Smith International, Inc.

Sandvik Intellectual Property Ab

Gregory Thomas Lockwood

Youhe Zhang

Anthony Griffo

Yuelin Shen

Yuri Y Burhan

Dah-Ben Liang

Jonan Fulenchek

Alan W Lockstedt

Madapusi K Keshavan

Zhigang Zak Fang

Thomas W Oldham

Jiaqing Yu

Mohammed Boudrare

Michael George Azar

Bala Durairajan

Alysia C White

Guodong Zhan

Jibin Shi

Ramamurthy Viswanadham

Xiayang Sheng

Jimykumar Prajapati

David A Conroy

Jonan Fulencheck

Methods for manufacturing a matrix tool body comprising placing a first matrix material within a first region of a mold cavity proximate a surface of the mold. A second matrix material may be placed within a second region of the mold cavity positioned inwardly of the first matrix material. The first matrix material and the second matrix material comprise a plurality of hard particles. The plurality of hard particles of the second matrix material have a median particle size that is less than the median particle size of the first matrix material. The plurality of hard particles of the first matrix material and the second matrix material are infiltrated with an infiltration binder to form the tool body. Also included are tool bodies having one or more regions proximate a surface of the tool body comprising an erosion resistant matrix material and/or a wear resistant matrix material.

Matrix tool bodies with erosion resistant and/or wear resistant matrix materials

Cutter assemblies include an outer support and a cutting element disposed therein. The cutting element is immovably attached to the outer support element. Also disclosed is downhole tools incorporating such cutter assemblies and methods of making such downhole tools.

Cutter assemblies, downhole tools incorporating such cutter assemblies and methods of making such downhole tools

A drill bit that includes a body having a lower end face for engaging a rock formation, the end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween; and at least one of the plurality of ribs having a cutting portion of the at least one rib comprising a first diamond impregnated matrix material and at least a portion of a gage surface region thereof comprising a second diamond impregnated matrix material, the gage surface region backed by a third matrix material is disclosed.

Diamond impregnated bits and method of using and manufacturing the same

A drill bit that includes a body having a lower end face for engaging a rock formation. The end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween At least one of the plurality of ribs has a varying width along at least a portion of a rib height.

Impregnated drill bit

In one aspect, an impregnated drill bit is provided having at least one insert positioned within at least one of the plurality of blades such that the insert spans more than 75% of the height of the blade and at least a portion of the blade has a blade height of at least 40 mm. In another aspect, an impregnated drill bit is provided having a plurality of blades with at least a portion of at least one blade having a blade height of at least 60 mm. Also provided are methods of manufacturing such impregnated drill bits.

Drill bits and methods of manufacturing such drill bits

A cutting element for engaging earthern formations having a wear surface formed from a low coefficient of thermal expansion (CTE) composition including a polycrystalline diamond or polycrystalline cubic boron nitride hard phase material and a ductile phase low CTE material formed from an alloy made of Co, Ni, Fe, C, and Mn. The hard phase material is bonded to one another by the ductile phase material to form the low CTE composition.

Low coefficient of thermal expansion cermet compositions

A method of manufacturing a drill bit having a bit body and a plurality of blades extending radially from the bit body is disclosed, wherein the method includes adhering a first matrix material to at least a portion of a mold cavity corresponding to an outer surface of the bit body, loading a second matrix material into the other portions of the mold cavity, and heating the mold contents to form a matrix body drill bit.

Method of manufacturing a drill bit

A drill bit may include a bit body having a plurality of blades extending radially therefrom and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades. The bit body has a continuous infiltration binder and a plurality of carbide particles dispersed in the continuous infiltration binder, wherein at least a portion of the plurality of carbide particles and at least a portion of the continuous infiltration binder form a first carbide matrix region, and wherein the plurality of carbide particles forming the first carbide matrix region have an average grain sizes of less than about 44 microns.

High strength infiltrated matrix body using fine grain dispersions

A method of brazing a top loading cutter into a cutter pocket is disclosed, wherein the method includes placing at least one braze disc between an inner wall of the cutter pocket and a portion of the top loading cutter and heating the at least one braze disc to a temperature above the melting temperature of the braze disc.

Special curve braze sheet for top loading cutter to get better braze strength

Cutter assemblies comprising an outer support element and a cutting element disposed therein. The cutting element is immovably attached to the outer support element. Also provided are downhole tools incorporating such cutter assemblies and methods of making such downhole tools.

A method of forming a cutting element that includes filling at least one non-planar region on an upper surface of a carbide substrate with a diamond mixture, subjecting the substrate and the diamond mixture to high pressure high temperature sintering conditions to form a reduced-CTE substrate having polycrystalline diamond that extends a depth into the reduced-CTE substrate in an interface region, and an upper surface made of a composite surface of diamond and carbide, and attaching a polycrystalline diamond body to the composite surface of the reduced-CTE substrate is disclosed.

Composite cutter substrate to mitigate residual stress

A hardfacing composition essentially consisting of from about 50 to 75 percent by weight of a carbide phase having a particle size distribution of &#xb1;20% or less of a median particle size; and from about 25 to 50 percent by weight of binder phase is disclosed. Drill bits having such hardfacing compositions disposed thereon are also disclosed.

Hardfacing compositions for earth boring tools

A drill bit that includes a bit body having a plurality of blades extending radially therefrom, at least a portion of the plurality of blades comprises a first matrix region comprising a plurality of first carbide particles separated by a first binder phase, each of the first carbide particles comprising a mixture of WC and WC, and wherein the first matrix region has less than about 5 percent by volume, based on the total volume of the first matrix region, of complex metal carbides dispersed in the first binder phase; and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades.

Matrix body fixed cutter bits

A drill bit has a matrix bit body with a lower end face for engaging a rock formation, wherein the end face has a plurality of raised impregnated ribs extending from the face of the bit body and separated by a plurality of channels therebetween. At least one of the plurality of ribs has a leading or trailing portion thereof comprising the same the matrix material as the bit body forming a continuous body matrix.

Growing community of inventors

Pearland, TX, United States of America

Gregory Thomas Lockwood