Pressurizing water injection device for oil field

Abstract

The invention belongs to the technical field of petroleum engineering, and particularly relates to an oil field pressurizing water injection device which comprises a base, a pressurizing water injection machine is installed on the base, a support is connected to the base, a double-channel filtering mechanism is arranged on the support, and a water injection pipe is connected to the water outlet portion of the pressurizing water injection machine through a plugging device. Through the arrangement of the plugging device, the water injection pipe and the pressurizing water injection machine can be automatically communicated when the pressurizing water injection machine supplies high-pressure water, and communication between the water injection pipe and the pressurizing water injection machine can be automatically cut off when the pressurizing water injection machine stops supplying the high-pressure water, so that the phenomenon that the water injection pipe cannot be communicated with the pressurizing water injection machine when the pressurizing water injection machine stops supplying the high-pressure water can be prevented; potential risks caused by backflushing of water in the water injection pipe are avoided, the backflushing phenomenon of high-pressure oil in an oil field is avoided, and stability and safety are remarkably improved.

Description

Technical Field

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

[0002] In the initial stage of oil production, the energy of the formation itself is mainly used to push the oil to the surface. However, as the production progresses, the formation pressure gradually decreases, resulting in a decrease in oil production. At this time, secondary oil recovery technology is usually needed to replenish the formation energy. One of the commonly used methods is pressure-boosting water injection, which injects high-pressure water into the oil field to maintain or increase the formation pressure, promote the flow of oil to the production well, and ultimately improve the recovery efficiency of oil.

[0003] After searching, a Chinese patent with patent publication number CN116816314A 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: 1. Lack of automatic cleaning mechanism for the filter mechanism: The current design of the filter mechanism cannot achieve automatic cleaning. If it is not cleaned manually regularly, it may cause the filter element to be blocked, affecting the water injection efficiency. In addition, since the impurities filtered out need to be cleaned manually regularly, the maintenance workload is increased.

[0005] 2. Lack of recoil protection mechanism: During the process of water injection and pressurization of the oil layer, if there is force majeure such as sudden damage or shutdown of the water injection booster, the high-pressure oil inside the oil field may recoil, 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

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an oil field boosting water injection device with integrated automatic cleaning and recoil protection functions.

[0007] 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 arranged on the bracket, the dual-channel filtering mechanism comprises two cylinders connected to the bracket, both cylinders are connected with filter cartridges with open tops, an electrically controlled connecting device is arranged on the bracket, the cylinders are connected with the water inlet of the booster water injection machine through the electrically controlled connecting device, the electrically controlled connecting device is used to control the two cylinders to be alternately connected with the water inlet of the booster water injection machine, an injection pipe is connected to the electrically controlled connecting device, the electrically controlled connecting device is used to control the two filter cartridges to be alternately connected with the injection pipe so that the two filter cartridges are used alternately, two lifting mechanisms are arranged on the bracket, both lifting mechanisms are provided with electric roller brushes, inlet and outlet holes for electric roller brushes to lift and clean the filter cartridges are opened on the top of the cylinder, the water outlet of the booster water injection machine is connected with the water injection pipe through a plugging device, when the water outlet stops discharging water, the plugging device can automatically block the water injection pipe to avoid backwashing.

[0008] Preferably, the electrically controlled communicating device comprises a lower shell body connected to the lower part of the bracket, the injection pipe is connected to the side wall of the lower shell body, a lower rotating block is arranged in the lower shell body, a transverse hole connected to the injection pipe is opened on the lower rotating block, an L-shaped hole connected to the transverse 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 body, two liquid infusion pipes connected to the two filter cylinders respectively are connected to the top of the lower shell body, an upper shell body is connected to the upper part of the bracket, two water pipes are connected to the top and bottom of the upper shell body, 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 arranged in the upper shell body, a connecting hole connected to the water pipe is opened on the upper rotating block, and a driving assembly for driving the lower rotating block and the upper rotating block to rotate synchronously is provided on the bracket.

