Device for preventing and relieving drill burying caused by coal field drilling rock powder

Abstract

The invention relates to a device for preventing and relieving drill burying caused by coal field drilling rock powder, which comprises a suction pipe, a rope, a winch and a plurality of support detection rings, the plurality of support detection rings are arranged from top to bottom along a drill hole, a space is reserved between the adjacent support detection rings, and the top of the rope is connected with the winch on the ground. The lower part is connected with each supporting detection ring in sequence, and each supporting detection ring is lowered or lifted through a winch; the top of the suction pipe is connected with a muddy water collecting device on the ground, the lower portion of the suction pipe is sequentially connected with the supporting detection rings, and the bottom of the suction pipe is connected with the lowermost supporting detection ring and used for sucking rock powder below the lowermost supporting detection ring. The supporting detection rings are provided with pumps, and the pump on each supporting detection ring is connected into the suction pipe to provide power for sucking materials containing rock powder in the drill hole.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine drilling, and in particular relates to a device for preventing and alleviating rock dust burying a drill in coal field drilling. Background Art

[0002] Coalfield geological exploration and mining involve the drilling process. The underground rocks in most coalfields in my country are mainly sedimentary rocks, which are relatively soft. During drilling, mud is generally used to form a circulating fluid, which brings the rock powder generated during the drilling process to the surface. However, if the mud is used improperly, the circulating fluid will be too thin, and the rock powder is generally fine in particles, so it is difficult to bring the rock powder to the surface, and it will be distributed around the drill bit and drill rod. Over time, more and more rock powder will wrap the drill rod and drill bit, causing the drill bit and drill rod to be tightly sucked into the borehole, making it impossible to lift the drill, resulting in a buried drill accident, and making it impossible to carry out further operations. Summary of the invention

[0003] In view of the above problems, the present invention provides a device for preventing and alleviating rock dust burial in coalfield drilling, comprising a suction pipe, a rope, a winch and a plurality of support detection rings, wherein the plurality of support detection rings are arranged from top to bottom along the borehole, and there is a spacing between adjacent support detection rings. The top of the rope is connected to the winch on the ground, and the lower part is connected to each support detection ring in sequence, and each support detection ring is lowered or lifted by the winch;

[0004] The top of the suction pipe is connected to the mud and water collection device on the ground, and the lower part is connected to each support detection ring in turn. The bottom of the suction pipe is connected to the lowest support detection ring to absorb the rock powder under the lowest support detection ring; a pump is provided on the support detection ring, and the pump on each support detection ring is connected to the suction pipe to provide power for absorbing the material containing rock powder in the borehole.

[0005] Optionally, the cross section of the support detection ring is circular and hollow inside; a plurality of connecting rings are provided on the vertical side of the support detection ring for connecting the rope; a pump is provided on the upper surface of the support detection ring for connecting the suction pipe portion passing through the support detection ring;

[0006] The lower surface of the support detection ring is provided with several density detectors, which are used to monitor the density of rock cuttings in the borehole in real time, determine the density of rock cuttings at different depths, and then determine whether rock powder needs to be sucked out;

[0007] A plurality of moving legs are arranged on the vertical side surface of the supporting detection ring, and a roller is arranged at one end of the moving leg pointing to the inner wall of the borehole. The moving leg can rotate so that the roller can roll vertically or horizontally along the inner wall of the borehole.

[0008] Further optionally, a plurality of connecting rings are evenly distributed along the circumference of the supporting detection ring, and the hollow annular surface of the connecting ring is horizontally arranged to facilitate the rope to pass through the connecting ring in the vertical direction;

[0009] The connecting rings of a plurality of supporting detection rings at the same corresponding positions are arranged in a vertical line, and the connecting rings on the vertical line are connected to the same rope; one rope is connected to one winch correspondingly.

