摘要
Power V自动垂直钻井系统等主动防斜打直技术已在钻井液钻井中得到了广泛应用,但气体钻井过程中也容易发生井斜,由于气体钻井过程中钻柱内外压差较低,无法开启现有垂直钻井工具的推靠机构,目前还没有成熟的气体钻井主动防斜打直技术。随着气体钻井技术在国内深井超深井提速中的广泛应用,急需研发适用于气体钻井的自动垂直钻井系统。根据钻井液钻井的自动垂直钻井系统基本原理,利用气体动力学特点,设计了一种分流式自动垂直钻井工具。该钻井工具基于气体动力学原理和流固耦合分析方法,利用分流气体方法,将分流喷射的反作用力用于调节钻头侧向力,实现了自动感应井斜及纠斜,达到了垂直钻井的目的。理论分析证明,利用该钻井工具可以实现气体自动垂直钻井。
Power V system,an active control automatic vertical drilling technology,is widely used in drilling using drilling fluid,while borehole inclination easily happens during gas drilling process.The sidewall contact devices of vertical drilling tool can＇t open because of the small differential pressure between inside and outside drilling string.There is no proven active inclination control technology for gas drilling at present.With the widely use of gas drilling technology in domestic ultra-deep well,automatic vertical gas drilling system is highly needed.According to the theory of automatic vertical drilling system in mud drilling and characteristics of gas dynamics,a lateral-jet type automatic vertical gas drilling system is developed.Based on gas dynamics and fluid-solid coupling analysis,the automatic sensing and correction was realized using the reverse force of gas lateral jet flow.The automatic vertical gas drilling was achieved.The analysis proves that this tool can be used for automatic vertical gas drilling.
出处
《石油钻探技术》
CAS
北大核心
2010年第6期15-19,共5页
Petroleum Drilling Techniques
基金
国家高技术研究发展计划("863"计划)项目"超深井钻井技术研究"(编号:2006AA06A109)部分研究成果
关键词
气体钻井
垂直钻井
物理模型
流场
压力分布
gas drilling
vertical drilling
physical model
flow field
pressure distribution
