Mortise type drill rod auxiliary dismounting device and mortise type drill rod dismounting method

Abstract

The application provides a toothed drill rod auxiliary dismounting device and a toothed drill rod dismounting method. The toothed drill rod auxiliary dismounting device comprises a clamping plate, a toothed nest rotating device and a toothed nest jacking device. The clamping plate comprises a first clamping plate and a second clamping plate. The first clamping plate is movably arranged relative to the second clamping plate. The first clamping plate has a clamping position close to the second clamping plate and clamping the upper end of the drill rod segment and an avoiding position away from the second clamping plate and avoiding the upper end of the drill rod segment. The toothed nest rotating device is arranged on the clamping plate. The toothed nest rotating device drives the toothed nest to rotate, so that the inner tooth of the toothed nest is staggered with the outer tooth of the drill rod segment. The toothed nest jacking device is movably arranged on the clamping plate. The toothed nest jacking device drives the toothed nest to rise. The technical scheme of the application effectively solves the problems of the related art, i.e., the connection and dismounting of the to-be-mounted drill rod and the drill rod segment of the toothed drill rod are difficult to operate, and the operation efficiency is low.

Description

Tooth-clutch drill pipe auxiliary disassembly equipment and tooth-clutch drill pipe disassembly method Technical Field

[0001] This invention relates to the field of toothed drill pipe disassembly technology, and more specifically, to a toothed drill pipe auxiliary disassembly device and a toothed drill pipe disassembly method. Background Technology

[0002] In the field of vertical shaft construction, drilling with vertical shaft drilling rigs is a construction method characterized by high overall efficiency, low safety risk, good well quality, and wide applicability. Drill pipe consists of the drill pipe to be installed and drill pipe sections. As the drilling depth increases, the drill pipe to be installed needs to be divided into drill pipe sections to adjust the overall length of the drill pipe to match the drilling depth.

[0003] Figure 1 shows a toothed drill pipe in the related technology. The toothed drill pipe 60 includes a drill pipe to be installed 65, a drill pipe segment 61, and a toothed nest 62. The drill pipe to be installed 65 is connected to a vertical shaft drilling rig. The drill pipe segment 61 is used to install below the drill pipe to be installed 65. The toothed nest 62 is used to connect the drill pipe to be installed 65 and the drill pipe segment 61. An outer toothed insert 611 is provided on the outer side of the upper end of the drill pipe segment 61. The toothed nest 62 is rotatably fitted onto the lower end of the drill pipe to be installed 62 and extends downward. The inner wall of the toothed nest 62 is provided with an inner toothed insert 621 that matches the outer toothed insert 611 of the drill pipe segment 61.

[0004] When the drill rod 65 to be installed needs to be connected to the drill rod segment 61, the toothed nest 62 is moved upward along the axial direction of the drill rod 32 to make the top of the drill rod segment 61 contact the drill rod 65 to be installed. Then, the toothed nest 62 is moved downward along the axial direction of the drill rod 32 to make the toothed nest 62 fit on the outer side of the upper end of the drill rod segment 61. By rotating the toothed nest 62, the inner toothed insert 621 and the outer toothed insert 611 stop and engage, thereby locking the drill rod 65 to be installed and the drill rod segment 61 in the vertical direction to transmit the tension in the vertical direction.

[0005] When drill pipe section 61 needs to be removed from drill pipe 65, the operator needs to rotate the toothed insert 62 to misalign the inner toothed insert 621 with the outer toothed insert 611. The operator then uses a pry bar or lever to lift the toothed insert 62 upwards, allowing drill pipe section 61 to separate from drill pipe 65. Furthermore, as the diameter of the well increases, the diameter and weight of drill pipe 65 and drill pipe section 61 also increase, correspondingly increasing the operational difficulty, labor intensity, and safety hazards.

[0006] Thus, the connection and disassembly of the drill rod to be installed and the drill rod sections in the related technology are difficult and the operation efficiency is low. Summary of the Invention

[0007] The main objective of this invention is to provide a toothed drill pipe auxiliary disassembly device and a toothed drill pipe disassembly method to solve the problems of difficult operation and low work efficiency in the connection and disassembly of the drill pipe to be installed and the drill pipe segments in related technologies.

[0008] To achieve the above objectives, according to one aspect of the present invention, a toothed drill pipe auxiliary disassembly device is provided for disassembling drill pipe segments from drill pipes with toothed inserts. The toothed drill pipe auxiliary disassembly device includes: a clamping plate, including a first clamping plate and a second clamping plate, the first clamping plate being movably disposed relative to the second clamping plate, the first clamping plate having a clamping position close to the second clamping plate and clamping the upper end of the drill pipe segment, and a clearance position away from the second clamping plate and avoiding the upper end of the drill pipe segment; a toothed insert rotating device disposed on the clamping plate, the toothed insert rotating device driving the toothed insert to rotate so that the inner toothed insert of the toothed insert is misaligned with the outer toothed insert of the drill pipe segment; and a toothed insert lifting device movably disposed on the clamping plate, the toothed insert lifting device driving the toothed insert to rise.

[0009] Furthermore, the tooth-nesting rotating device includes: a base disposed on a clamping plate; a first telescopic member, the first end of which is rotatably connected to the base; a rope connecting seat connected to the second end of the first telescopic member; and a rope, the first end of which is connected to the rope connecting seat, and the second end of which is connected to the outer wall of the tooth nest.

[0010] Furthermore, the tooth-nesting lifting device includes: a base body, movably mounted on a clamping plate; a second telescopic member, the first end of which is connected to the base body, and the second telescopic member is telescopically mounted in the vertical direction; and a lifting part, connected to the second end of the second telescopic member, the upper end of which can abut against the lower end of the tooth nest.

[0011] Furthermore, the tooth-nesting rotation device also includes a ball joint unit disposed between the first end of the first telescopic member and the base; the base is provided with a ball head connection portion, and the ball joint unit includes a ball head receiving cavity disposed on the ball head connection portion and a ball head disposed on the first end of the first telescopic member, a portion of the ball head is inserted into the ball head receiving cavity and anti-disengagement engagement with the ball head receiving cavity, and the ball head can rotate within the ball head receiving cavity so that the first end of the first telescopic member can rotate relative to the base.

[0012] Furthermore, the ball joint connection includes a connecting plate disposed on the base and a cover plate detachably connected to the connecting plate. The connecting plate is provided with a receiving groove for accommodating part of the ball joint, and the cover plate is provided with an anti-detachment hole communicating with the receiving groove. The receiving groove and the anti-detachment hole form a ball joint receiving cavity. The cover plate includes a first cover plate and a second cover plate. Part of the anti-detachment hole is disposed on the first cover plate, and another part of the anti-detachment hole is disposed on the second cover plate. The diameter of the opening of the anti-detachment hole on the side away from the connecting plate is smaller than the diameter of the ball joint.

