Spring loaded adapter for drill rods and core barrel

摘要: An adapter for connecting a core barrel to drill rods provide automatic water control diamond bit and cushioning pressure the bit. elongated hollow body has an internally threaded upper end receive rod, series of holes are spaced about axial pocket lead from discharge rod chamber. A floating piston lower coupling top barrel. Above is enlarged splined portion received in housing that longitudinal grooves receiving splines on or vice versa threadedly connected body. spiral spring over reduced its extends up into where rides against annular shims. The closed off below radial ports communicate with chamber when extended by action spring. Spaced portholes axially which retracted at time off. first-mentioned set so second all flow cut certain part positioning as reaches soft strata.