论文部分内容阅读
钻井法凿井是采用大型钻井机经一次或几次扩孔施工竖井井筒的方法,钻井底部井壁底结构承受最大的水泥浆压力,容易发生破坏。根据钻井井壁底飘浮下沉中的实际工况建立模型,采用ANSYS计算软件对削球式和椭圆回转式2种井壁底的力学性能进行有限元分析,分析2种井壁底的应力分布规律和受力的主要影响因素,同时选取受力形式相对较好的削球式和椭圆回转式模型进行关键点受力比较,提出了对深厚表土层钻井井壁底的最佳结构形式,为今后采用钻井设计与施工时选择最佳井壁底结构形式提供参考。
Drilling well drilling is the use of large-scale drilling machine after reaming one or several shaft shaft method, the bottom wall structure of the bottom of the well to withstand drilling mud pressure, prone to damage. According to the actual working conditions of the floating shaft sinking in the bottom of the well, the finite element analysis of the mechanical properties of the bottom of the two kinds of slicing and elliptical rotary shafts was carried out by ANSYS software. The stress distribution in the two kinds of shaft bottom Law and force of the main influencing factors at the same time select the force form relatively good chipping and elliptical rotary model for the comparison of the force at the key point, proposed for the deep topsoil drilling shaft bottom of the best structural forms of In the future, it will provide references for choosing the best form of shaft bottom structure when drilling design and construction.