卡点计算表钻头深度（m）钻具直径钻具壁厚K值（mm）（mm）（KN）（KN）（cm）（KN）（cm）（KN）悬重一次悬重一次伸长二次悬重二次伸长三次悬重1870350012712788.988.988.973.0249.197.526.459.3511.45.512714.279592.766350.849490.707582.877245.5056008006006006006007209807207207207202525252525258001200800800800800444444444444900900900900900900三次伸长（cm）卡点深度（m）701569.34701187.4570770.8498701078.13701280.63770539.3983