[0009] Preferably, the plugging device comprises a cylinder connected to the water outlet of the booster water injection machine, a butt pipe 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 pipe, a circular plate 1 is slidably provided in the cylinder, a spring 1 is connected between the circular plate 1 and the cylinder, a circular plate 2 is slidably provided in the cylinder for plugging 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 a lower part of the side of the circular plate 1 facing the circular plate 2 is connected A conical plugging cylinder is connected to seal the circular hole and the butt tube. A support block is slidably connected to the conical plugging cylinder at a circumferential interval 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 contacts the support block. A support ring for supporting the support block is connected in the butt tube, and 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.

[0010] 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 tube connected to the liquid outlet end of the water injection pipe, and a detachable mounting shell is embedded and installed on the extension tube at axial intervals, an injection tube connected to the inside of the extension tube is installed in the mounting shell, and the liquid outlet end of the injection tube 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 slidably 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 therein to squeeze the piston rod.

[0011] Preferably, the dual-channel filtering mechanism further comprises 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.

[0012] 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.

[0013] Preferably, the electric roller brush comprises a brush roller arranged on a lifting mechanism, a sealing block for sealing the inlet and outlet holes at the top of the cylinder body is connected to the bottom of the brush roller, and a driving motor for driving the brush roller to rotate and clean the filter cylinder is installed on the lifting mechanism.

[0014] Preferably, a cover body for covering and protecting the electric roller brush is connected to the top of the cylinder body.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The electric-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, without the need for manual regular cleaning of filtered impurities, reducing the maintenance workload.

[0016] 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. In this way, the potential risk caused by water backwash in the water injection pipe when the booster water injection machine stops supplying high-pressure water can be prevented, the backwash phenomenon of high-pressure oil inside the oil field is avoided, and the stability and safety are significantly improved.

[0017] 3. By cooperating with the piston rod and the 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 with water at an appropriate pressure, thereby avoiding the situation where the water injection pressure is too high or too low, and improving the water injection pressure boosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the dual-channel filtering mechanism of the present invention.

[0021] Figure 4 This is a cross-sectional view of the dual-channel filtering mechanism of the present invention.

[0022] Figure 5 It is a partial three-dimensional structural schematic diagram of the dual-channel filtering mechanism of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the electric roller brush of the present invention.

[0024] Figure 7 The three-dimensional structure of the occluder of the present invention is shown in FIG. Figure 1 .

[0025] Figure 8 This is an exploded view of the occluder of the present invention.

[0026] Fig. 9 The three-dimensional structure of the occluder of the present invention is shown in FIG. Figure 2 .

[0027] Fig.10 The three-dimensional structure of the occluder of the present invention is shown in FIG. Figure 3 .

[0028] Fig.11 It is a schematic diagram of the installation of the layered pressure control mechanism of the present invention.

[0029] Fig.12 It is a three-dimensional structural schematic diagram of the layered pressure control mechanism of the present invention.

