Intelligent drilling equipment and process for gas extraction

Abstract

The present invention relates to the technical field of gas extraction, and particularly to an intelligent drilling device and process for gas extraction; comprising a drill bit; water outlet holes are opened in the middle and on the side of the drill bit, a support rod is arranged on the drill bit, a cooling unit is arranged on the support rod, an extension rod is installed on the side of the support rod away from the drill bit, the extension rod and the support rod are both hollow structures, and the connection between the extension rods is provided with a support unit; the present invention solves the main problems existing in the current drilling process for coal mine gas extraction, that is, the drilling process is inclined drilling, the water contacted by the upper drill bit is short and small, which will affect the overall cooling effect of the drill bit and easily cause damage to the drill bit, and the drill rod is added too much during the drilling process, and part of the drill rod is deformed and bent, causing the drilling position to deviate from the preset value, thereby increasing the drilling resistance and affecting the later gas extraction work. The present invention ensures the cooling effect of the drill bit and improves the stability of the drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of gas extraction, and in particular to an intelligent drilling device and process for gas extraction. Background Art

[0002] Gas extraction is the process of drilling holes into coal seams and gas concentration areas, and then using extraction equipment to extract the gas in the coal seams and goaf to the ground for utilization, or discharge it into the total return air flow, thereby reducing the amount of gas outburst during coal mining and avoiding explosions due to excessive gas.

[0003] However, the current coal mine gas extraction drilling process mainly has the following problems: 1. Since gas is flammable, water is usually delivered through a hollow pipe during the drilling process, and water is sprayed from the end of the drill bit to reduce the temperature during drilling. However, due to the inclined drilling, the upper drill bit is exposed to water for a short time and in small quantities, which will affect the overall cooling effect of the drill bit and easily cause damage to the drill bit.

[0004] 2. Due to the deep drilling depth and the larger diameter of the drill bit than the extension rod diameter, the drill rod is extended too much during the drilling process, and part of the drill rod is deformed and bent, causing the drilling position to deviate from the predetermined value, thereby increasing the drilling resistance and affecting the subsequent gas extraction work.

[0005] Therefore, in order to ensure the cooling effect of the drill bit and improve the stability of the drilling effect, the present invention provides an intelligent drilling device and process for gas extraction. Summary of the invention

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a gas extraction adopts intelligent drilling equipment, including a drill bit; water outlet holes are opened in the middle and side of the drill bit, a support rod is arranged on the drill bit, a cooling unit is arranged on the support rod, an extension rod is installed on the side of the support rod away from the drill bit, the extension rod and the support rod are both hollow structures, and a support unit is arranged at the connection of the extension rod.

[0007] The cooling unit includes a fixed cylinder, a guide cylinder is threadedly installed on the water outlet hole on the side of the drill bit away from the support rod, a fixed cylinder is provided on the circumferential outer wall of the support rod, a No. 1 spiral sheet is provided on the circumferential outer wall of the fixed cylinder, a narrow opening is provided inside the support rod, a shaft rod is rotatably installed on the side of the narrow opening close to the drill bit, blades are evenly arranged on the circumferential outer wall of the shaft rod along its circumferential direction, a slot hole is symmetrically opened in the fixed cylinder, both ends of the shaft rod extend to the slot hole, and the shaft rod is rotatably matched with the fixed cylinder, a water delivery component matching with the shaft rod is provided in the slot hole, and a control component is provided at the opening position of the slot hole on the side away from the shaft rod.

[0008] Preferably, the water delivery member includes a cam, cams are installed at both ends of the shaft, a piston rod is installed in the slot hole through a tension spring and a fixed plate, and the piston rod and the fixed plate are slidably matched, the slot hole is connected to the support rod with a water outlet channel, the water outlet channel is an L-shaped structure, a baffle is provided between the vertical section and the horizontal section of the water outlet channel through a pin shaft and a torsion spring, and the baffle is rotatably installed in the water outlet channel in an inclined state.

[0009] Preferably, the control member includes an annular groove, an annular groove connected to the slot hole is opened inside the fixed tube on the side close to the drill bit, through holes connected to the annular groove are evenly opened along its circumferential direction on the side close to the drill bit, a partition is provided on the side of the slot hole close to the drill bit, a conical hole is opened in the middle of the partition, a support plate is provided on the side of the partition away from the piston rod, a spring column is installed on the side of the support plate close to the partition, and a sealing block matching the conical hole is installed on the end of the spring column away from the support plate.

