Patents by Inventor Alan W. Lockstedt

Alan W. Lockstedt 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: 9816328
    Abstract: A heavy weight drill pipe for use in a downhole tool. The heavy weight drill pipe may include a tool joint made of as first steel alloy selected from the group consisting of AISI 4135, AISI 4137, AISI 4140, AISI 4142, AISI 4145, and AISI 4147. The tool joint may have as radial thickness between about 3.0 cm and about 5.7 cm. The heavy weight drill pipe may also include as pipe made of as second steel alloy selected from the group consisting of AISI 4135, AISI 4137, AISI 4140, AISI 4142, AISI 4145, and AISI 4147. The pipe may have a radial thickness between about 1.6 cm and about 3.3 cm. A weld region may be formed between the tool joint and the pipe. The weld region may be formed by friction welding the tool joint to the pipe.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: November 14, 2017
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Wenhui Jiang, Alan W. Lockstedt
  • Publication number: 20160305194
    Abstract: A heavy weight drill pipe may include a tube body formed of AISI 1340 alloy steel, and first and second tool joints at respective ends of the tube body, and which are formed of an AISI 41XX series alloy steel. The first and second tool joints may be welded to the tube body at a weld line within a weld region. A Charpy impact toughness at the weld line or surrounding weld region may be least 12 ft-lbs. (16.5 N-m). Yield and tensile strengths at the weld line or weld region may be at least 65 ksi (448.0 MPa) and at least 106 ksi (731.0 MPa), respectively. Material properties at the weld line or weld region may be achieved by heat treating after welding. Heat treating may include austenitizing, quenching, and tempering the weld line and/or the surrounding weld region.
    Type: Application
    Filed: April 14, 2015
    Publication date: October 20, 2016
    Inventors: Wenhui Jiang, Fengxiao Liu, Alan W. Lockstedt, Doyle Wayne Brinegar
  • Publication number: 20140103643
    Abstract: A heavy weight drill pipe for use in a downhole tool. The heavy weight drill pipe may include a tool joint made of as first steel alloy selected from the group consisting of AISI 4135, AISI 4137, AISI 4140, AISI 4142, AISI 4145, and AISI 4147. The tool joint may have as radial thickness between about 3.0 cm and about 5.7 cm. The heavy weight drill pipe may also include as pipe made of as second steel alloy selected from the group consisting of AISI 4135, AISI 4137, AISI 4140, AISI 4142, AISI 4145, and AISI 4147. The pipe may have as radial thickness between about 1.6 cm and about 3.3 cm. A weld region may be formed between the tool joint and the pipe. The weld region may be formed by friction welding the tool joint to the pipe.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 17, 2014
    Applicant: Smith International, Inc.
    Inventors: Wenhui Jiang, Alan W. Lockstedt
  • Patent number: 8617289
    Abstract: A hardfacing composition essentially consisting of from about 50 to 75 percent by weight of a carbide phase having a particle size distribution of ±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.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: December 31, 2013
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Gregory T. Lockwood
  • Patent number: 8596345
    Abstract: A sealing element for a rotating control device is disclosed, wherein the sealing element has an inner surface which forms a drillstring bore extending axially through the sealing element, an attachment end having a receiving cavity extending into the attachment end substantially parallel with the drillstring bore, a nose end opposite from the attachment end, wherein the nose end has an inner diameter smaller than the inner diameter of the attachment end, a throat region between the attachment end and the nose end, at least one soft elastomer region comprising a soft elastomer material having a hardness of 70 duro or less, and at least one stiff elastomer region comprising a stiff elastomer material having a hardness greater than 70 duro.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: December 3, 2013
    Assignee: Smith International, Inc.
    Inventors: Yanmei Li, Alan W. Lockstedt, Sudarsanam Chellappa
  • Patent number: 8342268
    Abstract: A drill bit that includes a bit body having a plurality of blades extending radially therefrom, wherein at least a portion of the bit body comprises a first matrix region comprising a plurality of primary carbide particles having an average mean free path of at least about 10 microns; and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades is disclosed.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: January 1, 2013
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Gregory T. Lockwood
  • Publication number: 20120255793
    Abstract: A drill bit is disclosed that has a bit body with 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. At least a portion of the plurality of blades has a first matrix region made of a plurality of first carbide particles separated by a first binder phase, wherein the plurality of first carbide particles have a mean free path of at least 40 microns.
