打井钻孔是在地面上干地下用眼睛看不到的活，又是机械作业，很容易发生故障，必须及时找出原因和及时处理。一、回转式并机卡住钻头的处理在地质硬层向软层过渡的地段，仍快速加大压力正常钻进，钻头钻入硬层下易被卡住。应先向下少钻，待钻头活动后，再向上慢慢回钻，经几次 Well drilling is drilled on the ground with the eyes can not see the live, but also mechanical operations, it is prone to failure, we must promptly find out the reasons and timely treatment. First, rotary and stuck drill bit processing Hard layer in the geological transition to the soft section, the pressure is still rapidly increasing normal drilling, drill bit into the hard floor easily stuck. Should be less downward drilling, until the drill activities, and then slowly back up drill, after several times