定向钻进套铣打捞钻杆的设计

通过对常用定向钻进配套钻具打捞工艺的对比分析，明确了采用套铣打捞工艺处理煤矿井下近水平定向钻进中出现的塌孔、卡钻、埋钻等孔内事故的可行性与实用性。根据其工艺施工要求，结合煤矿井下近水平定向钻进系统配套钻具具体参数，研制了能够满足额定扭矩6000 N·m钻机使用要求的定向钻进套铣打捞钻杆。成庄矿的应用表明，采用套铣打捞工艺处理近水平定向钻进时孔内事故（塌孔、卡钻、埋钻等）可行性较强，且套铣打捞钻杆结构设计合理，能满足套铣打捞工艺的使用要求。

Design of Sleeve Fishing Rod for Directional Drilling

By the comparative analysis on the common fishing technologies of matching tools for directional drilling, the feasibility and practicability of sleeve fishing technology are made clear for handling the hole accidents in nearly horizontal directional drilling. According to the requirements of the construction technology and based on the specific parameters of the drilling tools in nearly horizontal directional drilling, the sleeve fishing rod for directional drilling is developed, which can match the rig with rated torque 6000N·m. The successful application in Chengzhuang coalmine proved the feasibility of sleeve fishing technology which can satisfy the application requirement with the rational structure.