PDC Drill Bits
PDC drill bits, or fixed cutters, come in either matrix or steel body. What’s the difference?
Matrix body fixed cutters are made from tungsten carbide material. This provides improved wear resistance and erosion.
Additionally, they are typically more heavy set as far as cutter count.
In applications of high fluid volume or high sand, matrix body bits offer longer life and multiple bit runs.
Steel body fixed cutters are made from a high alloy steel. These bits can sometimes be repaired and may be good for multiple runs, depending on the application.
Because steel is better able to withstand high impact, steel body bits are often designed with higher blade stand-off and cutter exposure, thus increasing ROP.
Cost of Matrix Vs. Steel
Cost is a major factor in drilling a well. Because tungsten carbide is more expensive than steel and matrix bodies generally contain more cutters, matrix is generally more expensive.