Safety Assessment for Down-Hole Casings in Well Completion under High Temperature and High Pressure Environment

This paper concentrates on the problem of safety assessment for down-hole casings in well completion, and we constrain the environment in high temperature and high pressure. Firstly, in order to analyze casing wear depth, we establish a suitable wear prediction model, in which friction and sliding distance coefficient between drill string and down-hole casing are utilized. Secondly, a novel safety assessment method for down-hole casings in well completion is proposed. In particular, we convert the down-hole casing safety assessment to the wear depth calculation problem. Finally, in the experiment we use a dataset which is collected from down-hole casings in well completion. Experimental demonstrate that the proposed method can effectively assess safety degree of down-hole casings in well completion.