Anti-backflow oil extraction water injection equipment

Abstract

The utility model discloses anti-backflow oil extraction water injection equipment which comprises a connecting pipe, the lower end of the connecting pipe is connected with an oil well, a blowout prevention device is arranged between the oil well and the connecting pipe, and the end, away from the ground, of the connecting pipe is connected with one end of a service valve. And supporting pieces are installed on the outer surfaces of the two sides of the service valve in a penetrating mode, an assembly shell is arranged at the end, away from the connecting pipe, of the service valve, and a pressure sensor is arranged in the assembly shell. According to the anti-backflow oil extraction water injection equipment, when water returns to an oil well, the water flows back to the interior of the assembly shell through the connecting pipe, at the moment, the backflow protection net can filter the backflow well water to block impurities in the water, meanwhile, the backflow water pressure can push back the plugging cover, the side surface of the plugging cover is attached to the assembly shell through the rocker arm, and therefore the plugging cover is prevented from being blocked. The problem that the valve cannot be closed due to the fact that impurities block the sealing cover assembly shell is prevented, and meanwhile water flow is prevented from continuously flowing back.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production, in particular to a backflow-proof oil production water injection device. Background Art

[0002] With the development and application of science and technology, various tools used by people have been developed. Oil has become an indispensable source of power for many devices. Oil is a natural resource, which is mainly stored underground. It is a non-renewable resource that cannot be synthesized artificially. In the process of oil extraction, water injection devices are needed to inject water into the oil field to avoid the formation of underground cavities and ground collapse after the oil is extracted. At the same time, water is injected into the oil field to keep the oil field under pressure, which is convenient for subsequent extraction.

[0003] The existing patent document with the technical publication number CN217354338U provides a water injection device for oil mining with adjustable water injection pressure, including a support plate, a gearbox, a water tank and a water injection pipe; the gearbox and the water tank are respectively arranged on the left and right sides above the support plate, and a water injection pipe for injecting water is arranged at the lower right corner of the water tank, a two-way screw rod, a bearing is connected between the gearbox and the water tank, and the outer side of the two-way screw rod is threadedly connected with a push plate slidably engaged in the water tank, a filter plate is arranged above the inside of the water tank, and a baffle for blocking water is arranged inside the water tank, and a magnetic plate for blocking water is slidably engaged in the inside of the baffle;

[0004] With respect to the above-mentioned related technology, the inventors have found that the technology has at least the following problems: the water injection device in the above-mentioned patent document cannot prevent the water injected into the oil well from flowing back. Utility Model Content

[0005] The utility model aims to provide a backflow-proof petroleum production water injection equipment to solve the problem of water backflow in the oil well after water injection proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-backflow oil production and water injection equipment, comprising a connecting pipe, the lower end of which is connected to an oil well, and an anti-blowout device is arranged between the oil well and the connecting pipe, the end of the connecting pipe away from the ground is connected to one end of a maintenance valve, and supports are installed through the outer surfaces of both sides of the maintenance valve, the end of the maintenance valve away from the connecting pipe is provided with a component housing, and a pressure sensor is arranged inside the component housing, and an anti-backflow structure is arranged inside the component housing, which prevents water injected into the oil well from flowing back into the connecting pipe and the component housing to cause blockage.

[0007] Preferably, the anti-backflow structure includes: a rocker arm, which is rotatably mounted on one end of the component housing away from the inspection valve, and a sealing cover is fixedly mounted on one end of the rocker arm, and the outer surface of the sealing cover is in contact with the inner surface of the component housing, an inspection port is opened in the component housing at the upper end of the sealing cover, and the inspection port of the component housing is closed by an end cover, and a backflow protection net is fixedly mounted inside the component housing.

[0008] By adopting the above technical solution, the blocking cover will be pushed open after the water flows through, so that the blocking cover drives the rocker arm to rotate and open to allow the water to flow through. When the oil well flows back, the backflow protection net will filter the backflow water to prevent the debris in the oil well from rushing out and jamming the blocking cover, causing the blocking cover to be unable to close. The impact and pressure of the backflow water and the weight of the blocking cover will cause the blocking cover to automatically close and prevent the blocking cover from continuing to flow back.

