Anti-recoil drill carriage

Abstract

The invention relates to the field of coal mining production, and discloses an anti-recoil drill carriage which comprises a drill carriage body, a drill rod is arranged on the drill carriage body, the drill rod comprises a first section and a second section which are communicated with each other, and the first section and the second section extend from the drill carriage body to the two sides of the drill carriage body respectively. The far end of the first section is arranged to introduce fracturing fluid into the drill hole; the anti-skid device comprises a connecting pipe and an anti-skid piece arranged on the outer wall of the connecting pipe, the connecting pipe communicates with the far end of the first section, and the anti-skid piece is arranged to abut against the inner wall of the drill hole so as to prevent displacement of the anti-skid device and the drill rod caused by back flushing of the fracturing fluid; and the energy absorption device communicates with the far end of the second section and is used for abutting against the roadway wall, and the energy absorption device can absorb recoil energy of the fracturing fluid when the fracturing fluid recoils into the second section. According to the technical scheme, when fracturing fluid recoil occurs, the drill carriage is integrally kept stable, the fracturing fluid recoil is prevented from damaging equipment, and the operation safety is improved.

Description

Technical Field

[0001] The present invention relates to the field of coal mining and production, and in particular to an anti-recoil drilling vehicle. Background Art

[0002] As coal mining depths and intensities continue to increase, abnormal pressure in coal mines is becoming increasingly prominent, necessitating the urgent need for effective pressure relief technologies. Hydraulic fracturing, which injects high-pressure fluid into the roof rock to weaken the hard roof and disperse stress concentrations, has become an important means of preventing and controlling severe mine pressure.

[0003] During traditional hydraulic fracturing, strict sealing technology is required. Improper operation can easily lead to high-pressure liquid recoil due to poor sealing quality or excessive pressure. The high-pressure liquid recoil generates a reaction force that causes the drill pipe to be ejected, which can easily cause personal injury and equipment damage, seriously threatening construction safety and reducing construction efficiency. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems in the conventional hydraulic fracturing process of the prior art, in which strict requirements are placed on the sealing process. Improper operation can easily lead to the recoil of high-pressure liquid due to poor sealing quality or excessive pressure. The recoil of high-pressure liquid generates a reaction force that causes the drill pipe to be ejected, which can easily cause personal injury and equipment damage, seriously threatening construction safety and reducing construction efficiency.

[0005] To achieve the above objectives, the present invention provides, in one aspect, an anti-recoil drilling rig, comprising: a rig body, a drill rod disposed on the rig body, the drill rod comprising a first section and a second section connected to each other, the first section and the second section respectively extending from the rig body to opposite sides of the rig body, the distal end of the first section being configured to introduce fracturing fluid into a borehole; an anti-skid device, the anti-skid device comprising a connecting pipe and an anti-skid member provided on the outer wall of the connecting pipe, the connecting pipe being connected to the distal end of the first section, the anti-skid member being arranged to abut against the inner wall of the borehole to prevent displacement of the anti-skid device and the drill pipe caused by backwash of the fracturing fluid; and The energy absorbing device is connected to the far end of the second section and is used to press against the tunnel wall. The energy absorbing device can absorb the energy of the fracturing fluid when the fracturing fluid rebounds into the second section.

[0006] In some embodiments, the anti-slip member includes a plurality of anti-slip feet, which are circumferentially spaced apart on the outer wall of the connecting pipe and abut against the inner wall of the drill hole to prevent the anti-slip device and the drill rod from shifting.

[0007] In some embodiments, the anti-slip device also includes a plurality of mounting plates and a driving mechanism. The mounting plates are arranged at intervals along the circumference of the connecting tube and are rotatably connected to the connecting tube around a rotating shaft extending tangentially along the connecting tube. The mounting plate includes a first surface and a second surface. The anti-slip support feet are vertically arranged on the first surface. The outer ends of the anti-slip support feet are recessed inward and correspond to the shape of the outer wall of the connecting tube. The driving mechanism can drive the mounting plate to rotate between a use position and a storage position. When in the use position, the mounting plate extends in the direction of the first section so that the second surface is attached to the outer wall of the connecting tube and the anti-slip support feet extend radially outward along the connecting tube. When in the storage position, the mounting plate extends in a direction away from the first section so that the anti-slip support feet extend radially inward along the connecting tube and attach to the outer wall of the connecting tube.

