Patents by Inventor Cary A. Roth
Cary A. Roth 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: 10760345Abstract: Cutting elements and hardfacing materials are in the form of a milled tooth having an uppermost first surface or crest and remaining surfaces such as flank surfaces and end surfaces extending downwardly away from crest. The crest has a hardfaced layer disposed thereon formed from a premium hardfacing material, and one or more of the remaining cutting element surfaces has a hardfaced layer formed from a hardfacing material different than the premium hardfacing material, wherein the hardfaced layer on the crest has a wear resistance at least 10% greater than that of the remaining cutting element hardfaced surfaces. The hardfaced layer on the crest may extend along a partial portion of one or more of the adjacent remaining cutting element surfaces.Type: GrantFiled: June 7, 2018Date of Patent: September 1, 2020Assignee: SMITH INTERNATIONAL, INC.Inventors: Cary A. Roth, Mingdong Cai
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Publication number: 20180283107Abstract: Cutting elements and hardfacing materials as disclosed herein are in the form of a milled tooth having an uppermost first surface or crest and remaining surfaces such as flank surfaces and end surfaces extending downwardly away from crest. The crest has a hardfaced layer disposed thereon formed from a premium hardfacing material, and one or more of the remaining cutting element surfaces has a hardfaced layer formed from a hardfacing material different than the premium hardfacing material, wherein the hardfaced layer on the crest has a wear resistance at least 10% greater than that of the remaining cutting element hardfaced surfaces. The hardfaced layer on the crest may extend along a partial portion of one or more of the adjacent remaining cutting element surfaces.Type: ApplicationFiled: June 7, 2018Publication date: October 4, 2018Inventors: Cary A. Roth, Mingdong Cai
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Patent number: 9381600Abstract: A method to manufacture a drill bit including constructing a bit head portion of the drill bit, constructing a bit shank portion of the drill bit, aligning the bit head portion with the bit shank portion, and electron beam welding a butted joint between the bit head portion and the bit shank portion.Type: GrantFiled: July 20, 2009Date of Patent: July 5, 2016Assignee: Smith International, Inc.Inventor: Cary A. Roth
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Publication number: 20160145945Abstract: A low collision damage bit may include one or more roller cones including a first material and a second material. The bit may have a bit axis and a bit body, and the second material of the one or more roller cones may be positioned farther from the bit axis than the bit body. The second material may have a hardness or yield strength less than the first material.Type: ApplicationFiled: November 18, 2015Publication date: May 26, 2016Inventors: Gary R. Portwood, Cary A. Roth, Luca Tedeschi
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Patent number: 8955734Abstract: A roller cone drill bit includes a bit body, at least one leg extending downward from the bit body, a journal on each leg, and a roller cone mounted on each journal. A ball race is configured between each journal and roller cone, and a plurality of retention balls is disposed within each ball race. A ball hole extends from the back face of each leg to the ball race, and a ball hole plug fits within the ball hole. The ball hole plug is secured to the leg by a friction stir weld.Type: GrantFiled: October 4, 2013Date of Patent: February 17, 2015Assignee: Smith International, Inc.Inventors: Russell J. Steel, Scott M. Packer, Cary A. Roth, Madapusi K. Keshavan
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Publication number: 20140374156Abstract: A method for reducing stress in a downhole tool. The method includes varying a temperature of the downhole tool by at least 5° C. Vibrational energy may be transferred to the downhole tool with a vibration device coupled to the downhole tool. The vibrational energy may cause the downhole tool to move with a frequency from about 10 Hz to about 5 kHz.Type: ApplicationFiled: June 18, 2014Publication date: December 25, 2014Inventors: Anthony Griffo, Ting Ren, Cary A. Roth
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Patent number: 8763881Abstract: A method for applying a wear reducing material to a tool used in a wellbore operation that includes welding a hardfacing alloy to a surface of the tool, wherein the welding comprises friction stirring the alloy into the tool's surface is disclosed. Methods of welding a preformed sleeve or width of wear reducing material using friction stirring are also disclosed.Type: GrantFiled: August 14, 2009Date of Patent: July 1, 2014Assignee: Smith International, Inc.Inventors: Madapusi K. Keshavan, Russell J Steel, Cary A. Roth, Shelton W. Alsup
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Publication number: 20140034394Abstract: A roller cone drill bit includes a bit body, at least one leg extending downward from the bit body, a journal on each leg, and a roller cone mounted on each journal. A ball race is configured between each journal and roller cone, and a plurality of retention balls is disposed within each ball race. A ball hole extends from the back face of each leg to the ball race, and a ball hole plug fits within the ball hole. The ball hole plug is secured to the leg by a friction stir weld.Type: ApplicationFiled: October 4, 2013Publication date: February 6, 2014Applicant: SMITH INTERNATIONAL, INC.Inventors: Russell J. Steel, Scott M. Packer, Cary A. Roth, Madapusi K. Keshavan
