Combined cyclone sand washer for petroleum industry

Abstract

The utility model relates to sand washer technical field, concretely is a kind of combined cyclone equal-diameter sand washer for petroleum industry, comprising: combined cyclone equal-diameter sand washer pipe body, the both ends of cyclone equal-diameter sand washer pipe body inner wall are respectively fixedly connected with positioning snap ring and positioning ring; Wear-resistant lining, the both ends of wear-resistant lining outer surface are respectively provided with L-shaped slot and positioning recess, the lower end of wear-resistant lining is provided with counterbore;Connecting bolt, the connecting bolt is located in counterbore, and one end of connecting bolt is screwed with positioning ring. The utility model is provided with wear-resistant lining of convenient and quick replacement installation in the inner wall wear-resistant section of equal-diameter sand washer pipe body, can greatly improve the wear resistance and service life of equal-diameter sand washer pipe body, avoid the construction difficulty of overall replacement pipeline in complex downhole environment, need to consume a large amount of manpower, material resources and time problem.

Description

Technical Field

[0001] This utility model relates to the field of sand flushing technology, specifically a combined vortex equal diameter sand flushing device for the petroleum industry. Background Technology

[0002] Currently, conventional sand flushing tools, such as pen-tip sand flushers, have many drawbacks. Their flushing methods are relatively limited, making it difficult to effectively flush the wellbore through swirling flow, and failing to ensure good wellbore throughput. In sand flushing operations in highly deviated wells and horizontal sections, if forward circulation is used, the wellbore trajectory and laminar flow effects make it difficult to completely flush up the sediment at the bottom of the wellbore, and the flushed sand particles are prone to secondary sedimentation, leading to sand blockage. If reverse circulation is used, the impact force of the flushing fluid is significantly reduced, often resulting in no progress when encountering dense, cemented sand surfaces. Furthermore, in low- and medium-pressure reservoirs, especially in low-pressure wells with staged stimulation and multiple perforations, the leakage of flushing fluid is extremely serious, which not only affects construction efficiency but also causes a certain degree of contamination to the oil reservoir.

[0003] Although some oilfields have made improvements and innovations to conventional pen-tip sand flushers, some problems still remain unresolved. For example, some sand flushers have narrow sand-carrying fluid channels, which are easily blocked by large sand particles or rubber debris falling into the well, preventing normal sand flushing; some sand flushers have too many seals, resulting in poor flowability; and some sand flushers have nozzles that are externally rotating parts, which are prone to jamming during use, causing them to malfunction.

[0004] During sand flushing operations, the pipes of the sand flushing equipment face severe wear challenges. Because the large amount of sand particles carried in the flushing fluid have high hardness and impact force, they continuously scour the inner wall of the pipe during high-speed flow, leading to severe wear. Especially in oil wells that frequently undergo sand flushing operations, the service life of the pipes is greatly shortened, requiring frequent pipe replacements. This not only increases production costs but also affects the normal production operations of the oil well.

[0005] To address the issue of pipe wear, some existing sand flushing devices utilize wear-resistant pipe materials. However, while using a single pipe made entirely of wear-resistant materials improves wear resistance to some extent, in practical use, when a section of the pipe experiences severe wear, the entire pipe needs to be replaced, undoubtedly increasing replacement costs and operational complexity. Moreover, in some complex downhole environments, replacing the entire pipe is challenging and requires significant manpower, resources, and time. Therefore, we propose a combined vortex equal-diameter sand flushing device for the petroleum industry. Utility Model Content

[0006] The purpose of this invention is to provide a combined vortex equal-diameter sand flusher for the petroleum industry, featuring easily installable and replaceable liners. When the liners wear out, only the liners need to be replaced, eliminating the need to replace the entire pipeline. This significantly reduces maintenance costs and operational difficulty, improves the efficiency and economy of sand flushing operations, and better meets the actual needs of downhole sand flushing operations in the petroleum industry. It solves the problem that in actual use, when a part of the pipeline suffers severe wear, the entire pipeline needs to be replaced, which undoubtedly increases replacement costs and operational difficulty. Moreover, in some complex downhole environments, replacing the entire pipeline is very difficult and requires a significant amount of manpower, resources, and time.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a combined cyclone equal-diameter sand flushing device for the petroleum industry, comprising:

