Rota Sludge Drilling

What is it?

A full description of rota sludge drilling can be found on the excellent akvopedia website and within the Practica drillling manual and manufacturing manual. Essentially it uses the equipment shown in the picture to lift and drop a drill bit, with a quarter turn at the bottom of each stroke, the cuttings are brought to ground level inside the drill pipe (string) whilst suspended (floating) in the drill fluid.