SPT & Wireline Rotary Core Test Drill Rig

Our smallest gasoline SPT and wireline rotary core test drill rig. The STR-137G is a compact and very powerful rig designed to get into tight places while still having all the features needed with a SPT test rig.

The STR-137G comes with a mud and water pump for wet drilling, manual or automatic SPT hammer system, retractable mast, dual winches for wireline drilling, and a single or dual pipe clamp with breakout.

This model features a compact and incredibly powerful 4 speed gearbox drill motor with a built-in heavy duty wet swivel and a chain driven mast with V-Rollers.

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  • 37 hp (27.6 kW) Kohler tier 4 compliant, gasoline engine
  • Water cooled
  • 0.999 liter displacement (999 cc)
  • Radiator cooling system
  • 12 V electric start
  • 3600 rpm
  • Direct injection
  • Emergency stop button
  • Rpm gauge
  • Oil pressure gauge
  • Oil level light

Hydraulic System

  • Hawe hydraulics power unit
  • 18 gpm (68 lpm) max combined hydraulic flow
  • Max 3000 psi (206 bar)
  • Load sensing variable displacement axial piston pump
  • Feather touch controls
  • Oil cooler
  • In-tank oil filter

Track System

  • Stationary track system (260 mm wide 1676 mm long - 10.2” wide 66” long)
  • NACHI 2B track motor with automatic brake system
  • Built-in grease filled tensioning arm and spring


  • Chain driven mast
  • V-Rollers
  • Tilt rotate for travel
  • Standard mast 5 ft (1.5 m) stroke

Pipe Clamp

  • Single pipe/rod bottom clamp
  • Size capability from 1.5” to 6” (Other sizes available)

Telescopic SPT Tower

  • Telescopic SPT tower
  • 12 ft (3.6 m) max height (longer travel available)
  • Dual pulley system - SPT rope pulley and wireline pulley. Tower counterbalance hydraulic locking system

Mud Pump

  • Moyno 2L4 (or equivalent) continuous flow stator / rotor style mud pump
  • Up to 175 psi (12 bar)
  • 25 gpm flow (94.6 lpm)
  • Independent hydraulic motor
  • Quick coupling
  • Mounted on drill rig frame

SPT Hammer System

  • Rotary capstan system for manual SPT hammer (SPT hammer sold separately)

Leveling Outriggers

  • 4 hydraulic level outriggers with independent controls

Drill Motor - Rotary Gearbox MS-200

  • Gear 1: 1462 rpm at 220 ft lbs (298 Nm) torque
  • Gear 2: 731 rpm at 440 ft lbs (596 Nm) torque
  • Gear 3: 365 rpm at 881 ft lbs (1194 Nm) torque
  • Gear 4: 183 rpm at 1761 ft lbs (2387 Nm) torque
  • Built-in heavy duty wet swivel (see bellow)

Heavy Duty Wet Swivel

  • Top intake
  • 18,000 lbs (8,160 kg) load capacity
  • Quick change connectors (AWJ, AW, BW, BQ, NW, NQ, HW, HQ, PW, PQ) others available
  • Automatic spring floating system

Lifting Winch

  • 2,500 lbs (1,133 kg) lift capacity
  • Planetary gear
  • 10 ft/sec travel speed
  • Balance weight and locking hook
  • ¼”- ½” (6-12 mm) rope diameter

Second Winch

  • For wireline operations
  • 1,000 lbs (453 kg) lift capacity
  • 20 ft/sec travel speed

Fuel Tank

  • 10 gallon (37.8 liters) fuel tank with fuel sending sensor

Hydraulic Tank

  • 20 gallon (75 liters) hydraulic oil tank with built in site level glass

Depth Capacity

  • 100-200 feet of depth


  • Full function remote control for all drilling and driving operations
  • Built-in rod and casing rack
  • Automatic drop hammer 140 lbs (63 kg)
  • Manual drop hammer 140 lbs (63 kg)
  • Dual pipe clamp with breakout
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