Anti-corrosion and anti-scale device for oil pipe

Abstract

The utility model discloses an oil pipe corrosion and scale prevention device which comprises a sleeve arranged on the outer side of an oil pipe, the sleeve is coaxial with the oil pipe, the two ends of the sleeve are provided with an external thread and an internal thread respectively, the external thread is in threaded fit with the internal thread, one end of the sleeve is provided with a water inlet hole, and the other end of the sleeve is provided with a water outlet hole. A fixing frame is arranged in the middle of the sleeve, a solid slow-release scale inhibitor is fixed to the inner wall of the fixing frame, a plurality of filter plates are arranged on one side of the fixing frame along the axis of the oil pipe and located between the fixing frame and the water outlet hole, and a sacrificial anode is fixed to the position, located on one side of the water inlet hole, of the inner wall of the sleeve through a supporting frame. The sacrificial anode is attached to the outer wall of the oil pipe; according to the utility model, the filter plate is arranged to perform multiple blocking on falling blocks of the solid slow-release scale inhibitor, so that the solid slow-release scale inhibitor can flow out from the water outlet hole after being fully dissolved, the solid slow-release scale inhibitor can be fully used, and the waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pipe anticorrosion and scale prevention technical field especially relates to a kind of oil pipe anticorrosion and scale prevention device. BACKGROUND

[0002] In the oilfield production process, corrosion, scaling and other conditions occur in oilfield downhole system equipment, not only shortening the service life of oilfield production equipment, but also increasing the cost of oilfield production.

[0003] Through the retrieval, the patent with Chinese patent publication No.CN214115731U discloses an oil pipe anticorrosion and scale prevention and wax prevention device, which comprises a sacrificial anode assembly connected with the oil pipe. The sacrificial anode assembly comprises a conversion nipple and a head section. The outer periphery of the two end portions of the conversion nipple is connected with an oil pipe coupling. The head section comprises a shoe and a first sacrificial anode. The first sacrificial anode is connected to the outer periphery of the oil pipe and is provided with a water inlet and a water outlet. The water inlet is obliquely arranged along the center line of the oil pipe. The angle between the center line of the water inlet and the center line of the oil pipe is 45-60°. The water outlet is obliquely arranged along the center line of the oil pipe. The angle between the center line of the water outlet and the center line of the oil pipe is 45-60°.

[0004] The patent sets the number of water outlets to be twice the number of water inlets, which can effectively ensure that the resistance of the water body in the annular cavity is small after entering the inside of the sacrificial anode. The solid corrosion and scale inhibition wax inhibitor and the anode material are uniformly dissolved. However, during the dissolution process, the solid corrosion and scale inhibition wax inhibitor may fall off in chunks. These falling chunks are not completely decomposed and are discharged from the water outlet, causing waste. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides an oil pipe anticorrosion and scale prevention device.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] An oil pipe anticorrosion and scale prevention device comprises a sleeve arranged outside the oil pipe. The sleeve is coaxial with the oil pipe. The two ends of the sleeve are provided with external threads and internal threads, respectively. The external threads are threadedly matched with the internal threads. One end of the sleeve is provided with a water inlet hole. The other end of the sleeve is provided with a water outlet hole. A fixed frame is arranged in the middle of the sleeve. A solid slow-release scale inhibitor is fixed to the inner wall of the fixed frame. A plurality of filter plates are arranged on one side of the fixed frame along the axis of the oil pipe. The filter plates are located between the fixed frame and the water outlet hole. A sacrificial anode is fixed to the inner wall of the sleeve on the side of the water inlet hole through a support frame. The sacrificial anode is attached to the outer wall of the oil pipe. A driving assembly is arranged between the sacrificial anode and the fixed frame. A plurality of stirring frames are rotatably connected to the side wall of the shell.

[0008] As a further scheme of the utility model: the driving assembly includes guide ring one and rotating frame, the guide ring one is fixed to the inner wall of sleeve, the rotating frame is connected with guide ring one through connecting frame, and the lateral wall of rotating frame is attached to the outer wall of oil pipe.

