Auxiliary hoisting tool for pipeline repair

Abstract

The utility model relates to pipeline hoisting tool technical field, concretely is a kind of auxiliary hoisting tool for pipeline maintenance, including two housings, the housing is cylindrical and one end is open, the central rotation of the housing unopened one end is connected with the shaft, the shaft is located in the one end fixed connection of the housing inside limit board, the other end is fixedly connected with lifting ring, the inner surface of the housing is provided with thread, at least one the housing inside detachably connected with connecting device, the connecting device is cylindrical, a plurality of lifting rings are fixedly connected in the middle of the connecting device, the utility model reduces the damage and scratch of the thread and outer surface of pipeline when hoisting pipeline, avoids that lifting hook and rigid rope directly act on pipeline, causes the condition of damage to pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline hoisting tools, specifically an auxiliary hoisting tool for pipeline maintenance. Background Technology

[0002] Pipelines, as the most common transportation tool in the petroleum industry, are indispensable key facilities for oil extraction and long-distance oil transportation. They are divided into oil production pipelines and oil transportation pipelines. Currently, oil production pipelines are generally connected using a male and female drill pipe connection. This allows for a more stable connection when drilling deep underground, utilizing the torque of the top drive rotation to prevent the risk of loosening or opening. Oil transportation pipelines mostly use flange connections, which offer strong load-bearing capacity and good sealing performance. Currently, these pipelines are typically moved using cranes or overhead cranes during maintenance. During hoisting, either double hooks are used to hook onto both ends of the pipeline, or steel ropes are used to bind and lift the pipeline body. However, double hook hoisting can cause some damage to the inner wall of the pipeline, ranging from minor damage to the inner coating to serious scratches. Steel ropes also present the same problem, causing varying degrees of damage to the outer surface of the pipeline during binding and hoisting. Therefore, there is a need to invent an auxiliary hoisting tool to meet this requirement. Utility Model Content

[0003] To address the above technical problems, this utility model provides an auxiliary lifting tool for pipeline maintenance that is convenient for hoisting and can effectively protect the pipeline.

[0004] To solve the above-mentioned technical problems, the present invention provides an auxiliary lifting tool for pipeline maintenance, comprising two housings. The housings are cylindrical with one open end. A rotating shaft is rotatably connected to the center of the closed end of the housing. A limit plate is fixedly connected to one end of the rotating shaft inside the housing, and a lifting ring is fixedly connected to the other end. The inner surface of the housing is provided with threads. At least one connecting device is detachably connected inside the housing. The connecting device is cylindrical, and several lifting rings are fixedly connected at intervals in the middle of the connecting device.

[0005] Furthermore, the connecting device has an external threaded shaft on the left and an internal threaded shaft on the right, and the connecting device is threadedly connected to the housing via the external threaded shaft.

[0006] Furthermore, the connecting device has an external threaded shaft on the left side and a first flange fixedly connected to the right end. The connecting device is threadedly connected to the housing via the external threaded shaft.

[0007] Furthermore, the outer diameter of the connecting device at its maximum point is smaller than the outer diameter of the drill pipe and the oil pipeline.

[0008] This utility model has the following advantages compared with the prior art:

[0009] 1. This utility model, by setting a detachable connecting device, can be adapted to the pipe hoisting needs of different connection types, and has a wider range of applications. During hoisting, it can avoid the problem of the hook and steel rope directly acting on the pipe, causing scratches and damage to the pipe.

[0010] 2. This utility model increases the safety of the hoisting process by using a threaded connection between the shell and the connecting device, and the connecting device and the pipe are connected by a thread or flange connection, thus avoiding the risk of slippage caused by the hook directly acting on the pipe. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a side view of the present invention.

[0013] Figure 3 This is a connection diagram of the first embodiment of the present invention.

[0014] Figure 4 This is a connection diagram of the second embodiment of the present invention.

