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).
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Patent number: 10648049Abstract: 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: GrantFiled: April 14, 2015Date of Patent: May 12, 2020Assignee: Wellbore Integrity Solutions LLCInventors: Wenhui Jiang, Fengxiao Liu, Alan W. Lockstedt, Doyle Wayne Brinegar
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Patent number: 9816328Abstract: 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: GrantFiled: October 15, 2013Date of Patent: November 14, 2017Assignee: SMITH INTERNATIONAL, INC.Inventors: Wenhui Jiang, Alan W. Lockstedt
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Publication number: 20160305194Abstract: 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: ApplicationFiled: April 14, 2015Publication date: October 20, 2016Inventors: Wenhui Jiang, Fengxiao Liu, Alan W. Lockstedt, Doyle Wayne Brinegar
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Publication number: 20140103643Abstract: 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: ApplicationFiled: October 15, 2013Publication date: April 17, 2014Applicant: Smith International, Inc.Inventors: Wenhui Jiang, Alan W. Lockstedt
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Patent number: 8617289Abstract: 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: GrantFiled: August 12, 2008Date of Patent: December 31, 2013Assignee: Smith International, Inc.Inventors: Alan W. Lockstedt, Gregory T. Lockwood
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Patent number: 8596345Abstract: 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: GrantFiled: March 24, 2011Date of Patent: December 3, 2013Assignee: Smith International, Inc.Inventors: Yanmei Li, Alan W. Lockstedt, Sudarsanam Chellappa
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Patent number: 8342268Abstract: 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: GrantFiled: August 11, 2009Date of Patent: January 1, 2013Assignee: Smith International, Inc.Inventors: Alan W. Lockstedt, Gregory T. Lockwood
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Publication number: 20120255793Abstract: 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: ApplicationFiled: June 21, 2012Publication date: October 11, 2012Applicant: SMITH INTERNATIONAL, INC.Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
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Patent number: 8235149Abstract: 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: GrantFiled: December 30, 2009Date of Patent: August 7, 2012Assignee: Smith International, Inc.Inventors: Alan W. Lockstedt, Thomas W. Oldham
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Patent number: 8211203Abstract: 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: GrantFiled: August 12, 2008Date of Patent: July 3, 2012Assignee: Smith International, Inc.Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
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Publication number: 20120118559Abstract: 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: ApplicationFiled: March 24, 2011Publication date: May 17, 2012Applicant: SMITH INTERNATIONAL, INC.Inventors: Yanmei Li, Alan W. Lockstedt, Sudarsanam Chellappa
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Patent number: 7743857Abstract: 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: GrantFiled: May 6, 2008Date of Patent: June 29, 2010Assignee: Smith International, Inc.Inventors: Alan W. Lockstedt, Gary R. Portwood, Scott D. McDonough
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Publication number: 20100101869Abstract: 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: ApplicationFiled: December 30, 2009Publication date: April 29, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Alan W. Lockstedt, Thomas W. Oldham
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Publication number: 20100038147Abstract: 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: ApplicationFiled: August 11, 2009Publication date: February 18, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Alan W. Lockstedt, Gregory T. Lockwood
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Publication number: 20100038145Abstract: 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: ApplicationFiled: August 12, 2008Publication date: February 18, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Alan W. Lockstedt, Gregory T. Lockwood
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Patent number: 7644786Abstract: 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: GrantFiled: August 29, 2006Date of Patent: January 12, 2010Assignee: Smith International, Inc.Inventors: Alan W. Lockstedt, Thomas W. Oldham
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Publication number: 20090260893Abstract: 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: ApplicationFiled: August 12, 2008Publication date: October 22, 2009Applicant: SMITH INTERNATIONAL, INC.Inventors: Xiayang Sheng, Alan W. Lockstedt, Gregory T. Lockwood
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Publication number: 20090065261Abstract: 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: ApplicationFiled: May 6, 2008Publication date: March 12, 2009Applicant: SMITH INTERNATIONAL, INC.Inventors: Alan W. Lockstedt, Gary R. Portwood, Scott D. McDonough
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Publication number: 20080210473Abstract: 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: ApplicationFiled: November 13, 2007Publication date: September 4, 2008Applicant: SMITH INTERNATIONAL, INC.Inventors: Youhe Zhang, Guodong Zhan, Xiayang Sheng, Alan W. Lockstedt, Yuelin Shen, Hong Deng, Anthony Griffo, Madapusi K. Keshavan
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Publication number: 20080179104Abstract: 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: ApplicationFiled: November 13, 2007Publication date: July 31, 2008Applicant: SMITH INTERNATIONAL, INC.Inventors: Youhe Zhang, Guodong Zhan, Xiayang Sheng, Alan W. Lockstedt, Anthony Griffo, Yuelin Shen, Hong Deng, Madapusi K. Keshavan