Oriented drill rod in-hole fishing device

Abstract

The invention discloses a directional drilling rod in-hole fishing device, and relates to the field of building construction, the directional drilling rod in-hole fishing device comprises a drilling machine connecting rod, a fishing structure, a clamping structure and a magnetic attraction structure, the fishing structure is used for fishing a broken drilling rod, the clamping structure is used for clamping and fixing the broken drilling rod, and the magnetic attraction structure is used for adsorbing and fixing the broken drilling rod. A horn mouth is driven to enter a drill hole, the inner wall of the drill hole is broken through first cutting teeth and second cutting teeth, one end of a drill rod slides along the inner wall of a cavity to enter an inner cavity of the horn mouth, a pull rope is pulled, a movable block is driven to slide in an inner cavity of a movable cavity, and a plurality of steel cables are driven to move together; the movable ring and the extrusion ring are pulled to slide in the inner cavity of the mounting cavity, the inclined plane of the inner wall of the extrusion ring extrudes the inclined plane of the connecting block, the connecting block and the fixed block are pushed to move towards the middle of the cavity, one end of the drill rod in the cavity is clamped and fixed, and the drill rod is conveniently fished.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a fishing device in a directional drill rod hole. Background Art

[0002] During the construction of bridges, bored piles are usually required. The drilling construction is usually completed by rotating the drill rod in the mud with the drill bit. During the drilling process, due to the complexity of the geology and the fatigue characteristics of the drill rod, the drill rod is prone to breakage during the drilling process, and the broken drill rod falls to the bottom of the borehole.

[0003] When the drill pipe breaks and falls into the borehole, the inner diameter of the borehole shrinks due to groundwater leakage in the mudstone section inside the borehole. The common drill pipe salvage device is not convenient to penetrate into the bottom of the borehole due to the shrinkage of the borehole. In addition, when the drill pipe is lifted upward by the salvage device, the drill pipe is prone to slide downward due to the effect of its own weight, which reduces the stability of the drill pipe during salvage and is not convenient for salvaging the drill pipe. Summary of the invention

[0004] The object of the present invention is to provide a fishing device in a directional drill rod hole to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a directional drill rod hole fishing device, comprising a drilling rig connecting rod; It also includes a salvage structure, a clamping structure and a magnetic attraction structure, wherein the salvage structure is arranged at one end of the drilling rig connecting rod and is used to salvage the broken drill rod; The clamping structure is arranged on the salvage structure, and is used to clamp and fix the broken drill pipe; The magnetic attraction structure is arranged on the salvage structure, and is used for adsorbing and fixing the broken drill rod.

[0006] Preferably, the salvage structure comprises: A nut taper, wherein the nut taper is fixedly connected to one end of a drilling rig connecting rod; A bell mouth, the bell mouth is fixedly connected to one end of the nut cone, and the diameter of the bell mouth is larger than the nut cone; The cavity is arranged on the bell mouth, and the inner wall of the cavity is arranged in a bell shape.

[0007] Preferably, the salvage structure further comprises: A first pick, the first pick being fixedly connected to an outer wall of one end of the bell mouth, and the first pick being arranged in an annular array at intervals; A second pick, the second pick being fixedly connected to the outer wall of the other end of the bell mouth, and the second pick being arranged in an annular array at intervals; A thread groove is arranged on the outer wall of the screw nut.

[0008] Preferably, the clamping structure comprises: A fixing block, the fixing block is arranged in the inner cavity of the cavity, and the fixing blocks are arranged equidistantly in a circular array; A magnetic block, wherein the magnetic block is fixedly connected to an outer wall of the fixed block; A connecting block, one end of which is fixedly connected to the middle of the outer wall of the fixing block, and the other end of which is arranged in an inclined surface; A connecting rod, one end of which is fixedly connected to the outer wall of one end of the fixing block, and the connecting rod is slidably connected to the inner wall of the cavity; A limit block, the limit block is fixedly connected to the other end of the connecting rod; A first compression spring is movably sleeved with one end of the connecting rod, and a top end of the first compression spring is in contact with a lower surface of the limiting block.

