苏联托姆斯克工学院设计一种-1-T型新式双层岩心管并研究了其操作工艺,已基本上获得成功。双层岩心管应保证采取足够数量和质量的岩心,提高机械钻速加长回次进尺。KC－1－T型新式双层岩心管从结构上能保证采用强力钻进规范,以钻进软硬 The Tomsk Engineering Institute of the Soviet Union has basically succeeded in designing a new type -1-T double-layered core pipe and studying the operation process. Double-core pipe should ensure that a sufficient number and quality of the core to improve the ROP longer back to the sub-footage. KC-1-T-type new double-core pipe from the structure to ensure that the use of powerful drilling specifications to drill into hard and soft