Drill Collars
Matrix Drill Collars are engineered to deliver precise weight on bit (WOB), maximizing penetration rates and eliminating compression drilling — two of the most common causes of drill string failure and increased cost per foot.
Machined from high-grade AISI 4145 alloy steel, every Matrix Drill Collar undergoes rigorous quality control during manufacture. Each collar features a DI-22 thread form and a stress relief groove in the pin tool joint connection, reducing fatigue failures and extending drill string life.
The result: fewer failures, less downtime, and lower cost per foot for drilling contractors.
Inner Tube Testers
Similar to a thread protector with a hole in it, Matrix Inner Tube Testers screw into the pin end of the RC Drill Rod. Then, by running compressed air into the opposite end of the rod a leak will be revealed if there is air exiting out of the hole in the tester lid. If a leak is discovered replacement of O-rings often fixes the problem. If the leak persists, it can be concluded that the inner tube has been ruptured and it will have to be replaced or scrapped.
Shrouded Rock Bits
Matrix offers a full range of shrouded Tricone bits providing top end protection to the Tricone bit body while maintaining a constant annulus. Our shrouds are designed to release the compressed air into the borehole close to the face of the bit for the most efficient clearing of cuttings.
Transition Rods
The Transition Rod effectively absorbs drill string torsional and lateral stresses associated with deep hole RC drilling. The redistribution of stresses will increase drill string life and minimize failures making the Transition Rod a prudent addition to your drill string. The Transition Rod is positioned strategically between the Drill Collars and the Dual Tube Drill Rod. Matrix Transition rods are machined from high grade alloy steel. Adaptable to any combination of drill collar and RC drill rod sizing.
Side Entry Swivels
Placed below the top head, this product directs compressed air into the annular area of the Matrix dual tube rods while allowing a continuous discharge of cuttings through the top head of the rig.
Side Discharge Swivels
A Matrix specialty product. Allows drillers with smaller rigs to be able to drill with larger sized Matrix dual tube rods by discharging the cuttings below the top head. Features replaceable chrome wear rings for easy maintenance.
Reverse Circulation Pre-Collar Casing
Matrix manufacturers Pre-collar Casing for reverse circulation applications. This casing must be stout with a durable thread profile to work with the larger RC rigs. We offer a choice of field proven thread profiles as well as both one-piece threaded casing and casing with composite alloy tool joints for extended wear life. We manufacture a full range of sizes and a selection of mid body steel, grade, and dimension.
Matrix Reverse Circulation Dual Tube Drill Rod – Surface
Matrix Drilling Products is a recognized industry leader in reverse circulation (RC) drilling tools, delivering solutions engineered for superior performance, reliability, and durability in demanding drilling environments. Matrix manufactures a complete crown-to-ground RC drilling system, providing drill rods and purpose-built accessories designed to work together as a fully integrated solution for reverse circulation drilling applications.
At the core of this system is Matrix’s signature dual tube drill rod, built to deliver efficient sample recovery and consistent performance in RC drilling operations. Matrix dual tube drill rods are available in a wide range of sizes, making them adaptable to nearly any drilling rig or drilling program. Standard rod sizes include M3.25″, M4″, M4.5″ and 5.5″ OD, with additional configurations available to meet specific project requirements.
Engineered for strength and precision, Matrix dual tube drill rods provide the durability and reliability required for water well, geothermal, mining, and exploration drilling applications.
Non-Magnetic Dual Tube
Matrix offers a non-magnetic RC dual tube product line machined from 304L stainless steel which is corrosion resistant against all types of mud. This product is typically used with sensitive surveying equipment.
Field-Replaceable Inner Tube (F.R.I.T.) RC Drill Rod
These dual tube products feature a removable inner tube, allowing customers to replace them on the job site without the need for machining or welding. This product line is very popular with our international customers.
Matrix Reverse Circulation Dual Tube Drill Rod – Underground
Matrix manufactures its 3.25 inch OD RC Drill Rod specifically for underground mining exploration applications. The M3.25 rod has distinguished itself, like its big brothers, as a very tough and durable product. Recently, Matrix has optimized the design of our M3.25 drill rod assembly for maximum airflow with the use of CFD (Computational Fluid Dynamics) modeling, thus increasing both productivity and depth capacity of this product.
