Orifice sealing device for drilling construction

Abstract

The embodiment of the utility model discloses an orifice sealing device for drilling construction, relates to the technical field of coal mine gas control, and can effectively improve the sealing effect of an orifice during drilling construction. The device comprises a body, a sealing cover, a first sealing piece and a first pipe fitting, wherein the body is provided with a separation cavity, and a first hole body, a second hole body, a third hole body and a fourth hole body which are communicated with the separation cavity; the sealing cover is connected to the first hole body, a blocking cavity is formed between the sealing cover and the body, and the first sealing piece is arranged in the blocking cavity; the first end of the first pipe fitting is configured to be adaptively connected with the second hole body; the sealing cover, the first sealing piece, the first hole body, the separation cavity, the second hole body and the first pipe fitting form a penetrating channel, and a drill rod can penetrate through the penetrating channel. The method is suitable for rock drift crossing drilling and underground bedding drilling construction scenes.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine gas control, and in particular to a hole sealing device used in drilling construction. Background Art

[0002] my country's coal mines are gradually entering the deep mining stage. Under the combined effects of ground stress and coal seam gas pressure, the probability of accidents such as dynamic disasters and coal and gas outbursts has increased significantly. In order to prevent the occurrence of coal and gas outburst accidents, rock tunnels are arranged at a certain distance directly below the coal seam, and upward through-layer drilling is constructed in the rock tunnel to pre-extract the gas from the overlying coal seam, so as to eliminate or reduce the danger of coal and gas outbursts in the excavation range in advance.

[0003] During the drilling construction, drilling blowout often occurs due to the combined effects of gas pressure and ground stress. When blowout occurs, a large amount of high-concentration gas mixed with coal particles is ejected from the hole, which on the one hand causes the gas concentration in the tunnel to exceed the limit within a certain range on the downwind side of the drilling construction point, and on the other hand, high-speed dust particles may injure workers. Since drilling blowout occurs suddenly and quickly, it is difficult to predict in advance. Therefore, effectively preventing gas blowout from exceeding the limit during the drilling process is a difficult problem that needs to be overcome urgently to ensure safe and efficient production in coal mines.

[0004] At present, the orifice anti-blowout device used in the drilling construction site is mainly composed of an orifice sealing device, a gas-water-slag separation device, etc. In the process of drilling construction, in order to improve the slag removal efficiency, a triangular drill rod is often used. The two ends of the triangular drill rod are cylindrical, and the middle is a triangular prism. During the drilling process, the drill rod rotates while moving axially along the center line of the drill rod, so the sealed drill rod needs to have a variable cross-section. When the hole is sprayed, the pressure in the hole suddenly increases, and coal dust containing gas is sprayed out from the gap between the drill rod and the sealing ring, causing gas to exceed the limit or injure people. In addition, the connection between the orifice sealing device and the borehole is prone to failure due to the uneven surface of the rock wall and the shaking of the drill rod during drilling, resulting in poor orifice sealing effect and affecting drilling construction. Utility Model Content

[0005] In order to solve the problem of poor hole sealing effect during existing drilling construction, the present application provides a hole sealing device for drilling construction.

[0006] In a first aspect, an embodiment of the present invention provides a hole sealing device for drilling construction, comprising: a main body, the main body being provided with a separation chamber, and a first hole body, a second hole body, a third hole body, and a fourth hole body connected to the separation chamber; a sealing cover, the sealing cover being connected to the first hole body and forming a blocking chamber with the main body; a first sealing member, the first sealing member being arranged in the blocking chamber; a first pipe fitting, the first end of the first pipe fitting being configured to be adaptably connected to the second hole body; wherein the sealing cover, the first sealing member, the first hole body, the separation chamber, the second hole body, and the first pipe fitting form a through passage through which a drill rod can be passed.

[0007] In a specific embodiment, the sealing cover includes a first annular body, a second annular body and a third annular body, the middle portion of the first annular body is penetrated to pass the drill rod, the outer edge of the first annular body on the side facing the first sealing member is connected to the starting end of the second annular body, the starting end of the second annular body extends axially to form the terminal end of the second annular body, the starting end of the third annular body is connected to the terminal end of the second annular body, the starting end of the third annular body extends radially inward to form the terminal end of the third annular body, a groove is formed between the third annular body and the first annular body, and the first hole body is provided with a flange adapted to the groove.

[0008] In a specific embodiment, the sealing cover is a split structure along the circumferential direction, including a first split body and a second split body, the first split body and the second split body are respectively provided with a rotating hole at one end and a positioning hole at the other end, and the orifice sealing device is configured on the first hole body with a rotating seat hole and a rotating pin corresponding to the rotating hole, and a positioning seat hole and a positioning pin corresponding to the positioning hole.

[0009] In a specific embodiment, the second hole body includes a second hole body outer tube and a second hole body inner tube, the second hole body inner tube is axially located inside the second hole body outer tube, a second hole body embedding cavity is formed between the second hole body outer tube and the second hole body inner tube, a tube wall of the second hole body outer tube is provided with a second hole body threaded hole and a second hole body bolt matched with the second hole body threaded hole, and the first end of the first pipe fitting is provided with a first pipe fitting groove along the circumference of the outer wall of the first pipe fitting.

