Automatic cleaning device for offshore oilfield delivery pump filter screen

Abstract

The utility model relates to an automatic cleaning device for an offshore oilfield delivery pump filter screen, which comprises a water control device, a buoyancy lift device, a barrel and a filter screen to be cleaned, and the water control device comprises a water source, a water control regulating valve, an inlet quick-opening ball valve, a water supply pipe, a spray head, a hydraulic control switch, a water outlet speed regulating valve, an outlet quick-opening ball valve, a drainage pipe and the like. The device is mainly used for providing a filter screen cleaning water source and controlling the cleaning speed and time. The floating device comprises an oil stain basin, a floating box, a floating sleeve and the like, and is mainly used for dragging the filter screen to be washed to move up and down; the cylinder body comprises a fixed rod, a rolling bearing, an overflow pipe, a water baffle and other parts, and is mainly used for storing cleaning water and realizing self-cleaning of the filter screen; the filter screen to be washed is a filth blockage filter screen used by the delivery pump, and is re-installed for use after being washed. The automatic cleaning device for the offshore oilfield delivery pump filter screen has the remarkable effects that various types of delivery pump filter screens of an offshore oilfield can be automatically cleaned, the cleaning time efficiency and the cleaning environment are remarkably improved, and the automatic cleaning device has good application prospect and reference value.

Description

Technical Field

[0001] This utility model relates to the field of marine oil and gas extraction technology, specifically to an automatic cleaning device for the filter screen of an offshore oilfield transfer pump. Background Technology

[0002] In the scientific development of my country's offshore oil and gas fields, offshore oil and gas processing platforms undertake complex key tasks such as oil-gas-water separation, crude oil transportation, and water injection and reinjection. Currently, my country's offshore platform process systems are equipped with various types of pumps for media transportation. The filter screen, as a core component ensuring stable pump operation, requires regular, high-frequency maintenance and cleaning to address the risk of blockage by particulate impurities, sludge, and polymers in the media. However, under current technological conditions, the following key problems have been exposed: 1. Operation and maintenance efficiency bottleneck: With the continuous increase in offshore oil and gas production and the trend of streamlining platform personnel, the workload of filter screen cleaning has increased exponentially. Traditional manual flushing methods are time-consuming per operation and require two people to complete, making it difficult to meet the regular cleaning frequency requirements of pump equipment. This leads to delays in cleaning operations, gradual filter screen blockage, and unplanned pump shutdowns. 2. Operational Safety Defects: Traditional filter cleaning methods typically employ manual cleaning devices. Due to the lack of a sealed protective structure, sludge and oil on the filter screen splashes everywhere during on-site operation. Furthermore, the high-temperature, high-pressure backfill water used for rinsing the filter screen generates a large amount of oily water mist within the cleaning area, which may contain toxic and harmful gases, directly impacting the physical and mental health of workers. 3. Lack of Automation: Traditional open-type filter screen rinsing methods pollute the working environment, causing personal injury, and are time-consuming, resulting in delayed cleaning. They are also extremely inconvenient to operate and have been gradually abandoned. In response, various offshore platforms have continuously optimized and upgraded their filter screen rinsing devices, but the level of automation remains low and still cannot adapt to the diverse media characteristics of offshore platforms, contradicting the current development concept of moving from manual operation to automated and intelligent operation.

[0003] The aforementioned technical challenges have severely hampered the continuity and stability of offshore oil and gas production. Taking a processing platform at a Bohai Sea offshore oilfield in my country as an example, this platform has over a hundred pumps of various types used for media transport. With the increase in oil and gas processing volume and the reduction in cleaning and maintenance personnel, the workload for cleaning pump filters on-site has increased dramatically. This has led to frequent pump shutdowns due to the inability to clean filters in a timely manner, resulting in significant production losses. Against this backdrop, there is an urgent need to develop an automated filter cleaning device capable of adaptive cleaning, a fully enclosed operation mode, and high-efficiency decontamination characteristics, fundamentally breaking through the constraints of existing technologies. Utility Model Content

