Anti-scale device for oil-water well

Abstract

The utility model discloses an anti-scale device for an oil-water well, which relates to the technical field of oilfield exploitation and comprises a barrel, the left end of the barrel is fixedly connected with a communication port, the right end of the barrel is fixedly connected with a flange ring, the right end of the flange ring is lapped with an external barrel, and the external barrel is provided with a water inlet and a water outlet. And the inner wall of the flange ring is in threaded connection with fixing bolts in a circular array mode, the outer walls of the fixing bolts are in threaded connection with the left portion of the externally-connected cylinder, and the right portion of the communicating opening is fixedly connected with a fixing ring. According to the anti-scaling device for the oil-water well, the nut is taken down, then the anti-scaling blade can be pulled, the anti-scaling blade drives the spring and the positioning block to move synchronously, the outer wall of the positioning block slides on the inner wall of the rotating shaft, the positioning block slides towards the inner wall of the anti-scaling blade, and the spring shrinks; and when the inner walls of the anti-scale blades are not in contact with the outer wall of the rotating shaft any more, the taken-down anti-scale blades can be replaced or maintained, and the effect of being convenient to disassemble is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field exploitation, in particular to an anti-scaling device for oil and water wells. Background Art

[0002] With the continuous deepening of oil field development, the production time of oil fields is constantly extended, and the water content of oil wells is constantly rising. Due to the high mineralization of produced water in oil fields, there are different degrees of scaling on the wall of oil well pipes. Specifically, during the production process of oil wells, when the fluid passes through various parts of the production pipe string, the flow section of the fluid changes, and throttling will occur at the section, causing the temperature and pressure of the fluid to change, the fluid balance system to be destroyed, and the solubility of scale-forming ions to change. When the solubility decreases, carbonates and sulfates will precipitate to form scale. In addition, the well flow contains a certain amount of impurity particles, which can act as crystal nuclei to cause carbonates to precipitate crystals and scale under low supersaturation conditions, affecting the normal production of production pipes. Scaling will not only cause scale jamming and leakage, but also cause corrosion and blockage of key components in severe cases, directly affecting the efficiency of the pump, reducing the production time rate, causing an increase in the number of oil well pump inspections, and increasing the cost of crude oil extraction. Therefore, oil and water well anti-scaling devices are needed.

[0003] For example, Chinese patent document CN206545499U discloses a downhole anti-scaling device, including an anti-scaling pipe, an anti-scaling body in the anti-scaling pipe and a pipe joint; one end of the anti-scaling pipe is an open end, and the pipe joint is installed at the open end; the other end of the anti-scaling pipe is a closed end, and the anti-scaling pipe has pipe holes distributed on the outer wall near the closed end; the anti-scaling body includes a plurality of anti-scaling sheets, a pin, and a connecting shaft, and the anti-scaling sheet is a circular cake-shaped object, and at least three fan-shaped blades extend outward from the edge of the circular cake-shaped object, and a through hole is provided in the middle of the anti-scaling sheet; all anti-scaling sheets are sleeved on the pin through the through hole, and are fixed by the pin hole on the connecting shaft through the pin, and two adjacent anti-scaling sheets are separated by the connecting shaft; the fan-shaped blades of all anti-scaling sheets are arranged in a spiral, and the matching mode of the anti-scaling sheet and the anti-scaling pipe is a transition fit or a clearance fit. The processing capacity of the utility model can reach 20.46m3 / h, and the scale inhibition rate of the generated current size of 15-30uA is greater than 98%, and the anti-scaling effect is more obvious.

