A three-stage filtering water feeding tank for a gas production platform

Abstract

The utility model discloses a kind of gas platform three-stage filtration water feeding tank, belong to petroleum and natural gas well drilling engineering technical field.The water feeding tank includes water feeding tank, water inlet, primary filter screen, secondary filter baffle, primary adjustable blow-off port, tertiary adjustable blow-off port and water outlet.Water feeding tank is separated into three-stage filtration space by primary filter screen and secondary filter baffle, after entering by water inlet, in turn through filter screen interception, baffle turbulence settlement and standing sediment, finally clean water is discharged by water outlet.The utility model realizes multistage continuous filtration, effectively removes impurities, and by adjustable blow-off port on-line blow-off, solve the problem of man-power consumption, long time consumption and big environmental protection risk in prior art, with the advantages of high filtration efficiency, simple operation and good environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling engineering technology, and in particular to a three-stage filtration water feeding tank for a gas production platform. Background Technology

[0002] In natural gas extraction operations, the production process of the gas production platform requires a continuous supply of compliant working water to equipment such as chemical injection pumps and heat exchangers. However, raw water or recycled water often contains solid impurities such as silt, suspended solids, hydrates, and rust fragments. If used directly, these impurities can lead to equipment wear, pipeline blockage, valve sluggishness, and other problems, increasing maintenance costs and affecting production stability.

[0003] In existing technologies, gas extraction platforms typically use independent filters or filter tanks installed in pipelines to achieve liquid filtration. This method has significant drawbacks: The filter needs to be cleaned or the filter element replaced regularly. Maintenance is frequent, especially when the impurity content is high. Operators need to perform physical labor such as system shutdown and disassembly, which affects production efficiency.

[0004] The cleaning process includes isolation, depressurization, cleaning, and reloading, which takes a long time, cannot achieve continuous filtration, and results in water supply interruption.

[0005] Oily sludge or chemical residues trapped during cleanup can easily leak, causing pollution to the platform deck or marine environment.

[0006] Therefore, there is an urgent need in the field for a multi-stage continuous filtration solution integrated inside the water tank to address the aforementioned deficiencies. Utility Model Content

[0007] The purpose of this utility model is to provide a three-stage filtration water tank for a gas extraction platform. Through integrated design, it achieves multi-stage filtration, continuous operation, and convenient sewage discharge, overcoming the problems of high manpower consumption, long time consumption, and high environmental risks in the existing technology.

[0008] This utility model is achieved using the following technical solution: a three-stage filtration water supply tank for a gas extraction platform, characterized by comprising a water supply tank, a primary filter screen, a secondary filter baffle, a primary adjustable drain outlet, and a tertiary adjustable drain outlet; the water supply tank is provided with a primary filtration space, a secondary filtration space, and a tertiary filtration space sequentially along its length; the primary filter screen is disposed between the primary and secondary filtration spaces, and the secondary filter baffle is disposed between the secondary and tertiary filtration spaces; the water supply tank has an inlet at the upper part corresponding to the primary filtration space and an outlet at the upper part corresponding to the tertiary filtration space; the primary adjustable drain outlet is disposed at the bottom of the primary filtration space, and the tertiary adjustable drain outlet is disposed at the bottom of the tertiary filtration space.

[0009] Furthermore, the primary filter screen is vertically fixed to the inner wall of the water tank, dividing its interior into the primary filtration space and the secondary filtration space; the bottom and side edges of the primary filter screen are sealed to the inner wall of the water tank, and an overflow channel is left between its top and the top wall of the water tank.

[0010] Furthermore, the height of the central axis of the water inlet is lower than the height of the top of the primary filter screen.

[0011] Furthermore, the secondary filter baffle is vertically fixed to the inner wall of the water tank, dividing its interior into the secondary filtration space and the tertiary filtration space; the two sides of the secondary filter baffle are sealed to the inner wall of the water tank, a bottom slope is formed between its bottom and the bottom wall of the water tank, and a top channel is formed between its top and the top wall of the water tank.

[0012] Furthermore, the bottom of the secondary filter baffle is provided with a bottom slope to guide the sediment.

[0013] Furthermore, the height of the central axis of the water outlet is higher than the top height of the secondary filter baffle.

[0014] Furthermore, both the primary adjustable drain outlet and the tertiary adjustable drain outlet adopt a funnel-shaped structure.

[0015] Furthermore, the primary filter screen is located at approximately one-third of the length of the water tank, and the secondary filter baffle is located at approximately two-thirds of the length of the water tank.

