摘要
利用有限元法分析了钻铤上圆形槽、矩形槽、椭圆形槽及菱形槽等4种孔槽结构的应力集中规律,结果表明底边圆角、载荷方向等因素对孔槽应力集中影响较大。在此基础上,提出了具有底边圆角和拔模倾角的楔形槽钻铤孔槽结构优化方案,并已成功应用于随钻地层测试器且已申请国家专利。
The finite element method was used to analyze the rule of stress concentration for 4 sorts of drill collar groove structures, circular groove, rectangular groove, oval groove and diamond groove. The results have shown that the bottom edge rounded corners and the load direction on groove has a greater influence on the stress concen tration. Based on this, the optimized scheme of bottom edge rounded corners and draft angle of the wedge groove has been put forward for drill collar groove structure and has been applied successfully in formation tester while drilling, and also has ap plied for national patent.
出处
《中国海上油气》
CAS
CSCD
北大核心
2013年第4期38-41,共4页
China Offshore Oil and Gas
基金
国家科技重大专项"模块式地层动态测试系统(编号:2011ZX05020-003)"部分研究成果
关键词
随钻地层测试器
钻铤
孔槽结构
应力集中
有限元分析
结构优化
formation tester while drilling
drillcollar
groove structure
stress concentration
structure optimization
