随钻声波测井环槽隔声体的强度分析

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 of sound insulation body that is commonly used in the acoustic logging while drilling.The numerical simulation method has been used to study the maximum equivalent stress area of the sound insulation body, and understanding the influence of the torque, the radius of the transition arc, the groove depth, groove spacing and groove width on the mechanical strength of 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 of mechanical strength appears in the inner transition arc.The maximum equivalent stress of 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 of the sound insulation body appears in the inner transition arc, and the stress decreases with the increase of the radius of the inner transition arc.The study results could provide certain references for the design of sound insulation body in ring groove.