Anti-corrosion sand control screen pipe for oilfield exploitation

Abstract

The utility model relates to the related technical field of sand control screen pipes, in particular to an anti-corrosion sand control screen pipe for oilfield exploitation, which comprises a shell pipe and a combination mechanism, and the combination mechanism is arranged on one side of the surface of the shell pipe. According to the anti-corrosion sand control screen pipe for oilfield exploitation, through the arrangement of a combined mechanism, when the anti-corrosion sand control screen pipe is normally used, an integrated groove is sealed through a sealing cover, a rotating gear is limited, then a shell pipe is installed on the device through an arranged threaded groove, and then normal screening of materials is ensured through filter screens at different positions; when the shell pipe needs to be cleaned, the sealing cover is taken out, the motor is connected with the rotating gear, then the motor is started, the motor drives the rotating gear to rotate through the output end of the motor, the rotating gear is meshed with the main gear ring, the main gear ring is driven to rotate synchronously, and then the first screening barrel and the second screening barrel are driven to rotate; the cleaning work is assisted.

Description

Technical Field

[0001] This utility model relates to the technical field of sand control screen pipes, and in particular to a corrosion-resistant sand control screen pipe used in oilfield development. Background Technology

[0002] Sand control screens are special pipes used in oil and gas well development. They are mainly used to filter sand particles around the well wall, preventing sand particles from entering the pipeline and damaging production equipment. Their structure usually consists of a base pipe, a filter layer, and a support layer. Through precision machining, they ensure good permeability and anti-clogging ability, while also possessing strong mechanical strength. They can adapt to complex downhole environments and ensure the long-term efficient operation of oil and gas wells. With the continuous development of technology, the requirements for sand control screens are becoming increasingly stringent. Therefore, there is a particular need for a corrosion-resistant sand control screen used in oilfield development.

[0003] However, existing anti-corrosion oilfields use sand screen pipes. Although the above-mentioned mechanism can clean the sand screen pipes through simple parts, the above-mentioned device only cleans the outer surface of the pipe and cannot effectively clean the device, thus affecting the service life of the device and reducing the collection efficiency.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN218062284U disclosing a sand-control screen pipe for corrosion-resistant oilfield applications. The patent describes a system comprising a scraper and a sand-control screen pipe. The sand-control screen pipe has a rotatable scraper on its side. One side of the scraper is connected to a fixing ring via a connecting rod. The fixing ring is located outside a rotating shaft. The rotating shaft is connected to the end of the sand-control screen pipe via rotation. A connecting shaft is located in the middle of one end of the rotating shaft, and the end of the rotating shaft is rotatably connected to an installation head. This utility model's sand-control screen pipe has a scraper on its outer side, which allows for the scraping of the outer side of the sand-control screen pipe. The system employs a scraping technique to clean the sand control screen without removing it from the well, making it convenient to use. A connector is located on one side of the scraper, connecting to one end of a connecting rod. The other end of the connecting rod connects to a connecting lug on one side of a fixing ring, which is mounted on a rotating shaft. One end of the rotating shaft has a connecting shaft, which can be connected to the motor output shaft via a transmission rod. While this mechanism cleans the sand control screen using simple parts, it only cleans the outer surface of the pipe, failing to effectively clean the device itself. This limits the device's lifespan and reduces data collection efficiency.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Utility Model Content

[0006] The purpose of this utility model is to provide a corrosion-resistant sand screen pipe for oilfield development, in order to solve the problem mentioned in the background art that although the existing corrosion-resistant sand screen pipes for oilfield development can clean the sand screen pipe through simple parts, the above-mentioned device only cleans the outer surface of the pipe and cannot effectively clean the device, thus affecting the service life of the device and reducing the collection efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant sand screen pipe for oilfield development, comprising an outer shell pipe and a combination mechanism, wherein the combination mechanism is provided on one side of the surface of the outer shell pipe;

[0008] The combined mechanism includes an integrated groove, a first sieve hole, a threaded groove, a first sliding groove, a second sliding groove, a main gear ring, a sealing cover, a first screening barrel, a second screening barrel, a rotating gear, a second sieve hole, a third sieve hole, a motor, and a filter screen. The integrated groove is formed inside the outer casing tube, the first sieve hole is formed on the surface of the outer casing tube, a threaded groove is formed on one side of the outer casing tube, a first sliding groove is formed on one side of the surface of the integrated groove, a second sliding groove is formed on one side of the surface of the integrated groove, a main gear ring is fitted inside the integrated groove, a sealing cover is threaded to one end of the integrated groove, a first screening barrel is fixedly connected to one side of the main gear ring, a second screening barrel is fixedly connected to one side of the main gear ring, a rotating gear meshes with the surface of the main gear ring, a second sieve hole is formed on the surface of the first screening barrel, a third sieve hole is formed on the surface of the second screening barrel, one side of the rotating gear is connected to the output end of the motor, and a filter screen is installed inside the second sieve hole.

