CN119531931B - Anti-collapse supporting device and supporting method for coal bed gas extraction drilling - Google Patents
Anti-collapse supporting device and supporting method for coal bed gas extraction drilling Download PDFInfo
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- CN119531931B CN119531931B CN202411725304.4A CN202411725304A CN119531931B CN 119531931 B CN119531931 B CN 119531931B CN 202411725304 A CN202411725304 A CN 202411725304A CN 119531931 B CN119531931 B CN 119531931B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Geochemistry & Mineralogy (AREA)
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Abstract
本发明提供了煤层瓦斯抽采钻孔防塌支护装置及支护方法，包括支护筛管，支护筛管包括多个筛管固定板，相邻的两个筛管固定板分别通过筛管活动件连接；阻尼组件，阻尼组件与筛管固定板滑动连接，阻尼组件用于对煤层瓦斯抽采钻孔进行防塌支护；伸缩控制组件，中心管通过多个伸缩控制组件分别与多个阻尼组件连接。本发明利用伸缩控制组件可对筛管固定板等结构的位置进行调节，使得支护筛管可进行伸缩，从而便于将支护筛管放入煤层瓦斯抽采钻孔内，支护筛管可进行展开，支护筛管展开过程中，阻尼组件先与煤层钻孔壁接触并对煤层产生二次应力扰动，有利于瓦斯抽采，当支护筛管完全展开，阻尼组件已插入煤层中，能够降低煤层对筛管等结构的破坏，对煤层瓦斯抽采钻孔起到支护作用。
The present invention provides a coal seam gas extraction drilling hole anti-collapse support device and support method, including a support screen, the support screen includes a plurality of screen fixing plates, two adjacent screen fixing plates are respectively connected by screen movable parts; a damping assembly, the damping assembly is slidably connected to the screen fixing plate, and the damping assembly is used to perform anti-collapse support on the coal seam gas extraction drilling hole; a telescopic control assembly, the central pipe is respectively connected to the plurality of damping assemblies through a plurality of telescopic control assemblies. The present invention uses the telescopic control assembly to adjust the position of the screen fixing plate and other structures, so that the support screen can be telescopic, thereby facilitating the placement of the support screen into the coal seam gas extraction drilling hole, and the support screen can be unfolded. During the unfolding process of the support screen, the damping assembly first contacts the coal seam drilling hole wall and generates secondary stress disturbance to the coal seam, which is beneficial to gas extraction. When the support screen is fully unfolded, the damping assembly has been inserted into the coal seam, which can reduce the damage of the coal seam to the screen and other structures, and play a supporting role in the coal seam gas extraction drilling hole.
Description
Technical Field
The invention relates to the field of coal seam gas extraction, in particular to a coal seam gas extraction drilling collapse-preventing supporting device and a supporting method.
Background
Coalbed methane is a mixed gas composed of methane, carbon dioxide, nitrogen and the like which escape from coal and surrounding rock. The gas is colorless, odorless, and can burn or explode, is difficult to dissolve in water, has higher diffusivity than air, is nontoxic, and can cause choking when the concentration is high. The gas in the coal seam has two main states, the gas in the penetrating space is free gas, called free gas or free gas, the gas in the state obeys the ideal gas state equation, the other gas is called adsorption gas, the adsorption gas is mainly adsorbed on the micropore surface of the coal and inside the coal particles, and occupies the space between the vacancies of the coal molecular structure or coal molecules. When the coal seam is mined, the coal body is damaged or mined, and part of gas stored in the coal body can leave the coal body and flow into the mining space.
