Oilfield boosting water injection device

Abstract

The present invention belongs to the field of petroleum engineering technology, and in particular relates to an oilfield booster water injection device, comprising a base, a booster water injector mounted on the base, a bracket connected to the base, a dual-channel filtering mechanism provided on the bracket, and an injection pipe connected to the water outlet of the booster water injector via a plug. The plug is provided to automatically connect the injection pipe to the booster water injector when the booster water injector supplies high-pressure water, and to automatically cut off the connection between the injection pipe and the booster water injector when the booster water injector stops supplying high-pressure water. This prevents the potential risk of water backwashing in the injection pipe when the booster water injector stops supplying high-pressure water, avoids backwashing of high-pressure oil in the oilfield, and significantly improves stability and safety.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum engineering, and in particular relates to an oilfield pressurized water injection device. Background Art

[0002] During the initial primary recovery phase of oil production, the formation's own energy is primarily responsible for pushing oil to the surface. However, as production progresses, formation pressure gradually decreases, leading to a decrease in oil production. In these situations, secondary recovery techniques are often used to replenish formation energy. One common method is boosted water injection, which involves injecting high-pressure water into the oilfield to maintain or increase formation pressure, promoting the flow of oil to production wells and ultimately improving oil recovery efficiency.

[0003] After searching, a Chinese patent with patent publication number CN116816314A is found, which is a skid-mounted booster water injection device for oil field booster water injection, including a booster water injection machine, a water inlet and a water outlet. The top of the booster water injection machine is the water inlet, and the right side of the booster water injection machine is the water outlet. It also includes a filtering mechanism and a cleaning mechanism. The water inlet is provided with a filtering mechanism for filtering impurities in the water and a cleaning mechanism for cleaning the water inlet.

[0004] Although the above patent can perform water injection and pressure boosting in oil fields and filter the water injected into the oil layer, it still has the following defects in actual use:

[0005] 1. Lack of automatic cleaning mechanism for the filter: The current filter design cannot achieve automatic cleaning. If it is not cleaned manually regularly, it may cause the filter element to become clogged, affecting water injection efficiency. In addition, the need for manual cleaning of filtered impurities increases the maintenance workload.

[0006] 2. Lack of backwash protection mechanism: During the process of water injection and pressurization of the oil layer, if there is an irresistible situation such as sudden damage or shutdown of the water injection booster, the high-pressure oil inside the oil field may backwash, that is, the oil will rush back from the water outlet of the booster, resulting in equipment damage and even an increased risk of oil spillage. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an oilfield boosting water injection device with integrated automatic cleaning and backwash protection functions.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an oilfield booster water injection device, comprising a base, a booster water injection machine is installed on the base, a bracket is connected to the base, a dual-channel filtering mechanism is provided on the bracket, the dual-channel filtering mechanism comprises two cylinders connected to the bracket, both cylinders are connected to a filter cartridge with an open top, an electrically controlled connecting pipe is provided on the bracket, the cylinders are connected to the water inlet of the booster water injection machine through the electrically controlled connecting pipe, the electrically controlled connecting pipe is used to control the two cylinders to alternately connect with the water inlet of the booster water injection machine, an injection pipe is connected to the electrically controlled connecting pipe, the electrically controlled connecting pipe is used to control the two filter cartridges to alternately connect with the injection pipe so that the two filter cartridges are used alternately, two lifting mechanisms are provided on the bracket, both lifting mechanisms are provided with electric roller brushes, inlet and outlet holes are opened on the top of the cylinder for electric roller brushes to lift and clean the filter cartridges, the water outlet of the booster water injection machine is connected to the water injection pipe through a plugger, and when the water outlet stops discharging water, the plugger can automatically block the water injection pipe to avoid backwashing.

[0009] Preferably, the electrically controlled communicating device includes a lower shell connected to the lower part of the bracket, the liquid injection pipe is connected to the side wall of the lower shell, a lower rotating block is provided in the lower shell, a horizontal hole connected to the liquid injection pipe is opened on the lower rotating block, an L-shaped hole connected to the horizontal hole is opened on the lower rotating block, a drainage hole is opened on the lower rotating block, two sewage pipes are connected to the bottom of the lower shell, two liquid infusion pipes connected to the two filter cartridges respectively are connected to the top of the lower shell, the upper part of the bracket is connected to the upper shell, the top and bottom of the upper shell are connected to two water pipes, the upper water pipe is connected to the water inlet of the booster water injection machine, and the two lower water pipes are connected to the two cylinders respectively, an upper rotating block is provided in the upper shell, the upper rotating block is provided with a connecting hole connected to the water pipe, and a driving assembly for driving the lower rotating block and the upper rotating block to rotate synchronously is provided on the bracket.

