PDC Drill Bits

PDC bit adoption has risen sharply across India over the past two decades as operators shift toward directional and horizontal wells to maximise reservoir contact. In the prolific hydrocarbon basins — Cambay in Gujarat, Krishna-Godavari off the eastern coast, Cauvery in the south and the Assam-Arakan fold belt in the northeast — extended-reach and high-angle profiles have made the steerable, shock-tolerant behaviour of polycrystalline diamond compact bits the default choice over roller-cone tooling for many sections.

The geology favours PDC across a wide swathe of the Indian subsurface. Soft-to-medium Indian carbonates and shales shear cleanly under PDC cutters, where a tricone bit would crush slowly and wear out its bearings. The Cambay shale, for example, suits a 5- or 6-blade FastDrill for soft formations (S, SM), while the Bombay High limestone offshore, with harder interbedded stringers, calls for a layout for medium formations with hard interlayers (MH).

For the bulk of Indian directional work, the steel-body FastDrill line is the all-purpose option: it is designed for full-hole drilling of vertical, directional and horizontal wells, and depending on the geological environment it carries standard, optimal (high-performance) or premium cutters, with a second row of cutters (suffix B) on some models. Operators evaluating the trade-off in detail often start from our tricone bits comparison and the IADC code reference before committing to a bit programme.

Where the ground turns genuinely abrasive — the quartz-rich Barmer and wider Rajasthan sandstones being the classic case — the matrix-body FastDrillMatrix (149.2–311.1 mm) is the option: its matrix body gives high abrasion and erosion wear resistance in medium formations, including those with hard interlayers. For drillers weighing all three technologies on a given hole, our DTH vs tricone vs PDC guide lays out where each performs best.

Commercially, all API Spec 7-1 requirements are built into Volgaburmash design, development and manufacturing, under a quality management system certified to ISO 9001 (GOST R ISO 9001-2015) and INTI S.QS. We ship PDC bits from stock in Dubai and confirm the lead time to India with every quote.

Where PDC bits work

• Oil and gas: 12 1/4" and 8 1/2" sections in the shales and sandstones of Cambay, Krishna-Godavari and Barmer, in vertical, directional and horizontal wells (FastDrill, FastDrillMatrix).
• Borewells in alluvium and soft sedimentary rock of the Indo-Gangetic plain: the WaterDrill (WD) steel-body PDC series, 4"–11 7/32" (101.6–285.0 mm), is designed for soft formations and soft formations with medium interlayers.
• Exploration and methane-drainage boreholes: FDC bits, 3"–3 27/32" (76–98 mm) — see mining bits.

In fractured basalt, boulder beds or highly abrasive quartzite, a tricone bit is usually safer.

Steel body vs matrix body

Steel bodies allow tall blades and aggressive profiles, can be rebuilt and cost less; matrix bodies resist erosion and abrasion on long, high-flow runs.

PDC cutters and the IADC code

PDC cutters are usually 13, 16 or 19 mm: larger cutters drill faster in soft rock, smaller cutters survive harder rock. The fixed-cutter IADC code has four characters: body (M matrix, S steel), formation hardness 1–4, cutter size (1 = over 24 mm, 2 = 14–24 mm, 3 = 8–14 mm) and profile 1–4. An M323 is a matrix bit for medium formations with 14–24 mm cutters. Volgaburmash model codes instead give blades, cutter size and formation: FD516SM is a FastDrill with 5 blades and 16 mm cutters for soft formations with medium interlayers.

PDC bits in stock

We hold FastDrill steel-body PDC bits in Dubai, mostly in 8 1/2", plus sizes from 3 11/32" (85 mm) to 11 5/8", and a WiperTrip (WT) bit. The table below shows current stock. For borewell choices read DTH vs tricone vs PDC, and for codes the IADC chart.

What is the full form of PDC bit?

PDC stands for polycrystalline diamond compact. A PDC bit carries synthetic diamond cutters sintered onto tungsten carbide, which shear the rock like a plane.

PDC bit or tricone bit?

PDC is faster and lasts longer in soft to medium homogeneous formations; tricone is safer in hard, fractured or abrasive rock. Many wells combine both by section.

Do you have PDC drill bits in stock?

Yes, FastDrill steel-body bits, mostly 8 1/2". We ship from our Dubai warehouse by air or sea; the exact lead time is confirmed in each quotation.

Which PDC bit lines does Volgaburmash make?

For oil and gas: FastDrill (steel body, 83.0–444.5 mm), FastDrillMatrix (matrix body, 149.2–311.1 mm), SideTrack, WiperTrip, BicentricDrill and CoreBits. For water wells and construction: WaterDrill and ReverseCirculationBit, both with steel bodies.