Kola Superdeep Borehole Drill Bit
Dec. 19, 2024
Kola Superdeep Borehole - Wikipedia Brian Roemmele on Twitter: "This is the cap of the Kola Superdeep Borehole. They reached 40,111 feet of depth in 1989, after nearly two decades of drilling. One of the deepest drill Drilling into Hell . . . almost there | The Mountain Mystery Kola Superdeep Borehole Drill Bit