Hexagonal tooth drill rod quick connection and disconnection method of large-diameter shaft drill

Abstract

The application introduces a hexagonal tooth embedded drill rod quick connection and disconnection method of large-diameter shaft drilling machine. The positioning assembly is installed on the hexagonal tooth embedded drill rod and the mechanical hand and the clamp base. When the drill rod is connected, the mechanical hand or manual frequent adjustment of the plug-in angle and the observation of whether the plug-in angle is appropriate are no longer needed. The positioning of the lug positioning block can realize the alignment and insertion of the inner and outer hexagons of the lower drill rod and the to-be-connected drill rod. Through the cooperation of the plug-in block, the lock pin block and the fixed block, the inner teeth and the outer teeth of the drill rod can be directly positioned to the tooth staggered and tooth superimposed position of the tooth embedded joint, the to-be-connected drill rod is connected, locked or the to-be-disconnected drill rod is unlocked and disconnected, the difference of the rotation positioning precision of the tooth embedded drill rod caused by the difference of the personal operation habits can be significantly reduced, the manpower for frequent observation of the positioning condition can be saved, the drill rod connection and disconnection efficiency is improved, the safety of the operator is ensured and the construction efficiency of the drilling machine is improved.

Description

Technical Field

[0001] This invention relates to the technical field of drilling equipment operation methods, and in particular to a method for quick connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs. Background Technology

[0002] Large-diameter vertical shaft drilling rigs are widely used in coal mines, metal mines, offshore wind power, and other fields. They employ a power head to drive a drilling tool system, including drill pipes of different specifications, to continuously break rocks downwards to achieve the purpose of drilling. Hexagonal toothed drill pipes are one of the most commonly used types of drill pipes. When using hexagonal toothed drill pipes for drilling operations, after each drilling stroke, a length extension operation is required to continue drilling. This involves securing the drill string in place, disengaging the power head from the lower drill pipe, and using a robotic arm or other lifting equipment to connect a new drill pipe between the power head and the lower drill pipe before continuing drilling. Similarly, after all drilling operations are completed, the drill pipes, along with the drill bit and other drilling tools, must be retrieved from the well. At this point, the power head drives the lower drill pipe and a series of drilling tools to the chuck position via the main hydraulic cylinder, then disengages the power head from the lower drill pipe. The disengaged lower drill pipe is then removed using a robotic arm or other lifting equipment. This process is repeated until all drill pipes have been retrieved from the well.

[0003] Throughout the entire drilling process, from the start to the end, the time spent on adding and retrieving drill pipe is considerable. The fine-tuning operations during drill pipe alignment, insertion, and pin / locking processes are often dependent on operator experience and require repeated adjustments, impacting efficiency. During both addition and retrieval, the drill pipe alignment process requires continuous rotation of the jaw coupling for positioning. However, on large drilling rigs, the jaw coupling itself weighs hundreds of kilograms, and during drill pipe operation, mud and sand can enter the jaw coupling, increasing rotational resistance. The increased difficulty in alignment means that even with the assistance of a robotic arm, the jaw coupling cannot be rotated to the correct misalignment angle in one step. It still requires close cooperation and frequent adjustments from both the supervisor and operator to achieve the appropriate angle for aligning the drill rod to be connected with the lower drill rod, or removing the drill rod to be unloaded from the lower drill rod joint. The entire process is time-consuming, labor-intensive, and involves strict procedures and cumbersome operations, making it prone to errors. Furthermore, the process of connecting and unloading drill rods often requires operators to stand at the connection point to assist in the work and closely observe and adjust the situation. The longer the operator remains at this point, the more difficult it is to ensure safety, posing a certain degree of danger. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for quick connection and disconnection of hexagonal toothed drill pipes for large-diameter vertical shaft drilling rigs, making the connection and disconnection of drill pipes simple, convenient, fast, safe and reliable.

[0005] The technical solution adopted in this invention is:

[0006] A method for quick connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs, comprising the following steps:

[0007] S1: Install positioning components on the hexagonal toothed drill rod, the clamping base, and the robotic gripper head; the positioning components include a lug positioning block, a fixing block, a plug-in block, and a locking pin block; specifically:

[0008] a: A set of lug positioning blocks are symmetrically arranged on the outer edge of the hexagonal toothed drill rod near the inner hexagonal end, and the positions of the two lug positioning blocks correspond to the center positions of one of the pairs of opposite sides of the inner hexagonal drill rod; a fixing block is arranged on the outer edge of the central tube of the hexagonal toothed drill rod near the outer hexagonal end;

[0009] b: Set concave lugs on the clamping base and the robotic gripper head respectively, which are compatible with the lug positioning blocks on the hexagonal toothed drill rod; so that the drill rod being clamped or held is fixed at an angle according to the position of the lug positioning blocks;

[0010] c: Based on the number of teeth n inside the toothed insert and the position of the locking pin hole, insert blocks and locking pin blocks that cooperate with the fixed blocks are respectively set on the end face of the toothed insert. The insert blocks and locking pin blocks are located on both sides of the fixed block of the hexagonal toothed insert drill rod.

