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Patent Searching and Data


Title:
INFILTRATED, MACHINED CARBIDE DRILL BIT BODY
Document Type and Number:
WIPO Patent Application WO/2010/005891
Kind Code:
A3
Abstract:
Methods of forming bit bodies for earth-boring bits include assembling green components that have been infiltrated, brown components that have been infiltrated, or fully sintered components that have been infiltrated, and sintering the assembled components. Other methods include isostatically pressing a powder to form a green body substantially composed of a particle-matrix composite material, and sintering or hot isostatic pressing the green body or brown body to provide a bit body having a desired final density. Methods of forming earth-boring bits include providing a bit body substantially formed of a particle-matrix composite material and attaching a shank to the body. The body is provided by pressing a powder to form a green body and sintering the green body. Earth-boring bits include a unitary structure substantially formed of a particle-matrix composite material. The unitary structure includes a first region configured to carry cutters and a second region that includes a threaded pin. Earth-boring bits include a shank attached directly to a body substantially formed of a particle-matrix composite material.

Inventors:
STEVENS JOHN H (US)
Application Number:
PCT/US2009/049681
Publication Date:
March 04, 2010
Filing Date:
July 06, 2009
Export Citation:
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Assignee:
BAKER HUGHES INC (US)
STEVENS JOHN H (US)
International Classes:
B22F7/06; B22F3/14; B22F5/00; B22F7/02; E21B10/50
Domestic Patent References:
WO2003049889A22003-06-19
Foreign References:
US20070102198A12007-05-10
US20070102199A12007-05-10
US6209420B12001-04-03
US20040245024A12004-12-09
Attorney, Agent or Firm:
WELBORN, Brian S. et al. (P.O. Box 4740Houston, TX, US)
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