Drill bit stud and method of manufacture

Patent · Tue Oct 23 00:00:00 EDT 1984

OSTI ID:5910937

Hake, L W; Huff, C F; Miller, J W

A polycrystalline diamond compact is a polycrystalline diamond wafer attached to a tungsten carbide substrate forming a disc. In this form, it is attached to a stud which is attached within a drill bit. The compact is attached to the stud with the aid of a positioning ring. When the stud is made of impact resistant material, a full pedestal may be formed on the stud to facilitate the use of the positioning ring. When the stud is made of brittle material, the positioning ring is attached to the flat face of the stud without a pedestal. The ring is positioned on a stud and the disc inserted in the ring so that the disc is positioned against the bonding surface. The disc remains in position against the bonding surface during the handling before and during the bonding process. As a second embodiment, the polycrystalline diamond compact is smaller than the disc itself and the remainder of the disc is formed of metal having the same thickness as the polycrystalline diamond compact or its tungsten carbide substrate. The shape of the smaller polycrystalline diamond compact may be semicircular, circular, polygon shaped, (i.e., triangular, square, etc.) or other geometric figures.

• Assignee: Petroleum Concepts Inc.
• Patent Number(s): US 4478298
• OSTI ID: 5910937
• Resource Relation: Patent File Date: Filed date 13 Dec 1982; Other Information: PAT-APPL-449137
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DRILL BITS
DESIGN
MANUFACTURING
COMPACTS
POLYCRYSTALS
SUBSTRATES
TUNGSTEN CARBIDES
CARBIDES
CARBON COMPOUNDS
CRYSTALS
DRILLING EQUIPMENT
EQUIPMENT
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)