[0009] Preferably, the clamping mechanism further comprises: An installation cavity, the installation cavity is arranged on the bell mouth, and the installation cavity is arranged in a circular ring shape; A movable ring, wherein the movable ring is arranged in the inner cavity of the installation cavity; An extrusion ring, one end of which is fixedly connected to the outer wall of the movable ring, and the inner wall of the extrusion ring is arranged in an inclined surface.

[0010] Preferably, the clamping mechanism further comprises: A steel cable, one end of which is fixedly connected to the outer wall of the extrusion ring; An active cavity, the active cavity being arranged inside the drilling rig connecting rod and the screw taper; A movable block, the movable block is inserted and arranged at one end of the inner cavity of the movable cavity, and the outer wall of the movable block is fixedly connected to the other end of the steel cable; A pull rope, one end of which is fixedly connected to the middle portion of the outer wall of the movable block.

[0011] Preferably, the clamping mechanism further comprises: A stopper 1, wherein the stopper 1 is fixedly connected to the inner wall of the installation cavity, and the stopper 1 is arranged at the back side of the extrusion ring; A second stopper, wherein the second stopper is fixedly connected to the inner wall of the mounting cavity and is arranged at the front position of the movable ring; A tension spring, one end of which is fixedly connected to the front side of the movable ring, and the tension springs are arranged at intervals in a ring array.

[0012] Preferably, the magnetic attraction structure includes: A movable plate, the movable plate being movably disposed in the inner cavity of the cavity; A connecting column, one end of which is fixedly connected to the middle of the back of the movable plate, and one end of which is interlaced with the inner wall of the cavity; The mounting groove is arranged on the inner wall of the cavity.

[0013] Preferably, the magnetic attraction structure further includes: A conductive block, wherein the conductive block is fixedly connected to the inner wall of the mounting groove; A mounting block, the mounting block is fixedly and interlacedly connected with one end of the connecting column, and the mounting block is movably arranged in the inner cavity of the mounting groove; A second compression spring is movably sleeved with one end of the connecting column.

[0014] Preferably, one end of the connecting column is arranged in a hemispherical shape, the connecting column and the conductive block are both made of conductive metal material, and the second compression spring is arranged between the mounting block and the inner wall of the mounting groove.

[0015] Technical effects and advantages of the present invention: (1) The present invention utilizes a configuration in which a bell mouth, a cavity, a first pick and a second pick are matched, and by connecting a drill connecting rod to the drill, the bell mouth is driven to enter the borehole, and the inner wall of the borehole is crushed by the first pick and the second pick, so that the bell mouth is conveniently moved inside the borehole. When the bell mouth moves to one end of the drill rod, one end of the drill rod slides along the inner wall of the cavity into the inner cavity of the bell mouth, so that the bell mouth is conveniently connected to the drill rod; (2) The present invention utilizes a coordinated arrangement of a pull rope, a movable block, a steel cable, a movable ring, a squeeze ring, a connecting block and a fixed block. By pulling the pull rope, the movable block is driven to slide in the inner cavity of the movable cavity, and the plurality of steel cables are driven to move together, and the movable ring and the squeeze ring are pulled to slide in the inner cavity of the installation cavity. The inclined surface of the inner wall of the squeeze ring is pressed against the inclined surface of the connecting block, and the connecting block and the fixed block are pushed to move toward the middle of the cavity, and one end of the drill pipe in the cavity is clamped and fixed, so as to facilitate the salvage of the drill pipe. (3) The present invention utilizes a coordinated arrangement of a movable plate, a connecting column, a conductive block and a magnetic block. One end of the drill rod is used to press the movable plate toward the back, thereby driving one end of the connecting column to be pressed into contact with the conductive block. The multiple magnetic blocks are energized to generate magnetic force, which attracts one end of the drill rod, thereby improving the stability of the drill rod grip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the side structure of the bell mouth of the present invention.

[0018] Figure 3It is a schematic diagram of the side cross-sectional structure of the bell mouth of the present invention.

[0019] Figure 4 It is a schematic diagram of the side cross-sectional structure of the extrusion ring of the present invention.

[0020] Figure 5 It is a front cross-sectional structural schematic diagram of the movable ring of the present invention.

[0021] Figure 6 For the present invention Figure 3 A is an enlarged structural diagram of FIG.