[0010] Preferably, the support unit includes a support tube, a support tube is arranged at the connection between the extension rod and the support rod, a limit block is evenly arranged on the circumferential inner wall of the support tube along its circumferential direction, the limit block is slidably matched with the support rod, a part of the support tube on the side of the limit block away from the support rod is threadedly connected with the extension rod, and a No. 2 spiral sheet is arranged on the circumferential outer wall of the support tube.

[0011] Preferably, a cross hole is provided in the middle of the guide tube, and inclined holes are evenly provided on the guide tube along its circumferential direction, and the inclined holes are inclined from top to bottom in a direction away from the axis of the guide tube.

[0012] Preferably, a roller is rotatably mounted on a side of the piston rod close to the cam, and the roller contacts the cam.

[0013] Preferably, both ends of the fixing tube and both ends of the supporting tube are inclined surfaces.

[0014] In addition, the present invention also provides a gas extraction using intelligent drilling process, which is completed by using gas extraction using intelligent drilling equipment, and includes the following steps: S1. Adjusting the angle of the existing drilling drive machine;

[0015] S2. Install the extension rod and the support unit at the end of the support rod;

[0016] S3. A drilling driver drives the drill bit to rotate for drilling, while an existing water pump delivers water for cooling;

[0017] S4. After drilling is completed, the drill bit rotates and exits;

[0018] S5. After the drill bit is withdrawn, subsequent gas extraction operations are carried out.

[0019] The beneficial effects of the present invention are:

[0020] 1. The cooling unit provided in the present invention increases the flow rate of water through the narrow opening in the support rod, drives the water delivery member, and the water delivery member sprays water through the sealing member, thereby realizing multi-faceted spray cooling of the drill bit and improving the cooling effect of the drill bit. At the same time, the sprayed water flow can disperse the debris generated by the processing and facilitate its discharge to ensure smooth drilling.

[0021] 2. The support unit provided in the present invention uses the No. 2 spiral sheet arranged externally to support the extension rod while ensuring the normal discharge of waste chips, so as to avoid adding too many extension rods, which may cause some extension rods to deform and bend, causing the drill bit to deviate from the predetermined trajectory, increase the drilling resistance, damage the drill bit, and the bent hole to affect the rate of gas extraction in the later stage.

[0022] 3. When the drill bit rotates and exits, and there is no ore at the front end of the drill bit to block the diffusion water flow for cooling, the cooling water can also be sprayed directly to the blade part of the drill bit through the inclined hole, so as to avoid the middle end of the drill bit from not being cooled properly when it is exited, generating sparks and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0025] Figure 2 It is a cross-sectional view of the present invention.

[0026] Figure 3 It is a partial structural schematic diagram of the cooling unit of the present invention.

[0027] Figure 4 The present invention Figure 2 A partial enlarged view of point A in the figure.

[0028] Figure 5 The present invention Figure 2 A partial enlarged view of point B in FIG.

[0029] Figure 6 It is a schematic diagram of the structure of the guide tube of the present invention.

[0030] In the figure: 10, drill bit; 11, water outlet; 12, support rod; 13, extension rod; 2, cooling unit; 3, support unit; 20, guide tube; 21, fixed tube; 22, spiral piece No. 1; 23, narrow mouth; 24, shaft rod; 25, blade; 26, slot hole; 4, water delivery part; 5, control part; 40, cam; 41, fixed plate; 42, piston rod; 43, water outlet channel; 44, baffle; 50, annular groove; 51, through hole; 52, partition; 53, frustum hole; 54, support plate; 55, spring column; 56, sealing block; 30, support tube; 31, limit block; 32, spiral piece No. 2; 14, cross hole; 15, inclined hole; 16, roller. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, in order to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0032] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0033] See also Figure 1 and Figure 2 A gas extraction intelligent drilling device includes a drill bit 10; a water outlet hole 11 is opened in the middle and side of the drill bit 10, a support rod 12 is arranged on the drill bit 10, a cooling unit 2 is arranged on the support rod 12, an extension rod 13 is installed on the side of the support rod 12 away from the drill bit 10, the extension rod 13 and the support rod 12 are both hollow structures, and a support unit 3 is arranged at the connection of the extension rod 13.

