| Deep volcanic rock formation drilling at the present time the poor drillability,large dip Angle,hole deviation control difficulty is high,the formation fracture development,severe leakage,and poor stability of borehole wall technical difficulties,from the bit type and structure improvement,form a complete set of underbalanced drilling technology and application of the composite drilling techniques,strengthening the plugging technology measures and so on several aspects,has carried on the deep volcanic rock formation fast drilling optimization matching technology research,formed a set of efficient form a complete set of technical measures of improve the deep volcanic rock formation drilling speed.Field application shows that by using this set of technical measures,volcanic rock formation drilling speed are improved obviously.Finally pointed out that the deep volcanic rock fragmentation mechanism,form a complete set of underbalanced drilling technology and plugging technology research,is the deep volcanic rock formation drilling technology research direction. |