Producing catalyst-free PDC cutters

G Zhan, TE Moellendick, B Li, CP Gooneratne… - US Patent …, 2024 - Google Patents
Cutters for a downhole drill bit can be formed by providing a catalyst-free synthesized
polycrystalline diamond (PCD) having a cross-sectional dimension of at least 8 millimeters; …

Bn) drilling tools made of wurtzite boron nitride (W-BN)

G Zhan, TE Moellendick, B Li, D He - US Patent 11,866,372, 2024 - Google Patents
Abstract Systems and methods include a computer-implemented method can be used to
make drilling tools from new wurtzite boron nitride (w-BN) superhard material. An ultra-high …