[0013] Furthermore, the ball joint connection includes a connecting plate mounted on the base and a cover plate detachably connected to the connecting plate. The connecting plate is provided with a receiving groove for accommodating a portion of the ball joint, and the cover plate is provided with an anti-detachment hole communicating with the receiving groove. The receiving groove and the anti-detachment hole form a ball joint receiving cavity. The opening of the receiving groove is circular, and the diameter of the opening is greater than or equal to the diameter of the ball joint. The depth of the receiving groove is greater than or equal to the radius of the ball joint. The diameter of the anti-detachment hole gradually decreases in the direction from near the cover plate to far away from the cover plate. The maximum diameter of the anti-detachment hole is greater than or equal to the diameter of the ball joint, and the minimum diameter of the anti-detachment hole is less than the diameter of the ball joint.

[0014] Furthermore, the tooth-nesting lifting device also includes a guide rod disposed on the base and a slider slidably sleeved on the guide rod. The guide rod extends in the vertical direction, and the slider is disposed between the second end of the lifting part and the second telescopic member.

[0015] Furthermore, the guide rod is arranged parallel to the second telescopic component, which includes a telescopic cylinder and a telescopic rod. The lower end of the telescopic cylinder is rotatably hinged to the base via a first pin. The base is provided with a hinge lug for hinged to the lower end of the telescopic cylinder. The upper end of the telescopic rod is hinged to the slider via a second pin. The first pin and the second pin are arranged parallel to each other.

[0016] Furthermore, the lifting part is a lifting plate, which is located on one side of the base and extends horizontally. A clearance groove is provided on the side wall of the end of the lifting plate away from the second telescopic member. The clearance groove runs through the upper and lower surfaces of the lifting plate. When the upper surface of the lifting plate abuts against the lower end of the toothed nest, the clearance groove can avoid the entry and exit of the external teeth of the drill rod segment into the toothed nest. The clearance groove is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases from the direction close to the second telescopic member to the direction away from the second telescopic member.

[0017] According to another aspect of the present invention, a method for disassembling a toothed drill pipe is provided, which is achieved by the aforementioned toothed drill pipe auxiliary disassembly device. The toothed drill pipe disassembly method includes the following steps: placing a first clamping plate in a clamping position and clamping the upper end of the drill pipe segment onto the clamping plate; connecting a first end of a rope to a rope connecting seat and a second end of a rope to the outer wall of the toothed nest; retracting the first telescopic member of the toothed nest rotating device to rotate the toothed nest; determining whether the inner toothed insert on the toothed nest and the outer toothed insert on the drill pipe segment are completely misaligned; removing the rope when the inner toothed insert on the toothed nest and the outer toothed insert on the drill pipe segment are completely misaligned; moving the toothed nest lifting device to the toothed nest so that the lifting part contacts the lower surface of the toothed nest; raising the lifting part to lift the toothed nest, thereby separating the toothed nest from the drill pipe segment.

[0018] Furthermore, the step of determining whether the inner toothed insert on the toothed nest and the outer toothed insert on the drill pipe segment are completely misaligned includes: contracting the first telescopic member with a preset force; determining whether the first telescopic member stops contracting; when the first telescopic member stops contracting, it is determined that the inner toothed insert on the toothed nest and the outer toothed insert on the drill pipe segment are completely misaligned.

[0019] Furthermore, the step of determining whether the inner toothed insert on the toothed nest and the outer toothed insert on the drill rod segment are completely misaligned includes: detecting the angle of rotation of the first telescopic member relative to the base; if the angle of rotation of the first telescopic member relative to the base reaches the set angle, it is determined that the inner toothed insert on the toothed nest and the outer toothed insert on the drill rod segment are completely misaligned.

[0020] According to the technical solution of this invention, a toothed drill pipe auxiliary disassembly device is used to disassemble drill pipe segments from a drill pipe to be installed with toothed nests. The toothed drill pipe auxiliary disassembly device includes: a clamping plate, a toothed nest rotation device, and a toothed nest lifting device. The clamping plate includes a first clamping plate and a second clamping plate. The first clamping plate is movably disposed relative to the second clamping plate. The first clamping plate has a clamping position close to the second clamping plate and clamping the upper end of the drill pipe segment, and a clearance position away from the second clamping plate and avoiding the upper end of the drill pipe segment. The arrangement of the first and second clamping plates facilitates the fixing of the drill pipe segments, thereby facilitating the disassembly operation of the drill pipe segments from the drill pipe to be installed. The toothed nest rotation device is disposed on the clamping plate and drives the toothed nest to rotate, so that the inner toothed part of the toothed nest is misaligned with the outer toothed part of the drill pipe segment. In this way, the drill rod to be installed, located above, is relatively stationary with respect to the drill rod segment fixed by the first and second clamping plates. The toothed nest rotation device drives the toothed nest to rotate, so that the inner tooth of the toothed nest is misaligned with the outer tooth of the drill rod segment, allowing the drill rod segment to separate from the drill rod to be installed. The toothed nest lifting device is movably mounted on the clamping plate, and drives the toothed nest to rise. After the inner tooth of the toothed nest is misaligned with the outer tooth of the drill rod segment, the toothed nest lifting device drives the toothed nest to rise, allowing the drill rod segment to be removed from the toothed nest, thus separating the drill rod to be installed and the drill rod segment. Therefore, the technical solution of this application effectively solves the problems of difficult operation and low work efficiency in the connection and disassembly of the drill rod to be installed and the drill rod segment in the related art. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 shows a cross-sectional schematic diagram of a toothed drill pipe in the background art;

[0023] Figure 2 shows a perspective structural schematic diagram of an embodiment of the tooth-clamp drill pipe auxiliary disassembly device according to the present invention;

[0024] Figure 3 shows a partial enlarged view of point A of the toothed drill pipe auxiliary disassembly device in Figure 2;

[0025] Figure 4 shows a three-dimensional structural diagram of the first clamping plate of the toothed drill pipe auxiliary disassembly device in Figure 2 when it is in the clamping position.

[0026] Figure 5 shows a three-dimensional structural diagram of the first clamping plate of the toothed drill pipe auxiliary disassembly device in Figure 2 when it is in the avoidance position.

[0027] Figure 6 shows a three-dimensional structural diagram of the toothed drill pipe auxiliary disassembly device of Figure 2 after separating the drill pipe to be installed from the drill pipe segments.

[0028] Figure 7 shows a three-dimensional structural schematic diagram of the tooth-nesting lifting device of the tooth-clamping drill pipe auxiliary disassembly equipment in Figure 2;

[0029] Figure 8 shows a side view of the tooth-nesting lifting device of the tooth-clamping drill pipe auxiliary disassembly device in Figure 2;

[0030] Figure 9 shows a three-dimensional structural schematic diagram of the tooth-nesting rotating device of the tooth-clamping drill pipe auxiliary disassembly device in Figure 2;

[0031] Figure 10 shows a side view of the tooth-nesting rotating device of the tooth-clamping drill pipe auxiliary disassembly device in Figure 2;

[0032] Figure 11 shows a top view of the tooth-nesting rotating device of the tooth-clamping drill pipe auxiliary disassembly device in Figure 2;

[0033] Figure 12 shows a partial cross-sectional schematic diagram of the tooth-nesting rotating device of the tooth-clamping drill pipe auxiliary disassembly device of Figure 2;

[0034] Figure 13 shows a front view of the tooth-nesting rotating device of the tooth-clamping drill pipe auxiliary disassembly device in Figure 2;

[0035] Figure 14 shows a flowchart of an embodiment of the tooth-clamp drill pipe disassembly method according to the present invention.