[0008] In some embodiments, the driving mechanism includes a traction chain, a traction ring and a fixing member. The traction ring is arranged on the outside of the connecting tube. One end of the traction chain is connected to the second surface, and the other end is connected to the traction ring. The traction ring can move along the length direction of the connecting tube and drive the mounting plate to rotate through the traction chain. A fixing member is provided between the traction ring and the connecting tube to lock the position of the mounting plate when the second surface is against the outer wall of the connecting tube.

[0009] In some embodiments, the anti-slip device also includes a ring, which is fixedly mounted on the outside of the connecting tube, and the mounting plate is rotatably connected to the outside of the ring. Limit blocks are provided on the outer walls of the connecting tube on both sides of the ring to prevent the ring from moving along the length direction of the connecting tube.

[0010] In some embodiments, the energy absorbing device includes an energy absorbing block and a shock absorbing mechanism. One end of the energy absorbing block is connected to the second section to absorb the energy of the fracturing fluid recoil in the second section, and the other end is connected to the shock absorbing mechanism. The end of the shock absorbing mechanism away from the energy absorbing block is against the tunnel wall to reduce the vibration caused by the fracturing fluid recoil.

[0011] In some embodiments, a liquid supply channel is provided in the energy absorbing block, the liquid supply channel is connected between the second section and the liquid supply pipeline, and the liquid supply pipeline can supply fracturing fluid into the liquid supply channel.

[0012] In some embodiments, the shock absorbing mechanism includes a connecting member, a shock absorber and a fitting head, the connecting member is connected to the energy absorbing block, the fitting head is against the tunnel wall, and the shock absorber is connected between the connecting member and the fitting head.

[0013] In some embodiments, the shock absorber includes: a shock absorbing shell, wherein one end of the shock absorbing shell is open, and an end away from the opening is connected to the connecting member; A support rod, one end of which extends into the opening of the shock-absorbing shell, and divides the shock-absorbing shell into a first section provided with the support rod and a second section not provided with the support rod along the length direction, and the other end of the support rod is connected to the fitting head; The first spring is arranged in the second section, one end of the first spring is connected to the inner wall of the shock-absorbing shell and is parallel to the support rod. When the shock-absorbing shell moves toward the fitting head, the first spring can be pressed against the support rod and compressed to reduce shock.

[0014] In some embodiments, the shock absorber also includes a second spring and a pressure plate. The second spring is mounted outside the support rod, and the pressure plate is connected to the inner wall of the first section. The pressure plate is against the end of the second spring away from the fitting head, and can compress the second spring to reduce shock when the shock absorbing shell moves closer to the fitting head.

[0015] In some embodiments, a blocking piece is provided at one end of the support rod close to the first spring, and when the shock absorbing shell moves away from the fitting head, the blocking piece can stop the pressure piece to prevent the shock absorbing shell from falling off the support rod.

[0016] Through the above technical solution, the present invention arranges the drill rod on the drilling vehicle into a first section close to the borehole and a second section close to the tunnel wall, arranges an anti-skid device between the first section and the borehole, and arranges an energy-absorbing device between the second section and the tunnel wall, and the fracturing fluid is sequentially injected into the borehole through the drill rod and the anti-skid device. When the high-pressure liquid flows back toward the drill rod, the anti-skid device abuts against the inner wall of the anti-skid hole, which can prevent the anti-skid device and the drill rod from shifting, thereby avoiding damage caused by the displacement of the drill rod; the high-pressure liquid enters the drill rod through the anti-skid device, and when it reaches the energy-absorbing device through the second section, the energy of the high-pressure liquid recoil is absorbed by the energy-absorbing device and the tunnel wall, reducing the vibration of the entire drill rod, and preventing the energy-absorbing device and the drill rod from shifting by the tunnel wall. When fracturing fluid backwash occurs, the drilling vehicle as a whole remains stable, preventing backwash damage to the equipment, and improving operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an anti-recoil drilling vehicle according to an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of part A; Figure 3 is a structural diagram of an anti-skid device according to an embodiment of the present invention; Figure 4 yes Figure 3 A top view of Figure 5 is a schematic diagram of the mounting plate according to an embodiment of the present invention rotated to a use state; Figure 6 is a schematic diagram of the mounting plate according to an embodiment of the present invention rotated to a storage state; Figure 7 is a side view of an anti-slip foot according to an embodiment of the present invention; Figure 8 yes Figure 1 Enlarged view of part B; Figure 9 This is a structural diagram of an energy absorbing block according to an embodiment of the present invention; Figure 10 It is a structural diagram of the shock absorbing mechanism according to an embodiment of the present invention.