[0009] Preferably, an automatic cleaning structure is provided inside the component housing, and the backflow protection net is cleaned by the automatic cleaning structure.

[0010] By adopting the above technical solution, the backflow protection net can be cleaned to prevent the backflow protection net from being blocked and causing the water injection flow rate to decrease.

[0011] Preferably, the automatic cleaning structure includes: fan blades, which are rotatably installed inside the component housing, and the component housing and the fan blades are concentrically designed, and a brush head is fixedly installed on the end of the fan blade away from the rocker arm, and the brush head is concentrically designed with the fan blades, and the outer surface of one end of the brush head is in contact with the outer surface of the backflow protection net.

[0012] By adopting the above technical solution, the fan blades can be driven to rotate by the water flow during water injection, and the rotation of the fan blades can drive the brush head to clean the backflow protection net.

[0013] Preferably, a rotary pipe is provided on the side of the component housing close to the ground, and one end of the rotary pipe is opened at one end of the component housing close to the inspection valve, and one end of the rotary pipe is opened at one end of the component housing close to the sealing cover, an electromagnetic valve is opened and installed on the outer surface of the rotary pipe, and a filter is clamped and installed between the electromagnetic valve and the rotary pipe, a conical valve plug is slidably installed on one end of the rotary pipe close to the sealing cover, and a spring is provided between the conical valve plug and the component housing.

[0014] By adopting the above technical solution, when the water in the oil well flows back, the sealing cover will be closed, and the water will flow back into the component housing through the rotary pipe and the conical valve plug opened by the filter screen. At the same time, when the pressure sensor detects that the pressure exceeds the set value, the electromagnetic valve will drain the water to the outside and discharge the dirt brought by the backflow.

[0015] Preferably, an adjustable pressure water injection structure is provided at one end of the component housing away from the inspection valve, and the water flow rate inside the water injection device is adjusted by the adjustable pressure water injection structure.

[0016] By adopting the above technical solution, the flow rate of injected water can be adjusted.

[0017] Preferably, the adjustable pressure water injection structure includes: a pump body shell, the pump body shell is fixedly installed at one end of the component shell, and a water inlet is opened on the outer surface of the pump body shell, and a one-way valve is arranged at one end of the water inlet, a one-way valve is arranged between the pipeline connecting the pump body shell and the component shell, and a piston head is arranged inside the pump body shell, and the piston head and the pump body shell are concentrically designed, the pump body shell and the piston head are connected by sliding friction, and one end of the piston head passes through the outer surface of the pump body shell, a cylinder is fixedly installed on one side of the pump body shell, and the output end of the cylinder is connected to one end of the piston head, and an adjusting screw is threadedly installed on one end of the pump body shell close to the cylinder.

[0018] By adopting the above technical solution, the one-way valve is used to prevent the water from pushing the piston head open and entering the water source during backflow, and water can also be injected into the well with greater pressure.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the anti-backflow petroleum production water injection equipment:

[0020] 1. When the oil well returns water, the water will flow back to the inside of the component housing through the connecting pipe. At this time, the backflow protection net will filter the returned well water to block the impurities in the water. At the same time, the backflow water pressure will push the plugging cover back, and the side surface of the plugging cover will fit with the component housing through the rocker arm to prevent impurities from clogging between the plugging cover and the component housing, causing the valve to be unable to close, and preventing the water from continuing to flow back;

[0021] 2. When water is injected into the component housing through the water inlet, the water pressure generated by the water flow will push the blocking cover open. At the same time, the water flow passing through the component housing will push the fan blades to rotate. The thrust of the water flow will cause the brush head to rotate together, so that the brush head can clean the backflow protection net, so that the backflow protection net is always kept clean to avoid affecting the flow of water passing through during water injection;

