A blowout prevention controller for gas extraction in a hole

Abstract

The present invention discloses an in-hole gas extraction and blowout prevention controller, comprising a pipe body, a waterproof and slag-proof extraction port, a sealing disk and a pre-fixing mechanism, wherein one end of the pipe body is provided with a waterproof and slag-proof extraction port, and the other end is detachably connected to the sealing disk, a plurality of sieve holes are evenly opened on one end face of the waterproof and slag-proof extraction port, a gas extraction interface and a drainage slag interface are symmetrically provided on the outside of the pipe body, an in-hole extraction channel and a drainage and slag discharge channel are provided inside, and the pre-fixing mechanism is detachably installed on the outside of the pipe body. The present invention adopts a parallel double-channel form of an in-hole extraction channel and a drainage and slag discharge channel, so that a large amount of high-concentration gas buffered in the extraction hole flows through the in-hole extraction channel, and the water slag and residual gas in the extraction process are discharged from the drainage and slag discharge channel, thereby realizing the diversion of gas and water slag, so that a large amount of coal powder slag ejected from the borehole can be discharged smoothly and effectively, ensuring that the gas extraction channel is unobstructed.

Description

Technical Field

[0001] The present invention relates to the field of gas extraction equipment, and in particular to an in-hole gas extraction blowout prevention controller. Background Art

[0002] Coal mine gas accidents are one of the most serious natural disasters in mines. Currently, coal mine gas prevention work must adhere to the principle of "regional comprehensive gas prevention measures first, supplemented by local comprehensive gas prevention measures." However, the traditional "hole-hole extractor" is used for pre-extraction of coal seam gas drilling. These "hole-hole extractors" are made of 108mm diameter steel pipes. When used, the pipes are inserted deep into the hole for extraction. However, due to the limited space in the extraction channel, the unimpeded ejection of large amounts of coal dust and slag is restricted, making it impossible to drain and close the slag cycle. Consequently, the hole-hole extraction channel often becomes clogged, and the pressure in the hole increases sharply. This causes the ejected high-concentration gas to flow into the construction roadway, causing the roadway to exceed the limit and seriously threatening drilling safety. Therefore, we propose a hole-hole gas extraction and blowout prevention controller. Summary of the Invention

[0003] The main purpose of the present invention is to provide an in-hole gas extraction and blowout prevention controller. By setting an in-hole extraction channel and a water drainage and slag discharge channel, and setting a duckbill-shaped waterproof and slag prevention extraction port, a large amount of coal powder slag ejected from the borehole can be discharged smoothly and effectively, ensuring that the gas extraction channel is unobstructed, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A blowout prevention controller for in-hole gas extraction comprises a tube body for inserting into the extraction hole, a waterproof and slag-proof extraction port for extracting high-concentration gas in the extraction hole, a sealing disk for connecting a drill pipe, and a pre-fixing mechanism for fixing the tube body inserted into the extraction hole. The tube body is provided with a waterproof and slag-proof extraction port at one end, and is detachably connected to the sealing disk at the other end. A plurality of sieve holes for filtering water and coal slag in the gas are evenly arranged on one end face of the waterproof and slag-proof extraction port. A gas extraction interface and a drainage slag interface are symmetrically provided on the outside of the tube body. An in-hole extraction channel for gas extraction and a drainage and slag channel for discharging water and coal slag are provided inside the tube body. The gas extraction interface is connected to the in-hole extraction channel, and the drainage slag interface is connected to the drainage and slag channel. The pre-fixing mechanism is detachably mounted on the outside of the tube body.

[0006] Furthermore, the pre-fixing mechanism includes an expansion bladder tube, one end of the expansion bladder tube close to the sealing disk is connected to an oil injection pipe, and the other end is connected to a connecting oil channel. A lower clamping ring is provided on the outside of the oil injection pipe, and the inner side of the lower clamping ring is detachably connected to the tube body. An upper clamping ring is provided on the outside of the connecting oil channel, and the inner side of the upper clamping ring is detachably connected to the tube body. By injecting high-pressure liquid into the oil injection pipe, the volume of the expansion bladder tube is expanded and conflicts with the inner wall of the extraction hole, thereby realizing rapid fixation of the tube body.