Because the coal body is softer in the high-gas soft coal seam, the phenomenon of hole collapse is easy to occur after long-distance directional drilling is performed, so that drilling is blocked, even scrapped, high-efficiency extraction of underground gas is severely restricted, the safety production of a mine is influenced, and the method is extremely important for preventing and controlling the phenomenon of hole collapse of drilling holes in different coal seams, different working surfaces and different stress environments, and innovative upgrading of a hole collapse prevention technology and method is very important, and is disclosed in the patent publication number of the issued Chinese utility model: in CN214660327U, the name is that in the support device for coal seam gas extraction drilling, it is through setting up the non return subassembly on the support main part, when the stabilizer blade pops out to support in the drilling, the non return subassembly is in the open state and is arranged in between stabilizer blade and the support main part, when the stabilizer blade rotates to accomodating the groove, it is outside to accomodate the groove to be restricted the card by the non return subassembly, effectively prevent to support the stabilizer blade receipts retraction accomodating groove in the drilling, ensure the effective support of stabilizer blade in the drilling, prevent the drilling collapse, guarantee going on smoothly of gas extraction work, but in the above-mentioned application, the stabilizer blade is difficult to open in the drilling, and the supporting property is relatively poor, structural strength is low, the effort of coal seam to support device is great, easily damage support device.
Disclosure of Invention
The invention aims to overcome the defects of difficult installation and poor supporting performance in the prior art and provides a coal seam gas extraction drilling collapse-preventing supporting device and a supporting method.
The invention solves the technical problems by the following technical scheme:
The invention provides a coal seam gas extraction drilling collapse-preventing supporting device and a supporting method, wherein the supporting device comprises a supporting screen pipe, the supporting screen pipe comprises a plurality of screen pipe fixing plates, and two adjacent screen pipe fixing plates are respectively connected through a screen pipe movable part;
The damping assembly is arranged on the inner side of the screen pipe fixing plate and is in sliding connection with the screen pipe fixing plate, and the damping assembly is used for carrying out collapse-preventing support on coal bed gas extraction drilling holes;
The central pipe is arranged on the inner side of the screen pipe fixing plate;
the central tube is respectively connected with the damping assemblies through the telescopic control assemblies.
In this technical scheme, utilize flexible control assembly can adjust the position of screen pipe fixed plate isotructure for support screen pipe can stretch out and draw back, thereby be convenient for put into the coal seam gas drainage drilling with support screen pipe, utilize flexible control assembly can expand support screen pipe, damping component first with coal seam borehole wall contact and produce the secondary stress disturbance to the coal seam, be favorable to the gas drainage, when support screen pipe expandes completely, damping component has been inserted in the coal seam, can reduce the damage of coal seam to structures such as screen pipe, play the supporting role to the coal seam gas drainage drilling.
Preferably, the screen pipe moving part comprises an extension plate and an anti-falling plate, wherein both sides of the extension plate are connected with the anti-falling plates, and the two anti-falling plates are respectively and slidably connected with the two screen pipe fixing plates.
In the technical scheme, two screen pipe fixing plates can be movably connected by using a screen pipe moving part.
Preferably, the movable cavities are formed in two sides of the screen pipe fixing plate, and the anti-falling plate is arranged in the movable cavities.
In the technical scheme, the extension plate can be prevented from falling out of the screen pipe fixing plate by the anti-falling plate.
Preferably, the extension plate is provided with a plurality of communication ports.
In the technical scheme, coal bed gas and the like enter the supporting sieve tube through the communication port.
Preferably, the damping component comprises an anti-out plate and damping blocks, and one side of the anti-out plate is connected with a plurality of damping blocks;
the screen pipe fixed plate is provided with a telescopic opening, and one end of the damping block extends to the outer side of the screen pipe fixed plate through the telescopic opening.
In the technical scheme, the damping component can be used for increasing the contact area between the support screen pipe and the coal seam, and the protection screen pipe can be supported in the drill hole.
Preferably, the damping block is wrapped outside the supporting framework, and one side of the supporting framework is connected with one side of the anti-out plate;
the telescopic opening is connected with a positioning column, and the surface of the positioning column is connected with the supporting framework in a sliding penetrating manner.
In the technical scheme, the damping block can move at the screen pipe fixing plate by utilizing the positioning column, and meanwhile, the screen pipe fixing plate can be driven to move.
