A variable diameter clamping and straightening system for horizontal large diameter pipe rescue drilling rig

Abstract

The invention discloses a variable diameter clamping and straightening system for a horizontal large-diameter pipe-following rescue drilling rig, which consists of a straightening device, a variable diameter mechanism, a clamping device and a remote straightening device. The central axis of the straightening device is concentric with the central axis of the drilling rig power head; the variable diameter mechanism is installed inside the straightening device, and the clamping device is symmetrically installed at the front end of the straightening device; the remote straightening device adjusts the distance with the drilling rig as required, straightens the drill tool in front of the drilling rig, and prevents the drilling tool from falling due to its own weight and causing the drilling hole to deviate; the device realizes the clamping and straightening functions of drilling tools of different calibers without the need to replace clamping and straightening devices of different specifications, and can also adjust the construction angle of the drilling rig in a small range according to the deviation of the drilling hole, correct the deviation, and extend the construction rescue length, so as to cooperate with the rescue drilling rig to achieve the purpose of increasing the rescue efficiency and success rate.

Description

Technical Field

[0001] The invention belongs to the technical field of safety equipment for mining or tunnel construction, and in particular relates to a variable diameter clamping and straightening system for a horizontal large-diameter pipe rescue drill. Background Art

[0002] Rescue drills are mainly used to quickly open rescue escape passages after mines and tunnels collapse. Some landslides will cause the passages to be completely buried, and people in the lanes or tunnels will be trapped between the landslide body and the face, threatening the lives of the trapped people. The existing rescue methods mainly include small pilot pit rescue method, jacking method, large-diameter rescue drill method, etc. Among them, the large-diameter rescue drill method is a more advanced mechanized rescue method. Through the drilling rig and special drilling tools, the trapped people can be quickly reached through the landslide body to rescue the trapped people. The geological conditions of the landslide body are complex, and the length of the landslide is unpredictable. There may be a risk that the escape passage cannot be opened at one time. In view of this, a multi-stage progressive pipe drilling method is proposed, in which the upper-level casing is used as the hole protection pipe for the next-level drilling to solve the problems of complex strata and large length of the landslide body. Therefore, during the rescue process, it is necessary to replace drilling tools of different diameters according to the on-site conditions for construction. However, the existing clamping and straightening system can only adapt to drilling tools of a single diameter, and it may take a long time to replace the clamping and straightening systems of different sizes on site, which cannot meet the 72-hour golden rescue time. At the same time, during the rescue construction process, according to the deviation of the drilling hole, the construction angle of the drilling rig is adjusted in a small range, which has a significant effect on correcting the deviation and extending the construction length. The existing large-diameter rescue drilling rig cannot adjust the construction angle, and can only indirectly adjust the hole angle by adjusting the height of the fuselage, which takes a lot of time on site. In order to ensure the stability of the drilling rig, this method cannot be used to adjust the construction angle during the construction process. Therefore, a clamping and straightening system with a variable diameter for the rescue drilling rig is invented, which has the function of adjusting the construction angle, which plays a vital role in increasing the rescue efficiency and success rate. Summary of the invention

[0003] In order to solve the technical problem that the existing large-diameter rescue drilling rig clamping and straightening system can only adapt to single-caliber drilling tools and cannot adjust the drilling construction angle, the purpose of the present invention is to provide a horizontal large-diameter pipe rescue drilling rig variable diameter clamping and straightening system.

[0004] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0005] A horizontal large-diameter pipe rescue drilling rig variable diameter clamping and straightening system, characterized in that it consists of a straightening device, a variable diameter mechanism, a clamping device and a distal straightening device;

[0006] The central axis of the straightening device is concentric with the central axis of the drilling rig power head; the reducing mechanism is installed inside the straightening device and is used for straightening drilling tools of different diameters; the central axis of the reducing mechanism coincides with the axis of the central through hole of the straightening device; the clamping device is symmetrically installed at the front end of the straightening device with the axis of the central through hole of the straightening device as the axis of symmetry; the clamping devices are arranged in pairs and fixed to the straightening device through the clamping device base, and are used for clamping drilling tools of different diameters and specifications, and assisting the power head to complete the loading and unloading of drilling tools; the remote straightening device adjusts the distance from the drilling rig as needed, straightens the drilling tools in front of the drilling rig, and prevents the drilling tools from falling due to their own weight and causing the drilling holes to deviate;

