摘要
随钻扩眼技术存在着钻柱动力学稳定性差、扩眼效果不理想等问题。为了解钻压、转速对大斜度小井眼随钻扩眼钻井中的影响,基于有限元分析方法,通过模拟双中心钻头随钻扩眼作业过程(将?149.2mm大斜度井眼扩至?170mm井眼),建立了适合大斜度小井眼随钻扩眼钻柱动力学分析模型,模拟了不同钻压、转速下全钻柱关键位置处钻杆运动状态、扭转角速度、有效应力随时间的变化,据此优化现场随钻扩眼作业中的钻压和转速,为随钻扩眼措施的制定提供理论支持。
Reaming while drilling（RWD） technology has some disadvantages in drilling operations, such as poor stability in drill string dynamics, non- ideal reaming effect. In order to learn how the WOB（weight on bit） and ROP（rate of penetration） affect the process of RWD operation, based on finite element method（FEM）,the paper simulated the reaming process of double center bit（to enlarge highly declined well hole from Φ149.2mm toΦ170mm）, and built the RWD drilling string dynamic model to simulate the varying tendency of drill string motion state, torsion angular rate and stress with time at the vital location of drilling string under different WOB and ROP. The results are helpful to optimize RWD technological applications and provide theory supports for RWD drilling operations.
出处
《西部探矿工程》
CAS
2015年第2期20-23,共4页
West-China Exploration Engineering
基金
超深深井开窗侧钻钻井技术配套(编号:2011ZX05049-002-002)
关键词
随钻扩眼
动力学模型
钻压
转速
reaming while drilling（RWD）
dynamic model
WOB
ROP
