Screen pipe multi-layer outer protection pipe

Abstract

The invention discloses a screen pipe multi-layer outer protection pipe which is provided with a center main pipe, an outer projective jacket pipe and filter screen core pipes. The center main pipe isthe screen pipe type center main pipe (2) with screen holes drilled in the pipe body, and the drilling hole screen pipe body of the center main pipe (2) is externally connected with 1-6 layers of thefilter screen core pipes (4) in a wrapped mode. The filter screen core pipes (4) are externally connected with the outer projective jacket pipe in a wrapped mode. The two ends of the outer projectivejacket pipe and the filter screen core pipes (4) are fixedly connected with connection rings (3), and the connection rings (3) are fixedly connected to the pipe body of the center main pipe (2). Whenthe screen pipe multi-layer outer protection pipe is adopted, as an existing filtering oil well screen pipe, the two ends of the screen pipe multi-layer outer protection pipe are assembled to an oilproduction well pipe according to design demands, and then oil production sand prevention filtering operation can be conducted.

Description

technical field [0001] The invention belongs to the technical field of petroleum transportation, and relates to a multi-layer outer protection pipe of a screen pipe. 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 t...

AI Technical Summary

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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