Other 1999 4,614 h United States, Billings, Montana24h
Horizontal Drilling Rigs 2017 4,300 h United States, Goodfield, Illinois24h
Trenchers 1992 1,827 h United States, Boulder, Colorado7d
Horizontal Drilling Rigs 2013 3,152 h United States, Boulder, Colorado7d
Horizontal Drilling Rigs 2016 5,100 h United States, Bonita Springs, Florida7d
Surface drill rigs 2020 2,955 h Netherlands, BIG 5 De Tweede Geerden 35 Velddriel24h