Multilayer filter net pipe of petroleum pipe

Abstract

The invention discloses a multilayer filter net pipe of a petroleum pipe. A center main pipe, an outer protective casing and filter net core pipes are arranged; the center main pipe (2) is in a shapeof a drilled sieve pipe with sieve holes being drilled in a pipe body section; a pipe body of the drilled sieve pipe of the center main pipe (2) is externally connected with the 1-6 layers of filter net core pipes (4) in a wrapped mode; the filter net core pipes (4) are externally connected with the outer protective casing in a wrapped mode; the two ends of the outer protective casing and the filter net core pipes (4) are fixedly connected with linkage rings (3); and the linkage rings (3) are fixedly connected to a pipe body of the center main pipe (2). When being used, the multilayer filter net pipe is the same as an existing oil well sieve pipe with the filtering function, according to design requirements, the two ends are assembled on an oil production well casing, and then operation ofoil production, sand prevention and filtering can be conducted.

Description

technical field [0001] The invention belongs to the technical field of oil transportation, and relates to a multi-layer filter screen pipe for oil pipes. Background technique [0002] With the continuous development of oil and natural gas extraction industry and the rapid advancement of science and technology, the technical requirements for oil extraction equipment are also getting higher and higher. In the exploitation of oil and natural gas, due to the limitation of the underground oil layer environment, especially in order to improve the quality of the crude oil produced, an oil well screen with filter is usually installed at the set position of the oil production well pipe. In the known technology, the existing oil well screens with filtration are mainly drilled screens with sieve holes drilled in the pipe body, slotted screens with slits cut in the pipe body, and wound screens wound on the support frame. There are trapezoidal wire-wound screens, etc., due to structural...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing technology, solve the problem that the existing oil well screen with filter has a complicated structure, and the filter layer is easily deformed and affects the filtering effect.

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