[0007] The straightening device comprises a housing, a loading and unloading plate, a connecting plate, and a base, wherein the connecting plate is mounted on the housing, the loading and unloading plate is connected to the housing through the connecting plate, and the housing is mounted on the guide rail surface of the drilling rig through the base;

[0008] The diameter-changing mechanism includes a sliding unit, a diameter-changing bracket, a limiting device, and a first telescopic mechanism, wherein:

[0009] The main structure of the variable diameter bracket is a circular ring, and is arranged in pairs. There is a protruding L-shape at each symmetrical position at both ends of the circular ring, and the directions are opposite. The sliding units are evenly distributed around the central axis of the variable diameter bracket, and the number is 6. One end of the first telescopic mechanism is connected to the end of the L-shape of the variable diameter bracket, and the other end is fixed to the straightening device, and the number is 2;

[0010] The clamping device comprises slips, a slip seat, a second telescopic mechanism, a clamping device base, and a guide rod;

[0011] The remote end straightening device comprises a stinger, a roller, a third telescopic mechanism and a supporting base.

[0012] According to the present invention, the limiting device comprises a limiting wheel, a bearing, and a third connecting rod, wherein:

[0013] The limiting wheels are arranged in pairs, and grooves are arranged on the surfaces of the limiting wheels. The variable diameter bracket can be embedded in the grooves and rotated. The third connecting rod is inserted on the limiting wheels through bearings, and both ends of the third connecting rod are installed on the straightening device.

[0014] Specifically, the sliding unit includes a sliding bracket, a universal ball, a first connecting rod, and a second connecting rod, wherein:

[0015] One end of the sliding bracket is connected to the universal ball, and the other end is fixed to the straightening device through a first connecting rod; the fixing points of the first connecting rod are evenly distributed around the axis of the central through hole of the straightening device, and a long hole is opened on the sliding bracket. The second connecting rod passes through the long hole and is fixed on the reducing bracket at both ends. The fixing points of the second connecting rod are evenly distributed around the central axis of the reducing bracket.

[0016] Specifically, when the first telescopic mechanism is extended, the diameter-reducing bracket is pulled to rotate counterclockwise, driving the second connecting rod to slide along the long hole on the sliding bracket, so that the sliding bracket rotates clockwise around the first connecting rod to a suitable position, so that the drilling tool can pass through the center;

[0017] When the first telescopic mechanism is retracted, it pulls the reducer bracket to rotate clockwise, driving the second connecting rod to slide along the long hole on the sliding bracket, so that the sliding bracket rotates counterclockwise around the first connecting rod until the universal ball contacts the drill bit, so that the drill bit is uniformly stressed in the radial direction to play a straightening role.

[0018] Specifically, the slip is installed on the slip seat, the slip seat is connected to the second telescopic mechanism, and the mounting flange of the second telescopic mechanism is fixed on the base of the clamping device; one end of the guide rod is fixed on the slip seat, and the guide rods are arranged in pairs and symmetrically inserted at both ends of the mounting flange of the second telescopic mechanism to keep the balance of the second telescopic mechanism when it is telescoped, and the second telescopic mechanism extends to the drilling tool to clamp the drilling tool.

[0019] Specifically, the interior of the stinger is V-shaped, and rollers are installed in pairs on both sides of the V. The four legs of the stinger are inserted into the four corners of the supporting base. One end of the third telescopic mechanism is connected to the stinger, and the other end is connected to the supporting base. The third telescopic mechanism extends to the rollers and contacts the drilling tool, providing support force for the drilling tool and playing a straightening role.

[0020] Furthermore, the internal V-shape of the stinger rack can be inverted above the stinger rack to form a rhombus, and the four internal sides of the rhombus are all equipped with rollers. The support base is connected to the drilling tool moving device to ensure the concentricity of the distal straightening device and the straightening device.