[0010] Further optionally, a circle of movable tracks is provided next to the wellhead of the borehole, and several winches are slidably connected to the movable tracks. When each winch rotates along the movable tracks at the same speed, all supporting detection rings and suction tubes can be driven to rotate in the borehole through several ropes, so as to monitor the concentration of rock cuttings at various positions in the borehole, and the suction tube can absorb rock powder at various positions.

[0011] Further optionally, the plurality of density detectors are evenly arranged along the circumference of the support detection ring and form a circle, and the circle is concentrically arranged with the support detection ring.

[0012] Further optionally, a plurality of movable legs are evenly arranged along the circumference of the support detection ring, and the positions of the movable legs and the connecting ring are staggered with each other; the lengths of each movable leg extending out of the support detection ring are the same, and the support detection ring is concentrically arranged with the center of the borehole, so that the rollers of each movable leg contact the inner wall of the borehole and can roll along the inner wall of the borehole.

[0013] Optionally, a rotatable motor is provided inside the support detection ring, and a lifting and rotating device is connected to the bottom of the motor. The motor's rotating shaft is horizontally arranged and points to the inner wall of the support detection ring. Gear 1 is sleeved on the rotating shaft, and gear 2 is sleeved on the part of the moving leg extending into the support detection ring. Gear 1 and gear 2 are both vertically arranged. When the rotating shaft of the motor rotates to a direction corresponding to a certain moving leg, gear 1 meshes with gear 2 of the moving leg. The motor can drive the moving leg to rotate through the rotating shaft and two gears, thereby switching the hub of the roller between vertical and horizontal postures.

[0014] Optionally, the suction pipe is divided into several sections from top to bottom, each section is connected between two adjacent support detection rings, the inlet of the pump of the support detection ring is connected to the top of the next section of the suction pipe, and the outlet of the pump is connected to the bottom of the previous section of the suction pipe, thereby connecting the two adjacent sections of the suction pipe, providing power for the transportation of rock cuttings in each section of the suction pipe.

[0015] Optionally, a switch plate is provided at the bottom of the suction tube, the switch plate is arranged concentrically with the suction tube, and the diameter of the switch plate is slightly smaller than the inner diameter of the suction tube, so that the switch plate can rotate in the suction tube;

[0016] The switch plate is connected to the interior of the lowest support detection ring through a rotating rod. The rotating rod passes through the suction tube and the side of the support detection ring and enters the interior of the support detection ring. The part of the rotating rod inside the support detection ring is provided with gear three. Gear three is on the moving track of the motor shaft and can engage with gear one, so that the motor can control the rotation of the rotating rod and then control the rotation of the switch plate, so that the board surface of the switch plate can be switched between horizontal or vertical states. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a device for preventing and alleviating rock dust burial in coalfield drilling;

[0018] Figure 2 for Figure 1 A three-dimensional schematic diagram of

[0019] Figure 3 A schematic diagram of the lower surface of the support detection ring;

[0020] Figure 4 A schematic diagram of the interior of the support detection ring;

[0021] Figure 5 Schematic diagram of the switch board inside the motor control pipette.

[0022] In the accompanying drawings, 1-suction tube, 2-rope, 3-winch, 4-support detection ring, 5-drill hole, 6-pump, 7-connecting ring, 8-density detector, 9-moving leg, 10-roller, 11-moving track, 12-motor, 13-lifting and rotating device, 14-rotating shaft, 15-gear one, 16-gear two, 17-switch plate, 18-rotating rod, 19-gear three. DETAILED DESCRIPTION

[0023] This embodiment provides a device for preventing and alleviating rock dust burial in coalfield drilling. Figure 1-Figure 5 As shown, it includes a suction tube 1, a rope 2, a winch 3 and a plurality of support detection rings 4, wherein the plurality of support detection rings 4 are arranged from top to bottom along a borehole 5, and there is a spacing between adjacent support detection rings. The top of the rope 2 is connected to the winch 3 on the ground, and the bottom is connected to each support detection ring 4 in sequence, and each support detection ring is lowered or lifted by the winch 3;

[0024] The top of the suction pipe 1 is connected to the mud and water collection device on the ground, and the lower part is connected to each support detection ring 4 in sequence. The bottom of the suction pipe 1 is connected to the lowest support detection ring to absorb the rock powder under the lowest support detection ring; a pump 6 is provided on the support detection ring 4, and the pump on each support detection ring is connected to the suction pipe 1 to provide power for absorbing the material containing rock powder in the borehole 5.

