Device for detecting drift diameter of lining pipe of oil pipe

Abstract

The utility model relates to the technical field of petroleum equipment, in particular to a drift diameter detection device for a lining pipe of an oil pipe, which comprises a drift diameter gauge, a plurality of open holes are formed in the drift diameter gauge, and the open holes are uniformly distributed on the drift diameter gauge in a circular ring shape; compared with a traditional drift diameter gauge detection device, the drift diameter gauge detection device effectively solves the problems that drift diameter gauges of different specifications need to be selected for oil pipes of different models, and operation is troublesome.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum equipment, in particular to a diameter detection device for an inner liner of an oil pipe. Background Art

[0002] With the development of society, the dependence on oil is getting higher and higher. Oil pipes are needed in the extraction or transportation of oil, and often a liner needs to be inserted into the oil pipe for use. During the production process, after the oil pipe is inserted into the liner, the pipe head of the liner needs to be cut and flanging. After cutting and flanging, the liner needs to be tested for diameter. Currently, manual diameter and visual inspection are used to check whether the diameter size of the inner hole of the liner meets the standard. This inspection method has high labor intensity, is time-consuming and labor-intensive, and has large detection errors.

[0003] To this end, the utility model with application number 201720132973.X proposes a self-propelled casing diameter detection gauge, including a casing, a motor, a driving wheel, a control device, a power supply, a diameter gauge, a signal probe, an elastic support device, and a connecting rod. The scheme enables the diameter gauge to self-propelled in the casing by turning on the control device. When the signal probe reaches the right end of the casing, it can send a signal to the control device to cut off the power supply. That is, the scheme adopts mechanized operation and intelligent control. The operator can stay away from the site, which can avoid personal safety accidents, greatly reduce the labor intensity of workers, and improve work efficiency and casing detection quality.

[0004] However, during the inspection process, the diameter gauge in the above scheme can only detect whether there are bubbles and shrinkage inside the inner liner pipe, but cannot detect whether there are dents, fractures or uneven wear inside the inner liner pipe, because the diameter gauge is a cylindrical shape with fixed model and size. In addition, different models of oil pipes require diameter gauges of different specifications. If the diameter gauge is worn or damaged, it needs to be replaced, which is time-consuming and labor-intensive. Utility Model Content

[0005] The purpose of this scheme is to provide a diameter detection device for the inner liner of an oil pipe, so as to solve the problem that the existing diameter gauge model size is fixed, and different specifications of diameter gauges need to be selected for different types of oil pipes, which is troublesome to operate.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a device for detecting the diameter of an inner liner of an oil pipe, comprising a diameter gauge, on which a plurality of openings are formed, and the openings are evenly distributed in a circular ring shape on the diameter gauge; and further comprising:

[0007] Mounting column: The mounting column is fixedly arranged inside the drift gauge and is coaxially arranged with the central axis of the drift gauge;

[0008] Spring: The spring is sleeved on the mounting post, and one end of the spring is fixedly connected to the mounting post;

[0009] Movable block: the movable block is movably arranged on the diameter gauge and matched with the opening, and a part of the movable block is located outside the diameter gauge;

[0010] Connecting rod: one end of the connecting rod is fixedly connected to the free end of the spring, and the other end is fixedly connected to the movable block;

[0011] Support rod: one end of the support rod is fixedly arranged on the mounting column, and the other end is fixedly connected to the connecting rod;

[0012] Pressure sensor: The pressure sensor is fixedly arranged on the part of the movable block located outside the diameter gauge.

[0013] The principle of this solution is as follows: when in use, the diameter gauge is inserted into the oil pipe to be tested, and the movable block contacts the inner wall of the oil pipe. At this time, the pressure sensor measures a pressure value. During the movement of the diameter gauge inside the oil pipe, the pressure sensor measures the real-time pressure value it is subjected to inside the oil pipe, forming a pressure curve. If the pressure value in a certain period of time increases significantly, it means that this part of the oil pipe has bubbling or shrinkage; if the measured pressure value decreases significantly, it means that this part of the oil pipe has depression, fracture or eccentric wear; at the same time, when testing oil pipes with smaller inner diameters, the movable block can be pushed toward the central axis of the oil pipe. At this time, the movable block drives the connecting rod to move, and the end of the connecting rod connected to the spring moves upward, and the spring is stretched. After the measurement, the diameter gauge is taken out from the inside of the oil pipe and the spring is reset.

