Treatment of the drill rod sticking and burying incident in a multi-branch horizontal drilling in the Ordovician limestone aquifer of Dongpang Mine

Abstract:

In recent years, with the continuous development of directional drilling technology, measurement while drilling (MWD) technology and the manufacturing process of controlled directional positive displacement motor (PDM) drill have become increasingly mature. Surface directional horizontal drilling is widely used in oil, gas, shale gas, salt and other fields. The application of surface directional horizontal branch hole grouting to prevention and control of water in coal mines has been widely promoted. In the drilling process, various incidents cause a large number of human, material and financial losses, and even lead to the abandonment of the whole well and casualties. Therefore, taking proper measures to reduce or avoid incidents and ensure the smooth progress of the drilling work is an important task for drilling engineering. In this paper, in the context of successful treatment of the drill rod sticking and bruying incident during drilling the DB2-E3 directional horizontal well in the first stage of grouting transformation of the Ordovician limestone aquifer in the 9400 mining area of Dongpang Mine by Jizhong Energy Resources Co., Ltd., the preventive measures of the drill rod sticking and bruying incident in the horizontal grouting hole are summarized, providing some guide for the safe construction of the horizontal well.