Embedded ball centralizer

Abstract

The utility model discloses an embedded ball centralizer which comprises a centralizer outer ring, six integrally-formed arc-shaped protrusions are arranged on the surface of the centralizer outer ring in an annular array mode, a plurality of ball mounting holes are formed in the arc-shaped protrusions, rotatable ball bodies are placed in inner cavities of the ball mounting holes, and the ball bodies are connected with the arc-shaped protrusions. The diameter of the outer side of an inner cavity of the ball mounting hole is smaller than that of the ball body, and an inner supporting ring is placed in an inner cavity of the centralizer outer ring. The ball bodies are placed into the inner cavities of the ball mounting holes, then the inner supporting ring is plugged into the inner cavity of the centralizer outer ring to limit the multiple ball bodies and prevent the ball bodies from being separated from the inner cavities of the ball mounting holes, then the mounting ring is plugged into the inner cavity of the centralizer outer ring, and through matching of the outer threads and the inner threads, the ball bodies can be separated from the inner cavities of the ball mounting holes. The balls are screwed into the inner cavity of the centralizer outer ring and abut against the side face of the inner supporting ring, and therefore the purposes that the balls are directly placed in outer ring holes, the multiple balls are installed in place by installing one inner sleeve, and assembling is simple and efficient are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball centralizers, and particularly relates to an inlaid ball centralizer. Background Art

[0002] A centralizer generally refers to a centralizer. A centralizer refers to a rigid and elastic centralizing framework installed on the outer surface of a casing string to ensure that the casing string is centered in the wellbore during oil and gas drilling. During the production process of a ball centralizer, holes are formed on the surface, and a bead sleeve is required to install the balls in the holes. Since there are many parts required and the overall assembly is relatively complex, we have designed an inlaid ball centralizer. The balls are directly placed into the outer ring holes, and an inner sleeve is installed to position multiple balls in place, with simple and efficient assembly. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an inlaid ball centralizer, which has the advantages that the balls are directly placed into the outer ring holes, and an inner sleeve is installed to position multiple balls in place, with simple and efficient assembly, so as to solve the problems in the above background art.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: an inlaid ball centralizer, which comprises a centralizer outer ring: six integrally formed arc-shaped protrusions are arranged in a circumferential array on the surface of the centralizer outer ring, and a plurality of ball mounting holes are formed in the arc-shaped protrusions. A rotatable ball body is placed in the inner cavity of the ball mounting hole. The outer diameter of the outer side of the inner cavity of the ball mounting hole is smaller than the diameter of the ball body. An inner support ring is placed in the inner cavity of the centralizer outer ring. Mounting rings are installed at both ends of the inner cavity of the centralizer outer ring. One end of the mounting ring abuts against the inner support ring. External threads are provided on the surface of the mounting ring, and internal threads adapted to the external threads are provided at both ends of the inner cavity of the centralizer outer ring.

[0005] Preferably, a limiting ring is fixedly connected to one end of the mounting ring, and one side of the limiting ring abuts against the centralizer outer ring.

[0006] Preferably, a plurality of operation holes are formed on one side of the limiting ring away from the centralizer outer ring.

[0007] Preferably, a convex ring is fixedly connected to one side of the mounting ring close to the inner support ring, and annular grooves for inserting the convex ring are formed on both sides of the inner support ring.

[0008] Preferably, the depth of the inner cavity of the ball mounting hole is smaller than the diameter of the ball body.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. In the present utility model, the ball body is placed into the inner cavity of the ball mounting hole, and then the inner support ring is inserted into the inner cavity of the outer ring of the centralizer. The multiple ball bodies are limited in position to prevent the ball bodies from detaching from the inner cavity of the ball mounting hole. Then, the mounting ring is inserted into the inner cavity of the outer ring of the centralizer. Through the cooperation of the external thread and the internal thread, it is screwed into the inner cavity of the outer ring of the centralizer and abuts against the side surface of the inner support ring, so that the balls can be directly placed into the holes of the outer ring, and an inner sleeve is installed to make multiple balls installed in place, achieving the purpose of simple and efficient assembly.

[0011] 2. Through the setting of the limiting ring in the present utility model, the mounting ring can be limited in position, restricting the excessive movement of the mounting ring into the inner cavity of the outer ring of the centralizer, which may cause another mounting ring to protrude from the inner cavity of the outer ring of the centralizer.

[0012] 3. Through the setting of the operation hole in the present utility model, it is convenient for the user to operate the rotation of the mounting ring with the help of tools, providing a force application point for the rotation of the mounting ring.

[0013] 4. Through the combined use of the convex ring and the annular groove in the present utility model, after the convex ring is inserted into the inner cavity of the annular groove, the contact position between the inner support ring and the mounting ring can be sealed, improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Through the following detailed description in combination with the attached drawings, the above and / or other advantages of the present utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the present utility model, where:

[0015] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 is a three-dimensional exploded schematic diagram of an embodiment of the present utility model;

[0017] Figure 3 is a three-dimensional exploded schematic diagram of the inner support ring and the mounting ring of an embodiment of the present utility model.

[0018] In the drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Outer ring of the centralizer, 2. Arc-shaped protrusion, 3. Ball mounting hole, 4. Ball body, 5. Inner support ring, 6. Mounting ring, 7. External thread, 8. Internal thread, 9. Limiting ring, 10. Operation hole, 11. Convex ring, 12. Annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Hereinafter, embodiments of the inlaid ball centralizer of the present utility model will be described with reference to the drawings.

