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DRILLMAX® by Geoprobe® Geothermal Drilling Rigs by Geoprobe®

Durable Ease for Fast Production

Businesses and homeowners are increasingly honing in on the benefits geothermal energy systems offer beyond being a green, reliable energy source. Often, savings on monthly utility bills pay for financing a system. Many see a return on their investment in a geothermal retrofit. In recent years, the federal government — and even some states — implemented tax credits and incentives for the renewable energy option.

The developing demand for geothermal energy systems has generated growth in the geothermal drilling industry. Some drillers have been enticed to explore expanding into geothermal drilling. For existing geothermal drillers business is booming, while others weather fluctuations by diversifying their service lines with a single drilling rig.

Mud or Air Rotary

Engineered to handle the speed of geothermal drilling - drilling multiple borings per day as compared to a single hole during a multiple-day process -  the DRILLMAX® geothermal drilling rigs by Geoprobe® exceed expectations in tough conditions. While geothermal drilling tends to prioritize overall rig size and weight, drilling speed, and cost per foot, options such as sandline winch or pipe spinner systems can be added to minimize equipment on your geothermal drilling job site.

Drill Rigs for Sale

  • DM250: drill rigs for sale suited for residential geothermal drilling or small commercial jobs.
  • DM450: drill rigs for sale designed for large residential geothermal drilling or commercial jobs.
  • DM650: drill rigs with options to be outfitted as down the hole drill or mud drill for large residential or commercial geothermal drilling jobs.

DM250 Geothermal Drilling Game Changer

Developing demand for geothermal energy systems has generated growth in the drilling industry and a need for equipment sized to fit onto today’s urban geothermal drilling sites combined with the power to complete commercial job requirements

“Jobs don’t adapt to the equipment in the industry, the equipment has to adapt to the jobs,” said Kyler Erickson, drilling manager with Associated Drilling in Kansas. “We needed a rig sized to drill those residential geothermal systems.”

They found the DRILLMAX® DM250 by Geoprobe®slips into tight geothermal drilling job sites while maintaining production pace of larger rigs. 

“We have the DM250 running five days a week from one geothermal job to the next,” Erickson said. “I thought it would be slower than bigger rigs, but we haven’t seen much change at all.”

Engineered to utilize 20-foot tooling without requiring a class A/B CDL, the DM250’s size helps expand available driller talent pool. Its smaller footprint also provides contractors a selling point, comforting clients concerns when describing something just bigger than a dually truck will complete work, leaving less mess and fewer ruts. 

“We’ve been getting more phone calls from different contractors and even the ones we’ve worked with for 20 years ask for the DM250,” Erickson said. 

The compact, comfortable chassis also equates to fuel efficiency and satisfied crews traveling site-to-site at highway speeds enjoying air conditioning and Bluetooth stereo.

“It gets into jobs much easier, is quicker to set up, and drills fast,” Erickson said. “The DM250 can definitely compete with the larger rigs in the geothermal and shallow water well market.”

Typically they would use their bigger rigs on commercial geothermal jobs due to the required hole depth, but he recently put the DM250 on a commercial site drilling 75 percent of the 96 holes to 400 feet.

“It did great,” Erickson said. “The speed of drilling 400-foot holes and tripping pipe meant it was taking maybe two hours per hole.”

Read how one company took their business to the next level and succeeded on one geothermal drilling job where COVID-19 restrictions limited them to just the two owners on site thanks to the features on the DM250, including:

  • pressure consistency produced by the piston pump
  • physical comfort created by the wide driller’s platform
  • production capability provided by the rod loader 

Geothermal Drilling at ‘Geo-Pace’ with DM450

The speed and ability of the single rod loader to keep adding pipe make the DM450 well suited for geothermal drilling jobs.

“On average, the DM450 is 1.5 times faster than our other rig,” Skyler Wilson, Pan Terra Energy operations manager, said. “Just the top head movement on the other rig takes twice as much time as swinging the rod handler. Once you’re out of rod in the other rig carousel, adding pipe takes 10 times as long.”

The driller was impressed the DM450 kept up with the “geo-pace of drilling four to five holes a day.” He boasts the DM450 accomplished more than the combined footage of three other rigs on a geothermal drilling job in the Rockies.

Having a central U.S. service center nearby provides peace of mind. For Owner Mike Ryan, having engineers receptive to driller feedback for product improvement distinguishes Geoprobe®from other manufacturers.

“It’s not always the case that engineers have an open mind to suggestions from drillers,” he said. “DRILLMAX® [by Geoprobe®]engineers seem to really be interested in feedback from the field. When it comes down to it, it’s about people. The DRILLMAX® [by Geoprobe®]commitment to make things right is important.”