Preferably, the telescopic control assembly comprises a threaded shaft, the threaded shaft is arranged on the inner side of the central tube, and a plurality of moving plates are connected to the surface of the threaded shaft in a threaded manner;
The side surface of the movable plate is provided with a plurality of control columns distributed in an annular array, and two ends of each control column are respectively connected with a rotating frame in a rotating way;
One side of the rotating frame is connected to the side face of the movable plate, and the other side of the rotating frame is connected to one side of the anti-out plate.
In the technical scheme, the telescopic control assembly can drive the structures such as the damping assembly, the screen pipe fixing plate and the like to move, so that the screen pipe fixing plate and the damping assembly can extend and retract.
Preferably, a plurality of support plates are connected to the inner wall of the central tube, and the threaded shaft surface is rotatably connected with the support plates in a penetrating way.
In this technical scheme, utilize the backup pad can support the screw shaft.
Preferably, two adjacent screen pipe fixing plates are connected through a dismounting mechanism, the dismounting mechanism comprises a plurality of dismounting components and a follow-up component, the two adjacent dismounting components are connected through the follow-up component, and two sides of the dismounting components are detachably connected with the two screen pipe fixing plates respectively;
The dismounting assembly comprises a fixing frame, the section of the fixing frame is of an H-shaped structure, and the outer sides of the fixing frame and the damping assembly are detachably connected through a plurality of dismounting bolts;
The follow-up assembly comprises a telescopic support, two ends of the telescopic support are respectively connected with the side faces of the two fixing frames in a sliding penetrating manner, two sides of the fixing frames are respectively provided with an elastic shielding belt, and two ends of the elastic shielding belt are respectively connected with the side faces of the fixing frames;
The follow-up assembly further comprises a special-shaped column, one end of the central tube is connected with the special-shaped column, and the other end of the central tube is provided with a special-shaped groove.
In the technical scheme, the disassembly and assembly mechanism can be used for completing the assembly and disassembly between the adjacent support sieve tubes, so that the length of the support device can be changed conveniently, and the support device can be used, transported and stored conveniently.
The supporting method comprises the following operation steps:
Step one, length control, according to the length of coal seam gas extraction drilling, connecting a plurality of screen pipe fixing plates in sequence to form a supporting screen pipe with a corresponding length, placing two supporting screen pipes in a fixing frame during connection, adjusting angles of a central pipe and the fixing frame at the moment, enabling a special-shaped column at one central pipe to be installed in a special-shaped groove at the other central pipe, then installing a plurality of dismounting bolts in sequence to complete connection of the two supporting screen pipes, and then connecting a plurality of supporting screen pipes in sequence to form the supporting screen pipe with a corresponding length;
placing a support screen pipe, and placing the support screen pipe into a coal seam gas extraction borehole;
Step three, anti-collapse support, pulling the threaded shaft to drive the movable plate to move, the cooperation rotating frame makes the control post move to screen pipe fixed plate outside, can drive the board that prevents out this moment and remove to screen pipe fixed plate outside, and then drive braced frame and damping piece and remove to screen pipe fixed plate outside, stretch out the screen pipe fixed plate with the damping piece, then continue to drive screen pipe fixed plate and remove to the outside, thereby stretch out a plurality of screen pipe fixed plates, when screen pipe fixed plate removes, make a plurality of damping components move to the outside respectively, can make the extension board expose this moment, finally the damping piece inserts in the coal body, screen pipe fixed plate and coal seam gas take out borehole wall in close contact.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
According to the invention, the positions of structures such as the screen pipe fixing plate and the like can be adjusted by utilizing the telescopic control assembly, so that the support screen pipe can be telescopic, the support screen pipe can be conveniently put into a coal seam gas extraction borehole, the telescopic control assembly can be used for expanding the support screen pipe, in the expanding process of the support screen pipe, the damping assembly is firstly contacted with the wall of the coal seam borehole and generates secondary stress disturbance on the coal seam, gas extraction is facilitated, and when the support screen pipe is fully expanded, the damping assembly is inserted into the coal seam, the damage of the coal seam to the structures such as the screen pipe and the like can be reduced, and the support effect on the coal seam gas extraction borehole is realized.