[0007] Furthermore, the waterproof and slag-proof extraction port is arranged in a duckbill shape, the inner end face of which is a smooth arc surface, and the sieve hole is arranged at the inner end face of the waterproof and slag-proof extraction port. Since the gas in the extraction hole is in a high-pressure state, the duckbill-shaped waterproof and slag-proof extraction hole is conducive to the rapid flow of gas and has an anti-blocking effect. At the same time, the sieve hole can filter the water and coal slag in the gas.

[0008] Furthermore, the expansion bladder tubes are evenly distributed around the outside of the tube body. When the tube body becomes larger, the evenly distributed expansion bladder tubes can keep the tube body in the middle of the expansion bladder tube, preventing the tube body from tilting during insertion and fixation.

[0009] Furthermore, the connecting oil channel includes a base and a connecting part. The base is a hollow circular tube with closed ends, one end face of which is connected to the connecting part, and the other end of the connecting part is connected to the expansion bladder tube. The connecting part is hollow cylindrical. When high-pressure liquid is injected, the high-pressure liquid enters the base. After the base is filled with liquid, the liquid is evenly discharged into the interior of each expansion bladder tube through the connecting part, so that the expansion rate of the expansion bladder tube remains consistent, which is conducive to maintaining the stability of the tube body position.

[0010] Furthermore, the lower clamping ring and the upper clamping ring are both arranged in a circular shape, and the outer sides of the lower clamping ring and the upper clamping ring are provided with clamping grooves equal to the number of the expansion bag tube. The pre-fixing mechanism can be assembled and disassembled through the lower clamping ring and the upper clamping ring, which is convenient for timely adjustment according to actual usage conditions, thereby increasing the scope of application of the equipment.

[0011] Furthermore, the expansion bladder tube and the outer end surface are arranged in an arc shape, and the inner end surface is fitted with the tube body. This arrangement can prevent the expansion bladder tube from sliding during the process of volume increase, which is conducive to maintaining the stability of the tube body position.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) By adopting a parallel dual-channel form of an in-hole extraction channel and a water drainage and slag discharge channel, a large amount of high-concentration gas buffered in the extraction hole flows through the in-hole extraction channel, and the water slag and residual gas in the extraction process are discharged through the water drainage and slag discharge channel, realizing the diversion of gas and water slag, so that a large amount of coal powder slag ejected from the borehole can be discharged smoothly and effectively, ensuring the smooth flow of the gas extraction channel;

[0014] (2) By setting up a duckbill-shaped waterproof and slag-proof extraction port and a sieve-type air flow inlet, water and coal slag in the gas can be effectively filtered to prevent water and slag in the hole from entering the dedicated gas extraction channel;

[0015] (3) Through the pre-fixing mechanism, after the pipe body is inserted into the extraction hole, high-pressure liquid is injected into the expansion bag tube through the oil injection pipe, so that the expansion bag tube expands and presses against the inner wall of the extraction hole, which can quickly and stably fix the position of the pipe body, facilitate the subsequent sealing of the extraction hole, reduce the complexity and operation time of the sealing process, and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an in-hole gas extraction blowout prevention controller according to the present invention;

[0017] Figure 2 This is a front view of a blowout prevention controller for gas extraction in a hole according to the present invention;

[0018] Figure 3 This is a right side view of a blowout prevention controller for gas extraction in a hole according to the present invention;

[0019] Figure 4 for Figure 3 a sectional view of the middle section A;

[0020] Figure 5 for Figure 3 a sectional view of the middle section B;

[0021] Figure 6 for Figure 3 a sectional view of the middle section C;

[0022] Figure 7 This is a structural diagram of the connecting oil passage of a blowout prevention controller for in-hole gas extraction according to the present invention;

[0023] Figure 8 A top view of a connecting oil passage of a blowout preventer controller for gas extraction in a hole according to the present invention;

[0024] Figure 9 for Figure 8 a sectional view of the middle section D;

[0025] Figure 10This is a structural schematic diagram of a lower clamping ring of a blowout prevention controller for in-hole gas extraction according to the present invention;

[0026] Figure 11 The present invention is a structural schematic diagram of an upper clamping ring of an in-hole gas extraction blowout preventer controller.

