A selective plugging process string for screen completion

Abstract

The invention discloses a selective plugging process pipe string for screen completion, which comprises an outer pipe string, a first inner pipe string and a second inner pipe string which are sleeved inside the outer pipe string and can be used in conjunction with the outer pipe string. Layer pipe string and the third inner layer pipe string; the outer layer pipe string includes a plurality of screen assemblies arranged at intervals in the production casing from bottom to top; the first inner layer pipe string includes a solid plug; the second inner layer pipe string The column includes an oil pipe and at least two hollow plugs arranged at intervals outside the oil pipe; the third inner pipe string includes a sealing return sleeve, an oil pipe, and a hollow plug connected sequentially from top to bottom; the solid plug and the hollow plug Slips are provided on the outer wall surface; a sealing rubber layer is provided on the outer wall surface of the sealing tieback; the string of the selective plugging process of screen completion is simple in structure, low in cost, safe in construction and high in reliability. The inner string with different plugging functions is used to cooperate with the outer string to achieve precise and selective plugging of layers.

Description

technical field [0001] The invention relates to the technical field of screen tube completion, in particular to a selective plugging process string for screen tube completion. Background technique [0002] At present, in screen completion operations, due to complex conditions such as geological conditions and development benefits, reservoirs located in different layers in the same production well may no longer meet the development requirements due to different reasons. Therefore, according to production Demand requires selective mining of different horizons. Therefore, it is necessary to design a set of plugging process string with selective recovery function to provide conditions for the realization of selective plugging in screen completion. Contents of the invention [0003] The object of the present invention is to provide a screen completion selective plugging process string that can be used for the screen completion operation of selectively exploiting reservoirs in ...

AI Technical Summary

Problems solved by technology

[0002] At present, in screen completion operations, due to complex conditions such as geological conditions and development benefits, reservoirs located in different layers in the same production well may no longer meet the development requirements due to different reasons. Therefore, according to the production Demand requires selective mining of different horizons

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