[0021] The first method of using the above-mentioned horizontal large-diameter pipe rescue drilling rig variable diameter clamping and straightening system is characterized by comprising the following steps:

[0022] Step 1: The second telescopic mechanism retracts to the limit position;

[0023] Step 2: The power head sends the first drilling tool into the central through hole of the straightening device, and the second telescopic mechanism extends to the slips to clamp the drilling tool;

[0024] Step 3: The first telescopic mechanism retracts, so that the universal ball of the sliding unit contacts the drill bit and provides a force to keep the drill bit balanced;

[0025] Step 4: Separate the power head from the drill bit and move back;

[0026] Step 5: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool with the first drilling tool, and the second telescopic mechanism retracts to the slip to loosen the drilling tool;

[0027] Step 6: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 5 to ensure that subsequent drill rods are constructed in sequence;

[0028] Step 7: The remote stabilizing device is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism is extended to make the roller contact with the drilling tool to provide support force for stabilizing the drilling tool;

[0029] Step 8: When the drilling construction reaches the equipment capacity limit or when drilling into extremely broken or easily collapsed strata, the second telescopic mechanism (15) retracts to the limit position;

[0030] Step 9: The power head sends the next-level drilling tool with a smaller diameter into the central through hole of the straightening device, and the second telescopic mechanism extends to the slips to clamp the drilling tool;

[0031] Step 10: Repeat steps 3 to 8 until the rescue hole is drilled to form an escape route.

[0032] The second method of using the above-mentioned horizontal large-diameter pipe rescue drilling rig variable diameter clamping and straightening system is characterized by comprising the following steps:

[0033] Step 1: The second telescopic mechanism retracts to the limit position;

[0034] Step 2: The power head sends the first drilling tool into the central through hole of the straightening device, and the second telescopic mechanism extends to the slips to clamp the drilling tool;

[0035] Step 3: The first telescopic mechanism retracts, so that the universal ball of the sliding unit contacts the drill bit and provides a force to keep the drill bit balanced;

[0036] Step 4: Separate the power head from the drill bit and move back;

[0037] Step 5: The first telescopic mechanism extends, so that the universal ball of the sliding unit leaves the surface of the drill bit, and the drill bit forms a small downward drilling inclination angle under the action of gravity;

[0038] Step 6: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool with the first drilling tool, and the second telescopic mechanism retracts to the slip to loosen the drilling tool;

[0039] Step 7: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 6 to ensure that subsequent drilling rods are constructed in sequence;

[0040] Step 8: The remote straightening device is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism is retracted to make the drum leave the drilling tool. The drilling tool continues to tilt downward under the action of gravity to ensure and adjust the downward tilt angle of the drilling tool;

[0041] Step 9: Complete the rescue drilling construction according to the first method of use.

[0042] The third method of using the above-mentioned horizontal large-diameter pipe rescue drilling rig variable diameter clamping and straightening system is characterized by comprising the following steps:

[0043] Step 1: Remove the three sliding units located at the top of the reducer;

[0044] Step 2: The second telescopic mechanism retracts to the limit position;

[0045] Step 3: The power head sends the first drilling tool into the central through hole of the straightening device, and the second telescopic mechanism extends to the slips to clamp the drilling tool;

[0046] Step 4: The first telescopic mechanism retracts, so that the universal ball of the sliding unit contacts the drilling tool and provides a force to keep the drilling tool balanced;

[0047] Step 5: Separate the power head from the drill bit and move back;

[0048] Step 6: The first telescopic mechanism continues to retract, so that the universal ball of the sliding unit lifts the drilling tool to form a small upward drilling angle.

[0049] Step 7: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool with the first drilling tool, and the second telescopic mechanism retracts to the slip to loosen the drilling tool;

[0050] Step 8: Clamp, connect and loosen the drilling tools in the same way as steps 3, 5 and 7 to ensure the subsequent drilling rods are constructed in sequence;

[0051] Step 9: The remote straightening device is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism is extended to make the roller contact with the drilling tool, providing an upward lifting force for the drilling tool to ensure and adjust the upward angle of the drilling tool;

[0052] Step 10: Complete the rescue drilling construction according to the first method of use.

[0053] Compared with the prior art, the variable diameter clamping and straightening system of the horizontal large-diameter pipe rescue drill rig of the present invention has the beneficial technical effect of realizing the clamping and straightening functions of drill tools of different calibers without the need to replace clamping and straightening devices of different specifications. At the same time, the construction angle of the drill rig can be adjusted in a small range according to the deviation of the drilling hole, the deviation can be corrected, and the construction rescue length can be extended, thereby cooperating with the rescue drill rig to achieve the purpose of increasing the rescue efficiency and success rate.

[0054] Figures

[0055] Figure 1 It is a system structure diagram of the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig of the present invention;

[0056] Figure 2 It is a structural schematic diagram of the righting device;

[0057] Figure 3 The structure diagram of the diameter reducing mechanism is shown in FIG.