[0016] Furthermore, the primary filter screen is sealed and fixed to the inner wall of the water tank by welding.

[0017] Furthermore, the secondary filter baffle is sealed and fixed to the inner wall of the water tank by welding.

[0018] The three-stage filtration water supply tank for a gas extraction platform described in this utility model has the following beneficial effects: Through physical interception by the primary filter screen, turbulence and sedimentation by the secondary filter baffle, and static sedimentation in the tertiary space, impurities are gradually removed from large to small, resulting in stable effluent quality and effective protection of downstream equipment.

[0019] Integrated inside the water tank, the water flow achieves simultaneous filtration and water supply through overflow and cross-space flow, eliminating the need for downtime cleaning, ensuring continuous production, and significantly improving efficiency.

[0020] It is equipped with a primary adjustable drain outlet and a tertiary adjustable drain outlet, both funnel-shaped. The drain outlet can be opened separately according to pressure monitoring or periodic maintenance needs. The operation does not require disassembly of the equipment, reducing the intensity of manual labor and time costs.

[0021] Pollutants are collected at the bottom of the tank and discharged in a controlled manner, preventing spillage during cleanup, reducing pollution to the platform or marine environment, and meeting the requirements for clean operation.

[0022] The internal space of the water tank is optimized, and the primary filter and secondary filter baffle are fixed by welding. The bottom slope guides the sediment to collect, ensuring long-term stable operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the internal structure of a three-stage filtration water supply tank for a gas extraction platform. Figure 2 A schematic diagram of the external structure of a three-stage filtration water supply tank for a gas extraction platform; In the diagram: 1. Water inlet; 2. Primary filter screen; 3. Secondary filter baffle; 4. Primary adjustable drain outlet; 5. Bottom slope; 6. Tertiary adjustable drain outlet; 7. Water outlet; 8. Water tank. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Example 1: like Figure 1-2As shown, this embodiment provides a three-stage filtration water supply tank for a gas extraction platform, mainly composed of a water supply tank 8, a water inlet 1, a primary filter screen 2, a secondary filter baffle 3, a primary adjustable drain outlet 4, a bottom slope 5, a tertiary adjustable drain outlet 6, and a water outlet 7. The water supply tank 8 is a horizontally placed cylindrical or rectangular cylinder, and its interior is divided into a primary filtration space, a secondary filtration space, and a tertiary filtration space by the primary filter screen 2 and the secondary filter baffle 3.

[0028] An inlet 1 is located above the primary filtration space inside the water tank 8. The inlet 1 is positioned below the top of the primary filter screen 2, ensuring that water flows into the primary filtration space first. The primary filter screen 2 is vertically fixed to approximately one-third of the length of the water tank 8. Its bottom and side edges are sealed to the inner wall of the water tank 8 by welding, but a through space of approximately one-tenth of its height is reserved at the top for water overflow. The primary adjustable drain 4 is located at the bottom of the primary filtration space of the water tank 8. It is funnel-shaped and used to collect and discharge larger particles of impurities that settle in this space.

[0029] The secondary filter baffle 3 is vertically fixed to the interior of the water tank 8 at approximately two-thirds of its length. Its two edges are sealed to the inner wall of the water tank 8 by welding, with a bottom channel approximately one-tenth of its height and a top channel approximately one-fifth of its height reserved. The bottom of the secondary filter baffle 3 is designed as a slope 5 to facilitate the guidance of sediment to collect in a specific direction. The area between the primary filter screen 2 and the secondary filter baffle 3 forms a secondary filtration space, where water flows through the baffle and settles.

[0030] An outlet 7 is located above the three-stage filtration space inside the water tank 8. The outlet 7 is positioned higher than the top of the secondary filter baffle 3, ensuring that only the clear liquid from the upper layer after three-stage filtration can be discharged. The three-stage adjustable drain 6 is located at the bottom of the three-stage filtration space of the water tank 8. It is funnel-shaped and used to collect and discharge fine impurities that settle in this space.

[0031] During operation, production water containing impurities first enters the primary filtration space through inlet 1. The primary filter screen 2 physically intercepts large suspended solids in the water, such as plastic flakes or large pieces of moss. As the liquid level rises, the water overflows from the reserved space at the top of the primary filter screen 2 into the secondary filtration space. In the secondary filtration space, the water flows around the secondary filter baffle 3. Due to the change in the flow channel cross-section and the baffle obstruction, the water flow velocity decreases and turbulence is generated, causing medium-sized particles such as fine sand to settle. Part of the water flows horizontally through the channel at the bottom of the baffle, while another part overflows from the channel at the top of the baffle, achieving mixing and secondary sedimentation. Subsequently, the water enters the tertiary filtration space, where the water flow velocity further decreases, entering a settling stage. The finest suspended particles, such as silt or rust, slowly settle to the bottom under gravity and are guided by the bottom slope 5 to converge near the tertiary adjustable drain outlet 6. Finally, the clean water after three stages of filtration is discharged from outlet 7 and supplied to subsequent equipment.