Read how they compare the features of their legacy and 2020 DM450, including:

  • rollers on carriage
  • sleekly laid out hydraulic lines
  • power and precision from manual hydraulic controls
  • rigid drill mast for straighter holes

DM650 Drill Rigs for Sale for Geothermal Well Drilling

Drillers seeking rotary drilling options - outfitted for air drilling or mud drilling - with power to pull and push in tough geologies choose the DRILLMAX® DM650 by Geoprobe®for geothermal well drilling with 28.5-foot stroke, 40,000 lb pullback, and 8,000 ft-lb torque. 

“I don’t want to lose out on business, so the DM650 capabilities caught my eye and its similar operation to my current rig means I wouldn’t have a huge learning curve,” Robbie Barnard of J&J Water Well & Windmill Services in Texas said.

Possessing power to quickly reach depth, the DRILLMAX® DM650 by Geoprobe®is engineered to handle up-to 24-inch holes. Top head and drill mast features contribute to its ability to quietly and smoothly drill deeper, bigger holes.

“It’s much faster, heavier, and has more pull down. I could do jobs a lot faster,” Mark Kelly of Emerald Coast in Alabama said.

Drawn to the DM650 for its attention to detail with a simple control center and clean routing of hydraulic hoses, other features catching drillers' eyes include:

  • ample power, both on and off the road
  • increased speed and efficiency running multiple functions without losing hydraulic power 
  • speed and labor savings of the rod carousel


When handling tough site conditions with one machine, consider Geoprobe® sonic for a quick and efficient geothermal drilling rig. The track-mounted geothermal drilling rig easily maneuvers on site and preserves the option for continuous sampling to characterize the subsurface, improving geothermal well design and construction. Minimize your geothermal development time and site clean-up costs by casing holes quickly without drilling mud using sonic.

With drill rig service shops in North Carolina, Pennsylvania, Florida, and Kansas, you’ll have service support nearby for your routine maintenance or more in-depth drill rig remounting and refurbishment work. Our service technicians are backed by our team of engineers to ensure solutions not bandaids to issues. And our production processes mean your surface drill rigs are constructed consistently and tested thoroughly to ensure easier service support.

Don't see a feature you're looking for on your geothermal drilling rig?  Give us a call.

Our team of engineers thrives on collaborating with drillers while they continually innovate new designs for our geothermal drilling rig line. Our goal is to help maximize your success by making your job faster, safer, and easier. Partner with us and we'll work to decrease your geothermal drilling rig downtime while increasing your family time.

Contact Us

1835 Wall Street
Salina, Kansas 67401
Phone: (785) 825-1842

“The DRILLMAX® took a beating but got right through it. We doubled our production speed with the stroke and pump. The way she forces plastic clay out of the hole was pretty unbelievable. The 20-foot stroke and speed of the tophead means it goes faster for a longer distance, good for plunging clay out of the hole.”

Joe Dalba, Partner, Island Geo Drillers, New York

Water Well

DM250 completes geothermal field installations

DM250 Water Well Drill Rig

Stroke and head feed resulted in completing 15 bores to 305 feet through tough, plastic clay 80 percent of the hole while simple operation meant one person ran DM250 drill rig while the other worked the mud cleaner prepping loops for installation.

DM450 stands up to test of geothermal drilling in tough Colorado conditions

DM450 Water Well Drill Rig

DM450 stands up up to the 'geo-pace' of multiple borings per day in the Colorado mountains installing geothermal loops, reportedly outproducing the combined footage of three other rigs on the geothermal job.

Drill rig can be outfitted as down the hole drill or mud rotary drilling rig

DM650 Water Well Drill Rig

Outfitted for air drilling or as a mud drill, the DM650 tackles deeper wells required for large residential, light commercial, or farm irrigation.


8250LS 20-foot tooling expedites geothermal field sonic boring

8250LS Sonic Drill Rig

With the power to advance 20-foot tooling, 8250LS quickly completes multiple sonic borings while rod handler reduces strain on drillers when completing geothermal fields.

8150LS geothermal drilling

8150LS Sonic Drill Rig

Complete borings quickly without drilling mud minimizing field development time and site clean up costs.

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Depend on Team Geoprobe®

Since 1987, Geoprobe® has manufactured innovative drilling rigs and tooling - engineered for efficiency and safety - simplifying drillers’ jobs and empowering their companies to succeed as productive and profitable leaders in the industry. When you partner with Geoprobe® you receive:

Customer-inspired Innovation

Engineering and building industry-leading drilling rigs, tooling, and techniques for the technical driller based on your needs to work safer and more efficiently.

Exceptional Value

Ensuring drilling rigs and tooling are created in conjunction – with consistent quality – to collect the highest-quality information with the most accurate result to get you to, into, and through the job efficiently.

Superior Service

Equipping you to do your best job and keeping you in the field via one-on-one expert sales and service technicians manning live support phone lines, shipping necessary parts same-day.