Patents by Inventor Stewart N. Middlemiss

Stewart N. Middlemiss has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10543653
    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.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: January 28, 2020
    Assignee: SMITH INTERNATIONAL INC.
    Inventor: Stewart N. Middlemiss
  • Patent number: 10239273
    Abstract: HPHT press system includes a thermal insulation layer. The thermal insulation layer includes CsCl, CsBr, CsI, or a combination thereof, and the thermal insulation layer is electrically insulating. The thermal insulation layer may include a thermal insulation sleeve and/or a thermal insulation button for an HPHT cell.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: March 26, 2019
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Yahua Bao, J. Daniel Belnap, Stewart N. Middlemiss
  • Publication number: 20180169987
    Abstract: HPHT press system includes a thermal insulation layer. The thermal insulation layer includes CsCl, CsBr, CsI, or a combination thereof, and the thermal insulation layer is electrically insulating. The thermal insulation layer may include a thermal insulation sleeve and/or a thermal insulation button for an HPHT cell.
    Type: Application
    Filed: February 20, 2018
    Publication date: June 21, 2018
    Inventors: Yahua Bao, J. Daniel Belnap, Stewart N. Middlemiss
  • Publication number: 20170362899
    Abstract: An ultra-hard cutting element for use in a drill bit, such as a percussion drill bit, a rotary cone drill bit, a drag bit, or a reamer. The ultra-hard cutting element includes a base portion, an extension portion on an end of the base portion, and a lip on an outer surface of the extension portion. At least a portion of the outer surface of the extension portion includes an ultra-hard abrasive material. The ultra-hard abrasive material may be polycrystalline diamond or polycrystalline cubic boron nitride.
    Type: Application
    Filed: December 4, 2015
    Publication date: December 21, 2017
    Applicant: Smith International, Inc.
    Inventors: Lynn Belnap, Stewart N. Middlemiss
  • Publication number: 20170136722
    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.
    Type: Application
    Filed: October 3, 2016
    Publication date: May 18, 2017
    Inventor: Stewart N. Middlemiss
  • Patent number: 9586376
    Abstract: A high-pressure high-temperature cell including two or more thermal insulation layers is described. A high-pressure high-temperature cell including a current path through a thermal insulation layer, the current path being electrically connected to a heating element and having an indirect path through the thermal insulation layer, is also described. High-pressure high-temperature press systems including the foregoing high-pressure high-temperature cells alone or in combination are also disclosed.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 7, 2017
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Stewart N. Middlemiss, Yahua Bao, Lan Carter
  • Patent number: 9457533
    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.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 4, 2016
    Assignee: Smith International, Inc.
    Inventor: Stewart N. Middlemiss
  • Patent number: 8932376
    Abstract: Thermally stable diamond-bonded compacts include a diamond-bonded body having a thermally stable region extending a distance below a diamond-bonded body surface. The thermally stable region comprises a matrix first phase of bonded together diamond crystals, and a second phase interposed within the matrix phase. At least some population of the second phase comprises a reaction product formed between an infiltrant material and the diamond crystals at high pressure/high temperature conditions. The diamond bonded body further includes a polycrystalline diamond region that extends a depth from the thermally stable region and has a microstructure comprising a polycrystalline diamond matrix phase and a catalyst material disposed within interstitial regions of the matrix phase. The compact includes a substrate attached to the diamond-bonded body.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: January 13, 2015
    Assignee: Smith International, Inc.
    Inventor: Stewart N. Middlemiss
  • Patent number: 8881851
    Abstract: Thermally-stable polycrystalline diamond materials comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/catalyst material. The reaction product is disposed within interstitial regions of the polycrystalline diamond material that exists between the bonded diamond crystals. The first and second phases are formed during a single high pressure/high temperature process condition. The reaction product has a coefficient of thermal expansion that is relatively closer to that of the bonded together diamond crystals than that of the binder/catalyst material.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: November 11, 2014
    Assignee: Smith International, Inc.
    Inventors: John Daniel Belnap, Stewart N. Middlemiss, Anthony Griffo, Thomas W. Oldham, Kumar T. Kembaiyan
  • Patent number: 8852304
    Abstract: Thermally stable diamond bonded materials and compacts include a diamond body having a thermally stable region and a PCD region, and a substrate integrally joined to the body. The thermally stable region has a microstructure comprising a plurality of diamond grains bonded together by a reaction with a reactant material. The PCD region extends from the thermally stable region and has a microstructure of bonded together diamond grains and a metal solvent catalyst disposed interstitially between the bonded diamond grains. The compact is formed by subjecting the diamond grains, reactant material, and metal solvent catalyst to a first temperature and pressure condition to form the thermally stable region, and then to a second higher temperature condition to both form the PCD region and bond the body to a desired substrate.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: October 7, 2014
    Assignee: Smith International, Inc.
