普光气田岩石坚硬,研磨性强,可钻性差,易井斜,而且常发生井漏等井下复杂情况。气体钻井技术成功解决常规泥浆钻井机械钻速低、钻井周期长、井漏等井下复杂多等问题。但气体钻井造成钻具使用寿命短,钻具失效严重,对气体钻井过程中钻具失效原因进行细致分析,并提出具体预防措施,能够较好的解决钻具失效的难题。 Puguang gas field hard rock, grinding strong, poor drillability, easy deviation, but also often happen underground well and other complex situations. Gas drilling technology has successfully solved the problems of low drilling rate, long drilling period and well leakage in conventional mud drilling machines. However, the gas drilling results in short service life of the drilling tools and serious failure of the drilling tools. Detailed analysis is made on the causes of failure of the drilling tools during the gas drilling process, and specific preventive measures are put forward, which can well solve the problem of the drilling tool failure.