[0010] In a specific embodiment, the first seal is an arc-shaped structure with an opening, the inner edge of the arc-shaped structure of the first seal is formed with a special-shaped hole for passing the drill rod, and the opening extends radially inward from the outer edge of the arc-shaped structure of the first seal to intersect with the special-shaped hole.

[0011] In a specific embodiment, the arc-shaped structure of the first sealing member is provided with an arc-shaped elastic member along the circumferential direction.

[0012] In a specific embodiment, the orifice sealing device is provided with at least two of the first sealing members, the two first sealing members are staggered at a preset angle along the circumferential direction, and are axially stacked in the blocking cavity.

[0013] In a specific embodiment, the second end of the first tube extends toward the first end of the first tube to form a tapered section with a gradually increasing outer diameter.

[0014] In a specific embodiment, the orifice sealing device also includes: a second pipe member, the first end of the second pipe member is configured to be adaptably connected to the second hole body, the first end of the second pipe member is provided with a first end groove along the circumference of the outer wall of the second pipe member, and the second end of the second pipe member is provided with a second end groove along the circumference of the outer wall of the second pipe member; a connecting member, the connecting member is a tubular structure, the first end of the connecting member includes a first end outer tube and a first end inner tube, the first end inner tube is axially located in the first end outer tube, and a first end embedding cavity is formed between the first end outer tube and the first end inner tube; the second end of the connecting member includes a second end outer tube and a second end inner tube, the second end inner tube is axially located in the second end outer tube, and a second end embedding cavity is formed between the second end outer tube and the second end inner tube, the first end of the connecting member is configured to be adaptably connected to the first end of the first pipe member, and the second end of the connecting member is configured to be adaptably connected to the second end of the second pipe member;

[0015] Wherein, the tube wall of the first end outer tube is provided with a first end threaded hole and a first end bolt matching with the first end threaded hole, and the tube wall of the second end outer tube is provided with a second end threaded hole and a second end bolt matching with the second end threaded hole; or, the tube wall of the first end outer tube is provided with a first end wall hole, and the tube wall of the second end outer tube is provided with a second end wall hole, and the connecting piece also includes a clamping hoop, and the clamping hoop includes an arc body, a handle, a buckle, and a hook, one end of the handle is hinged to the first end of the arc body, the hook is connected to the second end of the arc body, the first end of the buckle is hinged to the handle, and a convex column is provided on the inner side of the arc body; the clamping hoop is configured as follows: when the handle and the arc body are at a first hinge angle, the second end of the buckle can be detached from the hook, and when the handle and the arc body are at a second hinge angle, the second end of the buckle can be hung on the hook.

[0016] In a specific embodiment, the third hole is located below the separation chamber, and the fourth hole is located above the third hole.

[0017] In a specific embodiment, the orifice sealing device further comprises a second sealing member, wherein the second sealing member is disposed on a side of the sealing cover facing away from the first sealing member, and the second sealing member is configured to penetrate the drill pipe.

[0018] In a specific embodiment, the second sealing member is a split structure along the circumferential direction, including a first sealing split body and a second sealing split body, wherein the first sealing split body is connected to the first split body of the sealing cover, and the second sealing split body is connected to the second split body of the sealing cover.

[0019] In a second aspect, an embodiment of the present invention further provides a method for sealing a borehole during drilling construction, comprising: constructing a borehole of a preset depth; inserting a first pipe fitting of a borehole sealing device into the borehole, wherein the borehole sealing device is any of the borehole sealing devices described in the embodiments of the present application; connecting the second hole body of the borehole sealing device to the first end of the first pipe fitting near the borehole; or, connecting the second hole body of the borehole sealing device to the first end of the second pipe fitting, and connecting the second end of the second pipe fitting to the first end of the first pipe fitting near the borehole through a connecting piece, wherein the connecting piece and the second pipe fitting are respectively any of the connecting piece and the second pipe fitting described in the embodiments of the present application; connecting the third hole body of the borehole sealing device to a slag removal device; connecting the fourth hole body of the borehole sealing device to a negative pressure extraction pipeline; inserting a drill rod into a through channel formed by the sealing cover, the first sealing piece, the first hole body, the separation chamber, the second hole body, and the first pipe fitting to perform drilling construction.

[0020] The embodiment of the present invention provides a hole sealing device for drilling construction, comprising: a main body, a sealing cover, a first sealing member, and a first pipe fitting, wherein the main body is provided with a separation chamber, and a first hole body, a second hole body, a third hole body, and a fourth hole body connected to the separation chamber; the sealing cover is connected to the first hole body and forms a blocking chamber with the main body, and the first sealing member is arranged in the blocking chamber; the first end of the first pipe fitting is configured to be adaptably connected to the second hole body; the sealing cover, the first sealing member, the first hole body, the separation chamber, the second hole body, and the first pipe fitting form a through channel through which a drill rod can be passed, so that a power output end for drilling construction can be constructed through the second hole body, and at the same time the first hole body is blocked and shielded to prevent substances generated during construction from being discharged from the first hole body, and solid and liquid substances are exported through the third hole body, and gaseous substances are exported through the fourth hole body, thereby effectively improving the sealing effect of the hole during drilling construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a hole sealing device for drilling construction provided in an embodiment of the present application;