[0034] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The cooling unit 2 includes a fixed cylinder 21, a guide cylinder 20 is threadedly installed on the water outlet 11 on the side of the drill bit 10 away from the support rod 12, a fixed cylinder 21 is provided on the circumferential outer wall of the support rod 12, and a spiral sheet 22 is provided on the circumferential outer wall of the fixed cylinder 21. A narrow opening 23 is provided inside the support rod 12, and a shaft rod 24 is rotatably installed on the side of the narrow opening 23 close to the drill bit 10. The circumferential outer wall of the shaft rod 24 is evenly provided with blades 25 along its circumferential direction. A slot hole 26 is symmetrically opened in the fixed cylinder 21, and both ends of the shaft rod 24 extend to the slot hole 26, and the shaft rod 24 is rotatably matched with the fixed cylinder 21. A water delivery member 4 cooperating with the shaft rod 24 is provided in the slot hole 26, and a control member 5 is provided at the opening position of the slot hole 26 on the side away from the shaft rod 24.

[0035] During the specific operation, the extension rod 13 and the support unit 3 are manually connected to the support rod 12, and the end of the extension rod 13 at the end is rotated to connect the water pipe, and then the extension rod 13 is driven to rotate by the existing drilling driver. At the same time, the existing water pump transports water to the inside of the extension rod 13 through the water pipe. The water will diffuse and spray out through the guide tube 20. At the same time, the flow rate of the water flow through the narrow mouth 23 is accelerated, and the water flow cluster blades 25 rotate the shaft 24. The shaft 24 drives the water delivery member 4 to take water from the support rod 12 and spray it out, and cooperates with the control to perform multi-directional cooling during the drilling process of the drill bit 10 to ensure the safety of the drilling and save water. At the same time, the support unit 3 supports and positions the extension rod 13 in the borehole to ensure the path of the drilling.

[0036] See also Figure 2 , Figure 5 and Figure 6 A cross hole 14 is provided in the middle of the guide tube 20, and inclined holes 15 are evenly provided on the guide tube 20 along its circumferential direction, and the inclined holes 15 are inclined from top to bottom in a direction away from the axis of the guide tube 20; during specific work, the guide tube 20 is manually installed in the water outlet 11 through the cross hole 14 using a flat screw rod. In the process of water flowing through the guide tube 20, the water will be ejected from the cross hole 14 and the inclined hole 15 to hit the ore and splash, and the splashing water will act on the drill bit 10 to cool it down. When the drill bit 10 is withdrawn, there is no ore blocking the end of the drill bit 10. At this time, the water ejected from the inclined hole 15 will directly rush to the blade of the drill bit 10 to ensure that the tool can still be cooled during the withdrawal of the drill bit 10, so as to avoid safety accidents caused by sparks generated by the collision of broken stones with the blade.

[0037] See also Figure 1 and Figure 2 The support unit 3 includes a support tube 30, and a support tube 30 is arranged at the connection between the extension rod 13 and the support rod 12. The circumferential inner wall of the support tube 30 is evenly provided with limit blocks 31 along its circumferential direction. The limit blocks 31 are slidably matched with the support rod 12. The part of the support tube 30 on the side of the limit block 31 away from the support rod 12 is threadedly connected with the extension rod 13, and the circumferential outer wall of the support tube 30 is provided with a second spiral sheet 32.

[0038] During the specific work, the support tube 30 is first manually put on the support rod 12. Since the support tube 30 and the support rod 12 are slidably matched, the circumferential movement of the support tube 30 is restricted. Then the extension rod 13 and the support tube 30 are threadedly tightened until the extension rod 13 and the support rod 12 are threadedly matched and fixed. Then, during the drilling process, the support tube 30 and the No. 2 spiral piece 32 are fitted with the drilled hole to avoid deformation of some areas when too many extension rods 13 are added, which causes the drilling path of the drill bit 10 to shift, thereby increasing the resistance of the drilling and affecting the smoothness of the later gas extraction. The No. 2 spiral piece 32 supports the extension rod 13 while ensuring the normal discharge of the debris generated by the processing.

[0039] See also Figure 1 and Figure 2 Both ends of the fixed cylinder 21 and both ends of the supporting cylinder 30 are inclined surfaces; during specific operation, the inclined surfaces can ensure that the debris can be discharged smoothly through the fixed cylinder 21 and the supporting cylinder 30, avoiding the accumulation of debris at the connection due to the plane, affecting the water supply and cooling of the cooling unit 2 and the rotation of the extension rod 13.

[0040] See also Figure 2 and Figure 4 The water delivery member 4 includes a cam 40, and cams 40 are installed at both ends of the shaft 24. A piston rod 42 is installed in the slot 26 through a tension spring and a fixing plate 41, and the piston rod 42 and the fixing plate 41 are slidably matched. The slot 26 is connected to the support rod 12 with a water outlet channel 43, and the water outlet channel 43 is an L-shaped structure. A baffle 44 is provided between the vertical section and the horizontal section of the water outlet channel 43 through a pin shaft and a torsion spring, and the baffle 44 is rotatably installed in the water outlet channel 43 in an inclined state.