[0011] S2: Before connecting the drill pipe, the power head and drill bit are lifted by the main hydraulic cylinder, and the concave lug on the clamping base is aligned with the convex positioning block on the lower drill pipe connected to the short-connected drill pipe. The clamping base is used to fix the lower drill pipe.

[0012] S3: Remove the locking pin at the connection between the short drill rod and the lower drill rod connected to the power head. Rotate the toothed connector on the short drill rod until the insertion stop on the toothed connector contacts the fixed stop on the central tube. At this point, the inner teeth of the toothed connector and the outer teeth of the inner hexagonal end of the lower drill rod are in a misaligned position, i.e., the insertion and extraction position of the two drill rods. This will separate the short drill rod from the lower drill rod.

[0013] S4: After being disengaged, the short-connected drill rod, along with the power head, continues to rise under the drive of the main hydraulic cylinder, leaving enough height for the drill rod to be connected; the concave lug on the gripper head of the robotic arm cooperates with the convex lug positioning block on the drill rod to be connected, and the robotic arm grips the drill rod to be connected and sends it to the connection position between the short-connected drill rod and the lower drill rod. The robotic arm rotates until the concave lug on the gripper head corresponds vertically to the concave lug on the outer side of the clamping base of the lower drill rod, so that the outer hexagon of the drill rod to be connected is aligned with the inner hexagon of the lower drill rod.

[0014] S5: Rotate the jaw coupling of the drill rod to be connected until the insertion stop on the jaw coupling contacts the fixed stop on the central tube. At this point, the inner teeth of the jaw coupling and the outer teeth of the inner hexagonal end of the lower drill rod are in a misaligned position, which is the insertion and extraction position of the two drill rods. The robot arm moves downward and inserts the outer hexagonal end of the drill rod to be connected into the inner hexagonal end of the lower drill rod. The inner teeth of the jaw coupling pass through the tooth gap of the drill rod to be connected and are located below the tooth ring of the drill rod to be connected.

[0015] S6: After the drill rod to be connected is inserted into the lower drill rod to the specified depth, rotate the toothed joint of the drill rod to make the locking pin block contact the fixed block. At this time, the inner teeth of the toothed joint of the drill rod to be connected and the outer teeth of the inner hexagonal end of the lower drill rod are in the tooth overlap position, that is, the locking position of the two drill rods; insert the locking pin from the locking pin hole on the toothed joint of the drill rod to the tooth gap until it is between the tooth gaps of the outer teeth of the inner hexagonal end of the lower drill rod, and connect the drill rod to the lower drill rod.

[0016] S7: The short-connect drill pipe descends under the drive of the main hydraulic cylinder, so that the outer hexagon of the short-connect drill pipe is inserted into the inner hexagon of the drill pipe to be connected to the specified depth. The short-connect drill pipe toothed joint is rotated so that the locking pin stop of the short-connect drill pipe toothed joint coincides with the fixed stop on the center tube of the short-connect drill pipe. At this time, the inner teeth of the short-connect drill pipe toothed joint coincide with the outer teeth of the outer hexagon of the drill pipe to be connected, and the locking pin is inserted; thus completing one drill pipe connection cycle.

[0017] S8: When disassembling the drill pipe, the power head and drill bit are lifted by the main hydraulic cylinder. The lug positioning block of the lower drill pipe to be disassembled is fixed by the clamp base. First, rotate the toothed joint of the drill pipe to be disassembled to separate the drill pipe to be disassembled from the lower drill pipe. Then, rotate the toothed joint of the short section drill pipe to separate the drill pipe to be disassembled from the short section drill pipe and connect the short section drill pipe to the lower drill pipe.

[0018] Specifically, both the insertion stop and the locking pin stop are perpendicular to the end face of the dental insert. The locking pin stop, with one of its locking pin holes as a reference, has an angle α between the side of the locking pin stop that mates with the fixed stop and the plane containing the center of the locking pin hole. An odd multiple of; the included angle β between the inner surfaces of the insert stop and the locking pin stop is An odd multiple of.

[0019] More specifically, the outer ends of the plug-in block and the locking pin block are provided with notched steps that cooperate with the fixed block, and the outer sides are provided with reinforcing ribs.