[0023] Figure 2 A three-dimensional schematic diagram of a hole sealing device for drilling construction provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of the orifice sealing device body provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the split structure of the sealing cover provided in an embodiment of the present application;

[0026] Figure 5 A three-dimensional schematic diagram of a first sealing member provided in an embodiment of the present application;

[0027] Figure 6 A front view of a first sealing member provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of two first sealing members provided in an embodiment of the present application penetrating a drill pipe;

[0029] Figure 8 A schematic cross-sectional view of a first pipe provided in an embodiment of the present application;

[0030] Fig. 9 A schematic cross-sectional view of a second pipe provided in an embodiment of the present application;

[0031] Fig.10 A schematic cross-sectional view of a connector provided in an embodiment of the present application;

[0032] Fig.11 A schematic diagram of the installation of the connecting piece, the first pipe piece, and the second pipe piece provided in an embodiment of the present application;

[0033] Fig.12 A schematic diagram of another connecting member provided in an embodiment of the present application;

[0034] Fig.13 A schematic diagram of a clamping hoop provided in an embodiment of the present application at a first hinge angle;

[0035] Fig.14A schematic diagram of a clamping hoop provided in an embodiment of the present application at a second hinge angle;

[0036] Fig.15 A schematic diagram of the installation of another connecting member, a first pipe member, and a second pipe member provided in an embodiment of the present application;

[0037] Fig.16 A schematic diagram of the assembly of the orifice sealing device and the drill pipe provided in an embodiment of the present application.

[0038] Description of main reference numerals:

[0039] 1-hole sealing device; 11-body; 110-separation chamber; 111-first hole body; 1110-blocking chamber; 1111-flange; 1112-rotation seat hole; 1113-positioning seat hole; 112-second hole body; 1121-second hole body outer tube; 1122-second hole body inner tube; 1123-second hole body embedded cavity; 1124-second hole body threaded hole; 113-third hole body; 114-fourth hole body; 12-sealing cover; 120-slot; 121-rotation hole; 122-positioning hole; 13-first sealing member; 131-special-shaped hole; 132-opening; 133-arc elastic member; 13a-first sealing member 1; 13b-first sealing member 2; 14-second sealing member; 15-first pipe fitting; 151-first pipe fitting groove; 152-conical section; 16-second pipe fitting; 161-first end groove; 162-second end groove; 17-connecting member; 171-first end outer tube; 1711-first end threaded hole; 1712-first end wall hole; 172-first end inner tube; 173-first end embedded cavity; 174-second end outer tube; 1741-second end threaded hole; 1742-second end wall hole; 175-second end inner tube; 176-second end embedded cavity; 177-clamping hoop; 1771-arc body; 1772-handle; 1773-buckle; 1774-hook; 1775-convex column; 2-drill rod. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] During the construction of through-layer drilling, the phenomenon of drilling blowout often occurs due to the combined effect of gas pressure and ground stress. In order to improve the sealing effect of the hole during the existing drilling construction, firstly, Figure 1As shown, an embodiment of the present invention provides a hole sealing device 1 for drilling construction, which may include: a body 11, a sealing cover 12, a first sealing member 13, and a first pipe member 15.

[0043] The body 11 is provided with a separation chamber 110, and a first hole body 111, a second hole body 112, a third hole body 113, and a fourth hole body 114 connected to the separation chamber 110; through this structural design, Figure 1 , Figure 2 As shown, the first hole 111 and the second hole 112 can be used to penetrate and arrange a power device such as a drill rod 2, and the substances generated during construction can be introduced into the separation chamber 110, and then the solid and liquid substances can be exported through the third hole 113, and the gaseous substances can be exported through the fourth hole 114. A handle can be provided on the outside of the body 11 for easy transportation and installation. The specific shapes and positions of the first hole 111, the second hole 112, the third hole 113, and the fourth hole 114 can be designed according to the adaptability of the connected components to meet the corresponding functional requirements.

[0044] The sealing cover 12 is connected to the first hole 111 and forms a blocking cavity 1110 between the main body 11. Figure 2 , Figure 3 As shown, the first sealing member 13 is arranged in the blocking cavity 1110 to form a blocking shield for the first hole body 111. In this way, it is possible to prevent substances generated during construction from being discharged from the first hole body 111 and affecting the power device and operators on the construction side. The sealing cover 12 and the first hole body 111 can be connected by detachable parts such as bolts; in the blocking cavity 1110, the sealing cover 12 and the main body 11 can respectively form axial blocking structures on both sides of the first sealing body. For example, on the opposite side of the main body 11 and the first sealing body, the main body 11 can be provided with a hole structure with an inner diameter smaller than the outer diameter of the first sealing body, and the hole structure connects the separation cavity 110 and the first hole body 111. On the opposite side of the sealing cover 12 and the first sealing body, the sealing cover 12 can be formed with a blocking end face for the first sealing body, thereby respectively constituting an axial limit for the first sealing member 13.

[0045] The first end of the first pipe 15 is configured to be adaptably connected to the second hole body 112, wherein the sealing cover 12, the first sealing member 13, the first hole body 111, the separation chamber 110, the second hole body 112, and the first pipe 15 form a through channel through which the drill rod 2 can be passed, thereby forming a power output channel for drilling construction.

