Oil pipe centralizer

Abstract

The utility model discloses an oil pipe centralizer, two ends of the oil pipe centralizer are respectively and fixedly connected with an oil pipe, and the oil pipe centralizer and the oil pipe are connected in a casing pipe in a sliding mode. The centralizing supporting plates are arranged on the outer side of the middle body and evenly distributed on the outer side of the middle body, and the angles between every two centralizing supporting plates are the same; the oil pipe pup joints are arranged at the two ends of the middle body; and the oil pipe coupling is fixedly connected to the oil pipe pup joint. Through the design of the centralizing supporting plate, the problem of eccentric wear between the oil pipe and the sleeve is solved, it is ensured that the oil pipe always occupies the middle position of the sleeve, pipe column failure accidents such as wear-through, cracks and breakage of the oil pipe and the sleeve caused by contact eccentric wear of the oil pipe and the sleeve are avoided, and the service life of the oil pipe and the service life of the sleeve are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil exploitation, and more specifically, it relates to a tubing centralizer. Background Art

[0002] During the process of oil exploitation, the wellbore trajectory of drilling will change according to geological and oil reservoir conditions, and it is not an ideal geometric shape. Moreover, there are more and more directional wells such as inclined wells or horizontal wells. Since the vibration and eccentric wear will occur between the production tubing and the casing with the operation of the oil production equipment, it will cause damage to the tubing and the casing, shorten the service life of the tubing and the casing, and even lead to well shutdown and well repair, prolonging the construction period. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the problems existing in the prior art, the utility model provides a tubing centralizer to solve the technical problems of damage to the tubing and the casing caused by vibration and eccentric wear between the tubing and the oil casing during the operation of the oil production equipment, shortening the service life of the tubing and the casing, and even leading to well shutdown and well repair, prolonging the construction period.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solutions: a tubing centralizer, the two ends of which are respectively fixedly connected with the tubing. The tubing centralizer and the tubing are slidably connected in the casing, and it includes: an intermediate body; a plurality of centralizing support plates arranged on the outer side of the intermediate body, and the plurality of centralizing support plates are evenly distributed on the outer side of the intermediate body; tubing nipples arranged at both ends of the intermediate body; and tubing collars fixedly connected to the tubing nipples.

[0007] The utility model is further arranged such that the cross-section of the centralizing support plate is arc-shaped, and slopes are arranged at both ends.

[0008] The utility model is further arranged such that the inner side of the centralizing support plate is fixedly connected to the outer side of the intermediate body, and the outer side of the centralizing support plate is slidably connected to the inner side of the casing.

[0009] The utility model is further arranged such that the intermediate body is a hollow cylindrical structure, the inner diameter of the intermediate body is the same as the inner diameter of the tubing, and the inner diameter of the intermediate body is also the same as the inner diameter of the tubing nipple.

[0010] The utility model is further arranged such that both ends of the tubing collar are respectively connected to the tubing and the tubing nipple, and the tubing centralizer is connected between two tubings.

[0011] The present utility model is further configured such that the first port of the tubing coupling is fixedly connected to the outside of the tubing nipple, and the second port of the tubing coupling is fixedly connected to the outside of the tubing.

[0012] The present utility model is further configured such that the outer diameter of the tubing nipple is greater than the outer diameter of the intermediate body.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides a tubing centralizer, which has the following beneficial effects:

[0015] 1. By providing a plurality of centralizing support plates, and the plurality of centralizing support plates are uniformly arranged on the outside of the intermediate body. After the tubing centralizer is connected to the tubing, it can limit the tubing, effectively avoiding contact and eccentric wear of the tubing inside the casing. The cross-section of the centralizing support plate is set as an arc structure, which can reduce the friction with the casing, reduce wear, extend the service life, and the slope design at both ends can prevent local cutting of the casing.

[0016] 2. The detachable design of the tubing coupling realizes quick connection and fixation, facilitating the installation, maintenance and replacement of the tubing centralizer and the tubing. The tubing centralizer is connected between two tubings. The inner diameter of the intermediate body of the tubing centralizer, the inner diameter of the tubing nipple and the inner diameter of the tubing are the same, facilitating the transportation of oil and facilitating the docking with the tubing.

[0017] 3. The outer diameter of the tubing nipple is greater than the outer diameter of the intermediate body, which can limit the tubing coupling, prevent the tubing coupling from sliding onto the intermediate body, improve stability and prevent leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of a tubing centralizer in the present utility model;

[0019] Figure 2 is a cross-sectional view of the intermediate body and the centralizing support plate at the Figure 1 A-A position in.

[0020] Figure 1 - Figure 2 In the figure: 1. Intermediate body; 2. Centralizing support plate; 3. Tubing nipple; 4. Tubing coupling; 5. Slope; 6. First port; 7. Second port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0023] In the present utility model, unless otherwise stated, the orientations such as "upper" and "lower" are generally in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; however, the above orientation terms are not used to limit the present utility model.

[0024] Please refer to Figure 1 - 2 , a tubing centralizer, the two ends of which are respectively fixedly connected to the tubing. The tubing centralizer and the tubing are slidably connected within the casing, and it includes: an intermediate body 1; a plurality of centralizing support plates 2 arranged on the outer side of the intermediate body 1, the plurality of centralizing support plates 2 are evenly distributed on the outer side of the intermediate body 1, and the angle between every two centralizing support plates 2 is the same; tubing nipples 3 arranged at both ends of the intermediate body 1; and tubing couplings 4 fixedly connected to the tubing nipples 3.

[0025] In this embodiment, the centralizing support plates 2 are arranged in three. On the one hand, it can realize filling the casing through the centralizing support plates 2 to support the tubing and prevent eccentric wear. On the other hand, arranging three can save installation space.

