《Союэгеотехника》全苏生产联合体勘探技术研究所研制的-76-0型岩心在使用任何冲洗液钻进7～9级微裂隙或裂隙发育的易冲蚀和破碎岩石时,能够保证岩心采取率。当钻进微裂隙易冲蚀的岩石时,采用正循环;钻进裂隙发育的破碎岩石时采用反循环方式,此时就是微小的岩石颗粒也能被装入岩心管。为了保证在钻 “Союэгеотехника” Type-76-0 Core Developed by the All-Soviet Union’s Institute of Exploration Technology can ensure that the core taken rate can be achieved by drilling any eroded and fractured rock with grade 7-9 creep or fissure development using any flushing fluid . When drilling into the micro-fissure erosion of the rock, the use of positive circulation; broken fissures into the development of fractured rock using reverse circulation method, this time is the tiny rock particles can also be loaded into the core tube. In order to guarantee the drilling