A fishing tool for small diameter borehole longitudinal rods

Abstract

The utility model belongs to the prospecting engineering technical field, concretely is a kind of suitable for small-bore drilling longitudinal rod-shaped object fishing tool, including the handover part for connecting drilling tool, the pipe body part for being set in the handover part below for the rod-shaped object of being fished and the multiple steel wire strands for being set between handover part and pipe body part for the rod-shaped object of being fished for winding.The utility model has the advantages of being able to efficiently, conveniently fish the rod-shaped object dropped in small-bore drilling, to improve fishing success rate, reduce engineering cost, guarantee the advantage of the smooth progress of engineering.

Description

Technical Field

[0001] This utility model relates to the field of mineral exploration engineering technology; specifically, this utility model relates to a tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes. Background Technology

[0002] During the enlargement drilling of inspection holes in coal mine shafts, for example, when measuring inclination, if the inclination instrument falls to the bottom of the hole and cannot be retrieved in a timely and effective manner, it will not only affect the project progress and increase construction costs, but in severe cases, it may even lead to the scrapping of the entire borehole, causing greater economic losses. However, existing retrieval tools often suffer from problems such as inconvenient operation, low retrieval efficiency, and poor applicability when dealing with small-diameter boreholes, and cannot meet the needs of actual projects. Utility Model Content

[0003] In view of this, the present invention provides a tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, thereby solving or at least alleviating the aforementioned problems existing in the prior art.

[0004] To achieve the aforementioned objective, this utility model provides a tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, comprising a connector for connecting to the drill bit, a tube body disposed below the connector for fitting the rod-shaped object to be retrieved, and multiple strands of steel wire rope disposed between the connector and the tube body for winding the rod-shaped object to be retrieved.

[0005] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, the bottom end of the tube body is provided with an angled opening to increase the contact area with the rod-shaped object being retrieved.

[0006] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, an intermediate tube is connected between the joint and the tube body, and the steel wire rope strands are distributed sequentially along the axial direction within the intermediate tube, with gaps formed between the inner and outer ends of adjacent steel wire rope strands for inserting the tip of the rod-shaped object to be retrieved.

[0007] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, the lower part of the handle is configured as a cylindrical structure, and a sleeve is rotatably fitted on the outer side of the lower part of the handle, with a telescopic rod connected between the sleeve and the tube body.

[0008] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, a ratchet gear is fixedly sleeved at the top of the lower part of the handle, a ratchet block that engages with the ratchet gear is rotatably mounted on the top of the sleeve, a spring mounted on the sleeve is connected to one side of the ratchet block, and a lever is fixedly connected to one side of the ratchet block.

[0009] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, a casing is fixedly provided at the top of the lower part of the handle, the ratchet, spring, and ratchet block are all located within the casing wall, a through hole is provided on the side of the casing, and the outer end of the lever extends out of the casing from the through hole.

[0010] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, two telescopic rods are provided, which are symmetrically distributed. The top of the casing is provided with a through groove corresponding to the top of the telescopic rod. The top of the telescopic rod is provided with a first threaded groove, and the top of the lower part of the handle is provided with a second threaded groove. The upper part of the handle is threadedly engaged with the lower part.

[0011] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, the telescopic rod includes an upper rod body and a lower rod body, which are rotatably engaged with a sleeve and a tube body, respectively. Slider blocks are fixedly provided on both sides of the bottom side of the upper rod body, and arc-shaped grooves for the slider to rotate 90° are provided on both sides of the top of the inner cavity of the lower rod body. A strip groove for the slider to move up and down is provided on the inner wall of the lower rod body corresponding to the bottom of the arc-shaped groove.

[0012] In the aforementioned tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, optionally, a rod sleeve is provided on the surface of the casing, a threaded hole is provided at the bottom end of the rod sleeve, a positioning bolt is provided in the threaded hole, and two positioning holes with an included angle of 90° are provided on the surface of the upper rod body. The positioning bolt is inserted into the positioning hole to lock the upper rod body in the circumferential direction.