[0027] In the figure: 1. Tube body; 2. Waterproof and slag-proof extraction port; 3. Sealing disk; 4. Pre-fixing mechanism; 41. Expansion bladder tube; 42. Oil injection pipeline; 43. Connecting oil channel; 431. Base; 432. Connecting part; 44. Lower clamping ring; 45. Upper clamping ring; 46. Clamping groove; 5. Sieve hole; 6. Gas extraction interface; 7. Drainage and slag interface; 8. In-hole extraction channel; 9. Drainage and slag channel. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and represent only schematic diagrams rather than actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0029] Example 1

[0030] like Figure 1-11 As shown, a borehole gas extraction and blowout prevention controller includes a pipe body 1, a waterproof and slag-proof extraction port 2, a sealing disk 3 and a pre-fixing mechanism 4. A waterproof and slag-proof extraction port 2 is provided at one end of the pipe body 1, and the other end is detachably connected to the sealing disk 3. A number of sieve holes 5 are evenly opened on one end face of the waterproof and slag-proof extraction port 2. A gas extraction interface 6 and a drainage slag interface 7 are symmetrically provided on the outside of the pipe body 1, and an borehole extraction channel 8 and a drainage slag channel 9 are provided inside. The gas extraction interface 6 is connected to the borehole extraction channel 8, and the drainage slag interface 7 is connected to the drainage slag channel 9. The pre-fixing mechanism 4 is detachably installed on the outside of the pipe body 1.

[0031] The pre-fixing mechanism 4 includes an expansion bladder tube 41, one end of the expansion bladder tube 41 close to the sealing disk 3 is connected to an oil injection pipe 42, and the other end is connected to a connecting oil channel 43. A lower clamping ring 44 is provided on the outside of the oil injection pipe 42, and the inner side of the lower clamping ring 44 is detachably connected to the tube body 1. An upper clamping ring 45 is provided on the outside of the connecting oil channel 43, and the inner side of the upper clamping ring 45 is detachably connected to the tube body 1.

[0032] The waterproof and slag-proof extraction port 2 is arranged in a duckbill shape, the inner end surface of which is a smooth arc surface, and the sieve hole 5 is arranged at the inner end surface of the waterproof and slag-proof extraction port 2.

[0033] The expansion bladder tubes 41 are evenly distributed around the outside of the tube body 1 .

[0034] The connecting oil passage 43 includes a base 431 and a connecting portion 432. The base 431 is a hollow circular tube with closed ends. One end face of the base 431 is connected to the connecting portion 432. The other end of the connecting portion 432 is connected to the expansion bag tube 41. The connecting portion 432 is a hollow cylindrical shape.

[0035] The lower snap ring 44 and the upper snap ring 45 are both annular in shape. The outer sides of the lower snap ring 44 and the upper snap ring 45 are each provided with snap grooves 46 having the same number as the expansion bladder tube 41 .

[0036] The expansion bladder tube 41 and the outer end surface are arranged in an arc shape, and the inner end surface is in contact with the tube body 1.

[0037] By adopting the above technical solution: when in use, the sealing disk 3 is inserted into the drill pipe, and then the pipe body 1 is sent into the borehole. After the pipe body 1 is inserted into the extraction hole, high-pressure liquid is injected into the expansion bag tube 41 through the oil injection pipe 42. After the expansion bag tube 41 is expanded, it is pressed against the inner wall of the extraction hole. After the position of the pipe body 1 is preliminarily fixed, the extraction hole is sealed with expansion cotton. During the extraction process, the duckbill-shaped waterproof and slag-proof extraction port 2 is provided with a sieve-type air flow inlet, which can effectively filter water and coal slag in the gas and prevent water and slag in the hole from entering the extraction channel 8 in the dedicated hole. Due to the parallel dual-channel form of the in-hole extraction channel 8 and the water drainage and slag discharge channel 9, a large amount of high-concentration gas buffered in the extraction hole flows through the in-hole extraction channel 8 to the gas extraction interface 6, and then enters the extraction hose of the blowout preventer and collector connected to the gas extraction interface 6. The water slag and residual gas in the extraction process are discharged through the water drainage and slag discharge channel 9 and enter the slag discharge hose of the blowout preventer and collector connected to the water drainage and slag interface 7, realizing the diversion of gas and water slag, so that a large amount of coal powder slag ejected from the borehole can be discharged smoothly and effectively, ensuring that the gas extraction channel is unobstructed.

