NQ vs HQ Wireline Drill Rod: Which Size for Deep Core Drilling?

Wireline Core Drill Rods: BQ, NQ, HQ, PQ & Thin Wall BTW/NTW/HTW — Sizes, Steel Grades & Buying Tips

Why wireline core drilling is booming

Gold exploration budgets reached $6.2 billion in 2025 — up 19% and roughly half of the global $12.4 billion exploration spend. Wireline coring is the fastest-growing drilling segment at a 7.7% CAGR (2025 –2029). Deeper holes, tighter schedules and costly downtime make the wireline drill rod the component buyers cannot afford to get wrong.

What is a wireline drill rod?

The hollow, threaded alloy steel pipe that powers wireline core drilling. Rotation and thrust pass through the rod string to the diamond bit, while the core sample collects in an inner tube retrieved by an overshot on a wireline cable — no full tripping of the string. At depths over 500 m, wireline coring runs 3 –5× faster than conventional coring .

Mensuras de varillas de perforación por cable: norma DCDMA

Todas las mensuras estándar siguen la norma DCDMA, así que varillas, barriles de testigo, tubos de revestimiento y brocas son intercambiables en todo el mundo:

NQ est norma industriae pro exploratione mineralium; HQ praebet circa 33% maius cor pro examinibus exactis et mechanicis petrarum; PQ aptus est ad investigationes geotechnicas magni diametri; bacilli parietis tenuis BTW/NTW/HTW permittunt maius cor trans eundem foramen pro programmatibus foraminum angustorum et machinarum forandi portabilium. Series extensae disponibiles: ATW, NTW2, HTWA, HWTH, PHD, NRQ, HRQ, PRQ, CR50/CR60 et normae ASAHI.

Gradus ferri et filettae quae diuturnae sunt

ZT950 (elasticitas 950 MPa) et 30CrMnSiA ( ≥835 MPa) ferro-alloy alti fortitudinis resistunt flexioni bacillorum et fessurae in foraminibus profundis.

Filetta Q (conica; variantes RQ/XQ) praebet coniunctionem celerem, torque elevatum et resistentiam ad adhaesionem; extremitates forgiatae et temperatae et rectitudo alta (~0.4 mm/m) prolongant vitam usus.

Cur bacilli forandi deficiunt — et quomodo hoc praeveneri possit

Galling — adhaesio filettarum ferri ad ferrum sub torque; semper utere unguento filettarum et sequere specificata torque.

Flexio bacilli — gravitas deviat corde prope 1 000 m; ferrum alti reditus resistit flexioni.

Rectitudo — baculi extra toleratiam vibrare et frangere possunt; mensura ad deliversionem.

Laboriem — tractatio caloris inaequalis causat fissuras; pete documenta de tractatione caloris.

Index Emptionis

Plena gamma DCDMA in stock: a BQ usque ad PQ, parietes tenuis BTW/NTW/HTW plus series extensae

Certificationes: ISO, MSDS, RoHS — documenta cum omni ordine mittuntur

Minima quantitas ordinabilis (MOQ): unum exemplar ad probandum ante magnam quantitatem

Longitudines normales: 1,5 m / 3 m; longitudines, filetta, et confectiones ad mensuram OEM/ODM

Pretia directe e fabrica, salutantur venditiones ingentes

Applicationes: exploratio aurifera, cuprifera, et litii, perforatio puteorum aquarum, exploratio carbonis, investigatio geotechnica, perforatio profunda.

FAQ

Q1. NQ vs HQ — which size? NQ (core 47.6 mm) is the most widely used standard and fastest; HQ (core 63.5 mm) gives a ~33% larger core for better assay confidence at lower speed.

Q2. What is "thin wall" (BTW/NTW/HTW)? Thin kerf rods recover a larger core through the same hole — NTW gains ~28% over NQ — ideal for slim hole and portable rigs.

Q3. Can I order a sample before bulk? Yes — 1-piece MOQ sample orders are standard for testing fit, threads and performance.

Contact us for a spec sheet and sample order — full-range wireline drill rod supplier, factory direct, OEM/ODM supported.