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Mining - Reverse Circulation

Mining - Reverse Circulation

Saver Subs, Cross-Over Subs
& Back Reamers


API Bit Sub

DPI manufactures a complete Range of Reverse Circulation Subs from Premium American-Made 4140 Quenched & Tempered Alloy Steel. We produce compatible threads to all major brands.

Saver Subs Positioned at the top of the RC String protect the Top Drive Threads.


Saver Sub

Cross-Over Subs are mounted directly above the Hammer, channeling the cutting from the bit face to the inner tube of the drill string.

Back Reamers Adapter - connect to the hammer or bit - used to help protect the Drill String and prolong drill bit and hammer life.