Filter cap sieve tube filtration device

By using inclined speed bumps and anti-collision devices to reduce the impact of mud and sand, combined with backwashing and gas phase separation, the problems of mud and sand blockage and gas discharge are solved, achieving efficient oil filtration and equipment protection.

CN224270343UActive Publication Date: 2026-05-26SHENGLI OIL FIELD XINDA PIPE IND TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENGLI OIL FIELD XINDA PIPE IND TECH DEV CO LTD
Filing Date
2025-04-30
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing oil filtration devices, silt and sand easily clog the screen tubes and filter holes during the process, causing wear on the screen tubes. Furthermore, the existing backwashing method is insufficient to remove silt and sand from the filter holes, resulting in decreased filtration efficiency. At the same time, the inability of gas to be discharged in a timely manner affects the flow and may damage the device.

Method used

The system employs a combination of inclined speed reducers, inclined flow baffles, anti-collision devices, anti-collision caps, and perforated protective sleeves to reduce the impact of mud and sand. During backwashing, a screw-driven sealing scraper removes impurities from the surface of the screen tube, and a gas phase preliminary separator and discharge pipe are provided to discharge gas.

Benefits of technology

It effectively removes large particulate impurities, improves the removal rate of mud and sand, extends the life of screen tubes, prevents air blockage, ensures smooth oil flow, and improves filtration efficiency and equipment stability.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224270343U_ABST
    Figure CN224270343U_ABST
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Abstract

This utility model relates to the field of petroleum filtration technology, specifically a filter cap screen tube filtration device. The filter cap screen tube filtration device includes a filtration chamber, which is connected to a gas-phase preliminary separator via a connecting elbow. An inlet pipe is connected to the filtration chamber. A screen tube is installed inside the filtration chamber, and a perforated protective sleeve is installed on the outside of the screen tube. A filter cap coarse filter screen is installed inside the connecting elbow and is connected to the screen tube. This device, through the coordinated action of an inclined deceleration plate, an inclined flow baffle, a collision preventer, a collision preventer end cap, and a perforated protective sleeve, reduces the impact of sediment on the screen tube and removes large particulate impurities. During backwashing, a screw drives a sealing scraper to scrape away impurities from the screen tube surface, including sediment that is difficult to remove between the filter holes, ensuring the filtration performance of the screen tube and extending its service life.
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