[0036] The above figures include the following reference numerals:

[0037] 60. Tooth-clamp drill pipe; 61. Drill pipe segment; 611. External tooth-clamp; 62. Tooth-clamped; 621. Internal tooth-clamp; 64. Wire rope loop; 65. Drill pipe ready for installation;

[0038] 100. Clamping plate; 101. First clamping plate; 102. Second clamping plate;

[0039] 1. Tooth-nesting lifting device;

[0040] 1-1, Base; 1-10, Base Plate; 1-11, Hinge; 1-20, Top Plate; 1-30, Guide Rod; 1-40, Slider; 1-42, Mounting Plate; 1-421, Through Hole; 1-43, Support Plate; 1-431, First Reinforcing Plate; 1-50, Second Telescopic Component; 1-51, Telescopic Cylinder; 1-511, First Pin; 1-52, Telescopic Rod; 1-521, Second Pin; 1-60, Lifting Part; 1-61, Clearance Groove; 1-70, Connecting Plate; 1-71, Slot; 1-80, Vertical Plate; 1-81, Second Reinforcing Plate;

[0041] 2. Tooth-nesting rotating device;

[0042] 2-10, Base; 2-11, Horizontal Plate; 2-111, Bolt Hole; 2-12, Vertical Plate; 2-13, Third Reinforcing Plate; 2-20, First Telescopic Component; 2-21, Cylinder Body; 2-22, Hydraulic Rod; 2-30, Rope Connector; 2-31, Base Body; 2-311, First Waist-Shaped Plate; 2-312, Second Waist-Shaped Plate; 2-313, Partition; 2-32, Third Pin; 2-33, Fourth Pin; 2-40, Rope; 2-50, Ball Joint Unit; 2-51, Connecting Plate; 2-511, Receiving Groove; 2-52, Ball Head; 2-521, Insertion Part; 2-531, Anti-Dislodgement Hole; 2-532, Gap; 2-54, Cover Plate; 2-541, First Cover Plate; 2-542, Second Cover Plate. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] As shown in Figures 1 to 6, the toothed drill pipe auxiliary disassembly device of this embodiment is used to disassemble the drill pipe segment 61 from the drill pipe 65 to be installed, which has a toothed nest 62. The toothed drill pipe auxiliary disassembly device includes: a clamping plate 100, a toothed nest rotating device 2, and a toothed nest lifting device 1. The clamping plate 100 includes a first clamping plate 101 and a second clamping plate 102. The first clamping plate 101 is movably disposed relative to the second clamping plate 102. The first clamping plate 101 has a clamping position close to the second clamping plate 102 and clamping the upper end of the drill pipe segment 61, and a clearance position away from the second clamping plate 102 and avoiding the upper end of the drill pipe segment 61. The toothed nest rotating device 2 is disposed on the clamping plate 100. The toothed nest rotating device 2 drives the toothed nest 62 to rotate so that the inner toothed 621 of the toothed nest 62 is misaligned with the outer toothed 611 of the drill pipe segment 61. The tooth nest lifting device 1 is movably mounted on the clamping plate 100, and the tooth nest lifting device 1 drives the tooth nest 62 to rise.

[0047] Using the technical solution of this embodiment, the toothed drill pipe auxiliary disassembly device is used to disassemble the drill pipe segment 61 from the drill pipe 65 to be installed, which has a toothed nest 62. The toothed drill pipe auxiliary disassembly device includes: a clamping plate 100, a toothed nest rotating device 2, and a toothed nest lifting device 1. The clamping plate 100 includes a first clamping plate 101 and a second clamping plate 102. The first clamping plate 101 is movably disposed relative to the second clamping plate 102. The first clamping plate 101 has a clamping position close to the second clamping plate 102 and clamping the upper end of the drill pipe segment 61, and a clearance position away from the second clamping plate 102 and avoiding the upper end of the drill pipe segment 61. The arrangement of the first clamping plate 101 and the second clamping plate 102 facilitates the fixing of the drill pipe segment 61, so as to facilitate the disassembly operation of the drill pipe segment 61 from the drill pipe 65 to be installed. A toothed nesting rotating device 2 is mounted on the clamping plate 100. The toothed nesting rotating device 2 drives the toothed nest 62 to rotate, causing the inner toothed insert 621 of the toothed nest 62 to be misaligned with the outer toothed insert 611 of the drill rod segment 61. Thus, the drill rod 65 to be installed, located above, is relatively stationary with respect to the drill rod segment 61, which is fixed by the first clamping plate 101 and the second clamping plate 102. The toothed nesting rotating device 2 drives the toothed nest 62 to rotate, causing the inner toothed insert 621 of the toothed nest 62 to be misaligned with the outer toothed insert 611 of the drill rod segment 61, allowing the drill rod segment 61 to separate from the drill rod 65 to be installed. A toothed nesting lifting device 1 is movably mounted on the clamping plate 100, and the toothed nesting lifting device 1 drives the toothed nest 62 to rise. After the inner toothed insert 621 of the toothed nest 62 is misaligned with the outer toothed insert 611 of the drill pipe segment 61, the toothed nest lifting device 1 drives the toothed nest 62 to rise, so that the drill pipe segment 61 can be removed from the toothed nest 62, thereby separating the drill pipe 65 to be installed and the drill pipe segment 61. Therefore, the technical solution of this embodiment effectively solves the problem of difficult operation and low work efficiency in the connection and disassembly of the drill pipe to be installed and the drill pipe segment in the related art.

[0048] It should be noted that the proximity and distance of the first clamping plate 101 relative to the second clamping plate 102 are relative. When the first clamping plate 101 is in the clamping position, the distance between the first clamping plate 101 and the second clamping plate 102 is less than the distance between the first clamping plate 101 and the second clamping plate 102 when the first clamping plate 101 is in the avoidance position.

[0049] As shown in Figures 1 to 13, the tooth-nesting rotating device 2 includes a base 2-10, a first telescopic member 2-20, and a rope 2-40. The base 2-10 is mounted on the clamping plate 100 to facilitate the mounting of the tooth-nesting rotating device 2. The first end of the first telescopic member 2-20 is rotatably connected to the base 2-10. A rope connecting seat 2-30 is connected to the second end of the first telescopic member 2-20. The first end of the rope 2-40 is connected to the rope connecting seat 2-30, and the second end of the rope 2-40 is connected to the outer wall of the tooth nest 62. The rope connecting seat 2-30 facilitates the connection between the first telescopic member 2-20 and the rope 2-40. The first end of the first telescopic member 2-20 is rotatably connected to the base 2-10, so that the axis of the rope 2-40 can coincide with the axis of the first telescopic member 2-20 during the rotation of the toothed nest 62. This facilitates the application of force by the first telescopic member 2-20 and improves the efficiency of the first telescopic member 2-20 in rotating the toothed nest 62. In this embodiment, a rope loop 64 is provided on the outer wall of the toothed nest 62, and an arc-shaped insert groove is also provided on the top wall of the toothed nest 62. An anti-rotation insert is inserted into the insert groove, and the lower end of the anti-rotation insert extends into the space between the adjacent outer toothed insert 611 and inner toothed insert 621 to prevent the toothed nest 62 from rotating relative to the drill rod segment 61. When disassembling the drill rod segment 61, the anti-rotation insert needs to be pulled outward first.