[0013] This utility model relates to a tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes. It can efficiently and conveniently retrieve rod-shaped objects that have fallen into small-diameter boreholes, thereby improving the success rate of retrieval, reducing project costs, and ensuring the smooth progress of the project. Attached Figure Description

[0014] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0017] Figure 3 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0018] Figure 4 This is a structural schematic diagram of Embodiment 4 of the present invention;

[0019] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0020] Figure 6 This utility model Figure 4 A schematic diagram with the shell removed;

[0021] Figure 7 This utility model Figure 6 Enlarged view at point B in the middle;

[0022] Figure 8 This is a structural schematic diagram of Embodiment 5 of the present utility model;

[0023] Figure 9 This is a cross-sectional view of the rod sleeve and telescopic rod in Embodiment Six of this utility model;

[0024] Figure 10 This utility model Figure 9 A schematic diagram of the lower middle rod.

[0025] Reference numerals: 1-Joint; 2-Tube body; 3-Wire rope strand; 4-Beveled opening; 5-Sleeve; 6-Telescopic rod; 6.1-Upper rod body; 6.2-Lower rod body; 6.3-Slider; 6.4-Arc groove; 6.5-Strip groove; 7-Ratchet; 8-Ratchet block; 9-Spring; 10-Lever; 11-Shell; 12-Through hole; 13-Through groove; 14-First threaded groove; 15-Second threaded groove; 16-Rod sleeve; 17-Threaded hole; 18-Positioning bolt; 19-Positioning hole; 20-Intermediate tube; 21-Gap. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Please refer to Figure 1 In one embodiment, a tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes includes a connector 1 for connecting to the drill bit, a tube body 2 located below the connector 1 for attaching the rod-shaped object to be retrieved, and multiple strands of steel wire rope 3 located between the connector 1 and the tube body 2 for winding the rod-shaped object to be retrieved.

[0028] An intermediate tube 20 is connected between the connector 1 and the tube body 2. The wire rope strands 3 are distributed sequentially along the axial direction inside the intermediate tube 20. A gap 21 is formed between the inner and outer ends of two adjacent wire rope strands 3 for the insertion of the top of the salvaged rod.

[0029] In use, the retrieval tool is connected to the drill bit using the connector 1. The tube body 2 is then placed over the rod-shaped object to be retrieved. The top of the rod-shaped object passes through the tube body 2 and inserts into the gap 21. The drill bit is then started to rotate the retrieval tool. At this time, the inner end of the wire rope strand 3 will be squeezed and deformed on the surface of the rod-shaped object to be retrieved, thus holding the rod-shaped object tightly. The top of the rod-shaped object will be locked in the gap between the wire rope strands 3. After that, it can be lifted directly to retrieve the rod-shaped object in time.

[0030] Furthermore, the bottom end of the tube body 2 is configured with a bevel 4 to increase the contact area with the rod-shaped object being retrieved. By providing the bevel 4, the contact area between the tube body 2 and the rod-shaped object is increased, which not only improves the friction but also, during rotation, allows the receiving part to rotate relative to the tube body 2 more effectively through contact with the rod-shaped object, thus achieving the winding and tightening of the wire rope. In a relatively specific embodiment, the bevel 4 can be configured in a horseshoe shape.

[0031] Example 2, please refer to Figure 2 In this embodiment, the upper and lower ends of the wire rope strand 3 are fixed to the joint 1 and the tube body 2 respectively, and the wire rope strand 3 is spiral in shape. The wire rope strand 3 is evenly distributed in the circumference of the joint 1 and the tube body 2.

[0032] Example 3, please refer to Figure 3 Based on Embodiment 1, the lower part of the connector 1 is configured as a cylindrical structure, and a sleeve 5 is rotatably fitted onto the outer side of the lower part of the connector 1. A telescopic rod 6 connects the sleeve 5 and the pipe body 2. By setting the sleeve 5, the connector 1 can rotate within the sleeve 5. By setting the telescopic rod 6, the sleeve 5 is connected to the pipe body 2. Therefore, when the drill bit drives the connector 1 to rotate and realize the rotation and winding of the wire rope strand 3, by holding the telescopic rod 6, the pipe body 2 can be better kept from rotating, improving the winding and tightening effect of the wire rope strand 3. At the same time, during the winding and tightening process of the wire rope strand 3, the telescopic rod 6 adapts to the upward movement of the pipe body 2 by its extension and retraction process.