[0015] In the diagram: 1. Shell, 2. Limiting plate, 3. Rotating shaft, 4. Lifting ring, 5. External threaded shaft, 6. Internal threaded shaft, 7. Lifting ring, 8. First flange, 9. Drill pipe, 10. Oil pipeline, 1001. Second flange. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figures 1 to 4 The auxiliary lifting tool for pipeline maintenance shown includes two housings 1. The housing 1 is cylindrical and open at one end. A rotating shaft 3 is rotatably connected to the center of the closed end of the housing 1. A limit plate 2 is fixedly connected to one end of the rotating shaft 3 inside the housing 1 to prevent the rotating shaft 3 from moving laterally. A lifting ring 4 is fixedly connected to the other end of the rotating shaft 3 to facilitate connection with hooks, ropes, etc. during lifting. The inner surface of the housing 1 is provided with threads. At least one housing 1 is detachably connected to a connecting device. The connecting device is cylindrical and has several lifting rings 7 fixedly connected at intervals in the middle of the connecting device to facilitate the picking up and rotation of the connecting device during connection.

[0018] In the first embodiment of this utility model, the connecting device has an external threaded shaft 5 on the left and an internal threaded shaft 6 on the right. The connecting device is threaded to one of the housings 1 through the external threaded shaft 5, and then threaded to the female thread of the drill rod 9 through the internal threaded shaft 6. The other housing 1 is directly connected to the male thread of the drill rod 9.

[0019] In the second embodiment of this utility model, the connecting device has an external threaded shaft 5 on the left side and a first flange 8 fixedly connected to the right end. Two connecting devices are provided. The connecting devices are threaded to the two housings 1 respectively through the external threaded shaft 5. Then, they are connected to the second flange of the oil pipeline 10 on both sides of the oil pipeline 10 through the first flange 8 respectively.

[0020] To facilitate disassembly of this device during pipeline loading and unloading, the outer diameter of the largest part of the connecting device is smaller than the outer diameter of drill pipe 9 and oil pipeline 10.

[0021] It should be noted that the thread types of the external threaded shaft 5 and the internal threaded shaft 6 in the first embodiment of this device are the same as the thread type of the drill rod 9 to be hoisted. Different thread types of housings 1 and connecting devices can be prepared according to the thread type of the drill rod 9 to be hoisted, so as to meet the needs of different thread types, such as: through-hole thread, internal flat thread, regular thread, etc.

[0022] The working process of this embodiment is as follows:

[0023] Example 1:

[0024] Connect the external threaded shaft 5 on the left side of the connecting device to the internal thread of the housing 1. Then connect the internal threaded shaft 6 on the right side of the connecting device to the female thread of the drill rod 9. Connect the other housing 1 to the male thread of the drill rod 9. Then connect the drill rod 9 to the lifting ring 4 using tools such as hooks and steel ropes. After hoisting into place, unscrew the device from the male and female threads of the drill rod 9.

[0025] Example 2:

[0026] Connect the external threads 5 of the two connecting devices to the internal threads of the housing 1 respectively. Then connect the first flange 8 to the second flanges 1001 on both sides of the oil pipeline 10. Then connect the lifting ring 4 with tools such as hooks and ropes to lift the oil pipeline 10. After lifting into place, remove the device from the second flange 1001 of the oil pipeline 10.

Claims

1. An auxiliary lifting tool for pipeline maintenance, comprising two housings (1), characterized in that: The housing (1) is cylindrical and open at one end. A rotating shaft (3) is rotatably connected to the center of the closed end of the housing (1). A limiting plate (2) is fixedly connected to one end of the rotating shaft (3) inside the housing (1), and a lifting ring (4) is fixedly connected to the other end. The inner surface of the housing (1) is provided with threads. At least one connecting device is detachably connected inside the housing (1). The connecting device is cylindrical, and several lifting rings (7) are fixedly connected at intervals in the middle of the connecting device.

2. The auxiliary hoisting tool for pipeline repair according to claim 1, characterized in that: The connecting device has an external threaded shaft (5) on the left and an internal threaded shaft (6) on the right. The connecting device is threadedly connected to the housing (1) via the external threaded shaft (5).

3. The auxiliary hoisting tool for pipeline repair according to claim 1, characterized in that: The connecting device has an external threaded shaft (5) on the left side and a first flange (8) fixedly connected to the right end. The connecting device is threadedly connected to the housing (1) through the external threaded shaft (5).

4. The auxiliary hoisting tool for pipeline repair according to claim 1, characterized in that: The outer diameter of the connecting device at its maximum point is smaller than the outer diameter of the drill pipe (9) and the oil pipeline (10).

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