Know your limits: Drill rod bending capabilities and ...
2017-12-12u2002·u2002Drilling with short test strings from the surface at a 45-degree decline into dry ground conditions, without flushing, ensures maximum drag with the rods in compression. Test strings have included new and used RQ rods (good condition), Q™ rods, and competing drill rods, including those claiming heat treatments for greater midbody strength.
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