Anti-drag spring casing centralizer

Abstract

The utility model discloses a resistance reduction spring casing centralizer which comprises an inner centralizer body, clamping sleeves are fixed to the outer wall of the upper end of the inner centralizer body at equal angles, a flat spring is movably connected to the inner wall of each clamping sleeve, a base is fixedly arranged on the outer wall, on the side of each flat spring, of the inner centralizer body, and a rotary knob is movably connected to the inner wall of each base. A square rod is movably installed on the inner wall of the flat spring, a limiting mechanism is arranged at one end of the square rod, a support is fixedly connected to the other end of the square rod, and a roller is rotationally installed on the inner wall of the support. According to the anti-drag spring casing centralizer, a damaged spring assembly can be replaced conveniently, and therefore the use stability of the device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of spring centralizers, specifically a drag-reducing spring sleeve centralizer. Background Technology

[0002] A drag-reducing spring casing centralizer is a centralizer with externally mounted spring plates. The spring plates are generally made of high-strength and highly elastic metal materials. When the spring centralizer is inserted into the wellbore along with the casing, it deforms according to the inner wall of the wellbore, thereby providing centralizing force to the casing. Compared with traditional centralizers, spring centralizers have advantages such as low resistance and good applicability, which makes them widely available in the market.

[0003] However, existing drag-reducing spring sleeve centralizers have the following problems when in use:

[0004] Because the spring assembly is prone to damage during use, the device needs to be easy to replace damaged spring assemblies to ensure its effectiveness. However, the existing drag-reducing spring sleeve centralizer does not make it convenient to replace damaged spring assemblies, which can easily affect the stability of the device.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing drag-reducing spring sleeve centralizer. Utility Model Content

[0006] The purpose of this utility model is to provide a drag-reducing spring sleeve centralizer to solve the problem mentioned in the background art that existing drag-reducing spring sleeve centralizers are inconvenient to replace damaged spring components, which easily affects the stability of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drag-reducing spring sleeve centralizer, comprising an inner centralizer, wherein a sleeve is fixed at an equal angle to the upper outer wall of the inner centralizer, and a leaf spring is movably connected to the inner wall of the sleeve, and a base is fixedly provided on the outer wall of the inner centralizer on the side of the leaf spring, and a knob is movably connected to the inner wall of the base, a square rod is movably installed on the inner wall of the leaf spring, and a limit mechanism is provided at one end of the square rod, and a bracket is fixedly connected to the other end of the square rod, and a roller is rotatably installed on the inner wall of the bracket.

[0008] Preferably, the leaf spring and the ferrule are slidably connected.

[0009] Preferably, the leaf spring and the base are fitted together, and both the leaf spring and the base are threadedly connected to the knob.

[0010] Preferably, the square rod and the leaf spring are slidably arranged, and the leaf spring and the bracket are fitted together.

[0011] Preferably, the limiting mechanism includes a bolt and a cap, wherein the bolt is movably installed on the inner wall of the square rod, and the cap is fixedly provided on the end face of the bolt.

[0012] Preferably, the bolt and the square rod are threaded together, and the nut and the leaf spring are fitted together.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the drag-reducing spring sleeve centralizer makes it easy to replace the damaged spring assembly, thereby ensuring the stability of the device in use;

[0014] Rotating the knob disengages it from the leaf spring and base. Moving the leaf spring disengages it from the retaining sleeve, thus disassembling the damaged spring assembly. Moving the new bracket allows it to insert the square rod into the new leaf spring. Moving the new cap allows it to insert the retaining bolt into the square rod. Tightening the new cap ensures the retaining bolt is fully engaged in the square rod and the cap is in contact with the leaf spring, completing the installation of the new roller. The remaining rollers are installed in the same way, completing the assembly of the new spring assembly. Moving the new spring assembly allows the new leaf spring to be inserted into the retaining sleeve. Moving the new knob through the new leaf spring and inserting it into the base, then tightening the new knob completes the installation of the new leaf spring. The new spring assembly is now installed, making it easy to replace damaged spring assemblies and ensuring the stability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the orthographic section of the present invention;

[0016] Figure 2 This is a partial top view of the structure of this utility model;

[0017] Figure 3 This is a side view of the square rod structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the front section of the limiting mechanism of this utility model.

[0019] In the diagram: 1. Internal stabilizer; 2. Sleeve; 3. Leaf spring; 4. Base; 5. Knob; 6. Square rod; 7. Limiting mechanism; 701. Bolt; 702. Cap; 8. Bracket; 9. Roller. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a drag-reducing spring sleeve centralizer, including an inner centralizer 1, a sleeve 2, a leaf spring 3, a base 4, a knob 5, a square rod 6, a limiting mechanism 7, a bolt 701, a cap 702, a bracket 8, and a roller 9. The sleeve 2 is fixed at an equal angle to the upper outer wall of the inner centralizer 1, and the leaf spring 3 is movably connected to the inner wall of the sleeve 2. The base 4 is fixedly installed on the outer wall of the inner centralizer 1 on the side of the leaf spring 3, and the knob 5 is movably connected to the inner wall of the base 4. The square rod 6 is movably installed on the inner wall of the leaf spring 3, and the limiting mechanism 7 is provided at one end of the square rod 6. The bracket 8 is fixedly connected to the other end of the square rod 6, and the roller 9 is rotatably installed on the inner wall of the bracket 8.