[0010] Preferably, the plugger includes a cylinder connected to the water outlet of the booster water injection machine, a butt joint located at the lower side of the water outlet of the booster water injection machine is connected to the side of the cylinder, the water injection pipe is connected to the liquid outlet end of the butt joint, a circular plate 1 is provided in the cylinder for sliding, a spring 1 is connected between the circular plate 1 and the cylinder, a circular plate 2 is provided in the cylinder for blocking the water outlet of the booster water injection machine, a spring 2 is connected between the circular plate 2 and the circular plate 1, a circular hole is opened at the lower part of the circular plate 2, and the lower part of the circular plate 1 facing the circular plate 2 is connected A conical plugging cylinder is connected for sealing the circular hole and the butt joint tube. A support block is slidably connected to the conical plugging cylinder at circumferential intervals on the side of the conical plugging cylinder away from the circular plate one. A spring three is connected between the support block and the inner wall of the conical plugging cylinder. An electric push rod is installed on the circular plate one. The telescopic rod of the electric push rod is connected to a conical push block located in the conical plugging cylinder. The conical push block is in contact with the support block. A support ring for supporting the support block is connected in the butt joint tube. The support ring is located on the outside of the conical plugging cylinder. A pressure sensor one is installed on the side of the circular plate two facing the circular plate one.

[0011] Preferably, a layered pressure control mechanism is provided at the liquid outlet end of the water injection pipe, and the layered pressure control mechanism includes an extension pipe connected to the liquid outlet end of the water injection pipe, and a detachable mounting shell is embedded and installed on the extension pipe at axial intervals, an injection pipe connected to the interior of the extension pipe is installed in the mounting shell, and the liquid outlet end of the injection pipe extends out of the mounting shell, and an electrically controlled pressure reducing valve is installed on the injection pipe, and a cylinder body is connected to the mounting shell, and one side of the cylinder body is open, and a pressure sensor 2 is installed on the inner wall of the cylinder body, and a piston rod for pressing the pressure sensor 2 is slidingly provided in the cylinder body, and a spring 4 is connected between the piston rod and the cylinder body, and an opening is opened on the mounting shell for liquid to enter and squeeze the piston rod.

[0012] Preferably, the dual-channel filtering mechanism further includes a delivery pipe and a solenoid valve. The two cylinders are connected by a delivery pipe, and the solenoid valve is installed on the delivery pipe.

[0013] Preferably, the driving assembly includes a rotating shaft rotatably connected to the bracket, the two ends of the rotating shaft respectively extend into the lower shell and the upper shell, the two ends of the rotating shaft are respectively connected to the lower rotating block and the upper rotating block, a servo motor is installed on the top of the upper shell, and the output shaft of the servo motor is connected to the upper rotating block.

[0014] Preferably, the electric roller brush includes a brush roller arranged on a lifting mechanism, the bottom of the brush roller is connected to a blocking block for blocking the inlet and outlet holes at the top of the cylinder, and the lifting mechanism is equipped with a drive motor for driving the brush roller to rotate and clean the filter cylinder.

[0015] Preferably, a cover for covering and protecting the electric roller brush is connected to the top of the cylinder.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The electronically controlled connecting device can automatically connect the two cylinders alternately with the water inlet of the booster water injection machine, and can also automatically connect the two filter cartridges alternately with the injection pipe, so that the two filter cartridges can be used alternately, thereby ensuring that the booster water injection machine is continuously and effectively supplied with water, improving the water injection efficiency, and the lifting mechanism can drive the electric roller brush to move into the filter cartridge to automatically clean the filter cartridge, eliminating the need for manual regular cleaning of filtered impurities and reducing maintenance workload.

[0018] 2. Through the setting of the plugging device, the water injection pipe and the booster water injection machine can be automatically connected when the booster water injection machine supplies high-pressure water, and the connection between the water injection pipe and the booster water injection machine can be automatically cut off when the booster water injection machine stops supplying high-pressure water. This can prevent the potential risk caused by water backwash in the water injection pipe when the booster water injection machine stops supplying high-pressure water, avoid the backwash phenomenon of high-pressure oil inside the oil field, and significantly improve stability and safety.

