利用岩石三轴抗压强度优选PDC钻头  

Selection of polycrystalline diamond compact bits based on triaxial compressive strength of rock

作　　者：张召平[1] 苏新亮[2] 葛洪魁[3] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061 [2]中国石油大学石油天然气工程学院,北京102249 [3]中国地震局地球物理研究所,北京100081

出　　处：《石油大学学报（自然科学版）》2005年第6期38-40,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：国家杰出青年科学基金(50125413);国家自然科学基金重点资助项目(50234030)

摘　　要：岩石三轴抗压强度是表征地层抗钻性质的重要参数之一,是PDC钻头优选的基础和主要依据。利用测井资料获取地层岩石三轴抗压强度并进行聚类分层处理,建立了PDC钻头切削结构参数与岩石三轴抗压强度之间的定量关系,提出了基于岩石三轴抗压强度的PDC钻头优选方法。通过实例计算得出了311.2 mm PDC钻头切削结构参数设计结果。该方法可为现场PDC钻头优选提供必要的理论依据,具有一定的实用性。The triaxial compressive strength of rock is one of the most important formation parameters of drillability, and is the principal basis of polycrystalline diamond compact（PDC） bits selection. The triaxial compressive strength of rock was obtained by logging data, which was analyzed by the clustering analysis method. And the quantitative relationship between the cutting parameters of PDC bits and the triaxial compressive strength of rock was established. Based on the triaxial compressive strength of rock, a selection method of PDC bits was presented. The cutting parameters of a PDC bit with a diameter of 311.2 rnm were calculated by this method, and the calculated results show that this method can serve necessary theoretical basis for PDC bits selection of field and is easy to be applied.

关 键 词：岩石三轴抗压强度 PDC钻头 切削参数 优选方法 

分 类 号：TE21[石油与天然气工程—油气井工程]