Word: drills
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...Dartmouth study recommends a much broader foundation for ROTC training, primarily revolving around a decrease in the technical, drill-type courses and an increase in the socio-military courses, i.e., Government 180 and the like. The study wants the "nuts and bolts" left to summer camps and cruises...
Imaginative people have mulled the idea for years. Novelist Arthur Conan Doyle, who visualized the earth's shell as a living creature, made his fictional Professor Challenger poke a sharp drill eight miles down, called his story When the World Screamed. AMSOC's goal is to pierce the Mohorovicic discontinuity, which scientists call the Moho for short...
...drilling cannot be done on the continents because they are great rafts of granite "floating" in deeper plastic material. The granite is too thick (20 miles) to drill through. Oceanic islands are also ruled out as drilling sites; their weight has pressed the Moho to an impossible depth. The best place to drill is the floor of the great ocean basins. The floor may be three miles beneath the ocean's surface, but the Moho lies only three or four miles deeper, under a thin skin of sedimentary deposits and a layer of basalt...
...would have been unthinkable a few years ago. But the new search for offshore oil has developed machinery capable of doing it. The rig that appeals to AMSOC is the Cuss I (named for Continental, Union, Shell and Superior companies), a 3,000-ton barge with a 98-ft. drilling derrick mounted amidships. The drill is carried on gimbals, so that heavy seas will not snap the drill pipe...
First step toward the Moho would be to drill a cone-shaped hole in the sea bottom. The hole would be filled with cement poured down the drill stem and a steel platform fixed in the cement. The rock drill would be passed through this steel collar and turned from the barge. The long drill stem would be flexible enough to allow for the ship's motions...