[0019] 3. By cooperating with the piston rod and pressure sensor arranged at intervals on the extension pipe, the water injection pressure in a specific depth area of the oil field can be detected in real time. By arranging the electric pressure reducing valves at intervals on the extension pipe, each electric pressure reducing valve is responsible for adjusting the water injection pressure in a specific depth area of the oil field, thereby ensuring that each oil layer can be injected and pressurized at an appropriate pressure, thereby avoiding the situation where the water injection pressure is too high or too low, and improving the water injection and pressurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the dual-channel filtering mechanism of the present invention.

[0023] Figure 4 This is a cross-sectional view of the dual-channel filtering mechanism of the present invention.

[0024] Figure 5 It is a partial three-dimensional structural diagram of the dual-channel filtering mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the electric roller brush of the present invention.

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the occluder of the present invention Figure 1 .

[0027] Figure 8 This is an exploded view of the occluder of the present invention.

[0028] Figure 9 Schematic diagram of the three-dimensional structure of the occluder of the present invention Figure 2 .

[0029] Figure 10 Schematic diagram of the three-dimensional structure of the occluder of the present invention Figure 3 .

[0030] Figure 11 This is a schematic diagram of the installation of the layered pressure control mechanism of the present invention.

[0031] Figure 12 It is a schematic diagram of the three-dimensional structure of the layered pressure control mechanism of the present invention.

[0032] In the figure: 1-base, 2-boosting water injection machine, 21-water inlet, 22-water outlet, 3-bracket, 41-cylinder, 42-filter cartridge, 43-inlet and outlet holes, 44-injection pipe, 45-lower shell, 46-lower rotating block, 461-transverse hole, 462-L-shaped hole, 463-drain hole, 47-upper shell, 48-upper rotating block, 481-connecting hole, 49-water pipe, 410-liquid pipe, 411-sewage pipe, 412-delivery pipe, 413-solenoid valve, 414-servo motor, 415-rotating shaft, 5-blocking device, 51-cylinder, 52-butt pipe, 53-circular plate 1, 54-spring 1, 55-spring 2, 56-circular plate 2, 561-circular hole, 57-electric push rod, 58-conical plugging cylinder, 59-conical push block, 510-support block, 511-spring 3, 512-support ring, 513-pressure sensor 1, 6-water injection pipe, 71-lifting plate, 72-driving part, 8-electric roller brush, 81-driving motor, 82-brush roller, 83-sealing block, 91-extension pipe, 92-mounting shell, 921-opening, 93-injection pipe, 94-electrically controlled pressure reducing valve, 95-cylinder body, 96-piston rod, 97-spring 4, 98-pressure sensor 2, 10-cover body, 11-opening. DETAILED DESCRIPTION