[0046] The hole sealing device 1 for drilling construction provided by an embodiment of the present invention comprises: a body 11, a sealing cover 12, a first sealing member 13, and a first pipe 15, wherein the body 11 is provided with a separation chamber 110, and a first hole body 111, a second hole body 112, a third hole body 113, and a fourth hole body 114 connected to the separation chamber 110; the sealing cover 12 is connected to the first hole body 111 and forms a blocking chamber 1110 with the body 11, and the first sealing member 13 is arranged in the blocking chamber 1110; the first end of the first pipe 15 is configured to be connected to the first hole body 111, and the second hole body 112, the third hole body 113, and the fourth hole body 114 are ...; the first sealing member 13 is arranged in the blocking chamber 1110; the first end of the first pipe 15 is configured to be connected to the first hole body 111, and the second hole body 112, the third hole body 113, and the fourth hole body 114 are connected to the separation chamber 110; the sealing cover 12 is connected to the first hole body 111, and the second hole body 112, the third hole body 113, and the fourth hole body 114 The two hole bodies 112 are adaptively connected; the sealing cover 12, the first sealing member 13, the first hole body 111, the separation chamber 110, the second hole body 112, and the first pipe fitting 15 form a through channel through which the drill rod 2 can be passed, so that the power output end of the drilling construction can be constructed through the second hole body 112, and at the same time, the first hole body 111 is blocked and shielded to prevent the substances generated by the construction from being discharged from the first hole body 111, and the solid and liquid substances are exported through the third hole body 113, and the gaseous substances are exported through the fourth hole body 114, thereby effectively improving the sealing effect of the hole mouth during drilling construction.

[0047] In order to further improve the connection reliability and assembly convenience between the sealing cover 12 and the first hole body 111, optionally, in one embodiment of the present invention, the sealing cover 12 includes a first annular body, a second annular body and a third annular body, the middle part of the first annular body is penetrated to pass the drill rod 2, the first annular body is connected to the starting end of the second annular body at the outer edge of the side facing the first sealing member 13, the starting end of the second annular body extends axially to form the terminal end of the second annular body, the starting end of the third annular body is connected to the terminal end of the second annular body, and the starting end of the third annular body is connected to the third annular body. The terminal of the third annular body is formed by radially extending inward, and a slot 120 is formed between the third annular body and the first annular body. The first hole body 111 is provided with a flange 1111 adapted to the slot 120; when the sealing cover 12 is an integrated structure, the flange 1111 can be an arc-shaped structure along the circumference of the first hole body 111, and when the sealing cover 12 is a split structure, the flange 1111 can also be a circular ring-shaped structure along the circumference of the first hole body 111, and can be specifically arranged adaptively according to the matching connection mode between the sealing cover 12 and the first hole body 111. When in use, the slot 120 of the sealing cover 12 can be snapped onto the flange 1111 of the first hole body 111, and a through hole is opened on the flange 1111 and a through hole is opened at a corresponding position of the first annular body, and the connection is achieved by bolts.

[0048] Considering that drill bits with different outer diameters may be used during drilling construction, when drill bits with different outer diameters are used to penetrate the sealing cover 12, it is necessary for the middle portion of the first annular body of the sealing cover 12 to have a through structure with a matching size for easy penetration. Therefore, optionally, in one embodiment of the present invention, the sealing cover 12 is a split structure along the circumferential direction, including a first split body and a second split body, such as Figure 4As shown, the first split body and the second split body are each provided with a rotation hole 121 at one end and a positioning hole 122 at the other end. Figure 3 As shown, the hole sealing device 1 is provided with a rotating seat hole 1112 and a rotating pin corresponding to the rotating hole 121, and a positioning seat hole 1113 and a positioning pin corresponding to the positioning hole 122 on the first hole body 111. In this way, the ends of the first and second sub-bodies provided with the rotating hole 121 can be rotatably connected with the rotating seat hole 1112 provided on the first hole body 111 by respectively passing through rotating pins. When a drill bit with a larger outer diameter needs to be installed, the first and second sub-bodies are respectively rotated around the ends provided with the rotating hole 121 to open to a suitable angle to facilitate passing through the drill bit with a larger outer diameter. When the drill bit and the drill rod 2 are installed in place, the first and second sub-bodies can be respectively rotated around the ends provided with the rotating hole 121 to the positions corresponding to the positioning hole 122 and the positioning seat hole 1113, and positioning pins are passed through the positioning holes 122 and the positioning seat hole 1113 to achieve positioning and stopping.

[0049] Optionally, in one embodiment of the present invention, the orifice sealing device 1 further comprises a second sealing member 14, which is disposed on a side of the sealing cover 12 away from the first sealing member 13, and the second sealing member 14 is configured to be able to penetrate the drill rod 2. The second sealing member 14 is disposed on a side of the sealing cover 12 away from the first sealing member 13, and can further shield and seal the drill rod 2 penetrating the first hole body 111 on a side located outside the blocking cavity 1110, thereby preventing the gaseous, liquid or solid substances in the separation cavity 110 from leaking to the outside.

