Horizontal Drilling Rigs 2015 1,100 h United States, Dunnigan, California7d
Horizontal Drilling Rigs 2011 4,486 h United States, South Vienna, Ohio
Horizontal Drilling Rigs 2015 2,992 h United States, Oakdale, Pennsylvania
Horizontal Drilling Rigs 2015 1,348 h United States, South Vienna, Ohio