[0033] Example 4, please refer to Figures 4 to 7 Based on Embodiment 2, a ratchet 7 is fixedly sleeved on the top of the lower part of the handle 1, a ratchet block 8 that engages with the ratchet 7 is rotatably installed on the top of the sleeve 5, a spring 9 installed on the sleeve 5 is connected to one side of the ratchet block 8, and a lever 10 is fixedly connected to one side of the ratchet block 8.

[0034] When the drill bit drives the connector 1 to rotate, thereby tightening the wire rope strands 3, the ratchet 7 rotates along with the connector 1. The ratchet block 8, under the action of the spring 9, locks the ratchet 7 in real time to prevent it from reversing, which would cause the connector 1 to reverse and loosen the wire rope strands 3. After the rod-shaped object is retrieved, the ratchet block 8 is separated from the ratchet 7 by operating the lever 10, allowing the connector 1 to rotate in the opposite direction, thus loosening the wire rope strands 3 from the retrieved rod-shaped object.

[0035] Furthermore, a housing 11 is fixedly installed at the top of the lower part of the handle 1. The ratchet 7, spring 9, and ratchet block 8 are all located inside the housing 11. A through hole 12 is provided on the side of the housing 11, and the outer end of the lever 10 extends out of the housing 11 through the through hole 12. By setting the housing 11, the ratchet 7 and ratchet block 8 are enclosed, preventing workers from accidentally touching them and improving safety.

[0036] Example 5, please refer to Figure 8 Based on Embodiment 3, two telescopic rods 6 are provided, symmetrically distributed. A through groove 13 is provided at the top of the casing 11 corresponding to the top of the telescopic rod 6. A first threaded groove 14 is provided at the top of the telescopic rod 6, and a second threaded groove 15 is provided at the top of the lower part of the connector 1. The upper part of the connector 1 is threadedly engaged with the lower part. By providing the first threaded groove 14, a rod body can be grafted onto the top of the telescopic rod 6 to extend its length. Simultaneously, by providing the second threaded groove 15, a rod body can be grafted onto the top of the upper part of the connector 1. After grafting, the upper part of the connector 1 is threadedly engaged with the top of the grafted rod body, allowing the length of the retrieval tool to be adjusted according to the hole depth, suitable for retrieval of rod-shaped objects in holes of different depths.

[0037] Example 6, please refer to Figure 9 and Figure 10 Based on Embodiment 2, the telescopic rod 6 includes an upper rod body 6.1 and a lower rod body 6.2. The upper rod body 6.1 and the lower rod body 6.2 are rotatably engaged with the sleeve 5 and the tube body 2, respectively. Slider 6.3 is fixedly provided on both sides of the bottom side of the upper rod body 6.1. Arc-shaped grooves 6.4 for the slider 6.3 to rotate 90° are provided on both sides of the top of the inner cavity of the lower rod body 6.2. A strip groove 6.5 for the slider 6.3 to move up and down is provided on the inner wall surface of the lower rod body 6.2 corresponding to the bottom of the arc-shaped groove 6.4.

[0038] When the retrieval tool is inserted to allow the rod-shaped object to be retrieved to effectively pass through the tube body 2 and insert into the gap of the wire rope strand 3, the slider 6.3, located within the arc-shaped groove 6.4 and offset from the strip groove 6.5, makes the telescopic rod 6 a rigid rod, providing sufficient downward force. After the tip of the rod-shaped object has passed through the gap of the wire rope strand 3, the upper rod body 6.1 is rotated until it cannot be rotated further. At this point, the slider 6.3 is directly above the strip groove 6.5, and the telescopic rod 6 becomes extendable.