[0050] As shown in Figures 1 to 13, the tooth-nesting lifting device 1 includes: a base 1-1, a second telescopic member 1-50, and a lifting part 1-60. The base 1-1 is movably mounted on the clamping plate 100, so that the tooth-nesting lifting device 1 can move relative to the drill rod segment 61 fixed by the first clamping plate 101 and the second clamping plate 102, allowing the tooth-nesting lifting device 1 to move to the drill rod segment 61 and lift the tooth-nesting 62. The first end of the second telescopic member 1-50 is connected to the base 1-1, and the second telescopic member 1-50 is telescopically mounted in the vertical direction. The lifting part 1-60 is connected to the second end of the second telescopic member 1-50, and the upper end of the lifting part 1-60 can abut against the lower end of the tooth-nesting 62. The lifting part 1-60 is designed to lift the toothed nest 62, and the second telescopic part 1-50 can drive the lifting part 1-60 to move up and down. This design makes the lifting operation of the toothed nest 62 simpler and faster, and reduces the workload of the operator.

[0051] In this embodiment, to improve the stability of the toothed nest 62 during rotation and lifting, two toothed nest rotating devices 2 and two toothed nest lifting devices 1 are used. The two toothed nest rotating devices 2 are respectively mounted on the first clamping plate 101 and the second clamping plate 102, and the two toothed nest lifting devices 1 are respectively mounted on the first clamping plate 101 and the second clamping plate 102. The two toothed nest rotating devices 2 and the two toothed nest lifting devices 1 are symmetrically arranged with respect to the axis of the drill pipe segment 61. A toothed nest lifting device 1 is provided between two adjacent toothed nest rotating devices 2, and a toothed nest rotating device 2 is provided between two adjacent toothed nest lifting devices 1.

[0052] In this embodiment, the first clamping plate 101 is positioned close to the second clamping plate 102 and clamps the upper end of the drill rod segment 61, thus fixing the drill rod segment 61 between the first clamping plate 101 and the second clamping plate 102. Then, the toothed nest lifting device 1 is moved to the drill rod segment 61 and lifts the toothed nest 62, improving the convenience and safety of operation. After the drill rod segment 61 separates from the drill rod 65 to be installed, the toothed nest lifting device 1 moves away from the drill rod segment 61, and the first clamping plate 101 moves away from the second clamping plate 102, avoiding the upper end of the drill rod segment 61.

[0053] As shown in Figures 1 to 13, the tooth-nesting rotating device 2 further includes a ball joint unit 2-50 disposed between the first end of the first telescopic member 2-20 and the base 2-10. The ball joint unit 2-50 facilitates universal rotation between the first telescopic member 2-20 and the base 2-10. The base 2-10 is provided with a ball head 2-52 connecting portion. The ball joint unit 2-50 includes a ball head 2-52 receiving cavity disposed on the ball head 2-52 connecting portion and a ball head 2-52 disposed on the first end of the first telescopic member 2-20. A portion of the ball head 2-52 is inserted into the ball head 2-52 receiving cavity and engages with the cavity to prevent disengagement. The ball head 2-52 can rotate within the ball head 2-52 receiving cavity, allowing the first end of the first telescopic member 2-20 to rotate relative to the base 2-10. The ball joint unit 2-50 has a simple structure and is easy to manufacture. Furthermore, the ball head 2-52 connecting portion includes a connecting plate 2-51 disposed on the base 2-10 and a cover plate 2-54 detachably connected to the connecting plate 2-51. The connecting plate 2-51 is provided with a receiving groove 2-511 for accommodating a portion of the ball head 2-52, and the cover plate 2-54 is provided with an anti-detachment hole 2-531 communicating with the receiving groove 2-511. The receiving groove 2-511 and the anti-detachment hole 2-531 form a receiving cavity for the ball head 2-52. The arrangement of the cover plate 2-54, the receiving groove 2-511, and the anti-detachment hole 2-531 allows the ball head 2-52 to rotate within the receiving groove 2-511 without detaching from it, making the rotation of the first telescopic member 2-20 relative to the base 2-10 smoother and more reliable. The cover plate 2-54 includes a first cover plate 2-541 and a second cover plate 2-542. Part of the anti-detachment holes 2-531 are located on the first cover plate 2-541, and the other part of the anti-detachment holes 2-531 are located on the second cover plate 2-542. The diameter of the opening of the anti-detachment hole 2-531 on the side facing away from the connecting plate 2-51 is smaller than the diameter of the ball head 2-52. The arrangement of the first cover plate 2-541 and the second cover plate 2-542 facilitates the placement of the ball head 2-52 into its receiving cavity, making processing more convenient.

[0054] In this embodiment, the depth of the receiving groove 2-511 is less than the radius of the ball head 2-52. Preferably, the depth of the receiving groove 2-511 is 60% of the radius of the ball head 2-52.

[0055] As shown in Figures 1 to 13, the ball head 2-52 connecting part includes a connecting plate 2-51 disposed on the base 2-10 and a cover plate 2-54 detachably connected to the connecting plate 2-51. The connecting plate 2-51 is provided with a receiving groove 2-511 for accommodating part of the ball head 2-52, and the cover plate 2-54 is provided with an anti-detachment hole 2-531 communicating with the receiving groove 2-511. The receiving groove 2-511 and the anti-detachment hole 2-531 form a receiving cavity for the ball head 2-52. The arrangement of the cover plate 2-54, the receiving groove 2-511 and the anti-detachment hole 2-531 allows the ball head 2-52 to rotate within the receiving groove 2-511 without detaching from it, making the rotation of the first telescopic member 2-20 relative to the base 2-10 smoother and more reliable. The receiving groove 2-511 has a circular opening with a diameter greater than or equal to the diameter of the ball head 2-52, and a depth greater than or equal to the radius of the ball head 2-52. The diameter of the anti-detachment hole 2-531 gradually decreases from near the cover plate 2-54 to far away from the cover plate 2-54, with the maximum diameter of the anti-detachment hole 2-531 greater than or equal to the diameter of the ball head 2-52, and the minimum diameter of the anti-detachment hole 2-531 smaller than the diameter of the ball head 2-52. This facilitates the placement of the ball head 2-52 into its receiving cavity, making processing more convenient.

[0056] In this embodiment, the anti-detachment hole 2-531 has a rounded chamfer on its wall to allow the hole wall to make surface contact with the ball head 2-52, improving the stability during rotation. The base 2-10 has a vertical connecting plate, and a horizontal connecting plate is fixedly connected to the clamping plate 100. The vertical connecting plate is connected to one end of the horizontal connecting plate. The first telescopic member 2-20 has a cylinder 2-21 and a hydraulic rod 2-22 with one end passing through the cylinder 2-21. The hydraulic rod 2-22 can slide along the axial direction of the rod body, and the other end of the hydraulic rod 2-22 extends out of the cylinder 2-21 and connects to the rope connecting seat 2-30. The connecting plate 2-51 is attached to the vertical connecting plate. The rope 2-40 is preferably a steel wire rope.

