Drill rod fishing head

Abstract

A drill rod grabbing part is arranged at the lower end of a fishing head body, a drill rod holding arm is installed on the edge of the lower portion of the drill rod grabbing part through a spring rotating shaft, a semi-through groove is formed in the side edge of the lower portion of the drill rod grabbing part, and a drill rod holding arm limiting block is installed in the semi-through groove through a sliding rail; the top of the fishing head body is provided with a screw; the bottom of the screw opening is provided with a concave hole, an electric control body is in threaded connection in the concave hole, a knocking section is arranged in the middle of the electric control body, a travel switch is fixedly installed at the lower end of the electric control body, and the lower surface of the drill rod grabbing part is concaved inwards to form a grabbing cavity, and drill rod grabbing claw moving grooves are formed in the side wall of the grabbing cavity at equal intervals. According to the ground drilling machine, a broken drill rod is straightened through the drill rod holding arm, the drill rod is attracted into the grabbing cavity through the strong magnet, then the drill rod stretching into the grabbing cavity is clamped by the drill rod grabbing petal, and the drill rod can be lifted out of a drill hole through the ground drilling machine. And the work progress of a driller can be effectively guaranteed, and economic losses are reduced.

Description

Technical Field

[0001] The invention relates to a drill rod salvaging device, in particular to a drill rod salvaging head. Background Art

[0002] In geological exploration activities, drill rods are often used to drill underground cores to understand the state of the strata. In the process of drilling cores, drill rod breakage accidents often occur. After a breakage accident occurs, the broken borehole can only be abandoned, another borehole is opened, and drilling work is restarted, which seriously affects the progress of drilling work and causes associated economic losses. At the same time, because the drill rod goes deep into the ground through the borehole, the ground staff can only determine whether the broken rod is firmly grasped by feeling, and need to constantly operate the salvage head up and down to visually determine whether the salvage is successful, resulting in low drill rod salvage efficiency. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a drill rod salvaging head, which can salvage the drill rod broken in the drill hole, effectively ensure the work progress of the driller and reduce economic losses. At the same time, it can inform the ground personnel after grabbing the drill rod, thereby improving the salvage efficiency.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a drill rod salvaging head, including a salvaging head body, an electric control body, a knocking section, a central rotating wheel, a knocking chamber, a spring, a knocking hammer, a movable groove for a drill rod grabbing claw, a drill rod grabbing flap, a grabbing chamber and a screw mouth. A drill rod grabbing part is arranged at the lower end of the salvaging head body, a drill rod holding arm is installed at the lower edge of the drill rod grabbing part through a spring rotating shaft, a semi-through groove is arranged at the lower side of the drill rod grabbing part, and a drill rod holding arm limit block is installed in the semi-through groove through a slide rail; a screw mouth is arranged at the top of the salvaging head body; a concave hole is arranged at the bottom of the screw mouth, and the electric control body is screwed in the concave hole, A knocking section is provided at the part, a travel switch is fixedly installed at the lower end of the electric control body, the lower end of the concave hole is connected to the travel tube cavity of the magnetic suction head, the travel switch extends into the preset travel tube cavity of the magnetic suction head in the fishing head body, the lower surface of the drill rod grabbing part is recessed inward to form a grabbing cavity, and the side wall of the grabbing cavity is provided with movable grooves for drill rod grabbing claws at equal intervals, the lower end of the drill rod grabbing petal is installed in the movable groove of the drill rod grabbing claw through a rotating shaft, the strong magnet mounting slide rod moves up and down in the travel tube cavity of the magnetic suction head, the lower end of the strong magnet mounting slide rod is fixedly connected to the strong magnet, the drill rod grabbing petal is arc-shaped, and a toothed protrusion is provided on the side facing the strong magnet mounting slide rod.

[0005] In addition, a drill pipe fishing head according to the above embodiment of the present invention may also have the following additional technical features:

[0006] As a further improvement of the present invention, the knocking cavity of the knocking section is opened on the side of the electronic control body, and three or four springs are evenly spaced on the side of the central rotating wheel driven by a motor are provided at the center of the circular knocking cavity. A knocking hammer is fixedly installed on the end of the spring, and the knocking hammer knocks the inner wall of the concave hole opened at the bottom of the screw mouth.

[0007] As a further improvement of the present invention, the electric control body has a built-in battery pack and a control machine.

[0008] As a further improvement of the present invention, a limiting block is fixedly installed outside the position where the drill rod arm is installed on the lower surface of the fishing head body.