[0033] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] See also Figures 1-6, an oilfield booster water injection device includes a base 1, a booster water injection machine 2 is installed on the top of the base 1, a bracket 3 is connected to the top of the base 1, the bracket 3 is located at the front side of the booster water injection machine 2, and a dual-channel filtering mechanism is provided on the bracket 3. The dual-channel filtering mechanism includes two left and right cylinders 41 connected to the bracket 3, and the two cylinders 41 are connected to a filter cylinder 42 for filtering impurities. The top of the filter cylinder 42 is an open setting. A delivery pipe 412 is connected between the two cylinders 41, and an electromagnetic valve 413 is installed on the delivery pipe 412. An electrically controlled communicating device is provided on the bracket 3, and the cylinder 41 is connected to the water inlet 21 of the booster water injection machine 2 through the electrically controlled communicating device. The electrically controlled communicating device is used to control the two cylinders 41 to alternately communicate with the water inlet 21 of the booster water injection machine 2. An injection pipe 44 is connected to the electrically controlled communicating device, and the electrically controlled communicating device is used to control the two filter cartridges 42 to alternately communicate with the injection pipe 44 so that the two filter cartridges 42 can be used alternately. The electrically controlled communicating device includes a lower shell 45 connected to the lower part of the bracket 3, and the injection pipe 44 is connected to the front side of the lower shell 45. A lower rotating block 46 is rotatably provided in the lower shell 45. A transverse hole 461 communicating with the injection pipe 44 is opened on the lower rotating block 46, an L-shaped hole 462 communicating with the transverse hole 461 is opened on the lower rotating block 46, and a drainage hole 463 is opened on the lower rotating block 46. The bottom of the lower shell 45 is connected to two left and right sewage pipes 411, and the top of the lower shell 45 is connected to two left and right infusion pipes 410 respectively communicating with the left and right filter cartridges 42. The upper part of the bracket 3 is connected to the upper shell 47. The top and bottom of the upper shell 47 are connected to two water pipes 49 on the left and right. The upper water pipe 49 is connected to the water inlet 21 of the booster water injection machine 2, and the two lower water pipes 49 are connected to the two cylinders 41 respectively. An upper rotating block 48 is rotatably provided in the upper shell 47. A connecting hole 481 communicating with the water pipe 49 is opened at an eccentric position of the upper rotating block 48. A driving assembly for driving the lower rotating block 46 and the upper rotating block 48 to rotate synchronously is provided on the bracket 3. The driving assembly includes a rotating shaft 415 rotatably connected to the bracket 3. The two ends of the rotating shaft 415 are rotatably extended into the lower shell 45 and the upper shell 47 respectively. The two ends of the rotating shaft 415 are connected to the lower rotating block 46 and the upper rotating block 48 respectively. A servo motor 414 is installed on the top of the upper shell 47. The output shaft of the servo motor 414 is connected to the upper rotating block 48. The bracket 3 is provided with two left and right lifting mechanisms. The lifting mechanism includes a lifting plate 71 slidably connected to the front side of the bracket 3. The lifting plate 71 is in a Z-shape. The front side of the bracket 3 is provided with a driving member 72 for driving the lifting plate 71 to move up and down. In a specific implementation, the driving member 72 can be a linear motor, a screw motor, a cylinder, an electric slide rail, etc. An electric roller brush 8 is provided on each of the two lifting plates 71. An inlet and outlet hole 43 for electric roller brush 8 to lift and clean the filter cartridge 42 is opened at the top of the cylinder 41. After the lifting plate 71 moves down, the inlet and outlet hole 43 is blocked to prevent sewage from leaking from the inlet and outlet hole 43 when cleaning the filter cartridge 42. The electric roller brush 8 includes a brush roller 82 rotatably arranged on the lifting plate 71.The bottom of the brush roller 82 is connected to a sealing block 83 for sealing the inlet and outlet holes 43 at the top of the cylinder 41 to prevent water from leaking from the cylinder 41 and the filter cartridge 42 through the inlet and outlet holes 43. A drive motor 81 is mounted on the top of the lifting plate 71. The output shaft of the drive motor 81 is connected to the brush roller 82 to drive the brush roller 82 to rotate and clean the filter cartridge 42. The water outlet 22 of the booster water injector 2 is connected to the water injection pipe 6 through the sealing device 5. When the water outlet 22 stops discharging water, the sealing device 5 can automatically seal the water injection pipe 6 to prevent backwash.

[0035] See also Figure 7-10 The plugger 5 includes a cylinder 51 connected to the water outlet 22 of the booster water injection machine 2, and a butt joint 52 located at the lower side of the water outlet 22 of the booster water injection machine 2 is connected to the right side of the cylinder 51, and the water injection pipe 6 is connected to the liquid outlet end of the butt joint 52. A circular plate 1 53 is slidingly provided in the cylinder 51, and two springs 1 54 are symmetrically connected between the circular plate 1 53 and the cylinder 51. A circular plate 2 56 for blocking the water outlet 22 of the booster water injection machine 2 is slidingly provided in the cylinder 51. The circular plate 2 56 is located on the right side of the circular plate 1 53, and two sliding rods are connected to the left side of the circular plate 2 56 at intervals. The sliding rod slides through the circular plate 1 53 to guide the movement of the circular plate 2 56. A spring 2 55 is sleeved on the two sliding rods, and the two ends of the spring 2 55 are respectively connected to the circular plate 2 56 and the circular plate 1 53. The spring constant (elastic coefficient) of 55 is smaller than the spring constant (elastic coefficient) of spring 1 54, a circular hole 561 is opened at the lower part of circular plate 2 56, and a conical plugging cylinder 58 for blocking the circular hole 561 and the docking tube 52 is connected to the lower right part of circular plate 1 53, and a support block 510 is connected to the right side of the conical plugging cylinder 58 in a circumferentially spaced sliding manner, and a spring 3 511 is connected between the support block 510 and the inner wall of the conical plugging cylinder 58, an electric push rod 57 is embedded in circular plate 1 53, and a conical push block 59 located in the conical plugging cylinder 58 is connected to the telescopic rod of the electric push rod 57, and the conical push block 59 is in contact with the support block 510, and a support ring 512 for supporting the support block 510 is connected to the docking tube 52, and the support ring 512 is located on the outside of the conical plugging cylinder 58, and a pressure sensor 1 513 is installed on the left side of circular plate 2 56.