    Type: Application
    Filed: June 21, 2012
    Publication date: October 11, 2012
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
  • Patent number: 8235149
    Abstract: A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: August 7, 2012
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Thomas W. Oldham
  • Patent number: 8211203
    Abstract: A matrix powder for forming a matrix bit body, the matrix powder essentially consisting of a plurality of carbide particles having a particle size distribution of ±20% of a median particle size; and a plurality of metal binder particles is disclosed.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: July 3, 2012
    Assignee: Smith International, Inc.
    Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
  • Publication number: 20120118559
    Abstract: A sealing element for a rotating control device is disclosed, wherein the sealing element has an inner surface which forms a drillstring bore extending axially through the sealing element, an attachment end having a receiving cavity extending into the attachment end substantially parallel with the drillstring bore, a nose end opposite from the attachment end, wherein the nose end has an inner diameter smaller than the inner diameter of the attachment end, a throat region between the attachment end and the nose end, at least one soft elastomer region comprising a soft elastomer material having a hardness of 70 duro or less, and at least one stiff elastomer region comprising a stiff elastomer material having a hardness greater than 70 duro.
    Type: Application
    Filed: March 24, 2011
    Publication date: May 17, 2012
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Yanmei Li, Alan W. Lockstedt, Sudarsanam Chellappa
  • Patent number: 7743857
    Abstract: A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gave curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: June 29, 2010
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Gary R. Portwood, Scott D. McDonough
  • Publication number: 20100101869
    Abstract: A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
    Type: Application
    Filed: December 30, 2009
    Publication date: April 29, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Alan W. Lockstedt, Thomas W. Oldham
  • Publication number: 20100038147
    Abstract: A drill bit that includes a bit body having a plurality of blades extending radially therefrom, wherein at least a portion of the bit body comprises a first matrix region comprising a plurality of primary carbide particles having an average mean free path of at least about 10 microns; and at least one cutting element for engaging a formation disposed on at least one of the plurality of blades is disclosed.
    Type: Application
    Filed: August 11, 2009
    Publication date: February 18, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Alan W. Lockstedt, Gregory T. Lockwood
  • Publication number: 20100038145
    Abstract: A hardfacing composition essentially consisting of from about 50 to 75 percent by weight of a carbide phase having a particle size distribution of ±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.
    Type: Application
    Filed: August 12, 2008
    Publication date: February 18, 2010
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Alan W. Lockstedt, Gregory T. Lockwood
  • Patent number: 7644786
    Abstract: A drill bit that includes a steel bit body having at least one blade thereon, at least one cutter pocket disposed on the at least one blade; at least one cutter disposed in the at least one cutter pocket; at least one recess formed in at least a portion of the surface of the at least one cutter pocket, wherein the recess is adjacent a leading face of the at least one blade; and an erosion resistant material in the at least one recess is disclosed.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: January 12, 2010
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Thomas W. Oldham
  • Publication number: 20090260893
    Abstract: A matrix powder for forming a matrix bit body, the matrix powder essentially consisting of a plurality of carbide particles having a particle size distribution of ±20% of a median particle size; and a plurality of metal binder particles is disclosed.
    Type: Application
    Filed: August 12, 2008
    Publication date: October 22, 2009
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
  • Publication number: 20090065261
    Abstract: A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gave curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
    Type: Application
    Filed: May 6, 2008
    Publication date: March 12, 2009
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Alan W. Lockstedt, Gary R. Portwood, Scott D. McDonough
  • Publication number: 20080210473
    Abstract: A composite body for cutting tools that includes a ductile phase; a plurality of carbide particles dispersed the ductile phase; and a plurality of nanotubes integrated into the composite body is disclosed. Methods of making such composite bodies and drill bits formed of such material are also disclosed.
    Type: Application
    Filed: November 13, 2007
    Publication date: September 4, 2008
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Youhe Zhang, Guodong Zhan, Xiayang Sheng, Alan W. Lockstedt, Yuelin Shen, Hong Deng, Anthony Griffo, Madapusi K. Keshavan
  • Publication number: 20080179104
    Abstract: A drill bit that includes a bit body; and at least one cutting element for engaging the formation disposed on the bit body, the at least one cutting element comprising: a ductile phase; a plurality of carbide particles dispersed in the ductile phase; and a plurality of nanotubes integrated into the cutting element is disclosed.
    Type: Application
    Filed: November 13, 2007
    Publication date: July 31, 2008
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Youhe Zhang, Guodong Zhan, Xiayang Sheng, Alan W. Lockstedt, Anthony Griffo, Yuelin Shen, Hong Deng, Madapusi K. Keshavan
  • Patent number: 7367413
    Abstract: A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gage curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: May 6, 2008
    Assignee: Smith International, Inc.
    Inventors: Alan W. Lockstedt, Gary R. Portwood, Scott D. McDonough