[0004] The purpose of this invention is to provide an automatic cleaning device for the filter screen of offshore oilfield transfer pumps, in order to solve the problems mentioned in the background art, such as long cleaning time, low safety of the cleaning operation environment, and inconvenient operation of the current transfer pump filter screen.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic cleaning device for filter screens of offshore oilfield transfer pumps, comprising a water control device, a flotation device, a cylinder, and filter screens to be cleaned. The water control device is fixed on both sides of the cylinder, and a hydraulic control switch is installed on the cylinder to control the water control regulating valve and the outlet speed regulating valve to achieve the switching action and supply cleaning water to the filter screen. The flotation device is installed inside the cylinder and sits on a fixed rod to maintain concentricity and float up and down. The cylinder is used to support the water control device, the flotation device, and the filter screens to be cleaned, and works with the baffle plate to complete the cleaning of the clogged filter screens. The filter screens to be cleaned include filter screens of various sizes used in various types of transfer pumps.

[0006] Preferably, the water control device includes a nozzle fixedly connected to one side of the cylinder, a water supply pipe connected to the nozzle, an inlet quick-opening ball valve and a water control regulating valve installed on the water supply pipe, a water source connected to the water supply pipe, a drain pipe fixedly connected to the other side of the cylinder, an outlet quick-opening ball valve and an outlet speed regulating valve installed on the drain pipe, and a hydraulic control switch fixedly connected to one side of the cylinder.

[0007] The nozzle is welded to one side of the cylinder at a certain angle to the center line of the filter screen to be washed. The water supply pipe is threaded to the nozzle. The inlet quick-opening ball valve and the water control regulating valve are threaded to the water supply pipe. The water supply pipe is connected to a water source. The drain pipe is welded to the other side of the cylinder. The drain pipe is threaded to the cylinder. The outlet quick-opening ball valve and the outlet speed regulating valve are threaded to the drain pipe.

[0008] The hydraulic control switch is threaded onto the cylinder and controls the automatic logic switch of the water control regulating valve and the water outlet speed regulating valve.

[0009] By adopting the above technical solution, it is possible to provide filter cleaning water, ensure that the cleaning pressure is set reasonably, and accurately control the cleaning time and cleaning effect.

[0010] Preferably, the buoyancy device includes a floating sleeve fitted on a fixed rod, a float box fixedly connected to the floating sleeve, and an oil sludge basin located above the float box;

[0011] The floating sleeve is concentric with the fixed rod and can float up and down along the fixed rod. Four arc rods are welded to the inner wall of the floating sleeve to effectively reduce the friction generated when the floating sleeve floats up and down along the fixed rod. The float box is concentrically welded to the floating sleeve, and the floating sleeve leaves a certain length on the upper and lower sides of the float box. The oil basin is concentrically embedded in the floating sleeve but not fixed. The oil basin can be freely inserted into and removed from the floating sleeve, and the oil basin is covered with small circular holes.

[0012] By adopting the above technical solution, the filter screen to be washed can be dragged and rotated up and down inside the cylinder.

[0013] Preferably, the cylinder includes a fixing rod fixed to the bottom of the cylinder, a baffle plate embedded in the top of the cylinder, a rolling bearing fixed to the top of the fixing rod, and an overflow pipe fixed to the other side of the cylinder;

[0014] The cylinder and the fixed rod are concentrically welded together. The rolling bearing is welded to the top of the fixed rod, and the two are concentric. The rolling bearing supports the rotation of the filter screen at its contact with the bottom surface of the filter screen to be washed. The baffle plate is annular, with its outer circle being serrated and concentrically embedded in the cylinder. The baffle plate can be freely installed and removed from the top of the cylinder. The inner circle of the baffle plate is also serrated and concentrically embedded in the filter screen to be washed. The baffle plate can also be freely installed and removed from the bottom of the filter screen to be washed. The overflow pipe is fixedly welded to the other side of the cylinder to facilitate the overflow of cleaning water after reaching a certain level.

[0015] By adopting the above technical solution, it is possible to support all components and provide a cleaning space for the filter screen to be washed.

[0016] Preferably, the filter screen to be washed includes filter screens of various sizes from various types of pumps in offshore oil fields. The surface has a regular arrangement of mesh, and it is cylindrical in shape. It is placed upside down on a fixed rod inside the cylinder. The bottom of the filter screen to be washed is in contact with a rolling bearing. After the cleaning water is sprayed out from a nozzle at a certain angle to the axis of the fixed rod, it acts on the surface of the filter screen to be washed, and the filter screen to be washed rotates freely inside the cylinder.

