STR-138

SPT & Wireline Rotary Core Test Drill Rig

The STR-138 is a mini drill rig for SPT soil tests, wireline coring and rotary drilling. Our STR-138 drill rig 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 diesel engine, a water and mud pump, retractable mast, a 4 speed drill motor gearbox 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) Yanmar tier 4 compliant, turbo charged diesel engine
  • Water cooled
  • 1.563 liter displacement (1560 cc)
  • Radiator cooling system
  • 12 V electric start
  • 3000 rpm
  • Direct injection
  • Emergency stop button
  • Rpm gauge
  • Oil pressure gauge
  • Oil level light

Hydraulic System

  • Hawe hydraulics power unit
  • 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
  • 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

Mast

  • Chain driven mast
  • V-Rollers
  • Tilt rotate for travel
  • Standard mast 5 ft (1.5 m) stroke or extended mast 10 ft (3 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 3L6 (or equivalent) continuous flow stator / rotor style mud pump
  • Up to 225 psi (15.5 bar)
  • 50 gpm flow (189 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-250

  • Gear 1: 1169 rpm at 275 ft lbs (372 Nm) torque
  • Gear 2: 584 rpm at 551 ft lbs (747 Nm) torque
  • Gear 3: 292 rpm at 1101 ft lbs (1492 Nm) torque
  • Gear 4: 146 rpm at 2203 ft lbs (2986 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

  • 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) 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

  • 150-250 feet of depth

Options

  • 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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