Underground fisher with length adjusting function

Abstract

The utility model discloses an underground fisher with a length adjusting function. The underground fisher comprises a protection plate used for installation and a first transmission rod fixedly installed in the middle of the protection plate. The device further comprises a first motor, the upper end of the first transmission rod is fixedly connected with the output end of the first motor, a first gear and a second gear are arranged on the outer side of the first transmission rod, the second gear is located at the lower end of the first gear, the front side of the first gear is connected with a first rack, and the rear end of the first gear is connected with a second rack. The left side of the second gear is connected with a third rack, and the right side of the second gear is connected with a fourth rack; and the take-up device is arranged at the lower end of the protection plate, and a second motor is installed at the rear end of the take-up device. According to the underground fisher with the length adjusting function, the length of the supporting frame can be conveniently adjusted according to the size of a wellhead, the length of the fishing device can be conveniently adjusted according to the fishing depth of a well, and objects in the well can be conveniently and comprehensively fished.

Description

Technical Field

[0001] The utility model relates to the technical field of downhole salvage devices, in particular to a downhole salvage device with a length adjustment function. Background Art

[0002] Oil wells are holes drilled according to the well layout system of the oil field development plan to extract oil. They are channels for oil to rise from the bottom of the well to the wellhead. Oil wells are holes drilled by drilling methods. Generally, after the oil well reaches the oil layer, the oil layer casing is lowered, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas and water layers. Later, the oil layer is opened with a perforating gun according to the requirements of oil field development to form a channel. Oil well salvage mainly focuses on the salvage of cables, wire ropes and drill pipes that have fallen into the oil well. Special salvage devices are required for salvaging underground in the oil well.

[0003] The announcement number CN 209724271 U provides an oil well salvage device with an adjustable salvage function, including a fixed seat, a salvage rod fixedly connected to the bottom of the fixed seat, a connecting block fixedly connected to the bottom of the salvage rod, a salvage net fixedly connected to the top of the connecting block, a slide groove is provided on the inner side of the salvage rod, a pressure plate is movably connected to the inside of the slide groove, the pressure plate is movably connected to the top of the connecting block, a spring cylinder is fixedly connected to the bottom of the fixed seat, and a movable rod is movably connected to the inside of the spring cylinder. The oil well salvage device with an adjustable salvage function can be provided with an adjustable function by setting a threaded rod, a slider and a fixed seat, and the threaded rod is used to adjust the inside of the threaded sleeve to adjust the length of the salvage device, and the threaded cylinder and the adjustment cylinder are hinged to each other to adjust the salvage angle, making it more convenient for workers to use.

[0004] The above-mentioned prior art solutions have the following defects: it is not convenient to adjust the length of the support frame according to the size of the wellhead, it is not convenient to adjust the length of the salvage device according to the salvage depth of the well, and it is not convenient to fully salvage objects in the well. Therefore, the utility model provides a downhole salvage device with a length adjustment function to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the utility model is to provide a downhole salvage device with a length adjustment function to solve the problems in the above-mentioned background technology that it is inconvenient to adjust the length of the support frame according to the size of the wellhead, it is inconvenient to adjust the length of the salvage device according to the salvage depth of the well, and it is inconvenient to fully salvage objects in the well.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A downhole fishing device with a length adjustment function, comprising: a protective plate for installation, a first transmission rod fixedly installed in the middle of the protective plate;

[0007] It also includes: a first motor, the upper end of the first transmission rod is fixedly connected to the output end of the first motor, and a first gear and a second gear are arranged on the outer side of the first transmission rod, and the second gear is located at the lower end of the first gear, a first rack is connected to the front side of the first gear, and a second rack is connected to the rear end of the first gear, a third rack is connected to the left side of the second gear, and a fourth rack is connected to the right side of the second gear;

[0008] A wire take-up device is arranged at the lower end of the protective plate, a second motor is installed at the rear end of the wire take-up device, a wire is connected to the outer side of the wire take-up device, and a protective shell is installed at the lower end of the wire, a first gear is installed in the middle of the lower end of the protective shell, and a threaded rod is arranged inside the third gear, a fourth gear is connected to the right side of the third gear, a second transmission rod is installed inside the fourth gear, and a third motor is installed at the upper end of the second transmission rod, a connecting block is fixed to the lower end of the threaded rod, and the lower end of the wire take-up device is connected to the first connecting rod and the second connecting rod, and the second connecting rod is located at the rear end of the first connecting rod, and wires are installed at the lower ends of the first connecting rod and the second connecting rod.

[0009] Preferably, the front side of the first gear is connected to the first rack in a meshing manner, and the rear side of the first gear is connected to the second rack in a meshing manner.

[0010] Preferably, the left side of the second gear is connected to the third rack in a meshing manner, and the right side of the second gear is connected to the fourth rack in a meshing manner.

