Patent · US Expired

Cutter head, drill bit and similar drilling tools

US4200159A · kind A · utility

129Cited by

9References

23Claims

0Family size

Assignee

Christensen, Inc. · US

Inventors

Eberhard Peschel · Celle, DE
Hermann Rathkamp · Celle, DE
Klaus Katzorke · Celle, DE
Rainer Jurgens · Celle, DE

Key dates

Filing date	Dec 2, 1977
Grant date	Apr 29, 1980
Priority date	—
Expiry date	Dec 2, 1997

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/573
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Tool for drilling bore holes and earth formations in which a bit body matrix, including tungsten carbide, has a plurality of carriers secured thereto, to each of which a cutting element is secured by soldering, after the body matrix has been produced, to avoid subjecting the diamond material embodied in the cutting element to the high temperatures required to produce the matrix body, which would have deleterious effects on the diamond. Each carrier has great rigidity and is provided with a plane surface confronted by the plane back surface of the cutting element to provide a desired narrow solder gap between the cutting element and carrier of uniform width, into which the solder is deposited to adhere the cutting element and carrier together, with the load being transmitted directly from the cutter element to the rigid carrier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.