[0038] Example 2

[0039] like Figure 1-11 As shown, a borehole gas extraction and blowout prevention controller includes a pipe body 1, a waterproof and slag-proof extraction port 2, a sealing disk 3 and a pre-fixing mechanism 4. A waterproof and slag-proof extraction port 2 is provided at one end of the pipe body 1, and the other end is detachably connected to the sealing disk 3. A number of sieve holes 5 are evenly opened on one end face of the waterproof and slag-proof extraction port 2. A gas extraction interface 6 and a drainage slag interface 7 are symmetrically provided on the outside of the pipe body 1, and an borehole extraction channel 8 and a drainage slag channel 9 are provided inside. The gas extraction interface 6 is connected to the borehole extraction channel 8, and the drainage slag interface 7 is connected to the drainage slag channel 9. The pre-fixing mechanism 4 is detachably installed on the outside of the pipe body 1.

[0040] The pre-fixing mechanism 4 includes an expansion bladder tube 41, one end of the expansion bladder tube 41 close to the sealing disk 3 is connected to an oil injection pipe 42, and the other end is connected to a connecting oil channel 43. A lower clamping ring 44 is provided on the outside of the oil injection pipe 42, and the inner side of the lower clamping ring 44 is detachably connected to the tube body 1. An upper clamping ring 45 is provided on the outside of the connecting oil channel 43, and the inner side of the upper clamping ring 45 is detachably connected to the tube body 1.

[0041] The waterproof and slag-proof extraction port 2 is arranged in a duckbill shape, the inner end surface of which is a smooth arc surface, and the sieve hole 5 is arranged at the inner end surface of the waterproof and slag-proof extraction port 2.

[0042] The expansion bladder tubes 41 are evenly distributed around the outside of the tube body 1 .

[0043] The connecting oil passage 43 includes a base 431 and a connecting portion 432. The base 431 is a hollow circular tube with closed ends. One end face of the base 431 is connected to the connecting portion 432. The other end of the connecting portion 432 is connected to the expansion bag tube 41. The connecting portion 432 is a hollow cylindrical shape.

[0044] The lower snap ring 44 and the upper snap ring 45 are both annular in shape. The outer sides of the lower snap ring 44 and the upper snap ring 45 are each provided with snap grooves 46 having the same number as the expansion bladder tube 41 .

[0045] By adopting the above technical solution: when in use, for extraction holes with different apertures, when the aperture of the extraction hole is larger, the number of expansion sac tubes 41 can be increased according to the size of the aperture, and the expansion sac tubes 41 should be evenly distributed around the outside of the tube body 1. When the expansion sac tube 41 is injected with high-pressure liquid, it expands outward and conflicts with the inner wall of the extraction hole to achieve stable fixation of the tube body 1, and then the extraction hole is sealed with expansion cotton. When the aperture of the extraction hole is small, the number of expansion sac tubes 41 can be reduced, and even the pre-fixing mechanism 4 can be removed, and the tube body 1 can be directly inserted into the extraction hole, and the extraction hole can be sealed with expansion cotton.