[0009] As a further scheme of the utility model: the inner wall of rotating frame is rotationally matched with rotating ring, a plurality of paddles are fixed on the outer wall of rotating ring in annular array, one side of paddle is arc surface, and the other side of paddle is plane.

[0010] As a further scheme of the utility model: the one side of rotating ring is connected with connecting plate, the inner wall of sleeve is connected with shell, the shell is located between fixed frame and filter plate, the other end of connecting plate is inserted into shell and is slidingly matched with shell.

[0011] As a further scheme of the utility model: the outer wall of connecting plate is fixed with driving bevel gear, a plurality of driven bevel gears are transmissionally engaged on one side of driving bevel gear, and the rotating shaft of stirring frame is connected with driven bevel gear.

[0012] As a further scheme of the utility model: the end side of shell close to filter plate is provided with guide ring two, and the outer wall of one side close to sacrificial anode of guide ring one and guide ring two is inclined surface inclined to the axis of oil pipe.

[0013] Compared with the prior art, the utility model provides a kind of oil pipe anticorrosion and scale inhibitor, with following beneficial effects:

[0014] 1. The utility model discloses a filter plate is arranged, and solid slow-release scale inhibitor drop block is prevented repeatedly, so that solid slow-release scale inhibitor can flow out from water outlet after being dissolved sufficiently, so that solid slow-release scale inhibitor can be used fully, and waste is reduced.

[0015] 2. The utility model discloses a driving assembly and stirring frame are arranged, can make scale inhibitor dissolved in water and water mix fully, so that slow-release agent is evenly distributed, avoids that corrosion inhibitor is directly washed away by water flow in pipe after being dissolved, and is not dissolved sufficiently in water flow, causes uneven application.

[0016] 3. The utility model discloses guide ring one and guide ring two are arranged, can make the flow rate of water flow at paddle speed up, speed up the rotating speed of paddle 14, and the flow rate of water flow at stirring frame slows down, so that the stirring time of stirring frame to water increases.

[0017] The part not involved in the device is same as or can be realized by the prior art, and the utility model has simple structure and convenient operation. DRAWINGS

[0018] Fig. 1This is a schematic diagram of the overall structure of an oil pipe anti-corrosion and anti-scaling device proposed in this utility model;

[0019] Fig. 2 This is a schematic diagram of the internal structure of an oil pipe anti-corrosion and anti-scaling device proposed in this utility model;

[0020] Fig. 3 This is a schematic diagram of the structure of a drive assembly for an oil pipe corrosion and scale inhibitor proposed in this utility model;

[0021] Fig. 4 This is a partial structural diagram of an oil pipe anti-corrosion and anti-scaling device proposed in this utility model.

[0022] In the diagram: 1. Oil pipe; 2. Casing; 3. External thread; 4. Water inlet; 5. Water outlet; 6. Internal thread; 7. Fixing frame; 8. Support frame; 9. Sacrificial anode; 10. Drive assembly; 11. Filter plate; 12. Flow guide ring one; 13. Rotating frame; 14. Paddle; 15. Rotating ring; 16. Connecting plate; 17. Housing; 18. Drive bevel gear; 19. Stirring frame; 20. Driven bevel gear; 21. Flow guide ring two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0025] Example 1: An oil pipe corrosion and scale inhibitor, such as Figs. 1-2 As shown, the sleeve 2 is disposed outside the oil pipe 1. The sleeve 2 is coaxial with the oil pipe 1. The two ends of the sleeve 2 are respectively provided with external threads 3 and internal threads 6. The external threads 3 and internal threads 6 are threadedly engaged. One end of the sleeve 2 is provided with a water inlet 4, and the other end of the sleeve 2 is provided with a water outlet 5. A sacrificial anode 9 is fixed on the inner wall of the sleeve 2 on one side of the water inlet 4 by a support frame 8. The sacrificial anode 9 is attached to the outer wall of the oil pipe 1. A fixing frame 7 is provided in the middle of the sleeve 2. A solid slow-release scale inhibitor is fixed on the inner wall of the fixing frame 7. Multiple filter plates 11 are provided on one side of the fixing frame 7. The multiple filter plates 11 are arranged along the axis of the oil pipe 1. The filter plates 11 are located between the fixing frame 7 and the water outlet 5.

