Reverse Circulation

Products

For Holes 5¼” to 38” (133 to 965 mm)

Leading the Industry for Reverse Circulation Systems

Numa has led the industry in the innovative design of reverse circulation hammers and reverse circulation bits for exploration, dewatering, caissons, piles/rock sockets, and foundation drilling where a large volume of rock excavation is required.

Numa is the world’s leading drilling technology provider, offering the highest value in products, performance, and service in the entire drilling industry.

Our reverse circulation products exhaust all cuttings up the center of the hammer and drill string to be safely collected at the surface. This reduces the risk of hole erosion and is better suited for environmentally sensitive applications.

The deep channel ways and side exhaust holes on our reverse circulation bits flush more air over the bit face, resulting in a greater recovery and accurate downhole sample at the surface – all at a much faster drilling rate.

Numa’s reverse circulation system is designed for use in environmentally challenging or confined work sites where contamination or risks of damaging close-by piles or other infrastructure are concerns. It uses a modified reverse circulation concept where water and/or bentonite are used for flushing the hole instead of pressurized air that can impact the surrounding area.

Numa’s RC hammers, RC bits, and other reverse circulation products are at the forefront of drilling technology, ensuring efficient and environmentally friendly operations across various drilling applications.

RC Products to meet your needs:

Benefits of Numa’s Reverse Circulation offerings include:

Five valveless hammer models.
Cuttings exhaust up a collection tube in the center of the hammer and drill string to be safely collected at the surface.
Environmentally sensitive – no foam required for hole cleaning and lubricants are not free to contaminate the formation.
Exceptional performance against high heads of water.
Hole erosion dramatically reduced.
Faster and more efficient than rotary drilling.