Reverse Circulation

Reverse circulation drilling is similar to air core drilling. The cuttings are returned to the surface through an inner tube and collected for later use. This type of drilling is done by either rotary drilling or percussion drilling with the aid of a down hole hammer. Reverse circulation drilling is a highly utilized drilling method for mineral exploration. RC is used to retrieve continuous samples from the ground where a solid core is not needed.

In RC drilling, air, or sometimes water, is pumped into a side inlet air swivel. The air is then blown down the outside of the pipe. Once the air hits the drill bit, it flushes and cools the air but also creates a vacuum that forces the air and cuttings up the center of the drill string and into the inner tube. The air then goes back up the drill pipe through the top drive and into a cyclone sampler. Western Drilling Tools manufactures all of its own RC equipment. The RC equipment is compatible with most others on the market.

A major advantage of reverse circulation drilling is continuous uncontaminated samples.

Western Drilling Tools also manufactures a complete line of rc tools and accessories. Feel free to contact WDT for more information on RC drilling, custom rc drilling tools and custom drilling tools.

Inner Changer

Inner Changer

Used with RC system for hammer applications and with MPD and CSR pipe. Thread Connections and Sizes Any API threads, MPD or Custom Threading Diameter sizes up to 14 3/4”

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Reverse Circulation Bits

Reverse Circulation Bits

At Western Drilling Tools we can supply drill bits for both rotary and percussion reverse circulation. The RC tricone bit is a bored out tri cone that allows continuous uncontaminated samples up the i...

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Umbrella Sub

Umbrella Sub

These RC accessory help to plug lager holes which create pressure in the annulus and a vacuum in the inner pipe. The Umbrella sub is Used with RC system in larger holes in conjunction with inner chang...

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Bit Sub

Bit Sub

Our reverse circulation(RC) bit subs can be used with any of our rc equipment. Used with RC system for rotary applications, Attach to the drill bit to maximize flow to outside forcing cutting up the p...

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RC Pipe Canada - Reverse circulation drill pipe

RC Pipe Canada - Reverse circulation drill pipe

RC pipe consists of two main components, an inner tube and an outer tube. Reverse circulation drill pipe is a dual wall pipe capable of being pressurised and not losing its pressure between joints. Th...

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For more information and product availability, Contact Western Drilling Tools at 1.888.410.0826.

Reverse Circulation Drilling | Western Drilling Tools Inc.