Subs and Accessories
Clamshell
This rod handling tool is very popular in angular hole applications. The Matrix Clamshell locks around the drill rod tool joints and assists in the angular positioning of the RC rod. Whether you are adding or removing rod from the drill string, it saves time and makes the task easier.
Saver Subs
Matrix RC Saver Subs are manufactured from heat treated alloy steel and have exceptional strength and durability. The Saver Sub has an inner tube and an outer body. It is used to connect the swivel or Top Head Adaptor to the first RC drill rod. The saver sub becomes the main makeup and breakout connection, protecting the threads on the swivel or top head.
Back Reamers (Digout Subs)
The Matrix Back Reamer (Digout Sub) has multiple functions. First, it helps prevent premature wear to the RC DTH Hammer. The second function of the back reamer is to in fact “back ream” the borehole. This is necessary in the event the borehole wall is unstable and experiencing partial collapse and assists the driller in removing the drill string from a tight borehole. The Back Reamer is positioned between the RC DTH hammer and the first RC Drill Rod. The back reamer consists of an outer body and an inner lift tube. When the inner lift tube of the Back Reamer shows signs of deterioration it can be easily replaced.
Blow Down Subs
The Matrix Blow-Down Sub is designed to clear blockages in the slots of the interchange, rock bit adaptor, and dual tube drill rod inner tube. Installed at the top of the Reverse Circulation (RC) drill string, it seals the annulus of the dual tube rod and directs airflow through the RC inner tube to restore proper circulation.
The Blow-Down Sub consists of two precision-engineered components: an inner tube and a durable outer body.
Blow Up Subs
The Blow-up Sub is positioned at the top of the drill string disconnected from the top drive. It is used to direct the airflow up the inner tube (through the head to the sample collection tube) to clear a blockage. Available for all sizes of Matrix Reverse Circulation (RC) tools.
Air Injector Subs
The Matrix Air Injector is used in dual tube flooded reverse applications to aerate the water column inside the inner tube initiating upward flow. The air injector is the main, high-flow site of aeration found near the bottom of the string.
Interchanges (Crossover Subs)
The Matrix RC Interchange is a three-piece assembly made up of an interchange body, inner tube, and top sub. It is designed for use with an RC DTH hammer or tricone rock bit in reverse circulation drilling.
The interchange directs drill cuttings from the bit into the inner tube of the RC drill rod. From there, samples travel up the drill string and discharge at the surface for collection.
Jetted-style RC interchanges introduce a controlled amount of compressed air into the return sample stream. This added airflow helps move cuttings up the inner tube and improves sample recovery.
The interchange is installed directly above the DTH hammer in the RC drill string. Matrix RC interchanges are built for strength and durability in demanding drilling conditions. They are available in 1-, 2-, or 3-slot designs, with or without jetting, and are manufactured to match each Matrix RC tooling size.
Lowering, Hoisting, & Handling
Matrix manufacturers hoisting plugs equipped with heavy duty bails to allow you to safely hoist and lower your RC drill string.
Stabilizers
Stabilizers are used to assist in providing smooth, supported rotation of the drill string. Many times a formation may be subject to significant erosion, causing the borehole wall to be unstable. Stabilizers help to support the lower end of the drill string. In addition to providing supported drill string rotation, stabilizers enhance production as they keep the drill string aligned with the drill bit. Matrix offers milled spiral stabilizers are available up to 48″ long and to 20″ OD. Straight blade stabilizers are available up to 72″ long and 20″ OD.
Rock Bit Adaptors
The Rock Bit Adaptor (RBA) is employed in RC drilling with a Tricone Rock Bit. The RBA connects directly to the Tricone Rock Bit and its purpose is to direct the cuttings into the inner tube of the RC drill string.
The Rock Bit Adaptor is an assembly made up of 4 components:
- RBA Outer Body
- RBA Inner Tube
- Wear Sleeve
- Bladder
Matrix offers size specific RBA connection options to the tricone bit.
Aerator Subs
The Aerator Sub, in conjunction with the air injector sub, is utilized in dual tube flooded reverse applications. This product assists in initiating lift of the water column in the inner tube to begin circulation in deep hole drilling applications. The Aerator Sub inner tube features two small angled passages that allow a calculated amount of compressed air to be released to the inner tube before reaching the bottom hole assembly.
