Oilfield water injection filtering device convenient to disassemble and assemble

Abstract

The utility model discloses an oil field water injection filtering device convenient to disassemble and assemble, which comprises an outer shell, a threaded ring is rotatably arranged at one end of the outer shell, a water inlet is arranged at one end of the outer shell close to the threaded ring, the water inlet is in threaded connection with the threaded ring, and a first sealing gasket is arranged between the outer shell and the water inlet. A water injection pipe is arranged at the end, away from the water inlet, of the outer shell and is in socket connection with the outer shell, the outer surface of the water injection pipe is tightly attached to the inner surface of the outer shell, a clamping structure is arranged between the water injection pipe and the outer shell, a dirt storage bin is fixedly formed in the outer side of the end, close to the water injection pipe, of the outer shell, and a sealing cover is installed on the outer surface of one end of the dirt storage bin in a threaded mode. The annular clamping hoop is adopted and matched with the wedge-shaped block, clamping can be firmer through matching of the clamping hoop and the wedge-shaped block, the stability of the device is greatly improved, and using is safer.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil field water injection devices and relates to an oil field water injection filtering device which is easy to disassemble and assemble. Background Art

[0002] With the development and production of the country, and the increase of the population, more and more energy is needed for development, and oil is one of them. During the development and collection of oil, the oil in the oil field is pumped out, the oil layer is continuously consumed, and the pressure in the oil field will also drop. A large amount of crude oil in the oil field is degassed, and the viscosity increases, making it difficult to be pumped out. In order to ensure or restore the pressure of the underground oil field, the oil field needs to be injected with water, and the content of dirt such as gravel and sand in the water needs to be reduced as much as possible. However, most of the existing filter devices are screwed together through threads, and it takes several turns to connect the device to the water pipe. The use of tools for installation in a small space is very limited and inconvenient for disassembly and assembly.

[0003] The text of the existing patent number CN207520720U discloses a high-pressure water injection wellhead filter device, which can effectively snap into the card slot through the setting of the top block and the setting of the spring, ensuring that the first shell and the second shell are more convenient to disassemble and install. However, when the internal water pressure is too high, this setting may have the risk of breaking, posing a safety hazard. Utility Model Content

[0004] The utility model aims to provide an oilfield water injection filter device which is easy to disassemble and assemble, so as to solve the problems that the existing filter device is inconvenient to disassemble and assemble, and the clamping is unsafe.

[0005] The technical solution adopted by the utility model is that the oilfield water injection filtering device which is easy to disassemble and assemble comprises an outer shell, a threaded ring is rotatably installed at one end of the outer shell, a water inlet is arranged at one end of the outer shell close to the threaded ring, the water inlet and the threaded ring are threadedly connected, a first sealing gasket is arranged between the outer shell and the water inlet, an injection pipe is arranged at one end of the outer shell away from the water inlet, the injection pipe is connected to the outer shell with a socket connection, the outer surface of the injection pipe is tightly attached to the inner surface of the outer shell, a clamping structure is arranged between the water injection pipe and the outer shell, a dirt storage bin is fixedly opened on the outer side of one end of the outer shell close to the injection pipe, and a sealing cover is threadedly installed on the outer surface of one end of the dirt storage bin.

[0006] The utility model is also characterized in that:

[0007] The edge of the thread ring close to one side of the outer shell is buckled inward, and one side of the outer shell where the thread ring is arranged is expanded outward. The thread ring can be fastened to the outer shell to prevent the thread ring from falling off the outer shell.

[0008] The clamping structure comprises a clamp, the inner side of which is fixedly connected with a wedge block, the side of the wedge block close to the water injection pipe is inclined, and there are several wedge blocks.

[0009] A plurality of slide grooves are provided at one end of the outer shell body close to the water injection pipe, the positions of the slide grooves correspond to the positions of the wedge blocks one by one, the outer surface of the wedge blocks fits the inner surface of the slide grooves, and the wedge blocks penetrate the outer shell body through the slide grooves.

[0010] A clamping block is arranged on the outer surface of one end of the water injection pipe close to the outer shell, and the side of the clamping block close to the outer shell is inclined. The position of the clamping block corresponds to the position of the wedge block one by one, and the clamping block can be engaged with the wedge block.

[0011] A bayonet is fixedly installed on one side of the inner part of the outer shell near the water inlet. The bayonet has a conical opening, and the diameter is contracted on the side near the water injection pipe. A fixing ring is threadedly installed between the bayonet and the end of the outer shell near the water inlet. A plug is slidably connected to the fixing ring on the side near the water injection pipe. The plug fits the inner surface of the bayonet, and the plug and the outer shell are concentrically designed. A spring is arranged between the fixing ring and the plug.

[0012] A paddle is rotatably mounted inside the outer shell, and the paddle is arranged between the water injection pipe and the bayonet.

