To raise the success rate of opening and closing the two-stage cementing tool, Model dsg-a cementing tool is developed.
为提高现有双级注水泥器打开和关闭的成功率，研制了DSG—A型系列双级注水泥器。
The paper gives an introduction to the structure , operating requirements and applications in olifields of Type SJG A double stage cementing implement.
介绍了SJG-A型双级注水泥器的结构特点、使用要求及现场应用情况。
The features of buried hill reservoir are described, and the use of two-stage cementing method, continuous open stage collar and cement basket is also presented.
文中介绍了潜山油藏特点及采用二级注水泥方法，采用连续打开式分级箍、水泥伞。
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