[0058] Figure 4 The structure of the clamping device is shown in FIG.

[0059] Figure 5 is a first structural schematic diagram of the distal righting device;

[0060] Figure 6 is a second structural schematic diagram of the distal righting device;

[0061] Figure 7 The figure is a schematic diagram of the structure of the limit device;

[0062] Figure 8 It is a schematic diagram of the structure of the sliding unit;

[0063] Fig. 9 This is a schematic diagram of the installation of the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig on the drilling rig;

[0064] Fig.10 It is a schematic diagram of the first method of using the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig installed on the drilling rig;

[0065] Fig.11 This is a schematic diagram of the second method of using the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig installed on the drilling rig.

[0066] The marks in the figure respectively represent: 1. straightening device, 2. reducing mechanism, 3. clamping device, 4. far-end straightening device, 5. shell, 6. loading and unloading plate, 7. connecting plate, 8. base, 9. sliding unit, 10. reducing bracket, 11. limiting device, 12. first telescopic mechanism, 13. cava, 14. cava seat, 15. second telescopic mechanism, 16. clamping device base, 17. guide rod, 18. stinger frame, 19. roller, 20. third telescopic mechanism, 21. supporting base, 22. sliding bracket, 23. universal ball, 24. first connecting rod, 25. second connecting rod, 26. limiting wheel, 27. bearing, 28. third connecting rod.

[0067] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0068] See also Figure 1 This embodiment provides a variable diameter clamping and straightening system for a horizontal large-diameter pipe rescue drilling rig, including a straightening device 1, a variable diameter mechanism 2, a clamping device 3, and a distal straightening device 4.

[0069] like Figure 2 As shown, the straightening device 1 comprises a housing 5, a loading and unloading plate 6, a connecting plate 7 and a base 8. The connecting plate 7 is mounted on the housing 5, the loading and unloading plate 6 is connected to the housing through the connecting plate 7, and the housing 5 is mounted on the guide rail surface of the drilling rig through the base 8; the central axis of the assembled straightening device 1 is concentric with the central axis of the drilling rig power head.

[0070] like Figure 3 As shown, the diameter-changing mechanism 2 comprises a sliding unit 9, a diameter-changing bracket 10, a limiting device 11 and a first telescopic mechanism 12. The diameter-changing mechanism 2 is installed inside the straightening device 1 and is used for straightening drilling tools of different diameter specifications.

[0071] like Figure 4 As shown, the clamping device 3 includes a slip 13, a slip seat 14, a second telescopic mechanism 15, a clamping device base 16, and a guide rod 17. The clamping device 3 is arranged in pairs and is fixed to the straightening device 1 through the clamping device base 16, and is used to clamp drilling tools of different diameters and specifications, and assist the power head to complete the loading and unloading of drilling tools.

[0072] like Figure 5 and Figure 6 As shown, the remote straightening device 4 includes a stinger 18, a roller 19, a third telescopic mechanism 20 and a support base 21. The remote straightening device 4 can adjust the distance from the drilling rig as needed, straighten the drilling tool in front of the drilling rig, and prevent the drilling tool from falling due to its own weight and causing the drilling hole to deviate.

[0073] In this embodiment, the clamping device 3 is symmetrically mounted at the front end of the straightening device 1 with the axis of the central through hole of the straightening device 1 as the symmetry axis. The central axis of the diameter reducing mechanism 2 coincides with the axis of the central through hole of the straightening device 1.

[0074] In this embodiment, the main structure of the diameter-changing bracket 10 is a circular ring, and there is a protruding L-shape at symmetrical positions at both ends of the circular ring in opposite directions. The diameter-changing bracket 10 is arranged in pairs.

[0075] The sliding units 9 are evenly distributed around the central axis of the variable diameter bracket 10, and the number is 6;

[0076] One end of the first telescopic mechanism 12 is connected to the end of the diameter-reducing bracket 10L, and the other end is fixed to the straightening device 1 . There are two of the first telescopic mechanisms 12 .

[0077] like Figure 7As shown, the limiting device 11 includes a limiting wheel 26, a bearing 27 and a third connecting rod 28. The limiting wheels 26 are arranged in pairs, wherein the limiting wheels 26 are provided with grooves on their surfaces, and the diameter-changing bracket 10 can be inserted into the grooves and rotated; the third connecting rod 28 is inserted on the limiting wheel 26 through the bearing 27, and both ends of the third connecting rod 28 are installed on the straightening device 1.

