Novel sand control screen pipe with adjustable on-site sand stop precision

Abstract

The invention discloses a novel sand control screen pipe with adjustable on-site sand stop precision, and belongs to the field of oil well completion sand control. The novel sand control screen pipe mainly comprises five parts, namely a central pipe, a fixed-precision sand stop layer, an adjustable-precision sand stop layer, an outer protective sleeve and a sand stop precision precise adjusting mechanism, wherein the central pipe is provided with spirally distributed through holes and is mainly used for supporting the entire screen pipe and allowing oil to pass through; the fixed-precision sand stop layer is mainly used for controlling sand; the adjustable-precision sand stop layer can change the sand stop precision under the adjustment of the precise adjusting mechanism to play a major role in sand control; the outer protective sleeve is mainly used for protecting the internal structure of the screen pipe and reducing erosion effect of internal fluid and sand; and the sand stop precision precise adjusting mechanism is mainly used for adjusting sand stop precision of the adjustable-precision sand stop layer. Compared with the conventional sand control screen pipe with fixed sand stop precision, the adjustable-precision sand control screen pipe can realize on-site real-time design and sand stop precision adjustment aiming at the characteristics of a single well to improve the sand control effect; the novel sand control screen pipe is convenient for mass production of the screen pipe manufacturers and can precisely control the sand control precision; and the novel sand control screen pipe is convenient for screen pipe development, is convenient for suppliers to provide a sand control design, integrated service of the sand control screen pipe, and the like.

Description

technical field [0001] The invention belongs to the field of downhole drilling and production tools for petroleum, and relates to a novel sand control screen pipe with adjustable precision of sand retaining on the petroleum site. Background technique [0002] At present, the sand production of oil and gas wells has become one of the common problems in the development of unconsolidated sandstone reservoirs in the late stage of development. damage and scrapping of oil wells, etc. Sand control is the main way to solve this kind of problems. By taking sand control measures to control the formation of sand, to maintain the normal production of oil and gas wells. Among the sand control measures that are mainly used at present, mechanical sand control occupies an absolute dominant position, and mechanical sand control mainly relies on the combination of mechanical sand control screen or screen gravel packing to achieve sand retaining effect. Sand control screen is the sand retain...

AI Technical Summary

Problems solved by technology

On-site sand-retaining precision adjustable sand control screen has not been reported at home and abroad, and it is a blank

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