[0018] Description of Reference Numerals 1. Drilling vehicle body; 2. First section; 3. Second section; 4. Anti-slip device; 41. Connecting pipe; 42. Anti-slip feet; 43. Mounting plate; 431. First surface; 432. Second surface; 44. Driving mechanism; 441. Traction chain; 442. Traction ring; 443. Fixing member; 45. Ring; 46. Limit block; 5. Energy absorbing device; 51. Energy absorbing block; 52. Liquid supply channel; 53. Shock-absorbing mechanism; 531. Connecting member; 532. Shock absorber; 5321. Shock-absorbing housing; 5321a. First section; 5321b. Second section; 5322. Support rod; 5323. First spring; 5324. Second spring; 5325. Pressure plate; 5326. Blocking plate; 533. Laminating head; 54. Liquid supply pipe; 55. Support foot; 6. Drilling; 7. Tunnel wall. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise indicated, directional terms such as "upper," "lower," "left," "right," "inner," and "outer" to indicate directions or positional relationships are used solely to facilitate description and simplify the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. When the absolute position of the objects being described changes, the relative positional relationships may also change accordingly.

[0020] In order to solve the problem in the conventional hydraulic fracturing process in the prior art that improper operation may easily lead to the recoil of high-pressure liquid due to poor sealing quality or excessive pressure, and the reaction force generated by the recoil of high-pressure liquid may cause the drill rod to rush out, which may easily cause personal injury, damage to equipment, seriously threaten construction safety, and reduce construction efficiency, the present invention provides an anti-recoil drilling vehicle. Figure 1 As shown, the anti-recoil drilling vehicle comprises: a drilling vehicle body 1, a drill rod is provided on the drilling vehicle body 1, the drill rod is connected to the drilling vehicle body 1 through the drill rod interface of the drilling vehicle body 1, a channel is provided inside the drill rod and a fracturing fluid is passed through the drill rod, and the drill rod comprises a first section 2 and a second section 3 that are connected to each other. The first section 2 and the second section 3 can be different partitions on the same drill rod, or can be as follows Figure 1As shown in FIG, multiple drill rods are arranged on the drilling vehicle body 1 and connected together, and the first section 2 and the second section 3 are one or more drill rods therein, respectively. Figure 1 As shown, the first section 2 and the second section 3 extend from the drilling vehicle body 1 to both sides of the drilling vehicle body 1, wherein the distal end of the first section 2 is arranged close to the borehole 6 and can be used to pass fracturing fluid into the borehole 6 for hydraulic fracturing; the anti-slip device 4, as shown Figure 2 As shown, the anti-skid device 4 includes a connecting pipe 41 and an anti-skid member provided on the outer wall of the connecting pipe 41. The connecting pipe 41 can be connected to the distal end of the first section 2 through a thread or a flange. The anti-skid member is arranged to abut against the inner wall of the borehole 6. The fracturing fluid can be introduced into the borehole 6 through the connecting pipe 41. When the fracturing fluid recoils, the recoil direction is opposite to the direction of the fracturing fluid being introduced, that is, along the Figure 1 In the process of recoil from the borehole 6 to the first section 2, the anti-skid part can prevent the anti-skid device 4 and the drill pipe from shifting due to the recoil of the fracturing fluid; and the energy absorbing device 5, the energy absorbing device 5 is connected to the far end of the second section 3, and is arranged between the second section 3 and the tunnel wall 7. The energy absorbing device 5 is pressed against the tunnel wall 7. When the fracturing fluid recoils into the second section 3, the energy absorbing device 5 can absorb the energy of the fracturing fluid recoil, and due to the limitation of the tunnel wall 7, the energy absorbing device 5 and the second section 3 can remain stable and not shift.

