It was learned from the Shandong Bureau of Geology and Mineral Resources that the third geological battalion of the bureau completed the exploration drilling of a hole with a depth of 2100.18 meters in the Zhangzhou area, once again breaking the national record of diamond rope core drilling.
It is understood that the drilling was drilled in August 2008, and the final hole was in March 2009. The domestic HXY-8 core drilling rig and S95 and S75 diamond rope core drilling technology were used. The final hole diameter was 75 mm. Multi-stage casing protection hole is adopted, and the lower part adopts technical measures such as no solid phase rinsing liquid to lubricate the retaining wall, which fully reduces the internal resistance of the hole, effectively protects the hole wall intact, and all drilling indexes meet the specification requirements.
In the 1980s, the Third Geological Brigade of the Shandong Provincial Bureau of Geology and Minerals realized the core drilling of core drilling. In recent years, in order to better adapt to the needs of resource construction strategy, the team has continuously increased investment in drilling equipment, strengthened technical personnel training, and achieved frequent success in drilling construction of “super deep, super oblique and super difficult†and repeatedly refreshed domestically. The deepest and most oblique drilling construction record.