Self-cleaning Core Barrel with Roller Bits

The self-cleaning core barrel mainly uses mud pumped from the drilling rig into the roller height lifter and kelly bar to the drill bit to wash the roller during drilling, and the sediment on the cutting annular surface of the roller bits at the bottom of the hole to avoid sediment accumulation in the annular groove, and to avoid low drilling efficiency and roller bits wear caused by repeated grinding of sediment by the roller bits, which greatly improves the efficiency of roller bits rock entry and reduces wear.

• The mud is directly and efficiently flushed from the drilling rig to the drill rod and the cutting ring surface of the drill bit.
• The drill bit is simple to make.
• The slag removal effect is good.
• The rock is efficient.