A new type of oil production water injection metering device

Abstract

The utility model relates to oil extraction water injection device technical field especially relates to a novel oil extraction water injection metering device, including water injection pipe, still including the detection pipe who links in the water injection pipe top, the detection pipe top is linked with the detection box, the both sides of detection box are all linked with the conveying pipe, the other end of conveying pipe is linked with the filter mechanism, the filter mechanism includes the protection filter who links in the other end of conveying pipe, the filter box who links with the other end of protection filter, the filter assembly of setting in the filter box inside and with the other side filter box link's water inlet pipe, the filter box inside is provided with backflushing mechanism, the utility model sets up the filter mechanism who is in parallel, and in it integration is driven by the cleaning assembly of water wheel and by the backflushing component of pipeline assembly energy supply, has realized the collaborative movement of filtration and cleaning, effectively solved the low water injection efficiency problem of traditional device because of shutdown cleaning.

Description

Technical Field

[0001] This utility model relates to the technical field of oil production water injection devices, and in particular to a novel oil production water injection metering device. Background Technology

[0002] Water injection metering devices are key equipment in oilfield development. Their core function is to accurately measure and monitor the pressure of water injected into the oil layer, thereby achieving precise replenishment of formation energy and optimization of displacement efficiency. This is an important guarantee for ensuring stable oilfield production and improving ultimate recovery rate.

[0003] In existing technologies, water sources typically contain various impurities such as oil, suspended particles, and microorganisms. If these impurities directly enter the metering device, they can easily clog the precision water pressure and flow rate sensors or wear down the regulating valves, leading to inaccurate metering and equipment damage. Therefore, installing a pre-filtration system before the metering device has become a common practice.

[0004] While some filtration devices exist in the existing technology, when the filter screens in these devices become clogged due to the interception of impurities, it leads to increased water resistance, decreased water injection pressure, and reduced flow rate. At this point, water injection operations must be suspended, and the filter screens must be disassembled, cleaned, or replaced. This process is not only cumbersome and costly to maintain, but more importantly, it causes an interruption in water injection operations, which seriously affects oil production efficiency and the continuity of oilfield production. Although some equipment is equipped with backflushing functions, the water injection process also needs to be stopped during backflushing, making it impossible to achieve truly continuous operation.

[0005] Therefore, for the existing oilfield water injection metering devices with filtration functions, there is a problem that water injection operations must be suspended to disassemble, clean, or replace the filter screen. A new type of oilfield water injection metering device can be designed that can backflushed or replace the filter screen without interrupting water injection. Utility Model Content

[0006] To overcome the problem that existing oilfield water injection metering devices with filtration functions require suspending water injection operations to disassemble, clean, or replace the filter screen.

[0007] The technical solution of this utility model is as follows: a novel oilfield water injection metering device, comprising a water injection pipe, and a detection pipe connected to the top of the water injection pipe. A detection box is connected to the top of the detection pipe, and conveying pipes are connected to both sides of the detection box. A filtration mechanism is connected to the other end of the conveying pipe. The filtration mechanism includes a protective filter connected to the other end of the conveying pipe, a filter box connected to the other end of the protective filter, a filter assembly disposed inside the filter box, and a water inlet pipe connected to the other side of the filter box. A backwashing mechanism is disposed inside the filter box. The backwashing mechanism includes a cleaning assembly disposed inside the filter box, a backflushing assembly disposed inside the filter box, and a pipeline assembly connected to the conveying pipe.

