泥晶灰岩地层孔壁坍塌掉块现象及处理

Treatment to Wall of Hole Collapsing and Breaking in Mud-crystal Limestone Layer

在灰岩地区钻探施工过程中,常见孔壁坍塌、掉块现象,尤其在含泥晶灰岩地层分布区钻进过程中,这种现象尤为突出,轻则影响钻探施工效率,重则造成钻探孔内事故。针对孔内坍塌、掉块现象的征兆及特点,提出了相对应的处理办法。

Wall of hole collapsing and breaking often happen in the process of drilling in limestone area, especially in mudcrystal limestone. It can affect the efficiency of drilling and even cause accidents. The relevant methods are put forward according to the evidences and features of collapsing and breaking, and can be referred by relative enterprises.