Drawings
Fig. 1 is a schematic structural diagram of a coal bed gas extraction drilling collapse-preventing support device and a support method according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an overall shrinkage side view structure of the coal-bed gas extraction borehole collapse prevention support device and the support method shown in fig. 1.
Fig. 3 is a schematic side view of the coal-bed gas extraction borehole collapse prevention support device and the support method in an overall unfolded state.
Fig. 4 is a schematic diagram of the overall internal structure of the coal-bed gas extraction borehole collapse-preventing support device and the support method shown in fig. 1.
Fig. 5 is a schematic sectional structure view of a storage state of a telescopic control assembly of the coal-bed gas extraction drilling collapse-preventing support device and the support method shown in fig. 1.
Fig. 6 is a schematic cross-sectional structural view of a damping assembly of the coal-bed gas drainage borehole collapse-preventing support device and the support method shown in fig. 1.
Fig. 7 is a schematic cross-sectional structural view of a dismounting assembly and a follower assembly of the coal bed gas extraction borehole collapse prevention support device and the support method shown in fig. 1.
Fig. 8 is a schematic diagram of a partial enlarged structure at a position a of the coal-bed gas extraction drilling collapse-preventing support device and the support method shown in fig. 4.
Description of the reference numerals
1. A screen fixing plate;
2. The screen pipe moving part comprises a screen pipe moving part, a 21, an extension plate, a 22, an anti-falling plate;
3. a damping assembly; 31, an anti-falling plate, 32, a damping block, 33, a supporting framework, 34 and a positioning column;
4. A central tube;
5. A telescoping control assembly; 51, a threaded shaft, 52, a movable plate, 53, a control column, 54, a rotating frame, 55 and a supporting plate;
6. The assembly and disassembly components are assembled and disassembled 61, the fixing frame 62 and the assembly and disassembly bolts;
7. The device comprises a follow-up assembly, a telescopic support column, an elastic shielding belt, a special-shaped column, a special-shaped groove and a special-shaped groove.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Fig. 1 to 8 are schematic structural views of an embodiment of a coal bed gas extraction borehole collapse prevention support device and a support method according to the present invention. The coal seam gas extraction drilling collapse-preventing supporting device and the supporting method comprise supporting sieve tubes, wherein each supporting sieve tube comprises a plurality of sieve tube fixing plates 1, and two adjacent sieve tube fixing plates 1 are respectively connected through a sieve tube movable part 2;
The damping assembly 3 is arranged on the inner side of the screen pipe fixing plate 1, the damping assembly 3 is in sliding connection with the screen pipe fixing plate 1, and the damping assembly 3 is used for carrying out collapse-preventing support on coal bed gas extraction drilling holes;
A central pipe 4, wherein the central pipe 4 is arranged on the inner side of the screen pipe fixing plate 1;
The central tube 4 is respectively connected with the damping assemblies 3 through the telescopic control assemblies 5.
In this technical scheme, utilize flexible control assembly 5 can adjust the position of screen pipe fixed plate 1 isotructure for support screen pipe can stretch out and draw back, thereby be convenient for put into the coal seam gas drainage drilling with support screen pipe, utilize flexible control assembly 5 can expand support screen pipe, utilize damping subassembly 3 and coal seam borehole wall contact this moment, utilize damping subassembly 3 to carry out the secondary disturbance to the coal seam pressure, be favorable to the gas to take out, and can reduce the destruction of coal seam to screen pipe fixed plate 1 isotructure, play the supporting role to the coal seam gas drainage drilling.
The screen pipe moving part 2 comprises an extension plate 21 and an anti-falling plate 22, wherein the two sides of the extension plate 21 are connected with the anti-falling plates 22, and the two anti-falling plates 22 are respectively connected with the two screen pipe fixing plates 1 in a sliding mode.
In the technical scheme, two screen pipe fixing plates 1 can be movably connected by using a screen pipe moving part 2.
The two sides of the screen pipe fixing plate 1 are provided with movable cavities, and the anti-falling plate 22 is arranged in the movable cavities.
In the present embodiment, the extension plate 21 is prevented from coming out of the screen fixing plate 1 by the anti-drop plate 22.
