Retractable fishing tap

Abstract

The utility model discloses a returnable fishing tap, which belongs to the technical field of drilling tools, aims at solving the problems that when a severely corroded fish is fished, the pressure or the rotating speed is difficult to reduce in time, the fish is easy to crack and the fishing fails, and comprises a sleeve shell, a piston is arranged at the inner bottom of the sleeve shell, and a second mounting plate is fixed on the bottom surface of the piston; a side hole is formed in the bottom of the inner side wall of the sleeve shell, and a pressure sensor is fixed to one side face of the inner side wall of the side hole. According to the utility model, the side hole can be blocked by the arc-shaped plate, so that the connecting ball cannot be pushed when the tap is not in contact with a fish, and whether the tap is in contact with the fish can be detected through the connecting ball, the moving column, the spring, the pressing plate and the pressure sensor, so that the pressure and the rotating speed of the tap on the fish can be conveniently reduced in time; and the condition that the fish is broken when the severely corroded fish is salvaged is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drilling tools, and particularly relates to a retrievable fishing male cone. BACKGROUND

[0002] The fishing male cone is mainly used for fishing the fallen fish such as drill pipes and oil pipes with inner holes. It is usually made of high-strength alloy steel and has good wear resistance, toughness and strength, so it can adapt to complex downhole conditions. In terms of structure, the fishing male cone is generally composed of a joint, a guide cone and a fishing thread. The joint is used for connecting with the upper tool such as a drill pipe, so as to lower the fishing male cone into the well. The guide cone is located at the front end of the male cone, and its shape is designed to facilitate the smooth insertion of the male cone into the inner hole of the fallen fish, thereby playing a role of centering and guiding. The fishing thread is a key component of the fishing male cone, and it has a special tooth shape and pitch, so there are multiple sizes and models to choose from according to different specifications of the fallen fish. In operation, the fishing male cone is lowered into the well through the drill pipe, and when the male cone approaches the fallen fish, the guide cone will make the male cone accurately enter the inner hole of the fallen fish. With the continuous lowering and rotation of the drilling tool, the fishing thread of the fishing male cone will gradually come into contact with the inner hole wall of the fallen fish and produce extrusion and cutting effect, thereby "making a buckle" on the inner hole wall of the fallen fish, so that the male cone and the fallen fish are firmly connected together. Then, by lifting the drill pipe, the fallen fish can be fished out of the well.

[0003] The existing retrievable fishing male cone is difficult to accurately determine when to be placed in place during use, and for the fallen fish with serious corrosion, if the pressure or rotation speed cannot be reduced in time when the male cone makes a buckle, the fallen fish is prone to breakage and fishing failure.

[0004] Therefore, there is a need for a retrievable fishing male cone to solve the problem of the prior art that it is difficult to reduce the pressure or rotation speed in time when fishing the fallen fish with serious corrosion, which is prone to cause the fallen fish to break and fail to fish. TECHNICAL SOLUTION

[0005] The utility model aims at providing a retrievable fishing male cone to solve the problem raised in the background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a retrievable fishing male cone, comprising a sleeve shell, a piston is arranged at the bottom of the sleeve shell, a second mounting plate is fixed to the bottom surface of the piston, a male cone is fixed to the bottom surface of the second mounting plate, a side hole is formed in the bottom of the inner side wall of the sleeve shell, a pressure sensor is fixed to one side of the inner side wall of the side hole, a limiting plate is fixed to the position close to the middle of the side hole, a moving column is movably connected to one side of the limiting plate, a connecting ball is fixed to one end of the moving column, and a pressure applying plate is fixed to the other end of the moving column.

[0007] It needs to be explained in the scheme that the mobile column is provided with a spring in the periphery, one end of the spring is fixed with one side of the limiting plate, and the other end of the spring is fixed with the outer wall of the connecting ball.

[0008] It is further worth mentioning that the first mounting plate is fixed on the inner side wall of the sleeve shell near the bottom position.

[0009] It is further worth mentioning that the first mounting plate is fixed on the inner side wall of the sleeve shell near the bottom position.

[0010] As a preferred embodiment, one of the L-shaped rods is fixed with a connecting rod near one side of the connecting ball, one end of the connecting rod is fixed with an arc-shaped plate, and the arc-shaped plate cooperates with the side hole.

[0011] Compared with the prior art, the present application provides a kind of can be retired fishing public cone, at least including the following beneficial effects:

[0012] Through the piston, the cavity can be formed between the connecting plate and the first mounting plate, so that the air in the cavity enters the side hole to push the connecting ball to move, and the arc-shaped plate is arranged to block the side hole, so that the connecting ball is not pushed when the public cone is not in contact with the fish, and the connecting ball, the mobile column, the spring, the pressing plate and the pressure sensor are arranged to detect whether the public cone is in contact with the fish, so that the pressure and the rotating speed of the public cone on the fish can be reduced in time, and the fish is prevented from being broken when fishing the fish with serious corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the sleeve shell of the utility model;

[0015] Figure 3 It is a schematic diagram of the sleeve shell of the utility model; Figure 2 It is a schematic diagram of the local enlarged structure of A in the utility model.