[0036] First, the injection pipe 44 is connected to an external water source. Water then flows through the injection pipe 44 into the horizontal hole 461 on the lower rotating block 46. The water then flows through the L-shaped hole 462 on the lower rotating block 46 and the liquid delivery pipe 410 into the filter cartridge 42. Impurities in the water are filtered by the filter cartridge 42, preventing impurities in the water from entering the booster water injector 2, thereby preventing impurities from corroding the booster water injector 2. The water filtered by the filter cartridge 42 is sequentially injected into the water inlet 21 of the booster water injector 2 through the lower water delivery pipe 49, the connecting hole 481 on the upper rotating block 48, and the upper water delivery pipe 49. The water flows through the water inlet 21 into the booster water injector 2, and is then pressurized by the booster water injector 2. The pressurized water flows out of the water outlet 22.

[0037] Since there is only one L-shaped hole 462 and one drainage hole 463 on the lower rotating block 46, and only one communication hole 481 on the upper rotating block 48, when the left filter cartridge 42 is connected to the liquid injection pipe 44 and the left cylindrical body 41 is connected to the water inlet 21 of the booster water injector 2 to supply water, the right filter cartridge 42 is disconnected from the liquid injection pipe 44 and the right cylindrical body 41 is disconnected from the water inlet 21 of the booster water injector 2, and water supply is stopped. Controlling the servo motor 414 to drive the upper rotating block 48 to rotate 180 degrees can cause the communication hole 481 to rotate 180 degrees and switch its position, so that the communication hole 481 is alternately connected to the left and right water supply pipes 49, thereby enabling the two cylindrical bodies 41 to alternately connect to the water inlet 21 of the booster water injector 2. The upper rotating block 48 rotates 180 degrees, driving the lower rotating block 46 to rotate 180 degrees via the rotating shaft 415, thereby allowing the L-shaped hole 462 to rotate 180 degrees and switch positions, so that the L-shaped hole 462 alternately connects with the left and right liquid infusion tubes 410, thereby allowing the two filter cartridges 42 to alternately connect with the liquid injection tube 44, thereby allowing the two filter cartridges 42 to be used alternately. The lower rotating block 46 rotates 180 degrees, driving the drain hole 463 to rotate 180 degrees and switch positions, so that the drain hole 463 alternately connects with the left and right liquid infusion tubes 410 and sewage pipes 411. When the drain hole 463 connects with the left liquid infusion tube 410 and sewage pipe 411 to discharge impurities in the left filter cartridge 42, the right liquid infusion tube 410 connects with the L-shaped hole 462 to supply water, and the right sewage pipe 411 is blocked by the lower rotating block 46 and cannot drain water. Similarly, when the drainage hole 463 is connected with the right liquid infusion pipe 410 and the sewage pipe 411 to discharge impurities in the right filter cylinder 42, the left liquid infusion pipe 410 is connected with the L-shaped hole 462 to supply water, and the left sewage pipe 411 is blocked by the lower rotating block 46 and cannot drain water, thereby ensuring that the booster water injection machine 2 is continuously and effectively supplied with water.

[0038] When the left filter cartridge 42 is connected to the liquid injection pipe 44 and the left cylinder 41 is connected to the water inlet 21 of the booster water injector 2 for water supply, the right filter cartridge 42 can be cleaned. The right drive member 72 is controlled to drive the right lifting plate 71, driving the right electric roller brush 8 downward to enter the right filter cartridge 42. The right drive motor 81 is then controlled to drive the right brush roller 82 to rotate, cleaning the right filter cartridge 42. Simultaneously, the solenoid valve 413 is controlled to open, allowing water from the left cylinder 41 to be transferred into the right cylinder 41 through the delivery pipe 412. The brush roller 82 uses the water to clean the filter cartridge 42. The sewage in the right filter cartridge 42 is then discharged through the right liquid delivery pipe 410, the drain hole 463, and the right sewage pipe 411. After the right filter cartridge 42 is cleaned, the solenoid valve 413 is closed, and the right drive member 72 is controlled to drive the right lifting plate 71, driving the right electric roller brush 8 upward to move out of the right filter cartridge 42. Similarly, when the right filter cartridge 42 is connected to the injection pipe 44 and the right cylinder 41 is connected to the water inlet 21 of the booster water injector 2 for water supply, the left filter cartridge 42 can be cleaned. In this way, the device can automatically connect the two cylinders 41 alternately with the water inlet 21 of the booster water injector 2, and can also automatically connect the two filter cartridges 42 alternately with the injection pipe 44, so that the two filter cartridges 42 are used alternately, thereby ensuring that the booster water injector 2 is continuously and effectively supplied with water, improving the water injection efficiency, and the lifting mechanism can drive the electric roller brush 8 to move into the filter cartridge 42 to automatically clean the filter cartridge 42, eliminating the need for manual regular cleaning of filtered impurities, thereby reducing maintenance workload.

