Adjustable rigid ball centralizer

Abstract

The utility model discloses an adjustable rigid ball centralizer which comprises a centralizer body, a plurality of ribs are arranged on the side wall of the centralizer body, ball grooves are formed in the ribs, cleaning and scraping assemblies are connected in the ball grooves in a sliding mode, a plurality of balls located between the cleaning and scraping assemblies are installed in the ball grooves in a rolling mode, and the balls are arranged on the side wall of the centralizer body. The side walls of the upper ends and the lower ends of the ribs are detachably connected with plugging assemblies, and the two plugging assemblies abut against the cleaning and scraping assembly. The ball groove cleaning device is reasonable in structural design, the inner wall of the ball groove can be cleaned and silt in the ball groove can be pushed out by moving the scraping plate, the inner wall of the ball groove can be conveniently washed subsequently, the cleaning efficiency and the cleaning quality are guaranteed, the connecting plate moves along with the scraping plate, balls can be brought out of ribs, the balls can be conveniently replaced, and the service life of the ball groove is prolonged. The positions and the number of the balls can be adjusted by clamping the balls into different clamping grooves, and different use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of ball centralizers, in particular to an adjustable rigid ball centralizer. Background Art

[0002] A casing centralizer is a structure used to straighten the casing. It can be divided into ball casing centralizers, roller casing centralizers, etc. The outer surface of the casing can move relative to the inner wall, thereby facilitating the straightening of the casing in the wellhead.

[0003] In the existing rigid ball centralizer, the ball is arranged in the ball groove, which makes it inconvenient to disassemble the movable ball, making it inconvenient to replace and maintain the movable ball. In addition, when in use, there are usually impurities such as mud and sand on the inner wall of the ball groove and the ball on the centralizer. At present, the inner wall of the centralizer is usually cleaned by flushing. Due to the small gap between the ball and the inner wall of the groove block, it is more difficult for the staff to clean the inner wall of the groove block, affecting the work efficiency. For this reason, we designed an adjustable rigid ball centralizer to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art, and an adjustable rigid ball straightener is proposed, which can clean the inner wall of the ball groove by moving the scraper, and push out the mud and sand in the ball groove, so as to facilitate the subsequent flushing of the inner wall of the ball groove and ensure the cleaning efficiency and cleaning quality. The connecting plate follows the movement of the scraper to bring the balls out of the ribs, so as to facilitate the replacement of the balls. By inserting the balls into different slots, the position and quantity of the balls can be adjusted to meet different usage requirements.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An adjustable rigid ball centralizer comprises a centralizer body, the side wall of the centralizer body is provided with a plurality of ribs, a plurality of the ribs are provided with ball grooves, a plurality of the ball grooves are slidably connected with a cleaning and scraping assembly, a plurality of balls located between the cleaning and scraping assemblies are rollingly installed in the ball grooves, the upper and lower side walls of the ribs are detachably connected with blocking assemblies, and the two blocking assemblies are both against the cleaning and scraping assembly.

[0007] Preferably, the plurality of ribs are evenly distributed on the side wall of the centralizer body in a ring array, and the plurality of ribs are inclined.

[0008] Preferably, the ball groove is opened vertically through the rib and is communicated with the front side wall of the rib.

[0009] Preferably, the ball extends to the front side of the rib, and the front side wall of the rib is symmetrically provided with two flanges extending into the ball groove, the flanges abut against the ball and the inner side walls of the flanges are arranged in an arc shape.

[0010] Preferably, the scraping assembly comprises two scrapers slidably connected in the ball groove, the two scrapers are both against the inner side wall of the ball groove, and the two scrapers are connected by a connecting plate.

[0011] Preferably, a plurality of slots are formed through the connecting plate, and the plurality of balls are respectively located in the plurality of slots, and the inner side walls of the plurality of slots are all smoothly arranged.

