Pipeline centralizer

Abstract

A pipeline centralizer comprises a centralizer body, an upper supporting leg and a lower supporting leg, the centralizer body is a cylinder, a plurality of supporting lug plate sets are evenly distributed and connected to the peripheral side wall of the centralizer body, the upper supporting leg and the lower supporting leg are in an inclined shape, a round hole is formed in the bottom end of the upper supporting leg, a roller is connected to the top end of the upper supporting leg, and a frame is connected to the top end of the lower supporting leg. A round hole is formed in the frame, the bottom end of the upper supporting leg is inserted into the frame at the top end of the frame, and a spring is connected between the lower portion of the upper supporting leg and the upper portion of the lower supporting leg. The spring is connected between the upper supporting leg and the lower supporting leg, so that the two supporting legs can move relatively to be opened or tightened, the upper supporting leg and the lower supporting leg of the centralizer are opened or tightened to adapt to the change of the diameter of a pipeline when the centralizer encounters the shrinkage or enlargement of the underground pipeline or the change of the stratum in the drilling process, and meanwhile, reverse supporting force is generated; the tool is pushed to the center of the pipeline to keep the stability of the tool string.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling operations, in particular to a pipeline centralizer. Background Art

[0002] In oil drilling projects, pipe centralizers are an important downhole tool. Their main function is to ensure the correct position of the tool string in the wellbore, prevent the tool string from contacting the wellbore wall, and reduce the risk of wear and jamming. Through its unique design and working principle, pipe centralizers play a key role in improving drilling efficiency and protecting the integrity of the casing. The main part of the centralizer is connected to the tool string. During the drilling process, as the tool string is continuously lowered, the centralizer moves with it. When the currently commonly used centralizer encounters the situation where the underground pipeline shrinks or expands or the formation changes, the centralizer cannot adapt to the change in pipe diameter in time. When pushing the tool to the center of the pipeline, it is difficult to maintain the stability of the tool string, or the centralizer needs to be removed from the pipeline and adjusted to adapt to the changed pipe diameter, which is time-consuming and labor-intensive. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a pipeline centralizer.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A pipeline centralizer includes a centralizer body, an upper support leg and a lower support leg. The centralizer body is a cylinder. A plurality of support ear plate groups are evenly connected to the circumferential side wall of the centralizer body. The upper support leg and the lower support leg are in a "ヘ" shape. A circular hole is provided at the bottom end of the upper support leg, and a roller is connected to the top end. The top end of the lower support leg is connected to a frame frame, and a circular hole is provided on the frame frame. The bottom end of the upper support leg is inserted into the frame frame at the top end of the frame frame, and the upper support leg and the lower support leg are movably connected to the centralizer body through a rotating shaft passing through the support ear plate group, the frame frame and the circular hole at the bottom end of the upper support leg. A spring is connected between the lower part of the upper support leg and the upper part of the lower support leg.

[0006] The upper supporting legs and the lower supporting legs are connected to the roller via a frame, and the central axis of the roller is connected to the frame.

[0007] The lower part of the upper supporting leg and the upper part of the lower supporting leg are connected to the side wall of the centralizer body on one side, and a spring fixing seat is provided on the spring fixing seat. The two ends of the spring are respectively connected to the spring fixing holes of the spring fixing seat on the upper supporting leg and the lower supporting leg.

[0008] The side walls of the centralizer body are connected with three or four groups of supporting ear plates.

[0009] The beneficial effect of the utility model is that a spring is connected between the upper and lower support legs of the utility model, so that the upper support leg and the lower support leg can move relative to each other and open or tighten. Rollers are installed on the two support legs. During the drilling process, when the centralizer encounters the shrinkage or expansion of the underground pipeline or the change of the formation, the upper and lower support legs of the centralizer will open or tighten and deform to adapt to the change of the pipeline diameter, and at the same time generate a reverse supporting force to push the tool to the center of the pipeline and maintain the stability of the tool string. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the upper and lower support legs of the present invention in an open state;

[0012] Figure 3 This is a schematic diagram of the upper and lower support legs of the present invention in a tightened state;

[0013] In the figure: 1- roller; 2- upper support leg; 3- spring; 4- rotating shaft; 5- lower support leg; 6- centralizer body; 7- support lug assembly; 8- frame; 9- center axis; 10- spring fixing seat; 11- spring mounting hole;

