ZHANG Xiao-hong. THE APPLICATION OF FOAM DIAMOND WIRE LINE DRILLING IN COAL-FIELD AND DISCUSSION OF SOME PROBLEMS[J]. COAL GEOLOGY & EXPLORATION, 1994, 22(2): 55-60.
Citation: ZHANG Xiao-hong. THE APPLICATION OF FOAM DIAMOND WIRE LINE DRILLING IN COAL-FIELD AND DISCUSSION OF SOME PROBLEMS[J]. COAL GEOLOGY & EXPLORATION, 1994, 22(2): 55-60.
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THE APPLICATION OF FOAM DIAMOND WIRE LINE DRILLING IN COAL-FIELD AND DISCUSSION OF SOME PROBLEMS

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  • The small diameter foam diamond wire line drilling tests have first been made using the equipments and circulation system made in China. The maximum hole depth is 217.74 m. The variation laws of main parameters are obtained through the tests by analyzing the drilling rate, the pressure fall and so on. It is of current significance to apply foam nush technique to wire line drilling in coal-field for increasing the drilling rate.
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