[0057] As shown in Figures 1 to 13, the tooth-nesting lifting device 1 further includes a guide rod 1-30 disposed on the base 1-1 and a slider 1-40 slidably sleeved on the guide rod 1-30. The guide rod 1-30 extends vertically, and the slider 1-40 is disposed between the second end of the lifting part 1-60 and the second telescopic member 1-50. The second telescopic member 1-50 drives the lifting part 1-60 to move vertically via the slider 1-40. The arrangement of the guide rod 1-30 and the slider 1-40 guides the vertical movement of the lifting part 1-60, making the vertical movement of the lifting part 1-60 more stable, thereby making the lifting of the tooth-nesting 62 by the lifting part 1-60 more stable and reliable. In this embodiment, the guide rod 1-30 is vertically arranged, and the second telescopic member 1-50 and the lifting part 1-60 are disposed on both sides of the slider 1-40.

[0058] As shown in Figures 1 to 13, the guide rod 1-30 is arranged parallel to the second telescopic component 1-50. The second telescopic component 1-50 includes a telescopic cylinder 1-51 and a telescopic rod 1-52. The lower end of the telescopic cylinder 1-51 is rotatably hinged to the base 1-1 via a first pin 1-511. The base 1-1 is provided with a hinge lug 1-11 for hinged to the lower end of the telescopic cylinder 1-51. The upper end of the telescopic rod 1-52 is hinged to the slider 1-40 via a second pin 1-521. The first pin 1-511 and the second pin 1-521 are arranged parallel to each other. This allows the second telescopic component 1-50 to be easily replaced by disassembling the first pin 1-511 and the second pin 1-521 without affecting the lifting effect of the toothed nest 62 of the lifting part 1-60.

[0059] As shown in Figures 1 to 13, the lifting part 1-60 is a lifting plate, located on one side of the base 1-1 and extending horizontally. A clearance groove 1-61 is provided on the side wall of the end of the lifting plate opposite to the second telescopic member 1-50, extending through both the upper and lower surfaces of the lifting plate. When the upper surface of the lifting plate abuts against the lower end of the toothed nest 62, the clearance groove 1-61 can prevent the outer toothed insert 611 of the drill rod segment 61 from entering and exiting within the toothed nest 62. The clearance groove 1-61 is a trapezoidal groove, with its opening gradually increasing in size from near the second telescopic member 1-50 to away from it. In this way, by providing a clearance groove 1-61 on the lifting part 1-60 to avoid the external toothed insert 611 of the drill pipe segment 61, the contact area between the lifting part 1-60 and the lower end face of the toothed insert 62 can be maximized when the lifting part 1-60 lifts the toothed insert 62, which facilitates the lifting operation and makes the lifting operation of the toothed insert 62 more stable and reliable. The projection of the clearance groove 1-61 in the vertical direction is an isosceles trapezoid with a wide opening and a narrow bottom. The height of the isosceles trapezoid is parallel to the sliding direction of the base plate 1-10 relative to the clamping plate 100.

[0060] In this embodiment, the lifting plate is connected to the upper end of the slider 1-40 and located on the side of the slider 1-40. The base 1-1 includes a base plate 1-10 movably disposed on the clamping plate 100 and a top plate 1-20 located above the base plate 1-10. The projection of the lifting part 1-60 in the vertical direction is outside the projection areas of the base plate 1-10 and the top plate 1-20 in the vertical direction. The plane on which the base plate 1-10 is located is parallel to the horizontal plane, and the top plate 1-20 is disposed parallel to the base plate 1-10. Guide rods 1-30 are connected between the top plate 1-20 and the base plate 1-10. There are two guide rods 1-30 spaced apart, and the slider 1-40 is slidably sleeved on the two guide rods 1-30. The base plate 1-10 can slide closer to or further away from the drill pipe segment 61 via a slide rail.

[0061] As shown in Figure 14, this application also provides a method for disassembling a toothed drill pipe, which is achieved through the aforementioned toothed drill pipe auxiliary disassembly device. The toothed drill pipe disassembly method includes the following steps:

[0062] Position the first clamping plate 101 in the clamping position and clamp the upper end of the drill rod segment 61 onto the clamping plate 100;

[0063] Connect the first end of rope 2-40 to rope connector 2-30, and connect the second end of rope 2-40 to the outer wall of tooth nest 62;

[0064] The first telescopic member 2-20 of the tooth nesting rotation device 2 is retracted to make the tooth nesting 62 rotate; it is determined whether the inner tooth clip 621 on the tooth nesting 62 and the outer tooth clip 611 on the drill rod segment 61 are completely misaligned;

[0065] When the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill rod segment 61 are completely misaligned, remove rope 2-40;

[0066] Move the tooth-nesting lifting device 1 to the tooth-nesting 62 so that the lifting part 1-60 contacts the lower surface of the tooth-nesting 62;

[0067] The lifting section 1-60 is raised to lift the toothed nest 62, thereby separating the toothed nest 62 from the drill pipe section 61.

[0068] Since the aforementioned toothed drill pipe auxiliary disassembly equipment can solve the problems of difficult operation and low work efficiency in the connection and disassembly of the drill pipe to be installed and the drill pipe segments in the related technology, the toothed drill pipe disassembly method using the aforementioned toothed drill pipe auxiliary disassembly equipment can solve the same technical problems.

[0069] In this embodiment, between the steps of placing the first clamping plate 101 in the clamping position, clamping the upper end of the drill rod segment 61 on the clamping plate 100, connecting the first end of the rope 2-40 to the rope connecting seat 2-30, and connecting the second end of the rope 2-40 to the outer wall of the tooth nest 62, the method further includes pulling out the anti-rotation insert plate.

[0070] In this embodiment, both the first telescopic component 2-20 and the second telescopic component 1-50 are telescopic hydraulic cylinders.

[0071] Further, the step of retracting the first telescopic member 2-20 of the tooth-nesting rotating device 2 to rotate the tooth-nesting 62 includes: reducing the oil pressure of the first telescopic member 2-20 from normal pressure to a first negative pressure value, causing the first telescopic member 2-20 rod to retract, tightening the rope 2-40, and keeping the axis of the rope 2-40 aligned with the axis of the first telescopic member 2-20 by rotating the first telescopic member 2-20 relative to the base 2-10; continuing to reduce the oil pressure of the first telescopic member 2-20 to a second negative pressure value, causing the rope 2-40 to drive the tooth-nesting 62 to rotate.

[0072] Further, the step of moving the tooth-nesting lifting device 1 to the tooth-nesting 62 so that the lifting part 1-60 contacts the lower surface of the tooth-nesting 62 includes: increasing the oil pressure of the second telescopic member 1-50 from atmospheric pressure to a first positive pressure value, so that the lifting part 1-60 moves upward and fits against the lower end face of the tooth-nesting 62.

[0073] Further, the step of raising the lifting part 1-60 to lift the toothed nest 62 and separating the toothed nest 62 from the drill pipe segment 61 includes: continuing to increase the oil pressure of the second telescopic member 1-50 to a second positive pressure value, so that the lifting part 1-60 lifts the toothed nest 62 upward, so that the toothed nest 62 is completely disengaged from the drill pipe segment 61, thus completing the disassembly of the toothed nest 62.