[0030] In the figure: 1-base, 2-boosting water injection machine, 21-water inlet, 22-water outlet, 3-bracket, 41-cylinder, 42-filter cylinder, 43-inlet and outlet holes, 44-liquid 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-drain pipe, 412-delivery pipe, 413-solenoid valve, 414-servo motor, 415-rotating shaft, 5-blocker, 51-cylinder, 52-butt pipe, 53-circular plate 1, 54-spring One, 55-spring two, 56-circular plate two, 561-circular hole, 57-electric push rod, 58-conical plugging cylinder, 59-conical push block, 510-support block, 511-spring three, 512-support ring, 513-pressure sensor one, 6-water injection pipe, 71-lifting plate, 72-driving part, 8-electric roller brush, 81-driving motor, 82-brush roller, 83-blocking block, 91-extension pipe, 92-installation shell, 921-opening, 93-injection pipe, 94-electrically controlled pressure reducing valve, 95-cylinder body, 96-piston rod, 97-spring four, 98-pressure sensor two, 10-cover body, 11-through port. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here 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. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] See also Figure 1-Figure 6A booster water injection device for oil fields comprises 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, a dual-channel filtering mechanism is arranged on the bracket 3, the dual-channel filtering mechanism comprises two left and right cylinders 41 connected to the bracket 3, both cylinders 41 are connected with filter cylinders 42 for filtering impurities, the top of the filter cylinder 42 is open, a delivery pipe 412 is connected between the two cylinders 41, a solenoid valve 413 is installed on the delivery pipe 412, an electrically controlled connecting device is arranged on the bracket 3, the cylinder 41 is connected to the water inlet 21 of the booster water injection machine 2 through the electrically controlled connecting device, and the electrically controlled connecting device is used to control the two cylinders 41 to alternately connect 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, the injection pipe 44 is connected to the front side of the lower shell 45, and a lower rotating block 46 is rotatably provided in the lower shell 45. The lower rotating block 46 is provided with a transverse hole 461 communicating with the injection pipe 44, the lower rotating block 46 is provided with an L-shaped hole 462 communicating with the transverse hole 461, and the lower rotating block 46 is provided with a drainage hole 463. The bottom of the lower shell 45 is connected to left and right sewage pipes 411, and the top of the lower shell 45 is connected to 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 left and right 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, and an upper rotating block 48 is rotatably provided in the upper shell 47, and a connecting hole 481 connected to the water pipe 49 is opened at an eccentric position of the upper rotating block 48, and a driving component for driving the lower rotating block 46 and the upper rotating block 48 to rotate synchronously is provided on the bracket 3, and the driving component includes a rotating shaft 415 rotatably connected to the bracket 3, and the two ends of the rotating shaft 415 are respectively rotatably extended into the lower shell 45 and the upper shell 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 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 rise and fall. 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 both lifting plates 71. An inlet and outlet hole 43 for lifting and cleaning the filter cartridge 42 is provided 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 with a blocking block 83 for blocking the inlet and outlet holes 43 at the top of the cylinder 41 to prevent the water in the cylinder 41 and the filter cylinder 42 from leaking from the inlet and outlet holes 43. The top of the lifting plate 71 is equipped with a driving motor 81, and the output shaft of the driving motor 81 is connected to the brush roller 82 to drive the brush roller 82 to rotate and clean the filter cylinder 42. The water outlet 22 of the booster water injection machine 2 is connected to the water injection pipe 6 through the plug 5. When the water outlet 22 stops discharging water, the plug 5 can automatically block the water injection pipe 6 to avoid the occurrence of backwash.

[0033] See also Figure 7-Figure 10 The plugging device 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 right side surface 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 53 is slidably provided in the cylinder 51, and two springs 54 are symmetrically connected between the circular plate 53 and the cylinder 51. A circular plate 2 56 for plugging the water outlet 22 of the booster water injection machine 2 is slidably 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 slidably penetrates the circular plate 1 53 to guide the movement of the circular plate 2 56. Springs 2 55 are 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 springs 2 The stiffness coefficient (elastic coefficient) of 55 is smaller than the stiffness coefficient (elastic coefficient) of spring one 54, a circular hole 561 is opened at the lower part of the circular plate two 56, a conical plugging cylinder 58 for blocking the circular hole 561 and the butt joint pipe 52 is connected to the lower right part of the circular plate one 53, a support block 510 is slidably connected to the right side of the conical plugging cylinder 58 at intervals along the circumferential direction, a spring three 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 the circular plate one 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 pipe 52, and the support ring 512 is located on the outside of the conical plugging cylinder 58, and a pressure sensor one 513 is installed on the left side of the circular plate two 56.