[0004] The existing technology has the following problems:

[0005] The prior art anti-scaling device for oil and water wells is not convenient for disassembling the anti-scaling sheet, which makes it troublesome to replace or clean the anti-scaling sheet later, reducing the practicality of the device. At the same time, the prior art anti-scaling device only uses the anti-scaling sheet to prevent the crude oil from being scaled, which reduces the practicality of the device. Utility Model Content

[0006] The utility model provides an anti-scaling device for oil and water wells to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A scale prevention device for oil and water wells, comprising a cylinder, a connecting port being fixedly connected to the left end of the cylinder, a flange ring being fixedly connected to the right end of the cylinder, an external cylinder being overlapped at the right end of the flange ring, the inner wall of the flange ring being threadedly connected to fixing bolts in a circular array, the outer wall of the fixing bolts being threadedly connected to the left portion of the external cylinder, a fixing ring being fixedly connected to the right portion of the connecting port, a scale prevention mechanism being rotatably connected to the inner wall of the fixing ring, an auxiliary mechanism being slidably connected to the inner wall of the flange ring, the scale prevention mechanism comprising a rotating shaft, the left portion of the rotating shaft being rotatably connected to the inner wall of the fixing ring, and the auxiliary mechanism comprising a grid plate, the outer wall of the grid plate being slidably connected to the inner wall of the flange ring.

[0009] Preferably, a spiral blade is fixedly connected to the outer wall of the rotating shaft, and a limiting plate is fixedly connected to the right part of the rotating shaft.

[0010] Preferably, the right portion of the rotating shaft is threadedly connected with a nut in a linear array, the right portion of the rotating shaft is slidably connected with an anti-scaling blade, and the outer wall of the anti-scaling blade overlaps the outer wall of the nut.

[0011] Preferably, the inner wall of the anti-scaling blade is fixedly connected with four springs in a circular array, the bottom end of the spring is fixedly connected with a positioning block, and the outer wall of the positioning block is slidably connected with the inner wall of the anti-scaling blade.

[0012] Preferably, the outer wall of the positioning block is engaged with the inner wall of the rotating shaft, and the outer shape of the positioning block is cylindrical.

[0013] Preferably: the outer wall of the grid plate is fixedly connected with a connecting block in a circular array, the outer wall of the connecting block is slidably connected to the inner wall of the flange ring, the outer wall of the connecting block is threadedly connected with a bolt, and the outer wall of the bolt is threadedly connected to the inner wall of the flange ring.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] 1. The utility model provides an anti-scaling device for oil and water wells. By removing the nut, the anti-scaling blade can be pulled, so that the anti-scaling blade drives the spring and the positioning block to move synchronously, so that the outer wall of the positioning block slides on the inner wall of the rotating shaft, and the positioning block slides toward the inner wall of the anti-scaling blade to shrink the spring. When the inner wall of the anti-scaling blade is no longer in contact with the outer wall of the rotating shaft, the removed anti-scaling blade can be replaced or maintained, which has the effect of facilitating disassembly.

[0016] 2. The utility model provides an anti-scaling device for oil and water wells. After the crude oil passes through the anti-scaling blades, it passes through the grid plate again. The grid plate limits the flow rate of the crude oil so that the crude oil can maintain a sufficient contact time with the anti-scaling blades, thereby increasing the anti-scaling effect of the anti-scaling blades. During this process, the grid plate will not affect the circulation of the crude oil, thereby achieving an anti-scaling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the main view of the utility model;

[0018] Figure 2 It is a schematic diagram of the cutaway structure of the main view of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the anti-scaling mechanism of the utility model;

[0020] Figure 4 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 It is a structural schematic diagram of the auxiliary mechanism of the utility model.