[0009] Preferably, the first slide groove and the second slide groove are positioned opposite each other, and the second slide groove is located inside the first slide groove.

[0010] Preferably, the first screening barrel is fitted inside the first chute, and the second screening barrel is fitted inside the second chute.

[0011] Preferably, one side of the integrated groove extends through the outer casing tube, and the rotating gear is engaged inside the integrated groove.

[0012] Preferably, filter screens are also installed inside the first and third sieve holes, and the pore sizes of the filter screens on the first, second, and third sieve holes are different.

[0013] Preferably, the positions of the first, second, and third sieve holes are aligned, and the sizes of the first, second, and third sieve holes are consistent.

[0014] Preferably, the first sieve hole, the second sieve hole, and the third sieve hole are distributed at equal intervals on one side of their respective screening barrels and are distributed at equal angles around their respective screening barrels.

[0015] Preferably, the first screening barrel and the second screening barrel rotate synchronously with the main gear ring through a rotating gear and a motor, and the rotating gear and the main gear ring form a mutually rotating structure through the motor.

[0016] Preferably, one side of the sealing cover is threadedly connected to the rotating gear, and the main body of the motor is supported on the outer casing tube.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the anti-corrosion oilfield adopts a sand-proof screen pipe, and through the setting of the combined mechanism, the combined mechanism effectively improves the screening efficiency through the multi-layer filter screen set on the multi-layer barrel by simple parts cooperation. At the same time, during cleaning, the rotation of the screening barrel not only facilitates the work of workers, but also improves the cleaning efficiency and extends the service life of the device. Attached Figure Description

[0018] Figure 1 This is a side view of the appearance structure of this utility model;

[0019] Figure 2 This is a partially exploded cross-sectional view of the combined mechanism of this utility model;

[0020] Figure 3 This is an exploded cross-sectional view of the outer casing tube of this utility model;

[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This utility model Figure 2 Enlarged structural diagram at point B;

[0023] Figure 6 This utility model Figure 3 Enlarged structural diagram at point C.

[0024] In the diagram: 1. Outer shell tube; 2. Assembly mechanism; 201. Integrated groove; 202. First sieve hole; 203. Threaded groove; 204. First sliding groove; 205. Second sliding groove; 206. Main gear ring; 207. Sealing cover; 208. First screening barrel; 209. Second screening barrel; 210. Rotating gear; 211. Second sieve hole; 212. Third sieve hole; 213. Motor; 214. Filter screen. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-6 This utility model provides a technical solution: a corrosion-resistant sand screen pipe for oilfield development, including an outer shell pipe 1 and a combination mechanism 2, wherein the combination mechanism 2 is provided on one side of the surface of the outer shell pipe 1;

[0027] The combined mechanism 2 includes an integrated groove 201, a first screen hole 202, a threaded groove 203, a first sliding groove 204, a second sliding groove 205, a main gear ring 206, a sealing cover 207, a first screening barrel 208, a second screening barrel 209, a rotating gear 210, a second screen hole 211, a third screen hole 212, a motor 213, and a filter screen 214. The integrated groove 201 is formed inside the outer casing tube 1, the first screen hole 202 is formed on the surface of the outer casing tube 1, the threaded groove 203 is formed on one side of the outer casing tube 1, and the first sliding groove 204 is formed on one side of the surface of the integrated groove 201. A second groove 205 is formed on one side of the surface of the integrated groove 201. A main gear ring 206 is fitted inside the integrated groove 201. A sealing cap 207 is threaded to one end of the integrated groove 201. A first screening barrel 208 is fixedly connected to one side of the main gear ring 206, and a second screening barrel 209 is fixedly connected to one side of the main gear ring 206. A rotating gear 210 meshes with the surface of the main gear ring 206. A second screening hole 211 is formed on the surface of the first screening barrel 208, and a third screening hole 212 is formed on the surface of the second screening barrel 209. One side of the rotating gear 210 is connected to a motor 2. The output end of 13 is connected, and a filter screen 214 is installed inside the second sieve hole 211. Through the arrangement of the integrated groove 201, the first sieve hole 202, the threaded groove 203, the first sliding groove 204, the second sliding groove 205, the main gear ring 206, the sealing cover 207, the first screening barrel 208, the second screening barrel 209, the rotating gear 210, the second sieve hole 211, the third sieve hole 212, the motor 213, and the filter screen 214, during normal use, the integrated groove 201 is sealed by the sealing cover 207, and the rotating gear 210 is limited. Then, through the set... The threaded groove 203 installs the outer shell tube 1 onto the device. Then, the material is properly screened by the filter screens 214 at different positions. When it is necessary to clean the outer shell tube 1, the sealing cover 207 is removed, and the motor 213 is connected to the rotating gear 210. Then, the motor 213 is started. The motor 213 drives the rotating gear 210 to rotate through its output end. The rotating gear 210 meshes with the main gear ring 206, driving the main gear ring 206 to rotate synchronously, which in turn drives the first screening barrel 208 and the second screening barrel 209 to rotate. The rotational motion assists in the cleaning work.

