摘要
随着石油勘探开发技术的不断进步,旋转导向钻井系统在现代钻井中的应用越来越多。但当面临更加复杂及曲率更高的井身结构时,单依靠Xceed指向式旋转导向工具不能完全满足钻井作业的要求。针对这一情况,提出一种特殊保径结构的PDC钻头,其特殊在于上部1 in标准保径,下部3 in保径为0.6°倒角保径。经过计算机模拟分析,这种PDC钻头相较于常规PDC钻头不但可以提高钻具组合的造斜能力还能提高钻具工作稳定性。在渤海油田现场使用表明,这种特殊保径结构的PDC钻头具有更强的造斜能力,保证旋转导向工具和其它井下工具稳定性,减缓井下仪器由于井下震动导致的失效。
With the progress of oil exploration and development technology, rotary steerable drilling system is more and more applied in modern drilling. But when faced with more complex and higher curvature wellbore structure, the drilling operation requirements can not be fully met only by Xceed rotary steerable tools. In view of this situation, a special PDC bit with gauge structure was put forward, whose special lies in lin standard gage in upper gage and 3in in lower gage with 0.6 degree taper. The computer simulation analysis shows that this PDC bit can not only improve the ability of BHA whipstoeking, but also improve the drilling tool operation stability compared with conventional PDC bit. The field application in Bohai oilfield indi- cates the stronger whipstoeking capacity of this PDC bit with special gauge structure to ensure the stability of rotary steerable tool and other downhole tools and slow down the downhole instrument failure caused by underground vibration.
出处
《探矿工程（岩土钻掘工程）》
2016年第8期58-63,共6页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国家科技重大专项"海上稠油油田高效开发示范工程"(编号:2011ZX05057)
