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Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies

A drill bit body and drill bit technology, which is applied in the field of manufacturing this kind of earth-drilling rotary drill bit, and can solve the problems of low toughness and low strength

Inactive Publication Date: 2009-01-28
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the blank, model and any preforms used must be designed and fabricated separately
Although bit bodies comprising particle matrix composites can be significantly superior to prior art steel bit bodies in terms of wear and corrosion resistance, the low strength and toughness of such bit bodies limits their use in certain applications use

Method used

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  • Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies
  • Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies
  • Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies

Examples

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Embodiment Construction

[0038] The examples shown herein do not represent actual views of any particular material, device, system, or method, but are merely idealized representations used to describe the invention. Additionally, elements that are common between figures may retain the same numerical designation.

[0039] The term "green body" as used herein means unsintered.

[0040] As used herein, the term "green bit body" means an unsintered structure comprising discrete particles bound together with a binder, the structure being of such a size and shape as to allow The subsequent manufacturing process manufactures a bit body suitable for an earth-boring drill bit from this structure.

[0041] The term "brown body" as used herein means partially sintered.

[0042] As used herein, the term "brown bit body" means a partially sintered structure comprising a plurality of grains at least a portion of which has been partially grown together to provide at least partial bonding between adjacent grains, s...

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Abstract

Methods of forming bit bodies for earth-boring bits include assembling green components, brown components, or fully sintered components, 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 the green 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 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.

Description

[0001] priority statement [0002] This application claims priority to U.S. Patent Application Serial No. 11 / 272,439, filed November 10, 2005, and assigned to the assignee of the present invention, filed November 10, 2005, entitled " Related to U.S. Patent Application Serial No. 11 / 271,153, Inventors James A. Oxford, Jimmy W. Eason, Redd H. Smith, John H. Stevens, and Nicholas J. Lyons . technical field [0003] The present invention relates generally to earth-boring rotary drill bits, and methods of making such earth-boring rotary drill bits. More particularly, the present invention relates generally to earth-boring rotary drill bits including a bit body formed substantially from a particle matrix composite material, and methods of making such earth-boring drill bits. Background technique [0004] Rotary drill bits are commonly used to drill holes or wells in earth formations. Rotary drill bits include two main configurations. One configuration is the roller cone bit, w...

Claims

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Application Information

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IPC IPC(8): B22F3/12C22C29/00E21B10/00
CPCC22C29/14B22F2005/002B22F2998/10C22C29/06E21B10/54B22F2998/00B22F7/062C22C26/00B22F2005/001C22C29/16E21B10/00B22F7/08B22F3/162B22F3/15B22F3/1021
Inventor R·H·史密斯J·H·史蒂文斯J·L·达根N·J·莱昂斯J·W·伊森J·D·格拉德尼J·A·奥克斯福德B·J·克雷斯特
Owner BAKER HUGHES INC
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