[0014] The technical effects of this solution are:

[0015] 1. Use the pressure sensor and the diameter gauge to measure the oil pipe, and judge whether there is any abnormality inside the oil pipe by the change of pressure. Compared with manual measurement, the operation is simple, the measurement results are more stable, and it saves time and effort.

[0016] 2. Several movable blocks are evenly distributed on the diameter gauge in a circular shape. Compared with setting a single movable block, the measuring area is larger, and the measuring result is more accurate.

[0017] 3. The movable block cooperates with the connecting rod, the support rod and the spring to adjust the position of the movable block according to the inner diameter of the oil pipe, so that it can match the oil pipes of different sizes.

[0018] Furthermore, the number of the openings, movable blocks, connecting rods, support rods and pressure sensors is 12 each.

[0019] Furthermore, the device further comprises a controller and a display, wherein the controller is electrically connected to the pressure sensor, and the display is electrically connected to the controller. The pressure sensor is started and stopped by the controller, and the pressure value measured by the pressure sensor is displayed by the display, which is simple and convenient to use.

[0020] Furthermore, it also includes a slider, which is slidably arranged on the support rod, and the spring and the connecting rod are respectively fixed on the slider. The spring and the connecting rod are fixedly connected through the slider, which can make the device more stable during the extension process of the spring and avoid deformation of the spring.

[0021] Furthermore, the movable block is conical.

[0022] Furthermore, the top of the movable block is hinged to the diameter gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The following is a further detailed description through specific implementation methods:

[0026] The figure numerals in the drawings of the specification include: 1. diameter gauge; 2. movable block; 3. mounting column; 4. spring; 5. connecting rod; 6. support rod; 7. slider.

[0027] The embodiment is basically as shown in the attached Figure 1 As shown:

[0028] A device for detecting the diameter of an inner liner of an oil pipe comprises a diameter gauge 1. A plurality of openings are provided on the side wall of the diameter gauge 1. Specifically, 12 openings are provided, which are evenly distributed on the diameter gauge 1 in a circular ring shape and are located at one end of the diameter gauge 1. A movable block 2 is provided at the opening, and a part of the movable block 2 is located outside the diameter gauge 1.

[0029] As attached Figure 2 The movable block 2 is conical, and the top part of the movable block 2 is hinged to the diameter gauge 1 through a hinge seat, so that the movable block 2 can move in the opening, and the part outside the movable block 2 is narrow at the top and wide at the bottom, and its uppermost end is located in the same plane as the outer wall of the diameter gauge 1, so that when the diameter gauge 1 is inserted into the oil pipe, the movable block 2 can automatically adjust its position according to the inner diameter of the oil pipe; a pressure sensor is installed on the widest part of the movable block 2, and the pressure sensor contacts the inner wall of the oil pipe after the diameter gauge 1 enters the oil pipe, the diameter gauge 1 is connected to the controller through a wire, and the controller is connected to the display through a wire; the number of movable blocks 2 is consistent with the opening, both of which are 12.

[0030] A mounting column 3 is welded inside the diameter gauge 1, and the mounting column 3 is coaxially arranged with the diameter gauge 1. A spring 4 is sleeved on the mounting column 3. One end of the spring 4 is welded to the mounting column 3, and a slider 7 is welded to the other end. The slider 7 can slide up and down along the mounting column 3. A connecting rod 5 is welded to the slider 7, and the other end of the connecting rod 5 is welded to the side of the movable block 2 close to the mounting column 3. In order to increase the stability of the device, a support rod 6 is also installed inside the diameter gauge 1. Specifically, one end of the support rod 6 is welded to the mounting column 3 and is located on the fixed end side of the spring 4, and the other end of the support rod 6 is welded to the middle part of the connecting rod 5. There are 12 support rods 6 and 12 connecting rods 5.