[0022] In the figure: 1. Cylinder; 11. Connecting port; 12. Flange ring; 13. External cylinder; 14. Fixing bolt; 15. Fixing ring; 2. Anti-scaling mechanism; 21. Rotating shaft; 22. Spiral blade; 23. Limiting plate; 24. Anti-scaling blade; 25. Spring; 26. Positioning block; 27. Nut; 3. Auxiliary mechanism; 31. Grid plate; 32. Connecting block; 33. Bolt. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-Figure 3 As shown, an anti-scaling device for oil and water wells includes a cylinder 1, a connecting port 11 is fixedly connected to the left end of the cylinder 1, a flange ring 12 is fixedly connected to the right end of the cylinder 1, an external cylinder 13 is overlapped at the right end of the flange ring 12, the inner wall of the flange ring 12 is threadedly connected with fixing bolts 14 in a circular array, the outer wall of the fixing bolts 14 is threadedly connected to the left part of the external cylinder 13, a fixing ring 15 is fixedly connected to the right part of the connecting port 11, an anti-scaling mechanism 2 is rotatably connected to the inner wall of the fixing ring 15, an auxiliary mechanism 3 is slidably connected to the inner wall of the flange ring 12, the anti-scaling mechanism 2 includes a rotating shaft 21, the left part of the rotating shaft 21 is rotatably connected to the inner wall of the fixing ring 15, the auxiliary mechanism 3 includes a grid plate 31, and the outer wall of the grid plate 31 is slidably connected to the inner wall of the flange ring 12.

[0025] The anti-scaling mechanism 2 and the auxiliary mechanism 3 cooperate with each other to remove scale from the circulating crude oil, thereby preventing scaling on the inner wall of the subsequent external cylinder 13.

[0026] like Figure 2-Figure 3 As shown, the outer wall of the rotating shaft 21 is fixedly connected with a spiral blade 22, the right part of the rotating shaft 21 is fixedly connected with a limiting plate 23, the right part of the rotating shaft 21 is threadedly connected with a nut 27 in a linear array, the right part of the rotating shaft 21 is slidably connected with an anti-scaling blade 24, and the outer wall of the anti-scaling blade 24 overlaps the outer wall of the nut 27.

[0027] The driving mechanism drives the rotating shaft 21 to rotate, so that the rotating shaft 21 drives the spiral blades 22 to rotate, and the spiral blades 22 transport the crude oil, so that the flow mode of the crude oil changes from laminar flow to turbulent flow, thereby making the crude oil contact with the outer wall of the anti-scaling blade 24, ensuring the contact area between the crude oil and the outer wall of the anti-scaling blade 24, thereby improving the anti-scaling effect of the anti-scaling blade 24.

[0028] like Figure 2-Figure 4 As shown, the inner wall of the anti-scaling blade 24 is fixedly connected with four springs 25 in a circular array, the bottom end of the spring 25 is fixedly connected with a positioning block 26, the outer wall of the positioning block 26 is slidably connected to the inner wall of the anti-scaling blade 24, the outer wall of the positioning block 26 is clamped with the inner wall of the rotating shaft 21, and the outer shape of the positioning block 26 is cylindrical.

[0029] By removing the nut 27, the anti-scaling blade 24 can be pulled, so that the anti-scaling blade 24 drives the spring 25 and the positioning block 26 to move synchronously, so that the outer wall of the positioning block 26 slides on the inner wall of the rotating shaft 21, and the positioning block 26 slides toward the inner wall of the anti-scaling blade 24, so that the spring 25 contracts. When the inner wall of the anti-scaling blade 24 no longer contacts the outer wall of the rotating shaft 21, the removed anti-scaling blade 24 can be replaced or maintained, which makes disassembly easy.

[0030] like Figure 2 , Figure 5 As shown, the outer wall of the grid plate 31 is fixedly connected to a connecting block 32 in a circular array, the outer wall of the connecting block 32 is slidably connected to the inner wall of the flange ring 12, the outer wall of the connecting block 32 is threadedly connected to a bolt 33, and the outer wall of the bolt 33 is threadedly connected to the inner wall of the flange ring 12.

[0031] After the crude oil passes through the anti-scaling blades 24, it passes through the grid plate 31 again. The grid plate 31 limits the flow rate of the crude oil so that the crude oil can maintain a sufficient contact time with the anti-scaling blades 24, thereby increasing the anti-scaling effect of the anti-scaling blades 24. During this process, the grid plate 31 will not affect the circulation of the crude oil, thereby achieving an anti-scaling effect.