[0011] Preferably, columns are provided on the outer sides of the first rack, the second rack, the third rack and the fourth rack, and telescopic rods are installed at the lower ends of the columns.

[0012] Preferably, the interior of the third gear is connected to the threaded rod in a threaded manner, and the right side of the third gear is connected to the fourth gear in a meshing manner.

[0013] Preferably, the first connecting rod and the second connecting rod form a rotating structure at the lower end of the protective shell, and the upper ends of the first connecting rod and the second connecting rod are provided with sliding grooves, and the connecting block forms a sliding structure in the sliding grooves.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the downhole fishing device with length adjustment function is convenient for adjusting the length of the support frame according to the size of the wellhead, convenient for adjusting the length of the fishing device according to the fishing depth of the well, and convenient for comprehensive fishing of objects in the well;

[0015] 1. A first gear, a second rack and a column are provided. Since the oil wells to be mined are of different sizes, the first motor is started to drive the first transmission rod to rotate, and the rotation of the first transmission rod drives the first gear and the second gear to rotate, so that the first gear and the second gear respectively drive the first rack, the second rack, the third rack and the fourth rack to be pulled out from the inside of the protective plate, thereby driving the column and the telescopic rod to move to the specified position for support, so as to facilitate the adjustment of the length of the support frame according to the size of the wellhead;

[0016] 2. A wire take-up device, a second motor and a wire are provided. When the protective plate drives the salvage device to correspond to the wellhead, the second motor is started to drive the wire take-up device to rotate, and the wire take-up device drives the wire to extend downward when rotating, so that the wire drives the protective shell downward to the inside of the wellhead when moving, so as to facilitate the adjustment of the length of the salvage device according to the salvage depth of the well;

[0017] 3. A first gear, a threaded rod and a salvage net are provided. When the protective shell drives the salvage net into the oil well, the third motor is started to drive the second gear to rotate through the second transmission rod, and the second gear drives the first gear to rotate when rotating, and the first gear drives the threaded rod to move downward when rotating, and the movement of the threaded rod drives the connecting block to slide in the upper end grooves of the first connecting rod and the second connecting rod, thereby driving the salvage net to flip upward and unfold through the first connecting rod and the second connecting rod, so that when the protective shell moves upward, it is salvaged by the salvage net, which is convenient for comprehensive salvage of objects in the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the side cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model from top view;

[0021] Figure 4 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0022] Figure 5 For this utility model Figure 1 Enlarged structural diagram at B in the middle.

[0023] In the figure: 1. protective plate; 2. first transmission rod; 3. first motor; 4. first gear; 5. second gear; 6. first rack; 7. second rack; 8. third rack; 9. fourth rack; 10. column; 11. telescopic rod; 12. wire take-up device; 13. second motor; 14. wire; 15. protective shell; 16. third gear; 17. threaded rod; 18. fourth gear; 19. second transmission rod; 20. third motor; 21. connecting block; 22. first connecting rod; 23. second connecting rod; 24. salvage net. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: a downhole salvage device with a length adjustment function, comprising a protective plate 1, a first transmission rod 2, a first motor 3, a first gear 4, a second gear 5, a first rack 6, a second rack 7, a third rack 8, a fourth rack 9, a column 10, a telescopic rod 11, a wire take-up device 12, a second motor 13, a wire 14, a protective shell 15, a third gear 16, a threaded rod 17, a fourth gear 18, a second transmission rod 19, a third motor 20, a connecting block 21, a first connecting rod 22, a second connecting rod 23 and a salvage net 24.

[0026] Working principle: When using the downhole fishing device with length adjustment function, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the upper end of the first transmission rod 2 is fixedly connected to the output end of the first motor 3, and the first gear 4 and the second gear 5 are arranged on the outer side of the first transmission rod 2, and the second gear 5 is located at the lower end of the first gear 4, the front side of the first gear 4 is connected to the first rack 6, and the rear end of the first gear 4 is connected to the second rack 7, the left side of the second gear 5 is connected to the third rack 8, and the right side of the second gear 5 is connected to the fourth rack 9. The support range of the salvage device is adjusted according to the size of the salvage wellhead required. First, the first motor 3 is started to drive the first gear 4 and the second gear 5 to rotate through the first transmission rod 2. Since the first gear 4 and the second gear 5 are respectively connected to the first rack 6, the second rack 7, the third rack 8 and the fourth rack 9 in a meshing manner, the first gear 4 and the second gear 5 rotate to drive the first rack 6, the second rack 7, the third rack 8 and the fourth rack 9 to slide out from the inside of the protective plate 1, and drive the column 10 and the telescopic rod 11 to move to a suitable position for support, and then the telescopic rod 11 is started to drive the protective plate 1 to move upward as a whole through the column 10, so as to adjust the equipment state before salvage;