[0022] In the figure: 1. Drilling rig connecting rod; 2. Salvage structure; 21. Screw taper; 22. Bell mouth; 23. Cavity; 24. First pick; 25. Second pick; 26. Threaded groove; 3. Clamping structure; 31. Fixed block; 32. Magnetic block; 33. Connecting block; 34. Connecting rod; 35. Limiting block; 36. First compression spring; 37. Mounting cavity; 38. Movable ring; 39. Extrusion ring; 310. Steel cable; 311. Movable cavity; 312. Movable block; 313. Pull rope; 314. Block one; 315. Block two; 316. Tension spring; 4. Magnetic structure; 41. Movable plate; 42. Connecting column; 43. Mounting groove; 44. Conductive block; 45. Mounting block; 46. Second compression spring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides Figure 1-6 The salvage device for a directional drill rod hole shown in the figure comprises a drill rod 1, a salvage structure 2, a clamping structure 3 and a magnetic structure 4. The drill rod 1 is used to be connected to the drill rig to drive the salvage device into the borehole. The salvage structure 2 is arranged at one end of the drill rod 1, and is used to salvage the broken drill rod. The salvage structure 2 enters the borehole through the salvage structure 2, moves to the broken drill rod, and salvages the drill rod. The clamping structure 3 is arranged on the salvage structure 2, and is used to clamp and fix the broken drill rod. The clamping structure 3 is used to clamp and fix one end of the drill rod to facilitate grabbing the drill rod. The magnetic structure 4 is arranged on the salvage structure 2, and is used to adsorb and fix the broken drill rod. The magnetic structure 4 is used to generate magnetic force to attract the drill rod, thereby improving the stability of drill rod salvage.

[0025] Furthermore, the salvage structure 2 includes a screw taper 21, which is fixedly connected to one end of the drilling rig connecting rod 1, and the screw taper 21 is used to install and connect the bell mouth 22 with the drilling rig; a bell mouth 22, which is fixedly connected to one end of the screw taper 21, and the diameter of the bell mouth 22 is larger than the screw taper 21, so that it is convenient to enter the inside of the borehole through the bell mouth 22 and to grab the drill rod; a cavity 23, which is arranged on the bell mouth 22, and the inner wall of the cavity 23 is arranged in a trumpet shape, and the cavity 23 is used to accommodate one end of the drill rod. When the bell mouth 22 moves to the drill rod position, one end of the drill rod slides along the inner wall of the cavity 23 and enters the bell mouth 22 in the inner cavity, so it is convenient to connect the bell mouth 22 with the drill rod; the first pick 24, the first pick 24 is fixedly connected to the outer wall of one end of the bell mouth 22, and the first pick 24 is arranged in a ring array at intervals; the second pick 25, the second pick 25 is fixedly connected to the outer wall of the other end of the bell mouth 22, and the second pick 25 is arranged in a ring array at intervals, the first pick 24 and the second pick 25 move together with the bell mouth 22, and the first pick 24 and the second pick 25 are used to crush the inner wall of the borehole, so that the bell mouth 22 can move inside the borehole; the thread groove 26, the thread groove 26 is arranged on the outer wall of the nut taper 21, and the thread groove 26 is used for the installation of the bell mouth 22.

