“地质技术”科学生产联合企业所属专门设计局研制成钻进深至100米的水压输送岩心到地表的整套技术装备。可在夹有Ⅶ级岩石薄层的Ⅱ-Ⅳ级岩层中钻进。钻进过程中冲洗液通过特制水龙头,压人双层钻杆的管间空隙并在孔底与岩心和岩粉一起进入内管8中 The specialized design bureau of “Geotechnical” Scientific Production Joint Venture has developed a complete set of technical equipment for drilling core-to-surface pressure hydraulics up to 100 meters in depth. It can be drilled in Ⅱ-Ⅳ rock layers with Ⅶ level rock layers. During the drilling process, the rinsing liquid passes through the special faucet and presses the pipe interspace between the double drilled pipes and enters the inner pipe 8 together with the core and the rock powder at the bottom of the drilled holes