[0074] Further, the step of determining whether the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill pipe segment 61 are completely misaligned includes: retracting the first telescopic member 2-20 with a preset force; determining whether the first telescopic member 2-20 stops retracting; when the first telescopic member 2-20 stops retracting, it is determined that the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill pipe segment 61 are completely misaligned. The toothed nest 62 is first rotated by the rope 2-40, and then due to the weight of the drill pipe segment 61 itself, part of the outer toothed insert 611 of the drill pipe segment 61 enters into the inner toothed insert 621 on the toothed nest 62 below, so that the retraction of the first telescopic member 2-20 stops when the preset force remains unchanged. At this time, it is determined that the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill pipe segment 61 are completely misaligned.

[0075] Further, the step of determining whether the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill pipe segment 61 are completely misaligned includes: detecting the angle of rotation of the first telescopic member 2-20 relative to the base 2-10; if the angle of rotation of the first telescopic member 2-20 relative to the base 2-10 reaches a set angle, it is determined that the inner toothed insert 621 on the toothed nest 62 and the outer toothed insert 611 on the drill pipe segment 61 are completely misaligned. In this embodiment, the predetermined angle is obtained by dividing 360° by the number of inner toothed inserts 621. The angle of rotation of the first telescopic member 2-20 relative to the base 2-10 needs to be detected by sensor control, which has high accuracy and a high degree of automation.

[0076] Furthermore, the steps for determining whether the inner tooth insert 621 on the toothed nest 62 and the outer tooth insert 611 on the drill rod segment 61 are completely misaligned include: during the rotation of the toothed nest 62, visually observing the gap between the toothed nest 62 and the drill rod segment 61 from below, observing the misalignment of the inner tooth insert 621 on the toothed nest 62 and the outer tooth insert 611 on the drill rod segment 61, and determining whether the inner tooth insert and the outer tooth insert 611 are completely misaligned; this method is simple, intuitive, and low in cost.

[0077] Applying the technical solution of this embodiment, the disassembly of the toothed drill rod 65 and drill rod segment 61 of the toothed drill rod 60 can be completed without manual rotation and prying of the toothed nest 62. This method requires minimal manual intervention, is simple and convenient to operate, and offers high efficiency, low labor intensity, and good safety. It can adapt to the disassembly of large-sized and heavy-duty toothed drill rods 60, exhibiting good reliability and high safety. During the disassembly process, the axis of the rope 2-40 can be kept aligned with the axis of the first telescopic member 2-20, facilitating the first telescopic member 2-20 to exert force and improve efficiency. It also maximizes the contact area between the lifting part 1-60 and the lower end face of the toothed nest 62, facilitating the lifting operation. The toothed drill rod disassembly method provided by this invention requires minimal manual intervention, is simple and convenient to operate, has good reliability, and can adapt to the disassembly of large-sized and heavy-duty toothed nests 62.

[0078] Applying the technical solution of this embodiment, as shown in Figures 7 and 8, the tooth-nesting lifting device includes: a base plate 1-10, a top plate 1-20, guide rods 1-30, a slider 1-40, a second telescopic member 1-50, and a lifting part 1-60. The plane containing the base plate 1-10 is parallel to the horizontal plane. The top plate 1-20 is arranged parallel above the base plate 1-10. There are two guide rods 1-30, arranged parallel to each other in the left-right direction. The slider 1-40 is slidably fitted onto all the guide rods 1-30. The second telescopic member 1-50 is used to drive the slider 1-40 to slide up and down along the guide rods 1-30. The lifting part 1-60 is connected to the front side of the slider 1-40 and extends forward. The lifting part 1-60 is located in front of the lower part of the top plate 1-20. The front side of the lifting part 1-60 is provided with a relief groove 1-61 that runs through the lifting part 1-60 along the thickness direction. The relief groove 1-61 is used to fit the outer wall of the drill pipe segment. The projection of the relief groove 1-61 in the vertical direction is an isosceles trapezoid. The width of the bottom of the relief groove 1-61 in the horizontal direction is 71% of the width of the opening of the relief groove 1-61 in the horizontal direction. The depth of the relief groove 1-61 and the width of the opening of the relief groove 1-61 in the horizontal direction are set in accordance with the outer diameter of the drill pipe segment.

[0079] The advantage of this design is that the clearance groove allows the lifting part to get as close as possible to the outer wall of the drill pipe segment located below the toothed nest, adapting to the narrow annular area where the lower end face of the toothed nest protrudes from the outer wall of the drill pipe segment. This facilitates the use of the second telescopic component to lift the toothed nest. When using this device for toothed nest lifting operations, the work efficiency is high and the labor intensity is low.

[0080] Furthermore, the second telescopic component 1-50 is arranged parallel to the rear of the slider 1-40. The second telescopic component 1-50 extends in the vertical direction and includes a telescopic cylinder 1-51 and a telescopic rod 1-52. The lower end of the telescopic cylinder 1-51 is rotatably connected to the hinge 1-11 provided on the base plate 1-10 via a first pin 1-511. The upper end of the telescopic rod 1-52 is rotatably connected to the connecting plates 1-70 located on both sides of the telescopic rod 1-52 via a second pin 1-521. The first pin 1-511 and the second pin 1-521 are arranged parallel to each other. The connecting plates 1-70 extend in the front-back direction. The front end of the mounting plate 1-40 is connected to the slider 1-40. Further, the slider 1-40 includes a slider body and a mounting plate 1-42 connected above the slider body. The mounting plate 1-42 is parallel to the base plate 1-10. The mounting plate 1-42 has a through hole 1-421 for the guide rod 1-30 to pass through. The rear end of the mounting plate 1-42 protrudes rearward from the slider body and is connected to the front end of the connecting plate 1-70. Further, the plane of the connecting plate 1-70 is parallel to the axis of the telescopic rod 1-52. The front end of the connecting plate 1-70 is provided with a U-shaped groove 1-71, and the rear end of the mounting plate 1-42 is embedded in the groove 1-71.

[0081] The advantage of this design is that the second telescopic component can be easily disassembled and assembled by removing the first and second pins. It is also convenient to operate when replacing the second telescopic component with different models or diameters to adapt to the jacking operation of teeth with different weights.

[0082] Preferably, a support plate 1-43 is fitted to the front side of the slider 1-40. The support plate 1-43 is located below and in front of the top plate 1-20. The upper end of the support plate 1-43 protrudes upward from the upper end surface of the slider 1-40. The upper end of the support plate 1-43 is perpendicularly connected to the rear end of the lifting part 1-60. To improve strength, a first reinforcing plate 1-431 is further provided between the support plate 1-43 and the lifting part 1-60. The projection of the first reinforcing plate 1-431 in the left-right direction is a right-angled triangle. The first reinforcing plate 1-431 is provided on the left and right sides of the clearance groove 1-61 and is located behind the clearance groove 1-61. The two perpendicular sides of the first reinforcing plate 1-431 are perpendicularly connected to the front surface of the support plate 1-43 and the lower surface of the lifting part 1-60, respectively.

[0083] Furthermore, the tooth-nesting lifting device also includes a vertical plate 1-80, which is connected between the bottom plate 1-10 and the top plate 1-20 and located behind the second telescopic member 1-50. The vertical plate 1-80 extends in the vertical direction, and a second reinforcing plate 1-81 is provided behind the vertical plate 1-80. The projection of the second reinforcing plate 1-81 in the left-right direction is a right-angled triangle. The two perpendicular sides of the second reinforcing plate 1-81 are perpendicularly connected to the rear surface of the vertical plate 1-80 and the upper surface of the bottom plate 1-10, respectively.