[0008] Preferably, during normal water injection, water enters from the inlet pipe of one of the filter mechanisms, flows through the filter screen in the filter box, and the water flow drives the water wheel of the cleaning component to rotate, thereby driving the cleaning plate to rotate continuously, scraping off the impurities attached to the water inlet side of the filter screen, playing a preliminary self-cleaning role. The filtered clean water enters the detection box and detection pipe through the delivery pipe, and the water pressure and flow rate are monitored in real time by the water pressure sensor and the flow rate sensor. Finally, it is injected into the oil layer through the water injection pipe. When the flow rate sensor detects that the water flow rate is lower than the preset threshold, indicating that the currently used filter screen is seriously blocked, the system automatically switches the water source to another set of backup filter mechanisms to maintain continuous water injection. Subsequently, the automatic control valve changes its switch state, so that the water flow that originally entered the blocked filter mechanism is guided to the backwash component through the connecting pipe and the diversion pipe of the pipeline assembly. High-pressure water is sprayed out from the backwash nozzle, impacting the filter screen in reverse. At the same time, the automatic control valve on the slag discharge pipe opens to discharge the flushed impurities from the system, thereby completing the online cleaning without interrupting the water injection operation.

[0009] Preferably, the filter assembly includes a fixing plate fixedly connected to both sides inside the filter box, and a filter screen fixedly connected to the inside of the fixing plate by bolts.

[0010] Preferably, the cleaning assembly includes a support plate fixedly connected inside the filter box, a waterwheel movably connected inside the support plate via a bearing, and a cleaning plate fixedly connected to one side of the waterwheel.

[0011] Preferably, the backwash assembly includes a mounting plate disposed inside the filter box, a backwash plate fixedly connected to one side of the mounting plate, and a backwash nozzle communicating with one side of the backwash plate.

[0012] Preferably, the bottom of the filter box is connected to a slag discharge pipe, which is Y-shaped, and the conveying pipe, slag discharge pipe, water inlet pipe and the surface of the pipeline assembly are all connected to self-control valves.

[0013] Preferably, the piping assembly includes a connecting pipe connected to the bottom of the inlet pipe and a branch pipe connected to the other end of the connecting pipe.

[0014] Preferably, a water pressure sensor is connected to the front side of the detection tube, and a flow rate sensor is installed inside the detection box.

[0015] The beneficial effects of this utility model are as follows: By setting up a parallel filtration mechanism and integrating a cleaning component driven by a water turbine and a backwash component powered by a pipeline assembly, the coordinated movement of filtration and cleaning is achieved. During normal water injection, the water flow drives the cleaning plate to continuously scrape the filter screen, delaying clogging. When the flow rate sensor detects a decrease in flow, the external system can automatically switch to the backup filtration unit to continue water supply, while guiding the water flow in reverse to flush the clogged filter screen and quickly discharge the sludge through the slag discharge pipe. This continuous movement process allows the filter screen cleaning operation to be carried out without interrupting the water injection operation, effectively solving the problem of low water injection efficiency caused by shutdown cleaning in traditional equipment, and effectively improving the continuity and automation level of oilfield production. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of Embodiment 1 of a novel oil production water injection metering device of this utility model; Figure 2 The diagram shown is a schematic representation of the composition of the filter assembly and the cleaning assembly in a novel oil production and water injection metering device according to this utility model. Figure 3 The diagram shows the position of the backflushing component in the filter box in a novel oil production water injection metering device according to this utility model. Figure 4 The diagram shown is a schematic representation of the composition and structure of the filtration mechanism in a novel oilfield water injection metering device according to this utility model. Figure 5 The diagram shown is a schematic representation of the backflushing component in a novel oil production water injection metering device according to this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Water injection pipe; 2. Detection pipe; 3. Detection box; 4. Delivery pipe; 5. Filtration mechanism; 51. Protective filter; 52. Filter box; 53. Filter assembly; 531. Fixing plate; 532. Filter screen; 54. Water inlet pipe; 6. Backwashing mechanism; 61. Cleaning assembly; 611. Support plate; 612. Hydraulic wheel; 613. Cleaning plate; 62. Backwash assembly; 621. Mounting plate; 622. Backwash plate; 623. Backwash nozzle; 63. Piping assembly; 631. Connecting pipe; 632. Diverter pipe; 7. Slag discharge pipe; 8. Automatic control valve; 9. Water pressure sensor; 10. Flow rate sensor. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1 Please see Figure 1 and Figure 4 This utility model provides an embodiment: a novel oilfield water injection metering device, including a water injection pipe 1, and a detection pipe 2 connected to the top of the water injection pipe 1. The top of the detection pipe 2 is connected to a detection box 3. Both sides of the detection box 3 are connected to conveying pipes 4. The other end of the conveying pipe 4 is connected to a filter mechanism 5. The filter mechanism 5 includes a protective filter 51 connected to the other end of the conveying pipe 4, a filter box 52 connected to the other end of the protective filter 51, a filter assembly 53 disposed inside the filter box 52, and a water inlet pipe 54 connected to the other side of the filter box 52. There are two filter mechanisms 5 and two water inlet pipes 54. The filter assembly 53 includes a fixing plate 531 fixedly connected to both sides inside the filter box 52, and a filter screen 532 fixedly connected to the fixing plate 531 by bolts. The filter screens 532 are disposed in pairs inside the filter box 52.