[0008] The combined vortex equal diameter sand flushing tube body has a positioning retaining ring and a positioning support ring fixedly connected to both ends of the inner wall of the combined vortex equal diameter sand flushing tube body;

[0009] A wear-resistant liner, wherein L-shaped slots and positioning recesses are respectively provided at both ends of the outer surface of the wear-resistant liner, and a countersunk hole is provided at the lower end of the wear-resistant liner;

[0010] A connecting bolt is located inside a countersunk hole, and one end of the connecting bolt is threadedly connected to a positioning support ring.

[0011] Preferably, the L-shaped slot is adapted to the positioning ring, and the positioning ring is engaged in the L-shaped slot.

[0012] Preferably, there are multiple wear-resistant liners, and the outer wall of the wear-resistant liner is adapted to the inner wall of the combined vortex equal diameter sand flushing tube.

[0013] Preferably, the positioning ring is adapted to the positioning recess, and the positioning ring is located within the positioning recess.

[0014] Preferably, the outer surface of the combined vortex equal diameter sand flushing tube is coated with a first protective layer, and the first protective layer is a tungsten carbide coating.

[0015] Preferably, a second protective layer is coated on the outer side of the first protective layer, and the material of the second protective layer is an aluminum oxide coating.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention improves the wear resistance and service life of the equal-diameter sand flushing pipe by installing a wear-resistant liner plate on the wear-resistant section of the inner wall of the equal-diameter sand flushing pipe that is easy to replace and install quickly. This avoids the problem that the construction of replacing the entire pipe is difficult in complex downhole environments and requires a lot of manpower, material resources and time. Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the second protective layer structure of this utility model.

[0021] In the figure: 1. Combined vortex equal diameter sand flushing tube body; 101. Positioning retaining ring; 102. Positioning support ring; 2. Wear-resistant liner; 201. L-shaped slot; 202. Positioning recess; 203. Countersunk hole; 3. Connecting bolt; 301. First protective layer; 302. Second protective layer. Detailed Implementation

[0022] 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.

[0023] The components of the combined cyclone equal diameter sand flusher tube body 1, positioning retaining ring 101, positioning support ring 102, wear-resistant liner 2, L-shaped slot 201, positioning recess 202, countersunk hole 203, connecting bolt 3, first protective layer 301 and second protective layer 302 in this application are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0024] Example 1

[0025] Please see Figures 1-3 As shown, this utility model provides a technical solution: a combined cyclone equal-diameter sand flushing device for the petroleum industry, comprising:

[0026] The combined vortex equal diameter sand flushing tube 1 has a positioning ring 101 and a positioning support ring 102 fixedly connected to both ends of the inner wall of the combined vortex equal diameter sand flushing tube 1.

[0027] The wear-resistant liner 2 has an L-shaped slot 201 and a positioning recess 202 at both ends of its outer surface, and a countersunk hole 203 at its lower end.

[0028] Connecting bolt 3, which is located in the countersunk hole 203, and one end of the connecting bolt 3 is threadedly connected to the positioning ring 102.

[0029] The L-shaped slot 201 is adapted to the positioning ring 101, and the positioning ring 101 is engaged in the L-shaped slot 201. There are multiple wear-resistant liners 2, and the outer wall of the wear-resistant liner 2 is adapted to the inner wall of the combined vortex equal diameter sand flushing tube 1. The positioning support ring 102 is adapted to the positioning recess 202, and the positioning support ring 102 is located in the positioning recess 202.