[0032] When wastewater discharge is required, the primary adjustable drain port 4 and the tertiary adjustable drain port 6 can be opened separately to discharge the concentrated impurities collected in their respective filtration spaces from the system. The primary adjustable drain port 4 mainly discharges large particulate impurities accumulated in the primary filtration space, while the tertiary adjustable drain port 6 discharges fine deposits from the tertiary filtration space. The entire process requires no shutdown or disassembly of the equipment, achieving online, continuous, and efficient filtration and wastewater discharge operations. This significantly reduces manual labor intensity and maintenance time, while also avoiding the environmental risks caused by pollutant spillage.

[0033] Through the above structural design, the water tank achieves multi-stage progressive filtration, effectively removing impurities of different particle sizes and ensuring stable effluent quality. The integrated design allows filtration and water supply to proceed simultaneously, improving production efficiency, and the controllable sewage discharge operation ensures cleanliness and system safety.

[0034] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A three-stage filtration water feeding tank for a gas extraction platform, characterized in that, The water tank (8) comprises a primary filter screen (2), a secondary filter baffle (3), a primary adjustable drain outlet (4), and a tertiary adjustable drain outlet (6). The water tank (8) is provided with a primary filtration space, a secondary filtration space, and a tertiary filtration space in sequence along its length. The primary filter screen (2) is located between the primary filtration space and the secondary filtration space, and the secondary filter baffle (3) is located between the secondary filtration space and the tertiary filtration space. The water tank (8) has an inlet (1) at the upper part corresponding to the primary filtration space and an outlet (7) at the upper part corresponding to the tertiary filtration space. The primary adjustable drain outlet (4) is located at the bottom of the primary filtration space, and the tertiary adjustable drain outlet (6) is located at the bottom of the tertiary filtration space.

2. The three-stage filtration water supply tank for a gas extraction platform according to claim 1, characterized in that, The primary filter screen (2) is vertically fixed to the inner wall of the water tank (8), dividing its interior into the primary filtration space and the secondary filtration space; the bottom and side edges of the primary filter screen (2) are sealed to the inner wall of the water tank (8), and an overflow channel is left between its top and the inner top wall of the water tank (8).

3. The three-stage filtration water supply tank for a gas extraction platform according to claim 2, characterized in that, The height of the central axis of the inlet (1) is lower than the height of the top of the primary filter screen (2).

4. The three-stage filtration water supply tank for a gas extraction platform according to claim 1, characterized in that, The secondary filter baffle (3) is vertically fixed to the inner wall of the water tank (8), dividing its interior into the secondary filtration space and the tertiary filtration space; the two sides of the secondary filter baffle (3) are sealed to the inner wall of the water tank (8), and a bottom slope (5) is formed between its bottom and the inner bottom wall of the water tank (8), and a top channel is formed between its top and the inner top wall of the water tank (8).

5. A three-stage filtration water feeding tank for a gas extraction platform according to claim 4, characterized in that, The bottom of the secondary filter baffle (3) is provided with a bottom slope (5) to guide the sediment.

6. A three-stage filtration water feeding tank for a gas extraction platform according to claim 5, characterized in that, The height of the central axis of the outlet (7) is higher than the top height of the secondary filter baffle (3).

7. A three-stage filtration water feeding tank for a gas extraction platform according to claim 1, characterized in that, Both the primary adjustable drain outlet (4) and the tertiary adjustable drain outlet (6) adopt a funnel-shaped structure.

8. A three-stage filtration water feeding tank for a gas extraction platform according to claim 1, characterized in that, The primary filter (2) is located at approximately one-third of the length of the water tank (8), and the secondary filter baffle (3) is located at approximately two-thirds of the length of the water tank (8).

9. A three-stage filtration water feeding tank for a gas extraction platform according to claim 2, characterized in that, The primary filter screen (2) is sealed and fixed to the inner wall of the water tank (8) by welding.

10. A three-stage filtration water feeding tank for a gas extraction platform according to claim 4, characterized in that, The secondary filter baffle (3) is sealed and fixed to the inner wall of the water tank (8) by welding.

Images