[0020] Due to the adoption of the technical solution described above, the present invention has the following advantages:

[0021] This invention adds positioning components to the hexagonal jaw-clamp drill rod, as well as the robotic arm and clamping base. When adding drill rods, it eliminates the need for frequent adjustments to the alignment and insertion angles by the robotic arm or by manual observation. The positioning of the lug positioning block enables the alignment and insertion of the drill rod to be added with the inner and outer hexagonal parts of the lower drill rod. Furthermore, through the cooperation of the insertion stop block, locking pin stop block, and fixing stop block, the misalignment and overlap positions of the inner teeth of the jaw-clamp connector and the outer teeth of the drill rod can be directly located, enabling the insertion and locking of the drill rod to be added or the unlocking and removal of the drill rod to be removed. This significantly reduces the differences in rotational positioning accuracy of the jaw-clamp drill rod due to individual operating habits, saves manpower from frequent observation of positioning, improves drill rod connection and removal efficiency, ensures operator safety, and increases the construction efficiency of the drilling rig. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the alignment of the drill rod to be connected and the lower drill rod being clamped according to the present invention.

[0023] Figure 2 This is a partial schematic diagram of the tooth insert connector at the outer hexagonal end of the hexagonal tooth insert drill rod of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of the dental fitting of the present invention.

[0025] Figure 4 This is a schematic diagram showing the positions of the insertion stop and locking pin stop of the 12-tooth toothed connector of the present invention on the end face of the toothed connector.

[0026] Figure 5 This is a schematic diagram of the robotic arm of the present invention.

[0027] In the diagram: 1-Drill rod to be connected, 2-Lower drill rod, 3-Clamping base, 4-Robot arm, 5-Toothed connector, 51-Locking pin hole, 6-Center tube, 7-Protruding lug positioning block, 8-Concave lug seat, 9-Fixing block, 10-Plug-in block, 11-Locking pin block, 12-Locking pin. Detailed Implementation

[0028] The present invention will be further explained and described below with reference to the accompanying drawings and embodiments. However, this should not be construed as limiting the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0029] Combined with appendix Figure 1-5 The method for quick connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs, taking a 12-tooth toothed drill pipe as an example, includes the following specific steps:

[0030] S1: A positioning component is installed on the hexagonal toothed drill rod, the clamping base 3, and the gripper head of the robotic arm 4; the positioning component includes a lug positioning block 7, a fixing block 9, an insertion block 10, and a locking pin block 11; specifically:

[0031] a: A set of lug positioning blocks 7 are symmetrically arranged on the outer edge of the hexagonal tooth insert drill rod near the inner hexagonal end. The positions of the two lug positioning blocks 7 correspond to the center positions of one set of opposite sides of the inner hexagonal drill rod. A fixing block 9 is arranged on the outer edge of the central tube 6 near the outer hexagonal end of the hexagonal tooth insert drill rod.

[0032] b: Set concave lugs 8 on the clamping heads of the clamping base 3 and the robotic arm 4 respectively, which are in conjunction with the lug positioning blocks 7 on the hexagonal toothed drill rod; so that the clamped or held drill rod is fixed at an angle according to the position of the lug positioning blocks 7.

[0033] c: Based on the number of teeth n=12 in the toothed connector 5 and the position of the locking pin hole 51, a plug-in block 10 and a locking pin block 11 that cooperate with the fixed block 9 are respectively vertically set on the end face of the toothed connector 5. The plug-in block 10 and the locking pin block 11 are located on both sides of the fixed block 9 of the hexagonal toothed drill rod. The locking pin block 11 is based on one of the locking pin holes 51. The angle α between the side of the locking pin block 11 that cooperates with the fixed block 9 and the plane where the center of the locking pin hole 51 is located is 45°. The angle β between the inner sides of the plug-in block 10 and the locking pin block 11 is 45°. The outer ends of the plug-in block 10 and the locking pin block 11 are provided with a notched step that cooperates with the fixed block 9, and the outer sides are provided with reinforcing ribs.

[0034] S2: Before connecting the drill pipe, the power head and the drill bit are lifted by the main hydraulic cylinder, and the concave lug 8 on the clamping base 3 is aligned with the convex lug positioning block 7 on the lower drill pipe 2 connected to the short-connected drill pipe. The clamping base 3 is used to fix the lower drill pipe 2.

[0035] S3: Remove the locking pin 12 at the connection between the short drill rod connected to the power head and the lower drill rod 2. Rotate the toothed connector 5 on the short drill rod until the insertion stop 10 on the toothed connector 5 contacts the fixed stop 9 on the central tube 6. At this point, the internal teeth of the toothed connector 5 and the external teeth of the hexagonal end of the lower drill rod 2 are in a misaligned position, i.e., the insertion and extraction position of the two drill rods, thus separating the short drill rod from the lower drill rod 2.