[0078] See also Figure 8 The sliding unit 9 includes a sliding bracket 22, a universal ball 23, a first connecting rod 24 and a second connecting rod 25. One end of the sliding bracket 22 is connected to the universal ball 23, and the other end is fixed to the straightening device 1 through the first connecting rod 24. The fixing points of the first connecting rod 24 are evenly distributed around the axis of the central through hole of the straightening device 1. A long hole is opened on the sliding bracket 22; so that the second connecting rod 25 passes through the long hole, and both ends are fixed to the reducing bracket 10. The fixing points of the second connecting rod 25 are evenly distributed around the central axis of the reducing bracket 10.

[0079] In this embodiment, when the first telescopic mechanism 12 is extended, the reducing bracket 10 is pulled to rotate counterclockwise, driving the second connecting rod 25 to slide along the long hole on the sliding bracket 22, so that the sliding bracket 22 rotates clockwise around the first connecting rod 24 to a suitable position so that the drilling tool can pass through the center.

[0080] When the first telescopic mechanism 12 is retracted, the reducer bracket 10 is pulled to rotate clockwise, driving the second connecting rod 25 to slide along the long hole on the sliding bracket 22, so that the sliding bracket 22 rotates counterclockwise around the first connecting rod 24 until the universal ball 23 contacts the drill bit, so that the drill bit is uniformly stressed in the radial direction to play a straightening role.

[0081] The slips 13 of the clamping device 3 are installed on the slip seat 14, the slip seat 14 is connected to the second telescopic mechanism 15, and the mounting flange of the second telescopic mechanism 15 is fixed on the base 16 of the clamping device; one end of the guide rod 17 is fixed to the slip seat 14), and the guide rod 17 is arranged in pairs and symmetrically inserted at both ends of the mounting flange of the second telescopic mechanism 15 to keep the balance when the second telescopic mechanism 15 is extended and retracted. When the second telescopic mechanism 15 is extended to the slip 13 to hold the drilling tool tightly, it clamps the drilling tool.

[0082] The interior of the stinger frame 18 of the distal straightening device 4 is V-shaped, and the rollers 19 are installed in pairs on both sides of the V-shape. The four legs of the stinger frame 18 are inserted into the four corners of the support base 21. One end of the third telescopic mechanism 20 is connected to the stinger frame 18, and the other end is connected to the support base 21. The third telescopic mechanism 20 extends to the roller 19 and contacts the drilling tool, providing support force for the drilling tool and playing a straightening role.

[0083] The internal V-shape of the stinger frame 18 of the distal straightening device 4 can also be inverted above the stinger frame to form a rhombus, and the four internal sides of the rhombus are all equipped with the roller 19. The support base 21 is connected to the drilling tool moving device to ensure the concentricity of the distal straightening device 4 and the straightening device 1.

[0084] like Figures 9 to 11 As shown, the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig provided in this embodiment has the following three methods during use:

[0085] The first method is as follows:

[0086] Step 1: The second telescopic mechanism 15 retracts to the limit position.

[0087] Step 2: The power head sends the first drilling tool into the central through hole of the straightening device 1, and the second telescopic mechanism 5) extends to the slip 13 to clamp the drilling tool.

[0088] Step 3: The first telescopic mechanism 12 retracts, so that the universal ball 23 contacts the drilling tool and provides a force to keep the drilling tool balanced.

[0089] Step 4: Separate the power head from the drill bit and move back.

[0090] Step 5: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool with the first drilling tool, and the second telescopic mechanism 15 contracts to the slip 13 to release the drilling tool.

[0091] Step 6: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 5 to ensure that subsequent drill rods are constructed continuously.

[0092] Step 7: The remote straightening device 4 is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism 20 is extended to make the roller 19 contact with the drilling tool to provide a straightening support force for the drilling tool.

[0093] Step 8: When the drilling construction reaches the equipment capacity limit or encounters extremely broken or easily collapsed strata, the second telescopic mechanism 15 retracts to the limit position.

[0094] Step 9: The power head delivers the next-level drilling tool with a smaller diameter into the central through hole of the straightening device 1, and the second telescopic mechanism 15 extends to the slips (13) to clamp the drilling tool.

[0095] Step 10: Repeat steps 3 to 8 until the rescue hole is drilled to form an escape route.

