Numa’s Super Jaws Overburden Bits are designed for dependability and longevity when simultaneously drilling and casing holes in unconsolidated ground conditions of overburden, boulders or bedrock.
The bits’ wing design allow for retraction back into the guide body when drilling is complete for extraction of all tooling while leaving the casing in place. There is no reverse rotation required, nor any expensive rings, saving drillers time and money, Numa said in a press release. Super Jaws is capable of drilling hole sizes 5½” to 42” (139-1067 mm) in diameter.
Super Jaws is available in two versions. One version utilizes a drive shoe welded to the front of the casing. As the bit advances, the casing is advanced at the same rate due to the drive shoulder on the guide body contacting the drive shoe welded to the casing. The Super Jaws ND version allows the use of thick wall casing or thick wall threaded casing. The guide body has no drive shoulder and the casing is advanced via a casing hammer, duplex diverter, or dual rotary.