Scraping device for oil field workover treatment

Abstract

The utility model relates to the technical field of oil field well repair, and discloses a scraping device for oil field well repair operation, which comprises a rotary mounting head assembly, an automatic adjustable scraping mechanism is arranged on the inner wall of the rotary mounting head assembly, the rotary mounting head assembly comprises a mounting head body, a limiting mounting groove is formed in the middle end of the interior of the mounting head body, and the limiting mounting groove is matched with the limiting mounting groove. A rotary mounting head assembly and an automatic adjustable scraping mechanism are arranged, a servo motor is arranged to drive a lead screw to rotate, the lead screw drives a quadrangular frustum pyramid to move downwards, and the quadrangular frustum pyramid moves downwards to extrude rolling wheels on a first scraping assembly, a second scraping assembly, a third scraping assembly and a fourth scraping assembly correspondingly; the roller drives the scraping knife to move towards the outer side of the mounting head body through the rotating shaft, the mounting frame and the arc-shaped plate, so that the purpose of adjusting the scraping diameter is achieved, scraping knives of multiple sizes do not need to be additionally arranged, the scraping knives do not need to be replaced, the equipment cost is reduced, and the efficiency of oil field workover operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of oilfield well repair technology, and in particular to a scraping device for oilfield well repair operations. Background Technology

[0002] Before oil, gas and water well testing and maintenance operations, two procedures are usually carried out: first, well cleaning and then scraping. First, according to the casing diameter, an API standard well gauge is used to clean the casing to the bottom of the artificial well to verify the wellbore's permeability, ensuring that large-diameter and long tools can be smoothly lowered to the predetermined well depth. Then, a casing scraper is lowered to scrape the inner wall of the casing, removing mortar, cement, hard wax, salt scale, and burrs from the blast holes, etc., to keep the inner wall of the casing smooth and regular, preventing damage to tools such as packers inside the well.

[0003] Existing scraping devices used in oilfield well workover operations cannot adjust the scraping diameter for casings with different inner diameters when working on the inner wall of the casing. This requires the use of scrapers of different sizes as spares, which not only increases equipment costs significantly, but also makes it time-consuming and labor-intensive to replace the scrapers, thus reducing the efficiency of oilfield well workover operations.

[0004] Therefore, we propose a scraping device for oilfield well workover operations. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a scraping device for oilfield well repair operations.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a scraping device for oilfield well workover operations, comprising a rotary mounting head assembly, wherein the inner wall of the rotary mounting head assembly is provided with an automatically adjustable scraping mechanism, the rotary mounting head assembly includes a mounting head body, a limiting mounting groove is formed at the middle of the inner wall of the mounting head body, and a limiting movable groove is uniformly formed at the middle of the outer wall of the mounting head body, and limiting grooves are formed at the top and bottom of the inner wall of the mounting head body at the limiting movable groove, the automatically adjustable scraping mechanism includes a servo motor, and the top of the servo motor is fixedly connected to the top of the inner wall of the mounting head body at the limiting mounting groove, a lead screw is fixedly mounted at the output end of the servo motor, and the bottom of the lead screw is movably connected to the bottom of the inner wall of the mounting head body at the limiting mounting groove, a limiting block is threadedly connected to the outer wall of the lead screw, and the outer wall of the limiting block is movably connected to the inner wall of the mounting head body at the limiting mounting groove, a quadrangular frustum is fixedly mounted at the bottom of the limiting block, and the inner wall of the quadrangular frustum is threadedly connected to the outer wall of the lead screw.

[0007] Preferably, a block is fixedly installed at the bottom of the quadrangular frustum, and the inner wall of the block is threadedly connected to the outer wall of the lead screw. A first scraping component is provided on the right side of the outer wall of the block.

[0008] Preferably, the front end of the outer wall of the block is provided with a second scraping component, and the structure of the second scraping component is the same as that of the first scraping component.