[0026] In particular, the clamping structure 3 includes a fixed block 31, which is arranged in the inner cavity of the cavity 23. The fixed blocks 31 are equidistantly arranged in a circular array, and are arranged in an arc shape. A groove is provided on the inner wall of the cavity 23, and the fixed block 31 is received in the inner cavity of the groove; a magnetic block 32, which is fixedly connected to the outer wall of the fixed block 31, and the magnetic block 32 moves with the fixed block 31, and is electrically connected to the connecting column 42, and is used to clamp and attract one end of the drill rod; a connecting block 33, one end of the connecting block 33 is fixedly connected to the middle part of the outer wall of the fixed block 31, and the other end of the connecting block 33 is arranged in an inclined surface, and the connecting block 33 is arranged to slide and intersect with the inner wall of the cavity 23, and is used to drive the fixed block 31 and the magnetic block 32 moves; a connecting rod 34, one end of the connecting rod 34 is fixedly connected to the outer wall of one end of the fixed block 31, the connecting rod 34 is slidably and interlacedly connected with the inner wall of the cavity 23, and the connecting rod 34 moves with the fixed block 31; a limiting block 35, the limiting block 35 is fixedly connected to the other end of the connecting rod 34, and the limiting block 35 is used to squeeze the first compression spring 36; a first compression spring 36, the first compression spring 36 is movably sleeved with one end of the connecting rod 34, the top of the first compression spring 36 is fitted with the lower surface of the limiting block 35, and the elastic effect of the first compression spring 36 is used to support the limiting block 35. When the fixed block 31 moves toward the middle, the connecting rod 34 drives the limiting block 35 to squeeze and deform the first compression spring 36, and uses the first compression spring 3 6, pushes the limit block 35 and the fixed block 31 back to the initial position, and stores the fixed block 31 in the inner cavity of the groove; the installation cavity 37, the installation cavity 37 is arranged on the bell mouth 22, the installation cavity 37 is arranged in a circular ring shape, and the installation cavity 37 is used to install the movable ring 38 and the extrusion ring 39; the movable ring 38, the movable ring 38 is arranged in the inner cavity of the installation cavity 37, and the movable ring 38 slides in the inner cavity of the installation cavity 37 to drive the extrusion ring 39 to move together; the extrusion ring 39, one end of the extrusion ring 39 is fixedly connected to the outer wall of the movable ring 38, and the inner wall of the extrusion ring 39 is arranged in an inclined surface, and the inclined surface of the inner wall of the extrusion ring 39 is in contact with the inclined surface of one end of the connecting block 33, and as the extrusion ring 39 moves horizontally, the connecting block 33 is squeezed The plurality of fixed blocks 31 and the magnetic block 32 are pushed toward the middle of the cavity 23 by pressure; the steel cable 310, one end of the steel cable 310 is fixedly connected to the outer wall of the extrusion ring 39, and the extrusion ring 39 is pulled by the plurality of steel cables 310, so that the movable ring 38 and the extrusion ring 39 slide in the inner cavity of the installation cavity 37; the movable cavity 311, the movable cavity 311 is arranged inside the drilling rig connecting rod 1 and the screw nut 21, and the movable cavity 311 is used to install the movable block 312 and the steel cable 310; the movable block 312, the movable block 312 is inserted and arranged at one end of the inner cavity of the movable cavity 311, and the outer wall of the movable block 312 is fixedly connected to the other end of the steel cable 310, and the steel cable 310 is connected to the pull rope 313 through the movable block 312;A pull rope 313, one end of which is fixedly connected to the middle of the outer wall of the movable block 312, the pull rope 313 is made of a steel cable material, one end of which is arranged outside the drilled hole, and the movable block 312 is driven to slide in the inner cavity of the movable cavity 311 by pulling the pull rope 313, driving the multiple steel cables 310 to move together; a stopper 314, a stopper 314 is fixedly connected to the inner wall of the installation cavity 37, and the stopper 314 is arranged at the back position of the extrusion ring 39, and the stopper 314 is used to limit the movement of the extrusion ring 39; a stopper 315, a stopper 315 is fixedly connected to the inner wall of the installation cavity 37, and the stopper 315 is arranged at the front position of the movable ring 38, and the stopper 315 is used to limit the movement of the movable ring 38 The movement is limited; the tension spring 316, one end of the tension spring 316 is fixedly connected to the front of the movable ring 38, the tension spring 316 is arranged in a ring array at intervals, and the other end of the tension spring 316 is fixedly connected to the inner wall of the installation cavity 37. The elastic action of the tension spring 316 is used to pull the movable ring 38 and the extrusion ring 39 toward the front, and by pulling the pull rope 313, the movable block 312 is driven to slide in the inner cavity of the movable cavity 311, and the multiple steel cables 310 are driven to move together, and the movable ring 38 and the extrusion ring 39 are pulled to slide in the inner cavity of the installation cavity 37. The inclined surface of the inner wall of the extrusion ring 39 is pressed against the inclined surface of the connecting block 33, pushing the connecting block 33 and the fixed block 31 to move toward the middle of the cavity 23, and clamping and fixing one end of the drill rod in the cavity 23. ;