[0036] S4: After being disengaged, the short-connected drill rod, along with the power head, continues to rise under the drive of the main hydraulic cylinder, leaving enough space for the drill rod 1 to be connected; the concave lug 8 on the gripper head of the robotic arm 4 cooperates with the convex lug positioning block 7 on the drill rod 1 to be connected, and the robotic arm 4 grips the drill rod 1 to be connected and sends it to the connection position between the short-connected drill rod and the lower drill rod 2. The robotic arm 4 rotates until the concave lug 8 on the gripper head corresponds vertically to the concave lug 8 on the outer side of the clamping base 3 of the lower drill rod 2, so that the outer hexagon of the drill rod 1 to be connected is aligned with the inner hexagon of the lower drill rod 2.

[0037] S5: Rotate the toothed connector 5 of the drill rod 1 to be connected. When the insertion stop 10 on the toothed connector 5 contacts the fixed stop 9 on the central tube 6, the inner teeth of the toothed connector 5 and the outer teeth of the inner hexagonal end of the lower drill rod 2 are in a position of tooth misalignment, that is, the insertion and extraction position of the two drill rods. The robot arm 4 moves downward and inserts the outer hexagonal end of the drill rod 1 to be connected into the inner hexagonal end of the lower drill rod 2. The inner teeth of the toothed connector 5 pass through the tooth gap of the drill rod 1 to be connected and are located below the tooth ring of the drill rod 1 to be connected.

[0038] S6: After the drill rod 1 to be connected is inserted into the lower drill rod 2 to a specified depth, rotate the toothed joint 5 of the drill rod 1 to make the locking pin stop 11 contact the fixed stop 9. At this time, the inner teeth of the toothed joint 5 of the drill rod 1 and the outer teeth of the inner hexagonal end of the lower drill rod 2 are in the tooth overlap position, that is, the locking position of the two drill rods; insert the locking pin 12 from the locking pin hole 51 on the toothed joint 5 of the drill rod 1 into the tooth gap until it is between the tooth gap of the outer teeth of the inner hexagonal end of the lower drill rod 2, and connect the drill rod 1 to the lower drill rod 2.

[0039] S7: The short-connect drill pipe descends under the drive of the main hydraulic cylinder, so that the outer hexagon of the short-connect drill pipe is inserted into the inner hexagon of the drill pipe to be connected 1 to the specified depth. The short-connect drill pipe toothed joint 5 is rotated so that the locking pin stop 11 of the short-connect drill pipe toothed joint 5 coincides with the fixed stop 9 on the center tube 6 of the short-connect drill pipe. At this time, the inner teeth of the short-connect drill pipe toothed joint 5 coincide with the outer teeth of the outer hexagon of the drill pipe to be connected 1. The locking pin 12 is inserted to complete one drill pipe connection cycle.

[0040] S8: When disassembling the drill pipe, the power head and the drill string are lifted by the main hydraulic cylinder. The lug positioning block 7 of the lower drill pipe to be disassembled is fixed by the clamping base 3. First, rotate the toothed joint 5 of the drill pipe to be disassembled to separate the drill pipe to be disassembled from the lower drill pipe. Then, rotate the toothed joint 5 of the short section drill pipe to separate the drill pipe to be disassembled from the short section drill pipe. Finally, connect the short section drill pipe of the power head to the lower drill pipe.

[0041] The parts of this invention not described in detail are prior art.

[0042] The embodiments selected herein for the purpose of disclosing the inventive objectives are currently considered suitable; however, it should be understood that the invention is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and invention.