[0039] The pressurized water flows through the water outlet 22 and is injected into the cylinder 51. The high-pressure water pushes the circular plate 2 56 to move to the left and compresses the spring 2 55. At this time, the support block 510 is supported by the conical push block 59 and stuck on the right side of the support ring 512. The spring 3 511 is compressed, and the conical plug 58 and the circular plate 1 53 are locked and cannot move to the left. As a result, the circular plate 2 56 drives the pressure sensor 1 513 to move to the left, so that the pressure sensor 1 513 is pressed by the circular plate 1 53. When the pressure sensor 513 detects that the pressure reaches the preset value, the pressure sensor 513 sends a signal to the controller (the controller is not shown in the figure, the controller is existing technology and will not be described here). After receiving the signal, the controller controls the telescopic rod of the electric push rod 57 to extend, so as to push the conical push block 59 to move to the right to release the support block 510. Under the reset action of the spring three 511, the support block 510 can be retracted into the conical plug 58 and disengaged from the support ring 512, thereby releasing the lock on the conical plug 58 and then releasing the lock on the circular plate 53. As high-pressure water continues to flow into cylinder 51, circular plate 2 56 continues to move leftward, thereby pushing circular plate 1 53 leftward and compressing spring 1 54. The leftward movement of circular plate 1 53 drives conical push block 59 leftward and out of docking pipe 52, thereby releasing the blockage of docking pipe 52. This automatically connects injection pipe 6 with booster water injector 2 when high-pressure water is supplied by booster water injector 2. High-pressure water then enters docking pipe 52 and is discharged from injection pipe 6 into the oil field, achieving boosted water injection in the oil field. Conical plug 58 remains inserted in circular hole 561, blocking circular hole 561, thereby preventing high-pressure water from entering between circular plates 1 53 and 2 56, ensuring that the high-pressure water is always on the right side of circular plate 2 56.

[0040] If the water injection booster suddenly breaks down or shuts down, ceasing to inject high-pressure water into cylinder 51, the spring force of spring 2 55 is less than that of spring 1 54. Therefore, circular plate 1 53 immediately drives conical plug 58 rightward into butt joint 52, sealing it. Support block 510 then moves rightward to the right of support ring 512. The rightward movement of circular plate 1 53, through spring 2 55, simultaneously pushes circular plate 2 56 rightward. Subsequently, under the elastic force of spring 2 55, circular plate 2 56 drives pressure sensor 1 513 further rightward, disengaging from circular plate 1 53. When pressure sensor 1 513 detects that the pressure is less than a preset value, pressure sensor 1 513 sends a signal to the controller. After receiving the signal, the controller controls the telescopic rod of electric push rod 57 to retract, pulling conical push block 59 to move leftward. Conical push block 59 moves leftward, pushing support block 510 out of conical plugging tube 58 and contacting the right side of support ring 512, compressing spring 3 511. Thus, by cooperating with conical push block 59, support block 510, and support ring 512, conical plugging tube 58 can be locked and sealed to butt joint 52, automatically cutting off the connection between water injection pipe 6 and booster water injector 2 when booster water injector 2 stops supplying high-pressure water. This prevents the potential risk caused by water backwash in water injection pipe 6 when booster water injector 2 stops supplying high-pressure water, avoids backwash of high-pressure oil in the oil field, and significantly improves stability and safety.

[0041] During the water injection process, due to the heterogeneity of the formation, the water injection pressure may be unevenly distributed, thus affecting the water injection effect. For example, some areas may cause the formation to rupture or be damaged due to excessive pressure; while other areas cannot effectively displace crude oil due to too low pressure, and the expected pressurization effect cannot be achieved. In a preferred embodiment, see Figure 1 、 Figure 11 and Figure 12In order to avoid the situation where the water injection pressure is too high or too low, a layered pressure control mechanism is provided at the liquid outlet end of the water injection pipe 6. The layered pressure control mechanism includes an extension pipe 91 connected to the liquid outlet end of the water injection pipe 6. A detachable mounting shell 92 is embedded and installed on the extension pipe 91 at intervals along its length extension direction. The mounting shell 92 consists of two upper and lower arc-shaped shells, which are connected by bolts. An injection pipe 93 that is connected to the interior of the extension pipe 91 is connected to the lower arc-shaped shell of the mounting shell 92. The liquid outlet end of the injection pipe 93 extends to the mounting shell 92. Outside the upper curved shell of the mounting shell 92, an electrically controlled pressure reducing valve 94 is installed on the injection pipe 93, and a cylinder body 95 is connected to the right inner wall of the lower curved shell of the mounting shell 92. A pressure sensor 2 98 is installed on the right inner wall of the cylinder body 95. The left side of the cylinder body 95 is open, and a piston rod 96 for pressing the pressure sensor 2 98 is slidably connected in the cylinder body 95. A spring 4 97 is connected between the piston rod 96 and the cylinder body 95. An opening 921 is opened on the upper curved shell of the mounting shell 92 for liquid to enter and squeeze the piston rod 96.

