DAMAGE OF OIL WELL CEMENT LOOP UNDER THE IMPACT LOAD
油水井水泥环在冲击载荷作用下的损伤分析

The impact reshaping is a technology in common use for repairing damaged casing. The mechanical model of cement loop is built based on the impact reshaping technology and wave technology. The balanced site-shape of the drill pipe and the impacting force caused by the drill pipe are obtained by subsections based on the mechanical model of a cantilever beam. According to the stress state and Mazars damage mechanical model of brittleness materials, a damage mechanical model of cement loop is built and the damage state is calculated. The calculated results are compared against testing results and the error is around 2.7%.