[0031] In specific implementation, the existing feeding mechanism is used to fix the oil pipe, and the existing moving mechanism is used to extend the diameter gauge 1 into the oil pipe to be tested. At the same time, the controller is used to open the pressure sensor. After the diameter gauge 1 is extended into the oil pipe, the movable block 2 contacts the inner wall of the oil pipe. At this time, the pressure sensor measures a pressure value. During the movement of the diameter gauge 1 inside the oil pipe, the pressure sensor measures the real-time pressure value it receives inside the oil pipe, forming a pressure curve, and displaying it on the display for easy observation by the operator. If the pressure value in a certain period of time increases significantly, it means that there is bubbling or shrinkage in this part of the oil pipe; if the measured pressure value decreases significantly, it means that there is bubbling or shrinkage in this part of the oil pipe; , indicating that this part of the oil pipe has depressions, fractures or eccentric wear; at the same time, when testing oil pipes with smaller inner diameters, since the narrower part of the movable block 2 enters the inside of the oil pipe first, when the diameter gauge 1 continues to move into the inside of the oil pipe, if the diameter of the oil pipe is smaller than the widest part of the movable block 2, the movable block 2 moves toward the central axis of the oil pipe under the squeezing effect of the inner wall of the oil pipe. At this time, the movable block 2 drives the connecting rod 5 to move, and the end of the connecting rod 5 connected to the spring 4 moves upward, and the spring 4 is stretched. In this way, oil pipes with different inner diameters can be tested without replacing the diameter gauge 1. After the test, the diameter gauge 1 is taken out from the inside of the oil pipe and the spring 4 is reset.

[0032] The above are only embodiments of the utility model, and the utility model is not limited to the fields involved in this implementation case. The common sense such as the known specific structure and characteristics in the scheme is not described too much here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before the date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A device for detecting the diameter of an inner liner of an oil pipe, comprising a diameter gauge (1), It is characterized in that The diameter gauge (1) is provided with a plurality of openings, and the openings are evenly distributed in a circular ring shape on the diameter gauge (1); and further comprising: Mounting column (3): the mounting column (3) is fixedly arranged inside the diameter gauge (1) and is coaxially arranged with the central axis of the diameter gauge (1); Spring (4): the spring (4) is sleeved on the mounting column (3), and one end of the spring is fixedly connected to the mounting column (3); Movable block (2): the movable block (2) is movably arranged on the diameter gauge (1) and cooperates with the opening, and a part of the movable block (2) is located outside the diameter gauge (1); Connecting rod (5): one end of the connecting rod (5) is fixedly connected to the free end of the spring (4), and the other end is fixedly connected to the movable block (2); Support rod (6): one end of the support rod (6) is fixedly arranged on the mounting column (3), and the other end is fixedly connected to the connecting rod (5); Pressure sensor: The pressure sensor is fixedly arranged on a portion of the movable block (2) located outside the diameter gauge (1).

2. The oil pipe inner liner diameter detection device according to claim 1, characterized in that: The number of the openings, movable blocks (2), connecting rods (5), supporting rods (6) and pressure sensors is 12 each.

3. The oil pipe inner liner diameter detection device according to claim 1 is characterized in that: The device also includes a controller and a display, wherein the controller is electrically connected to the pressure sensor, and the display is electrically connected to the controller.

4. The oil pipe inner liner diameter detection device according to claim 1 is characterized in that: It also comprises a slider (7), wherein the slider (7) is slidably arranged on the support rod (6), and the spring (4) and the connecting rod (5) are respectively fixed on the slider (7).

5. The oil pipe inner liner diameter detection device according to claim 1 is characterized in that: The movable block (2) is conical.

6. The oil pipe inner liner diameter detection device according to claim 1, characterized in that: The top of the movable block (2) is hinged to the diameter gauge (1).

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