摘要
凹槽隔声体是随钻声波测井中普遍采用的一种隔声体,通过数值模拟方法研究了凹槽隔声体最大等效应力出现的区域,以及扭矩、过渡圆弧半径、凹槽深度、槽间距和槽宽度对隔声体机械强度的影响。分析结果表明:扭矩对隔声体的机械强度有较大的影响,在实际计算过程中不能忽略;无论加载扭矩与否,隔声体机械强度最弱的区域出现在内过渡圆弧半径处;隔声体上的最大等效应力与凹槽深度呈线性关系,在满足隔声量与时延量的情况下可以适当减小凹槽深度;隔声体的最大等效应力出现在内过渡圆弧半径处,随着过渡圆弧半径的增大应力逐渐减小。所得结论对环槽隔声体的设计具有一定的参考作用。
The sound insulation body in ring groove is a kind ol sound insulation body that is commonly used in the acoustic logging while drilling. The numerical simulation method has been used to study the maximum equiva-lent stress area ol the sound insulation body, and understanding the influence ol the torque, the radius ol the transi-tion arc, the groove depth, groove spacing and groove width on the mechanical strength ol the sound insulation body. The results show that the torque has a great influence on the mechanical strength of the sound insulation body and cannot be neglected in the calculation process. With or without loading torque, the weakest area ol mechanical strength appears in the inner transition arc. The maximum equivalent stress ol the sound insulation body is linearly related to the groove depth. The groove depth can be reduced appropriately on the promise that the sound insulation and the time delay amount are met. The maximum equivalent stress ol the sound insulation body appears in the in-ner transition arc, and the stress decreases with the increase ol the radius ol the inner transition arc. The study re-sults could provide certain relerences lor the design ol sound insulation body in ring groove.
出处
《石油机械》
2017年第7期26-29,共4页
China Petroleum Machinery
基金
国家科技重大专项"复杂储层测井新方法与探测器研究"(20011ZX05020-009)
关键词
隔声体
测井
凹槽深度
随钻超声波
等效应力
sound insulation body
logging
groove depth
ultrasonic logging while drilling
equivalent stress