[0012] Preferably, the blocking assembly comprises a blocking plate connected to the upper end of the rib by screws, and the bottom of the blocking plate is fixedly connected to a butt plate that butts against the upper end of the scraper.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. For this adjustable rigid ball centralizer, when sand and mud are accumulated in the ball groove or the ball is worn and needs to be replaced, the sealing plate can be removed by unscrewing the screws, and then the scraper can be pulled outward from the ribs. During the movement of the scraper outward from the ribs, the inner wall of the ball groove can be cleaned and the sand and mud in the ball groove can be pushed out, which is convenient for subsequent flushing of the inner wall of the ball groove, thereby ensuring the cleaning efficiency and cleaning quality.

[0015] 2. In the adjustable rigid ball straightener, when the scraper moves outward from the rib, the connecting plate moves along with the scraper to bring the balls outward from the rib, thereby facilitating the replacement of the balls. By inserting the balls into different slots, the position and quantity of the balls can be adjusted to meet different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure from a first-view perspective of an adjustable rigid ball centralizer proposed by the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure at center;

[0018] Figure 3 A schematic diagram of the third perspective structure of an adjustable rigid ball centralizer proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the main plane structure of an adjustable rigid ball centralizer proposed by the utility model;

[0020] Figure 5 for Figure 4 A magnified view of the structure at B in the middle;

[0021] Figure 6 It is a schematic diagram of the connection between the connecting plate and the card slot.

[0022] In the figure: 1. stabilizer body; 2. ribs; 3. ball groove; 4. ball; 5. flange; 6. scraper; 7. connecting plate; 8. blocking plate; 9. screws; 10. abutment plate; 11. slot. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-Figure 6 An adjustable rigid ball centralizer includes a centralizer body 1, a plurality of ribs 2 are arranged on the side wall of the centralizer body 1, the plurality of ribs 2 are evenly distributed on the side wall of the centralizer body 1 in a circular array, the plurality of ribs 2 are arranged obliquely, and the arrangement of the ribs 2 can increase the strength of the centralizer body 1, and the plurality of ribs 2 are provided with ball grooves 3, the ball grooves 3 are arranged on the ribs 2 from top to bottom and are connected with the front side wall of the ribs 2, so that the balls 4 can extend outside the ball grooves 3 to reduce the friction between the balls 4 and the well wall;

[0025] A plurality of ball grooves 3 are slidably connected with a cleaning scraper assembly, a plurality of balls 4 are rotatably installed in the ball grooves 3 and located between the cleaning scraper assemblies, and the cleaning scraper assembly includes two scrapers 6 slidably connected in the ball grooves 3, and the two scrapers 6 are both against the inner side walls of the ball grooves 3, so that the scrapers 6 can clean the inner wall of the ball grooves 3 during the movement, which is conducive to subsequent flushing, ensuring cleaning efficiency and cleaning quality, and reducing cleaning dead corners;

[0026] The two scrapers 6 are connected by a connecting plate 7 so that the two scrapers 6 can move synchronously. A plurality of slots 11 are formed on the connecting plate 7. The plurality of balls 4 are respectively located in the plurality of slots 11. When the two scrapers 6 move out of the ball groove 3, the balls 4 can be taken out, which is convenient for replacing the worn balls. The diameter of the slots 11 is smaller than the diameter of the balls 4, so that the balls 4 will not fall off from the rear side of the connecting plate 7, and the slots 11 can limit the balls 4. The positions and quantities of the balls 4 can be adjusted by inserting the balls 4 into different slots 11. The inner side walls of the plurality of slots 11 are all smoothly arranged, which can reduce the friction between the balls 4 and the balls 4. The balls 4 extend to the front side of the rib 2. The front side wall of the rib 2 is symmetrically provided with two flanges 5 extending into the ball groove 3. The flanges 5 abut against the balls 4 and the inner side walls of the flanges 5 are arranged in an arc shape. The arrangement of the flanges 5 can prevent the balls 4 from falling off from the ball groove 3.

