柔性钻具组合防斜钻快的强度分析  

Strength analysis of bottom hole assembly with flexible sub

作　　者：聂荣国[1] 石晓兵[2] 陈平[2] 杜青才[3] 张文波[3] 赵大鹏[4] 查永进[3] 李维轩[3] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]油气藏地质及开发工程国家重点实验室西南石油大学,四川成都610500 [3]新疆油田分公司勘探公司,新疆克拉玛依834000 [4]西南油气田分公司工程技术处,四川成都610000

出　　处：《石油矿场机械》2006年第4期26-29,共4页Oil Field Equipment

基　　金：中石油新疆油田公司"霍10井高陡构造防斜打快技术研究"的部分内容;西南石油学院基金项目"院237";西南石油学院四川省高校"石油工程测井"重点实验室的资助

摘　　要：在倾角大、岩石硬度高、自然造斜能力极强的地层中,采用常规塔式钻具组合、刚性满眼钻具组合和钟摆钻具组合均难以控制井斜,而采用柔性防斜钻具组合控制井斜则为大倾角硬地层防斜钻直提供了一种新型的技术手段。但是钻具强度问题一直是倍受关注的焦点。文章以固体力学有限元理论为基础,建立了柔性下部钻具组合在弯曲井眼或斜直井眼中的有限元力学模型,求解并得到了下部钻具组合的应力场。研究结果揭示了柔性防斜下部钻具组合的变形、应力分布规律、下部钻具组合的强度特征和失效的力学机理,为钻具组合安全使用和优化设计提供了参考依据。In the big dip, high rigidity and with high natrue building up formation , for the conventional Bottom Hole Assembly such as taper drill collar string, stiffness ＆ minimum clearance string and pendulum assembly, it is difficulty to controll deflection, But the Bottom Hole Assembly with flexible Sub is a new deflection controlling ＆ Drilling Fleetly techique way for the big dip formation. But the drilling toolI＇s strength is a focus question all the while. In this paper, finite element mechanics models for bottom hole assembly in curvature and deviated hole were established based on solid mechanics, and solved the models by commerce software, and the stress field were found. The research results show the stress distribution feature and reveal the mechanics mechanism of drill tool failure law. It provides referrence data for drilling tool saftly use and optimization design.

关 键 词：柔性钻具 防斜钻快 强度 有限元 分析 

分 类 号：TE921.202[石油与天然气工程—石油机械设备]