[0050] In addition, the second sealing member 14 can also be set as a split structure along the circumferential direction, including a first sealing split and a second sealing split, the first sealing split is connected to the first split of the sealing cover 12, and the second sealing split is connected to the second split of the sealing cover 12, so as to facilitate the assembly and installation with the various splits of the sealing cover 12.

[0051] The second hole body 112 and the first end of the first pipe member 15 can be connected through an existing detachable structure such as a quick-release joint. Optionally, in one embodiment of the present invention, a more secure and reliable connection method suitable for a mining construction environment is provided: Figure 1As shown, the second hole body 112 includes a second hole body outer tube 1121 and a second hole body inner tube 1122, the second hole body inner tube 1122 is axially located inside the second hole body outer tube 1121, a second hole body embedding cavity 1123 is formed between the second hole body outer tube 1121 and the second hole body inner tube 1122, the tube wall of the second hole body outer tube 1121 is provided with a second hole body threaded hole 1124 and a second hole body bolt matched with the second hole body threaded hole 1124, and the first end of the first pipe member 15 is provided with a first pipe member groove 151 along the circumferential direction of the outer wall of the first pipe member 15. In this way, the first end of the first pipe member 15 can be sleeved in the second hole body embedding cavity 1123, and by tightening the second hole body bolt matched with the second hole body threaded hole 1124, the end of the second hole body bolt is abutted against the first pipe member groove 151, thereby forming axial and radial limit for the first pipe member 15. In this embodiment, the tube wall of the second hole body outer tube 1121 can be circumferentially provided with a plurality of second hole body threaded holes 1124 and matching second hole body bolts to form a stable and reliable connection between the second hole body 112 and the first pipe fitting 15 .

[0052] When installing the drill rod 2, if the size of the first seal 13 corresponding to the portion through which the drill rod 2 is penetrated is small, it will block and affect the passage of the structural portion of the drill rod 2 with a larger cross-section, such as the cylindrical surface at both ends of the drill rod 2 or the drill bit, and if the size of the first seal 13 corresponding to the portion through which the drill rod 2 is penetrated is large, more construction products will leak to the outside. To solve this problem, optionally, in one embodiment of the present invention, Figure 5 , Figure 6 As shown, the first seal 13 is an arc-shaped structure with an opening 132. The inner edge of the arc-shaped structure of the first seal 13 is formed with a special-shaped hole 131 for passing the drill rod 2. The opening 132 extends radially inward from the outer edge of the arc-shaped structure of the first seal 13 to intersect with the special-shaped hole 131. The first seal 13 can be made of elastic materials such as flame-retardant, anti-static, wear-resistant rubber, etc. The shape of the special-shaped hole 131 can be adapted to the shape of the drill rod 2. For example, when a triangular drill rod 2 is used, the special-shaped hole 131 can be triangular, and the top angle of the triangle transitions in an arc shape to adapt to the cross-sectional profile of the triangular drill rod 2; the opening 132 can be in a Y-shaped structure, extending radially inward from the outer edge of the arc-shaped structure of the first seal 13 and intersecting with the special-shaped hole 131. In this way, Figure 7 As shown, when the drill rod 2 passes through the special-shaped hole 131 of the first sealing member 13, due to the existence of the opening 132, the arc-shaped structure of the first sealing member 13 can be stretched at the opening 132, so as to facilitate the passage of the drill rod 2. After the drill rod 2 is put into place, under the action of elasticity, the first sealing member 13 can return to its original state and be in close contact with the outer wall of the drill rod 2, thereby forming an effective seal.

[0053] To improve the ability of the first sealing member 13 to restore to its original state, optionally, in one embodiment of the present invention, Figure 5 , Figure 6 As shown, the arc-shaped structure of the first seal 13 is provided with an arc-shaped elastic member 133 along the circumferential direction. For example, a C-shaped spring ring made of spring wire or spring sheet is installed inside the first seal 13, thereby further enhancing the ability of the first seal 13 to restore its original shape after passing through the drill rod 2.

[0054] To further improve the sealing capability, optionally, in one embodiment of the present invention, as Figure 1 , Figure 7 As shown, the orifice sealing device 1 is provided with at least two first sealing members 13, which are staggered at a preset angle along the circumferential direction and are stacked axially in the blocking cavity 1110. When in use, the two first sealing members 13 can be used in pairs, such as Figure 7 The first seal 13a and the first seal 13b are stacked together along the circumferential direction at a preset angle, for example, 120 degrees apart, and axially stacked in the blocking cavity 1110. In this way, a more effective blocking effect can be formed along the axial direction. During the construction process, the two first seals 13 can rotate together with the drill pipe 2, and under the action of the axial blocking structures respectively formed by the sealing cover 12 and the body 11, the two first seals 13 are axially limited and will not move axially with the drill pipe 2.

[0055] In order to facilitate the installation of the first pipe member 15 in the construction borehole and reduce the insertion resistance, optionally, in one embodiment of the present invention, as Figure 8 As shown, the second end of the first pipe fitting 15 extends toward the first end of the first pipe fitting 15 to form a conical section 152 with a gradually increasing outer diameter. In this way, the outer wall of the first pipe fitting 15 can be closely fitted with the wall of the borehole, so that the gap between the two is fully sealed to prevent the drilling cuttings, liquid, gas generated during the construction process from leaking therefrom. The first pipe fitting 15 is used to receive drilling cuttings, flushing liquid, gas, etc., and guide the drilling cuttings, flushing liquid, gas, etc. to pass through the first pipe fitting 15 and enter the orifice sealing device 1. At the same time, it can also play a role in positioning and fixing the orifice sealing device 1. In this example, the first pipe fitting 15 can be made of polyethylene pipe (also known as PE pipe) to facilitate the passage of power components such as the drill bit and the drill rod 2.

