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 maintaining all the features needed with an SPT test rig.
The STR-137G includes a 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 chain driven mast with V-Rollers.