[0096] The second method is carried out as follows:

[0097] Step 1: The second telescopic mechanism 15 retracts to the limit position.

[0098] Step 2: The power head sends the first drilling tool into the central through hole of the straightening device 1, and the second telescopic mechanism 15 extends to the slips 13 to clamp the drilling tool.

[0099] Step 3: The first telescopic mechanism 12 retracts, so that the universal ball 23 contacts the drilling tool and provides a force to keep the drilling tool balanced.

[0100] Step 4: Separate the power head from the drill bit and move back.

[0101] Step 5: The first telescopic mechanism 12 is extended to make the universal ball 23 leave the surface of the drilling tool, and the drilling tool forms a small downward drilling inclination angle under the action of gravity.

[0102] Step 6: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool to the first drilling tool, and the second telescopic mechanism 15 contracts to the slip 13 to release the drilling tool.

[0103] Step 7: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 6 to ensure that subsequent drill rods are constructed continuously.

[0104] Step 8: The distal straightening device 4 is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism 20 is retracted to make the roller 19 leave the drilling tool. The drilling tool continues to tilt downward under the action of gravity to ensure and adjust the downward tilt angle of the drilling tool.

[0105] Step 9: Complete the rescue drilling construction according to the first method.

[0106] The third method is to proceed as follows:

[0107] The first step: removing the three sliding units 9 located at the top of the diameter-changing mechanism 2.

[0108] Step 2: The second telescopic mechanism 15 retracts to the limit position.

[0109] Step 3: The power head sends the first drilling tool into the central through hole of the straightening device 1, and the second telescopic mechanism 15 extends to the slips 13 to clamp the drilling tool.

[0110] Step 4: The first telescopic mechanism 12 retracts, causing the universal ball 23 to contact the drilling tool and provide a force to keep the drilling tool balanced.

[0111] Step 5: Separate the power head from the drill bit and move back.

[0112] Step 6: The first telescopic mechanism 12 continues to retract, so that the universal ball 23 lifts the drilling tool to form a slight upward drilling angle.

[0113] Step 7: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool to the first drilling tool, and the second telescopic mechanism 15 contracts to the slip 13 to release the drilling tool.

[0114] Step 8: Clamp, connect and loosen the drilling tools in the same way as in steps 3, 5 and 7 to ensure that subsequent drill rods are constructed continuously.

[0115] Step 9: The remote straightening device 4 is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism 20 is extended to make the roller 19 contact with the drilling tool, providing an upward lifting force for the drilling tool to ensure and adjust the upward angle of the drilling tool.

[0116] Step 10: Complete the rescue drilling construction according to the first method.

[0117] In summary, the variable diameter clamping and straightening system for the horizontal large-diameter pipe rescue drill rig provided in this embodiment can realize the clamping and straightening functions of drill tools of different calibers without the need to replace clamping and straightening devices of different specifications. At the same time, the construction angle of the drill rig can be adjusted in a small range according to the deviation of the drilling hole, the deviation can be corrected, and the construction rescue length can be extended, thereby cooperating with the rescue drill rig to increase the rescue efficiency and success rate.