[0056] After the hole is opened, if the hole is basically intact and neat, and there is no pipe, cable or other object at the hole that affects the installation of the hole sealing device 1 at the hole, the first pipe 15 can be directly connected to the hole sealing device 1. However, considering that after the hole is opened, if the rock at the hole is relatively broken, the hole is affected by other objects such as pipes, or the hole is opened far away, it is difficult to establish a reliable connection with the hole sealing device 1 using only the first pipe 15. Therefore, optionally, in one embodiment of the present invention, Fig. 9 , Fig.10 As shown, the orifice sealing device 1 further includes: a second pipe 16, the first end of the second pipe 16 is configured to be adaptably connected to the second hole body 112, the first end of the second pipe 16 is provided with a first end groove 161 along the circumference of the outer wall of the second pipe 16, and the second end of the second pipe 16 is provided with a second end groove 162 along the circumference of the outer wall of the second pipe 16; a connecting member 17, the connecting member 17 is a tubular structure, the first end of the connecting member 17 includes a first end outer tube 171 and a first end inner tube 172, the first end inner tube 172 is axially located at the first end outer tube 171. 1, a first end embedding cavity 173 is formed between the first end outer tube 171 and the first end inner tube 172; the second end of the connecting member 17 includes a second end outer tube 174 and a second end inner tube 175, the second end inner tube 175 is axially located inside the second end outer tube 174, and a second end embedding cavity 176 is formed between the second end outer tube 174 and the second end inner tube 175, the first end of the connecting member 17 is configured to be adaptably connected to the first end of the first pipe member 15, and the second end of the connecting member 17 is configured to be adaptably connected to the second end of the second pipe member 16; wherein, Fig.10 , Fig.11 As shown, the tube wall of the first end outer tube 171 is provided with a first end threaded hole 1711 and a first end bolt matching the first end threaded hole 1711 , and the tube wall of the second end outer tube 174 is provided with a second end threaded hole 1741 and a second end bolt matching the second end threaded hole 1741 .

[0057] or, as Fig.12 As shown, the tube wall of the first end outer tube 171 is provided with a first end wall hole 1712, the tube wall of the second end outer tube 174 is provided with a second end wall hole 1742, and the connecting member 17 further includes a clamping hoop 177, as shown in FIG. Fig.13 , Fig.14As shown, the clamping hoop 177 includes an arc body 1771, a handle 1772, a buckle 1773, and a hook 1774. One end of the handle 1772 is hinged to the first end of the arc body 1771, the hook 1774 is connected to the second end of the arc body 1771, the first end of the buckle 1773 is hinged to the handle 1772, and a convex column 1775 is provided on the inner side of the arc body 1771; the clamping hoop 177 is configured as follows: when the handle 1772 and the arc body 1771 are at a first hinge angle, the second end of the buckle 1773 can be detached from the hook 1774, and when the handle 1772 and the arc body 1771 are at a second hinge angle, the second end of the buckle 1773 can be hung on the hook 1774.

[0058] In this way, when the rock at the hole is relatively broken, the hole is affected by other objects such as pipes, or the hole opening distance is far, Fig.11 As shown, the first end of the first pipe member 15 can be sleeved in the first end embedding cavity 173 of the connecting member 17, and the first end bolt and the first end threaded hole 1711 are screwed together to make the end of the first end bolt abut against and press against the first pipe member groove 151, thereby forming axial and radial limitations on the first end of the first pipe member 15, and firmly connecting the first pipe member 15 and the connecting member 17; the second end of the second pipe member 16 is sleeved in the second end embedding cavity 176 of the connecting member 17, and the second end bolt and the second end threaded hole 1741 are screwed together to make the end of the second end bolt abut against and press against the second end groove 161 of the second pipe member 16. 2, thereby forming axial and radial limits on the second end of the second pipe fitting 16, and firmly connecting the second pipe fitting 16 and the connecting piece 17; the first end of the second pipe fitting 16 is sleeved in the second hole body embedding cavity 1123, and by tightening the second hole body bolt matched with the second hole body threaded hole 1124, the end of the second hole body bolt is abutted against the first end groove 161 of the second pipe fitting 16, thereby forming axial and radial limits on the first end of the second pipe fitting 16, and firmly connecting the second pipe fitting 16 and the second hole body 112, constructing a construction scheme of the orifice sealing device 1, avoiding the influence of orifice rock crushing, pipeline debris or long opening distance.