[0042] Extension tube 91 is inserted into the oilfield. Water is injected into extension tube 91 through injection pipe 6. The water in extension tube 91 then enters injection pipe 93 and is ultimately discharged from injection pipe 93 into the oilfield, achieving pressurized water injection into the oilfield. Liquid enters cylinder 95 through opening 921, squeezing piston rod 96, causing it to move rightward, pressing pressure sensor 2 98 and compressing spring 4 97. When pressure sensor 2 98 detects a pressure greater than a preset value, it sends a signal to the controller. Upon receiving the signal, the controller activates electronically controlled pressure reducing valve 94 to reduce pressure (electronically controlled pressure reducing valve 94 is conventional technology and will not be described further here). This prevents excessive injection pressure from causing formation fractures or damage. In this way, by cooperating with the piston rod 96 and the pressure sensor 98 arranged at intervals on the extension tube 91, the water injection pressure in a specific depth area of the oil field can be detected in real time. By arranging the electrically controlled pressure reducing valves 94 at intervals on the extension tube 91, each electrically controlled pressure reducing valve 94 is responsible for adjusting the water injection pressure in a specific depth area of the oil field, thereby ensuring that each oil layer can perform water injection and pressurization operations at an appropriate pressure, thereby avoiding the situation where the water injection pressure is too high or too low, and improving the water injection and pressurization effect.

[0043] See also Figure 1 A cover body 10 is connected to the top of the cylinder 41, and the cover body 10 covers the electric roller brush 8. A through hole 11 is opened on the front side of the cover body 10 for the lifting and lowering of the lifting plate 71. By covering the electric roller brush 8 with the cover body 10, the electric roller brush 8 can be covered and protected to prevent foreign objects from hitting the electric roller brush 8 and causing damage to it.

[0044] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An oilfield booster water injection device, comprising a base (1), a booster water injection machine (2) mounted on the base (1), and a bracket (3) connected to the base (1), characterized in that: The bracket (3) is provided with a dual-channel filtering mechanism, which includes two cylinders (41) connected to the bracket (3), and the two cylinders (41) are both connected to a filter cylinder (42) with an open top. The bracket (3) is provided with an electric control connector, and the cylinders (41) are connected to the water inlet (21) of the booster water injection machine (2) through the electric control connector. The electric control connector is used to control the two cylinders (41) to alternately connect with the water inlet (21) of the booster water injection machine (2). The electric control connector is connected to a liquid injection pipe (44), and the electric control connector is used to control The two filter cartridges (42) are alternately connected to the injection pipe (44) so that the two filter cartridges (42) can be used alternately. Two lifting mechanisms are provided on the bracket (3). Both lifting mechanisms are provided with electric roller brushes (8). The top of the cylinder (41) is provided with an inlet and outlet hole (43) for the electric roller brush (8) to lift and clean the filter cartridge (42). The water outlet (22) of the booster water injection machine (2) is connected to the water injection pipe (6) through a plugging device (5). When the water outlet (22) stops discharging water, the plugging device (5) can automatically block the water injection pipe (6) to avoid backwashing. The plug (5) includes a cylinder (51) connected to the water outlet (22) of the booster water injection machine (2), a butt joint (52) located at the lower side of the water outlet (22) of the booster water injection machine (2) is connected to the side of the cylinder (51), and a water injection pipe (6) is connected to the liquid outlet end of the butt joint (52). A circular plate (53) is provided in a sliding manner in the cylinder (51), and a spring (54) is connected between the circular plate (53) and the cylinder (51). A circular plate (56) for plugging the water outlet (22) of the booster water injection machine (2) is provided in a sliding manner in the cylinder (51), and a spring (55) is connected between the circular plate (56) and the circular plate (53). A circular hole (561) is opened at the lower part of the circular plate (56), and a spring (561) is connected at the lower part of the side of the circular plate (53) facing the circular plate (56) for plugging the water outlet (22) of the booster water injection machine (2). A conical plugging cylinder (58) for sealing the circular hole (561) and the butt joint tube (52) is provided. A support block (510) is slidably connected to the conical plugging cylinder (58) at intervals along the circumferential direction on the side of the conical plugging cylinder (58) away from the circular plate (53). A spring (511) is connected between the support block (510) and the inner wall of the conical plugging cylinder (58). An electric push rod (57) is installed on the circular plate (53). A conical push block (59) located in the conical plugging cylinder (58) is connected to the telescopic rod of the electric push rod (57). The conical push block (59) is in contact with the support block (510). A support ring (512) for supporting the support block (510) is connected to the butt joint tube (52). The support ring (512) is located on the outside of the conical plugging cylinder (58). A pressure sensor (513) is installed on the side of the circular plate (56) facing the circular plate (53).