[0021] Through the above technical solution, the present invention arranges the drill rod on the drilling vehicle into a first section 2 close to the borehole and a second section 3 close to the tunnel wall, arranges an anti-skid device 4 between the first section 2 and the borehole, and arranges an energy absorption device 5 between the second section 3 and the tunnel wall 7, and the fracturing fluid is injected into the borehole through the drill rod and the anti-skid device 4 in sequence. When high-pressure liquid rushes out from the borehole toward the drill pipe, part of the fracturing fluid flows through the channel inside the connecting pipe 41 to the first section 2, and part of the fracturing fluid impacts the pipe wall at the end of the connecting pipe 41. The anti-skid member can prevent the anti-skid device 4 from shifting due to the fracturing fluid acting on the connecting pipe 41, as well as the displacement caused by the vibration caused by the change in the flow direction of the fracturing fluid inside the connecting pipe 41, so that the anti-skid device 4 remains stable and does not shift, thereby preventing the displacement of the drill pipe and avoiding equipment damage caused by the displacement of the drill pipe. The high-pressure liquid enters the drill pipe through the anti-skid device 4. When it reaches the energy absorbing device 5 through the second section 3, the energy of the high-pressure liquid recoil is absorbed by the energy absorbing device 5, reducing the vibration of the drill pipe, and limiting the displacement of the energy absorbing device 5 and the drill pipe through the obstruction of the tunnel wall 7. When the fracturing fluid recoils, the drilling vehicle as a whole remains stable, preventing the recoil from damaging the equipment and improving the safety of the operation.

[0022] In some embodiments, as Figure 2As shown, the anti-slip member includes multiple anti-slip legs 42, which are circumferentially spaced along the outer wall of the connecting tube 41 and abut against the inner wall of the borehole 6, preventing the anti-slip device 4 and the drill rod from shifting. In this embodiment, to facilitate connection of the anti-slip device 4 to the borehole 6, the diameter of the borehole 6 near the exit is set larger than the inner diameter. Anti-slip legs 42 are selected to match the diameter of the borehole 6 exit, and the outer diameter of the connecting tube 41 is set to match the inner diameter of the borehole 6. During use, the outlet end of the connecting tube 41 is inserted into the borehole 6, and the anti-slip legs 42 abut against the inner wall of the borehole 6 at the exit. The anti-slip part is not limited to being set as an anti-slip support foot, but can also be set as an anti-slip and wear-resistant material that fits the outer wall of the connecting pipe 41, such as rubber. When the anti-slip part is a rubber pad set on the outer wall of the connecting pipe 41, the aperture of the inner and exit positions of the drill hole 6 is set to be the same, and the connecting pipe 41 is directly extended into the drill hole 6 to fit the inner wall of the drill hole 6.

[0023] In some embodiments, for ease of use, such as Figure 3 and Figure 4 As shown, the anti-skid device 4 further includes a plurality of mounting plates 43 and a driving mechanism 44. The mounting plates 43 are arranged at intervals along the circumference of the connecting tube 41 and are rotatably connected to the connecting tube 41 around a rotating shaft extending in the tangential direction of the connecting tube 41. Figure 5 and Figure 6 As shown, the mounting plate 43 includes a first surface 431 and a second surface 432. The anti-slip legs 42 are vertically arranged on the first surface 431. Figure 7 As shown, the shape of the anti-slip foot 42 is set to be concave inward at the outer end and corresponds to the shape of the outer wall of the connecting pipe 41. The driving mechanism 44 can drive the mounting plate 43 to rotate between the use position and the storage position. In the use position, as shown in FIG. Figure 5 As shown, the mounting plate 43 extends in the direction of the first section 2, so that the second surface 432 is in contact with the outer wall of the connecting tube 41, and the anti-slip legs 42 extend radially outward along the connecting tube 41 and are supported on the inner wall of the drill hole 6; when in the storage position, as shown Figure 6 As shown, the mounting plate 43 extends away from the first section 2 so that the anti-slip legs 42 extend radially inwardly along the connecting tube 41 and adhere to the outer wall of the connecting tube 41. Alternatively, the mounting plate 43 and the drive mechanism 44 may be omitted, and the anti-slip legs 42 may be directly fixed to the outer wall of the connecting tube 41.