[0009] As a further improvement of the present invention, a through groove is formed at the end of the drill rod arm, and a roller at the end of the arm is installed in the through groove via a rotating shaft.

[0010] As a further improvement of the present invention, a motor is built into the semi-through groove opened on the lower side of the drill rod grabbing part, and the gear at the output end of the motor engages with the toothed belt on the surface of the drill rod arm limit block, and the surface of the drill rod arm limit block is equipped with a limit protrusion.

[0011] Through the above scheme, the present invention has at least the following advantages: the broken drill rod is straightened by the drill rod arm, and the drill rod is adsorbed into the grabbing cavity by a strong magnet, and then the drill rod inserted into the grabbing cavity is clamped by the drill rod grabbing petal, and the ground drilling rig can lift the drill rod out of the borehole, which can effectively ensure the progress of the driller's work and reduce economic losses. At the same time, the ground personnel can be informed after the drill rod is grabbed, thereby improving the salvage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a bottom-view stereoscopic schematic diagram of a drill pipe fishing head;

[0013] Figure 2 yes Figure 1 A partial enlarged view of A;

[0014] Figure 3 It is a top-down stereogram of a drill pipe fishing head;

[0015] Figure 4 It is a structural diagram of a drill pipe fishing head;

[0016] Figure 5 yes Figure 4 A partial enlarged view of B;

[0017] Figure 6 The present invention is a bottom-view stereoscopic diagram of the deployed drill rod arm of a drill rod fishing head;

[0018] Figure 7 It is a structural diagram of the striking section of a drill pipe fishing head;

[0019] In the figure: 1. Salvage head body, 1-1. Electric control body, 1-2. Knocking section, 1-21. Center rotating wheel, 1-22. Knocking chamber, 1-23. Spring, 1-24. Knocking hammer, 1-3. Travel switch, 1-4. Travel tube chamber of magnetic suction head, 2. Drill rod arm, 2-1. Roller at the end of the arm, 3. Drill rod arm limit block, 4. Drill rod grabbing part, 4-1. Strong magnet, 4-2. Strong magnet mounting slide rod, 4-3. Drill rod grabbing claw movable groove, 4-4. Drill rod grabbing flap, 4-5. Grabbing chamber, 5. Screw mouth. DETAILED DESCRIPTION

[0020] A drill rod fishing head of the present invention will be described below with reference to the accompanying drawings.

[0021] In the first embodiment of the present application, Figures 1 to 5 As shown, a drill rod salvaging head (hereinafter referred to as "the present invention") comprises a salvaging head body 1, an electric control body 1-1, a striking section 1-2, a central rotating wheel 1-21, a striking cavity 1-22, a spring 1-23, a striking hammer 1-24, a travel switch 1-3, a magnetic suction head travel tube cavity 1-4, a drill rod arm 2, a roller 2-1 at the end of the arm, a drill rod arm limit block 3, a drill rod grabbing part 4, a strong magnet 4-1, a strong magnet mounting slide rod 4-2, a drill rod grabbing claw movable groove 4-3, a drill rod grabbing petal 4-4, a grabbing cavity 4-5 and a screw mouth 5. The drill rod grabbing part 4 is arranged at the lower end of the salvaging head body 1, the drill rod grabbing part 4 is installed at the lower edge of the drill rod grabbing part 4 through a spring rotating shaft, a semi-through groove is arranged on the lower side of the drill rod grabbing part 4, and the drill rod arm limit block 3 is installed in the semi-through groove through a slide rail; a screw mouth is arranged at the top of the salvaging head body 1 5; a concave hole is provided at the bottom of the screw mouth 5, and the electric control body 1-1 is screwed in the concave hole. A knocking section 1-2 is provided in the middle of the electric control body 1-1. A travel switch 1-3 is fixedly installed at the lower end of the electric control body 1-1. The lower end of the concave hole is connected to the magnetic suction head travel tube cavity 1-4. The travel switch 1-3 extends into the magnetic suction head travel tube cavity 1-4 preset in the fishing head body 1. The lower surface of the drill rod grasping part 4 is recessed inward to form a grasping cavity 4-5. The side wall of the grasping cavity 4-5 is provided with drill rod grasping claw movable grooves 4-3 at equal intervals. The lower end of the drill rod grasping flap 4-4 is installed in the drill rod grasping claw movable groove 4-3 through a rotating shaft. The strong magnet installation slide rod 4-2 moves up and down in the magnetic suction head travel tube cavity 1-4. The lower end of the strong magnet installation slide rod 4-2 is fixedly connected to the strong magnet 4-1. The drill rod grasping flap 4-4 is arc-shaped, and a toothed protrusion is provided on the side facing the strong magnet installation slide rod 4-2.