[0025] Optionally, the cross section of the support detection ring 4 is circular and hollow inside; a plurality of connecting rings 7 are provided on the vertical side of the support detection ring 4 for connecting the rope 2; a pump 6 is provided on the upper surface of the support detection ring 4 for connecting the part of the suction tube 1 passing through the support detection ring;

[0026] The lower surface of the support detection ring 4 is provided with a plurality of density detectors 8 for real-time monitoring of the density of rock cuttings in the borehole 5, determining the density of rock cuttings at different depths, and further determining whether rock powder needs to be sucked out;

[0027] A plurality of movable legs 9 are provided on the vertical side surface supporting the detection ring 4 . A roller 10 is provided at one end of the movable leg 9 pointing to the inner wall of the borehole 5 . The movable leg 9 is rotatable so that the roller 10 can roll vertically or horizontally along the inner wall of the borehole 5 .

[0028] Further optionally, a plurality of connecting rings 7 are evenly distributed along the circumference of the supporting detection ring 4, and the hollow annular surface of the connecting ring 7 is horizontally arranged to facilitate the rope 2 to pass through the connecting ring 7 in the vertical direction;

[0029] The connecting rings of a plurality of supporting and detecting rings 4 at the same corresponding positions are arranged in a vertical line, and the connecting rings on the vertical line are connected to the same rope 2 ; one rope is connected to one winch 3 correspondingly.

[0030] Further optionally, a circle of movable tracks 11 is provided next to the wellhead of the borehole 5, and several winches 3 are slidably connected to the movable tracks 11. When each winch 3 rotates along the movable tracks 11 at the same speed, all supporting detection rings 4 and suction tubes 1 can be driven to rotate in the borehole 5 through several ropes 2, so as to monitor the logistics concentration at various positions in the borehole 5, and the suction tube 1 absorbs the rock powder at various positions.

[0031] According to the characteristics of vertical drilling of the drill bit and drill rod in the borehole 5 (coal well), the present invention designs a circular support detection ring, and the drill bit and drill rod pass through the central hollow of each support detection ring. Each device does not affect each other and operates independently. The hoist on the ground is connected to the support detection ring through a rope. In the horizontal direction, the support detection ring is evenly pulled and lifted by a plurality of ropes. By controlling the unwinding and rewinding speed of each hoist, each support detection ring is kept in a horizontal state, and then the suction tube 1 can be kept in a vertical state to prevent the suction tube 1 from contacting and entangled with the drill bit and drill rod.

[0032] Further optionally, the plurality of density detectors 8 are evenly arranged along the circumference of the support detection ring 4 and form a circle, which is concentrically arranged with the support detection ring 4; the main part of the density detector 8 is placed inside the support detection ring, and the probe of the density detector 8 extends out of the lower surface of the support detection ring 4, which can not only monitor the rock cuttings density, but also protect the density detector as much as possible.

[0033] When the winch drives each support detection ring to rotate through the rope, the density detector also rotates accordingly, which can monitor the rock cuttings density at different heights and angles in the borehole 5, and comprehensively monitor the rock powder accumulation in the well. At the same time, the rotation of each support detection ring also plays a stirring role at different heights in the well. Since the drill bit and drill rod are concentrated in the center of the well for stirring, the closer to the inner wall of the well, the easier it is for rock powder to accumulate, and the more it needs to be stirred. The circular shape of the support detection ring is convenient for directly stirring the area close to the inner wall of the well to avoid rock powder accumulating in a certain place.