[0014] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] A pipe centralizer includes a centralizer body 6, an upper support leg 2 and a lower support leg 5. The centralizer body 6 is a cylinder, and multiple groups of support ear plate groups 7 are evenly connected to the circumferential side walls of the centralizer body 6. The upper support leg 2 and the lower support leg 5 are in a "ヘ" shape. A circular hole is opened at the bottom end of the upper support leg 2, and a roller 1 is connected to the top end. The top end of the lower support leg 5 is connected to a frame 8, and a circular hole is opened on the frame 8. The bottom end of the upper support leg 2 is inserted into the frame 8 at the top end of the frame 8, and the upper support leg 2 and the lower support leg 5 are movably connected to the centralizer body 6 through a rotating shaft 4 that passes through the support ear plate group 7, the frame 8 and the circular hole at the bottom end of the upper support leg 2. A spring 3 is connected between the lower part of the upper support leg 2 and the upper part of the lower support leg 5.

[0017] The upper supporting leg 2 and the lower supporting leg 5 are connected to the roller 1 through a frame 8 , and the central axis 9 of the roller 1 is connected to the frame 8 .

[0018] The lower part of the upper support leg 2 and the upper part of the lower support leg 5 are connected to the side wall away from the centralizer body 6 with a spring fixing seat 10, and a spring mounting hole 11 is opened on the spring fixing seat 10. The two ends of the spring 3 are respectively connected to the spring mounting holes 11 of the spring fixing seat 10 on the upper support leg 2 and the lower support leg 5.

[0019] The side walls of the centralizer body 6 are connected with three or four groups of supporting ear plate groups 7.

[0020] During operation, the tool string is connected to the centralizer body 6 by threaded connection, and then lowered into the downhole pipe. The centralizer body 6 is opened and closed by the upper support leg 2 and the lower support leg 5, as shown in FIG. Figure 2 、 Figure 3 As shown, the rollers 1 on the upper and lower support legs conform to the wellbore wall and support the tool in the center of the pipe. During the drilling process, as the tool string is lowered, the centralizer moves with it. When the centralizer encounters changes in the underground pipe, such as shrinkage or expansion, or changes in the formation, the upper and lower support legs 2 and 5 of the centralizer body 6 will expand or contract to adapt to the change in pipe diameter. At the same time, they generate a reverse support force, pushing the tool toward the center of the pipe and maintaining the stability of the tool string.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A pipe centralizer, characterized in that: The invention comprises a centralizer body (6), an upper support leg (2) and a lower support leg (5), wherein the centralizer body (6) is a cylindrical body, and a plurality of support ear plate groups (7) are evenly connected to the peripheral side wall of the centralizer body (6), the upper support leg (2) and the lower support leg (5) are in a "ヘ" shape, the bottom end of the upper support leg (2) is provided with a circular hole, and the top end is connected to a roller (1), and the top end of the lower support leg (5) is connected to a frame (8), and the frame A circular hole is opened on (8), the bottom end of the upper supporting leg (2) is inserted into the frame frame (8) at the top end of the frame frame (8), and the upper supporting leg (2) and the lower supporting leg (5) are movably connected to the centralizer body (6) through the rotating shaft (4) passing through the supporting ear plate group (7), the frame frame (8) and the circular hole at the bottom end of the upper supporting leg (2), and a spring (3) is connected between the lower part of the upper supporting leg (2) and the upper part of the lower supporting leg (5).

2. A pipe centralizer according to claim 1, characterized in that: The upper supporting leg (2) and the lower supporting leg (5) are connected to the roller (1) via a frame (8), and the central axis (9) of the roller (1) is connected to the frame (8).

3. A pipeline centralizer according to claim 2, characterized in that: The lower part of the upper supporting leg (2) and the upper part of the lower supporting leg (5) are connected to a side wall of the centralizer body (6) on one side thereof. A spring mounting hole (11) is provided on the spring mounting seat (10). The two ends of the spring (3) are respectively connected to the spring mounting holes (11) of the spring mounting seat (10) on the upper supporting leg (2) and the lower supporting leg (5).

4. A pipeline centralizer according to claim 3, characterized in that: The side walls of the centralizer body (6) are connected with three or four groups of supporting ear plate groups (7).

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