    Inventor: Stewart N. Middlemiss
  • Publication number: 20130266678
    Abstract: A thermal insulation layer for an HPHT cell, the thermal insulation layer including CsCl, CsBr, CsI, or a combination thereof, and the thermal insulation layer being electrically insulating; the thermal insulation layer including a thermal insulation sleeve and/or a thermal insulation button for an HPHT cell; a pressure transfer medium for an HPHT cell, the pressure transfer medium including CsBr, CsI or a combination thereof; and a pressure transfer medium for an HPHT cell, the pressure transfer medium including CsCl and additive, with the proviso that the additive does not include ZrO2 are disclosed. HPHT press systems that include a thermal insulation layer or a pressure transfer medium according to embodiments of the present disclosure are also disclosed.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 10, 2013
    Inventors: YAHUA BAO, J. DANIEL BELNAP, STEWART N. MIDDLEMISS
  • Publication number: 20130263748
    Abstract: A high-pressure high-temperature cell including two or more thermal insulation layers is described. A high-pressure high-temperature cell including a current path through a thermal insulation layer, the current path being electrically connected to a heating element and having an indirect path through the thermal insulation layer, is also described. High-pressure high-temperature press systems including the foregoing the high-pressure high-temperature cells alone or in combination are also disclosed.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 10, 2013
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: STEWART N. MIDDLEMISS, YAHUA BAO, LAN CARTER
  • Publication number: 20130104755
    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.
    Type: Application
    Filed: October 22, 2012
    Publication date: May 2, 2013
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: STEWART N. MIDDLEMISS
  • Patent number: 8056650
    Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750° C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra-hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body together by high pressure/high temperature process.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: November 15, 2011
    Assignee: Smith International, Inc.
    Inventors: Stewart N. Middlemiss, J. Daniel Belnap, Nephi Mourik, Thomas W. Oldham, Anthony Griffo
  • Patent number: 8057562
    Abstract: Thermally stable ultra-hard polycrystalline materials and compacts comprise an ultra-hard polycrystalline body that wholly or partially comprises one or more thermally stable ultra-hard polycrystalline region. A substrate can be attached to the body. The thermally stable ultra-hard polycrystalline region can be positioned along all or a portion of an outside surface of the body, or can be positioned beneath a body surface. The thermally stable ultra-hard polycrystalline region can be provided in the form of a single element or in the form of a number of elements. The thermally stable ultra-hard polycrystalline region can be formed from precursor material, such as diamond and/or cubic boron nitride, with an alkali metal catalyst material. The mixture can be sintered by high pressure/high temperature process.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: November 15, 2011
    Assignee: Smith International, Inc.
    Inventor: Stewart N. Middlemiss
  • Patent number: 7951455
    Abstract: A method for manufacturing an ultrahard compact includes assembling a mass of ultrahard material with a mass of substrate material such that the mass of ultrahard material extends radially outward a greater extent than the substrate material to compensate for a difference in the radial shrinkage of the ultrahard material compared to the substrate material during a sintering process. The method may further includes subjecting the assembled compact to a high pressure high temperature process mat results in the forming of an ultrahard compact including an ultrahard layer integrally bonded with a substrate.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: May 31, 2011
    Assignee: Smith International, Inc.
    Inventors: Christopher H Weis, Ronald K Eyre, Stewart N Middlemiss, David Iverson
  • Publication number: 20110056753
    Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750° C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra-hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body together by high pressure/high temperature process.
    Type: Application
    Filed: November 9, 2010
    Publication date: March 10, 2011
    Inventors: Stewart N. Middlemiss, J. Daniel Belnap, Nephi Mourik, Thomas W. Oldham, Anthony Griffo
  • Patent number: 7828088
    Abstract: Thermally stable ultra-hard compact constructions of this invention comprise an ultra-hard material body that includes a thermally stable region positioned adjacent a surface of the body. The thermally stable region is formed from consolidated materials that are thermally stable at temperatures greater than about 750° C. The thermally stable region can occupy a partial portion of or the entire ultra-hard material body. The ultra-hard material body can comprise a composite of separate ultra-hard material elements that each form different regions of the body, at least one of the regions being thermally stable. The ultra-hard material body is attached to a desired substrate, an intermediate material is interposed between the body and the substrate, and the intermediate material joins the substrate and body together by high pressure/high temperature process.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: November 9, 2010
    Assignee: Smith International, Inc.
    Inventors: Stewart N. Middlemiss, J. Daniel Belnap, Nephi Mourik, Thomas W. Oldham, Anthony Griffo
  • Publication number: 20100239483
    Abstract: Thermally stable diamond-bonded compacts include a diamond-bonded body having a thermally stable region extending a distance below a diamond-bonded body surface. The thermally stable region comprises a matrix first phase of bonded together diamond crystals, and a second phase interposed within the matrix phase. At least some population of the second phase comprises a reaction product formed between an infiltrant material and the diamond crystals at high pressure/high temperature conditions. The diamond bonded body further includes a polycrystalline diamond region that extends a depth from the thermally stable region and has a microstructure comprising a polycrystalline diamond matrix phase and a catalyst material disposed within interstitial regions of the matrix phase. The compact includes a substrate attached to the diamond-bonded body.
    Type: Application
    Filed: June 1, 2010
    Publication date: September 23, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Stewart N. Middlemiss
  • Patent number: 7757788
    Abstract: Ultrahard composite constructions comprise a plurality of first phases dispersed within a matrix second phase, wherein each can comprise an ultrahard material including PCD, PcBN, and mixtures thereof. The constructions are formed from a plurality of granules that are combined and sintered at HP/HT conditions. The granules include a core surrounded by a shell and both are formed from an ultrahard material or precursor comprising an ultrahard constituent for forming the ultrahard material. When sintered, the cores form the plurality of first phases, and the shells form at least a portion of the second phase. The ultrahard material used to form the granule core may have an amount of ultrahard constituent different from that used to form the granule shell to provide desired different properties. The ultrahard constituent in the granule core and shell can have approximately the same particle size.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: July 20, 2010
    Assignee: Smith International, Inc.
    Inventors: John Daniel Belnap, Anthony Griffo, Ronald K. Eyre, Stewart N. Middlemiss