English

Alternative forms

• drilling rig

Noun

drill rig ‎(plural drill rigs)

1. Used other than as an idiom: see drill,‎ rig.
   • (Can we date this quote?), Iqtidar H. Siddiquiyear=1979, Irrigation canals: planning, design, construction, and maintenance:

     In sandy strata, 7 to 9 inches diameter holes are drilled with a percussion type drill rig.

   • 2001, William A. Hustrulid, Richard L. Bullock, Underground Mining Methods, page 224:
2. An oil rig.