Oilring slots, or holes, must be clean; a drill of the proper size is handy for this job.
油环开缝或孔隙必须清理干净，用适当尺寸的钻机进行这项工作较为便利。
2
Based on the bedding grid and horizontal grid, mixed grid-modeling method was established by analyzing oilring distribution and the existing reservoir simulation grid technique.
分析了薄油环分布特征及现有油藏模拟网格技术特点，引入顺层网格和水平网格，论述了混合网格建模方法。
3
The results also find that wear resistance of niobium cast iron oilring is 87.3% higher than that of CrMoCu alloy cast iron along with the cost reduction for niobium cast iron oilring.