Horizontal Earth Drilling Limited
In Line Drilling Ltd
Northland Underground Drilling Ltd
Northland Welldrilling Ltd | Kaitaia
Brough Earthworks Ltd | New Plymouth
CDS New Zealand Ltd | Silverdale
Interdrill Limited | Stratford
Parker Drilling International of New Zealand Ltd | New Plymouth
Strata Drilling Services Ltd | New Plymouth
Nash & Ross Contractors Ltd | Dunedin
Nelson's Drill And Blast Limited | Alexandra
Simpson Well Drilling Ltd | Blenheim
Alton Drilling Ltd
Ken Garnett Drilling Limited