[0024] In some embodiments, as Figure 7 As shown, in order to improve the anti-skid effect of the anti-skid support leg 42, the portion where the outer end of the anti-skid support leg 42 contacts the drill hole 6 is set to a zigzag shape, or any other effective anti-skid pattern.

[0025] In some embodiments, as Figure 5As shown, the drive mechanism 44 includes a traction chain 441, a traction ring 442, and a fixing member 443. The traction ring 442 is sleeved on the outside of the connecting tube 41. One end of the traction chain 441 is connected to the second surface 432, and the other end is connected to the traction ring 442. The traction ring 442 can move along the length of the connecting tube 41 and drive the mounting plate 43 to rotate via the traction chain 441. When the mounting plate 43 is rotated to the use position, the fixing member 443 between the traction ring 442 and the connecting tube 41 fixes the traction ring 442 in place, thereby locking the mounting plate 43 in place. At this point, the traction chain 441 is fully extended, and the anti-slip legs 42 are fixed to the outer wall of the connecting tube 41.

[0026] In some embodiments, the fixing member 443 includes an opening in the traction ring 442 and a buckle on the outer wall of the connecting tube 41. The buckle and the opening correspond to each other and cooperate to fix the position of the traction ring 442. The buckle can be configured in any shape, preferably a spring with a hook. The hook can hook onto the opening in the traction ring 442, securing the traction ring 442 to the outer wall of the connecting tube 41. The deformation of the spring also provides a buffering effect, preventing the anti-slip device 4 from being damaged by the excessive impact force of the fracturing fluid. Without a special-shaped spring with a buffering function, the anti-slip device 4 is rigid as a whole. If the impact force of the fracturing fluid is too strong, it will act on the rigid anti-slip device 4, causing damage to the anti-slip device 4 due to the excessive impact force.

[0027] In some embodiments, as Figure 3 and Figure 4 As shown, the anti-skid device 4 also includes a collar 45, which can be fixedly sleeved on the outside of the connecting pipe 41 by bolts or welding, and the mounting plate 43 is rotatably connected to the outside of the collar 45 by a hinge structure or a universal joint. Limit blocks 46 are provided on the outer walls of the connecting pipe 41 on both sides of the collar 45. The limit blocks 46 can prevent the collar 45 from moving along the length direction of the connecting pipe 41, thereby preventing the collar 45 from being displaced due to excessive recoil impact force of the fracturing fluid, thereby causing displacement of the entire anti-skid device 4.

[0028] In some embodiments, as Figure 8 As shown, the energy absorbing device 5 includes an energy absorbing block 51 and a shock absorbing mechanism 53. One end of the energy absorbing block 51 is connected to the second section 3 for absorbing the energy of the fracturing fluid recoil in the second section 3, and the other end is connected to the shock absorbing mechanism 53. The end of the shock absorbing mechanism 53 away from the energy absorbing block 51 is against the tunnel wall 7, which can reduce the vibration caused by the recoil of the fracturing fluid.

[0029] In some embodiments, as Figure 9As shown, a liquid supply channel 52 is provided in the energy absorbing block 51. The liquid supply channel 52 is connected between the second section 3 and the liquid supply pipe 54. The liquid supply pipe 54 is connected to the fracturing fluid supply pipe and can introduce fracturing fluid into the liquid supply channel 52. The liquid supply channel 52 is a curved pipe. When the fracturing fluid recoils, the energy of the fracturing fluid is absorbed by the energy absorbing block 51 when it reaches the corner of the liquid supply channel 52, and the flow rate of the fracturing fluid slows down. Compared with a straight pipe, it avoids the fracturing fluid from directly rushing into the liquid supply pipe 54 and damaging the liquid supply equipment. When the fracturing fluid recoils, it enters the energy absorbing block 51 through the liquid supply channel 52, causing the energy absorbing block 51 to vibrate, and the vibration of the energy absorbing block 51 is reduced by the shock absorbing mechanism 53, so that the second section 3 remains stable.

