Based on the brief conclusion on downhole accidents in coring drilling and the prevention ideas, the prevention measures for the most common bit freezing and burying accidents in deep hole drilling are mainly discussed.
李粤南.深部孔段卡、埋钻事故防治对策的探讨[J].钻探工程,2011,38(9):2-5. LI Yue-nan. Discussion of Prevention Measures for Bit Freezing and Burying Accidents in Deep Borehole[J]. Drilling Engineering, 2011,38(9):2-5.