[0022] 3. When the water in the oil well flows back, the water will enter the component housing, and after being filtered through the filter screen through the rotary pipe, the cone valve plug spring is compressed back into the component housing. At this time, the pressure in the component housing increases. When the pressure exceeds the set value of the pressure sensor, the electromagnetic valve will open to discharge the return water, discharge impurities and other objects, and reduce the pressure in the component housing, so that the pressure returns to the specified value;

[0023] 4. When the cylinder contracts, the piston head will be pulled outward, so that water is sucked into the pump shell through the water inlet. When the cylinder is compressed, the piston head will be pushed out. At the same time, due to the one-way passability of the one-way valve, when the piston head contracts, the liquid in the component shell will not be sucked out. When the piston head is pushed out, water will be injected into the component shell. Through the use of the one-way valve and the piston head, water with higher pressure can be injected into the oil well;

[0024] 5. When the pressure of the injected water needs to be adjusted in a small range, it is only necessary to adjust the adjusting screw on one side of the pump body shell. When the adjusting screw is screwed outward, the cylinder will leave a larger activity space for the piston head and inject a large amount of water. When the adjusting screw is screwed inward, the activity space of the piston head will be reduced to inject a smaller amount of water. The amount of injected water can be adjusted to ensure the pressure in the oil well. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0027] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0028] Figure 4 For this utility model Figure 2 Schematic diagram of the cross-section structure at point B;

[0029] Figure 5 This is a schematic diagram of the top view of the connection between the pump body and the cylinder of the utility model;

[0030] Figure 6 It is a schematic diagram of the side sectional structure of the component housing and the backflow protection net of the utility model.

[0031] In the figure: 1. connecting pipe; 2. inspection valve; 3. support; 4. component housing; 5. rocker arm; 6. blocking cover; 7. backflow protection net; 8. fan blade; 9. brush head; 10. rotary pipe; 11. filter screen; 12. solenoid valve; 13. conical valve plug; 14. spring; 15. one-way valve; 16. pump body; 17. piston head; 18. adjusting screw; 19. cylinder; 20. water inlet; 21. pressure sensor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-6 The utility model provides a technical solution: a backflow-proof petroleum production water injection equipment.

[0034] Example 1

[0035] The present embodiment discloses: a connecting pipe 1, the lower end of the connecting pipe 1 is connected to an oil well, and a blowout prevention device is arranged between the oil well and the connecting pipe 1, the end of the connecting pipe 1 away from the ground is connected to one end of a check valve 2, and the outer surfaces of both sides of the check valve 2 are penetrated and installed with support members 3, the end of the check valve 2 away from the connecting pipe 1 is provided with a component housing 4, and a pressure sensor 21 is arranged inside the component housing 4, and an anti-backflow structure is arranged inside the component housing 4, and the anti-backflow structure prevents water injected into the oil well from flowing back into the connecting pipe 1 and the component housing 4 to cause blockage, and the anti-backflow structure includes: a rocker arm 5, the rocker arm 5 is rotatably installed at the end of the component housing 4 away from the check valve 2, and a sealing cover 6 is fixedly installed at one end of the rocker arm 5, and the outer surface of the sealing cover 6 is in contact with the inner surface of the component housing 4, an inspection port is opened at the component housing 4 at the upper end of the sealing cover 6, and the inspection port of the component housing 4 is closed by an end cover, and a backflow protection net 7 is fixedly installed inside the component housing 4.

[0036] When using the device, connect the connecting pipe 1 to the anti-blowout device, then install the inspection valve 2 and support the management through the support member 3. When water is injected into the interior of the component housing 4, the water flow will flush the sealing cover 6 to drive the rocker arm 5 to rotate, allowing the water flow to enter the component housing 4 and be injected into the oil well through the connecting pipe 1. When the pressure in the oil well is abnormal and backflow occurs, the water flow will impact the sealing cover 6 after being filtered by the backflow protection net 7, so that the sealing cover 6 is closed. At the same time, the backflow protection net 7 will ensure that there are no impurities between the sealing cover 6 and the component housing 4, which may cause poor sealing and backflow into the water supply pipeline.