[0030] In some embodiments, as Figure 10 As shown, the shock absorbing mechanism 53 includes a connecting member 531, a shock absorber 532 and a bonding head 533. The connecting member 531 is connected to the energy absorbing block 51, the bonding head 533 is against the tunnel wall 8, and the shock absorber 532 is connected between the connecting member 531 and the bonding head 533. Figure 9 and Figure 10 As shown, connector 531 is a cylindrical block or hollow tube with external threads. Energy absorbing block 51 is provided with a corresponding groove with internal threads. Connector 531 is threadedly connected to energy absorbing block 51. Multiple damping mechanisms 53 are provided outside energy absorbing block 51. The distribution of damping mechanisms 53 on energy absorbing block 51 can be adjusted based on the location and amplitude of vibration of energy absorbing block 51 to maximize the damping effect of damping mechanisms 53.

[0031] In some embodiments, as Figure 10 As shown, the shock absorber 532 includes: a shock absorbing shell 5321, one end of the shock absorbing shell 5321 is open, and the end away from the opening is connected to the connecting member 531; a support rod 5322, one end of the support rod 5322 extends into the opening of the shock absorbing shell 5321, and the shock absorbing shell 5321 is divided into a first section 5321a provided with the support rod 5322 and a second section 5321b without the support rod 5322 along the length direction, and the other end of the support rod 5322 is connected to the fitting head 533; a first spring 5323, the first spring 5323 is arranged in the second section 5321b, one end of the first spring 5323 is connected to the inner wall of the shock absorbing shell 5321 and is parallel to the support rod 5322, and the other end can be fixedly connected to the support rod 5322, or as shown in FIG. Figure 10 As shown, the shock absorbing shell 5321 is spaced apart from the support rod 5322. When the fracturing fluid recoils and causes the energy absorbing block 51 to vibrate, the shock absorbing shell 5321 moves toward the fitting head 533, so that the first spring 5323 abuts against the support rod 5322 and compresses the first spring 5323 to reduce shock.

[0032] In some embodiments, the shock absorber 532 further includes a second spring 5324 and a pressure plate 5325. The second spring 5324 is sleeved around the support rod 5322, and the pressure plate 5325 is connected to the inner wall of the first section 5321a. The pressure plate 5325 can be in any shape, such as an annular, arcuate, or square shape. The pressure plate 5325 abuts against the end of the second spring 5324 away from the fitting head 533, and can cause the shock absorbing shell 5321 to abut against the second spring 5324 when it moves toward the fitting head 533, compressing the second spring 5324 to reduce shock. The shock absorber 532 of the present invention employs a dual shock-absorbing design of the first spring 5323 and the second spring 5324, significantly improving energy absorption and effectively extending the service life of the device.

[0033] In some embodiments, since the shock-absorbing shell 5321 will vibrate back and forth in the direction close to the fitting head 533 and away from the fitting head 533 when vibrating, in order to prevent the shock-absorbing shell 5321 from falling out of the support rod 5322 when moving in the direction away from the fitting head 533, a baffle 5326 is provided at one end of the support rod 5322 close to the first spring 5323. The width of the baffle 5326 is greater than the distance between the outer ends of the pressure plate 5325. When the shock-absorbing shell 5321 moves in the direction away from the fitting head 533, the baffle 5326 stops at the pressure plate 5325 to prevent the shock-absorbing shell 5321 from falling out of the support rod 5322.

[0034] In some embodiments, as Figure 8 As shown, the energy absorbing device 5 further includes support legs 55 disposed below the energy absorbing block 51. The support legs 55 elevate the energy absorbing block 51 to facilitate connection to the liquid supply pipe 54 below. The support legs 55 are height-adjustable, utilizing a hydraulic system to achieve a lifting function, thereby better adapting to uneven roadway surfaces.