[0013] A brush plate is fixedly installed on the side of the paddle close to the dirt storage bin, and a filter screen is clamped and installed on the side of the brush plate close to the water injection pipe. The side surface of one end of the filter screen is in contact with the side surface of the brush plate, and a groove is provided on the outer surface of one end of the filter screen, and an opening is provided on the side of the filter screen close to the dirt storage bin.

[0014] A long strip protrusion is fixedly arranged between the blade and the water injection pipe in the outer shell, and the long strip protrusion is located between the brush plate and the clamp. The long strip protrusion in the outer shell is engaged with the groove of the filter screen, and a second sealing gasket is arranged between the filter screen and the water injection pipe.

[0015] The beneficial effects of the utility model are:

[0016] 1. When installing the outer shell, you only need to fit the outer shell with the water inlet, and then tighten the threaded ring to fix the outer shell on one side of the water inlet. Then, insert the water injection pipe directly into one side of the outer shell, insert the clamp into the outer shell along the slide groove, and push the clamp out through the movement of the clamp, so that the clamp and the clamp are engaged, which is convenient for installing the outer shell. When disassembly is required, you only need to push the clamp open to separate the clamp from the clamp, so that the water injection pipe can be pulled out, which is convenient for disassembly and assembly of the outer shell;

[0017] 2. When water is injected into the outer shell through the water injection pipe, the water will be filtered through the filter, and the stones and dirt filtered out will fall down along the opening of the filter, so that the stones and other impurities fall into the dirt storage bin to collect the dirt. After a period of time, the sealing cover can be unscrewed to discharge the dirt in the dirt storage bin;

[0018] 3. When water flows through the outer shell, it will push the blades to rotate, and the rotation of the blades will drive the brush plate to rotate. Through the contact between the brush plate and the filter, the brush plate rotates to brush the filter, so that the filter is always kept clean, so that the water can always pass through at the maximum flow rate, and the filter is automatically cleaned by the flow of water.

[0019] 4. The present application adopts an annular clamp in combination with a wedge block. The cooperation between the clamp and the wedge block can make the clamping more secure, greatly improve the stability of the device, and make it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front view structure of the oil field water injection filter device which is easy to disassemble and assemble according to the utility model;

[0021] Figure 2 This is a front cross-sectional structural diagram of the oilfield water injection filter device that is easy to disassemble and assemble according to the utility model;

[0022] Figure 3 This is a schematic diagram of the cutaway three-dimensional structure of the outer shell and the slideway of the oil field water injection filter device which is easy to disassemble and assemble according to the utility model;

[0023] Figure 4 The utility model is an oil field water injection filter device which is easy to disassemble and assemble Figure 2 Schematic diagram of the cross-section structure at point B;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the water injection pipe and the clamping block of the oil field water injection filter device which is easy to disassemble and assemble according to the utility model;

[0025] Figure 6 The utility model is an oil field water injection filter device which is easy to disassemble and assemble Figure 1 Schematic diagram of the cross-section structure at point A in the middle;

[0026] Figure 7 The utility model is a schematic diagram of the three-dimensional structure of the filter screen of the oil field water injection filter device which is easy to disassemble and assemble.

[0027] In the figure: 1. outer shell; 2. threaded ring; 3. water inlet; 4. water injection pipe; 5. dirt storage bin; 6. slide; 7. block; 8. clamp; 9. filter; 10. paddle; 11. brush plate; 12. fixing ring; 13. plug; 14. bayonet; 15. spring; 16. sealing cover; 17. first sealing gasket; 18. wedge block; 19. second sealing gasket. DETAILED DESCRIPTION

[0028] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0029] Example 1

[0030] like Figure 1As shown, the utility model is an oilfield water injection and filtering device which is easy to disassemble and assemble, comprising an outer shell 1, a threaded ring 2 is rotatably installed at one end of the outer shell 1, a water inlet 3 is arranged at one end of the outer shell 1 close to the threaded ring 2, the water inlet 3 is threadedly connected to the threaded ring 2, a first sealing gasket 17 is arranged between the outer shell 1 and the water inlet 3, an injection pipe 4 is arranged at one end of the outer shell 1 away from the water inlet 3, the diameter of the injection pipe 4 is smaller than the diameter of the outer shell 1, and the outer shell 1 and the injection pipe 4 are concentrically designed, the injection pipe 4 is connected to the outer shell 1 with a socket, the outer surface of the injection pipe 4 is tightly attached to the inner surface of the outer shell 1, a clamping structure is arranged between the injection pipe 4 and the outer shell 1, a dirt storage bin 5 is fixedly opened on the outer side of one end of the outer shell 1 close to the injection pipe 4, and a sealing cover 16 is threadedly installed on the outer surface of one end of the dirt storage bin 5, stones and dirt brought into the outer shell 1 can be collected through the dirt storage bin 5, and the sealing cover 16 can be conveniently opened to discharge the dirt.

