公开(公告)号：GB2362655B

公开(公告)日：2004-09-15

申请号：GB0105725

申请日：2001-03-08

Applicant: SMITH INTERNATIONAL

Inventor： FANG ZHIGANG ,  MIDDLEMISS STEWART ,  GRIFFO ANTHONY ,  EYRE RONALD K ,  WHITE BRIAN A

IPC: C09K3/14 ,  C22C26/00 ,  E21B10/52 ,  E21B10/56 ,  E21B10/567

Abstract: Polycrystalline diamond (PCD) carbide composites of this invention have a microstructure comprising a plurality of granules formed from PCD, polycrystalline cubic boron nitride, or mixture thereof, that are distributed within a substantially continuous second matrix region that substantially surrounds the granules and that is formed from a cermet material. In an example embodiment, the granules are polycrystalline diamond and the cermet material is cemented tungsten carbide. PCD carbide composites of this invention display improved properties of fracture toughness and chipping resistance, without substantially compromising wear resistance, when compared to conventional pure PCD materials.

公开(公告)号：CA2419752A1

公开(公告)日：2003-08-26

申请号：CA2419752

申请日：2003-02-25

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: C04B35/628 ,  C04B35/78 ,  C04B35/80 ,  C04B35/5831 ,  E21B10/46 ,  C04B35/52 ,  C04B35/64

Abstract: Ultra hard materials and ceramics reinforced with elongate ultra hard materi al particles and methods of forming the same are provided. These materials have improved toughness and damage tolerance and can be used on, or to form, tools such as cutting tools and various work pieces and parts.

公开(公告)号：GB2496047A

公开(公告)日：2013-05-01

申请号：GB201219156

申请日：2012-10-25

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: B01J3/06 ,  B30B11/00

Abstract: A container assembly 130 for a high pressure press having a central pressure cell 114 comprising: a container 132; and a gasket 134 meeting the container at an interface, the container and the gasket being dimensioned to locate the interface within the central pressure cell. The container may comprise a recess at the interface, wherein a portion of the gasket extends into the interface. The container may be a cube with a cut away edge, with the interface being defined by the cut away edge. The gasket may fit entirely within the volume previous occupied by said edge. When the gasket occupies this volume 134A, a second portion of the gasket 134B may extend away from the cube beyond this volume, for receipt between facing anvils 112 of the high pressure press. A high pressure press for use with the container, and a method of use for the container are also disclosed.

公开(公告)号：DE60301807T2

公开(公告)日：2006-06-29

申请号：DE60301807

申请日：2003-02-26

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: B23B27/14 ,  B23B51/00 ,  B22F3/10 ,  B22F7/06 ,  B23B27/20 ,  B23P15/28 ,  C04B35/52 ,  C04B41/50 ,  C04B41/85 ,  C23C24/08 ,  C23C30/00

Abstract: An ultra-hard semiconductive polycrystalline diamond (PCD) material formed with semiconductive diamond particles doped with Li, Be or Al and/or insulative diamond particles having semiconductive surfaces, tools incorporating the same, and methods for forming the same, are provided. The ultra-hard PCD material may be formed using a layer of insulative diamond grit feedstock that includes additives therein, then sintering to convert a plurality of the diamond crystals to include a semiconductive surface. In another embodiment, the ultra-hard PCD material is formed by sintering semiconductive diamond grit feedstock consisting of diamond crystals doped with Li, Al or Be. The ultra-hard semiconductive PCD cutting layer exhibits increased cuttability, especially in EDM and EDG cutting operations.

公开(公告)号：ZA200309667B

公开(公告)日：2004-08-03

申请号：ZA200309667

申请日：2003-12-12

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: C04B35/5831 ,  E21B10/56 ,  E21B10/567 ,  E21B ,  E21C

公开(公告)号：CA2451825A1

公开(公告)日：2004-07-21

申请号：CA2451825

申请日：2003-12-02

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: C04B35/5831 ,  E21B10/56 ,  E21B10/567 ,  E21B10/46

Abstract: A cutting element and bit incorporating the cutting element is provided, as well as a method for forming the same. The cutting element includes an ultra hard material layer including chromium and carbon and exhibiting increased abrasion resistance without sacrificing toughness. The method for manufacturing the cutting element includes providing a layer of ultra hard material particles and chromium carbide over the substrate, and then sintering to form the cutting element.

公开(公告)号：ZA200301567B

公开(公告)日：2003-10-28

申请号：ZA200301567

申请日：2003-02-26

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: C04B35/628 ,  C04B35/78 ,  C04B35/80 ,  E21B

Abstract: Ultra hard materials and ceramics reinforced with elongate ultra hard material particles and methods of forming the same are provided. These materials have improved thoughness and damage tolerance and can be used on, or to form tools such as cutting tools and various work pieces and parts.

公开(公告)号：CA2419709A1

公开(公告)日：2003-08-26

申请号：CA2419709

申请日：2003-02-25

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: B23B51/00 ,  B22F3/10 ,  B22F7/06 ,  B23B27/14 ,  B23B27/20 ,  B23P15/28 ,  C04B35/52 ,  C23C24/08 ,  C23C30/00 ,  C30B29/04 ,  E21B10/46

Abstract: An ultra-hard semiconductive polycrystalline diamond (PCD) material formed with semiconductive diamond particles doped with Li, Be or Al and/or insulative diamond particles having semiconductive surfaces, tools incorporating the same, and methods for forming the same, are provided. The ultra-hard PCD material may be forme d using a layer of insulative diamond grit feedstock that includes additives therein , then sintering to convert a plurality of the diamond crystals to include a semiconductive surface. In another embodiment, the ultra-hard PCD material is formed by sintering semiconductive diamond grit feedstock consisting of diamond crystals doped with Li, Al or B e. The ultra-hard semiconductive PCD cutting layer exhibits increased cuttability, especially in EDM and EDG cutting operations.

公开(公告)号：GB2369841A

公开(公告)日：2002-06-12

申请号：GB0127857

申请日：2001-11-21

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART ,  EYRE RONALD K

IPC: B23C5/20 ,  C04B37/02 ,  E21B10/56 ,  E21B10/567 ,  E21B10/573 ,  E21B10/46

Abstract: A cylindrical cutting element comprises a substrate 2 provided with a face of ultra hard material 4 at one end. At the interface 3 between the substrate and the ultra hard material is a first concave depression 34 which extends radially outwards from near the centre of the element to the outer edge. A second depression 12, formed on the surface 5 of the ultra hard material 4, also extends radially from near the centre and may be aligned over the first depression 34. The first and second depressions may increase in width and depth as they extend radially outwards. Further depressions may be formed on the interface and the exposed surface of the ultra hard material. In addition, smaller, secondary depressions (38, figures 5 and 6) may be made around the first and second depressions 34 and 12. Transition layers (42, figure 7) may be placed between the substrate and the ultra hard material, having properties intermediate the two, and a circumferential groove (68, figure 9) may be formed in the outer surface of the substrate 2 and filled with additional ultra hard material.

公开(公告)号：GB2496047B

公开(公告)日：2015-07-15

申请号：GB201219156

申请日：2012-10-25

Applicant: SMITH INTERNATIONAL

Inventor： MIDDLEMISS STEWART

IPC: B01J3/06 ,  B30B11/00

Abstract: A container assembly for use in a high-pressure press having a central pressure cell and a method of sealing a central pressure cell. The container assembly includes a container that receives a sample to be pressed, and a gasket distinct from the container, the gasket meeting the container at an interface. The container and the gasket are dimensioned to locate the interface within the central pressure cell.