The extension plate 21 is provided with a plurality of communication ports.
In the technical scheme, coal bed gas and the like enter the supporting sieve tube through the communication port.
When the screen pipe fixing plate 1 is used, the screen pipe fixing plate 1 moves along with the control of the damping assembly 3 and the telescopic control assembly 5, so that the screen pipe fixing plate 1 can store and discharge the extension plate 21, and the screen pipe supporting shrinkage and extension are completed.
The damping assembly 3 comprises an anti-out plate 31 and damping blocks 32, wherein one side of the anti-out plate 31 is connected with a plurality of damping blocks 32;
the screen pipe fixing plate 1 is provided with a telescopic opening, and one end of the damping block 32 extends to the outer side of the screen pipe fixing plate 1 through the telescopic opening.
In the technical scheme, the damping assembly 3 can be used for increasing the contact area between the support screen pipe and the coal seam, and the protection screen pipe can be supported in the drill hole.
When the damping block 32 is used, when the coal bed in the drill hole has acting force on supporting the screen pipe, the damping block 32 can reduce damage to the screen pipe and play a supporting role, and the two damping blocks 32 in opposite directions can mutually support.
The damping block 32 can increase the contact area between the support screen pipe and the coal seam, and increase the gas extraction efficiency.
The damping block 32 is wrapped outside the supporting framework 33, and one side of the supporting framework 33 is connected with one side of the anti-out plate 31;
the telescopic opening is connected with a positioning column 34, and the surface of the positioning column 34 is connected with the supporting framework 33 in a sliding penetrating way.
In the technical scheme, the damping block 32 can move at the screen pipe fixing plate 1 by utilizing the positioning column 34, and meanwhile, the screen pipe fixing plate 1 can be driven to move.
When the support screen pipe is used, after the support screen pipe is sent into a coal seam gas extraction borehole, the telescopic control assembly 5 controls the anti-out plate 31 to move, so that the damping block 32 and the supporting framework 33 are driven to move towards the outer side of the screen pipe fixing plate 1, and after the damping block 32 is exposed out of the screen pipe fixing plate 1, the anti-out plate 31 continuously pushes the screen pipe fixing plate 1 and the positioning column 34 to move in the same direction, and therefore extension of the support screen pipe is completed;
When the support screen pipe is contracted, the support screen pipe can be conveniently conveyed into a coal seam gas extraction drill hole by adopting the opposite mode.
The telescopic control assembly 5 comprises a threaded shaft 51, the threaded shaft 51 is arranged on the inner side of the central tube 4, and a plurality of moving plates 52 are connected to the surface of the threaded shaft 51 in a threaded manner;
The side surface of the moving plate 52 is provided with a plurality of control columns 53 distributed in an annular array, and two ends of the control columns 53 are respectively connected with a rotating frame 54 in a rotating way;
The rotating frame 54 on one side is connected to the side of the moving plate 52, and the rotating frame 54 on the other side is connected to one side of the anti-out plate 31.
In the technical scheme, the telescopic control assembly 5 can drive the structures such as the damping assembly 3 and the screen pipe fixing plate 1 to move, so that the screen pipe fixing plate 1 and the damping assembly 3 can extend and retract.
The inner wall of the central tube 4 is connected with a plurality of support plates 55, and the surface of the threaded shaft 51 is rotatably connected with the support plates 55 in a penetrating way.
In this embodiment, the screw shaft 51 can be supported by the support plate 55.
When in use, the threaded shaft 51 is pulled to drive the moving plate 52 to move, and the control column 53 can be driven to move outwards under the cooperation of the rotating frame 54 at this time, so that the anti-out plate 31 can be driven to move, and further the extension and contraction of the screen pipe fixing plate 1 can be controlled.