[0020] During operation, the filter mechanism 5 performs online and continuous filtration of the injected water, preventing suspended particles, oil stains, and other impurities in the water from entering the subsequent detection box 3 and water injection pipe 1, thereby protecting the precision water pressure sensor 9 and flow rate sensor 10, ensuring measurement accuracy and system reliability. The injected water flows into the filter box 52 from the water inlet pipe 54 and passes through multiple sets of filter screens 532. During this process, impurities are trapped on the water inlet side of the filter screen 532. At the same time, the force of the water flow will drive the water wheel 612 of the cleaning component 61 to rotate. The water wheel 612 drives the cleaning plate 613 connected to it to continuously scrape the surface of the filter screen 532, thereby initially removing the impurities attached to the screen and slowing down the clogging speed of the filter screen.

[0021] Example 2 Please see Figure 2 , 3 and Figure 5The difference from Embodiment 1 is that a backwashing mechanism 6 is provided inside the filter box 52. The backwashing mechanism 6 includes a cleaning assembly 61 and a backwashing assembly 62 disposed inside the filter box 52, and a pipeline assembly 63 connected to the conveying pipe 4. The cleaning assembly 61 includes a support plate 611 fixedly connected inside the filter box 52, a water wheel 612 movably connected inside the support plate 611 via a bearing, and a cleaning plate 613 fixedly connected to one side of the water wheel 612. The cleaning plate 613 contacts the surface of the filter screen 532. The backwashing assembly 62 includes a cleaning assembly 613 disposed inside the filter box 52. The internal mounting plate 621 is fixedly connected to the fixing plate 531 by bolts. A backwash plate 622 is fixedly connected to one side of the mounting plate 621, and a backwash nozzle 623 is connected to one side of the backwash plate 622. The backwash assembly 62 is located on the side of the filter screen 532 away from the cleaning assembly 61. The pipeline assembly 63 includes a connecting pipe 631 connected to the bottom of the water inlet pipe 54. The connecting pipe 631 is arranged in a cross shape, and a diversion pipe 632 connected to the other end of the connecting pipe 631. The diversion pipe 632 is connected to the backwash plate 622. The self-control valve 8 is connected to the surface of the diversion pipe 632 in the pipeline assembly 63.

[0022] The function of the backwashing mechanism 6 is to automatically and efficiently clean the clogged filter screen 532 online without interrupting the overall water injection operation, so as to restore its filtration capacity and solve the pain point of traditional filter screens requiring shutdown for disassembly and cleaning. When the flow rate sensor 10 detects that the water flow rate is too low, the control system will issue a command. First, the automatic control valve 8 group will act to switch the main water inlet to another set of standby filter mechanisms 5 to ensure continuous water supply. Then, the automatic control valve 8 on the pipeline assembly 63 of the clogged filter mechanism 5 will open, allowing some high-pressure water to enter the backwash assembly 62 through the connecting pipe 631 and the diversion pipe 632, and be sprayed out at high speed from the backwash nozzle 623. This reverse water flow powerfully impacts the filter screen 532, washing away the trapped impurities from the screen surface. At the same time, the valve on the slag discharge pipe 7 will open, and the flushed dirt will be discharged from the system with the water flow, completing one automatic backwashing cycle.

