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- W2359627504 abstract "In a high energy combined perforation,the pressure gradient of detonation gas along cracks varies with time due to the influences of flow velocity,crack surface roughness and media permeability.Since the pressure gradient affects stress strength of crack top,it is unsuitable to judge crack initiation by the traditional breakdown pressure.A function describing gas pressure distribution along the crack is proposed to derive the corresponding stress strength of crack top,and then the conditions of crack initiation in borehole rocks are concluded.The conditions reflect that gas pressure gradient varies with time.The example analysis reveals that slower borehole pressurization gives rise to lower crack initiation and arrest pressure,greater extension of crack arrest time,and longer cracks in the formation." @default.
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- W2359627504 date "2005-01-01" @default.
- W2359627504 modified "2023-09-26" @default.
- W2359627504 title "Initiation and extension of existing cracks under detonation gas loading in a high energy combined perforation" @default.
- W2359627504 hasPublicationYear "2005" @default.
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