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Super Jaws Overburden Drilling Systems
Simultaneously Drill and Case Holes
Numa’s Super Jaws Overburden Bits simultaneously drill and case holes in hard rock, overburden, boulders, or bedrock. Super Jaws utilizes wings that extend out to drill a full 
diameter hole while in the drilling position. Upon completion, the wings retract back into the guide body for extraction of all tooling to the surface while leaving the casing in place.
Some of the many benefits of the Made in the USA Super Jaws underreaming bits include:
- Hole sizes 5-1/8” to 48” (130 – 1219 mm)
- Requires no drive shoe when used with dual rotary or duplex setup rigs
- Perfectly suited for micro-piles, mini-piles, tiebacks, soil nail and various applications
- Outstanding underreaming results in overburden and solid rock
- Faster penetration rates due to large bit surface area contacting formation
- Superior strength with single-piece bit body avoiding potential failure from multiple parts
- Wings extend out to drill a full diameter hole then retract to bring all tooling to the surface
- Eliminates tooling left down the hole with no reverse rotation required
Super Jaws underreamer system is available in two versions, Drive Shoulder and No Drive (ND) Shoulder, for flexible drilling capabilities.
Super Jaws® System
One version utilizes an inexpensive drive shoe that is welded to the front of the casing. As the bit advances through the formation, 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 second version is called Super Jaws ND, which stands for “No Drive” shoulder. This version utilizes thick wall casing or thick wall threaded casing. The guide body has no drive shoulder on it and the casing is advanced via a casing hammer, duplex diverter, or dual rotary. This version is especially popular in micro-piling, tie-back work, or overburden systems where the casing is recovered, or in deep overburden areas where high amounts of friction build up on the outside of the casing.
The Super Jaws® Overburden Bit can be used with different casing wall thicknesses and produces outstanding results in all formations.
Super Jaws Configuration