[0034] First, the injection pipe 44 is connected to an external water source, and the water then enters the horizontal hole 461 on the lower rotating block 46 through the injection pipe 44, and then the water enters the filter cartridge 42 through the L-shaped hole 462 and the liquid delivery pipe 410 on the lower rotating block 46 in turn, and the impurities in the water are filtered by the filter cartridge 42 to prevent the impurities in the water flow from entering the booster water injection machine 2, thereby preventing the impurities from corroding the booster water injection machine 2. The water filtered by the filter cartridge 42 is sequentially injected into the water inlet 21 of the booster water injection machine 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, and the water flows into the booster water injection machine 2 through the water inlet 21, and then the water flow is pressurized by the booster water injection machine 2, and the pressurized water flows out from the water outlet 22.

[0035] Since there is only one L-shaped hole 462 and one drainage hole 463 on the lower rotating block 46, and only one connecting hole 481 on the upper rotating block 48, when the left filter cartridge 42 is connected to the injection pipe 44 and the left cylinder body 41 is connected to the water inlet 21 of the booster water injector 2 to supply water, the right filter cartridge 42 is not connected to the injection pipe 44 and the right cylinder body 41 is not connected to the water inlet 21 of the booster water injector 2 to stop supplying water. The servo motor 414 is controlled to drive the upper rotating block 48 to rotate 180 degrees, so that the connecting hole 481 can rotate 180 degrees to switch positions, so that the connecting hole 481 is alternately connected to the water pipes 49 on the left and right sides, so that the two cylinder bodies 41 can be alternately connected to the water inlet 21 of the booster water injector 2. The upper rotating block 48 rotates 180 degrees to drive the lower rotating block 46 to rotate 180 degrees through the rotating shaft 415, so that the L-shaped hole 462 can rotate 180 degrees to switch positions, so that the L-shaped hole 462 is alternately connected with the infusion pipes 410 on the left and right sides, so that the two filter cartridges 42 can be alternately connected with the injection pipe 44, and then the two filter cartridges 42 can be used alternately, and the lower rotating block 46 rotates 180 degrees to drive the drainage hole 463 to rotate 180 degrees to switch positions, so that the drainage hole 463 is alternately connected with the infusion pipes 410 and the sewage pipe 411 on the left and right sides. When the drainage hole 463 is connected with the left infusion pipe 410 and the sewage pipe 411 to discharge impurities in the left filter cartridge 42, the right infusion pipe 410 is connected with the L-shaped hole 462 for water supply, 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.

[0036] When the left filter cartridge 42 is connected to the 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, and the right driving member 72 is controlled to drive the right lifting plate 71 to drive the right electric roller brush 8 to move down into the right filter cartridge 42, and then the right driving motor 81 is controlled to drive the right brush roller 82 to rotate to clean the right filter cartridge 42. At the same time, the electromagnetic valve 413 is controlled to open, and the water in the left cylinder 41 is input into the right cylinder 41 through the delivery pipe 412. The brush roller 82 can clean the filter cartridge 42 with the help of water, and the sewage in the right filter cartridge 42 is discharged through the right liquid delivery pipe 410, the drainage hole 463 and the right sewage pipe 411 in turn. After the right filter cartridge 42 is cleaned, the electromagnetic valve 413 is closed, and the right driving member 72 is controlled to drive the right lifting plate 71 to drive the right electric roller brush 8 to move upward from 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 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 driving the electric roller brush 8 to move into the filter cartridge 42 through the lifting mechanism to automatically clean the filter cartridge 42, without the need for manual regular cleaning of filtered impurities, thereby reducing the maintenance workload.

[0037] 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 plugging cylinder 58 and the circular plate 1 53 are locked and cannot move to the left. Therefore, 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 prior art 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 resetting action of the spring three 511, the support block 510 can be retracted into the conical plugging tube 58 and disengaged from the support ring 512, thereby releasing the lock on the conical plugging tube 58, and then releasing the lock on the circular plate 53. As high-pressure water continues to be injected into the cylinder 51, the second circular plate 56 continues to move to the left, thereby pushing the first circular plate 53 to move to the left to compress the spring 1 54. The leftward movement of the first circular plate 53 drives the conical push block 59 to move to the left from the butt joint pipe 52 to release the blockage of the butt joint pipe 52, so as to automatically connect the injection pipe 6 with the booster water injection machine 2 when the booster water injection machine 2 supplies high-pressure water. The high-pressure water then enters the butt joint pipe 52 and is discharged from the injection pipe 6 to be injected into the oil field, so as to realize the booster water injection of the oil field. The conical plugging cylinder 58 is always inserted in the circular hole 561 to block the circular hole 561, so as to prevent the high-pressure water from entering between the first circular plate 53 and the second circular plate 56, and ensure that the high-pressure water is always on the right side of the second circular plate 56.