[0034] Further optionally, a plurality of moving legs 9 are evenly arranged along the circumference of the support detection ring 4, and the positions of the moving legs 9 and the connecting ring 7 are staggered; the length of each moving leg 9 extending out of the support detection ring is the same, and the support detection ring is concentrically arranged with the center of the borehole 5, so that the roller 10 of each moving leg 9 contacts the inner wall of the borehole 5 and can roll along the inner wall of the borehole 5. Preferably, the moving legs are located below the connecting ring.

[0035] Optionally, a rotatable motor 12 is provided inside the support detection ring 4, and a lifting and rotating device 13 is connected to the bottom of the motor 12. The rotating shaft 14 of the motor 12 is horizontally arranged and points to the inner wall of the support detection ring 4. A gear 15 is sleeved on the rotating shaft 14, and a gear 2 16 is sleeved on the part of the moving leg 9 extending into the support detection ring. Both gear 15 and gear 2 16 are vertically arranged. When the rotating shaft 14 of the motor 12 rotates to a direction corresponding to a certain moving leg, gear 15 and gear 2 16 of the moving leg engage. The motor 12 can drive the moving leg to rotate through the rotating shaft 14 and the two gears, so that the hub of the roller can switch between vertical and horizontal postures.

[0036] Further optionally, the lifting and rotating device 13 is fixed on the bottom surface inside the support detection ring 4, and a movable platform is provided on the top of the lifting and rotating device 13. The motor 12 is provided on the movable platform and rotates and rises and falls with the movable platform; an electromagnetic device is provided inside the lifting and rotating device 13, which can control the lifting and lowering of the movable platform to a preset height and rotation to a preset angle, which belongs to the prior art.

[0037] When each support detection ring descends or ascends in the borehole 5, the hub of the roller is vertical, so that the wheel surface (with a rubber tire) directly contacts the inner wall of the borehole 5, and the roller rolls along the inner wall of the borehole 5, stabilizing the support detection ring in the horizontal direction to prevent it from shaking and the rope from being entangled with the drill rod. The initial state of the movable platform of the lifting and rotating device 13 is at the set lowest position, the rotating shaft 14 of the motor 12 is between two adjacent moving legs, and the positions of gear 1 15 and gear 2 are staggered. When each support detection ring needs to rotate in the borehole 5, the movable platform rises to the set highest position, the shaft 14 is higher than each moving leg, the movable platform drives the motor 12 to rotate to the angle position corresponding to a moving leg, the shaft 14 is directly above the moving leg, the motor 12 drives the gear 15 to rotate, the movable platform is lowered back to the set lowest position, the gear 15 meshes with the gear 2, and drives the gear 2 to rotate, the gear 2 drives the moving leg to rotate 90 degrees, so that the roller hub is horizontal, at this time the winch drives each support detection ring to rotate through the rope, the roller can also roll on the inner wall of the borehole 5 along the circumference of the borehole 5, so that the support detection ring rotates more smoothly. Control the moving speed of the ground winch, increase the strength of the rope (for example, use a steel cable), and avoid too large a difference in the rotation of the upper and lower support detection rings, that is, too large a difference in the upper and lower positions of the same steel cable.

[0038] Optionally, the suction tube 1 is divided into several sections from top to bottom, each section is connected between two adjacent support detection rings, the inlet of the pump of the support detection ring is connected to the top of the next section of the suction tube 1, and the outlet of the pump is connected to the bottom of the previous section of the suction tube 1, thereby connecting the two adjacent sections of the suction tube 1, providing power for the transportation of materials in each section of the suction tube 1.