[0009] Preferably, a third scraping component is provided on the left side of the outer wall of the block, and the structure of the third scraping component is the same as that of the first scraping component.

[0010] Preferably, a fourth scraping component is provided at the rear end of the outer wall of the block, and the structure of the fourth scraping component is the same as that of the first scraping component.

[0011] Preferably, the first scraping assembly includes a roller, and the outer wall of the roller is in movable contact with the outer walls of the block and the truncated square.

[0012] Preferably, a rotating shaft is movably mounted on the inner wall of the roller, a mounting bracket is fixedly mounted on the outer wall of the rotating shaft, and an arc-shaped plate is fixedly mounted on the right side wall of the mounting bracket.

[0013] Preferably, a scraper is fixedly installed on the right side wall of the arc-shaped plate, and the outer wall of the scraper is movably connected to the inner wall of the mounting head body at the limiting movable groove.

[0014] Preferably, the scraper is fixedly installed on the top left side and bottom left side, and the outer wall of the limiting slider is movably connected to the inner wall of the mounting head body at the limiting groove.

[0015] This utility model provides a scraping device for oilfield well workover operations. It has the following beneficial effects:

[0016] 1. This scraping device for oilfield well workover operations comprises a rotating mounting head assembly and an automatically adjustable scraping mechanism. A servo motor drives a lead screw to rotate, which in turn moves a four-sided truncated cone downwards. The downward movement of the four-sided truncated cone presses against rollers on the first, second, third, and fourth scraping assemblies. The rollers, through a rotating shaft, mounting frame, and arc plate, drive the scraper blades to move outwards from the mounting head body, thereby adjusting the scraping diameter. This eliminates the need for multiple scraper blades of different sizes and the need to replace scraper blades, reducing equipment costs and improving the efficiency of oilfield well workover operations.

[0017] 2. This scraping device for oilfield well workover operations is equipped with a lead screw with a self-locking function, which can prevent the first, second, third, and fourth scraping components from loosening under pressure, thereby improving the operational stability of the entire device.

[0018] 3. This scraping device for oilfield well workover operations, by setting a limiting slider and a limiting groove, allows the first scraping component, the second scraping component, the third scraping component and the fourth scraping component to be limited at the limiting groove, thereby preventing the first scraping component, the second scraping component, the third scraping component and the fourth scraping component from detaching from the mounting head body and improving the structural stability of the entire device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0020] Figure 2 This is a front view of the rotating mounting head assembly of this utility model.

[0021] Figure 3 This is a front view of the automatic adjustable scraping mechanism of this utility model.

[0022] Figure 4 This is a front view of the first scraping component of this utility model.

[0023] Legend: 10. Rotary mounting head assembly; 11. Automatic adjustable scraping mechanism; 12. Mounting head body; 13. Limiting mounting groove; 14. Limiting movable groove; 15. Servo motor; 16. Lead screw; 17. Limiting block; 18. Quadrangular truncated pyramid; 19. Cube; 20. First scraping assembly; 21. Second scraping assembly; 22. Third scraping assembly; 23. Fourth scraping assembly; 24. Roller; 25. Rotating shaft; 26. Mounting bracket; 27. Arc plate; 28. Scraper; 29. ​​Limiting slider; 30. Limiting groove. Detailed Implementation

[0024] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1: A scraping device for oilfield well workover operations, such as Figures 1-2As shown, the device includes a rotary mounting head assembly 10, with an automatically adjustable scraping mechanism 11 on its inner wall. The rotary mounting head assembly 10 includes a mounting head body 12. A limiting mounting groove 13 is formed at the center of the inner wall of the mounting head body 12. Limiting movable grooves 14 are evenly formed at the center of the outer wall of the mounting head body 12. Limiting grooves 30 are formed at the top and bottom of the inner wall of the mounting head body 12 at the limiting movable grooves 14. The device utilizes the rotary mounting head assembly 10 and the automatically adjustable scraping mechanism 11, and is powered by a servo motor 15. The screw 16 rotates, causing the quadrangular truncated cone 18 to move downwards. The quadrangular truncated cone 18 moves downwards and presses the rollers 24 on the first scraping assembly 20, the second scraping assembly 21, the third scraping assembly 22, and the fourth scraping assembly 23 respectively. The rollers 24 drive the scraper 28 to move outwards from the mounting head body 12 through the rotating shaft 25, the mounting bracket 26, and the arc plate 27, thereby achieving the purpose of adjusting the scraping diameter. There is no need to equip multiple scraper 28s of different sizes, nor is it necessary to replace the scraper 28, which reduces equipment costs and improves the efficiency of oilfield well repair operations.