[0035] The following describes in detail the anti-recoil mechanism of the anti-recoil drilling vehicle of an embodiment of the present invention when fracturing fluid backwash occurs. First, the anti-recoil drilling vehicle of the present invention introduces fracturing fluid through the liquid supply pipe 54 below the energy absorbing block 51. The fracturing fluid then passes through the liquid supply channel 52, the second section 3, the first section 2, and the anti-skid device 4 in sequence and enters the borehole 6. When the fracturing fluid backwashes, the fracturing fluid rushes out toward the anti-skid device 4 and the first section 2. A portion of the fracturing fluid enters the first section 2 through the channel of the anti-skid device 4, and a portion of the fluid impacts the pipe wall at the end of the connecting pipe 41. Due to the action of the anti-skid support feet 42, the anti-skid device 4 will not shift, thereby offsetting the impact force of the backwash fluid on the anti-skid device 4. The fracturing fluid recoils from the first section 2 into the second section 3 and enters the energy absorbing block 51. The instantaneous impact force of the recoil fluid causes the energy absorbing block 51 to shake, compressing the spring of the shock absorbing mechanism 53 and pressing the shock absorbing mechanism 53 against the tunnel wall 7. After the instantaneous impact, the spring of the shock absorbing mechanism 53 rebounds and gradually returns to its initial state. During this process, the energy absorbing device 5 absorbs the energy of the fracturing fluid recoil, so that the second section 3 remains stable. Therefore, the entire drilling vehicle can remain stable when fracturing fluid recoil occurs. The anti-recoil drilling vehicle of the present invention can also be equipped with a detector, which issues an alarm when fracturing fluid recoil is detected. At the moment of fracturing fluid recoil, the anti-skid device 4 and the energy absorbing device 5 protect the various components of the drilling vehicle from damage, and the staff handles the on-site situation after receiving the alarm.

[0036] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, the technical solution of the present invention may be subjected to a variety of simple modifications, including combining the various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. An anti-recoil drilling vehicle, characterized in that: include: A drilling rig body (1), wherein the drilling rig body (1) is provided with a drill rod, wherein the drill rod comprises a first section (2) and a second section (3) which are connected to each other, wherein the first section (2) and the second section (3) extend from the drilling rig body (1) to both sides of the drilling rig body (1), respectively, and the distal end of the first section (2) is configured to allow fracturing fluid to be introduced into a borehole (6); an anti-skid device (4), the anti-skid device (4) comprising a connecting pipe (41) and an anti-skid member provided on an outer wall of the connecting pipe (41), the connecting pipe (41) being connected to the distal end of the first section (2), the anti-skid member being arranged to abut against an inner wall of a borehole (6) to prevent the anti-skid device (4) and the drill pipe from being displaced due to backwash of the fracturing fluid; and An energy absorbing device (5) is connected to the distal end of the second section (3) and is used to press against the tunnel wall (7). The energy absorbing device (5) can absorb the energy of the fracturing fluid when the fracturing fluid recoils into the second section (3).

2. The anti-recoil drilling vehicle according to claim 1, characterized in that: The anti-slip member comprises a plurality of anti-slip legs (42), which are circumferentially spaced apart on the outer wall of the connecting pipe (41) and abut against the inner wall of the drill hole (6) to prevent the anti-slip device (4) and the drill rod from shifting.

3. The anti-recoil drilling vehicle according to claim 2, characterized in that: The anti-slip device (4) further includes a plurality of mounting plates (43) and a driving mechanism (44), wherein the mounting plates (43) are arranged at intervals along the circumference of the connecting tube (41) and are rotatably connected to the connecting tube (41) around a rotating shaft extending in the tangential direction of the connecting tube (41), and the mounting plates (43) include a first surface (431) and a second surface (432), and the anti-slip support leg (42) is vertically arranged on the first surface (431), and the outer end of the anti-slip support leg (42) is recessed inwardly and corresponds to the shape of the outer wall of the connecting tube (41), and the driving mechanism (44) is capable of driving the anti-slip support leg (42) to rotate relative to the connecting tube (41). The mounting plate (43) is rotated between a use position and a storage position. In the use position, the mounting plate (43) extends in the direction of the first section (2) so that the second surface (432) is attached to the outer wall of the connecting tube (41) and the anti-slip support foot (42) extends radially outwardly along the connecting tube (41). In the storage position, the mounting plate (43) extends in a direction away from the first section (2) so that the anti-slip support foot (42) extends radially inwardly along the connecting tube (41) and is attached to the outer wall of the connecting tube (41).

