The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2001
Filed:
Sep. 18, 1998
Kuttaripalayam T. Kembaiyan, The Woodlands, TX (US);
Thomas W. Oldham, The Woodlands, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
A new composition for making an improved high-strength matrix body and methods of making the matrix body are disclosed. The new composition includes large-grain carburized tungsten carbide, an infiltration binder, and optionally cast tungsten carbide. The high-strength matrix body is formed from the new composition by an infiltration process. Suitable infiltration binders include all transition metals and all main group metals. To obtain optimal physical properties, large-grain carburized tungsten carbide is mixed with cast tungsten carbide and Ni powder before infiltration. The high-strength matrix body has improved braze strength. Such matrix bodies are suitable for manufacturing bit bodies for PDC drill bits and other earth-boring devices.