[0027] When the object is being salvaged, a second motor 13 is installed at the rear end of the wire take-up device 12, and a wire 14 is connected to the outside of the wire take-up device 12, and a protective shell 15 is installed at the lower end of the wire 14, a third gear 16 is installed in the middle of the lower end of the protective shell 15, and a threaded rod 17 is arranged inside the third gear 16, a fourth gear 18 is connected to the right side of the third gear 16, and a second transmission rod 19 is installed inside the fourth gear 18, and a third motor 20 is installed at the upper end of the second transmission rod 19, a connecting block 21 is fixed at the lower end of the threaded rod 17, and a first connecting rod 22 and a second connecting rod 23 are connected to the lower end of the wire take-up device 12, and the second connecting rod 23 is located at the rear end of the first connecting rod 22, and the lower ends of the first connecting rod 22 and the second connecting rod 23 are installed with the wire 14, when the position of the supporting device is adjusted, the second motor 13 is started to drive the wire take-up device 12 to rotate, and when the wire take-up device 12 rotates, it is driven by the wire 14 The protective shell 15 is extended into the well. After the protective shell 15 drives the salvage net 24 to enter the liquid, the third motor 20 is started to drive the fourth gear 18 to rotate through the second transmission rod 19. Since the fourth gear 18 is connected to the third gear 16 in a meshing manner, the rotation of the fourth gear 18 drives the third gear 16 to rotate, and the third gear 16 is connected to the threaded rod 17 in a threaded manner, so the threaded rod 17 is extended and retracted downward according to the rotation of the third gear 16. The movement of the threaded rod 17 drives the connecting block 21 to slide in the upper end groove of the first connecting rod 22 and the second connecting rod 23, and at the same time drives the first connecting rod 22 and the second connecting rod 23 to flip upward. The flipping of the first connecting rod 22 and the second connecting rod 23 drives the salvage net 24 to unfold. When the protective shell 15 is lifted upward, the salvage net 24 is driven to salvage and filter the debris in the oil. This is the use method of the downhole salvage device with length adjustment function.

[0028] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or 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 shall be included in the protection scope of the present invention.

Claims

1. A downhole fishing device with length adjustment function, comprising: A protective plate (1) for installation, and a first transmission rod (2) fixedly mounted in the middle of the protective plate (1); It is characterized by further comprising: A first motor (3), the upper end of the first transmission rod (2) is fixedly connected to the output end of the first motor (3), and a first gear (4) and a second gear (5) are arranged on the outer side of the first transmission rod (2), and the second gear (5) is located at the lower end of the first gear (4), the front side of the first gear (4) is connected to a first rack (6), and the rear end of the first gear (4) is connected to a second rack (7), the left side of the second gear (5) is connected to a third rack (8), and the right side of the second gear (5) is connected to a fourth rack (9); A wire take-up device (12) is arranged at the lower end of the protective plate (1), a second motor (13) is installed at the rear end of the wire take-up device (12), a wire (14) is connected to the outer side of the wire take-up device (12), a protective shell (15) is installed at the lower end of the wire (14), a third gear (16) is installed at the middle part of the lower end of the protective shell (15), a threaded rod (17) is arranged inside the third gear (16), a fourth gear (18) is connected to the right side of the third gear (16), and the fourth gear (18) is connected to the right side of the third gear (16). A second transmission rod (19) is installed inside the gear (18), and a third motor (20) is installed at the upper end of the second transmission rod (19), a connecting block (21) is fixed at the lower end of the threaded rod (17), and a first connecting rod (22) and a second connecting rod (23) are connected to the lower end of the wire take-up device (12), and the second connecting rod (23) is located at the rear end of the first connecting rod (22), and the lower ends of the first connecting rod (22) and the second connecting rod (23) are installed with wires (14).

2. The downhole fishing device with length adjustment function according to claim 1, characterized in that: The front side of the first gear (4) is connected to the first rack (6) in a meshing manner, and the rear side of the first gear (4) is connected to the second rack (7) in a meshing manner.

3. The downhole fishing device with length adjustment function according to claim 1, characterized in that: The left side of the second gear (5) is connected to the third rack (8) in a meshing manner, and the right side of the second gear (5) is connected to the fourth rack (9) in a meshing manner.

4. The downhole fishing device with length adjustment function according to claim 1, characterized in that: A column (10) is arranged on the outer side of the first rack (6), the second rack (7), the third rack (8) and the fourth rack (9), and a telescopic rod (11) is installed at the lower end of the column (10).

5. The downhole fishing device with length adjustment function according to claim 1, characterized in that: The interior of the third gear (16) is connected to the threaded rod (17) in a threaded manner, and the right side of the third gear (16) is connected to the fourth gear (18) in a meshing manner.

6. The downhole fishing device with length adjustment function according to claim 1, characterized in that: The first connecting rod (22) and the second connecting rod (23) form a rotating structure at the lower end of the protective shell (15), and the upper ends of the first connecting rod (22) and the second connecting rod (23) are provided with sliding grooves, and the connecting block (21) forms a sliding structure in the sliding grooves.

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