[0037] Example 2

[0038] This embodiment is based on the embodiment 1 and discloses: an automatic cleaning structure is provided inside the component housing 4, and the backflow protection net 7 is cleaned by the automatic cleaning structure, and the automatic cleaning structure includes: a fan blade 8, the fan blade 8 is rotatably installed inside the component housing 4, and the component housing 4 and the fan blade 8 are concentrically designed, and a brush head 9 is fixedly installed at one end of the fan blade 8 away from the rocker arm 5, the brush head 9 and the fan blade 8 are concentrically designed, and the outer surface of one end of the brush head 9 is in contact with the outer surface of the backflow protection net 7.

[0039] By adding the above structure, when water is continuously injected into the interior of the component housing 4 from the water inlet 20, the passing water flow will generate thrust on the fan blades 8, driving the fan blades 8 to rotate, causing the brush head 9 to rotate together, cleaning the backflow protection net 7, and preventing the backflow protection net 7 from being blocked and causing a reduction in the water flow rate.

[0040] Example 3

[0041] This embodiment is disclosed on the basis of Embodiment 1 and Embodiment 2: a rotary pipe 10 is provided on the side of the component housing 4 close to the ground, and one end of the rotary pipe 10 is opened at the end of the component housing 4 close to the inspection valve 2, and one end of the rotary pipe 10 is opened at the end of the component housing 4 close to the blocking cover 6, an electromagnetic valve 12 is opened and installed on the outer surface of the rotary pipe 10, and a filter screen 11 is clamped and installed between the electromagnetic valve 12 and the rotary pipe 10, a conical valve plug 13 is slidably installed on the end of the rotary pipe 10 close to the blocking cover 6, and a spring 14 is provided between the conical valve plug 13 and the component housing 4.

[0042] By adding the above structure, when water flows back from the oil well, it will pass through the return pipe 10 and be filtered by the filter screen 11, pushing the conical valve plug 13 to deform the spring 14, so that the water flow entering the side of the component housing 4 is guaranteed to be clean. When the pressure sensor 21 detects that the pressure in the component housing 4 reaches the set value, the electromagnetic valve 12 will open to release the pressure and remove the dirt on the filter screen 11, so that the pressure in the oil well is maintained within the specified range.

[0043] Example 4

[0044] This embodiment is disclosed on the basis of embodiment 1: an adjustable pressure water injection structure is provided at one end of the component housing 4 away from the inspection valve 2, and the water flow rate inside the water injection device is adjusted by the adjustable pressure water injection structure. The adjustable pressure water injection structure includes: a pump body shell 16, the pump body shell 16 is fixedly installed at one end of the component housing 4, and a water inlet 20 is opened on the outer surface of the pump body shell 16, and a one-way valve 15 is provided at one end of the water inlet 20, a one-way valve 15 is provided between the pipeline connecting the pump body shell 16 and the component housing 4, and a piston head 17 is provided inside the pump body shell 16, and the piston head 17 and the pump body shell 16 are concentrically designed, the pump body shell 16 and the piston head 17 are connected by sliding friction, and one end of the piston head 17 passes through the outer surface of the pump body shell 16, a cylinder 19 is fixedly installed on one side of the pump body shell 16, and the output end of the cylinder 19 is connected to one end of the piston head 17, and an adjusting screw 18 is threadedly installed at one end of the pump body shell 16 close to the cylinder 19.

[0045] By adding the above structure, the piston head 17 can be driven to slide by the contraction of the cylinder 19 to suck water from the water inlet 20, and the one-way valve 15 can be used to prevent the water in the oil well from being sucked into the pump body shell 16. The piston head 17 can be pushed out by the push of the cylinder 19 to inject the water in the pump body shell 16 into the oil well. When the pressure in the oil well needs to be guaranteed within a certain range, the amount of water injected needs to be adjusted. The movable range of the piston head 17 can be expanded by screwing the adjusting screw 18 out of the pump body shell 16 for a distance, so that the pump body shell 16 can absorb more water. The movable range of the piston head 17 can be reduced by screwing the adjusting screw 18 into the pump body shell 16, so that the pump body shell 16 can absorb a small amount of water. The amount of water injected can be adjusted by adjusting the adjusting screw 18.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-backflow oil production and water injection equipment, comprising a connecting pipe (1), the lower end of the connecting pipe (1) is connected to an oil well, and an anti-blowout device is arranged between the oil well and the connecting pipe (1), the end of the connecting pipe (1) away from the ground is connected to one end of a check valve (2), and the outer surfaces of both sides of the check valve (2) are penetrated and installed with support members (3), the end of the check valve (2) away from the connecting pipe (1) is provided with a component housing (4), and a pressure sensor (21) is arranged inside the component housing (4), characterized in that: The component housing (4) is provided with an anti-backflow structure inside, and the anti-backflow structure prevents water injected into the oil well from flowing back into the connecting pipe (1) and the component housing (4) to cause blockage.

