Electric lower catcher

Abstract

The utility model discloses an electric lower catcher which comprises a body, a shifting fork used for clamping or releasing a tool is installed in the body, an electric actuator is installed on one side of the body, and the electric actuator is connected with the shifting fork through a transmission component. The opening and closing shifting fork is arranged in the body to control the channel switch of the body, so that the process of blocking the drift diameter of the blowout preventer or opening the drift diameter of the blowout preventer is completed, a tool is prevented from falling into a well or normally falling into the well, the device only needs to be connected with a power line, components such as a hydraulic system and a pipeline of a traditional hydraulic lower catcher are omitted, and operation is convenient. The system is simple in configuration, low in cost and simple in personnel operation, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cable blowout prevention devices, and in particular to an electric lower catcher. Background Technology

[0002] In wireline logging and perforation operations, a lower catcher is installed at the top of the wellhead tree to prevent the tool from falling into the well if the cable is accidentally pulled apart while the tool is inside the blowout preventer.

[0003] Conventional traps are generally manual or hydraulic. Opening them requires personnel to climb to the wellhead to open them manually, or to install a hydraulic cylinder, connect hydraulic lines, and then open them using a hydraulic system. Their structure and operation are complex, and hydraulic systems pose safety and environmental risks due to multiple pipelines and high-pressure hydraulic oil leaks. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies, the purpose of this utility model is to provide an electric lower catcher.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An electric lower catcher includes: a body, wherein a fork for switching a vertical flow path is installed inside the body, and an electric actuator is installed on one side of the body, the electric actuator being connected to the fork via a rotating shaft.

[0007] The electric actuator includes a motor, which is fixedly mounted on the side wall of the body via a mounting bracket.

[0008] The motor output end is equipped with a drive shaft, which is connected to a rotating shaft. The drive shaft passes through the body and enters the inner cavity. The end of the rotating shaft passes through the outer wall of the body, and a rotation recovery component is installed at the protruding end of the rotating shaft.

[0009] The rotational recovery component includes a threaded sleeve installed at the protruding end of the rotating shaft, a torsion spring installed outside the threaded sleeve, and a torsion bar installed on one side of the threaded sleeve.

[0010] The drive shaft and the rotating shaft are connected by a stepped engagement, and a clearance groove is provided at the connection between the drive shaft and the rotating shaft. The end of the shift fork is installed in the clearance groove.

[0011] The gap groove is a 90-degree gap groove.

[0012] The motor is a DC explosion-proof motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model provides an electric downhole catcher. By setting an openable and closable fork inside the main body to control the channel switch of the main body, it can complete the process of blocking or opening the flow path of the blowout preventer, thereby preventing the tool from falling into the well or allowing the tool to be lowered into the well normally. The structure of this utility model only requires a power cord to be connected. It does not have the hydraulic system, pipelines and other components of traditional hydraulic downhole catchers. Its system configuration is simple, the cost is low and the operation is simple, thus improving safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the electric lower catcher of this utility model;

[0016] Figure 2 This is a cross-sectional view of the electric lower catcher of this utility model;

[0017] Figure 3 This is a schematic diagram of the transmission component structure of this utility model.

[0018] In the diagram, 1—body; 2—electric actuator; 3—union; 4—shift fork; 5—rotation recovery component; 21—motor; 22—mounting bracket; 23—drive shaft; 24—rotating shaft; 25—clearance groove; 51—screw sleeve; 52—torsion spring; 53—torsion bar. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0020] like Figure 1-3 As shown, this utility model provides an electric lower catcher, comprising: a body 1, wherein a fork 4 for switching a vertical flow path is installed inside the body 1, and an electric actuator 2 is installed on one side of the body 1, the electric actuator 2 being connected to the fork 4 via a rotating shaft 24. A union 3 is installed on the body 1.

[0021] Furthermore, the electric actuator 2 includes a motor 21, which is fixedly mounted on the side wall of the body 1 via a mounting bracket 22.

[0022] The output end of the motor 21 is equipped with a drive shaft 23, which is connected to a rotating shaft 24. The drive shaft 23 passes through the body 1 and enters the inner cavity. The end of the rotating shaft 24 passes through the outer wall of the body 1, and a rotation recovery component 5 is installed at the protruding end of the rotating shaft 24.