[0022] The leaf spring 3 and the retaining sleeve 2 are slidably connected, which facilitates the movement of the leaf spring 3 relative to the retaining sleeve 2 for assembly and disassembly.

[0023] The leaf spring 3 and the base 4 are attached to each other, and both the leaf spring 3 and the base 4 are threadedly connected to the knob 5, which makes it easy for the user to rotate the knob 5 to disengage the knob 5 from the leaf spring 3 and the base 4, thereby making it convenient for the user to move and disassemble the leaf spring 3.

[0024] The square rod 6 and the leaf spring 3 are slidably arranged, and the leaf spring 3 and the bracket 8 are closely connected, so that when the user moves the bracket 8 to install or remove the roller 9, the bracket 8 drives the square rod 6 to slide relative to the leaf spring 3.

[0025] The limiting mechanism 7 includes a latch 701 and a cap 702. The latch 701 is movably installed on the inner wall of the square rod 6, and the cap 702 is fixedly provided on the end face of the latch 701, so as to limit the bracket 8 through the limiting mechanism 7, thereby ensuring the stability of the roller 9.

[0026] The bolt 701 is threadedly connected to the square rod 6, and the cap 702 is fitted with the leaf spring 3, which allows the user to move the cap 702 so that the cap 702 drives the bolt 701 to insert into the square rod 6. Thus, when the user tightens the cap 702, the cap 702 is close to the leaf spring 3 and the bolt 701 is deeply inserted into the square rod 6, thereby completing the positioning of the bracket 8 and the roller 9.

[0027] Working principle: When using this drag-reducing spring sleeve centralizer, firstly as follows... Figure 1-4As shown, the user installs the internal centralizer 1 on the pipeline. When the pipeline is inserted into the wellbore, the centralizer moves downward with the pipeline. At this time, the roller 9 moves in contact with the wellbore and rotates relative to the support 8, thereby reducing the resistance to the movement of the centralizer. Through the elastic support of the support 8 by the leaf spring 3, the roller 9 always stays in contact with the wellbore, thus providing a centralizing force for the pipeline. When the spring assembly on the centralizer is damaged and needs to be replaced, the user removes the centralizer. Then, the user rotates the knob 5 to disengage the knob 5 from the leaf spring 3 and the base 4. Next, the user moves the leaf spring 3 to disengage the leaf spring 3 from the retainer 2, thus completing the disassembly of the damaged spring assembly. Then, the user moves the new support 8 so that the support 8 drives the square rod 6 to insert the new leaf spring. In step 3, the user moves the new cap 702, causing it to drive the latch 701 into the square rod 6. The user then tightens the new cap 702, at which point the latch 701 penetrates deep into the square rod 6 and the cap 702 adheres to the leaf spring 3, thus completing the installation of the new roller 9. The remaining rollers 9 are installed similarly, completing the assembly of the new spring assembly. The user then moves the new spring assembly, causing the new leaf spring 3 to insert into the sleeve 2. Next, the user inserts the new knob 5 through the new leaf spring 3 into the base 4. The user then tightens the new knob 5, completing the installation of the new leaf spring 3. The new spring assembly is now installed. Therefore, the device facilitates the replacement of damaged spring assemblies, ensuring the stability of the device's operation.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drag-reducing spring sleeve centralizer, comprising an inner centralizer (1), characterized in that: The upper outer wall of the inner straightener (1) is fixed with a sleeve (2) at an equal angle, and the inner wall of the sleeve (2) is movably connected with a leaf spring (3). The outer wall of the inner straightener (1) on the side of the leaf spring (3) is fixed with a base (4), and the inner wall of the base (4) is movably connected with a knob (5). The inner wall of the leaf spring (3) is movably installed with a square rod (6), and one end of the square rod (6) is provided with a limit mechanism (7). The other end of the square rod (6) is fixedly connected with a bracket (8), and the inner wall of the bracket (8) is rotatably installed with a roller (9).

2. The drag-reducing spring sleeve centralizer according to claim 1, characterized in that: The leaf spring (3) and the sleeve (2) are slidably connected.

3. The drag-reducing spring sleeve centralizer according to claim 1, characterized in that: The leaf spring (3) and the base (4) are in contact with each other, and both the leaf spring (3) and the base (4) are threadedly connected to the knob (5).

4. The drag-reducing spring sleeve centralizer according to claim 1, characterized in that: The square rod (6) and the leaf spring (3) are slidably arranged, and the leaf spring (3) and the bracket (8) are fitted together.

5. The drag-reducing spring sleeve centralizer according to claim 1, characterized in that: The limiting mechanism (7) includes a bolt (701) and a cap (702), and the bolt (701) is movably installed on the inner wall of the square rod (6), and the cap (702) is fixedly provided on the end face of the bolt (701).

6. The drag-reducing spring sleeve centralizer according to claim 5, characterized in that: The bolt (701) and the square rod (6) are threaded together, and the nut (702) and the leaf spring (3) are fitted together.

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