2. The oilfield boosting water injection device according to claim 1, characterized in that: The electrically controlled communicating device comprises a lower shell (45) connected to the lower part of the bracket (3), a liquid injection pipe (44) connected to the side wall of the lower shell (45), a lower rotating block (46) provided in the lower shell (45), a transverse hole (461) communicating with the liquid injection pipe (44) provided on the lower rotating block (46), an L-shaped hole (462) communicating with the transverse hole (461) provided on the lower rotating block (46), a drainage hole (463) provided on the lower rotating block (46), two sewage pipes (411) connected to the bottom of the lower shell (45), and a drain hole (463) connected to the two filter cartridges (42) respectively on the top of the lower shell (45). The upper portion of the bracket (3) is connected to an upper shell (47), and the top and bottom of the upper shell (47) are connected to two water pipes (49), the upper water pipe (49) is connected to the water inlet (21) of the booster water injection machine (2), and the two lower water pipes (49) are respectively connected to the two cylinders (41), an upper rotating block (48) is provided in the upper shell (47), and a communicating hole (481) communicating with the water pipe (49) is opened on the upper rotating block (48), and a driving assembly for driving the lower rotating block (46) and the upper rotating block (48) to rotate synchronously is provided on the bracket (3).

3. The oilfield boosting water injection device according to claim 2, characterized in that: The liquid outlet end of the water injection pipe (6) is provided with a layered pressure control mechanism, which includes an extension pipe (91) connected to the liquid outlet end of the water injection pipe (6), a detachable mounting shell (92) is embedded and installed on the extension pipe (91) at intervals along the axial direction, an injection pipe (93) connected to the interior of the extension pipe (91) is installed in the mounting shell (92), the liquid outlet end of the injection pipe (93) extends out of the mounting shell (92), and an electric control pressure reducing valve (91) is installed on the injection pipe (93). 4) A cylinder (95) is connected to the mounting housing (92), one side of the cylinder (95) is open, a second pressure sensor (98) is mounted on the inner wall of the cylinder (95), a piston rod (96) for pressing the second pressure sensor (98) is slidably provided in the cylinder (95), a fourth spring (97) is connected between the piston rod (96) and the cylinder (95), and an opening (921) is provided on the mounting housing (92) for allowing liquid to enter therein and squeeze the piston rod (96).

4. The oilfield boosting water injection device according to claim 3, characterized in that: The dual-channel filtering mechanism further comprises a delivery pipe (412) and a solenoid valve (413). The two cylinders (41) are connected by the delivery pipe (412), and the solenoid valve (413) is installed on the delivery pipe (412).

5. The oilfield boosting water injection device according to claim 4, characterized in that: The driving assembly includes a rotating shaft (415) rotatably connected to the bracket (3), with two ends of the rotating shaft (415) respectively extending into the lower housing (45) and the upper housing (47), and the two ends of the rotating shaft (415) are respectively connected to the lower rotating block (46) and the upper rotating block (48), and a servo motor (414) is installed on the top of the upper housing (47), and the output shaft of the servo motor (414) is connected to the upper rotating block (48).

6. The oilfield boosting water injection device according to claim 5, characterized in that: The electric roller brush (8) comprises a brush roller (82) arranged on a lifting mechanism, a blocking block (83) for blocking the inlet and outlet holes (43) at the top of the cylinder (41) is connected to the bottom of the brush roller (82), and a driving motor (81) for driving the brush roller (82) to rotate and clean the filter cylinder (42) is installed on the lifting mechanism.

7. The oilfield boosting water injection device according to claim 6, characterized in that: A cover (10) for covering and protecting the electric roller brush (8) is connected to the top of the cylinder (41).

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