Fixed cutter drill bit heel and back-ream cutter protections for abrasive applications

a technology of fixed cutter and protection, which is applied in the direction of cutting machines, manufacturing tools, other chemical processes, etc., can solve the problems of significant wear to the heel surface of fixed cutters, inability to justify their higher cost, and wear to the gage region of fixed cutters
US20130153306A1Inactive Publication Date: 2013-06-20SMITH INT INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SMITH INT INC
Publication Date
2013-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method of manufacturing a fixed cutter drill bit may include loading a first matrix material of controlled thickness to at least a portion of a mold cavity corresponding to a heel surface of at least one blade; loading a second matrix material into the remaining portions of the mold cavity; heating the mold contents to form a matrix body of the fixed cutter drill bit; and disposing at least one back reaming element in at least one back reaming cutter pocket.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61 / 577348 filed Dec. 19, 2011, which is incorporated herein by reference in its entirety.BACKGROUND

[0002] Embodiments disclosed herein relate generally to fixed cutter drill bits. More particularly, embodiments disclosed herein relate to fixed cutter drill bit heel and back-ream cutter protections.BACKGROUND ART

[0003] An earth-boring drill bit is typically mounted on the lower end of a drill string and is rotated by rotating the drill string at the surface or by actuation of downhole motors or turbines, or by both methods. When weight is applied to the drill string, the rotating drill bit engages the earth formation and proceeds to form a borehole along a predetermined path toward a target zone.

[0004] Historically, there have been two main types of drill bits used for drilling earth formations, drag bits and roller cone bits. The term “drag bits” (also referre...

Claims

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