Sonic Drilling

Custom-Built, TSI 150CC Sonic Drill Rigs

Sonic Drilling that Delivers Results

You know that sonic drilling has many compelling benefits. Speed – up to five times faster than conventional drill rigs, flexibility – designed to drill through a wide range of consolidated and unconsolidated soils, the rigs have additional safety features, rigs generate significantly less waste, a nearly continuous soil sample can be extracted and fed right into a sealed bag, and so much more.

What’s Unique about Sonic Drilling at Gregory Drilling? Ken Phillips, one of the most adept sonic rig managers in the business; Ken is committed to exceeding your expectations on every project.

Ken Phillips has more than 17 years of sonic drilling experience and management in a wide range of environments – across the USA, Europe, Asia, the Middle East, frequently in extreme and challenging conditions, including 70 degrees below zero, on dams, and over water. With his finesse running a sonic rig, lengthy sonic drilling experience, and strategic planning, Ken has successfully completed projects that most sonic drillers would deem impossible with a sonic rig.

Our sonic drilling team has more than 40 years of combined sonic drilling experience in the most challenging weather and drilling conditions.

Ken and his sonic drilling crews live and breathe safety and customer service.

  • Accurate results the first time – to respect your time, your project, and your budget
  • Communication and collaboration with you from project inception through completion
  • 100% transparency
  • Vigorous safety culture and excellent safety record; safety is a top priority at every site
  • Extensive preparation before your project begins, arriving prepared and on-schedule, and working to your 100% satisfaction on every project
  • Flexibility – to meet your needs and work through challenges to deliver accurate results every time

A Few of the Outstanding Capabilities of our Custom-Designed Sonic Rigs

Our powerful, compact sonic rigs are designed and engineered to do the work of much bigger rigs but in tight quarters, indoors, and difficult-to-reach locations.

  • 150 lb auto hammer
  • Angle drilling down to 20 degrees off horizontal
  • Hole sizes up to 12 inches
  • Tier 4 engine emissions
  • Low-clearance 20-foot mast
  • Low ground-pressure rubber tracks

Serving: primarily Northern California and Nevada; available for drilling projects anywhere in the Western United States.

When You Need Drilling, Make Gregory Drilling Your First Call

Contact us today and experience excellence in drilling and superior customer service.


  • FERC Approved Driller
  • Exxon Mobile LPS Instructor
  • MSHA Certified Instructor
  • PG&E Gold Shovel Instructor

Types of Drilling

  • Environmental
  • Geotechnical
  • Municipal
  • Dams and Levees
  • Mineral Exploration
  • Archeological
  • Construction
  • more