] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they learn the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the machine equivalents of the claims of the present invention, the present invention also intends to include these modifications and modifications.

Claims

1. A special occluder for ultrasonic anti-reflection, characterized in that, The application relates to a sealing device for a drilling hole (1), comprising: a sleeve (2) in the shape of a cylinder, which is arranged in parallel to the drilling hole (1) and is arranged in the drilling hole (1); a sealing layer (4) arranged between the outer wall of the sleeve (2) and the inner wall of the drilling hole (1); an air bag (31) arranged in the sleeve (2) and sleeved on a drill rod (3); a pressurizing component for increasing the pressure in the air bag (31) so as to drive the air bag (31) to expand and seal the space between the inner wall of the sleeve (2) and the outer wall of the drill rod (3); a water injection assembly for injecting water into the drilling hole (1); an air passage (21) arranged in parallel to the axial direction of the sleeve (2) and penetrating the sleeve (2); a floating block (5) capable of floating on the water surface in the drilling hole (1); an air hole (51) arranged in the floating block (5) in the vertical direction; a hose (6) with one end connected to the lower end of the air hole (51) and the other end connected to one end of the air passage (21) close to the bottom of the drilling hole (1); a sealing block (22) detachably arranged at the end of the air passage (21) away from the hose (6) and capable of sealing the air passage (21).

2. The ultrasonic access-specific occluder of claim 1, wherein, The water injection assembly comprises a water pump (71) and a water injection pipe (72), one end of the water injection pipe (72) is connected to the water outlet of the water pump (71), and the other end of the water injection pipe (72) extends towards the inside of the drilling hole (1) through the sealing layer (4).

3. The ultrasonic access-specific occluder of claim 1, wherein, Further comprising: at least two supporting rods (52) arranged in parallel to the central axis of the sleeve (2) and arranged above the drill rod (3), and the floating block (5) is arranged on the two supporting rods (52).

4. The ultrasonic access-specific occluder of claim 3, wherein, Further comprising: a lap joint groove arranged on the bottom side of the floating block (5) and used for placing the supporting rod (52).

5. The ultrasonic access-specific occluder according to claim 4, characterized in that The floating block (5) is in the shape of a cuboid.

6. The ultrasonic access-specific occluder of claim 1, wherein, The sealing block (22) is detachably arranged on the sleeve (2) through threaded connection.

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