[0041] During specific operation, the water flow that speeds up the narrow opening 23 drives the blade 25 to rotate, the blade 25 drives the shaft 24 to rotate, the shaft 24 drives the cam 40 to rotate, the cam 40 rotates and, with the cooperation of the tension spring, makes the piston rod 42 reciprocate in the slot 26. When the cam 40 pushes the piston rod 42 to move toward the drill bit 10, the piston rod 42 pushes the water flow to increase the pressure inside the slot 26. Since the baffle 44 is obliquely installed in the water outlet channel 43, the pressure inside the slot 26 increases, which pushes the baffle 44, making the baffle 44 more aligned with the outlet. The inner wall of the water channel 43 is in contact with each other and sealed. At this time, the pressure will be on the control part, pushing the control part 5 open, so that water is sprayed from the slot hole 26 to the drill bit 10, thereby cooling the end of the drill bit 10. When the tension spring drives the piston rod 42 to move toward the shaft rod 24 to reset, the piston rod 42 is sucked inwardly to close the control part 5 to avoid sucking in debris. At this time, under the water pressure inside the support rod 12 and the suction action of the piston rod 42, the baffle 44 rotates, and water flows from the support rod 12 into the slot hole 26 to replenish the water source to ensure subsequent water spraying for cooling.

[0042] See also Figure 2 and Figure 4The control member 5 includes an annular groove 50, an annular groove 50 connected to the slot hole 26 is provided inside the fixed cylinder 21 on the side close to the drill bit 10, and through holes 51 connected to the annular groove 50 are uniformly provided along its circumferential direction on the side close to the drill bit 10. A partition 52 is provided on the side of the slot hole 26 close to the drill bit 10, and a truncated cone hole 53 is provided in the middle of the partition 52. A support plate 54 is provided on the side of the partition 52 away from the piston rod 42, and a spring column 55 is installed on the side of the support plate 54 close to the partition 52, and a sealing block 56 matching the truncated cone hole 53 is installed on the end of the spring column 55 away from the support plate 54.

[0043] During specific operation, the piston rod 42 moves toward the drill bit 10, the internal pressure of the slot 26 increases, the sealing block 56 is pushed away from the conical hole 53, and water flows into the annular groove 50 from the conical hole 53, and is sprayed toward the drill bit 10 through the through hole 51 for cooling, thereby avoiding water shortage on the upper part of the drill bit 10 during the drilling process, which affects the cooling of the drill bit 10. At the same time, when the drill bit 10 is rotated out, the inside of the drilled hole can be flushed to reduce the subsequent extraction workload. When the piston rod 42 is reset by the tension spring, the sealing block 56 is reset to close the conical hole 53 under the action of the spring column 55, thereby ensuring that the piston rod 42 sucks and replenishes the water source.

[0044] See also Figure 4 A roller 16 is rotatably installed on one side of the piston rod 42 close to the cam 40, and the roller 16 contacts the cam 40; during specific operation, the roller 16 can reduce the friction between the cam 40 and the piston rod 42, ensure the smoothness of the movement of the piston rod 42, and improve the service life of the cam 40 and the piston rod 42.

[0045] In addition, the present invention also provides a gas extraction using intelligent drilling process, which is completed by using gas extraction using intelligent drilling equipment, and includes the following steps: S1. adjusting the drilling processing angle of the existing drilling driver according to the calculated angle;

[0046] S2. First, manually put the support tube 30 on the support rod 12 to limit the position, and then the extension rod 13 and the support tube 30 are screwed into the threaded fit until the extension rod 13 and the support rod 12 are fixed with the threaded fit;

[0047] S3. The existing drilling drive drives the extension rod 13 to rotate, and the extension rod 13 drives the drill bit 10 to rotate through the support rod 12 to drill. At the same time, the existing water pump inputs cooling water into the extension rod 13, and a part of the cooling water is sprayed to the end of the drill bit 10 through the cooling unit 2 to cool it down, and the other part is cooled through the water outlet 11 on the drill bit 10 to cool the end of the drill bit 10;

[0048] S4. After the drilling is completed, the drill bit 10 rotates and exits. During the process of the drill bit 10 rotating and exiting, the cooling water sprayed through the through hole 51 and the guide tube 20 cools the drill bit 10 on the one hand, and flushes the drilled hole on the other hand, so as to reduce the workload of subsequent gas extraction;