The two adjacent screen pipe fixing plates 1 are connected through a dismounting mechanism, the dismounting mechanism comprises a plurality of dismounting assemblies 6 and a follow-up assembly 7, the two adjacent dismounting assemblies 6 are connected through the follow-up assembly 7, and two sides of each dismounting assembly 6 are respectively and detachably connected with the two screen pipe fixing plates 1;
The dismounting assembly 6 comprises a fixing frame 61, the section of the fixing frame 61 is of an H-shaped structure, and the outer sides of the fixing frame 61 and the damping assembly 3 are detachably connected through a plurality of dismounting bolts 62;
the following assembly 7 comprises a telescopic support 71, two ends of the telescopic support 71 are respectively connected with the side surfaces of the two fixing frames 61 in a sliding penetrating manner, two sides of the fixing frames 61 are respectively provided with an elastic shielding belt 72, and two ends of the elastic shielding belt 72 are respectively connected with the side surfaces of the fixing frames 61;
The follower assembly 7 further comprises a special-shaped column 73, one end of the central tube 4 is connected with the special-shaped column 73, and the other end of the central tube 4 is provided with a special-shaped groove 74.
In the technical scheme, the disassembly and assembly mechanism can be used for completing the assembly and disassembly between the adjacent support sieve tubes, so that the length of the support device can be changed conveniently, and the support device can be used, transported and stored conveniently.
When the support device is used, according to the length of coal bed gas extraction drilling holes, screen pipe fixing plates 1 on two sides are respectively placed on two sides of a fixing frame 61, a special-shaped column 73 at one central pipe 4 is installed in a special-shaped groove 74 at the other central pipe 4, then a plurality of dismounting bolts 62 are sequentially installed, the screen pipe fixing plates 1 are connected with the fixing frame 61, connection between two support screen pipes is completed, and then a plurality of support screen pipes can be sequentially connected in the same mode, so that the length of the support device can be changed.
The supporting method comprises the following operation steps:
Step one, length control, according to the length of coal seam gas extraction drilling, connect a plurality of screen pipe fixed plates 1 sequentially, form the support screen pipe of the corresponding length, when connecting, place two support screen pipes in the fixed mount 61, adjust the angle of central tube 4 and fixed mount 61 at this moment, make the profiled column 73 of a central tube 4 place install in the profiled groove 74 of another central tube 4 place, then install a plurality of dismounting bolts 62 sequentially, finish the connection of two support screen pipes, then connect a plurality of support screen pipes sequentially, form the support screen pipe of the corresponding length;
placing a support screen pipe, and placing the support screen pipe into a coal seam gas extraction borehole;
Step three, the collapse prevention support is carried out, the threaded shaft 51 is pulled, the moving plate 52 is driven to move, the control column 53 is driven to move towards the outer side of the screen pipe fixing plate 1 by being matched with the rotating frame 54, the collapse prevention plate 31 can be driven to move towards the outer side of the screen pipe fixing plate 1, the supporting framework 33 and the damping block 32 are driven to move towards the outer side of the screen pipe fixing plate 1, the damping block (32) stretches out of the screen pipe fixing plate 1, then the screen pipe fixing plate 1 is driven to move towards the outer side continuously, a plurality of screen pipe fixing plates 1 are stretched, when the screen pipe fixing plate 1 moves, the damping assemblies 3 are respectively moved towards the outer side, the stretching plate 21 can be exposed at the moment, the damping block 32 is inserted into a coal body finally, and the screen pipe fixing plate 1 is in tight contact with a coal seam gas extraction drilling hole wall.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (7)
1. The anti-collapse supporting device for the coal bed gas extraction drilling hole is characterized by comprising a supporting screen pipe, wherein the supporting screen pipe comprises a plurality of screen pipe fixing plates (1), and two adjacent screen pipe fixing plates (1) are respectively connected through a screen pipe movable part (2);
The screen pipe moving part (2) comprises an extension plate (21) and an anti-falling plate (22), wherein the anti-falling plates (22) are connected to two sides of the extension plate (21), and the two anti-falling plates (22) are respectively connected with the two screen pipe fixing plates (1) in a sliding mode;
The damping assembly (3) is arranged on the inner side of the screen pipe fixing plate (1), the damping assembly (3) is connected with the screen pipe fixing plate (1) in a sliding mode, and the damping assembly (3) is used for carrying out collapse-preventing support on coal bed gas extraction drilling holes;
the damping assembly (3) comprises an anti-out plate (31) and damping blocks (32), and one side of the anti-out plate (31) is connected with a plurality of damping blocks (32);
the screen pipe fixing plate (1) is provided with a telescopic opening, and one end of the damping block (32) extends to the outer side of the screen pipe fixing plate (1) through the telescopic opening;
The central pipe (4) is arranged at the inner side of the screen pipe fixing plate (1);
The central tube (4) is respectively connected with the damping assemblies (3) through the telescopic control assemblies (5);
The telescopic control assembly (5) comprises a threaded shaft (51), the threaded shaft (51) is arranged on the inner side of the central tube (4), and a plurality of moving plates (52) are connected to the surface of the threaded shaft (51) in a threaded manner;
A plurality of control columns (53) distributed in an annular array are arranged on the side face of the moving plate (52), and rotating frames (54) are respectively connected to two ends of the control columns (53) in a rotating mode;
wherein the rotating frame (54) on one side is connected with the side surface of the movable plate (52), and the rotating frame (54) on the other side is connected with one side of the anti-out plate (31).