[0017] By adopting the above technical solution, it is possible to clean dirty and clogged filter screens of various sizes.

[0018] Beneficial effects

[0019] Compared with existing technologies, this utility model provides an automatic cleaning device for filter screens of offshore oilfield transfer pumps. The device uses a cylindrical body to provide support and cleaning space, a buoyancy device to achieve vertical rotation and floating, and a water control device to control the cleaning time. It can efficiently clean clogged filter screens of various sizes, effectively improving upon the problems of traditional filter cleaning methods, such as long cleaning time, harsh environment, large workload, wasted manpower, and low automation. It essentially achieves self-adaptive, fully enclosed, and highly efficient fully automatic cleaning, reducing the occurrence of pump shutdowns due to untimely filter cleaning and ensuring the stable operation of offshore oil and gas processing technology. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view (AA) of the box body in this utility model;

[0022] Figure 3 This is a partial enlarged view of the central water control device of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the buoyancy device in this utility model;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the filter screen to be washed in this utility model;

[0025] Figure 6 This is a three-dimensional structural diagram of the water baffle in this utility model;

[0026] Reference numerals in the attached diagram: a) Water control device; a1) Water source; a2) Water control regulating valve; a3) Inlet quick-opening ball valve; a4) Water supply pipe; a5) Sprinkler head; a6) Hydraulic control switch; a7) Outlet speed regulating valve; a8) Outlet quick-opening ball valve; a9) Drain pipe; b) Floating device; b1) Oil sludge basin; b2) Float box; b3) Floating sleeve; c) Cylinder; c1) Fixed rod; c2) Rolling bearing; c3) Overflow pipe; c4) Water baffle; d) Filter screen to be washed. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Please see Figures 1-6 The present invention provides a technical solution: an automatic cleaning device for filter screen of offshore oilfield transfer pump, including components such as water control device a, flotation device b, cylinder c, and filter screen to be cleaned d.

[0029] In this application, the water control device a includes components such as a water source a1, a water control regulating valve a2, an inlet quick-opening ball valve a3, a water supply pipe a4, a nozzle a5, a hydraulic control switch a6, an outlet speed regulating valve a7, an outlet quick-opening ball valve a8, and a drain pipe a9. It mainly provides the cleaning water source a1 and controls the cleaning time, cleaning pressure, and cleaning effect. The water control device a is fixedly connected to the left and right sides of the cylinder c. During cleaning operations, the water control regulating valve a2, the inlet quick-opening ball valve a3, and the outlet quick-opening ball valve a8 are all open, while the outlet speed regulating valve a7 is closed. The continuous water source a1 passes through the water supply pipe a9 and the nozzle a5, directly acting on the dirty and clogged filter screen d to be cleaned.

[0030] Further explanation: After water source a1 enters the cylinder c, the liquid level continuously rises. The flotation device b floats continuously upward along the fixed rod c1 inside the cylinder due to buoyancy. Since the nozzle a5 is at a certain angle to the central axis of the filter screen d to be washed, a deflection force is generated, which drives the filter screen d to rotate and clean. The hydraulic control switch a6 installed on one side of the cylinder c continuously monitors the liquid level change. When the specified liquid level is reached, the hydraulic control switch a6 triggers the corresponding logic, controls the water control regulating valve a2 to close, controls the water outlet speed regulating valve a7 to open, and discharges liquid from the drain pipe a9. When the liquid level in the cylinder c is discharged to the specified liquid level, the logic is triggered to close the water outlet speed regulating valve a7, and the filter screen cleaning is completed.

[0031] It should be noted that during filter cleaning, the cleaning pressure and time are controlled by the inlet quick-opening ball valve A3, and the drainage speed is controlled by the outlet quick-opening ball valve A8. Additionally, when the water control regulating valve A2 and the outlet water speed regulating valve A7 malfunction, or when maintenance is required for the automatic filter cleaning device, the inlet quick-opening ball valve A3 and the outlet quick-opening ball valve A8 can also be used for pressure regulation and shut-off isolation.

