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Legacy Specialty Drill Rigs

Having started manufacturing entire water well drill rigs in the mid-90s, the DRILLMAX® lineage includes a number of legacy well drilling machines. Water well drillers continue to bring their equipment – of any brand – to DRILLMAX® for routine maintenance as well as more in-depth rig remounting and refurbishment work. 

  • DM350 Well Drilling Machine mounted on a 33,000 gvw with 4×2 or 4×4 option. The DRILLMAX® 350 is a very fast versatile well drilling machine. The well drilling machine can be set up to do small 2-inch to 4-inch water wells but also capable of drilling the 6-inch to 8-inch water wells under 500-feet deep.
  • DM400 Well Drilling Machine mounted on a single axle 4×4 truck. Its short wheelbase makes a great well drilling machine for residential water wells up to 12 inches in diameter or geothermal drilling on tough to get into job sites. 
  • DM2400 Well Drilling Machine mounted on a 66,000 gvw truck with many options for mud pump and air compressor. Rated at 1500 feet and a table opening to set 24-inch casing the drill rig can be used for water well drilling, geothermal drilling, or cathodic protection drilling. 
  • DM2500 Well Drilling Machine is the only top head drive drill truck with a 30-inch retractable table. With 60,000 lbs of pullback and a 23,000-lb winch that can be 3 parted, the DRILLMAX® 2500 well drilling machine has capabilities of drilling 2000-feet deep. A versatile well drilling machine used for large diameter domestic water wells or shallow oil and gas. 

Maximize Your Success with DRILLMAX® by Geoprobe®

Launched in 1987, Geoprobe® continuously innovates drill rigs and tooling to make your job faster, easier, and safer. Since 2017 we've applied these principles to our DRILLMAX® line of drill rigs for water well drilling, geothermal drilling, or cathodic protection drilling jobs. The newest water well drilling rigs for sale include:

Engineered Design

Engineered design and modern construction, maximizing power to quickly complete drilling while simplifying maintenance and troubleshooting

Tight Drilling

Smaller drill truck size and lighter weight, facilitating drilling in tight locations without sacrificing power

Easy Operation & Training

Simple operation, corresponding to easier training of new operators


Numerous features and options, making your drill rig customizable to your particular business model and geographic location

Service & Support

Industry-leading drill rig service support, keeping your drill rig in the field earning dollars