[0028] Furthermore, the first chute 204 and the second chute 205 are positioned opposite each other, with the second chute 205 located inside the first chute 204. Through the arrangement of the first chute 204 and the second chute 205, the first chute 204 and the second chute 205 serve as the track for the screening barrel, providing stable support and guidance for the barrel's operation, optimizing the spatial layout, and ensuring the efficiency, accuracy, and maintainability of the screening operation. This is one of the key components of the device.

[0029] Furthermore, the first screening barrel 208 is fitted inside the first chute 204, and the second screening barrel 209 is fitted inside the second chute 205. Through the arrangement of the first screening barrel 208 and the second screening barrel 209, the first screening barrel 208 and the second screening barrel 209 cooperate in this mechanism to undertake the screening task of materials of different particle sizes. The first screening barrel 208 performs secondary screening, and the second screening barrel 209 performs finer screening, ensuring the efficiency, accuracy and continuity of the screening process. At the same time, the synchronous rotation of the two screening barrels and the grading screening structure improve the cleaning efficiency and enhance the performance of the overall screening system.

[0030] Furthermore, one side of the integrated trough 201 extends through the outer shell tube 1, and the rotating gear 210 is fitted inside the integrated trough 201. Through the setting of the integrated trough 201, the integrated trough 201 plays multiple roles in the mechanism, including installation, fixing, support and protection. It is the core structure of the entire device. It not only provides a stable operating space, but also ensures the efficient operation of the screening system and transmission system by integrating various components, while optimizing the compactness and functional synergy of the device.

[0031] Furthermore, filter screens 214 are also installed inside the first screen hole 202 and the third screen hole 212. The pore sizes of the filter screens 214 on the first screen hole 202, the second screen hole 211 and the third screen hole 212 are different. Through the setting of the filter screens 214, the filter screens 214 can separate the material step by step in different screens through multi-stage screening. The first screening barrel 208, the second screening barrel 209 and the filter screens 214 on each screen hole work together to make the screening process more efficient. Each layer of screen can effectively process materials within a certain particle size range, thereby improving the overall processing efficiency.

[0032] Furthermore, the positions of the first screen hole 202, the second screen hole 211, and the third screen hole 212 are relatively aligned, and their sizes match. Through the arrangement of the first screen hole 202, the second screen hole 211, and the third screen hole 212, these three screen holes are key components for the device to achieve multi-stage screening. By cooperating with the filter screen 214 through reasonable aperture, they complete the step-by-step screening and classification of materials of different particle sizes, while optimizing the material flow path and the continuity of equipment operation. The three screen holes have clear division of labor and close cooperation, ensuring the high efficiency and accuracy of the entire screening device.

[0033] Furthermore, the first sieve hole 202, the second sieve hole 211 and the third sieve hole 212 are distributed at equal intervals on one side of their respective screening barrels and are distributed at equal angles around their respective screening barrels.

[0034] Furthermore, the first screening barrel 208 and the second screening barrel 209 rotate synchronously with the main gear ring 206 through the rotating gear 210 and the motor 213. The rotating gear 210 forms a mutually rotating structure with the main gear ring 206 through the motor 213. The rotating gear 210 is a key component connecting the motor 213 and the main gear ring 206, responsible for transmitting the rotational power output by the motor 213 to the main gear ring 206. Through meshing transmission, the rotating gear 210 converts the high-speed rotation of the motor 213 into a rotational speed suitable for the operation of the main gear ring 206, thereby driving the screening barrels to rotate synchronously.