Claims

1. A variable diameter clamping and straightening system for a horizontal large diameter pipe rescue drilling rig, characterized in that: It consists of four parts: a straightening device (1), a diameter-changing mechanism (2), a clamping device (3) and a distal straightening device (4); The central axis of the straightening device (1) is concentric with the central axis of the drilling rig power head; the diameter reducing mechanism (2) is installed inside the straightening device (1) and is used for straightening drilling tools of different diameters; the central axis of the diameter reducing mechanism (2) coincides with the axis of the central through hole of the straightening device (1); the clamping device (3) is symmetrically installed at the front end of the straightening device (1) with the axis of the central through hole of the straightening device (1) as the axis of symmetry; the clamping devices (3) are arranged in pairs and are fixed to the straightening device (1) through the clamping device base (16) and are used for clamping drilling tools of different diameters and assisting the power head in loading and unloading drilling tools; the remote straightening device (4) adjusts the distance from the drilling rig as needed to straighten the drilling tools in front of the drilling rig to prevent the drilling tools from falling due to their own weight and causing the drilling holes to deviate; The straightening device (1) comprises a housing (5), a loading and unloading plate (6), a connecting plate (7), and a base (8), wherein the connecting plate (7) is mounted on the housing (5), the loading and unloading plate (6) is connected to the housing via the connecting plate (7), and the housing (5) is mounted on a drilling rig guide rail surface via the base (8); The variable diameter mechanism (2) comprises a sliding unit (9), a variable diameter bracket (10), a limiting device (11), and a first telescopic mechanism (12), wherein: the main structure of the variable diameter bracket (10) is a circular ring, and is arranged in pairs, and symmetrical positions at both ends of the circular ring each have a protruding L shape, and the directions are opposite; the sliding units (9) are evenly distributed around the central axis of the variable diameter bracket (10), and the number is 6; one end of the first telescopic mechanism (12) is connected to the end of the L shape of the variable diameter bracket (10), and the other end is fixed to the straightening device (1), and the number is 2; The limiting device (11) comprises a limiting wheel (26), a bearing (27), and a third connecting rod (28), wherein: the limiting wheels (26) are arranged in pairs, a groove is arranged on the surface of the limiting wheel (26), and the diameter-changing bracket (10) can be inserted into the groove for rotation, the third connecting rod (28) is inserted on the limiting wheel (26) through the bearing (27), and both ends of the third connecting rod (28) are installed on the straightening device (1); The sliding unit (9) comprises a sliding bracket (22), a universal ball (23), a first connecting rod (24), and a second connecting rod (25), wherein: one end of the sliding bracket (22) is connected to the universal ball (23), and the other end is fixed to the straightening device (1) through the first connecting rod (24); the fixing points of the first connecting rod (24) are evenly distributed around the central through hole axis of the straightening device (1); a long hole is opened on the sliding bracket (22), and the second connecting rod (25) passes through the long hole, and both ends are fixed to the variable diameter bracket (10); the fixing points of the second connecting rod (25) are evenly distributed around the central through hole axis of the variable diameter bracket (10); The clamping device (3) comprises a slip (13), a slip seat (14), a second telescopic mechanism (15), a clamping device base (16), and a guide rod (17); the slip (13) is mounted on the slip seat (14), the slip seat (14) is connected to the second telescopic mechanism (15), and a mounting flange of the second telescopic mechanism (15) is fixed on the clamping device base (16); one end of the guide rod (17) is fixed on the slip seat (14), the guide rod (17) is arranged in pairs, and is symmetrically inserted at both ends of the mounting flange of the second telescopic mechanism (15), so that the second telescopic mechanism (15) is kept balanced when it is extended and retracted, and the second telescopic mechanism (15) plays a clamping role on the drilling tool when it is extended and retracted until the slip (13) holds the drilling tool tightly; The remote straightening device (4) comprises a stinger (18), a roller (19), a third telescopic mechanism (20), and a support base (21); the interior of the stinger (18) is V-shaped, and the rollers (19) are arranged in pairs on both sides of the V-shape; the four legs of the stinger (18) are inserted into the four corners of the support base (21); one end of the third telescopic mechanism (20) is connected to the stinger (18), and the other end is connected to the support base (21); the third telescopic mechanism (20) extends to the roller (19) and contacts the drilling tool, thereby providing support force for the drilling tool and playing a straightening role.

2. The variable diameter clamping and straightening system for horizontal large diameter pipe rescue drilling rig according to claim 1 is characterized in that: When the first telescopic mechanism (12) is extended, the diameter-changing bracket (10) is pulled to rotate counterclockwise, driving the second connecting rod (25) to slide along the long hole on the sliding bracket (22), so that the sliding bracket (22) rotates clockwise around the first connecting rod (24) to a suitable position, so that the drilling tool can pass through the center; When the first telescopic mechanism (12) is retracted, it pulls the variable diameter bracket (10) to rotate clockwise, driving the second connecting rod (25) to slide along the long hole on the sliding bracket (22), so that the sliding bracket (22) rotates counterclockwise around the first connecting rod (24) until the universal ball (23) contacts the drilling tool, so that the drilling tool is uniformly stressed in the radial direction to play a straightening role.

3. The variable diameter clamping and straightening system for horizontal large diameter pipe rescue drilling rig according to claim 1 is characterized in that: The V-shape inside the stinger (18) can also be inverted above the stinger (18) to form a rhombus, and the four inner sides of the rhombus are all equipped with rollers (19). The support base (21) is connected to the drilling tool moving device to ensure the concentricity of the distal straightening device (4) and the straightening device (1).

