RWD随钻扩眼下部钻具组合的强度分析  

A BHA STRENGTH ANALYSIS OF REAMING WHILE DRILLING

作　　者：石晓兵[1] 刘鹏[2] 吴应凯[3] 陈平[1] 李黔[4] 罗勇[5] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室 [2]塔里木油田公司工程技术部 [3]新疆石油管理局 [4]西南石油大学 [5]四川石油管理局

出　　处：《钻采工艺》2007年第1期7-9,143,共3页Drilling & Production Technology

基　　金：中国石油天然气集团公司新疆石油管理局"小井眼随钻扩眼技术研究"的部分内容;西南石油学院基金项目"院237";西南石油大学四川省高校"石油工程测井"重点实验室的资助。

摘　　要：RWD随钻扩眼不需先钻一个领眼,再下入扩眼器进行扩眼,使钻井和扩眼过程一次完成,并满足大部分特定井身轨迹严格控制的要求,具有工具结构简单,无活动部件,扩眼尺寸稳定规则的特点,是解决复杂深井阻卡、非常规井身结构应用和提高固井质量的有效手段,节约钻井费用。但是由于下部钻具组合的特殊性,钻具强度问题一直是倍受关注的焦点。以固体力学有限元理论为基础,考虑了钻具扭矩,建立了RWD随钻扩眼下部钻具组合强度分析的三维有限元力学模型,求解并得到了下部钻具组合的应力场。研究了RWD随钻扩眼下部钻具组合的变形和应力分布规律,并揭示下部钻具组合失效的力学机理,为钻具组合安全使用和优化设计提供了科学依据。The reaming while drilling (RWD) is one technology that the drilling and reaming operation are finished at the same time, it cuts the drilling cost. It can meet the requests of most specifically trajectories control, and it has the following characteristics: the simple tool structure, without active parts, the stable and regular reaming size, etc. The RWD is an effective means to solve sticking in complex deep wells, apply the un-conventional casing programme and improve cementing quality. In the paper, based on solid mechanics finite element theories and considering RWD tool′s torsion, a three-dimension finite element mechanical model of RWD BHA strength analysis was established, and the stress field of BHA was obtained by the model. At the same time, the deformations and stress distribution law of RWD BHA were studied, and the mechanics mechanism of BHA failure was analyzed. These researches supplied scientific basis for safety application and optimization design of BHA.

关 键 词：钻井 固井 RWD随钻扩眼钻具 有限元分析 

分 类 号：TE22[石油与天然气工程—油气井工程]