[0016] In the figure:

[0017] 100, sleeve shell; 101, first mounting plate; 102, piston; 103, public cone; 104, connecting plate; 105, second mounting plate;

[0018] 200, side hole; 201, connecting ball; 202, mobile column; 203, spring; 204, limiting plate; 205, pressing plate; 206, pressure sensor;

[0019] 300, L-shaped rod; 301, limiting groove;

[0020] 400, connecting rod; 401, arc-shaped plate. DETAILED DESCRIPTION

[0021] Please refer to Figures 1-3 The utility model provides a kind of salvageable fishing public cone, including shell 100, the bottom of the shell 100 is provided with piston 102, the bottom of the piston 102 is fixed with second mounting plate 105, the bottom of the second mounting plate 105 is fixed with public cone 103, the bottom of the inside wall of the shell 100 is opened with side hole 200, the side of the inside wall of the side hole 200 is fixed with pressure sensor 206, the position close to the middle of the side hole 200 is fixed with limit plate 204, the side of the limit plate 204 is movably connected with moving column 202, one end of the moving column 202 is fixed with connecting ball 201, the other end of the moving column 202 is fixed with pressing plate 205.

[0022] Further as Figure 2 The periphery of the moving column 202 is provided with spring 203, one end of the spring 203 is fixed with the side of the limit plate 204, and the other end of the spring 203 is fixed with the outside wall of the connecting ball 201.

[0023] By setting spring 203, after connecting ball 201 is pushed by air, spring 203 can be compressed, so that after the fish is fished up, compressed spring 203 can push connecting ball 201 to reset, to prepare for the next detection.

[0024] The present scheme has the following working process: when the fallen fish is fished, first, the telescopic mechanism and the rotating mechanism on the top surface of the sleeve shell 100 are started, the telescopic mechanism drives the sleeve shell 100 to move downward, and the rotating mechanism drives the sleeve shell 100 to rotate, in this process, the sleeve shell 100 rotates while moving downward, when the male tap 103 contacts the fallen fish, the male tap 103 processes the fallen fish surface to form a buckle, at the same time, the sleeve shell 100 continues to move downward, so that the air between the first mounting plate 101 and the connecting plate 104 is compressed, in this process, the arc-shaped plate 401 is driven to move upward, so that the side hole 200 is opened, the compressed air enters the side hole 200 and pushes the connecting ball 201 to move, the movement of the connecting ball 201 drives the movement of the moving column 202, the movement of the moving column 202 drives the movement of the pressing plate 205, so that the pressing plate 205 contacts and presses the pressure sensor 206, in this process, the spring 203 is compressed, the pressure sensor 206 transmits a signal to the external PLC controller, the PLC controller controls the telescopic mechanism to slow down the telescopic speed, that is, the drilling pressure of the male tap 103 on the fallen fish is reduced, at the same time, the PLC controller controls the rotating mechanism to slow down the rotating speed, so that the rotating speed of the male tap 103 is reduced, after a certain pressure and rotating speed are applied to the fallen fish, the male tap 103 stops moving. Then the telescopic mechanism is reversely started, so that the sleeve shell 100 is driven to move upward and is removed from the corresponding position, in this process, the male tap 103 returns to the initial position in the sleeve shell 100, the side hole 200 is blocked by the arc-shaped plate 401, and the spring 203 pushes the connecting ball 201 to reset, preparing for the next fishing of the fallen fish.

[0025] According to the above working process, the piston 102 is arranged, so that the cavity can be formed between the connecting plate 104 and the first mounting plate 101, and then the air in the cavity can enter the side hole 200 to push the connecting ball 201 to move, the arc-shaped plate 401 is arranged, so that the side hole 200 can be blocked by the arc-shaped plate 401, so that the connecting ball 201 is not pushed when the male tap 103 does not contact the fallen fish, the connecting ball 201, the moving column 202, the spring 203, the pressing plate 205 and the pressure sensor 206 are arranged, so that whether the male tap 103 contacts the fallen fish can be detected, and then the pressure and rotating speed of the male tap 103 on the fallen fish can be reduced in time, so that the situation that the fallen fish is broken when the fallen fish is fished is avoided.

[0026] Further as shown in Figure 2 The first mounting plate 101 is fixed to the inner side wall of the sleeve shell 100 near the bottom position.

[0027] The first mounting plate 101 is arranged, so that the cavity can be formed between the connecting plate 104 and the first mounting plate 101, and then the air in the cavity can be stored.

[0028] Further as shown in Figure 3As shown, the top surface of the piston 102 is fixed with a connecting plate 104, the top surface of the connecting plate 104 is fixed with four L-shaped rods 300 near the edge position in a circumferential distribution, the inner side wall of the sleeve 100 is provided with four limiting grooves 301 near the bottom position in a circumferential distribution, and the top of the L-shaped rod 300 is movably clamped with the corresponding limiting groove 301.