4. A first method of using the variable diameter clamping and straightening system of a horizontal large diameter pipe rescue drilling rig according to any one of claims 1 to 3, characterized in that: The following steps are involved: The first step: the second telescopic mechanism (15) retracts to the limit position; Step 2: The power head sends the first drilling tool into the central through hole of the straightening device (1), and the second telescopic mechanism (15) extends to the slip (13) to clamp the drilling tool; Step 3: The first telescopic mechanism (12) is retracted, so that the universal ball (23) of the sliding unit (9) contacts the drilling tool and provides a force to keep the drilling tool balanced; Step 4: Separate the power head from the drill bit and move back; Step 5: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool to the first drilling tool, and the second telescopic mechanism (15) is retracted to the slip (13) to release the drilling tool; Step 6: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 5 to ensure that subsequent drilling rods are constructed in sequence; Step 7: The remote straightening device (4) is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism (20) is extended to make the roller (19) contact the drilling tool to provide a straightening support force for the drilling tool; Step 8: When the drilling construction reaches the equipment capacity limit or encounters extremely broken or easily collapsed strata, the second telescopic mechanism (15) retracts to the limit position; Step 9: The power head sends the next-level drilling tool with a smaller diameter into the central through hole of the straightening device (1), and the second telescopic mechanism (15) extends to the slip (13) to clamp the drilling tool; Step 10: Repeat steps 3 to 8 until the rescue hole is drilled to form an escape route.

5. A second method for using the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig according to any one of claims 1 to 3, characterized in that: The following steps are involved: The first step: the second telescopic mechanism (15) retracts to the limit position; Step 2: The power head sends the first drilling tool into the central through hole of the straightening device (1), and the second telescopic mechanism (15) extends to the slip (13) to clamp the drilling tool; Step 3: The first telescopic mechanism (12) is retracted, so that the universal ball (23) of the sliding unit (9) contacts the drilling tool and provides a force to keep the drilling tool balanced; Step 4: Separate the power head from the drill bit and move back; Step 5: The first telescopic mechanism (12) is extended, so that the universal ball (23) of the sliding unit (9) leaves the surface of the drilling tool, and the drilling tool forms a small downward drilling inclination angle under the action of gravity; Step 6: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool to the first drilling tool, and the second telescopic mechanism (15) is retracted to the slip (13) to release the drilling tool; Step 7: Clamp, connect and loosen the drilling tools in the same way as in steps 2, 4 and 6 to ensure that subsequent drilling rods are constructed in sequence; Step 8: The distal straightening device (4) is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism (20) is retracted to make the roller (19) leave the drilling tool, and the drilling tool continues to tilt downward under the action of gravity to ensure and adjust the downward tilt angle of the drilling tool; Step 9: Complete the construction of the rescue drilling according to the method of claim 4.

6. A third method of using the variable diameter clamping and straightening system of the horizontal large diameter pipe rescue drilling rig according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Remove the three sliding units (9) located at the top of the diameter-changing mechanism (2); Step 2: The second telescopic mechanism (15) retracts to the limit position; Step 3: The power head sends the first drilling tool into the central through hole of the straightening device (1), and the second telescopic mechanism (15) extends to the slip (13) to clamp the drilling tool; Step 4: The first telescopic mechanism (12) is retracted, so that the universal ball (23) of the sliding unit (9) contacts the drilling tool and provides a force to keep the drilling tool balanced; Step 5: Separate the power head from the drill bit and move back; Step 6: The first telescopic mechanism (12) continues to retract, so that the universal ball (23) of the sliding unit (9) lifts the drilling tool to form a slight upward drilling angle; Step 7: The drilling rig hoisting system hoists the second drilling tool to a suitable position, cooperates with the power head to connect the second drilling tool to the first drilling tool, and the second telescopic mechanism (15) is retracted to the slip (13) to release the drilling tool; Step 8: Clamp, connect and loosen the drilling tools in the same way as steps 3, 5 and 7 to ensure the subsequent drilling rods are constructed in sequence; Step 9: The remote straightening device (4) is placed at a suitable position in front of the drilling rig, and the third telescopic mechanism (20) is extended to make the roller (19) contact the drilling tool, thereby providing an upward lifting force for the drilling tool and ensuring and adjusting the upward elevation angle of the drilling tool; Step 10: Complete the construction of the rescue drilling according to the method of claim 4.

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