[0031] Example 2: Based on Example 1, as follows Figure 3 As shown, the automatic adjustable scraping mechanism 11 includes a servo motor 15, the top of which is fixedly connected to the top of the inner wall of the mounting head body 12 at a limiting mounting groove 13. A lead screw 16 is fixedly mounted on the output end of the servo motor 15, and the bottom of the lead screw 16 is movably connected to the bottom of the inner wall of the mounting head body 12 at a limiting mounting groove 13. A limiting block 17 is threadedly connected to the outer wall of the lead screw 16, and the outer wall of the limiting block 17 is movably connected to the inner wall of the mounting head body 12 at a limiting mounting groove 13. A truncated pyramid 18 is fixedly mounted on the bottom of the limiting block 17, and the inner wall of the truncated pyramid 18 is threadedly connected to the outer wall of the lead screw 16. A block 19 is fixedly mounted on the bottom of the truncated pyramid 18, and the inner wall of the block 19 is threadedly connected to the outer wall of the lead screw 16. The outer wall of the block 19 is connected by a first scraping assembly 20 on the right side, a second scraping assembly 21 on the front end of the outer wall of the block 19 with the same structure as the first scraping assembly 20, a third scraping assembly 22 on the left side of the outer wall of the block 19 with the same structure as the first scraping assembly 20, and a fourth scraping assembly 23 on the rear end of the outer wall of the block 19 with the same structure as the first scraping assembly 20. A lead screw 16 is provided, which has a self-locking function, to prevent the first scraping assembly 20, the second scraping assembly 21, the third scraping assembly 22 and the fourth scraping assembly 23 from loosening under pressure, thereby improving the operational stability of the entire device.

[0032] Example 3: Based on Examples 1 and 2, as follows... Figure 4As shown, the first scraping assembly 20 includes a roller 24, the outer wall of which is in movable contact with the outer walls of the block 19 and the truncated pyramid 18, respectively. A rotating shaft 25 is movably mounted on the inner wall of the roller 24, and a mounting bracket 26 is fixedly mounted on the outer wall of the rotating shaft 25. An arc-shaped plate 27 is fixedly mounted on the right side wall of the mounting bracket 26, and a scraper 28 is fixedly mounted on the right side wall of the arc-shaped plate 27. The outer wall of the scraper 28 is movably connected to the inner wall of the mounting head body 12 at the limiting movable groove 14. The top left and bottom left sides of the scraper 28 are both fixedly mounted. A limiting slider 29 is provided, and the outer wall of the limiting slider 29 is movably connected to the inner wall of the mounting head body 12 at the limiting groove 30. By setting the limiting slider 29 and the limiting groove 30, the limiting slider 29 can limit the first scraping component 20, the second scraping component 21, the third scraping component 22 and the fourth scraping component 23 at the limiting groove 30, thereby preventing the first scraping component 20, the second scraping component 21, the third scraping component 22 and the fourth scraping component 23 from detaching from the mounting head body 12, and improving the structural stability of the entire device.

