Engineered for geological exploration, geotechnical drilling, and mineral coring, our Diamond Core Drilling Circle Wrenches provide full 360-degree grip coverage to tighten and break connections on wireline drill rods, outer tubes, and inner tubes. Designed specifically to prevent tube crush, surface scoring, and ovalization, these wrenches ensure maximum torque transfer without damaging expensive thin-walled core barrels.
Manufactured from high-tensile forged alloy steel with heat-treated contact jaws, our circle wrenches fit standard DCDMA wireline sizes including AQ, BQ, NQ, HQ, PQ, as well as customized casing dimensions. Available in both outer tube and inner tube wrench configurations.
EU Customs Tariff Advantage: Bestec benefits from an approved individual lower anti-dumping duty rate in the EU, allowing European drilling suppliers and mining contractors to legally reduce import tariff burdens.
Outer Tube Circle Wrench | Inner Tube Circle Wrench | Rod Wrench
Material Composition
Drop-Forged High-Strength Alloy Steel (42CrMo)
Heat Treatment
Induction Hardened Contact Surfaces (≥55HRC)
Grip Design
360° Full-Circle Non-Crushing Uniform Clamping
Handle Structure
Extended Lever Handle with Slip-Resistant Industrial Grip
Custom Options
Custom diameters for non-standard geotechnical casing tubes
Key Drilling & Field Features
Anti-Crush 360° Full Contact Area: Evenly distributes gripping force around the entire tube circumference, preventing thinning or warping of delicate wireline core barrels.
Replaceable High-Grip Jaw Inserts: Precision heat-treated alloy jaws deliver high friction on slippery or muddy drill rods without biting deep scars into the metal.
DCDMA Wireline Compatibility: Engineered to exact tolerances for seamless fitment on world-standard AQ, BQ, NQ, HQ, and PQ core drilling rods and casing barrels.
Drop-Forged Heavy-Duty Handles: Built with high-strength alloy steel handles designed to withstand extreme manual break-out torque during deep-hole operations.
Primary Mining & Drilling Applications
Wireline Diamond Core Drilling: Tightening and disconnecting wireline core barrel inner and outer assemblies on rig sites.
Mineral Exploration Drilling: Handling thin-walled NQ/HQ/PQ drill rods without galling or damaging thread joints.
Geotechnical Site Investigation: Soil sampling and bedrock coring tube assembly in civil engineering projects.
Underground Mining Exploration: Field maintenance and pipe handling in tight underground drill stations.
