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全俄勘探技术研究所研制的带有可卸伸缩式钻头的CPK—76取心钻具于1994年8月在美国盐湖城“Terra Tek”公司钻进试验台上进行了试验。试验的目的是在按正弦规律施加交变轴载(载荷变化周期为6s)条件下钻进不同
The CPK-76 coring drill developed by the All-Russia Institute of Exploration Technology with a detachable telescopic drill was tested on a drilling rig at Salt Lake City “Terra Tek” in August 1994. The purpose of the test was to apply different axial loads (with a 6-s load change period)