Special spiral fishing spear for rope fishes

Abstract

The utility model relates to the technical field of fish fishing spears, in particular to a special spiral fishing spear for rope fishes, which comprises an upper joint, a spear rod is fixedly connected to the bottom of the upper joint, a plurality of mounting grooves are arranged on the outer surface of the spear rod, spear teeth are movably mounted in the mounting grooves, and the spear teeth are fixedly connected with the spear rod. A spring is fixedly mounted between the mounting groove and the spear tooth, a tip is mounted at the bottom of the spear rod in a threaded mode, and a locking assembly is mounted in the spear rod; the locking assembly comprises a sliding rod, the sliding rod is slidably mounted in the spear rod, a sliding groove is formed in the side, close to the sliding rod, of the mounting groove, and a plurality of sliding blocks are fixedly connected to the outer surface of the sliding rod. According to the fishing spear, when the fishing spear is not used, the spear teeth can be folded, so that the fishing spear is not prone to being collided and damaged in the transportation process, the integrity of equipment is guaranteed, and equipment loss and maintenance cost caused by transportation are reduced.

Description

Technical Field

[0001] This utility model relates to the field of fish-catching spear technology, and in particular to a spiral fishing spear specifically designed for rope-type fish-catching. Background Technology

[0002] With social development, oil resources occupy a vital position in the global economy. The development and utilization of oil wells have become a key link in meeting energy demands. During oil drilling and extraction, various complex situations are frequently encountered. Among them, the problem of "rope fish" (or "rope falling into the well") is becoming increasingly prominent. "Rope fish" mainly refers to long, thin, rope-like objects such as cables and steel wires accidentally falling into the well. These rope fish can seriously affect the normal production and subsequent operations of the oil well, potentially obstructing drilling fluid circulation, affecting the normal operation of downhole equipment, and even causing safety accidents, posing a significant challenge to oil production.

[0003] However, existing salvage tools present many inconveniences during transportation and use. For example, the fangs of traditional salvage spears are usually in a fixed extended position, which makes the spears susceptible to damage from collisions during transportation, and also increases the difficulty and cost of transportation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a special spiral retrieval spear for rope-type fish catchers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spiral fishing spear for rope-type fish retrieval, comprising an upper connector, a spear shaft fixedly connected to the bottom of the upper connector, an installation groove formed on the outer surface of the spear shaft, the number of installation grooves being multiple, spear teeth being movably installed inside the installation groove, a spring being fixedly installed between the installation groove and the spear teeth, a pointed tip being threaded onto the bottom of the spear shaft, and a locking component being installed inside the spear shaft;

[0006] The locking assembly includes a sliding rod, which is slidably mounted inside the spear shaft. A groove is formed on the side of the mounting slot near the sliding rod. A slider is fixedly connected to the outer surface of the sliding rod. There are multiple sliders. A push block is fixedly connected to the spear teeth near the outer surface of the sliding rod. Both the slider and the push block are located inside the groove, and the slider is located above the push block.

[0007] Furthermore: the mounting groove is movably connected to a mounting shaft, and the spear teeth have a movable hole inside, which is located inside the mounting shaft.

[0008] Further: The inner wall of the mounting groove is provided with a first mounting hole, the inside of the spear teeth is provided with a second mounting hole, and the spring is installed between the first mounting hole and the second mounting hole.

[0009] Furthermore, the tip has a movable groove inside, and the bottom of the sliding rod is fixedly connected to a movable block, which is movably installed inside the movable groove.

[0010] Furthermore, a limiting groove is formed at the bottom of the spear shaft, and a limiting block is fixedly connected to the top of the tip, with the limiting block slidably installed inside the limiting groove.

[0011] Furthermore, the outer surface of the spear shaft is provided with a spiral groove.

