Back to results
US 2006/0032335 A1Published application
Bit body formed of multiple matrix materials and method for making the same
AssigneeSmith International, Inc.
InventorKumar Kembaiyan
Life of this patent
Estimating the term…
Abstract
Drill bit bodies are provided having one portion formed of one composition and a further portion formed of a different composition. The different compositions provide different functional properties to respective portions of the drill bit body. Methods for forming such drill bit bodies are also provided.
Claims30
A method for forming a drill bit body comprising:
- providing a mold;
- filling at least part of said mold with a first matrix powder to form a liner of a cavity that will extend into said drill bit body;
- filling at least part of said mold with a second matrix powder, different from the first matrix powder to form at least a portion of a blade, said blade extending from a core of the body;
- heating the mold with packed matrix powders to form the bit body;
- and
- removing the formed bit body from the mold.
3 more elements
A method for forming a drill bit body comprising:
- providing a mold;
- filling at least a part of said mold with a first matrix powder and a second matrix powder to form a drill bit body having a first portion formed of said first matrix powder and a second portion formed of said second matrix powder, said first matrix powder differing from said second matrix powder and said first portion being a feature selected from the group consisting of a core, a body outer surface portion, and a blade extending from the core to an outer surface of the body, and said second portion being a liner of a cavity that extends into said drill bit body;
- heating said mold with said matrix powders to form a drill bit body;
- and
- removing said drill bit body from the mold.
2 more elements
A method for forming a drill bit comprising:
- providing a mold;
- filling at least a part of said mold with a first matrix powder and a second matrix powder to form a drill bit body having a portion formed of said first matrix powder and a further portion formed of said second matrix powder, said first matrix powder differing from said second matrix powder and said portion being a feature selected from the group consisting of a core, an outer surface, a blade extending from the core, and a liner of a cavity that extends into said drill bit body;
- heating said mold with said matrix powders to form a drill bit body;
- removing said drill bit body from the mold;
- and
- attaching a cutter in said cavity.
3 more elements
Dependencies are inferred from the claim text.