Answer: strikeoil

AnswerCrossword Clue
STRIKEOILHit it big, in a way
STRIKEOILSucceed during a drill?
STRIKEOILFind a gusher
STRIKEOILDrill successfully
STRIKEOILBe successful
STRIKEOILGet lucky!
STRIKEOILFind crude stuff?