Explosion-proof electric well repair machine

Abstract

This utility model relates to the field of petroleum equipment technology, specifically to an explosion-proof electric workover rig. It includes a vehicle body, with an explosion-proof battery pack fixed to the upper part of the body. The explosion-proof battery pack is connected to a battery management module. A motor is fixed to one side of the vehicle body, and the motor is connected to the explosion-proof battery pack via a bidirectional frequency converter. The motor's output shaft is connected to the input end of a three-axle box via a gearbox. The three-axle box is located on the side of the gearbox and winch, and its output end is connected to the winch's input end via a coupling. The three-axle box and gearbox are fixed to the vehicle body. This utility model uses a three-axle box and coupling combined transmission system, which reduces the size compared to traditional angle transmission boxes and solves the problem of excessive vehicle body width.

Description

Technical Field

[0001] This utility model relates to the field of petroleum equipment technology, specifically to an explosion-proof electric well repair machine. Background Technology

[0002] In some existing workover rigs, the winch and drive unit are connected via chain drive. When the chain becomes slack, it is prone to loosening during power transmission, which can easily lead to chain breakage or seizing.

[0003] Some existing workover rigs are electrically driven, with the winch powered by an electric motor. During the workover process, in order to effectively utilize the potential energy of the drill pipe or tubing during descent, the winch needs to drive the output shaft of the motor to rotate. The rotation of the motor's output shaft generates electrical energy, which is stored in the battery pack. This working method has high requirements for power transmission, necessitating an upgrade of the existing workover rigs.

[0004] In some existing electric workover rigs, the motor drives the winch via a chain box connected to an angle transmission box. However, due to the large size of the angle transmission box, some kinetic energy is wasted, increasing costs, creating more potential failure points, and making installation cumbersome.

[0005] The working environment of workover rigs is harsh. The output shaft of the motor of the existing electric workover rig is directly connected to the input shaft of the angle transmission box. Due to manufacturing errors or thermal deformation during operation, there may be axial, radial or angular deviations between the output shaft of the motor and the input shaft of the angle transmission box, which will cause uneven load distribution, resulting in periodic torque fluctuations, abnormal vibration and noise. Utility Model Content

[0006] The main objective of this invention is to provide an explosion-proof electric workover rig that is compact in structure, easy to install, rationally laid out, energy-saving and consumption-reducing, and capable of converting potential energy into electrical energy when lowering tubing or drill pipe, while fully utilizing the motor's stop-and-go characteristics to replace the working brake. This explosion-proof electric workover rig is suitable for complex working environments.

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] The explosion-proof electric well workover rig includes a vehicle body, with an explosion-proof battery pack fixed to the upper part of the vehicle body. The explosion-proof battery pack is connected to a battery management module. A motor is fixed to the vehicle body on one side of the explosion-proof battery pack. The motor, the explosion-proof battery pack, a bidirectional frequency converter, and an explosion-proof electrical control box are connected. The output shaft of the motor is connected to the input end of a three-axis gearbox through a gearbox. The three-axis gearbox is located on the side of the gearbox and the winch. The output end of the three-axis gearbox is connected to the input end of the winch through a coupling. The three-axis gearbox and the gearbox are fixed to the vehicle body.

[0009] Specifically, the motor is a permanent magnet synchronous explosion-proof motor.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. The transmission system adopts a combination of a three-axle box and coupling, which reduces the volume compared to the traditional angle transmission box and solves the problem of the vehicle body being too wide.

[0012] 2. The coupling can absorb angular deviations and axial displacements between the output end of the three-axle box and the input end of the winch, enabling smooth power transmission. The staged speed change transmission of the gearbox and three-axle box reduces the torque fluctuation coefficient.

[0013] 3. It can convert the potential energy of the tubing or drill pipe into electrical energy for storage, thereby realizing the recovery of kinetic energy. When the tubing or drill pipe is lowered, the winch can effectively transmit power to the motor through the coupling, three-axis box and gearbox, which can limit the lowering speed of the tubing or drill pipe, thus replacing the working brake. At the same time, it ensures that the power can be smoothly transmitted during the process of converting potential energy into electrical energy.