[0039] Furthermore, a rod sleeve 16 is provided on the surface of the sleeve 5, and a threaded hole 17 is provided at the bottom end of the rod sleeve 16. A positioning bolt 18 is provided in the threaded hole 17. The surface of the upper rod body 6.1 is provided with two positioning holes 19 with an included angle of 90°. The positioning bolt 18 is inserted into the positioning hole 19 to lock the upper rod body 6.1 in the circumferential direction. Through the cooperation of the positioning bolt 18 and the two positioning holes 19, the upper rod body can be locked in a state where the slider 6.3 and the strip groove 6.4 are misaligned or aligned.

[0040] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes, characterized in that, It includes a connector (1) for connecting the drill bit, a tube body (2) located below the connector (1) for attaching the rod to be retrieved, and multiple strands of wire rope (3) located between the connector (1) and the tube body (2) for winding the rod to be retrieved.

2. The tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 1, characterized in that, The bottom end of the tube body (2) is set with a slanted opening (4) to increase the contact area with the salvaged rod-shaped object.

3. The tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 1, characterized in that, An intermediate tube (20) is connected between the connecting part (1) and the tube body part (2). The wire rope strands (3) are distributed axially in the intermediate tube (20). A gap (21) is formed between the inner and outer ends of two adjacent wire rope strands (3) for the top of the salvaged rod to be inserted.

4. The tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 1, characterized in that, The upper and lower ends of the wire rope strand (3) are fixed to the joint (1) and the tube (2) respectively, and the wire rope strand (3) is spiral in shape. The wire rope strand (3) is evenly distributed in the circumference of the joint (1) and the tube (2).

5. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 1, characterized in that, The lower part of the connector (1) is configured as a columnar structure, and a sleeve (5) is rotatably sleeved on the outer side of the lower part of the connector (1). A telescopic rod (6) is connected between the sleeve (5) and the tube body (2).

6. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 5, characterized in that, The lower part of the receiving part (1) is fixedly fitted with a ratchet gear (7), and the top of the sleeve (5) is rotatably fitted with a ratchet block (8) that engages with the ratchet gear (7). A spring (9) installed on the sleeve (5) is connected to one side of the ratchet block (8), and a lever (10) is fixedly connected to one side of the ratchet block (8).

7. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 6, characterized in that, The lower part of the receiving part (1) is fixedly provided with a casing (11). The ratchet (7), spring (9) and ratchet block (8) are all located in the wall of the casing (11). The side of the casing (11) is provided with a through hole (12). The outer end of the lever (10) extends out of the casing (11) from the through hole (12).

8. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 7, characterized in that, Two telescopic rods (6) are provided, and the two telescopic rods (6) are symmetrically distributed. The top of the sleeve (11) is provided with a through groove (13) corresponding to the top of the telescopic rod (6). The top of the telescopic rod (6) is provided with a first threaded groove (14). The top of the lower part of the connector (1) is provided with a second threaded groove (15), and the upper part of the connector (1) is threadedly engaged with the lower part.

9. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 6, characterized in that, The telescopic rod (6) includes an upper rod body (6.1) and a lower rod body (6.2). The upper rod body (6.1) and the lower rod body (6.2) are rotatably engaged with the sleeve (5) and the tube body (2), respectively. Sliders (6.3) are fixedly provided on both sides of the bottom side of the upper rod body (6.1). Arc grooves (6.4) for the slider (6.3) to rotate 90° are provided on both sides of the top of the inner cavity of the lower rod body (6.2). A strip groove (6.5) for the slider (6.3) to move up and down is provided on the inner wall surface of the lower rod body (6.2) corresponding to the bottom of the arc groove (6.4).

10. A tool for retrieving longitudinal rod-shaped objects from small-diameter boreholes according to claim 9, characterized in that, The sleeve (5) is provided with a rod sleeve (16) on its surface. The bottom end of the rod sleeve (16) is provided with a threaded hole (17). A positioning bolt (18) is provided in the threaded hole (17). The surface of the upper rod body (6.1) is provided with two positioning holes (19) with an included angle of 90°. The positioning bolt (18) locks the upper rod body (6.1) in the circumferential direction by inserting it into the positioning hole (19).

Images