[0059] The above solution realizes the connection between the pipes by setting threaded holes and matching bolts on the corresponding pipe walls of the connecting piece 17. Another connection solution given in the above application can also be adopted, such as Fig.15As shown, by providing a first end wall hole 1712 on the tube wall of the first end outer tube 171 of the connecting member 17, and providing a second end wall hole 1742 on the tube wall of the second end outer tube 174, the handle 1772 of the clamping hoop 177 and the arc body 1771 are used to rotate the second end of the buckle 1773 to the position of the hook 1774 at the first hinge angle, and then the handle 1772 is pressed, so that the handle 1772 and the arc body 1771 are at the second hinge angle, and the second end of the buckle 1773 and the hook 1774 are connected. 4 is firmly hung, and the arc 1771 has a clamping force on the surrounding connector 17, the convex column 1775 on the inner side of the arc 1771 of the clamping hoop 177 is embedded in the first end wall hole 1712 or the second end wall hole 1742, and the end of the convex column 1775 abuts against the first pipe groove 151 or the second end groove 162 of the second pipe 16, thereby forming axial and radial limits on the first end of the first pipe 15 or the second end of the second pipe 16, and firmly connecting the first pipe 15 or the second pipe 16. In addition, a wall hole of the second hole body outer tube 1121 can also be opened in the tube wall of the second hole body outer tube 1121, and the second hole body 112 is firmly connected to the first end of the first tube body by the clamping hoop 177, or the second hole body 112 is firmly connected to the first end of the second tube body. In order to facilitate assembly and connection, the arc 1771 of the clamping hoop 177 can also adopt a split structure along the circumferential direction.

[0060] Optionally, in one embodiment of the present invention, the third hole 113 is located below the separation chamber 110, and the fourth hole 114 is located above the third hole 113. The third hole 113 may be located below the separation chamber 110 to facilitate the extraction of solid and liquid substances, and the fourth hole 114 may be located above the third hole 113 to facilitate the extraction of gaseous substances.

[0061] In a second aspect, an embodiment of the present invention further provides a method for sealing a hole opening during drilling construction, which can effectively improve the sealing effect of the hole opening during drilling construction.

[0062] The orifice sealing method comprises: constructing a borehole of a preset depth; inserting a first pipe member 15 of an orifice sealing device 1 into the borehole, wherein the orifice sealing device 1 is any of the orifice sealing devices 1 in the embodiments of the present application; connecting a second hole body 112 of the orifice sealing device 1 to a first end of the first pipe member 15 near the borehole orifice; or connecting the second hole body 112 of the orifice sealing device 1 to a first end of a second pipe member 16, and connecting the second end of the second pipe member 16 to the first pipe member 16 near the borehole orifice through a connecting member 17. The first end of 15 is connected, wherein the connecting piece 17 and the second pipe fitting 16 are respectively the connecting piece 17 and the second pipe fitting 16 of any one of the embodiments of the present application; the third hole body 113 of the orifice sealing device 1 is connected to the slag discharge equipment; the fourth hole body 114 of the orifice sealing device 1 is connected to the negative pressure extraction pipeline; the drill rod 2 is inserted into the through channel formed by the sealing cover 12, the first sealing piece 13, the first hole body 111, the separation chamber 110, the second hole body 112, and the first pipe fitting 15 to carry out drilling construction.

[0063] In the above method, if the borehole opening is basically intact and neat, and there are no pipes, cables or other objects that affect the installation of the borehole sealing device 1 in close contact with the borehole opening, the first pipe fitting 15 can be directly connected to the borehole sealing device 1 to carry out drilling construction; if the rock at the borehole opening is relatively broken, there are other objects such as pipes that affect it, or the through-layer drilling opening is far away, it can be further extended and connected by the second pipe fitting 16 and the connecting piece 17, such as Fig.16 As shown, the adaptability and applicability of the orifice sealing device 1 to working conditions are improved. During the drilling process, the drill cuttings, flushing fluid, and gas generated are guided by the first pipe 15 through the second hole body 112 into the separation chamber 110 of the main body 11, and solid and liquid substances such as drill cuttings and flushing fluid are discharged through the third hole body 113 connected to the slag discharge equipment, and gaseous substances such as gas are discharged through the fourth hole body 114 connected to the negative pressure extraction pipeline. The joint part where the third hole body 113 is connected to the slag discharge equipment and the joint part where the fourth hole body 114 is connected to the negative pressure extraction pipeline can be designed as a barb joint with an inverted sawtooth structure to prevent slipping.

[0064] Therefore, the hole sealing method for drilling construction provided by the embodiment of the present invention comprises: a body 11, a sealing cover 12, a first sealing member 13, and a first pipe 15, wherein the body 11 is provided with a separation chamber 110, and a first hole body 111, a second hole body 112, a third hole body 113, and a fourth hole body 114 connected to the separation chamber 110; the sealing cover 12 is connected to the first hole body 111 and forms a blocking chamber 1110 with the body 11, and the first sealing member 13 is arranged in the blocking chamber 1110; the first end of the first pipe 15 is configured to be The second hole body 112 is adaptively connected; the sealing cover 12, the first sealing member 13, the first hole body 111, the separation chamber 110, the second hole body 112, and the first pipe fitting 15 form a through channel for the drill rod 2 to pass through, so that the power output end of the drilling construction can be constructed through the second hole body 112, and at the same time, the first hole body 111 is blocked and shielded to prevent the substances generated during the construction from being discharged from the first hole body 111, and the solid and liquid substances are exported through the third hole body 113, and the gaseous substances are exported through the fourth hole body 114, thereby effectively improving the sealing effect of the hole mouth during drilling construction.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0067] In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hole sealing device for drilling construction, characterized in that: include: A body, wherein the body is provided with a separation chamber, and a first hole body, a second hole body, a third hole body, and a fourth hole body connected to the separation chamber; A sealing cover, the sealing cover is connected to the first hole body and forms a blocking cavity between the body; A first sealing member, wherein the first sealing member is disposed in the blocking cavity; A first pipe, wherein a first end of the first pipe is configured to be adaptably connected to the second hole body; The sealing cover, the first sealing member, the first hole body, the separation chamber, the second hole body, and the first pipe member form a through passage through which a drill rod can be passed.