[0032] The working principle of the utility model is as follows: when in use, the flange ring 12 fixedly connected to the right end of the cylinder 1 is connected to the left end of the external cylinder 13 through the fixing bolt 14, and then the crude oil is input into the cylinder 1 through the connecting port 11, and at the same time, the driving mechanism drives the rotating shaft 21 to rotate, so that the rotating shaft 21 drives the spiral blade 22 to rotate, and the spiral blade 22 transports the crude oil, so that the flow mode of the crude oil changes from laminar flow to turbulent flow, thereby making the crude oil contact with the outer wall of the anti-scaling blade 24, ensuring the contact area between the crude oil and the outer wall of the anti-scaling blade 24, thereby improving the anti-scaling effect of the anti-scaling blade 24, after the anti-scaling by the anti-scaling blade 24, the crude oil passes through the grid plate 31 again, and the grid plate 31 limits the flow rate of the crude oil, so that the crude oil can maintain a sufficient contact time with the anti-scaling blade 24, thereby increasing the anti-scaling effect of the anti-scaling blade 24, and in this process, the grid plate 31 will not affect the circulation of the crude oil, and plays an anti-scaling role. When the cam 32 is in a state of being out of engagement with the flange 12, the cam 32 is then released and the cam 32 is released, and the cam 32 is released and the cam 32 is released, the cam 32 is released and the cam 32 is released.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An anti-scaling device for oil and water wells, comprising a cylinder (1), characterized in that: The left end of the cylinder (1) is fixedly connected to a connecting port (11), the right end of the cylinder (1) is fixedly connected to a flange ring (12), the right end of the flange ring (12) is overlapped with an external cylinder (13), the inner wall of the flange ring (12) is threadedly connected to fixing bolts (14) in a circular array, the outer wall of the fixing bolts (14) is threadedly connected to the left part of the external cylinder (13), the right part of the connecting port (11) is fixedly connected to a fixing ring (15), the inner wall of the fixing ring (15) is rotatably connected to an anti-scaling mechanism (2), the inner wall of the flange ring (12) is slidably connected to an auxiliary mechanism (3), the anti-scaling mechanism (2) comprises a rotating shaft (21), the left part of the rotating shaft (21) is rotatably connected to the inner wall of the fixing ring (15), the auxiliary mechanism (3) comprises a grid plate (31), the outer wall of the grid plate (31) is slidably connected to the inner wall of the flange ring (12).

2. The anti-scaling device for oil and water wells according to claim 1, characterized in that: The outer wall of the rotating shaft (21) is fixedly connected with a spiral blade (22), and the right part of the rotating shaft (21) is fixedly connected with a limiting plate (23).

3. The anti-scaling device for oil and water wells according to claim 1, characterized in that: The right part of the rotating shaft (21) is threadedly connected to a nut (27) in a linear array, and the right part of the rotating shaft (21) is slidably connected to an anti-scaling blade (24), and the outer wall of the anti-scaling blade (24) overlaps the outer wall of the nut (27).

4. The anti-scaling device for oil and water wells according to claim 3, characterized in that: The inner wall of the anti-scaling blade (24) is fixedly connected to four springs (25) in a circular array, the bottom end of the spring (25) is fixedly connected to a positioning block (26), and the outer wall of the positioning block (26) is slidably connected to the inner wall of the anti-scaling blade (24).

5. The anti-scaling device for oil and water wells according to claim 4, characterized in that: The outer wall of the positioning block (26) is clamped with the inner wall of the rotating shaft (21), and the outer shape of the positioning block (26) is cylindrical.

6. The anti-scaling device for oil and water wells according to claim 1, characterized in that: The outer wall of the grid plate (31) is fixedly connected to a connecting block (32) in a circular array, the outer wall of the connecting block (32) is slidably connected to the inner wall of the flange ring (12), the outer wall of the connecting block (32) is threadedly connected to a bolt (33), and the outer wall of the bolt (33) is threadedly connected to the inner wall of the flange ring (12).

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