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Abstract£ºCrevice near the well is contorted during drilling and completion,It will be influence the fracturing working. Hydraulic Jet flow technique takes advantage of the hydraulic perforating and hydraulic fracturing technologies,it will eliminate the formation plugging, adjust annular ayer stress near the well,in the other hand, it will extend the micro-crevice through increasing pressure,and improve penetrability. The paper described the technique about its current situation,principles and processes, introduced technical characteristics and then analyzed the hydraulic jet technique used in coal-bed methane exploitation,It will offer a new method of increasing production.

Key words£ºHigh Pressure Hydraulic Jet technique Coal-bed Methane

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