[0027] Furthermore, the magnetic structure 4 includes a movable plate 41, which is movably arranged in the inner cavity of the cavity 23. When one end of the drill rod slides into the inner cavity of the cavity 23, the movable plate 41 is squeezed, and the movable plate 41 moves toward the back; a connecting column 42, one end of the connecting column 42 is fixedly connected to the middle of the back of the movable plate 41, and one end of the connecting column 42 is interlaced with the inner wall of the cavity 23, and the connecting column 42 moves with the movable plate 41; a mounting groove 43, the mounting groove 43 is arranged on the inner wall of the cavity 23, and the mounting groove 43 is used to accommodate the connecting column 42 and the conductive block 44; the conductive block 44, the conductive block 44 is fixedly connected to the inner wall of the mounting groove 43, and the conductive block 44 is connected to the external power supply of the drilling hole through an electrical connection line. When the connecting column When one end of 42 is squeezed and contacted with the conductive block 44, the multiple magnetic blocks 32 are energized to generate magnetic force to attract one end of the drill pipe; the mounting block 45, the mounting block 45 is fixedly inserted and connected with one end of the connecting column 42, the mounting block 45 is movably arranged in the inner cavity of the mounting groove 43, and the mounting block 45 moves with the connecting column 42 to squeeze and deform the second compression spring 46; the second compression spring 46, the second compression spring 46 is movably sleeved with one end of the connecting column 42, and the elastic action of the second compression spring 46 is utilized to push the connecting column 42 and the conductive block 44 to separate; one end of the connecting column 42 is arranged in a hemispherical shape, the connecting column 42 and the conductive block 44 are both made of conductive metal material, and the second compression spring 46 is arranged between the mounting block 45 and the inner wall of the mounting groove 43.

[0028] The working principle of the present invention is as follows: by connecting the drill rod 1 with the drill, the bell mouth 22 is driven to enter the borehole, and the inner wall of the borehole is crushed by the first pick 24 and the second pick 25, so that the bell mouth 22 can move inside the borehole. When the bell mouth 22 moves to one end of the drill rod, one end of the drill rod slides along the inner wall of the cavity 23 into the inner cavity of the bell mouth 22, so that the bell mouth 22 is conveniently connected to the drill rod. At the same time, by pulling the pull rope 313, the movable block 312 is driven in the inner cavity of the movable cavity 311. The movable ring 38 and the extrusion ring 39 slide in the inner cavity of the installation cavity 37, and the inclined surface of the inner wall of the extrusion ring 39 presses the inclined surface of the connecting block 33, pushing the connecting block 33 and the fixed block 31 to move toward the middle of the cavity 23, clamping and fixing one end of the drill rod in the cavity 23, and one end of the drill rod presses the movable plate 41 toward the back, driving one end of the connecting column 42 to be pressed and contacted with the conductive block 44, and energizing the multiple magnetic blocks 32 to generate magnetic force to attract one end of the drill rod.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fishing device for a directional drill rod hole, comprising: Drilling rig connecting rod (1); It is characterized in that it also comprises a salvage structure (2), a clamping structure (3) and a magnetic attraction structure (4); the salvage structure (2) is arranged at one end of the drilling rig connecting rod (1) and is used to salvage a broken drill rod; The clamping structure (3) is arranged on the salvage structure (2) and is used to clamp and fix the broken drill rod; The magnetic attraction structure (4) is arranged on the salvage structure (2) and is used to absorb and fix the broken drill rod.

2. A directional drilling rod in-hole fishing device according to claim 1, characterized in that: The salvage structure (2) comprises: A nut taper (21), wherein the nut taper (21) is fixedly connected to one end of a drilling rig connecting rod (1); A bell mouth (22), the bell mouth (22) being fixedly connected to one end of the nut cone (21), and the diameter of the bell mouth (22) being larger than that of the nut cone (21); A cavity (23), wherein the cavity (23) is arranged on the bell mouth (22), and an inner wall of the cavity (23) is arranged in a bell shape.

3. A directional drilling rod in-hole fishing device according to claim 2, characterized in that: The salvage structure (2) further comprises: First pick teeth (24), the first pick teeth (24) being fixedly connected to the outer wall of one end of the bell mouth (22), the first pick teeth (24) being arranged at intervals in a ring array; Second pick teeth (25), the second pick teeth (25) being fixedly connected to the outer wall of the other end of the bell mouth (22), the second pick teeth (25) being arranged at intervals in a ring array; A thread groove (26), wherein the thread groove (26) is arranged on the outer wall of the nut taper (21).