[0026] Water flows into the space between the casing 2 and the oil pipe 1 through the inlet hole 4, melting the solid slow-release scale inhibitor fixed in the fixing bracket 7 and flowing towards the internal thread 6. When the solid slow-release scale inhibitor falls off in chunks, the filter plate 11 blocks the falling chunks of solid slow-release scale inhibitor in multiple ways, so that the solid slow-release scale inhibitor can be fully dissolved before flowing out from the outlet hole 5, so that the solid slow-release scale inhibitor can be fully used and waste can be reduced.

[0027] By setting up a filter plate 11, the solid slow-release scale inhibitor is blocked in multiple ways, so that the solid slow-release scale inhibitor can be fully dissolved before flowing out from the water outlet 5, so that the solid slow-release scale inhibitor can be fully used and waste can be reduced.

[0028] Example 2: An oil pipe corrosion and scale inhibitor. This example is based on Example 1, with the following improvements: Figs. 2-4 As shown, a drive assembly 10 is provided between the sacrificial anode 9 and the fixing frame 7. The drive assembly 10 includes a guide ring 12 and a rotating frame 13. The guide ring 12 is fixed to the inner wall of the casing 2. The rotating frame 13 is connected to the guide ring 12 through a connecting frame, and the side wall of the rotating frame 13 is in contact with the outer wall of the oil pipe 1. A rotating ring 15 is rotatably fitted on the inner wall of the rotating frame 13. Multiple blades 14 are fixed in a ring array on the outer wall of the rotating ring 15. One side of the blades 14 is an arc-shaped surface, and the other side of the blades 14 is a flat surface. A connecting plate 16 is connected to one side of the rotating ring 15, and a shell is connected to the inner wall of the casing 2. 17. The housing 17 is located between the fixed frame 7 and the filter plate 11. The other end of the connecting plate 16 is inserted into the housing 17 and slides in cooperation with the housing 17. An active bevel gear 18 is fixed on the outer wall of the connecting plate 16. Multiple driven bevel gears 20 are driven and meshed on one side of the active bevel gear 18. Multiple stirring racks 19 are rotatably connected to the side wall of the housing 17. The rotating shaft of the stirring rack 19 is connected to the driven bevel gear 20. A second guide ring 21 is provided on the side of the housing 17 near the filter plate 11. The outer walls of the first guide ring 12 and the second guide ring 21 near the sacrificial anode 9 are both inclined surfaces that are inclined towards the axis of the oil pipe 1.

[0029] When water flows in the sleeve 2, the water flows through the blade 14. The pressure difference on both sides of the blade 14 drives the blade 14 to rotate the rotating ring 15. The rotating ring 15 is driven to rotate through the connecting plate 16. Through the transmission between the driving bevel gear 18 and the driven bevel gear 20, the stirring frame 19 is driven to rotate, which stirs the water flow and makes the scale inhibitor dissolved in the water fully mixed with the water, so that the scale inhibitor can be evenly distributed. At the same time, the guide ring 12 can accelerate the flow rate of the water at the blade 14, and the guide ring 21 slows down the flow rate of the water at the stirring frame 19, so that the stirring time of the stirring frame 19 on the water is increased.

[0030] By incorporating the drive assembly 10 and the stirring rack 19, the scale inhibitor dissolved in the water can be fully mixed with the water, ensuring uniform distribution of the slow-release agent. This prevents the corrosion inhibitor from being directly washed away by the water flow in the pipe after dissolving, thus avoiding uneven application of the agent due to insufficient dissolution in the water flow.

[0031] By setting up guide ring 12 and guide ring 21, the flow velocity of water at the blade 14 can be increased, the rotation speed of the blade 14 can be increased, the flow velocity of water at the mixing frame 19 can be reduced, and the mixing time of water by the mixing frame 19 can be increased.