[0031] like Figure 2 As shown, the edge of the thread ring 2 close to the outer shell 1 is inwardly buckled, and the outer shell 1 is provided with a side of the thread ring 2 expanding outward, and the thread ring 2 can be fastened to the outer shell 1 to prevent the thread ring 2 from falling off the outer shell 1. Figure 3 As shown, the clamping structure includes a clamp 8, and a wedge block 18 is fixedly connected to the inner side of the clamp 8. The wedge block 18 is inclined near the water injection pipe 4, and there are several wedge blocks 18. Figure 4 As shown, a plurality of chutes 6 are provided at one end of the outer shell 1 close to the water injection pipe 4. The positions of the chutes 6 correspond to the positions of the wedge blocks 18 one by one. The outer surface of the wedge blocks 18 fits with the inner surface of the chutes 6. The wedge blocks 18 pass through the outer shell 1 through the chutes 6.

[0032] like Figure 5 As shown, a clamping block 7 is provided on the outer surface of the water injection pipe 4 near one end of the outer shell 1. The side of the clamping block 7 near the outer shell 1 is inclined. The position of the clamping block 7 corresponds to the position of the wedge block 18 one by one, and the clamping block 7 can be engaged with the wedge block 18.

[0033] Example 2

[0034] The oilfield water injection filter device provided in Example 1, which is easy to disassemble and assemble, is further provided with a filter device, specifically:

[0035] A bayonet 14 is fixedly installed on one side of the outer shell 1 near the water inlet 3. The bayonet 14 has a conical opening, and the diameter of the bayonet 14 is contracted on the side near the water injection pipe 4. A fixing ring 12 is threadedly installed between the end of the outer shell 1 near the water inlet 3 and the bayonet 14. A plug 13 is slidably connected to the side of the fixing ring 12 near the water injection pipe 4. The plug 13 fits the inner surface of the bayonet 14, and the plug 13 and the outer shell 1 are concentrically designed. A spring 15 is arranged between the fixing ring 12 and the plug 13. When water flows into the outer shell 1 through the water inlet 3, the plug 13 will be pushed back by the elastic force of the spring 15 and the thrust of the water flow, so that the plug 13 moves along the direction of the fixing ring 12, and the plug 13 and the bayonet 14 are engaged to prevent water from flowing back.

[0036] The outer shell 1 is provided with a paddle 10 which is rotatably mounted therein. The paddle 10 is arranged between the water injection pipe 4 and the bayonet 14. A brush plate 11 is fixedly mounted on one side of the paddle 10 close to the dirt storage bin 5. The paddle 10 and the brush plate 11 can be used to clean the filtered dirt. Figure 6 As shown, a filter screen 9 is mounted on the brush plate 11 close to the water injection pipe 4, and one end side surface of the filter screen 9 is in contact with the side surface of the brush plate 11. Water is injected into the outer shell 1 through the water injection pipe 4, and the paddle 10 is driven by the water flow to rotate, so that the brush plate 11 rotates accordingly. The filter screen 9 is brushed by the rotation of the brush plate 11, so that the filter screen 9 is kept clean and unobstructed at all times, and the water flow passing through maintains the flow rate.

[0037] like Figure 7 As shown, a groove is provided on the outer surface of one end of the filter screen 9, an opening is provided on the side of the filter screen 9 close to the dirt storage bin 5, a long strip protrusion is fixedly provided between the paddle 10 and the water injection pipe 4 in the outer shell 1, and the long strip protrusion is located between the brush plate 11 and the clamp 8, the long strip protrusion in the outer shell 1 is engaged with the groove of the filter screen 9, and a second sealing gasket 19 is provided between the filter screen 9 and the water injection pipe 4.

[0038] Example 3

[0039] The installation and disassembly steps of the oilfield water injection filter device which is easy to disassemble and assemble are as follows:

[0040] Installation steps: align the outer shell 1 with the water inlet 3, and seal the outer shell 1 with the water inlet 3 by tightening the rotating thread ring 2 and cooperating with the first sealing gasket 17, so that the outer shell 1 will not rotate when tightening during installation. Then, the water injection pipe 4 can be inserted into the outer shell 1, and the block 7 can be moved along the slide groove 6, so that the inclined surface of the block 7 can fit with the inclined surface of the wedge block 18, and the clamp 8 can be directly pushed open to allow the block 7 to pass, so that the block 7 can be engaged with the wedge block 18, and at the same time, the second sealing gasket 19 can be used to seal the water injection pipe 4 and the outer shell 1.

