id	keyword
ajst-8914	drilling
ajst-8914	nitrogen
ajst-8914	geothermal
ajst-8914	liquid
ajst-8914	bit
ajst-8914	rock
ajst-8914	temperature
ajst-8914	increase
ajst-8914	energy
ajst-8914	resistance
ajst-8914	hardness
ajst-8914	stress