[0033] The working principle of this utility model is as follows: By turning on the switch of the servo motor 15, the output end of the servo motor 15 drives the lead screw 16 to start rotating. The lead screw 16 drives the limiting block 17, the quadrangular truncated pyramid 18 and the square block 19 to move downward along the inner wall of the mounting head body 12 at the limiting mounting groove 13. The quadrangular truncated pyramid 18 moves downward and squeezes the rollers 24 on the first scraping assembly 20, the second scraping assembly 21, the third scraping assembly 22 and the fourth scraping assembly 23 respectively. The rollers 24 drive the scraper 28 to move outward toward the outside of the mounting head body 12 through the rotating shaft 25, the mounting bracket 26 and the arc plate 27, thereby achieving the purpose of adjusting the scraping diameter.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A scraping device for oilfield well workover operations, comprising a rotary mounting head assembly (10), characterized in that: The inner wall of the rotary mounting head assembly (10) is provided with an automatically adjustable scraping mechanism (11). The rotary mounting head assembly (10) includes a mounting head body (12). A limiting mounting groove (13) is opened at the middle of the inner wall of the mounting head body (12). A limiting movable groove (14) is evenly opened at the middle of the outer wall of the mounting head body (12). Limiting grooves (30) are opened at the top and bottom of the inner wall of the mounting head body (12) at the limiting movable groove (14). The automatically adjustable scraping mechanism (11) includes a servo motor (15), and the top of the servo motor (15) is connected to the mounting head body (12). 2) The top of the inner wall is fixedly connected to the limiting installation groove (13). The output end of the servo motor (15) is fixedly installed with a lead screw (16). The bottom of the lead screw (16) is movably connected to the bottom of the inner wall of the mounting head body (12) at the limiting installation groove (13). The outer wall of the lead screw (16) is threadedly connected to a limiting block (17). The outer wall of the limiting block (17) is movably connected to the inner wall of the mounting head body (12) at the limiting installation groove (13). The bottom of the limiting block (17) is fixedly installed with a quadrangular frustum (18). The inner wall of the quadrangular frustum (18) is threadedly connected to the outer wall of the lead screw (16).

2. The scraping device for oilfield well workover operations according to claim 1, characterized in that: A block (19) is fixedly installed at the bottom of the quadrangular frustum (18), and the inner wall of the block (19) is threadedly connected to the outer wall of the lead screw (16). A first scraping assembly (20) is provided on the right side of the outer wall of the block (19).

3. The scraping device for oilfield well workover operations according to claim 2, characterized in that: The front end of the outer wall of the block (19) is provided with a second scraping component (21), and the structure of the second scraping component (21) is the same as that of the first scraping component (20).

4. The scraping device for oilfield well workover operations according to claim 2, characterized in that: A third scraping component (22) is provided on the left side of the outer wall of the block (19), and the structure of the third scraping component (22) is the same as that of the first scraping component (20).

5. The scraping device for oilfield well workover operations according to claim 2, characterized in that: The outer wall rear end of the block (19) is provided with a fourth scraping component (23), and the structure of the fourth scraping component (23) is the same as that of the first scraping component (20).

6. The scraping device for oilfield well workover operations according to claim 2, characterized in that: The first scraping assembly (20) includes a roller (24), and the outer wall of the roller (24) is in active contact with the outer walls of the block (19) and the truncated pyramid (18).

7. The scraping device for oilfield well workover operations according to claim 6, characterized in that: The inner wall of the roller (24) is movably mounted with a rotating shaft (25), the outer wall of the rotating shaft (25) is fixedly mounted with a mounting bracket (26), and the right side wall of the mounting bracket (26) is fixedly mounted with an arc-shaped plate (27).

8. The scraping device for oilfield well workover operations according to claim 7, characterized in that: A scraper (28) is fixedly installed on the right side wall of the arc plate (27), and the outer wall of the scraper (28) is movably connected to the inner wall of the mounting head body (12) at the limiting movable groove (14).

9. The scraping device for oilfield well workover operations according to claim 8, characterized in that: Limiting sliders (29) are fixedly installed on the top left side and bottom left side of the scraper (28), and the outer wall of the limiting slider (29) is movably connected to the inner wall of the mounting head body (12) at the limiting groove (30).

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