2. The coal seam gas drainage borehole collapse prevention support device according to claim 1, wherein movable cavities are formed in two sides of the screen pipe fixing plate (1), and the anti-falling plate (22) is arranged in the movable cavities.
3. The coal seam gas drainage borehole collapse prevention support device according to claim 2, wherein the extension plate (21) is provided with a plurality of communication ports.
4. The coal seam gas drainage borehole collapse prevention support device according to claim 3, wherein the damping block (32) is wrapped outside the supporting framework (33), and one side of the supporting framework (33) is connected with one side of the escape prevention plate (31);
The telescopic opening is connected with a positioning column (34), and the surface of the positioning column (34) is connected with a supporting framework (33) in a sliding penetrating manner.
5. The coal seam gas drainage borehole collapse prevention support device according to claim 4, wherein the inner wall of the central tube (4) is connected with a plurality of support plates (55), and the surface of the threaded shaft (51) is rotatably connected with the support plates (55) in a penetrating way.
6. The coal seam gas drainage borehole collapse prevention support device according to claim 5, wherein two adjacent screen pipe fixing plates (1) are connected through a disassembly and assembly mechanism, the disassembly and assembly mechanism comprises a plurality of disassembly and assembly components (6) and a follow-up component (7), the two adjacent disassembly and assembly components (6) are connected through the follow-up component (7), and two sides of the disassembly and assembly components (6) are respectively and detachably connected with the two screen pipe fixing plates (1);
The dismounting assembly (6) comprises a fixing frame (61), the section of the fixing frame (61) is of an H-shaped structure, and the outer sides of the fixing frame (61) and the damping assembly (3) are detachably connected through a plurality of dismounting bolts (62);
The follow-up assembly (7) comprises a telescopic strut (71), two ends of the telescopic strut (71) are respectively connected with the side faces of the two fixing frames (61) in a sliding penetrating manner, elastic shielding belts (72) are respectively arranged on two sides of the fixing frames (61), and two ends of each elastic shielding belt (72) are respectively connected with the side faces of the fixing frames (61);
the follow-up assembly (7) further comprises a special-shaped column (73), one end of the central tube (4) is connected with the special-shaped column (73), and the other end of the central tube (4) is provided with a special-shaped groove (74).