[0084] Applying the technical solution of this embodiment, as shown in Figures 9 to 13, the tooth-nesting rotating device includes a base 2-10, a first telescopic member 2-20, a rope connecting seat 2-30, a rope 2-40, and a ball joint unit 2-50. The base 2-10 has a horizontally connected horizontal plate 2-11 and a vertical plate 2-12. The first telescopic member 2-20 includes a cylinder 2-21 and a hydraulic rod 2-22. The cylinder 2-21 is connected to the left side of the vertical plate 2-12. The right end of the hydraulic rod 2-22 is axially movable and passes through the cylinder 2-21, while the left end of the hydraulic rod 2-22 protrudes to the left from the cylinder 2-21. The rope connecting seat 2-30 is connected to the end (left end) of the hydraulic rod 2-22 that protrudes from the cylinder 2-21. One end of the rope 2-40 is connected to the rope loop 64 on the outer wall of the toothed nest 62, and the other end is connected to the rope connecting seat 2-30. The ball joint unit 2-50 is used to connect the cylinder 2-21 and the vertical plate 2-12. The ball joint unit 2-50 is disposed between the cylinder 2-21 and the vertical plate 2-12, so that the cylinder 2-21 can rotate freely relative to the vertical plate 2-12. This free rotation includes rotation about a first rotation axis and rotation about a second rotation axis. The first rotation axis is perpendicular to the vertical plate 2-12 and passes through the center of the ball joint unit 2-50. When the cylinder 2-21 rotates about the second rotation axis, the rotation plane of the cylinder 2-21 is perpendicular to or intersects the vertical plate 2-12. The angle of rotation of the cylinder 2-21 about the second rotation axis is approximately 0° to 85°.

[0085] The advantage of this design is that when the tooth-nesting rotating device is pulled to rotate by the rope 2-40, the free rotation of the cylinder 2-21 relative to the vertical plate 2-12 allows the rope 2-40 to be kept as straight as possible with the axis of the cylinder 2-21. This facilitates the application of force by the first telescopic component and improves the efficiency of the first telescopic component 2-20. It eliminates the need for pry bars, levers, etc., resulting in better safety, higher work efficiency, and lower labor intensity.

[0086] In this embodiment, the ball joint unit 2-50 includes a connecting plate 2-51, a ball head 2-52, and a cover plate 2-54. The connecting plate 2-51 is fitted to the left side of the vertical plate 2-12, and a receiving groove 2-511 is provided in the center of the connecting plate 2-51. The ball head 2-52 is connected to the end (right end) of the cylinder 2-21 facing the vertical plate 2-12. A portion of the ball head 2-52 is rotatably inserted into the receiving groove 2-511 to form an insertion part 2-521. The outer wall of the insertion part 2-521 is fitted to the inner wall of the receiving groove 2-511. The cover plate 2-54 is connected to the connecting plate 2-51. The cover plate covers the receiving groove 2-511, and the cylinder body 2-21 penetrates the anti-dislodgement hole 2-531 on the cover plate. Furthermore, the depth of the receiving groove 2-511 is less than or equal to the radius of the receiving groove 2-511. The inner wall of the anti-dislodgement hole 2-531 is provided with an arc-shaped chamfer so that the inner wall of the anti-dislodgement hole 2-531 contacts the outer wall surface of the insertion part 2-521. Furthermore, the cover plate 2-54 includes a first cover plate 2-541 and a second cover plate 2-542 symmetrically distributed on both sides of the center of the ball head 2-52. There is a gap 2-532 between the surfaces of the first cover plate 2-541 and the second cover plate 2-542 facing each other.

[0087] In this embodiment, the rope connecting seat 2-30 includes a seat body 2-31, a third pin 2-32, and a fourth pin 2-33. The projection of the seat body 2-31 in the vertical direction is H-shaped. The seat body 2-31 has a first waist-shaped plate 2-311 and a second waist-shaped plate 2-312 arranged in parallel, and a partition 2-313 vertically connected to the middle of the first waist-shaped plate 2-311 and the second waist-shaped plate 2-312. The third pin 2-32 is vertically connected to the first waist-shaped plate 2-312. 11. One end of the second waist-shaped plate 2-312 and the fourth pin 2-33 are vertically connected to the other end of the first waist-shaped plate 2-311 and the second waist-shaped plate 2-312. The end of the hydraulic rod 2-22 away from the cylinder body 2-21 (left end) is clamped between the first waist-shaped plate 2-311 and the second waist-shaped plate 2-312 and is rotatably connected to the third pin 2-32. The end of the rope 2-40 away from the toothed nest 62 is connected to the fourth pin 2-33 through the rope hanging ring 64.

[0088] In this embodiment, the projection of the base 2-10 in the front-back direction is L-shaped. The lower end of the vertical plate 2-12 is perpendicularly connected to the left end of the horizontal plate 2-11. The left side of the vertical plate 2-12 is used to connect the cylinder 2-21. The horizontal plate 2-11 has multiple bolt holes 2-111 for fixing bolts to pass through. Furthermore, the base 2-10 also includes a third reinforcing plate 2-13. The projection of the third reinforcing plate 2-13 in the front-back direction is a right triangle. The two perpendicular sides of the third reinforcing plate 2-13 are perpendicularly connected to the right side of the vertical plate 2-12 and the upper surface of the horizontal plate 2-11, respectively. There are two third reinforcing plates 2-13, which are arranged parallel to each other in the front-back direction.