[0012] This utility model has the following beneficial effects:

[0013] Compared with existing technologies, this invention, by incorporating an upper connector, spear shaft, mounting groove, spring, pointed tip, sliding rod, movable groove, movable block, slider, and push block, allows for the retrieval of rope-like fish from oil wells. The upper connector is installed on the drill pipe, and the pointed tip is rotated. Through the thread between the pointed tip and the spear shaft, the pointed tip moves downwards. Simultaneously, the movable groove and movable block engage, causing the sliding rod to move downwards along with the pointed tip. At this point, the slider is no longer on top of the push block and no longer presses down on the spear teeth. The spring then pushes the spear teeth outwards, and the retrieval spear is inserted into the oil well via the drill pipe, hooking the rope-like fish. After use, the sliding rod is moved downwards, causing the slider to press down on the push block again, retracting the spear teeth into the mounting groove for easy transport. This invention also allows the spear teeth to be retracted when not in use, preventing damage during transport and ensuring the integrity of the equipment, thus reducing equipment wear and maintenance costs caused by transportation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model in use;

[0016] Figure 3 This is a schematic cross-sectional view of the spear shaft and the pointed end in this utility model.

[0017] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0018] Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0019] Legend:

[0020] 1. Upper connector; 2. Spear rod; 201. Limiting groove; 3. Spiral groove; 4. Mounting groove; 401. Mounting shaft; 402. First mounting hole; 5. Spear teeth; 501. Movable hole; 502. Second mounting hole; 6. Spring; 7. Pointed tip; 701. Limiting block; 8. Locking assembly; 801. Sliding rod; 802. Movable groove; 803. Movable block; 804. Slide groove; 805. Sliding block; 806. Push block. Detailed Implementation

[0021] Reference Figure 1-5 This utility model provides a spiral fishing spear for rope-type fish retrieval: it includes an upper connector 1, a spear shaft 2 fixedly connected to the bottom of the upper connector 1, a mounting groove 4 with multiple mounting grooves 4 on the outer surface of the spear shaft 2, spear teeth 5 movably mounted inside the mounting groove 4, a spring 6 fixedly mounted between the mounting groove 4 and the spear teeth 5, a pointed tip 7 threadedly mounted at the bottom of the spear shaft 2, and a locking assembly 8 installed inside the spear shaft 2; the locking assembly 8 includes a sliding rod 801, a sliding rod 801 slidably mounted inside the spear shaft 2, a sliding groove 804 with the mounting groove 4 near the sliding rod 801, a slider 805 fixedly connected to the outer surface of the sliding rod 801 with multiple sliders 805, a push block 806 fixedly connected to the spear teeth 5 near the outer surface of the sliding rod 801, both the slider 805 and the push block 806 are located inside the sliding groove 804, with the slider 805 located above the push block 806.

[0022] During use, the slider 805 is located on top of the push block 806, pressing down on the spear teeth 5 and fixing them inside the mounting groove 4. When retrieving fish that have fallen into the oil well, the upper connector 1 is installed on the drill pipe, and then the screw 2 is rotated to control the sliding rod 801 to move upward. At this time, the slider 805 is no longer located on top of the push block 806 and no longer presses down on the spear teeth 5. Then, the spring 6 pushes the spear teeth 5 outward, and the retrieval spear is sent into the oil well through the drill pipe, where the spear teeth 5 can hook the fish that have fallen into the oil well. After use, the sliding rod 801 is controlled to move downward, so that the slider 805 presses down on the push block 806 again, and the spear teeth 5 are retracted into the mounting groove 4 for easy transport of the retrieval spear.

[0023] The mounting slot 4 is internally connected to a mounting shaft 401, and the spear teeth 5 have an internal movable hole 501 located inside the mounting shaft 401.

[0024] In use, the spear teeth 5 can be installed inside the mounting groove 4 by the cooperation of the mounting shaft 401 and the movable hole 501, without affecting the rotation of the spear teeth 5.

[0025] The inner wall of the mounting groove 4 has a first mounting hole 402, the inside of the spear tooth 5 has a second mounting hole 502, and the spring 6 is installed between the first mounting hole 402 and the second mounting hole 502.

[0026] In use, the 60 spiral groove 3 can be installed between the spear tooth 5 and the mounting groove 4 through the first mounting hole 402 and the second mounting hole 502, which can push the spear tooth 5 to move outward.

[0027] The pointed end 7 has an internal movable groove 802, and the bottom of the sliding rod 801 is fixedly connected to a movable block 803, which is movably installed inside the movable groove 802.