[0027] The upper and lower side walls of the rib 2 are detachably connected with sealing components, and the two sealing components are both against the scraping components. The sealing components include a sealing plate 8 connected to the upper end of the rib 2 by screws 9, and the bottom of the sealing plate 8 is fixedly connected with a butt plate 10 that butts against the upper end of the scraper 6. The butt plates 10 on the upper and lower sealing components are respectively against the opposite side walls of the two scrapers 6, which can stably fix the scraper 6 and the ball 4 in the ball groove 3.

[0028] The functional principle of the utility model can be explained through the following operation modes:

[0029] In the utility model, when the adjustable rigid ball straightener is in use, the straightener body 1 is sleeved on the casing to straighten the casing, and the balls 4 can reduce the friction between the straightener and the inner wall of the well. When the adjustable rigid ball straightener is in use, when mud and sand accumulate in the ball groove 3 or the balls 4 are worn and need to be replaced, the sealing plate 8 can be removed by unscrewing the screws 9, and then the scraper 6 can be pulled outward from the rib 2. During the movement of the scraper 6 outward from the rib 2, the inner wall of the ball groove 3 can be cleaned, and the mud and sand in the ball groove 3 can be pushed out, which is convenient for subsequent flushing of the inner wall of the ball groove 3. After the upper and lower sealing plates 8 are disassembled and the two scrapers 6 and the balls 4 are taken out, the through-type arrangement of the ball groove 3 can ensure the cleaning efficiency and cleaning quality.

[0030] When the scraper 6 moves outward from the rib 2, the connecting plate 7 follows the scraper 6 to bring out the ball 4, thereby facilitating the replacement of the ball 4. By inserting the ball 4 into different slots 11, the position and quantity of the ball 4 can be adjusted to meet different usage requirements.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable rigid ball centralizer, comprising a centralizer body (1), characterized in that: The side wall of the centralizer body (1) is provided with a plurality of ribs (2), each of the plurality of ribs (2) is provided with a ball groove (3), each of the plurality of ball grooves (3) is slidably connected with a cleaning and scraping assembly, a plurality of balls (4) located between the cleaning and scraping assemblies are rollingly installed in the ball grooves (3), and the upper and lower side walls of the ribs (2) are detachably connected with a blocking assembly, and the two blocking assemblies are both against the cleaning and scraping assembly.

2. The adjustable rigid ball centralizer according to claim 1, characterized in that: The plurality of ribs (2) are evenly distributed on the side wall of the centralizer body (1) in a circular array, and the plurality of ribs (2) are all arranged obliquely.

3. The adjustable rigid ball centralizer according to claim 1, characterized in that: The ball groove (3) is formed on the rib (2) from top to bottom and is communicated with the front side wall of the rib (2).

4. The adjustable rigid ball centralizer according to claim 1, characterized in that: The ball (4) extends to the front side of the rib (2), and the front side wall of the rib (2) is symmetrically provided with two flanges (5) extending into the ball groove (3), the flanges (5) abut against the ball (4) and the inner side walls of the flanges (5) are arranged in an arc shape.

5. The adjustable rigid ball centralizer according to claim 1, characterized in that: The scraping assembly comprises two scrapers (6) slidably connected in the ball groove (3), the two scrapers (6) are both against the inner side wall of the ball groove (3), and the two scrapers (6) are connected by a connecting plate (7).

6. The adjustable rigid ball centralizer according to claim 5, characterized in that: The connecting plate (7) is provided with a plurality of slots (11) extending therethrough, the plurality of balls (4) are respectively located in the plurality of slots (11), and the inner side walls of the plurality of slots (11) are all smoothly arranged.

7. The adjustable rigid ball centralizer according to claim 5, characterized in that: The blocking assembly comprises a blocking plate (8) connected to the upper end of the rib (2) via screws (9), and a butt plate (10) abutting against the upper end of the scraper (6) is fixedly connected to the bottom of the blocking plate (8).

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