油层套管 meaning in Chinese

capital string
oil string
pay string
production string
sand string

Evaluation and perforating test for oil formation casing in model well
油层套管模拟井射孔试验与评价
Abstract : in order to enhance the ability of two types of enlarger which isused to enlarge the hole under oil layer casing , their structure , material and machining technology were improved . the result and technical index have been proved satisfactory by site application
文摘:为了提高油层套管下面扩孔用的三牙轮及同步式2种扩孔器的扩孔能力，对它们的本身结构、材料及制造工艺等做了改进，研制了功能更好的扩孔器，经现场实际使用达到了满意的效果，技术指标达到设计要求。