Global Patent Index - EP 0370199 A1

EP 0370199 A1 1990-05-30 - Drill bits utilizing polycrystalline diamond grit.

Title (en)

Drill bits utilizing polycrystalline diamond grit.

Title (de)

Bohrmeissel mit polykristallinem Diamantsand.

Title (fr)

Tête de forage avec sable polycristallin de diamant.

Publication

EP 0370199 A1 (EN)

Application

EP 89117669 A

Priority

US 26291088 A

Abstract (en)

The present invention provides impregnated and surface set rotary drill bits wherein the cutting elements are thermally stable, mesh size polycrystalline diamond abrasive grit of from about 1 micron to about 2000 microns. Such drill bits can be used to drill a broader range of geological formations than could be drilled with prior art single crystal of polycrystalline diamond compact containing drill bits.

IPC 1-7

E21B 10/46

IPC 8 full level

E21B 10/46 (2006.01)

CPC

E21B 10/46 (2013.01)

Citation (search report)

DCS

BE DE ES FR GB SE

DOCDB simple family

EP 0370199 A1 19900530; JP H02171491 A 19900703