[0029] The first L-shaped rod 300 and the limiting groove 301 are arranged, so that the position of the piston 102 can be limited.

[0030] Further as shown, Figure 3 One of the L-shaped rods 300 is fixed with a connecting rod 400 near one side of the connecting ball 201, one end of the connecting rod 400 is fixed with an arc-shaped plate 401, and the arc-shaped plate 401 is matched with the side hole 200.

[0031] The arc-shaped plate 401 is arranged, so that the side hole 200 can be blocked, and then the arc-shaped plate 401 can be moved up after the male taper 103 contacts the fish, so that the side hole 200 is opened. In this process, the air between the first mounting plate 101 and the connecting plate 104 can be compressed, so as to push the connecting ball 201 to move, so that the pressing plate 205 contacts the pressure sensor 206, the pressure sensor 206 transmits the pressure signal to the external PLC controller, so that the rotation speed and the drilling pressure of the male taper 103 can be adjusted.

[0032] In summary: when the fish is fished, first, the telescopic mechanism and the rotating mechanism on the top surface of the sleeve shell 100 are started, the telescopic mechanism drives the sleeve shell 100 to move downward, and the rotating mechanism drives the sleeve shell 100 to rotate, in this process, the sleeve shell 100 rotates while moving downward, when the male tap 103 contacts the fish, the male tap 103 processes the fish surface to make a buckle, at the same time, the sleeve shell 100 continues to move downward, so that the air between the first mounting plate 101 and the connecting plate 104 is compressed, in this process, the arc-shaped plate 401 is driven to move upward, so that the side hole 200 is opened, the compressed air enters the side hole 200 and pushes the connecting ball 201 to move, the movement of the connecting ball 201 drives the movement of the moving column 202, the movement of the moving column 202 drives the movement of the pressing plate 205, so that the pressing plate 205 contacts and presses the pressure sensor 206, in this process, the spring 203 is compressed, the pressure sensor 206 transmits a signal to the external PLC controller, the PLC controller controls the telescopic speed of the telescopic mechanism to slow down, that is, the drilling pressure of the male tap 103 on the fish is reduced, at the same time, the PLC controller controls the rotating speed of the rotating mechanism to slow down, so that the rotating speed of the male tap 103 is reduced, after a certain pressure and rotating speed are applied to the fish, the male tap 103 stops moving. Then the telescopic mechanism is reversely started, so that the sleeve shell 100 is driven to move upward and is removed from the corresponding position, in this process, the male tap 103 returns to the initial position in the sleeve shell 100, the side hole 200 is blocked by the arc-shaped plate 401, and the spring 203 pushes the connecting ball 201 to reset, so as to prepare for the next fishing of the fish.

[0033] The telescopic mechanism and the rotating mechanism are respectively arranged on the top surface of the sleeve shell 100.

[0034] The pressure sensor 206 and the servo motor can be purchased in the market, and in the field, it is a mature technology and has been fully disclosed, so the description is not repeated.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fishing pin, comprising a sleeve (100), characterized in that, The bottom of the sleeve shell (100) is provided with a piston (102), the bottom surface of the piston (102) is fixedly provided with a second mounting plate (105), the bottom surface of the second mounting plate (105) is fixedly provided with a male taper (103), the inner side wall of the sleeve shell (100) is provided with a side hole (200) at the bottom, the inner side wall of the side hole (200) is fixedly provided with a pressure sensor (206) on one side, the inner side wall of the side hole (200) is fixedly provided with a limiting plate (204) near the middle position, the limiting plate (204) is movably connected with a moving column (202) on one side, one end of the moving column (202) is fixedly provided with a connecting ball (201), the other end of the moving column (202) is fixedly provided with a pressing plate (205).

2. A fishing tap according to claim 1, wherein: The moving column (202) is provided with a spring (203) on the periphery, one end of the spring (203) is fixedly connected with one side of the limiting plate (204), and the other end of the spring (203) is fixedly connected with the outer side wall of the connecting ball (201).

3. A fishing tap according to claim 1, wherein: The inner side wall of the sleeve shell (100) is fixedly provided with a first mounting plate (101) near the bottom.

4. The fishing tap of claim 1 wherein: The top surface of the piston (102) is fixedly provided with a connecting plate (104), the top surface of the connecting plate (104) is fixedly provided with four L-shaped rods (300) which are circumferentially distributed near the edge position, the inner side wall of the sleeve shell (100) is provided with four limiting grooves (301) which are circumferentially distributed near the bottom, and the top of the L-shaped rod (300) is movably clamped with the corresponding limiting groove (301) on one end.

5. A fishing tap as claimed in claim 4, wherein: One of the L-shaped rods (300) is fixedly provided with a connecting rod (400) on one side near the connecting ball (201), one end of the connecting rod (400) is fixedly provided with an arc-shaped plate (401), and the arc-shaped plate (401) is matched with the side hole (200).

Images