STR-138

SPT & Wireline Core Test Drill Rig

Starting at
$102,225

The STR-138 is a mini drill rig for SPT soil testing, wireline coring and rotary drilling, and is the perfect entry level SPT rig. This small yet very powerful drilling rig is designed for tight job sites while still having all the features needed for SPT testing and wireline core drilling.

The STR-138 has a 38hp tier-4 diesel engine, a water / mud pump, retractable tower, a 4-speed gearbox drill motor with wet swivel and dual wireline winches.

The STR-138 can be ordered with manual or automatic SPT hammer system.

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Specifications

Engine

  • 38 hp (28.35 kW) tier-4 compliant, turbo charged diesel engine
  • Water cooled
  • 12 V electric start
  • Emergency stop button
  • Rpm gauge
  • Oil pressure gauge

Hydraulic System

  • 22 gpm (83.3 lpm) max combined hydraulic flow
  • Max 3000 psi (206 bar)
  • Load sensing variable displacement axial piston pump
  • Feather touch controls
  • Oil cooler

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

Mast

  • Chain driven mast
  • V-Rollers
  • Tilt rotate for travel
  • Standard mast 5.5 ft (1.67 m) stroke or extended mast 10.5 ft (3.2 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
  • 19 ft (5.79 m) max height (longer travel available)
  • Dual pulley system - SPT rope pulley and wireline pulley. Tower counterbalance hydraulic locking system

Mud Pump

  • Moyno 3CL4 (or equivalent) continuous flow stator / rotor style mud pump
  • Up to 225 psi (15.5 bar)
  • 25 gpm flow (94 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) (Auto hammer option available)

Leveling Outriggers

  • 4 hydraulic level outriggers with independent controls

Drill Motor - Rotary Gearbox MS-250

  • Gear 1: 735 rpm at 275 ft lbs (372 Nm) torque
  • Gear 2: 367 rpm at 551 ft lbs (747 Nm) torque
  • Gear 3: 184 rpm at 1101 ft lbs (1492 Nm) torque
  • Gear 4: 92 rpm at 2203 ft lbs (2986 Nm) torque
  • Built-in heavy duty wet swivel (see below)

Heavy Duty Wet Swivel

  • Top intake
  • Three quick-change connectors (AWJ, AW, BW, BWL, NW, NWL, HW, HWL, PW, PWL) others available
  • Automatic spring floating system

Lifting Winch

  • 4,500 lbs (2,041 kg) lift capacity
  • Planetary gear
  • 10 ft/sec travel speed
  • Balance weight and locking hook
  • ¼”- ½” (6-12 mm) cable 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

  • 150-250 feet

Options

  • Remote control for driving operations
  • Various auger drill heads available
  • Automatic drop hammer 140 lbs (63 kg)
  • Manual drop hammer 140 lbs (63 kg)
  • Dual pipe clamp with breakout
  • Direct push drill head
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