[0030] This technical solution: By setting the combined vortex equal-diameter sand flushing tube 1, the sand-carrying fluid channel of the sand flushing device is kept consistent, avoiding blockage by large sand particles or rubber debris falling into the well, which would prevent normal sand flushing. This causes the wear-resistant liner 2 to enter the combined vortex equal-diameter sand flushing tube 1, bringing the outer surface of the wear-resistant liner 2 close to the inner wall of the tube. Simultaneously, the positioning retaining ring 101 enters the L-shaped slot 201. As the wear-resistant liner 2 moves downwards, the positioning retaining ring 101 enters the L-shaped slot 201, and at the same time, the positioning recess 202 engages with the positioning support ring 1. 02. Next, insert the connecting bolt 3 into the countersunk hole 203 at the lower end of the corresponding wear-resistant liner 2. After rotating the connecting bolt 3, it can connect with the threaded hole on the inner surface of the positioning ring 102 (the inner surface of the positioning ring 102 has multiple threaded holes corresponding to the wear-resistant liner 2), thereby enabling the wear-resistant liner 2 to be installed quickly. Conversely, if some wear-resistant liners 2 are damaged, the connecting bolt 3 can be unscrewed, and then the corresponding wear-resistant liner 2 can be moved upward, so that the positioning ring 101 can be disengaged from the L-shaped slot 201. The operation is simple and convenient.

[0031] It should be noted that the combined vortex equal diameter sand flushing tube body 1, wear-resistant liner 2, connecting bolts 3, etc. used in this paper can all be purchased directly from the market. At the same time, the connection method and electrical connection relationship of each component adopt mature conventional methods in existing technology, so they will not be described in detail here.

[0032] Example 2

[0033] Based on Embodiment 1, this utility model is as follows: Figures 1-3 As shown, the outer surface of the combined vortex equal diameter sand flushing tube 1 is coated with a first protective layer 301, and the first protective layer 301 is a tungsten carbide coating. The outer side of the first protective layer 301 is coated with a second protective layer 302, and the material of the second protective layer 302 is an aluminum oxide coating.

[0034] This technical solution: By setting the first protective layer 301 and the second protective layer 302, the corrosion resistance and wear resistance of the inner and outer surfaces of the combined vortex equal diameter sand flushing tube 1 can be effectively improved, and its surface has extremely high hardness, which can extend the service life of the combined vortex equal diameter sand flushing tube 1.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A combined cyclone equal-diameter sand flushing device for the petroleum industry, characterized in that, include: The combined vortex equal diameter sand flushing tube body (1) has a positioning ring (101) and a positioning support ring (102) fixedly connected to both ends of the inner wall of the combined vortex equal diameter sand flushing tube body (1); Wear-resistant liner (2), with L-shaped slots (201) and positioning recesses (202) respectively provided at both ends of the outer surface of the wear-resistant liner (2), and a countersunk hole (203) provided at the lower end of the wear-resistant liner (2); A connecting bolt (3) is located inside a countersunk hole (203), and one end of the connecting bolt (3) is threadedly connected to a positioning ring (102).

2. The combined cyclone equal-diameter sand flushing device for the petroleum industry according to claim 1, characterized in that: The L-shaped slot (201) is adapted to the positioning ring (101), and the positioning ring (101) is engaged in the L-shaped slot (201).

3. A combined cyclone equal-diameter sand flushing device for the petroleum industry according to claim 1, characterized in that: The number of wear-resistant liners (2) is multiple, and the outer wall of the wear-resistant liners (2) is adapted to the inner wall of the combined vortex equal diameter sand flushing tube (1).

4. A combined cyclone equal-diameter sand flushing device for the petroleum industry according to claim 1, characterized in that: The positioning ring (102) is adapted to the positioning recess (202), and the positioning ring (102) is located inside the positioning recess (202).

5. A combined cyclone equal-diameter sand flushing device for the petroleum industry according to claim 1, characterized in that: The outer surface of the combined vortex equal diameter sand flushing tube (1) is coated with a first protective layer (301), and the first protective layer (301) is a tungsten carbide coating.

6. A combined cyclone equal-diameter sand flushing device for the petroleum industry according to claim 5, characterized in that: The outer side of the first protective layer (301) is coated with a second protective layer (302), and the material of the second protective layer (302) is an aluminum oxide coating.

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