[0022] The structure of the second embodiment is basically the same as that of the first embodiment, except that Figure 7As shown, the knocking cavity 1-22 of the knocking section 1-2 is opened on the side of the electronic control body 1-1, and a central rotating wheel 1-21 driven by a motor is provided at the center of the circular knocking cavity 1-22. Three or four springs 1-23 are evenly spaced on the side, and a knocking hammer 1-24 is fixedly installed at the end of the spring 1-23. The knocking hammer 1-24 knocks on the inner wall of the concave hole opened at the bottom of the screw mouth 5.

[0023] In order to further optimize the working efficiency of the present application and to provide power to the equipment, the electric control body 1-1 has a built-in battery pack and a control machine. In order to ensure that the drill rod arm 2 will not be excessively turned outward, a limit block is fixedly installed outside the position where the drill rod arm 2 is installed on the lower surface of the salvage head body 1. In order to allow the drill rod arm 2 to adapt to the inner wall of the borehole and not be stuck by the protrusions on the inner wall of the borehole, a through groove is opened at the end of the drill rod arm 2, and a roller 2-1 at the end of the arm is installed in the through groove through a rotating shaft. In order to further facilitate the control of the opening of the drill rod arm 2, a motor is built into the semi-through groove opened on the lower side of the drill rod grabbing part 4, and the gear at the output end of the motor meshes with the toothed belt on the surface of the drill rod arm limit block 3, and the surface of the drill rod arm limit block 3 is equipped with a limit protrusion.

[0024] When in use, a drill pipe salvage head is installed at the lower end of the drill pipe and put into use by the Equipment Disease Control Department.

[0025] When the present invention is used, the specific operation is as follows:

[0026] When in use, the salvage head body 1 is installed at the lower part of the drill pipe through the screw mouth 5, and the descent parameters of the salvage head body 1 are set by wireless or wired means through terminals such as mobile phones or computers, and then the drilling rig controls the drill pipe to descend. After the salvage head body 1 reaches the predetermined depth, the acceleration sensor built into the electric control body 1-1 of the salvage head body 1 senses that the device stops descending, and the control machine in the electric control body 1-1 starts timing, usually for ten to twenty seconds. During this period, the acceleration sensor does not sense any rise or fall, and the control machine controls the motor of the drill pipe arm limit block 3 to drive the drill pipe arm limit block 3 to rise along the groove, unlocking the lock on the drill pipe arm 2, and the drill pipe arm 2 can be bounced open under the action of the spring shaft. Figure 6As shown, at this time, the staff can control the salvage head body 1 to rotate and descend slowly, and the drill rod arm 2 rotating with the salvage head body 1 continuously sweeps to pick up the broken drill rod. With the continuous rotation of the salvage head body 1 and the push of the drill rod arm 2, the broken drill rod gradually enters the grabbing cavity 4-5 of the drill rod grabbing part 4. At this time, the broken drill rod can be captured by the strong magnet 4-1. With the continued rotation and slow descent of the salvage head body 1, the broken drill rod can be inserted into the grabbing cavity 4-5, thereby lifting the strong magnet 4-1. The strong magnet 4-1 drives the strong magnet installation slide rod 4-2 to slide upward along the magnetic suction head travel tube cavity 1-4, and finally triggers the travel switch 1-3. At this time, After confirming that the broken drill pipe has entered the grabbing cavity 4-5 and pushed into place, the travel switch 1-3 sends a signal, and the control machine of the electric control body 1-1 controls the motor of the striking section 1-2 to drive the central rotating wheel 1-21, and the central rotating wheel 1-21 drives the spring 1-23 and the striking hammer 1-24 to strike the inner wall of the salvaging head body 1, and informs the staff at the drilling site that the drill pipe has been captured through the conduction of the salvaging head body 1 and the drill pipe, and then the drilling rig starts to lift. During the lifting, the drill pipe grabbing petal 4-4 contracts inwardly under the action of the spring shaft, so as to fit closely to the surface of the broken drill pipe, and as the drilling rig is lifted, the drill pipe grabbing petal 4-4 further contracts inwardly, clamps the broken drill pipe, and finally lifts the drill pipe. Since the drill rod grabbing flaps 4-4 are arc-shaped and have tooth-like protrusions on their surfaces, when the fishing head body 1 is lifted, the friction between the broken drill rod and the surface of the drill rod grabbing flaps 4-4 can make the multiple drill rod grabbing flaps 4-4 further fit the broken drill rod surface, thereby providing sufficient clamping force.

