冻土钻孔内的温度分布——冻土钻探专题之一

Temperature Distribution in the Borehole drilled in Frozen Formation —PartⅠ of the Subject on Drilling in Frozen Formation

摘要:

分析了冻土钻孔中温度分布的意义，提出了孔内温度的数学模型，计算了钻头破碎岩石产生的温度增量，指出了防止钻孔坍塌的条件。

Abstract:

The significance of the temperature distribution in the borehole drilled in frozen formation is analyzed. The mathematic model of the borehole temperature distribution is presented. The temperature increment caused by rock fragmentation is calculated. And the condition preventing the borehole from collapse is put forward.