Rotary Drilling Rig Drilling System -Core Barrel With Roller-bit

Yuanxian High-tech Material Trading (Tianjin) Co., Ltd. is one of the leadnig manufacturers and suppliers of rotary drilling rig drilling system -core barrel with roller-bit in China. We provide advanced materials made in China with low price. Welcome to wholesale bulk CE approved rotary drilling rig drilling system -core barrel with roller-bit from our factory. Contact us for customized service and free sample.

Core barrel with Roller-bit

Main application:rock hardness above 40Mpa sandstone,rock and Granite.

Feature	Description
Roller Arrangement	Rollers are arranged in a staggered/offset pattern on the cutting ring to ensure continuous contact with the rock, reduce vibration, and optimize cutting efficiency.
Cutting Structure	Equipped with tungsten carbide (TC) inserts or polycrystalline diamond compact (PDC)-enhanced buttons for superior abrasion resistance and impact toughness.
Core Retention System	Includes an inner core catcher or spring-loaded retainer to prevent loss of core samples during hoisting.
Replaceable Rollers	Most designs feature field-replaceable roller assemblies, allowing quick maintenance and roller replacement without discarding the entire barrel, significantly reducing downtime and operating costs.
Fluid Circulation	Designed with flushing ports or slots to allow drilling fluid (water, mud, or air) to flow to the bottom, cool the bits, remove cuttings, and lubricate the cutting surface.
Connection Interface	Standard threaded or bayonet connections (e.g., API, Kelly drive, or custom adapters) compatible with various rotary drilling rigs.
Diameter Range	Commonly available from Ø 400 mm to Ø 2500 mm, depending on pile diameter requirements and rig capacity.
Barrel Length	Typically 1.0 m to 3.0 m per section, with extension options for deeper coring.

- Main Structure: High-strength alloy steels such as 42CrMo and 20MnCr5, processed through forging and heat treatment to ensure excellent strength and toughness.

- Cutting Teeth: Tooth heads are made of YG series cemented carbide (e.g., YG11C), with hardness ≥ HRA90 and impact toughness ≥ 12J/cm². Roller cones are reinforced with tungsten carbide for superior wear resistance.

- Wear Resistance Treatment: Key components are overlaid with wear-resistant alloys or nano-coatings to extend service life and reduce replacement frequency.

- Structural Components: Bucket bodies and helical blades use Q345B or high-strength wear-resistant plates, balancing rigidity and lightweight design.

JT A series flat teeth and teeth holder

BE flat teeth and teeth holder

Tricone bit

Roller Bit

Core barrel with Roller-bit – Key Advantages

1. Superior Core Quality & Recovery

Minimal Core Disturbance: The double-tube (or wireline) configuration features a stationary inner tube that remains isolated from the rotating outer barrel. This design protects the extracted core from torsional twisting, bending stresses, and vibrational disturbance-preserving the natural structural integrity of the sample.

Accurate Geological Representation: In fractured, foliated, or weathered hard rock, the roller-bit produces clean, intact core runs with clearly defined bedding planes, fracture orientations, and mineralization zones. This is essential for:

Geotechnical site investigations (dam foundations, tunnels, slopes)

Mineral exploration and resource estimation

Environmental and groundwater studies

Higher Core Recovery Percentage: The gentle crushing action, combined with efficient flushing, minimizes core washout and erosion, delivering core recovery rates consistently above 90–95% in competent hard rock.

2. Efficient Cuttings Removal & Cooling

Optimized Flushing Port Design: Strategically positioned fluid nozzles deliver high-velocity drilling media (water, mud, or air-mist) directly to the cutting face, ensuring:

Instantaneous cuttings evacuation-preventing regrinding, which is a primary cause of premature bit wear

Effective heat dissipation-reducing thermal stress on carbide inserts and roller bearings, thereby extending operational life

Cleaner Borehole: Efficient chip removal keeps the borehole clean and free from debris accumulation, reducing the risk of stuck pipe and improving hole stability-particularly in swelling or reactive formations.

Lower Fluid Consumption: The roller-bit's efficient cutting action requires less hydraulic energy for hole cleaning compared to diamond bits, reducing pumping costs and fluid consumption.

3. Lower Torque & Torsional Stress

Optimized Rolling Action: The rotating roller cones convert high axial load into a rolling/crushing force rather than dragging shear. This significantly reduces the torque required to rotate the drill string, minimizing the risk of rod twist-off or thread fatigue-common failures in deep and deviated boreholes.

Protection for Drill String Components: Reduced torsional vibration extends the service life of drill rods, swivels, and top-drive systems, lowering maintenance costs and improving overall rig safety.

Smoother Operation: The rolling action produces less stick-slip vibration compared to fixed-cutter bits, resulting in smoother, more stable drilling dynamics-a critical advantage when drilling through highly fractured or heterogeneous rock masses.

V19 flat teeth and teeth holder

H22 bullet teeth and teeth holder

JT B series flat teeth and teeth holder

Mineral Exploration & Mining
The roller-bit core barrel is the industry-preferred tool for hard-rock mineral exploration, where obtaining high-quality, undisturbed core samples is critical for resource estimation and mine planning.

 

Specific Application	Why Roller-Bit Excels
Gold & Base Metal Exploration	Penetrates quartz-veined host rocks (granite, greenstone, schist) with minimal core loss, preserving visible mineralization and alteration zones for accurate assay correlation.
Iron Ore & Hard Hematite	Handles abrasive, high-density iron formations (BIFs) with UCS often exceeding 60MPa, delivering intact runs that accurately reflect grade boundaries.
Rare Earth & Hard-Rock Lithium	Effectively cores through pegmatites and spodumene-bearing granites, where conventional bits suffer rapid wear due to high quartz and feldspar content.
Deep Exploration Drilling (>500m)	Extended bit life reduces tripping frequency, a critical advantage in deep boreholes where each round-trip can consume 4–8 hours of rig time.

Our Prestressed anchorage have CE, SGS, ISO Certificates.

Packing: As your requirements.

We support customized package:

1) All the products are packed with seaworthy packing.
2) Customer's special requirement for packing can be satisfied.
3) Air freight; sea freight and truck freight are all available.

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