[0023] Example 3 Please see Figure 1 and Figure 4 The difference from Embodiment 1 is that the bottom of the filter box 52 is connected to the slag discharge pipe 7, which is Y-shaped. The conveying pipe 4, the slag discharge pipe 7, the water inlet pipe 54 and the surface of the pipeline assembly 63 are all connected to the self-control valve 8. The front side of the detection pipe 2 is connected to the water pressure sensor 9, and the flow rate sensor 10 is installed inside the detection box 3.

[0024] The slag discharge pipe 7 discharges the impurities backwashed from the filter screen 532. The automatic control valve 8 adjusts the water flow direction by opening and closing. The water pressure sensor 9 detects the water pressure entering the water injection pipe 1 after filtration. The flow rate sensor 10 detects the flow rate of the water entering the detection pipe 2 after filtration. If the flow rate is lower than the preset threshold, the filter mechanism 5 is switched to backwash the previous filter mechanism 5.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A novel oilfield water injection metering device, comprising a water injection pipe (1), characterized in that: It also includes a detection pipe (2) connected to the top of the water injection pipe (1), a detection box (3) connected to the top of the detection pipe (2), and delivery pipes (4) connected to both sides of the detection box (3); The other end of the conveying pipe (4) is connected to a filter mechanism (5). The filter mechanism (5) includes a protective filter (51) connected to the other end of the conveying pipe (4), a filter box (52) connected to the other end of the protective filter (51), a filter assembly (53) disposed inside the filter box (52), and an inlet pipe (54) connected to the other side of the filter box (52). The filter box (52) is provided with a backwashing mechanism (6). The backwashing mechanism (6) includes a cleaning component (61) provided inside the filter box (52), a backwashing component (62) provided inside the filter box (52), and a pipeline component (63) connected to the delivery pipe (4).

2. The novel oilfield water injection metering device according to claim 1, characterized in that: The filter assembly (53) includes a fixing plate (531) fixedly connected to both sides inside the filter box (52), and a filter screen (532) fixedly connected to the inside of the fixing plate (531) by bolts.

3. The novel oilfield water injection metering device according to claim 1, characterized in that: The cleaning assembly (61) includes a support plate (611) fixedly connected inside the filter box (52), a water wheel (612) movably connected inside the support plate (611) via a bearing, and a cleaning plate (613) fixedly connected to one side of the water wheel (612).

4. A novel oilfield water injection metering device according to claim 3, characterized in that: The backwash assembly (62) includes a mounting plate (621) disposed inside the filter box (52), a backwash plate (622) fixedly connected to one side of the mounting plate (621), and a backwash nozzle (623) connected to one side of the backwash plate (622).

5. A novel oilfield water injection metering device according to claim 1, characterized in that: The bottom of the filter box (52) is connected to a slag discharge pipe (7), which is Y-shaped. The conveying pipe (4), the slag discharge pipe (7), the water inlet pipe (54), and the surface of the pipeline assembly (63) are all connected to self-control valves (8).

6. A novel oilfield water injection metering device according to claim 1, characterized in that: The piping assembly (63) includes a connecting pipe (631) connected to the bottom of the inlet pipe (54) and a branch pipe (632) connected to the other end of the connecting pipe (631).

7. A novel oilfield water injection metering device according to claim 1, characterized in that: A water pressure sensor (9) is connected to the front of the detection tube (2), and a flow rate sensor (10) is installed inside the detection box (3).

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