勘探钻井 exploration drilling ; exploratory drilling ; prospect drilling ; test boring

勘探钻孔 [地质] exploratory boring ; prospecting bore ; pioneer well

海上钻探钻机 offshore drilling rig

勘探钻石 Exploring for Diamonds

冲槐探钻孔 percussion test hole

试探钻孔 trial bore hole

勘探钻机 prospecting drill ; [地质] exploratory drilling rig

测探钻 sounding borer

螺旋形触探钻 helical sounding bore

全年勘探钻井 year-round exploratory drilling