2. The hole sealing device for drilling construction according to claim 1, characterized in that: The sealing cover includes a first annular body, a second annular body and a third annular body. The middle part of the first annular body is penetrated to pass the drill rod. The outer edge of the first annular body on the side facing the first sealing member is connected to the starting end of the second annular body. The starting end of the second annular body extends axially to form the terminal end of the second annular body. The starting end of the third annular body is connected to the terminal end of the second annular body. The starting end of the third annular body extends radially inward to form the terminal end of the third annular body. A groove is formed between the third annular body and the first annular body, and the first hole body is provided with a flange adapted to the groove.

3. The hole sealing device for drilling construction according to claim 1, characterized in that: The sealing cover is a split structure along the circumferential direction, including a first split body and a second split body, wherein the first split body and the second split body are respectively provided with a rotating hole at one end and a positioning hole at the other end, and the orifice sealing device is provided with a rotating seat hole and a rotating pin corresponding to the rotating hole, and a positioning seat hole and a positioning pin corresponding to the positioning hole on the first hole body.

4. The hole sealing device for drilling construction according to claim 1, characterized in that: The second hole body includes a second hole body outer tube and a second hole body inner tube, the second hole body inner tube is axially located inside the second hole body outer tube, a second hole body embedding cavity is formed between the second hole body outer tube and the second hole body inner tube, a tube wall of the second hole body outer tube is provided with a second hole body threaded hole and a second hole body bolt matching with the second hole body threaded hole, and a first end of the first pipe fitting is provided with a first pipe fitting groove along the circumference of the outer wall of the first pipe fitting.

5. The hole sealing device for drilling construction according to claim 1, characterized in that: The first seal is an arc-shaped structure with an opening, and an inner edge of the arc-shaped structure of the first seal is formed with a special-shaped hole for passing the drill rod, and the opening extends radially inward from the outer edge of the arc-shaped structure of the first seal and intersects with the special-shaped hole.

6. The hole sealing device for drilling construction according to claim 5, characterized in that: The arc-shaped structure of the first sealing member is provided with an arc-shaped elastic member along the circumferential direction.

7. The hole sealing device for drilling construction according to claim 1, characterized in that: At least two of the first sealing members are provided, and the two first sealing members are staggered at a preset angle along the circumferential direction and are stacked in the blocking cavity along the axial direction.

8. The hole sealing device for drilling construction according to claim 1, characterized in that: The second end of the first pipe member extends toward the first end of the first pipe member to form a conical section with a gradually increasing outer diameter.

9. The hole sealing device for drilling construction according to claim 1, characterized in that: Also includes: A second pipe, wherein the first end of the second pipe is configured to be adaptably connected to the second hole, the first end of the second pipe is provided with a first end groove along the circumference of the outer wall of the second pipe, and the second end of the second pipe is provided with a second end groove along the circumference of the outer wall of the second pipe; A connecting piece, wherein the connecting piece is a tubular structure, wherein the first end of the connecting piece comprises a first end outer tube and a first end inner tube, wherein the first end inner tube is axially located inside the first end outer tube, and a first end embedding cavity is formed between the first end outer tube and the first end inner tube; the second end of the connecting piece comprises a second end outer tube and a second end inner tube, wherein the second end inner tube is axially located inside the second end outer tube, and a second end embedding cavity is formed between the second end outer tube and the second end inner tube, wherein the first end of the connecting piece is configured to be adaptably connected to the first end of the first tube, and the second end of the connecting piece is configured to be adaptably connected to the second end of the second tube; Wherein, the tube wall of the first end outer tube is provided with a first end threaded hole and a first end bolt matched with the first end threaded hole, and the tube wall of the second end outer tube is provided with a second end threaded hole and a second end bolt matched with the second end threaded hole; or, The tube wall of the outer tube at the first end is provided with a first end wall hole, the tube wall of the outer tube at the second end is provided with a second end wall hole, the connecting piece also includes a clamping hoop, the clamping hoop includes an arc body, a handle, a buckle, and a hook, one end of the handle is hinged to the first end of the arc body, the hook is connected to the second end of the arc body, the first end of the buckle is hinged to the handle, and a convex column is provided on the inner side of the arc body; the clamping hoop is configured as follows: when the handle and the arc body are at a first hinge angle, the second end of the buckle can be detached from the hook, and when the handle and the arc body are at a second hinge angle, the second end of the buckle can be hung on the hook.

10. The hole sealing device for drilling construction according to claim 1, characterized in that: The third hole is located below the separation chamber, and the fourth hole is located above the third hole.

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