[0032] In this application, the flotation device b includes components such as an oil sludge basin b1, a float box b2, and a floating sleeve b3, mainly used to drag the filter screen d to be washed to float up and down. The entire flotation device b is located at the bottom of the cylinder c, wherein the floating sleeve b3 is coaxial with the fixed rod c1, and the floating sleeve b3 is coaxially welded to the float box b2. The oil sludge basin b1 with uniformly spaced holes is placed on top of the float box b2, and the floating sleeve b3 is also coaxial with the oil sludge basin b1, but the oil sludge basin b1 can be freely removed and placed in.

[0033] To further explain, during the cleaning operation, the cleaning water continuously settles inside the cylinder c. The float box b2 and floating sleeve b3 work together, using buoyancy to push the flotation device b and the filter screen d to be washed upwards along the fixed rod c1. The oily wastewater is filtered through the oil sludge basin b1, where sludge, solid particles, and other debris fall. The oily wastewater continuously settles inside the cylinder c. After cleaning, the oil sludge basin b1 is removed, and the impurities are poured into the designated location. The settled oily wastewater is discharged through the drain pipe a9. After discharge, the flotation device b descends to the bottom of the cylinder c.

[0034] It should be noted that the inner wall of the floating sleeve b3 is fixed with four semi-circular rods, which can effectively reduce the friction between the fixed rod c1 and the floating sleeve b3 and ensure smooth up and down movement; the floating sleeve b3 protrudes slightly from the bottom of the float box b2 to ensure that the oily and sewage at the bottom of the cylinder c can be discharged smoothly.

[0035] In this application, the cylinder c includes components such as a fixed rod c1, a rolling bearing c2, an overflow pipe c3, and a baffle plate c4, mainly used to store cleaning water and support the automatic filter cleaning device. The water control device a and the overflow pipe c3 are fixed to the left and right sides of the cylinder c, the baffle plate c4 is installed at the top, and the fixed rod c1 is welded to the bottom. The rolling bearing c2 is fixed to the top of the fixed rod c1 to ensure smooth cleaning operations.

[0036] To further explain, during the cleaning operation, the cleaning water supplied by the water control device a settles inside the cylinder c, causing the flotation device b to continuously rise. The inner wall of the filter screen d to be cleaned is equipped with a rolling bearing c2, and the inner circle of the baffle plate c4 contacts the outer wall of the filter screen d. This effectively prevents the filter screen d from swaying laterally, allowing it to rotate smoothly and vertically upwards. After the filter screen is cleaned, the cleaning water stored in the cylinder c is continuously discharged through the drain pipe a9.

[0037] It should be noted that the overflow pipe c3 fixed on the cylinder c is used to overflow and discharge the high liquid level in the cylinder c in time if the cleaning water is not discharged in time during the filter cleaning process, effectively preventing the high liquid level from causing the tank to overflow; the inner and outer circles of the baffle plate c4 are welded with serrated fixed iron plates. The inner iron plate cooperates with the filter screen d to be cleaned, and the outer iron plate cooperates with the outer wall of the cylinder c, which can effectively prevent the filter screen to be cleaned from being thrown out and causing injury, forming a closed space to prevent the cleaning water from splashing everywhere, ensuring on-site operation safety and working environment.

[0038] In this application, the filter screen to be washed d includes filter screens of various sizes for various types of pumps in offshore oil fields. These are standard parts and will not be described in detail.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. An automatic cleaning device for filter screens of offshore oilfield transfer pumps, characterized in that: include Water control device (a), the water control device (a) is fixed on both sides of the cylinder (c), and a hydraulic control switch (a6) is installed on the cylinder (c) to control the water control regulating valve (a2) and the outlet speed regulating valve (a7) to achieve the switching action and supply filter screen cleaning water; A buoyancy device (b) is installed inside the cylinder (c) and rests on a fixed rod (c1) to maintain concentricity and float up and down. The cylinder (c) is used to carry the water control device (a), the flotation device (b) and the filter screen to be washed (d), and works with the baffle plate (c4) to clean the dirty and clogged filter screen; The filter screen to be washed (d) includes filter screens of different sizes for offshore oilfield transfer pumps.

