随钻扩眼工具及技术研究

基于随钻扩眼技术优势的分析，研究了机械式、液压式和偏心式随钻扩眼工具执行机构和扩眼总成的机构原理，并介绍了国内所开展的相关研究。文章提出应加强现有工具的适应性和匹配性研究，发掘各类工具的优势。优化执行机构、扩眼总成和水力机构、重视底部钻具组合力学特性的分析是今后发展和完善随钻扩眼工具及技术的几个重要内容。实践表明，随钻扩眼技术在处理井下复杂情况、降低钻井综合成本、提高钻井速度、提高建井质量和安全性等方面具有显著的优势，随钻扩眼工具也正逐渐成为一种重要的石油钻井配套工具。

STUDY ON TOOLS AND TECHNIQUES OF REAMING WHILE DRILLING

Aiming at the down-hole complicated situation during drilling, it is our goal to decrease the integrative drilling cost, improve the penetration speed, the borehole quality and safety etc. Based on the analysis of the technical advantages of reaming while drilling, the executive structure of the mechanical, hydraulic and eccentric tools of reaming while drilling and the structure mechanism of the reaming assembly are studied. Also, the related studies conducted at home are introduced. The article suggests the study on the adaptability and matching ability of existing tools should be enhanced. Some key problems should be solved for developing and improving the tools and techniques of reaming while drilling in future to tap the advantages of various tools, optimize the executive structure, the reaming assembly and the hydraulic structure, and highlight the force analysis of BHA. Practice shows the technology of reaming while drilling has great advantages on handling the down-hole complicated situation, decreasing the integrative drilling cost, improving the penetration speed, the borehole quality and safety etc. The tool of reaming while drilling is gradually becoming an important matching tool of well drilling. More attention should be paid to the technology. Corresponding study should be conducted for the tools of reaming while drilling, the key link, which is very important for raising the strength of Chinese drilling industry.