[0038] When the water injection booster suddenly breaks down or stops suddenly, and stops injecting high-pressure water into the cylinder 51, because the stiffness coefficient (elasticity coefficient) of the second spring 55 is smaller than that of the first spring 54, the circular plate 1 53 immediately drives the conical plug 58 to the right and inserts it into the butt joint 52 under the elastic force of the first spring 54, and the butt joint 52 is blocked, and the support block 510 moves rightward to the right side of the support ring 512. The circular plate 1 53 moves rightward through the second spring 55, and then the second spring 55 pushes the second circular plate 56 to move rightward synchronously, and then the second circular plate 56 drives the pressure sensor 1 513 to continue to move rightward and separate from the first circular plate 53 under the elastic force of the second spring 55. When the pressure sensor 1 513 detects that the pressure is less than the preset value, the pressure sensor 1 513 sends a signal to the controller. After receiving the signal, the controller controls the telescopic rod of the electric push rod 57 to retract, so as to pull the conical push block 59 to move to the left. The conical push block 59 moves to the left to push the support block 510 to extend from the conical plugging tube 58 and contact the right side of the support ring 512, thereby compressing the spring 3 511. Therefore, by cooperating with the conical push block 59, the support block 510 and the support ring 512, the conical plugging tube 58 can be locked and blocked to block the butt pipe 52, so that when the booster water injection machine 2 stops supplying high-pressure water, the connection between the water injection pipe 6 and the booster water injection machine 2 is automatically cut off, thereby preventing the potential risk caused by the water backwash in the water injection pipe 6 when the booster water injection machine 2 stops supplying high-pressure water, avoiding the backwash phenomenon of the high-pressure oil inside the oil field, and significantly improving the stability and safety.

[0039] 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 , Fig.11 and Fig.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, and the layered pressure control mechanism includes an extension pipe 91 connected to the liquid outlet end of the water injection pipe 6, and a detachable installation shell 92 is embedded and installed on the extension pipe 91 at intervals along its length extension direction. The installation shell 92 consists of two upper and lower arc shells, and the upper and lower arc shells are connected by bolts. An injection pipe 93 connected to the interior of the extension pipe 91 is connected to the lower arc shell of the installation shell 92, and the liquid outlet end of the injection pipe 93 extends to the installation shell 92. An electrically controlled pressure reducing valve 94 is installed on the injection pipe 93 outside the upper arc shell of the mounting shell 92, and a cylinder body 95 is connected to the right inner wall of the lower arc shell of the mounting shell 92. A pressure sensor 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 98 is slidably connected in the cylinder body 95. A spring 97 is connected between the piston rod 96 and the cylinder body 95. An opening 921 is opened on the upper arc shell of the mounting shell 92 for liquid to enter and squeeze the piston rod 96.

[0040] The extension pipe 91 is inserted into the oil field, and water is injected into the extension pipe 91 through the water injection pipe 6. The water in the extension pipe 91 then enters the injection pipe 93, and is finally discharged from the injection pipe 93 and injected into the oil field, thereby realizing pressurized water injection into the oil field. The liquid enters the cylinder body 95 through the opening 921 to squeeze the piston rod 96, so that the piston rod 96 moves to the right and presses the pressure sensor 2 98, and the spring 4 97 is compressed accordingly. When the pressure sensor 2 98 detects that the pressure is greater than the preset value, the pressure sensor 2 98 sends a signal to the controller. After receiving the signal, the controller controls the electric control pressure reducing valve 94 to work and reduce the pressure (the electric control pressure reducing valve 94 is a prior art and will not be described in detail here) to avoid excessive water injection pressure causing formation rupture 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.

