Layering process pipe string

Abstract

Disclosed is a layering process pipe string. In order to overcome the shortcoming that an existing oil well with serious interlayer interference enables oil production not to be smoothly carried out, and an existing separate production technology cannot meet the production needs, a packer I, a safety joint I, a screen pipe I, a sealing working cylinder I, a safety joint II, a packer II, a safety joint III, a sealing working cylinder II, a screen pipe II and a pipe plug are sequentially and fixedly connected from top to bottom through oil pipes; the packer I is arranged above an upper oil layer, and the packer II is arranged between the upper oil layer and a lower oil layer; the screen pipe I is arranged on the upper oil layer, and the screen pipe II is arranged on the lower oil layer; and the inner diameter of the sealing working cylinder I and the inner diameter of the sealing working cylinder II are smaller than the inner diameter of the oil pipes. The layering process pipe string has the beneficial effects that the structural design is reasonable, the pipe string is matched with lifting pipe strings of different types so as to avoid interlayer interference, and per-well production and the production limitation are effectively improved.

Description

technical field [0001] The invention relates to a crude oil production and recovery pipe string, in particular to a layered process pipe string. Background technique [0002] The geological structure of the oilfield is complex, and most blocks have problems such as long production intervals of oil wells, multiple layers, high reservoir variation coefficients, and high comprehensive water cuts, which lead to serious interlayer interference and difficult crude oil extraction, resulting in unsmooth oil production. At present, there is an urgent need for a process technology that can effectively develop each oil layer, avoid interlayer interference, fully tap oil well productivity, increase oil well output, and improve development timeliness. Contents of the invention [0003] In order to overcome the problems that the oil production of existing oil wells with serious interlayer interference cannot be carried out smoothly, and the existing separate recovery technology cannot m...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems that the oil production of existing oil wells with serious interlayer interference cannot be carried out smoothly, and the existing separate recovery technology cannot meet the needs of production, the present invention provides a layered process string

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