[0023] The rotation recovery component 5 includes a threaded sleeve 51 installed at the extended end of the rotating shaft 24, a torsion spring 52 installed on the outside of the threaded sleeve 51, and a torsion bar 53 installed on one side of the threaded sleeve 51.

[0024] In this invention, the drive shaft 23 and the rotating shaft 24 are connected by a stepped engagement. A clearance groove 25 is provided at the connection between the drive shaft 23 and the rotating shaft 24, and the end of the shift fork 4 is installed in the clearance groove 25. For example, the clearance groove 25 is a 90-degree clearance groove, allowing rotation of 90 degrees to enable the shift fork 4 to rotate vertically and horizontally within the body 1. The shift fork 4 and the rotating shaft 24 are connected by a stepped engagement. The motor 4 drives the drive shaft 23, causing the rotating shaft 24, which engages with the stepped plane of the drive shaft 23, to rotate. Due to the 90-degree clearance groove, during the tool lifting process, the shift fork 4 is opened, causing the rotating shaft 24 to rotate 90 degrees. At this time, the motor 21 and the rotating shaft 24 do not need to rotate, so the clearance ensures that the rotating shaft and the motor drive shaft do not interfere with each other. When it is necessary to lower the tool into the well, the motor drive shaft is rotated 90 degrees to open, and then rotated 90 degrees in the opposite direction to reset using a torsion spring.

[0025] The working process of this utility model is as follows:

[0026] The electric lowering catcher uses an electric actuator to open the fork 4, and the torsion spring 52 resets the fork 4. The fork 4 is built into the body 1 and connected by a rotating shaft 24, which can rotate 90 degrees. In the normal state, it is horizontal and can block the flow of the blowout preventer, thus preventing the tool from falling into the well. When it is necessary to lower the tool into the well, the motor 21 drives the rotating shaft 24 to rotate 90 degrees, so that the fork 4 is in a vertical state, completely opening the flow and ensuring that the tool can be lowered into the well normally.

[0027] This utility model of electric lower capture device is composed of a main body 1, a rotating shaft 24, a reset mechanism, an electric actuator, and other components. It uses an electric actuator to drive the opening and reset assembly. Its structure is simple and only requires a power cord. It does not have the hydraulic system, pipelines, and other components of traditional hydraulic lower capture devices. Its system configuration is simple, its cost is low, and its operation is simple, which improves safety.

[0028] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. An electric lower catcher, characterized in that, include: The body (1) has a fork (4) installed inside it for switching the vertical flow path. An electric actuator (2) is installed on one side of the body (1) and is connected to the fork (4) via a rotating shaft (24).

2. The electric lower catcher according to claim 1, characterized in that, The electric actuator (2) includes a motor (21), which is fixedly mounted on the side wall of the body (1) by a mounting bracket (22).

3. The electric lower catcher according to claim 2, characterized in that, The output end of the motor (21) is equipped with a drive shaft (23), which is connected to the rotating shaft (24). The drive shaft (23) passes through the body (1) and enters the inner cavity. The end of the rotating shaft (24) passes through the outer wall of the body (1). The extended end of the rotating shaft (24) is equipped with a rotation recovery component (5).

4. The electric lower catcher according to claim 3, characterized in that, The rotation recovery component (5) includes a threaded sleeve (51) installed at the extended end of the rotating shaft (24), a torsion spring (52) is installed on the outside of the threaded sleeve (51), and a torsion bar (53) is installed on one side of the threaded sleeve (51).

5. The electric lower catcher according to claim 3, characterized in that, The drive shaft (23) and the rotating shaft (24) are connected by a step fit. A gap groove (25) is provided at the connection between the drive shaft (23) and the rotating shaft (24). The end of the shift fork (4) is installed in the gap groove (25).

6. The electric lower catcher according to claim 5, characterized in that, The gap groove (25) is a 90-degree gap groove.

7. The electric lower catcher according to claim 2, characterized in that, The motor (21) is a DC explosion-proof motor.

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