[0035] Furthermore, one side of the sealing cover 207 is threadedly connected to the rotating gear 210, and the main body of the motor 213 is supported on the outer casing tube 1. Through the setting of the sealing cover 207 and the motor 213, the sealing cover 207 is fitted into one end of the integrated groove 201, which plays a sealing role and prevents the material from leaking from the opening of the outer casing tube 1 during the screening process, ensuring the cleanliness and efficiency of the screening operation. At the same time, by limiting the rotating gear 210, the rotating gear 210 is fixed, preventing the screen holes from being misaligned due to the rotation of the rotating gear 210. The motor 213 is the core power source of the device. It transmits the rotational power to the rotating gear 210 through the output shaft, which further drives the main gear ring 206 and the screening barrel to rotate, ensuring cleaning efficiency.

[0036] Working principle: During normal use, the integrated groove 201 is sealed by the sealing cover 207, which limits the rotation gear 210. Then, the outer shell tube 1 is installed on the device through the threaded groove 203. After that, the material is properly screened by the filter screens 214 at different positions. When it is necessary to clean the outer shell tube 1, the sealing cover 207 is removed, and the motor 213 is connected to the rotation gear 210. Then, the motor 213 is started, and the motor 213 drives the rotation gear 210 to rotate through its output end. The rotation gear 210 meshes with the main gear ring 206, driving the main gear ring 206 to rotate synchronously, which in turn drives the first screening barrel 208 and the second screening barrel 209 to rotate. The rotational motion assists in the cleaning work.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An erosion resistant sand control screen for use in oilfield operations, comprising an outer casing pipe (1) and an assembly mechanism (2), characterised in that: The surface side of the shell pipe (1) is provided with a combination mechanism (2); The combination mechanism (2) comprises an integrated groove (201), a first sieve hole (202), a threaded groove (203), a first sliding groove (204), a second sliding groove (205), a main tooth ring (206), a sealing cover (207), a first screening barrel (208), a second screening barrel (209), a rotating gear (210), a second sieve hole (211), a third sieve hole (212), a motor (213) and a filter screen (214), the inside of the shell pipe (1) is provided with an integrated groove (201), the surface of the shell pipe (1) is provided with a first sieve hole (202), one side of the shell pipe (1) is provided with a threaded groove (203), one side of the surface of the integrated groove (201) is provided with a first sliding groove (204), one side of the surface of the integrated groove (201) is provided with a second sliding groove (205), the inside of the integrated groove (201) is embedded with a main tooth ring (206), one end of the integrated groove (201) is threadedly connected with a sealing cover (207), one side of the main tooth ring (206) is fixedly connected with a first screening barrel (208), one side of the main tooth ring (206) is fixedly connected with a second screening barrel (209), the surface of the main tooth ring (206) is engaged with a rotating gear (210), the surface of the first screening barrel (208) is provided with a second sieve hole (211), the surface of the second screening barrel (209) is provided with a third sieve hole (212), one side of the rotating gear (210) is connected with the output end of a motor (213), the inside of the second sieve hole (211) is mounted with a filter screen (214).

2. An erosion control sand screen for use in oilfield operations according to claim 1, characterized in that: The positions of the first sliding groove (204) and the second sliding groove (205) are opposite, and the second sliding groove (205) is located inside the first sliding groove (204).

3. An erosion control sand screen for use in oilfield operations according to claim 1, characterized in that: The first screening barrel (208) is embedded inside the first sliding groove (204), and the second screening barrel (209) is embedded inside the second sliding groove (205).

4. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: One side of the integrated groove (201) penetrates the shell pipe (1), and the rotating gear (210) is embedded inside the integrated groove (201).

5. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: Filter screens (214) are also mounted inside the first sieve hole (202) and the third sieve hole (212), and the pore diameters of the filter screens (214) on the first sieve hole (202), the second sieve hole (211) and the third sieve hole (212) are different.

6. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: The positions of the first sieve hole (202), the second sieve hole (211) and the third sieve hole (212) are opposite, and the sizes of the first sieve hole (202), the second sieve hole (211) and the third sieve hole (212) are consistent.

7. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: The first sieve hole (202), the second sieve hole (211) and the third sieve hole (212) are distributed at equal intervals on one side of the respective screening barrels and at equal angles around the respective screening barrels.

8. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: The first screening barrel (208) and the second screening barrel (209) are synchronously rotated with the main tooth ring (206) through a rotating gear (210) and a motor (213), and the rotating gear (210) and the main tooth ring (206) constitute a mutual rotating structure through the motor (213).

9. An erosion control sand screen for use in oilfield operations according to claim 1, characterized by: One side of the sealing cover (207) is threadedly connected with the rotating gear (210), and the main body of the motor (213) is supported on the shell pipe (1).

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