2. The anti-backflow petroleum production water injection equipment according to claim 1, characterized in that: The backflow prevention structure comprises: a rocker arm (5), the rocker arm (5) being rotatably mounted on one end of the component housing (4) away from the inspection valve (2), and a blocking cover (6) being fixedly mounted on one end of the rocker arm (5), and the outer surface of the blocking cover (6) being in contact with the inner surface of the component housing (4), an inspection opening being provided in the component housing (4) at the upper end of the blocking cover (6), and the inspection opening of the component housing (4) being closed by an end cover, and a backflow protection net (7) being fixedly mounted inside the component housing (4).

3. The anti-backflow petroleum production water injection equipment according to claim 1, characterized in that: An automatic cleaning structure is provided inside the component housing (4), and the backflow protection net (7) is cleaned by the automatic cleaning structure.

4. The anti-backflow petroleum production water injection equipment according to claim 3, characterized in that: The automatic cleaning structure comprises: a fan blade (8), the fan blade (8) being rotatably mounted inside a component housing (4), the component housing (4) and the fan blade (8) being concentrically designed, and a brush head (9) being fixedly mounted on one end of the fan blade (8) away from the rocker arm (5), the brush head (9) being concentrically designed with the fan blade (8), and the outer surface of one end of the brush head (9) being in contact with the outer surface of the backflow protection net (7).

5. The anti-backflow petroleum production water injection equipment according to claim 1, characterized in that: A rotary pipe (10) is provided on the side of the component housing (4) close to the ground, and one end of the rotary pipe (10) is opened at one end of the component housing (4) close to the inspection valve (2), and one end of the rotary pipe (10) is opened at one end of the component housing (4) close to the blocking cover (6). An electromagnetic valve (12) is opened and installed on the outer surface of the rotary pipe (10), and a filter screen (11) is installed and engaged between the electromagnetic valve (12) and the rotary pipe (10). A conical valve plug (13) is slidably installed at one end of the rotary pipe (10) close to the blocking cover (6), and a spring (14) is provided between the conical valve plug (13) and the component housing (4).

6. The anti-backflow petroleum production water injection equipment according to claim 1, characterized in that: An adjustable pressure water injection structure is provided at one end of the component housing (4) away from the inspection valve (2), and the water flow rate inside the water injection device is adjusted by the adjustable pressure water injection structure.

7. The anti-backflow petroleum production water injection equipment according to claim 6, characterized in that: The adjustable pressure water injection structure comprises: a pump shell (16), the pump shell (16) being fixedly mounted on one end of the component shell (4), and the outer surface of the pump shell (16) being provided with a water inlet (20), and one end of the water inlet (20) being provided with a one-way valve (15), a one-way valve (15) being provided between the pipeline connecting the pump shell (16) and the component shell (4), and a piston head (17) being provided inside the pump shell (16), and the piston head (17) and the pump shell (16) being of concentric design, the pump shell (16) and the piston head (17) being in sliding friction connection, and one end of the piston head (17) penetrating the outer surface of the pump shell (16), a cylinder (19) being fixedly mounted on one side of the pump shell (16), and the output end of the cylinder (19) being connected to one end of the piston head (17), and an adjusting screw (18) being threadedly mounted on one end of the pump shell (16) close to the cylinder (19).

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