[0021] Figures 1-3An inlaid ball straightener of an embodiment of the utility model is shown, which includes a straightener outer ring 1: the surface annular array of the straightener outer ring 1 is provided with six integrally formed arc-shaped protrusions 2, and the arc-shaped protrusions 2 are provided with a plurality of ball mounting holes 3, and the inner cavity of the ball mounting hole 3 is provided with a rotatable ball body 4, the outer diameter of the inner cavity of the ball mounting hole 3 is smaller than the diameter of the ball body 4, and the depth of the inner cavity of the ball mounting hole 3 is smaller than the diameter of the ball body 4, and the inner cavity of the straightener outer ring 1 is provided with an inner support ring 5, and mounting rings 6 are installed at both ends of the inner cavity of the straightener outer ring 1, and a convex ring 11 is fixedly connected to one side of the mounting ring 6 close to the inner support ring 5, and an annular groove 12 is provided on both sides of the inner support ring 5 for inserting the convex ring 11, and through the coordinated use of the convex ring 11 and the annular groove 12, after the convex ring 11 is inserted into the inner cavity of the annular groove 12, The contact position between the inner support ring 5 and the mounting ring 6 can be sealed, thereby improving the sealing effect. One end of the mounting ring 6 is against the inner support ring 5, and the surface of the mounting ring 6 is provided with an external thread 7. Both ends of the inner cavity of the outer ring 1 of the stabilizer are provided with internal threads 8 that are compatible with the external thread 7. One end of the mounting ring 6 is fixedly connected to a limiting ring 9, and one side of the limiting ring 9 is against the outer ring 1 of the stabilizer. Through the setting of the limiting ring 9, a limiting effect can be played on the mounting ring 6, limiting the mounting ring 6 from moving too much toward the inner cavity of the outer ring 1 of the stabilizer, causing another mounting ring 6 to protrude from the inner cavity of the outer ring 1 of the stabilizer. A plurality of operating holes 10 are provided on the side of the limiting ring 9 away from the outer ring 1 of the stabilizer. Through the setting of the operating holes 10, it is convenient for the user to operate the rotation of the mounting ring 6 with the help of tools, thereby providing a force application point for the rotation of the mounting ring 6.

[0022] Working principle: When the utility model is used, the user places the ball body 4 into the inner cavity of the ball mounting hole 3, and then inserts the inner support ring 5 into the inner cavity of the outer ring 1 of the centralizer to limit the multiple ball bodies 4 to prevent the ball bodies 4 from escaping from the inner cavity of the ball mounting hole 3, and then inserts the mounting ring 6 into the inner cavity of the outer ring 1 of the centralizer, and through the cooperation of the external thread 7 and the internal thread 8, screws it into the inner cavity of the outer ring 1 of the centralizer and abuts against the side of the inner support ring 5. During this period, the limit ring 9 abuts against the outer ring 1 of the centralizer to limit the further movement of the outer ring 1 of the centralizer, and the convex ring 11 is inserted into the inner cavity of the annular groove 12 to ensure the sealing effect of the connection between the inner support ring 5 and the mounting ring 6.

[0023] To sum up: the embedded ball straightener, by placing the ball body 4 into the inner cavity of the ball mounting hole 3, and then inserting the inner support ring 5 into the inner cavity of the outer ring 1 of the straightener, limits the multiple ball bodies 4 to prevent the ball bodies 4 from escaping from the inner cavity of the ball mounting hole 3, and then inserting the mounting ring 6 into the inner cavity of the outer ring 1 of the straightener, and through the cooperation of the external thread 7 and the internal thread 8, screwing it into the inner cavity of the outer ring 1 of the straightener and resting on the side of the inner support ring 5, the ball can be directly placed in the outer ring hole, and an inner sleeve can be installed to allow multiple balls to be installed in place, and the assembly is simple and efficient.

Claims

1. A mosaic ball centralizer, characterized in that: The invention comprises an outer ring (1) of a centralizer: the surface of the outer ring (1) is provided with six integrally formed arc-shaped protrusions (2) in an annular array; the arc-shaped protrusions (2) are provided with a plurality of ball mounting holes (3); the inner cavity of the ball mounting hole (3) is provided with a rotatable ball body (4); the outer diameter of the inner cavity of the ball mounting hole (3) is smaller than the diameter of the ball body (4); the inner cavity of the outer ring (1) is provided with an inner support ring (5); mounting rings (6) are installed at both ends of the inner cavity of the outer ring (1); one end of the mounting ring (6) is against the inner support ring (5); the surface of the mounting ring (6) is provided with an external thread (7); and the inner cavity of the outer ring (1) is provided with an internal thread (8) matching the external thread (7) at both ends.

2. The embedded ball centralizer according to claim 1, characterized in that: One end of the mounting ring (6) is fixedly connected to a limiting ring (9), and one side of the limiting ring (9) abuts against the outer ring (1) of the centralizer.

3. The embedded ball centralizer according to claim 2, characterized in that: A plurality of operating holes (10) are provided on a side of the limiting ring (9) away from the outer ring (1) of the centralizer.

4. The embedded ball centralizer according to claim 3, characterized in that: A convex ring (11) is fixedly connected to one side of the mounting ring (6) close to the inner support ring (5), and an annular groove (12) for inserting the convex ring (11) is provided on both sides of the inner support ring (5).

5. The embedded ball centralizer according to claim 4, characterized in that: The depth of the inner cavity of the ball mounting hole (3) is smaller than the diameter of the ball body (4).

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