[0027] Among them, after the drill rod breaks, the lower end of the drill bit touches the bottom, and some collapsed mud and sand buries the drill bit, so that the drill rod itself is fixed. Therefore, when the drill rod arm 2 is working, it can be straightened to the vicinity of the grabbing cavity 4-5 and captured by the strong magnet 4-1. At the same time, since the broken drill rod itself is fixed by soil or sand and gravel, the lower edge of the continuously rotating drill rod grabbing part 4 can bring the broken drill rod end into the grabbing cavity 4-5 with the assistance of the strong magnet 4-1.

[0028] If the capture is not completed in one go, the capture process can be repeated multiple times.

[0029] In summary, a drill rod salvage head according to an embodiment of the present invention straightens a broken drill rod through the drill rod arm 2, and absorbs the drill rod into the grabbing cavity 4-5 by the strong magnet 4-1. Then, the drill rod inserted into the grabbing cavity 4-5 is clamped by the drill rod grabbing flap 4-4, and the ground drilling rig can lift the drill rod out of the borehole, which can effectively ensure the work progress of the drillers and reduce economic losses. At the same time, it can inform the ground personnel after grabbing the drill rod, thereby improving the salvage efficiency.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drill pipe fishing head, characterized in that: The lower end of the fishing head body (1) is provided with a drill rod grabbing part (4), the lower edge of the drill rod grabbing part (4) is installed with a drill rod arm (2) through a spring shaft, a semi-through groove is provided on the lower side of the drill rod grabbing part (4), and a drill rod arm limit block (3) is installed in the semi-through groove through a slide rail; a screw mouth (5) is provided at the top of the fishing head body (1); a concave hole is provided at the bottom of the screw mouth (5), and an electric control body (1-1) is screwed in the concave hole, a knocking section (1-2) is provided in the middle of the electric control body (1-1), a travel switch (1-3) is fixedly installed at the lower end of the electric control body (1-1), the lower end of the concave hole is connected to the magnetic suction head travel tube cavity (1-4), and the travel switch (1-3) The magnetic suction head extends into a preset travel tube cavity (1-4) in the fishing head body (1); the lower surface of the drill rod grabbing part (4) is recessed inward to form a grabbing cavity (4-5); the side wall of the grabbing cavity (4-5) is provided with drill rod grabbing claw movable grooves (4-3) at equal intervals; the lower end of the drill rod grabbing flap (4-4) is installed in the drill rod grabbing claw movable groove (4-3) through a rotating shaft; the strong magnet installation slide bar (4-2) moves up and down in the magnetic suction head travel tube cavity (1-4); the lower end of the strong magnet installation slide bar (4-2) is fixedly connected to the strong magnet (4-1); the drill rod grabbing flap (4-4) is arc-shaped, and a tooth-shaped protrusion is provided on the side facing the strong magnet installation slide bar (4-2).

2. A drill pipe fishing head according to claim 1, characterized in that: The knocking cavity (1-22) of the knocking section (1-2) is opened on the side of the electric control body (1-1), and three or four springs (1-23) are arranged at equal intervals on the side of a central rotating wheel (1-21) driven by a motor at the center of the circular knocking cavity (1-22), and a knocking hammer (1-24) is fixedly installed at the end of the spring (1-23), and the knocking hammer (1-24) knocks the inner wall of the concave hole opened at the bottom of the screw mouth (5).

3. A drill pipe fishing head according to claim 2, characterized in that: The electric control body (1-1) has a built-in battery pack and a control machine.

4. A drill pipe fishing head according to claim 1, characterized in that: A limiting block is fixedly installed outside the position where the drill rod arm (2) is installed on the lower surface of the fishing head body (1).

5. A drill pipe fishing head according to claim 4, characterized in that: A through groove is formed at the end of the drill rod arm (2), and a roller (2-1) at the end of the arm is installed in the through groove via a rotating shaft.

6. A drill pipe fishing head according to claim 1, characterized in that: A motor is built into the semi-through groove formed on the lower side of the drill rod grabbing portion (4), and a gear at the output end of the motor meshes with a toothed belt on the surface of the drill rod arm limit block (3), and a limit protrusion is provided on the surface of the drill rod arm limit block (3).

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