[0041] Disassembly steps: When replacing the filter 9, the clamp 8 can be removed from the outer shell 1, so that the wedge block 18 and the clamping block 7 are disengaged, the water injection pipe 4 is taken out from the outer shell 1, and the damaged filter 9 is taken out from the outer shell 1. After that, the filter 9 can be directly inserted into the outer shell 1, and the opening of the side surface of the filter 9 is facing the dirt storage bin 5 through the engagement of the long strip protrusion in the outer shell 1 with the groove of the filter 9.

Claims

1. An oilfield water injection filter device that is easy to disassemble and assemble, characterized in that: The utility model comprises an outer shell (1), one end of which is rotatably mounted with a threaded ring (2), an end of the outer shell (1) close to the threaded ring (2) is provided with a water inlet (3), the water inlet (3) and the threaded ring (2) are threadedly connected, a first sealing gasket (17) is provided between the outer shell (1) and the water inlet (3), an end of the outer shell (1) away from the water inlet (3) is provided with a water injection pipe (4), the water injection pipe (4) is connected to the outer shell (1) in a socket-type manner, the outer surface of the water injection pipe (4) is closely attached to the inner surface of the outer shell (1), a clamping structure is provided between the water injection pipe (4) and the outer shell (1), a dirt storage bin (5) is fixedly provided on the outer side of the end of the outer shell (1) close to the water injection pipe (4), and a sealing cover (16) is threadedly mounted on the outer surface of one end of the dirt storage bin (5).

2. The oilfield water injection filter device that is easy to disassemble and assemble according to claim 1 is characterized in that: The edge of the threaded ring (2) close to one side of the outer shell (1) is inwardly buckled, and the outer shell (1) is provided with one side of the threaded ring (2) expanding outwardly. The threaded ring (2) can be fastened to the outer shell (1) to prevent the threaded ring (2) from falling off the outer shell (1).

3. The oilfield water injection filter device that is easy to disassemble and assemble according to claim 2 is characterized in that: The clamping structure comprises a clamp (8), the inner side of which is fixedly connected with a wedge block (18), the side of the wedge block (18) close to the water injection pipe (4) is inclined, and there are a plurality of wedge blocks (18).

4. The oilfield water injection filter device that is easy to disassemble and assemble according to claim 3 is characterized in that: A plurality of slide grooves (6) are provided at one end of the outer shell (1) close to the water injection pipe (4); the positions of the slide grooves (6) correspond to the positions of the wedge blocks (18) one by one; the outer surface of the wedge blocks (18) fits with the inner surface of the slide grooves (6); and the wedge blocks (18) pass through the outer shell (1) through the slide grooves (6).

5. The oilfield water injection filter device that is easy to disassemble and assemble according to claim 4 is characterized in that: A clamping block (7) is provided on the outer surface of one end of the water injection pipe (4) close to the outer shell (1); the side of the clamping block (7) close to the outer shell (1) is inclined; the position of the clamping block (7) corresponds to the position of the wedge block (18) one by one; and the clamping block (7) can be engaged with the wedge block (18).

6. The oilfield water injection filter device that is easy to disassemble and assemble according to claim 1 is characterized in that: A bayonet (14) is fixedly installed on one side of the outer shell (1) near the water inlet (3); the bayonet (14) is provided with a conical opening, and the diameter of the bayonet (14) is contracted on the side near the water injection pipe (4); a fixing ring (12) is threadedly installed between the end of the outer shell (1) near the water inlet (3) and the bayonet (14); a plug (13) is slidably connected to the side of the fixing ring (12) near the water injection pipe (4); the plug (13) is fitted with the inner surface of the bayonet (14), and the plug (13) and the outer shell (1) are concentrically designed; a spring (15) is provided between the fixing ring (12) and the plug (13).

7. The easily disassembled oilfield water injection filtering device according to claim 6, characterized in that: A paddle (10) is rotatably mounted inside the outer shell (1), and the paddle (10) is arranged between the water injection pipe (4) and the bayonet (14).

8. The easily disassembled oilfield water injection filtering device according to claim 7, characterized in that: A brush plate (11) is fixedly mounted on the side of the paddle (10) close to the dirt storage bin (5), a filter screen (9) is snap-fittedly mounted on the side of the brush plate (11) close to the water injection pipe (4), and a side surface of one end of the filter screen (9) is in contact with the side surface of the brush plate (11), and a groove is provided on the outer surface of one end of the filter screen (9), and an opening is provided on the side of the filter screen (9) close to the dirt storage bin (5).

9. The easily disassembled oilfield water injection filtering device according to claim 8, characterized in that: A long strip protrusion is fixedly arranged between the blade (10) and the water injection pipe (4) in the outer shell (1), and the long strip protrusion is located between the brush plate (11) and the clamp (8). The long strip protrusion in the outer shell (1) is engaged with the groove of the filter screen (9), and a second sealing gasket (19) is arranged between the filter screen (9) and the water injection pipe (4).

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