113/245mm Dual-Stage Tower PDC Reaming Bit

113/245mm Dual-Stage Tower PDC Reaming Bit , integrating upper 3-wing concave cutting head with lower 4-blade drag reamer. Modular detachable architecture allows independent replacement of each stage without discarding the full assembly. Supplied with NC31 box thread, customizable to multiple API & proprietary connections. Engineered for challenging formations across geological exploration, water well drilling, coal mine tunneling, slope anchoring and bridge foundation piling. Fully customizable diameters available upon request.

Modular 113/245mm dual-stage PDC reamer bit , 3-wing concave + 4-blade drag combo, detachable stages, NC31 box thread customizable, ideal for exploration, water well, coal mining & foundation drilling.

1.Upper 3-wing concave PDC initiates penetration in hard interlayers; lower 4-blade drag continuously trues borehole wall, minimizing hole deviation and caving in interbedded strata.

2.Wear-limited stage can be swapped independently on site, eliminating full-bit replacement and cutting rig downtime.

3.Native NC31 box, machinable to IF/REG or bespoke pin-box profiles, removing extra crossover subs across mixed rig fleets.

4.Customizable outer diameter pairing, blade count, PDC cutter grade and nozzle layout, validated via drawing review prior to batch production.

Solid mineral exploration: paired with wireline coring, stabilizes hole gauge and reduces trip frequency

Deep domestic & agricultural water wells: one-pass reaming delivers smooth borehole for seamless screen installation

Coal mine roof cable bolting: impact-resistant wear package handles broken coal-gangue intervals

Highway slope stabilization anchoring: rapid short-hole enlargement compatible with compact crawler rigs

Bridge foundation pilot holes: stable penetration through plastic clay & cobble, mitigating stuck-pipe risk