Mechanical Shock Response Analysis of Rilling Microchips for Optimal Performance Evaluation

Abstract

AbstractTo precisely predict the fluctuation of wellbore properties, local overheating and guide the drilling trajectory in the wellbore during drilling operations, it is preferable to use cost-effective drilling microchips to collect real-time downhole data measurements while drilling. The drilling microchips usually consist of SoC, add-on memory, sensors and on-chip battery. However, the microchips can be subjected to mechanical shocks during the release and drilling operations which can induce interconnects and components failure and eventually leads to damage, loss of stored data and a low recovery rate. As the efficient performance of the drilling microchips can be constrained due to the shock loads, hence, it is essential to understand the peak response of the device when subjected to such suddenly applied stresses or designed response spectrum. The development and validation of simulation modeling approaches is the initial step in this direction. This paper will present the effects of varied shock loads and duration on the drilling microchips using two methods: response spectrum analysis and direct time stepping through mode superposition. It can be deduced that the sum of the effective modal masses for all computed eigenmodes is around 0.8947, 0.8912 and 0.9076 in z, y and x directions. Thus, these modes account for 89.47%, 89.12% and 90.76% of the dynamic forces in the z-direction, y-direction and x-direction respectively.