Where PDC works best
- Soft to medium, homogeneous formations such as the Tertiary clastics offshore and the sandstones and shales of onshore basins.
- Long directional and horizontal sections run on downhole motors.
- Water wells in consolidated sediments without boulders.
In fractured, bouldery or very abrasive rock, a tricone bit remains the safer choice.
Steel body or matrix body
Steel bodies allow tall blades and aggressive profiles. VBM's matrix-body FastDrillMatrix bits offer high abrasion and erosion wear resistance.
The IADC code for PDC bits
Fixed-cutter bits use four characters: body material (S steel, M matrix), cutter density from 1 (25–50%) to 4 (over 90%), cutter size (1 = over 24 mm, 2 = 14–24 mm, 3 = 8–14 mm, 4 = under 8 mm) and profile from 1 (short fishtail) to 4 (long). An S223 is a steel-body bit with 50–75% cutter density, 14–24 mm cutters and a medium profile. VBM does not publish IADC codes for its PDC models; they are identified by blades, cutter size and formation category.
PDC bits in stock
We hold FastDrill steel-body PDC bits in Dubai, mostly in 8 1/2", plus sizes from 3 11/32" to 11 5/8". The table below shows current stock. When to run PDC versus tricone offshore is covered in the Stabroek Block guide.