[0041] 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. The electric roller brush 8 is covered by the cover body 10, so that 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.

[0042] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope 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), a bracket (3) connected to the base (1), characterized in that: A dual-channel filtering mechanism is provided on the bracket (3), the dual-channel filtering mechanism comprising two cylinders (41) connected to the bracket (3), the two cylinders (41) being connected to a filtering cylinder (42) with an open top, an electrically controlled connecting piece is provided on the bracket (3), the cylinders (41) are connected to a water inlet (21) of the booster water injection machine (2) via the electrically controlled connecting piece, the electrically controlled connecting piece is used to control the two cylinders (41) to alternately connect to the water inlet (21) of the booster water injection machine (2), the electrically controlled connecting piece is connected to a liquid injection pipe (44), the electrically controlled connecting piece 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. The bracket (3) is provided with two lifting mechanisms, and both lifting mechanisms are provided with electric roller brushes (8). The top of the cylinder body (41) is provided with an inlet and outlet hole (43) for driving 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) via 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 a backwash phenomenon. The plugging device (5) comprises a cylinder (51) connected to the water outlet (22) of the booster water injection machine (2); a butt joint pipe (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); a water injection pipe (6) is connected to the liquid outlet end of the butt joint pipe (52); a circular plate (53) is slidably provided in the cylinder (51); 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 slidably provided in the cylinder (51); 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 (56) 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 one (53). A spring three (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 one (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 one (513) is installed on the side of the circular plate two (56) facing the circular plate one (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) is arranged in the lower shell (45); a transverse hole (461) communicating with the liquid injection pipe (44) is formed on the lower rotating block (46); an L-shaped hole (462) communicating with the transverse hole (461) is formed on the lower rotating block (46); a drainage hole (463) is formed on the lower rotating block (46); two drainage pipes (411) are connected to the bottom of the lower shell (45); and two drainage pipes (411) are connected to the top of the lower shell (45) respectively communicating with the two filter cartridges (42). The upper part 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 injector (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 connecting hole (481) connected to the water pipe (49) is formed on the upper rotating block (48), and a driving component 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 pressurized water injection device according to claim 2, characterized in that: A layered pressure control mechanism is provided at the liquid outlet end of the water injection pipe (6), the layered pressure control mechanism comprising an extension pipe (91) connected to the liquid outlet end of the water injection pipe (6), a detachable mounting shell (92) being embedded and installed at intervals along the axial direction on the extension pipe (91), an injection pipe (93) communicating with the interior of the extension pipe (91) being installed in the installation shell (92), the liquid outlet end of the injection pipe (93) extending out of the installation shell (92), an electric control pressure reducing valve (91) being installed on the injection pipe (93) 4), a cylinder body (95) is connected to the mounting housing (92), one side of the cylinder body (95) is open, a second pressure sensor (98) is mounted on the inner wall of the cylinder body (95), a piston rod (96) for pressing the second pressure sensor (98) is slidably disposed in the cylinder body (95), a fourth spring (97) is connected between the piston rod (96) and the cylinder body (95), and an opening (921) is provided on the mounting housing (92) for allowing liquid to enter therein to press the piston rod (96).

4. The oilfield pressurized 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 pressurized water injection device according to claim 4, characterized in that: The driving assembly comprises a rotating shaft (415) rotatably connected to the bracket (3), the two ends of the rotating shaft (415) respectively extending into the lower housing (45) and the upper housing (47), the two ends of the rotating shaft (415) respectively connected to the lower rotating block (46) and the upper rotating block (48), a servo motor (414) is mounted 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 an inlet and outlet hole (43) at the top of a 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 pressurized water injection device according to claim 6, characterized in that: A cover body (10) for covering and protecting the electric roller brush (8) is connected to the top of the cylinder body (41).

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