[0049] S5. After the drill bit 10 is withdrawn, subsequent gas extraction operations are performed.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent drilling device for gas extraction, comprising a drill bit (10); characterized in that: The drill bit (10) is provided with a water outlet hole (11) in the middle and on the side thereof; a support rod (12) is provided on the drill bit (10); a cooling unit (2) is provided on the support rod (12); an extension rod (13) is installed on the side of the support rod (12) away from the drill bit (10); the extension rod (13) and the support rod (12) are both hollow structures; and a support unit (3) is provided at the connection of the extension rod (13); wherein: The cooling unit (2) comprises a fixed cylinder (21), a guide cylinder (20) is threadedly mounted on the water outlet (11) on the side of the drill bit (10) away from the support rod (12), a fixed cylinder (21) is arranged on the circumferential outer wall of the support rod (12), a first spiral sheet (22) is arranged on the circumferential outer wall of the fixed cylinder (21), a narrow opening (23) is arranged inside the support rod (12), and a shaft is rotatably mounted on the side of the narrow opening (23) close to the drill bit (10) (24), the circumferential outer wall of the shaft rod (24) is evenly provided with blades (25) along its circumferential direction, a slot hole (26) is symmetrically opened in the front and rear of the fixing cylinder (21), both ends of the shaft rod (24) extend to the slot hole (26), and the shaft rod (24) and the fixing cylinder (21) are rotatably matched, a water conveying member (4) matched with the shaft rod (24) is arranged in the slot hole (26), and a control member (5) is arranged at an opening position on one side of the slot hole (26) away from the shaft rod (24); The water delivery member (4) comprises a cam (40), and the cams (40) are installed at both ends of the shaft (24). A piston rod (42) is installed in the slot hole (26) through a tension spring and a fixing plate (41), and the piston rod (42) and the fixing plate (41) are slidably matched. The slot hole (26) and the support rod (12) are connected to form a water outlet channel (43), and the water outlet channel (43) is an L-shaped structure. A baffle (44) is provided between the vertical section and the horizontal section of the water outlet channel (43) through a pin shaft and a torsion spring, and the baffle (44) is rotatably installed in the water outlet channel (43) in an inclined state. The control member (5) comprises an annular groove (50), an annular groove (50) communicating with the slot hole (26) is provided inside the fixed cylinder (21) on the side close to the drill bit (10), through holes (51) communicating with the annular groove (50) are uniformly provided along the circumferential direction of the fixed cylinder (21) on the side close to the drill bit (10), a partition (52) is provided on the side close to the drill bit (10), a truncated cone hole (53) is provided in the middle of the partition (52), a support plate (54) is provided on the side of the partition (52) away from the piston rod (42), a spring column (55) is installed on the side of the support plate (54) close to the partition (52), and a sealing block (56) matching the truncated cone hole (53) is installed on the end of the spring column (55) away from the support plate (54).

2. The intelligent drilling device for gas extraction according to claim 1 is characterized in that: The support unit (3) comprises a support tube (30), wherein the support tube (30) is arranged at the connection between the extension rod (13) and the support rod (12), and the circumferential inner wall of the support tube (30) is evenly provided with limit blocks (31) along its circumferential direction, the limit blocks (31) are slidably matched with the support rod (12), and the part of the support tube (30) on the side of the limit blocks (31) away from the support rod (12) is threadedly connected to the extension rod (13), and the circumferential outer wall of the support tube (30) is provided with a second spiral sheet (32).

3. The intelligent drilling device for gas extraction according to claim 1 is characterized in that: A cross hole (14) is provided in the middle of the guide tube (20), and inclined holes (15) are evenly provided on the guide tube (20) along its circumferential direction, and the inclined holes (15) are inclined from top to bottom in a direction away from the axis of the guide tube (20).

4. The intelligent drilling device for gas extraction according to claim 1 is characterized in that: A roller (16) is rotatably mounted on one side of the piston rod (42) close to the cam (40), and the roller (16) is in contact with the cam (40).

5. The intelligent drilling device for gas extraction according to claim 3 is characterized in that: Both ends of the fixing tube (21) and both ends of the supporting tube (30) are inclined surfaces.

6. A gas extraction method using intelligent drilling technology, characterized in that: The gas extraction as claimed in claim 1 is completed by using an intelligent drilling device, comprising the following steps: S1. Adjust the angle of the existing drilling driver; S2. Installing an extension rod (13) and a support unit (3) at the end of the support rod (12); S3. The existing drilling driver drives the drill bit (10) to rotate for drilling, while the existing water pump delivers water for cooling; S4. After drilling is completed, the drill bit (10) rotates and exits; S5. After the drill bit (10) is withdrawn, subsequent gas extraction operations are performed.

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