280mm 5‑Blade Concave Reinforced PDC Bit

Our 280mm five‑blade concave reinforced PDC bit is engineered for heavy‑duty water well and mining drilling projects, built to withstand tough interbedded formations and high‑impact downhole operating conditions. Equipped with standard 6 5/8‑inch REG thread connection, this PDC rock bit comes in multiple off‑the‑shelf sizes: 8 inch, 8.5 inch, 9 inch, 9.5 inch, 10 inch, 10.5 inch and 11 inch. Beyond standard catalog dimensions, we support fully customized bit diameters and alternative thread connections according to your project drawings and field requirements.

The inner‑concave blade structure improves centering performance at the start‑up drilling stage, reduces bit wandering, and delivers stable borehole quality. Reinforced blade base adopts high‑strength alloy for anti‑breakage and anti‑abrasion performance, effectively resisting shock load when drilling mixed hard‑soft interbedded rock layers. Optimized fluid passage design guarantees smooth cuttings evacuation, lowers bit balling risks, and extends overall bit service life.

Suitable Formations

Ideal for soft‑to‑medium hard formations: clay, sandstone, mudstone, shale, limestone, and mixed interbedded strata. It performs reliably for formations with small hard inclusions; not recommended for extremely abrasive pure quartz hard rock without proper parameter adjustment.

Application Working Conditions

Mainly deployed for water well drilling, open‑pit mining exploration drilling, mine dewatering boreholes, and general geotechnical engineering drilling. Fits both rotary drill rigs and top‑drive drilling equipment. Works well for medium‑depth boreholes under normal weight‑on‑bit and rotary speed parameters.

Popular Target Countries & Markets

This concave reinforced 5‑wing PDC bit gains good market feedback in Romania, Philippines, Nigeria, Germany and many other Southeast Asian, African and European markets. Drilling contractors, local importers and drilling service companies widely select this model for mass field projects.

Customization Service

We offer flexible customization: special bit diameters, non‑standard thread replace 6 5/8 REG (NC, IF, FH etc.), cutter layout, carbide protection configuration. Send us your borehole demand or technical drawing, our engineering team will provide tailored PDC bit solution.