[0028] When it is necessary to control the sliding rod 801 to move up and down, rotate the tip 7. Through the thread between the tip 7 and the spear rod 2, the tip 7 can move up and down. At the same time, through the cooperation of the movable groove 802 and the movable block 803, the sliding rod 801 can move up and down together with the tip 7.

[0029] A limiting groove 201 is provided at the bottom of the spear shaft 2, and a limiting block 701 is fixedly connected to the top of the tip 7. The limiting block 701 is slidably installed inside the limiting groove 201.

[0030] During use, the distance the tip 7 moves up and down is displayed by the cooperation of the limiting groove 201 and the limiting block 701, preventing the tip 7 from falling off.

[0031] The outer surface of the spear shaft 2 is provided with a spiral groove 3.

[0032] As the drill pipe drives the retrieval spear to rotate and move, the spiral groove 3 allows the retrieval spear to move downwards more effectively.

[0033] Working principle: When it is necessary to retrieve fish that have fallen into the oil well by rope, the upper connector 1 is installed on the drill pipe, and then the tip 7 is rotated. Through the thread between the tip 7 and the spear rod 2, the tip 7 can be moved downward. At the same time, through the cooperation of the movable groove 802 and the movable block 803, the sliding rod 801 can be moved downward along with the tip 7. At this time, the slider 805 is no longer located at the top of the push block 806 and no longer presses against the spear teeth 5. Then, the spring 6 pushes the spear teeth 5 outward. Then, the retrieval spear is sent into the oil well through the drill pipe, and the fish that have fallen into the oil well by rope can be hooked by the spear teeth 5.

[0034] After use, control the sliding rod 801 to move downwards, so that the slider 805 presses down on the push block 806 again, and retracts the spear teeth 5 into the mounting slot 4, making it easier to transport the retrieval spear.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spiral fishing spear specifically designed for rope-type fish retrieval, comprising an upper connector (1), wherein a spear shaft (2) is fixedly connected to the bottom of the upper connector (1), characterized in that: The outer surface of the spear shaft (2) is provided with a mounting groove (4), and there are multiple mounting grooves (4). Spear teeth (5) are movably installed inside the mounting groove (4). A spring (6) is fixedly installed between the mounting groove (4) and the spear teeth (5). A pointed tip (7) is threaded on the bottom of the spear shaft (2). A locking component (8) is installed inside the spear shaft (2). The locking assembly (8) includes a sliding rod (801), which is slidably installed inside the spear rod (2). The mounting groove (4) has a groove (804) on one side near the sliding rod (801). A slider (805) is fixedly connected to the outer surface of the sliding rod (801). There are multiple sliders (805). A push block (806) is fixedly connected to the outer surface of the spear tooth (5) near the sliding rod (801). Both the slider (805) and the push block (806) are located inside the groove (804), and the slider (805) is located above the push block (806).

2. The spiral retrieval spear for rope-type fish-catching as described in claim 1, characterized in that: The mounting groove (4) is movably connected to the mounting shaft (401), and the spear tooth (5) has a movable hole (501) inside, which is located inside the mounting shaft (401).

3. The spiral retrieval spear for rope-type fish-catching as described in claim 1, characterized in that: The inner wall of the mounting groove (4) is provided with a first mounting hole (402), and the inside of the spear tooth (5) is provided with a second mounting hole (502). The spring (6) is installed between the first mounting hole (402) and the second mounting hole (502).

4. The spiral retrieval spear for rope-type fish-catching as described in claim 1, characterized in that: The tip (7) has an open groove (802) inside, and the bottom of the sliding rod (801) is fixedly connected to a movable block (803), which is movably installed inside the groove (802).

5. The spiral retrieval spear for rope-type fish-catching as described in claim 1, characterized in that: The bottom of the spear shaft (2) has a limiting groove (201), and the top of the tip (7) is fixedly connected to a limiting block (701). The limiting block (701) is slidably installed inside the limiting groove (201).

6. The spiral retrieval spear for rope-type fish-catching as described in claim 1, characterized in that: The outer surface of the spear shaft (2) is provided with a spiral groove (3).

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