[0046] Example 3

[0047] like Figure 1-11 As shown, a borehole gas extraction and blowout prevention controller includes a pipe body 1, a waterproof and slag-proof extraction port 2, a sealing disk 3 and a pre-fixing mechanism 4. A waterproof and slag-proof extraction port 2 is provided at one end of the pipe body 1, and the other end is detachably connected to the sealing disk 3. A number of sieve holes 5 are evenly opened on one end face of the waterproof and slag-proof extraction port 2. A gas extraction interface 6 and a drainage slag interface 7 are symmetrically provided on the outside of the pipe body 1, and an borehole extraction channel 8 and a drainage slag channel 9 are provided inside. The gas extraction interface 6 is connected to the borehole extraction channel 8, and the drainage slag interface 7 is connected to the drainage slag channel 9. The pre-fixing mechanism 4 is detachably installed on the outside of the pipe body 1.

[0048] The waterproof and slag-proof extraction port 2 is arranged in a duckbill shape, the inner end surface of which is a smooth arc surface, and the sieve hole 5 is arranged at the inner end surface of the waterproof and slag-proof extraction port 2.

[0049] By adopting the above technical solution: after the pipe body 1 is inserted into the extraction hole, the gas extraction interface 6 should be kept on the upper side of the drainage slag interface 7. At this time, the waterproof and slag-proof extraction port 2 has a good filtering effect, which can allow the water and coal slag in the gas to flow into the drainage and slag channel 9. The gas is filtered through the sieve hole 5 and then flows into the extraction channel 8 in the hole, realizing the diversion of gas, water and coal slag, and preventing water and slag in the hole from entering the dedicated gas extraction channel 8. When the extraction hole is in a vertical state, keep the pipe body 1 in a vertical state and insert it into the extraction hole.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A blowout prevention controller for gas extraction in a hole, comprising a pipe body (1), a water-proof and slag-proof extraction port (2), a sealing disk (3) and a pre-fixing mechanism (4), characterized in that: The pipe body (1) is provided with a waterproof and slag-proof extraction port (2) at one end, and is detachably connected to a sealing disk (3) at the other end. A plurality of sieve holes (5) are evenly provided on one end face of the waterproof and slag-proof extraction port (2). A gas extraction interface (6) and a drainage slag interface (7) are symmetrically provided on the outside of the pipe body (1), and an in-hole extraction channel (8) and a drainage slag channel (9) are provided inside. The gas extraction interface (6) is connected to the in-hole extraction channel (8), and the drainage slag interface (7) is connected to the drainage slag channel (9). The pre-fixing mechanism (4) is detachably mounted on the outside of the pipe body (1); the pre-fixing mechanism (4) includes an expansion bag tube (41), and one end of the expansion bag tube (41) close to the sealing disk (3) is connected to an oil injection pipeline (42), and the other end is connected to a connecting oil channel. (43), a lower clamping ring (44) is provided on the outer side of the oil injection pipe (42), and the inner side of the lower clamping ring (44) is detachably connected to the pipe body (1), and an upper clamping ring (45) is provided on the outer side of the connecting oil channel (43), and the inner side of the upper clamping ring (45) is detachably connected to the pipe body (1); the waterproof and slag-proof extraction port (2) is arranged in a duckbill shape, and its inner end face is a smooth arc surface, and the sieve hole (5) is arranged at the inner end face of the waterproof and slag-proof extraction port (2); the connecting oil channel (43) includes a base (431) and a connecting portion (432), the base (431) is a hollow circular tube with closed ends, one end face of which is connected to the connecting portion (432), and the other end of the connecting portion (432) is connected to the expansion bag tube (41), and the connecting portion (432) is arranged in a hollow cylindrical shape.

2. The blowout prevention controller for in-hole gas extraction according to claim 1, characterized in that: The expansion sac tube (41) is evenly distributed around the outside of the tube body (1).

3. The blowout prevention controller for in-hole gas extraction according to claim 1, characterized in that: The lower snap ring (44) and the upper snap ring (45) are both arranged in an annular shape, and the outer sides of the lower snap ring (44) and the upper snap ring (45) are both provided with snap grooves (46) equal in number to the expansion bag tube (41).

4. The blowout prevention controller for in-hole gas extraction according to claim 1, characterized in that: The expansion bladder tube (41) and the outer end surface are arranged in an arc shape, and the inner end surface is in contact with the tube body (1).

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