4. The anti-recoil drilling vehicle according to claim 3, characterized in that: The driving mechanism (44) includes a traction chain (441), a traction ring (442) and a fixing member (443). The traction ring (442) is sleeved on the outside of the connecting tube (41). One end of the traction chain (441) is connected to the second surface (432), and the other end is connected to the traction ring (442). The traction ring (442) can move along the length direction of the connecting tube (41) and drive the mounting plate (43) to rotate through the traction chain (441). A fixing member (443) is provided between the traction ring (442) and the connecting tube (41) so that the position of the mounting plate (43) is locked when the second surface (432) abuts against the outer wall of the connecting tube (41).

5. The anti-recoil drilling vehicle according to claim 3, characterized in that: The anti-slip device (4) further comprises a collar (45), wherein the collar (45) is fixedly sleeved on the outside of the connecting tube (41), and the mounting plate (43) is rotatably connected to the outside of the collar (45). Limiting blocks (46) are provided on the outer walls of the connecting tube (41) on both sides of the collar (45) to prevent the collar (45) from moving along the length direction of the connecting tube (41).

6. The anti-recoil drilling vehicle according to claim 1, characterized in that: The energy absorbing device (5) comprises an energy absorbing block (51) and a shock absorbing mechanism (53), one end of the energy absorbing block (51) is connected to the second section (3) to absorb the energy of the fracturing fluid recoil in the second section (3), and the other end is connected to the shock absorbing mechanism (53), and the end of the shock absorbing mechanism (53) away from the energy absorbing block (51) abuts against the tunnel wall (7) to reduce the vibration caused by the fracturing fluid recoil.

7. The anti-recoil drilling vehicle according to claim 6, characterized in that: A liquid supply channel (52) is provided in the energy absorbing block (51), the liquid supply channel (52) is connected between the second section (3) and the liquid supply pipe (54), and the liquid supply pipe (54) can flow the fracturing fluid into the liquid supply channel (52); and / or, The shock absorbing mechanism (53) comprises a connecting member (531), a shock absorber (532) and a fitting head (533); the connecting member (531) is connected to the energy absorbing block (51); the fitting head (533) abuts against the lane wall (8); and the shock absorber (532) is connected between the connecting member (531) and the fitting head (533).

8. The anti-recoil drilling vehicle according to claim 7, characterized in that: The shock absorber (532) includes: A shock-absorbing shell (5321), wherein one end of the shock-absorbing shell (5321) is open, and an end away from the opening is connected to the connecting member (531); a support rod (5322), one end of the support rod (5322) extending into the opening of the shock-absorbing shell (5321), and dividing the shock-absorbing shell (5321) along the length direction into a first section (5321a) provided with the support rod (5322) and a second section (5321b) not provided with the support rod (5322); the other end of the support rod (5322) being connected to the fitting head (533); A first spring (5323), the first spring (5323) is arranged in the second section (5321b), one end of the first spring (5323) is connected to the inner wall of the shock-absorbing shell (5321) and is parallel to the support rod (5322), and when the shock-absorbing shell (5321) moves in a direction close to the fitting head (533), the first spring (5323) can be pressed against the support rod (5322) and the first spring (5323) can be compressed to reduce shock.

9. The anti-recoil drilling vehicle according to claim 8, characterized in that: The shock absorber (532) also includes a second spring (5324) and a pressure plate (5325), wherein the second spring (5324) is sleeved on the outside of the support rod (5322), and the pressure plate (5325) is connected to the inner wall of the first section (5321a), and the pressure plate (5325) is against the end of the second spring (5324) away from the fitting head (533), and can compress the second spring (5324) to reduce shock when the shock absorbing shell (5321) moves toward the fitting head (533).

10. The anti-recoil drilling vehicle according to claim 9, characterized in that: A blocking piece (5326) is provided at one end of the support rod (5322) close to the first spring (5323), and when the shock-absorbing shell (5321) moves in a direction away from the fitting head (533), the blocking piece (5326) can be stopped by the pressure piece (5325) to prevent the shock-absorbing shell (5321) from falling off from the support rod (5322).

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