2. A retrievable or drillable packer is set above the formation to be cemented.
在要被注水泥的地层的上面坐封一个可收回封隔器或可钻封隔器。
youdao
3. Drillable analysis of the rocks should be strengthened and bit type selection should be well done.
加强岩石可钻性分析，做好钻头选型工作。
youdao
4. The internal components of the landing collar are generally fabricated from plastics, cement and other drillable materials.
坐放箍的内部部件一般由塑料、水泥和其它可钻材料制成。
youdao
5. Drillable packers, and similar tools such as bridge plugs, are typically made from cast iron, aluminum, plastic or similar brittle materials.
可钻式封隔器以及桥塞等类似的工具一般都用铸铁、铝、塑料或类似的脆性材料制成。
youdao
6. This paper introduces the structure of drillable bridging plug, it's operation principle and major technical parameters, and discusses the design of major mechanism.
本文介绍了可钻桥塞的结构、工作原理和主要技术参数，并对主要机构的设计进行了讨论。
youdao
7. This paper introduces the structure of drillable bridging plug, it's operation principle and major technical parameters, and discusses the design of major mechanism.