[0039] When in use, in the borehole 5 (in the well), each support detection ring is gradually lowered as the drill bit drills downward. The lowest support detection ring is at a suitable distance from the top of the drill bit, which does not affect the operation of the drill bit and can timely measure the density of the circulating fluid and rock cuttings above the drill bit (i.e., the rock powder situation). The density detector of the support detection ring monitors the density of the circulating fluid and rock cuttings below in real time. The support detection ring can be rotated by a winch so that the density detector can monitor the density of the circulating fluid and rock cuttings at different positions (or angles), thereby indirectly indicating whether there is too much rock powder in various places. The density detector is connected to the data analysis device on the ground for communication, and the data measured by each density detector is recorded and analyzed in real time. If the density measured by one or several density detectors is too large, the support detection ring is rotated in time to supplement the detection data, eliminate measurement errors, and temporary rock powder concentration in a certain place. If the test result is still high in density after the supplementary test and exceeds the buried drill warning value, it is necessary to start the suction tube 1. According to the principle of gravity, the amount of rock powder near the lowest support detection ring must be greater than the amount of rock powder at any position above, so the bottom end of the suction tube 1 connected to the lowest support detection ring should absorb the rock powder.

[0040] The pumps on each support detection ring are started, the bottom end of the suction tube 1 is opened, the circulating fluid containing rock powder is sucked, and it is separately directed to the mud and water collection device on the ground, and then the mud and water are separated and the circulating fluid is recovered.

[0041] Optionally, a switch plate 17 is provided at the bottom of the suction tube 1, and the switch plate 17 is arranged concentrically with the suction tube 1, and the diameter of the switch plate 17 is slightly smaller than the inner diameter of the suction tube 1, so that the switch plate 17 can rotate in the suction tube 1;

[0042] The switch plate 17 is connected to the interior of the lowest support detection ring through a rotating rod 18. The rotating rod 18 passes through the suction tube 1 and the side of the support detection ring and enters the interior of the support detection ring. The part of the rotating rod 18 inside the support detection ring is provided with a gear three 19. The gear three 19 is on the moving track of the rotating shaft 14 of the motor 12 and can engage with the gear one 15, so that the motor 12 can control the rotation of the rotating rod 18, thereby controlling the rotation of the switch plate 17, so that the board surface of the switch plate 17 can switch between a horizontal or vertical state.

[0043] When the switch plate 17 is placed horizontally, it covers the cross section of the suction tube 1, preventing most of the circulating fluid from passing through the suction tube 1. When the suction tube 1 needs to be opened, the lifting and rotating device 13 controls the movable platform to rise to the set highest position, the rotating shaft 14 is higher than the rotating rod 18, and the movable platform drives the motor 12 to rotate to the angle position of the rotating rod 18, and the rotating shaft 14 is directly above the corresponding position. The motor 12 drives the gear 15 to rotate, and the movable platform is lowered back to the set lowest position. The gear 15 is meshed with the gear 3 19 (the rotating rod 18 is at the same height as the moving leg), and drives the gear 3 19 to rotate. The gear 3 19 drives the rotating rod 18 to rotate 90 degrees, so that the switch plate 17 rotates 90 degrees, and the surface of the switch plate 17 is in a vertical state, so that the bottom end of the suction tube 1 is open.

Claims

1. A device for preventing and alleviating rock dust burial in coalfield drilling, characterized in that: It includes a suction tube, a rope, a winch and a plurality of support detection rings, wherein the plurality of support detection rings are arranged from top to bottom along the borehole, and there is a spacing between adjacent support detection rings. The top of the rope is connected to the winch on the ground, and the lower part is connected to each support detection ring in turn, and each support detection ring is lowered or lifted by the winch; The top of the suction pipe is connected to the mud and water collection device on the ground, and the lower part is connected to each support detection ring in turn. The bottom of the suction pipe is connected to the lowest support detection ring to absorb the rock powder under the lowest support detection ring; a pump is provided on the support detection ring, and the pump on each support detection ring is connected to the suction pipe to provide power for absorbing the material containing rock powder in the borehole.

2. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 1 is characterized in that: The cross section of the support and detection ring is circular and hollow inside; a plurality of connecting rings are provided on the vertical side of the support and detection ring for connecting the rope; a pump is provided on the upper surface of the support and detection ring for connecting the suction pipe part passing through the support and detection ring; The lower surface of the support detection ring is provided with several density detectors for real-time monitoring of the density of drilling cuttings, judging the density of cuttings at different depths, and then judging whether the rock powder needs to be sucked out; A plurality of moving legs are arranged on the vertical side surface of the supporting detection ring, and a roller is arranged at one end of the moving leg pointing to the inner wall of the borehole. The moving leg can rotate so that the roller can roll vertically or horizontally along the inner wall of the borehole.

3. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 2 is characterized in that: Several connecting rings are evenly distributed along the circumference of the supporting detection ring, and the hollow ring surface of the connecting ring is horizontally arranged to facilitate the rope to pass through the connecting ring in the vertical direction; The connecting rings of a plurality of supporting detection rings at the same corresponding positions are arranged in a vertical line, and the connecting rings on the vertical line are connected to the same rope; one rope is connected to one winch correspondingly.

4. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 3 is characterized in that: A circle of movable track is provided next to the wellhead of the borehole, and several winches are slidably connected to the movable track. When each winch rotates along the movable track at the same speed, it can drive all supporting detection rings and suction tubes to rotate in the borehole through several ropes, monitor the rock cuttings concentration at various positions in the borehole, and the suction tube absorbs rock powder at various positions.

5. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 2 is characterized in that: The plurality of density detectors are evenly arranged along the circumference of the support detection ring and form a circle, and the circle is concentrically arranged with the support detection ring.

6. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 3 is characterized in that: Several moving legs are evenly arranged along the circumference of the support detection ring, and the positions of the moving legs and the connecting ring are staggered; the lengths of each moving leg extending out of the support detection ring are the same, and the support detection ring is concentrically arranged with the center of the borehole, so that the rollers of each moving leg contact the inner wall of the borehole and can roll along the inner wall of the borehole.

7. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 6 is characterized in that: A rotatable motor is provided inside the support detection ring, and a lifting and rotating device is connected to the bottom of the motor. The motor's rotating shaft is arranged horizontally and points to the inner wall of the support detection ring. Gear 1 is sleeved on the rotating shaft, and gear 2 is sleeved on the part of the moving leg extending into the support detection ring. Gear 1 and gear 2 are both arranged vertically. When the rotating shaft of the motor rotates to a direction corresponding to a certain moving leg, gear 1 and gear 2 of the moving leg are meshed. The motor can drive the moving leg to rotate through the rotating shaft and two gears, thereby switching the hub of the roller between vertical and horizontal postures.

8. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 2 is characterized in that: The suction pipe is divided into several sections from top to bottom, each section is connected between two adjacent support detection rings, the inlet of the pump of the support detection ring is connected to the top end of the next section of the suction pipe, and the outlet of the pump is connected to the bottom end of the previous section of the suction pipe, thereby connecting the two adjacent sections of the suction pipe, providing power for the transportation of rock cuttings in each section of the suction pipe.

9. The device for preventing and alleviating rock dust burial in coalfield drilling according to claim 7, characterized in that: A switch plate is provided at the bottom of the suction tube, the switch plate is arranged concentrically with the suction tube, and the diameter of the switch plate is slightly smaller than the inner diameter of the suction tube, so that the switch plate can rotate in the suction tube; The switch plate is connected to the interior of the lowest support detection ring through a rotating rod. The rotating rod passes through the suction tube and the side of the support detection ring and enters the interior of the support detection ring. The part of the rotating rod inside the support detection ring is provided with gear three. Gear three is on the moving track of the motor shaft and can engage with gear one, so that the motor can control the rotation of the rotating rod and then control the rotation of the switch plate, so that the board surface of the switch plate can be switched between horizontal or vertical states.

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