7. The method for supporting the coal-bed gas extraction drilling collapse prevention supporting device according to claim 6, wherein the supporting method comprises the following steps:
Step one, length control, according to the length of coal seam gas extraction drilling, connect a plurality of screen pipe fixed plates (1) sequentially, form the support screen pipe of the corresponding length, in connection, place two support screen pipes in the fixed mount (61), adjust the angle of central tube (4) and fixed mount (61) at this moment, make the profiled column (73) of a central tube (4) install in the profiled groove (74) of another central tube (4), then install a plurality of dismounting bolts (62) sequentially, finish the connection of two support screen pipes, then connect a plurality of support screen pipes sequentially, form the support screen pipe of the corresponding length;
placing a support screen pipe, and placing the support screen pipe into a coal seam gas extraction borehole;
Step three, prevent support that collapses, pulling screw thread axle (51) to drive movable plate (52) and remove, cooperation rotating turret (54) make control post (53) to screen pipe fixed plate (1) outside remove, can drive prevent out board (31) this moment and remove to screen pipe fixed plate (1) outside, and then drive braced frame (33) and damping piece (32) and remove to screen pipe fixed plate (1) outside, stretch out screen pipe fixed plate (1) with damping piece (32), then continue to drive screen pipe fixed plate (1) outside and remove, thereby stretch out a plurality of screen pipe fixed plates (1), when screen pipe fixed plate (1) removed, make a plurality of damping components (3) outside remove respectively, can make extension board (21) expose this moment, finally damping piece (32) insert in the coal body, screen pipe fixed plate (1) and coal seam gas take out borehole wall in close contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN216446855U (en) * | 2021-11-28 | 2022-05-06 | 山西潞安环保能源开发股份有限公司常村煤矿 | Anti-hole-collapse device in coal bed gas extraction drill hole |
| CN117988915A (en) * | 2024-01-08 | 2024-05-07 | 中煤科工西安研究院(集团)有限公司 | Roof directional long-drilling flexible protection hole mining pressure relief gas extraction machine tool and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA67719C2 (en) * | 1995-11-08 | 2004-07-15 | Shell Int Research | Deformable well filter and method for its installation |
| US7407013B2 (en) * | 2006-12-21 | 2008-08-05 | Schlumberger Technology Corporation | Expandable well screen with a stable base |
| CN207229089U (en) * | 2017-09-05 | 2018-04-13 | 中国矿业大学(北京) | A kind of mash gas pumping drilling stability fixed point monitoring maintenance device |
| CN107401402A (en) * | 2017-09-05 | 2017-11-28 | 中国矿业大学(北京) | A kind of mash gas pumping drilling stability fixed point monitoring attending device and method |
| CN112682094B (en) * | 2021-02-25 | 2024-12-20 | 西安科技大学 | Coal seam gas extraction drilling support device and use method thereof |
| CN114183075B (en) * | 2021-12-06 | 2022-07-05 | 中国矿业大学(北京) | An integrated construction device and method for downhole drilling-expanding-protection |
| CN216788471U (en) * | 2022-02-16 | 2022-06-21 | 西安科技大学 | Elastic self-adaptive gas drainage pipe capable of preventing hole collapse damage |
| CN114233249B (en) * | 2022-02-22 | 2022-04-29 | 山东兆鑫石油工具有限公司 | A pressure-resistant screen tube for high temperature oil well work |
| CN117211859A (en) * | 2023-10-16 | 2023-12-12 | 河南理工大学 | Variable-diameter large-diameter drilling gas extraction support screen pipe and use method thereof |
| CN117248957B (en) * | 2023-11-06 | 2025-12-05 | 中国矿业大学(北京) | A device for achieving hole protection using a self-expanding support |
| CN221119927U (en) * | 2023-11-07 | 2024-06-11 | 中煤科工集团南京设计研究院有限公司 | Gas extraction screen pipe |
| CN118029978A (en) * | 2023-11-28 | 2024-05-14 | 河南工业职业技术学院 | Active hole protection anti-collapse screen pipe and hole sealing integrated device for gas drainage |
| CN221799761U (en) * | 2023-12-27 | 2024-10-01 | 山西潞安集团余吾煤业有限责任公司 | Anti-collapse hole gas extraction sieve tube |
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| CN216446855U (en) * | 2021-11-28 | 2022-05-06 | 山西潞安环保能源开发股份有限公司常村煤矿 | Anti-hole-collapse device in coal bed gas extraction drill hole |
| CN117988915A (en) * | 2024-01-08 | 2024-05-07 | 中煤科工西安研究院(集团)有限公司 | Roof directional long-drilling flexible protection hole mining pressure relief gas extraction machine tool and method |
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