[0014] 4. The motor adopts a permanent magnet synchronous explosion-proof motor. Permanent magnet synchronous explosion-proof motors have high efficiency over a wide speed range, especially under low-speed, heavy-load conditions, where efficiency is significantly improved compared to traditional asynchronous motors. When the oil pipe is lowered, the motor operates as a generator, fully utilizing its stop-and-go characteristics to replace the working brake. The permanent magnet magnetic field does not require external excitation, resulting in high energy regeneration efficiency and significantly improving the charging rate of the explosion-proof battery pack, achieving efficient closed-loop utilization of potential energy, kinetic energy, and electrical energy. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention.

[0016] The parts in the attached diagram are named as follows: 1. Vehicle body, 2. Battery pack, 3. Motor, 4. Gearbox, 5. Three-axle box, 6. Coupling, 7. Winch. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1As shown, the explosion-proof electric well workover rig includes a vehicle body 1. An explosion-proof battery pack 2 is fixed to the upper end of the vehicle body 1 and is connected to a battery management module. A motor 3, a permanent magnet synchronous explosion-proof motor, is fixed to the vehicle body 1 on one side of the explosion-proof battery pack 2. The motor 3, the explosion-proof battery pack 2, a bidirectional frequency converter, and an explosion-proof electrical control box are connected. The output shaft of the motor 3 is connected to the input end of a three-axis housing 5 through a gearbox 4. The three-axis housing 5 is located on one side of the gearbox 4 and the winch 7. The output end of the three-axis housing 5 is connected to the input end of the winch 7 through a coupling 6. The three-axis housing 5 and the gearbox 4 are fixed to the vehicle body 1.

[0019] The motor 3 and the winch 7 are connected by a three-axis box 5. The three-axis box 5 is small in size, and its installation on the car body 1 can prevent the car body 1 from being too wide.

[0020] The motor 3 is connected to the three-axle box 5 through the gearbox 4, which can output power smoothly. The three-axle box 5 is connected to the winch 7 through the coupling 6, which can eliminate the axial, radial or angular deviation between the output end of the three-axle box 5 and the input end of the winch 7 caused by the deformation of the car body 1 or the installation deviation. This can ensure that the load is evenly distributed and avoid periodic torque fluctuations, abnormal vibration and noise.

[0021] The tubing or drill pipe descends under the action of gravity, and the wire rope drives the winch 7 to rotate. The wire rope is wound off the winch 7, and the winch 7 drives the rotation of the motor 3 through the coupling 6, the three-axis box 5 and the gearbox 4. The motor 3 is a permanent magnet synchronous explosion-proof motor. The motor 3 can generate electrical energy during rotation. The electrical energy generated by the rotation of the motor 3 can charge the explosion-proof battery pack 2 through the explosion-proof electrical control box to realize kinetic energy recovery.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An explosion-proof electric workover rig, comprising a vehicle body (1), an explosion-proof battery pack (2) is fixed at the upper end of the vehicle body (1), the explosion-proof battery pack (2) is connected with a battery management module, characterized in that, A motor (3) is fixed on the vehicle body (1) on one side of the explosion-proof battery pack (2). The motor (3), the explosion-proof battery pack (2), the bidirectional frequency converter and the explosion-proof electrical control box are connected. The output shaft of the motor (3) is connected to the input end of the three-axis box (5) through the gearbox (4). The three-axis box (5) is located on the side of the gearbox (4) and the winch (7). The output end of the three-axis box (5) is connected to the input end of the winch (7) through the coupling (6). The three-axis box (5) and the gearbox (4) are fixed on the vehicle body (1).

2. The explosion-proof electric workover rig of claim 1, wherein, The motor (3) is a permanent magnet synchronous explosion-proof motor.

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