[0032] Working principle: Water flows into the space between the casing 2 and the oil pipe 1 through the inlet hole 4, melting the solid slow-release scale inhibitor fixed in the fixing frame 7 and flowing towards the internal thread 6. When the solid slow-release scale inhibitor detaches in chunks, the filter plate 11 provides multiple layers of protection, ensuring that the solid slow-release scale inhibitor is fully dissolved before flowing out from the outlet hole 5, thus maximizing its use and reducing waste. When water flows in the casing 2, the water flows through the impeller 14, and the pressure difference on both sides of the impeller 14... The drive blade 14 drives the rotating ring 15 to rotate, and drives the drive bevel gear 18 to rotate through the connecting plate 16. Through the transmission between the drive bevel gear 18 and the driven bevel gear 20, the agitator 19 is driven to rotate, which agitates the water flow and makes the scale inhibitor dissolved in the water fully mixed with the water, so that the scale inhibitor can be evenly distributed. At the same time, the guide ring 12 can accelerate the flow rate of the water at the blade 14, and the guide ring 21 slows down the flow rate of the water at the agitator 19, thus increasing the agitation time of the agitator 19 on the water.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pipe corrosion and scale prevention device, comprising a sleeve (2) disposed outside the pipe (1), characterized in that, The casing (2) is coaxial with the oil pipe (1). External threads (3) and internal threads (6) are respectively provided at both ends of the casing (2). The external threads (3) and internal threads (6) are threaded together. A water inlet (4) is provided at one end of the casing (2), and a water outlet (5) is provided at the other end. A fixing frame (7) is provided in the middle of the casing (2). A solid slow-release scale inhibitor is fixed to the inner wall of the fixing frame (7). Multiple filter plates (11) are provided on one side of the fixing frame (7). 11) The filter plate (11) is arranged along the axis of the oil pipe (1) and is located between the fixed frame (7) and the water outlet (5). The inner wall of the sleeve (2) is fixed with a sacrificial anode (9) on the side of the water inlet (4) by a support frame (8). The sacrificial anode (9) is attached to the outer wall of the oil pipe (1). A drive assembly (10) is provided between the sacrificial anode (9) and the fixed frame (7). The inner wall of the sleeve (2) is connected to a shell (17). Multiple stirring racks (19) are rotatably connected to the side wall of the shell (17).

2. The oil pipe anti-corrosion and anti-scaling device according to claim 1, characterized in that, The drive assembly (10) includes a flow guide ring (12) and a rotating frame (13). The flow guide ring (12) is fixed to the inner wall of the sleeve (2). The rotating frame (13) is connected to the flow guide ring (12) through a connecting frame, and the side wall of the rotating frame (13) is in contact with the outer wall of the oil pipe (1).

3. The oil pipe corrosion and scale inhibitor according to claim 2, characterized in that, The inner wall of the rotating frame (13) is fitted with a rotating ring (15), and the outer wall of the rotating ring (15) is fixed with a ring array of multiple blades (14). One side of the blade (14) is an arc surface, and the other side of the blade (14) is a plane.

4. The oil pipe corrosion and scale inhibitor according to claim 3, characterized in that, The rotating ring (15) is connected to a connecting plate (16) on one side. The housing (17) is located between the fixing frame (7) and the filter plate (11). The other end of the connecting plate (16) is inserted into the housing (17) and slides into the housing (17).

5. The oil pipe corrosion and scale inhibitor according to claim 4, characterized in that, The outer wall of the connecting plate (16) is fixed with an active bevel gear (18), and a plurality of driven bevel gears (20) are driven and meshed on one side of the active bevel gear (18). The rotating shaft of the stirring rack (19) is connected to the driven bevel gears (20).

6. The oil pipe corrosion and scale inhibitor according to claim 4, characterized in that, The housing (17) is provided with a second guide ring (21) on the side near the filter plate (11). The outer walls of the first guide ring (12) and the second guide ring (21) on the side near the sacrificial anode (9) are both inclined surfaces that are inclined toward the axis of the oil pipe (1).

Images