[0026] As Figure 2 shown, the cross-section of the centralizing support plate 2 can be set as an arc, and slopes 5 can be provided at both ends. The side of the centralizing support plate 2 that is slidably connected to the casing is an arc, which can effectively reduce the wear between it and the casing. The design of the slopes 5 can save a part of the space compared with the design without slopes, so that it is easier to install the tubing centralizer into the casing.

[0027] To ensure stability, in this embodiment, the inner side of the centralizing support plate 2 is fixedly connected to the outer side of the intermediate body 1. To not affect the normal up-and-down reciprocating movement of the tubing, in this embodiment, the outer side of the centralizing support plate 2 is slidably connected to the inner side of the casing.

[0028] To facilitate the transportation of petroleum, the intermediate body 1 is a hollow cylindrical structure, the inner diameter of the intermediate body 1 is the same as the inner diameter of the tubing, and the inner diameter of the intermediate body 1 is the same as the inner diameter of the tubing nipple 3. If the inner diameter of the intermediate body 1 and the inner diameter of the tubing nipple 3 are smaller than the inner diameter of the tubing, there may be a phenomenon of pipe bursting due to too fast oil velocity. If the inner diameter of the intermediate body 1 and the inner diameter of the tubing nipple 3 are larger than the tubing, it may increase the cost investment. Therefore, in this embodiment, the inner diameter of the intermediate body 1 is set to be the same as the inner diameter of the tubing.

[0029] The two ends of the tubing coupling 4 are respectively connected to the tubing and the tubing nipple 3. The tubing centralizer is connected between two tubings. The first port 6 of the tubing coupling 4 is fixedly connected to the outside of the tubing nipple 3, and the second port 7 of the tubing coupling 4 is fixedly connected to the outside of the tubing. The outer diameter of the tubing nipple 3 is larger than the outer diameter of the intermediate body 1. With such a setting, it can play a limiting role on the tubing coupling 4, effectively preventing the tubing coupling 4 from moving from the tubing nipple 3 to the intermediate body 1, and improving the reliability of the connection.

[0030] The following content specifically describes the present tubing centralizer in combination with the above embodiments. In this embodiment, the tubing centralizer includes an intermediate body 1; the intermediate body 1 is in the shape of a hollow cylinder in the middle, and a plurality of centralizing support plates 2 are connected to the outer side wall of the intermediate body 1. Specifically, three centralizing support plates 2 are provided. On the one hand, it can save costs and space, and on the other hand, it can achieve the filling of the casing, that is, the gap between the centralizing support plate 2 and the casing is very small. With such a setting, after the tubing centralizer is connected to the tubing, it can effectively prevent the tubing from moving laterally within a large range in the casing, resulting in eccentric wear, so as to extend the service life of the tubing and the casing. Both ends of the intermediate body 1 are provided with tubing nipples 3. The inner diameter of the tubing nipple 3 is the same as the inner diameter of the intermediate body 1, and the inner diameter of the intermediate body 1 is the same as the inner diameter of the tubing, which can facilitate oil transportation, effectively prevent pipe explosion, and save cost investment. One end of the tubing coupling 4 is connected to the tubing nipple 3, and the other end of the tubing coupling 4 is connected to the tubing. The outer diameter of the tubing nipple 3 is larger than the outer diameter of the intermediate body 1, which can effectively prevent the end of the tubing coupling 4 connected to the tubing nipple 3 from sliding onto the intermediate body 1, ensuring the stability of the connection structure. After the tubing is connected to the tubing centralizer, it is installed in the casing.

[0031] It can be understood that the same or similar parts in the above embodiments can be referred to each other. The content not detailed in some embodiments can be seen in the same or similar content of other embodiments. The multiple solutions provided by the present invention include the basic solutions of themselves, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve the co-realization of multiple effects.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tubing centralizer, both ends of which are fixedly connected to the tubing, and the tubing centralizer and the tubing are slidably connected in the casing, characterized in that: include: Intermediate (1); A plurality of righting support plates (2) are arranged on the outside of the intermediate body (1), wherein the plurality of righting support plates (2) are evenly distributed on the outside of the intermediate body (1), and the angles between any two adjacent righting support plates (2) are the same; Oil pipe short connections (3) provided at both ends of the intermediate body (1); An oil pipe coupling (4) is fixedly connected to the oil pipe short connection (3).

2. The tubing centralizer according to claim 1, characterized in that: The cross section of the straightening support plate (2) is arranged to be arc-shaped, and slopes (5) are arranged at both ends.

3. A tubing centralizer according to any one of claims 1 or 2, characterized in that: The inner side of the straightening support plate (2) is fixedly connected to the outer side of the intermediate body (1), and the outer side of the straightening support plate (2) is slidably connected to the inner side of the casing.

4. The tubing centralizer according to claim 1, characterized in that: The intermediate body (1) is a hollow cylindrical structure, and the inner diameter of the intermediate body (1) is consistent with the inner diameter of the oil pipe, and the inner diameter of the intermediate body (1) is also consistent with the inner diameter of the oil pipe short connection (3).

5. The tubing centralizer according to claim 1, characterized in that: The two ends of the oil pipe coupling (4) are respectively fixedly connected to the oil pipe and the oil pipe short circuit (3), and the oil pipe centralizer is connected between the two oil pipes.

6. The tubing centralizer according to claim 5, characterized in that: The first port (6) of the oil pipe coupling (4) is fixedly connected to the outer side of the oil pipe short circuit (3), and the second port (7) of the oil pipe coupling (4) is fixedly connected to the outer side of the oil pipe.

7. The tubing centralizer according to claim 6, characterized in that: The outer diameter of the oil pipe short connection (3) is greater than the outer diameter of the intermediate body (1).

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