2. The automatic cleaning device for the filter screen of an offshore oilfield transfer pump according to claim 1, characterized in that: The water control device (a) includes a nozzle (a5) fixedly connected to one side of the cylinder (c), a water supply pipe (a4) connected to the nozzle (a5), an inlet quick-opening ball valve (a3) ​​and a water control regulating valve (a2) installed on the water supply pipe (a4), a water source (a1) connected to the water supply pipe (a4), a drain pipe (a9) fixedly connected to the other side of the cylinder (c), an outlet quick-opening ball valve (a8) and an outlet speed regulating valve (a7) installed on the drain pipe (a9), and a hydraulic control switch (a6) fixedly connected to one side of the cylinder (c). The nozzle (a5) is welded at an inclined angle to one side of the cylinder (c), and its spray direction is towards the filter screen (d) to be washed. The water supply pipe (a4) is threaded to the nozzle (a5), and the inlet quick-opening ball valve (a3) ​​and the water control regulating valve (a2) are threaded to the water supply pipe (a4). The water supply pipe (a4) is connected to the water source (a1). The drain pipe (a9) is welded to the other side of the cylinder (c), and the drain pipe (a9) is threaded to the cylinder (c). The outlet quick-opening ball valve (a8) and the outlet speed regulating valve (a7) are threaded to the drain pipe (a9). The hydraulic control switch (a6) is threaded onto the cylinder (c) and controls the automatic logic switch of the water control regulating valve (a2) and the water outlet speed regulating valve (a7).

3. The automatic cleaning device for the filter screen of an offshore oilfield transfer pump according to claim 2, characterized in that: The buoyancy device (b) includes a floating sleeve (b3) fitted on a fixed rod (c1), a float box (b2) fixedly connected to the floating sleeve (b3), and an oil sludge basin (b1) located above the float box (b2). The floating sleeve (b3) is concentric with the fixed rod (c1) and can float up and down along the fixed rod (c1). Four semi-circular arc rods are welded to the inner wall of the floating sleeve (b3) to effectively reduce the friction generated when the floating sleeve (b3) floats up and down along the fixed rod (c1). The float box (b2) is concentrically welded to the floating sleeve (b3) and the floating sleeve (b3) has extensions on both the upper and lower sides of the float box (b2). The oil basin (b1) is concentrically embedded in the floating sleeve (b3) but not fixed. The oil basin (b1) can be freely inserted into and removed from the floating sleeve (b3) and is covered with small circular holes.

4. The automatic cleaning device for the filter screen of an offshore oilfield transfer pump according to claim 3, characterized in that: The cylinder (c) includes a fixing rod (c1) fixed to the bottom of the cylinder (c), a baffle plate (c4) embedded in the top of the cylinder (c), a rolling bearing (c2) fixed to the top of the fixing rod (c1), and an overflow pipe (c3) fixed to the other side of the cylinder (c). The cylinder (c) and the fixed rod (c1) are welded together concentrically. The rolling bearing (c2) is welded to the top of the fixed rod (c1), and the two are concentric. The rolling bearing (c2) supports the rotation of the filter screen (d) at the bottom surface where it contacts the filter screen (d). The baffle plate (c4) is annular, with its outer circle serrated and concentrically embedded with the cylinder (c). The baffle plate (c4) can be freely installed and removed from the top of the cylinder (c). The inner circle of the baffle plate (c4) is also serrated and concentrically embedded with the filter screen (d). The baffle plate (c4) can be freely installed and removed from the bottom of the filter screen (d). The overflow pipe (c3) is fixedly welded to the other side of the cylinder (c) to facilitate the overflow of cleaning water after it reaches the preset liquid level.

5. An automatic cleaning device for the filter screen of an offshore oilfield transfer pump according to claim 4, characterized in that: The filter screen (d) to be washed includes filter screens of various sizes from various types of pumps in offshore oil fields. The surface is regularly arranged with mesh, and it is cylindrical. It is placed upside down on a fixed rod (c1) inside the cylinder (c). The bottom of the filter screen (d) to be washed is in contact with the rolling bearing (c2). After the cleaning water is sprayed out from the nozzle (a5) at an angle to the axis of the fixed rod (c1), it acts on the surface of the filter screen (d) to be washed, and the filter screen (d) to be washed rotates freely inside the cylinder (c).

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