Wireline Core Rod

A wireline core rod is a key parts of diamond core drilling process. It used to retrieve core samples quickly and efficiently while minimizing the need to pull the entire drill string out of the hole.

In deep-hole diamond core drilling, the drill string is subjected to extreme tensile pull, massive torsional friction, and destructive rotational vibration. A single rod failure can lead to catastrophic hole loss and tens of thousands of dollars in downtime.

Gdrills Premium Wireline Drill Rods (including NRQ, HRQ, PRQ, and standard Q series) are engineered to withstand these extreme downhole environments. By combining aerospace-grade raw materials, advanced heat treatment, and precision-machined threads, we deliver drill rods that keep your project rotating safely, hole after hole.

Q Series Wireline Drill Rods

W Series Wireline Drill Rods

WJ Series Wireline Drill Rods(Taper thread)

WY Series Wireline Drill Rods(Taper thread)

We do not compromise on steel quality. Our drill rods are manufactured to meet and exceed global oilfield and mining standards:

Premium Alloy Steel: We source only premium-grade 30CrMnSiA / 45Mn2 / 4130 seamless steel tubes, ensuring uniform wall thickness and concentricity.

API 5DP Standard Compliance: Our manufacturing processes, dimensional tolerances, and quality control protocols strictly align with the API 5DP international standard for drill pipes, ensuring unmatched structural integrity.

Strict Straightness Control (API Certified): Rotational vibration in deep holes leads to premature rod wear and core barrel damage. G-Drills controls rod straightness to better than 1:2000 (0.5mm per meter), which is superior to standard industry requirements. This guarantees ultra-smooth rotation and zero harmonic resonance at high RPMs.

To maximize the mechanical properties of the steel, G-Drills utilizes a state-of-the-art multi-stage heat treatment process:

Full-Length Q&T (Quenched & Tempered): The entire tube body undergoes a fully controlled quenching and tempering process. This refines the steel's grain structure, providing the perfect balance of high tensile strength (for deep-hole pulling) and high fatigue limit (to survive bending stresses in deviated holes).

Controlled Heat Treatment Parameters:

Tensile Strength: 930MPa

Yield Strength:820MPa

Elongation:>=15%

Thread damage (galling or thread-locking) is the leading cause of premature drill rod retirement. G-Drills prevents this through premium machining and chemical surface engineering:

CNC Thread Cutting: All threads (such as NRQ, HRQ, PRQ, and Q-series) are machined on high-precision CNC lathes and checked with standard DCDMA master gauges.

Premium Phosphating Treatment: After machining, the male (pin) and female (box) thread connections undergo a specialized chemical zinc/manganese phosphating process.

The Phosphating Advantage: This process creates a porous, oil-absorbent crystalline layer on the thread surface. It acts as a dry lubricant carrier, retaining thread grease and dramatically reducing direct metal-to-metal friction. This completely eliminates thread galling during initial make-up cycles and extends thread service life by over 150%.

API & ISO Standardized Facility: Our factories utilize advanced automated heat-treatment lines and computerized CNC threading stations, ensuring every single rod meets the exact same mechanical tolerances.

Reduced Total Drilling Cost (TDC): With our anti-galling phosphated threads and high straightness control, you will experience fewer downhole rod failures and less rig vibration, resulting in a lower cost-per-meter.

Seaworthy Bundle Packaging: Rods are packed in secure hexagonal steel frames, wrapped in heavy-duty waterproof PVC sheets, and fitted with robust thread protectors to prevent any transportation damage or corrosion during long-term storage at the drill site.

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