Claims

1. A method for rapid connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs, characterized in that: The specific steps are as follows: S1: Install positioning components on the hexagonal toothed drill rod, the clamping base, and the robotic gripper head; the positioning components include a lug positioning block, a fixing block, a plug-in block, and a locking pin block; specifically: a: A set of lug positioning blocks are symmetrically arranged on the outer edge of the hexagonal toothed drill rod near the inner hexagonal end, and the positions of the two lug positioning blocks correspond to the center positions of one of the pairs of opposite sides of the inner hexagonal drill rod; a fixing block is arranged on the outer edge of the central tube of the hexagonal toothed drill rod near the outer hexagonal end; b: Set concave lugs on the clamping base and the robotic gripper head respectively, which are compatible with the lug positioning blocks on the hexagonal toothed drill rod; so that the drill rod being clamped or held is fixed at an angle according to the position of the lug positioning blocks; c: Based on the number of teeth n inside the toothed insert and the position of the locking pin hole, insert blocks and locking pin blocks that cooperate with the fixed blocks are respectively set on the end face of the toothed insert. The insert blocks and locking pin blocks are located on both sides of the fixed block of the hexagonal toothed insert drill rod. S2: Before connecting the drill pipe, the power head and drill bit are lifted by the main hydraulic cylinder, and the concave lug on the clamping base is aligned with the convex positioning block on the lower drill pipe connected to the short-connected drill pipe. The clamping base is used to fix the lower drill pipe. S3: Remove the locking pin at the connection between the short drill rod and the lower drill rod connected to the power head. Rotate the toothed connector on the short drill rod until the insertion stop on the toothed connector contacts the fixed stop on the central tube. At this point, the inner teeth of the toothed connector and the outer teeth of the inner hexagonal end of the lower drill rod are in a misaligned position, i.e., the insertion and extraction position of the two drill rods. This will separate the short drill rod from the lower drill rod. S4: After being disengaged, the short-connected drill rod, along with the power head, continues to rise under the drive of the main hydraulic cylinder, leaving enough height for the drill rod to be connected; the concave lug on the gripper head of the robotic arm cooperates with the convex lug positioning block on the drill rod to be connected, and the robotic arm grips the drill rod to be connected and sends it to the connection position between the short-connected drill rod and the lower drill rod. The robotic arm rotates until the concave lug on the gripper head corresponds vertically to the concave lug on the outer side of the clamping base of the lower drill rod, so that the outer hexagon of the drill rod to be connected is aligned with the inner hexagon of the lower drill rod. S5: Rotate the jaw coupling of the drill rod to be connected until the insertion stop on the jaw coupling contacts the fixed stop on the central tube. At this point, the inner teeth of the jaw coupling and the outer teeth of the inner hexagonal end of the lower drill rod are in a misaligned position, which is the insertion and extraction position of the two drill rods. The robot arm moves downward and inserts the outer hexagonal end of the drill rod to be connected into the inner hexagonal end of the lower drill rod. The inner teeth of the jaw coupling pass through the tooth gap of the drill rod to be connected and are located below the tooth ring of the drill rod to be connected. S6: After the drill rod to be connected is inserted into the lower drill rod to the specified depth, rotate the toothed joint of the drill rod to make the locking pin block contact the fixed block. At this time, the inner teeth of the toothed joint of the drill rod to be connected and the outer teeth of the inner hexagonal end of the lower drill rod are in the tooth overlap position, that is, the locking position of the two drill rods; insert the locking pin from the locking pin hole on the toothed joint of the drill rod to the tooth gap until it is between the tooth gaps of the outer teeth of the inner hexagonal end of the lower drill rod, and connect the drill rod to the lower drill rod. S7: The short-connect drill pipe descends under the drive of the main hydraulic cylinder, so that the outer hexagon of the short-connect drill pipe is inserted into the inner hexagon of the drill pipe to be connected to the specified depth. The short-connect drill pipe toothed joint is rotated so that the locking pin stop of the short-connect drill pipe toothed joint coincides with the fixed stop on the center tube of the short-connect drill pipe. At this time, the inner teeth of the short-connect drill pipe toothed joint coincide with the outer teeth of the outer hexagon of the drill pipe to be connected. The locking pin is inserted to complete one drill pipe connection cycle. S8: When disassembling the drill pipe, the power head and drill bit are lifted by the main hydraulic cylinder. The lug positioning block of the lower drill pipe to be disassembled is fixed by the clamp base. First, rotate the toothed joint of the drill pipe to be disassembled to separate the drill pipe to be disassembled from the lower drill pipe. Then, rotate the toothed joint of the short-connecting drill pipe to separate the drill pipe to be disassembled from the short-connecting drill pipe and connect the short-connecting drill pipe to the lower drill pipe.

2. The method for rapid connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs according to claim 1, characterized in that: Both the insertion stop and the locking pin stop are perpendicular to the end face of the dental insert. The locking pin stop is referenced to one of its locking pin holes, and the angle α between the side of the locking pin stop that mates with the fixed stop and the plane containing the center of the locking pin hole is [value missing]. An odd multiple of; the included angle β between the inner surfaces of the insert stop and the locking pin stop is An odd multiple of.

3. The method for rapid connection and disconnection of hexagonal toothed drill pipe for large-diameter vertical shaft drilling rigs according to claim 2, characterized in that: Both the insertion block and the locking pin block have a notched step at their outer ends that matches the fixed block, and both have reinforcing ribs on their outer sides.

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