4. A directional drilling rod in-hole fishing device according to claim 3, characterized in that: The clamping structure (3) comprises: Fixed blocks (31), the fixed blocks (31) being arranged in the inner cavity of the cavity (23), the fixed blocks (31) being arranged equidistantly in a circular array; A magnetic block (32), wherein the magnetic block (32) is fixedly connected to an outer wall of the fixed block (31); A connecting block (33), one end of the connecting block (33) being fixedly connected to the middle portion of the outer wall of the fixing block (31), and the other end of the connecting block (33) being arranged in an inclined surface; A connecting rod (34), one end of the connecting rod (34) being fixedly connected to the outer wall of one end of the fixing block (31), and the connecting rod (34) being slidably interlaced with the inner wall of the cavity (23); a limit block (35), wherein the limit block (35) is fixedly connected to the other end of the connecting rod (34); A first compression spring (36), wherein the first compression spring (36) is movably sleeved with one end of the connecting rod (34), and the top end of the first compression spring (36) is in contact with the lower surface of the limiting block (35).

5. A directional drilling rod in-hole fishing device according to claim 4, characterized in that: The clamping mechanism (3) further comprises: A mounting cavity (37), the mounting cavity (37) being arranged on the bell mouth (22), the mounting cavity (37) being arranged in a circular ring shape; A movable ring (38), wherein the movable ring (38) is arranged in the inner cavity of the installation cavity (37); An extrusion ring (39), one end of which is fixedly connected to the outer wall of the movable ring (38), and the inner wall of the extrusion ring (39) is arranged in an inclined surface.

6. A directional drilling rod in-hole fishing device according to claim 5, characterized in that: The clamping mechanism (3) further comprises: A steel cable (310), one end of which is fixedly connected to the outer wall of the extrusion ring (39); An active cavity (311), wherein the active cavity (311) is arranged inside the drilling rig connecting rod (1) and the screw taper (21); A movable block (312), the movable block (312) being inserted into one end of the inner cavity of the movable cavity (311), and the outer wall of the movable block (312) being fixedly connected to the other end of the steel cable (310); A pull rope (313), one end of which is fixedly connected to the middle portion of the outer wall of the movable block (312).

7. A directional drill rod in-hole fishing device according to claim 6, characterized in that: The clamping mechanism (3) further comprises: A stopper (314), wherein the stopper (314) is fixedly connected to the inner wall of the mounting cavity (37), and the stopper (314) is arranged at the back side of the extrusion ring (39); A second stopper (315), the second stopper (315) being fixedly connected to the inner wall of the mounting cavity (37), and the second stopper (315) being arranged at a front position of the movable ring (38); A tension spring (316), one end of which is fixedly connected to the front surface of the movable ring (38), and the tension springs (316) are arranged at intervals in a ring array.

8. The fishing device in a directional drill hole according to claim 7, characterized in that: The magnetic attraction structure (4) comprises: A movable plate (41), the movable plate (41) being movably disposed in the inner cavity of the cavity (23); A connecting rod (42), one end of the connecting rod (42) being fixedly connected to the middle portion of the back side of the movable plate (41), and one end of the connecting rod (42) being interlaced with the inner wall of the cavity (23); A mounting groove (43), wherein the mounting groove (43) is arranged on an inner wall of the cavity (23).

9. A directional drilling rod in-hole fishing device according to claim 8, characterized in that: The magnetic attraction structure (4) further includes: A conductive block (44), the conductive block (44) being fixedly connected to an inner wall of the mounting groove (43); A mounting block (45), the mounting block (45) being fixedly connected to one end of the connecting column (42) by insertion, and the mounting block (45) being movably disposed in the inner cavity of the mounting groove (43); A second compression spring (46), the second compression spring (46) being movably sleeved to one end of the connecting column (42).

10. A fishing device in a directional drill hole according to claim 9, characterized in that: One end of the connecting column (42) is arranged in a hemispherical shape; the connecting column (42) and the conductive block (44) are both made of conductive metal material; and the second compression spring (46) is arranged between the mounting block (45) and the inner wall of the mounting groove (43).

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