[0089] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0090] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0091] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A toothed drill pipe auxiliary disassembly device, used to disassemble drill pipe segments (61) from a drill pipe (65) to be installed with toothed inserts (62), characterized in that, The tooth-clamping drill pipe auxiliary disassembly device includes: a clamping plate (100), comprising a first clamping plate (101) and a second clamping plate (102), wherein the first clamping plate (101) is movably disposed relative to the second clamping plate (102), and the first clamping plate (101) has a clamping position close to the second clamping plate (102) and clamping the upper end of the drill pipe segment (61) and a clearance position away from the second clamping plate (102) and avoiding the upper end of the drill pipe segment (61); and a tooth-clamping rotating device (2), disposed on the first clamping plate (101) and the second clamping plate (102). On the clamping plate (102), the tooth nesting rotating device (2) drives the tooth nest (62) to rotate so that the inner tooth insert (621) of the tooth nest (62) is misaligned with the outer tooth insert (611) of the drill pipe segment (61); the tooth nesting lifting device (1) is movably disposed on the first clamping plate (101) and the second clamping plate (102), and the tooth nesting lifting device (1) drives the tooth nest (62) to rise; wherein, the tooth nesting rotating device (2) includes: a base (2-10) disposed on the first clamping plate (101) and the second clamping plate (102). 2) The first telescopic member (2-20) is rotatably connected at its first end to the base (2-10); the rope connecting seat (2-30) is connected to the second end of the first telescopic member (2-20); the rope (2-40) is connected at its first end to the rope connecting seat (2-30) and at its second end to the outer wall of the toothed nest (62); the toothed nest lifting device (1) includes: a seat (1-1) movably disposed between the first clamping plate (101) and the second clamping plate (62); On the holding plate (102); a second telescopic member (1-50), the first end of which is connected to the base (1-1), and the second telescopic member (1-50) is telescopically arranged in the vertical direction; a lifting part (1-60), which is connected to the second end of the second telescopic member (1-50), and the upper end of the lifting part (1-60) can abut against the lower end of the tooth nest (62); wherein, the tooth nest rotating device (2) further includes a ball joint unit (2-50) disposed between the first end of the first telescopic member (2-20) and the base (2-10).The base (2-10) is provided with a ball joint (2-52) connecting part. The ball joint unit (2-50) includes a ball joint (2-52) receiving cavity provided on the ball joint (2-52) connecting part and a ball joint (2-52) provided on the first end of the first telescopic member (2-20). Part of the ball joint (2-52) is inserted into the ball joint (2-52) receiving cavity and is anti-detached from the ball joint (2-52) receiving cavity. The ball joint (2-52) can rotate within the ball joint (2-52) receiving cavity so that the first end of the first telescopic member (2-20) can rotate relative to the base (2-10). The lifting part (1-60) is a lifting plate. The lifting plate is located on one side of the base (1-1) and extends horizontally. A clearance groove (1-61) is provided on the side wall of the end of the lifting plate opposite to the second telescopic member (1-50). The clearance groove (1-61) penetrates the upper and lower surfaces of the lifting plate. When the upper surface of the lifting plate abuts against the lower end of the toothed nest (62), the clearance groove (1-61) can prevent the outer toothed insert (611) of the drill rod segment (61) from entering and exiting within the toothed nest (62). The clearance groove (1-61) is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases in size from near the second telescopic member (1-50) to away from the second telescopic member (1-50).

2. The tooth-clamp type drill pipe auxiliary disassembly device according to claim 1, characterized in that, The ball head (2-52) connecting part includes a connecting plate (2-51) disposed on the base (2-10) and a cover plate (2-54) detachably connected to the connecting plate (2-51). The connecting plate (2-51) is provided with a receiving groove (2-511) for accommodating part of the ball head (2-52), and the cover plate (2-54) is provided with an anti-detachment hole (2-531) communicating with the receiving groove (2-511). The receiving groove (2-511) and the anti-detachment hole (2-531) are connected together. 31) Forming a cavity for receiving the ball head (2-52); wherein, the cover plate (2-54) includes a first cover plate (2-541) and a second cover plate (2-542), a portion of the anti-detachment holes (2-531) are provided on the first cover plate (2-541), and another portion of the anti-detachment holes (2-531) are provided on the second cover plate (2-542), and the diameter of the opening of the anti-detachment hole (2-531) on the side away from the connecting plate (2-51) is smaller than the diameter of the ball head (2-52).

3. The tooth-clamp type drill pipe auxiliary disassembly device according to claim 1, characterized in that, The ball head (2-52) connecting part includes a connecting plate (2-51) disposed on the base (2-10) and a cover plate (2-54) detachably connected to the connecting plate (2-51). The connecting plate (2-51) is provided with a receiving groove (2-511) for receiving part of the ball head (2-52), and the cover plate (2-54) is provided with an anti-detachment hole (2-531) communicating with the receiving groove (2-511). The receiving groove (2-511) and the anti-detachment hole (2-531) form a receiving cavity for the ball head (2-52); wherein, the receiving... The groove (2-511) has a circular opening, the diameter of which is greater than or equal to the diameter of the ball head (2-52), and the depth of the receiving groove (2-511) is greater than or equal to the radius of the ball head (2-52). The diameter of the anti-detachment hole (2-531) gradually decreases in the direction from near the cover plate (2-54) to away from the cover plate (2-54). The maximum diameter of the anti-detachment hole (2-531) is greater than or equal to the diameter of the ball head (2-52), and the minimum diameter of the anti-detachment hole (2-531) is smaller than the diameter of the ball head (2-52).

4. The tooth-clamp type drill pipe auxiliary disassembly device according to claim 1, characterized in that, The tooth-nesting lifting device (1) further includes a guide rod (1-30) disposed on the seat (1-1) and a slider (1-40) slidably sleeved on the guide rod (1-30). The guide rod (1-30) extends in the vertical direction, and the slider (1-40) is disposed between the lifting plate and the second end of the second telescopic member (1-50).

5. The tooth-clamp type drill pipe auxiliary disassembly device according to claim 4, characterized in that, The guide rod (1-30) is arranged parallel to the second telescopic member (1-50). The second telescopic member (1-50) includes a telescopic cylinder (1-51) and a telescopic rod (1-52). The lower end of the telescopic cylinder (1-51) is rotatably hinged to the seat (1-1) via a first pin (1-511). The seat (1-1) is provided with a hinge lug (1-11) for hinged to the lower end of the telescopic cylinder (1-51). The upper end of the telescopic rod (1-52) is hinged to the slider (1-40) via a second pin (1-521). The first pin (1-511) and the second pin (1-521) are arranged parallel to each other.

6. A method for disassembling a toothed drill rod, characterized in that, The toothed drill pipe disassembly method is achieved by the toothed drill pipe auxiliary disassembly device as described in claim 1, which includes the following steps: placing the first clamping plate (101) in the clamping position, clamping the upper end of the drill pipe segment (61) between the first clamping plate (101) and the second clamping plate (102); connecting the first end of the rope (2-40) to the rope connecting seat (2-30), and connecting the second end of the rope (2-40) to the outer wall of the toothed nest (62); retracting the first telescopic member (2-20) of the toothed nest rotating device (2) to make the toothed nest (62) retract. 2) Rotate; determine whether the inner tooth clip (621) on the toothed nest (62) and the outer tooth clip (611) on the drill rod segment (61) are completely misaligned; when the inner tooth clip (621) on the toothed nest (62) and the outer tooth clip (611) on the drill rod segment (61) are completely misaligned, remove the rope (2-40); move the toothed nest lifting device (1) to the toothed nest (62) so that the lifting plate contacts the lower surface of the toothed nest (62); raise the lifting plate to lift the toothed nest (62) so that the toothed nest (62) is separated from the drill rod segment (61).

7. The method for disassembling a toothed drill pipe according to claim 6, characterized in that, The step of determining whether the inner tooth insert (621) on the tooth nest (62) and the outer tooth insert (611) on the drill rod segment (61) are completely misaligned includes: contracting the first telescopic member (2-20) with a preset force; determining whether the first telescopic member (2-20) stops contracting; when the first telescopic member (2-20) stops contracting, it is determined that the inner tooth insert (621) on the tooth nest (62) and the outer tooth insert (611) on the drill rod segment (61) are completely misaligned.

8. The method for disassembling a toothed drill pipe according to claim 6, characterized in that, The step of determining whether the inner tooth insert (621) on the tooth nest (62) and the outer tooth insert (611) on the drill rod segment (61) are completely misaligned includes: detecting the angle of rotation of the first telescopic member (2-20) relative to the base (2-10). If the angle of rotation of the first telescopic member (2-20) relative to the base (2-10) reaches a set angle, it is determined that the inner tooth insert (621) on the tooth nest (62) and the outer tooth insert (611) on the drill rod segment (61) are completely misaligned.

Images