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Multi-stage filter for oil wells

A kind of filter and oil well technology, applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of unsatisfactory, poor filtering function, short service life, etc., and achieve convenient use conditions, reasonable structure, strong filter effect

Inactive Publication Date: 2013-09-11
WUXI JINDING OIL PIPE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the current petroleum screen is too simple. Generally, strip or hole-shaped screens are processed on the surface of the pipe, and some screens are made of stainless steel wire after drilling. Obviously, its filtering function is relatively poor. Poor, unable to filter in layers, unable to meet industrial needs; in addition, the current screen tube function is too single, can only perform screening operations, but cannot carry out normal transportation work, cannot meet people's needs, poor heat preservation effect, and is not durable Corrosion, short service life

Method used

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  • Multi-stage filter for oil wells

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Embodiment Construction

[0011] Such as figure 1 As shown, the oil well multistage filter according to the embodiment of the present invention includes an outer shell 1, the upper and lower bottom surfaces of the outer shell 1 are respectively equipped with sealing covers 2 and the upper end of the outer shell 1 is connected to the oil inlet pipe, and is located on the outer wall of the outer shell 1 There are two filter tubes 3 on the top, and each filter tube 3 is respectively perpendicular to the side wall of the outer shell 1; a rotating filter ball 5 is installed inside each filter tube 3 through a rotating shaft 7, and is located at the outer end of each filter tube 3. Buckle the cover 4 and add a mesh type filter belt 6 in the cavity between the rotary filter ball 5 and the buckle cover 4. At the same time, a second-stage filter screen 12 is horizontally arranged at the inner center of the outer shell 1. The filter inner cavity 8 above the second-stage filter screen 12 is provided with a first-...

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Abstract

The invention discloses a multi-stage filter for oil wells. The multi-stage filter comprises a shell. Two filter tubes are mounted on the outer-side wall face of the shell. A rotary filter ball is mounted inside each filter tube through a rotary shaft. A cover is disposed at the outer end of each filter tube. A mesh type filter strip is added in a cavity between each rotary filter ball and the corresponding cover. A secondary filter screen is horizontally disposed at the center in the shell. A primary filter screen is disposed in a filter cavity above the second filter screen. An oil outlet pipe with a valve is connected to the lower end of the shell. By the various filter structures such as the filter balls, the filter strips and the filter screens, the multi-stage filter is reasonable in structure, convenient, practical, high in filter effect, capable of filtering petroleum in a layered manner, and capable of providing convenience in use.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to an oil well multistage filter. Background technique [0002] At present, pipe fittings used in petroleum, chemical industry, electric power, shipbuilding, metallurgy, machinery, textile, food, construction, pharmaceutical and other industries need to have high strength, pressure resistance, corrosion resistance and high temperature resistance. Therefore, in petroleum In the field of mining technology, in order to improve the recovery rate of oilfield crude oil, secondary oil recovery and tertiary oil recovery are usually carried out. The screen pipe is installed at the bottom of the oil well to separate the extracted oil from the sand in the formation A special pipe. However, the structure of the current petroleum screen is too simple. Generally, strip or hole-shaped screens are processed on the surface of the pipe, and some screens are made of stainless steel wire afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/34
Inventor 沈金章
Owner WUXI JINDING OIL PIPE FITTINGS
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