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公开(公告)号：GB2436974A
公开(公告)日：2007-10-10
申请号：GB0707821
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
Abstract: A method of forming a diamond impregnated cutting structure such as a cutter insert, involves placing uniformly coated diamond particles in a mould, cold pressing the coated particles and then heating the compacted coated particles with a matrix material to form the diamond impregnated cutting structure. The matrix material can be selected from various metal carbides and nitrides. The heating step may be at between 1500 F and 2100 F and may be a high temperature, high pressure process or an isostatic pressing. The heating step may also comprise a hot-pressing process followed by a high pressure, high temperature process. Also claimed is an insert for a drill bit characterised by a thermally stable shearing portion on a diamond impregnated body, where at least one of the structures has a thermally stable coating.
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公开(公告)号：DE102005048687A1
公开(公告)日：2006-05-11
申请号：DE102005048687
申请日：2005-10-11
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
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Patent Agency Ranking
公开(公告)号：GB2419617A
公开(公告)日：2006-05-03
申请号：GB0520563
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
Abstract: An insert for a drill bit that includes diamond particles disposed in a matrix material, wherein the diamond particles have a contiguity of 15% or less is disclosed. A method of forming a diamond-impregnated cutting structure, that includes loading a plurality of substantially uniformly coated diamond particles into a mold cavity, pre-compacting the substantially uniformly coated diamond particles using a cold-press cycle, and heating the compacted, substantially uniformly coated diamond particles with a matrix material to form the diamond impregnated cutting structure is also disclosed.
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公开(公告)号：GB2443574A
公开(公告)日：2008-05-07
申请号：GB0801250
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
Abstract: An insert for a drill bit is formed from diamond particles impregnated in a metal carbide matrix material. The diamond particles have a contiguity of 15%or less. The diamond particles can be of two different sizes and the metal carbide may include tungsten carbide, cast tungsten carbide, or sintered tungsten carbide-cobalt.
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公开(公告)号：GB2443574B
公开(公告)日：2008-09-03
申请号：GB0801250
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
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公开(公告)号：GB2436974B
公开(公告)日：2008-04-30
申请号：GB0707821
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
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公开(公告)号：GB2419617B
公开(公告)日：2007-08-22
申请号：GB0520563
申请日：2005-10-10
Applicant: SMITH INTERNATIONAL
Inventor： LOCKWOOD GREGORY T , OLDHAM THOMAS W , GRIFFO ANTHONY , KESHAVEN MADAPUSI K , CONROY DAVID A
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