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Publication number: 20100078224Abstract: A roller cone drill bit includes a bit body, at least one leg extending downward from the bit body, a journal on each leg, and a roller cone mounted on each journal. A ball race is configured between each journal and roller cone, and a plurality of retention balls is disposed within each ball race. A ball hole extends from the back face of each leg to the ball race, and a ball hole plug fits within the ball hole. The ball hole plug is secured to the leg by a friction stir weld.Type: ApplicationFiled: December 2, 2009Publication date: April 1, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Russell J. Steel, Scott M. Packer, Cary A. Roth, Madapusi K. Keshavan
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Publication number: 20100071961Abstract: A roller cone drill bit includes a bit body and at least one leg extending downward from the bit body. Each leg includes an outer surface, a ball hole plug located in the outer surface, a shoulder, a shirttail, and a roller cone rotatably mounted to the leg. The outer surface of each leg is surface processed by friction stirring.Type: ApplicationFiled: December 2, 2009Publication date: March 25, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Russell J. Steel, Scott M. Packer, Cary A. Roth, Madapusi K. Keshavan
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Publication number: 20100038407Abstract: A method for applying a wear reducing material to a tool used in a wellbore operation that includes welding a hardfacing alloy to a surface of the tool, wherein the welding comprises friction stirring the alloy into the tool's surface is disclosed. Methods of welding a preformed sleeve or width of wear reducing material using friction stirring are also disclosed.Type: ApplicationFiled: August 14, 2009Publication date: February 18, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Madapusi K. Keshavan, Russell J Steel, Cary A. Roth, Shelton W. Alsup
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Publication number: 20100038408Abstract: A method for treating a wear reducing material welded to a surface of a tool used in a wellbore operation that includes friction stirring the wear reducing material into the surface of the tool is disclosed. Method for improving the properties of a wear reducing material on a tool are also disclosed.Type: ApplicationFiled: August 14, 2009Publication date: February 18, 2010Applicant: SMITH INTERNATIONAL, INC.Inventors: Madapusi K. Keshavan, Russell J Steel, Cary A. Roth, Shelton W. Alsup
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Publication number: 20100018353Abstract: A method to manufacture a drill bit including constructing a bit head portion of the drill bit, constructing a bit shank portion of the drill bit, aligning the bit head portion with the bit shank portion, and electron beam welding a butted joint between the bit head portion and the bit shank portion.Type: ApplicationFiled: July 20, 2009Publication date: January 28, 2010Applicant: SMITH INTERNATIONAL, INC.Inventor: Cary A. Roth
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Patent number: 6601475Abstract: A method is disclosed for forming a drill bit structure to which a cutting element is to be affixed. The method includes applying a layer of hardfacing material to a basic bit structure, removing the layer of hardfacing material in a location to which the cutting element is to be affixed, and forming an attachment structure at the location. In one embodiment, the removing is performed by electrode discharge machining. In one embodiment, the basic bit structure is a roller cone, and the cutting element is an insert adapted to be interference fit within a socket in the roller cone.Type: GrantFiled: July 31, 2001Date of Patent: August 5, 2003Assignee: Smith International, Inc.Inventors: Peter M. Davies, Dennis Bond, Hubert W. Penka, Jr., Cary Roth
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Publication number: 20020035895Abstract: A method is disclosed for forming a drill bit structure to which a cutting element is to be affixed. The method includes applying a layer of hardfacing material to a basic bit structure, removing the layer of hardfacing material in a location to which the cutting element is to be affixed, and forming an attachment structure at the location. In one embodiment, the removing is performed by electrode discharge machining. In one embodiment, the basic bit structure is a roller cone, and the cutting element is an insert adapted to be interference fit within a socket in the roller cone.Type: ApplicationFiled: July 31, 2001Publication date: March 28, 2002Inventors: Peter M. Davies, Dennis Bond, Hubert W. Penka, Cary A. Roth
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Patent number: 4944774Abstract: A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 80 mesh single crystal monotungsten carbide.Type: GrantFiled: March 27, 1989Date of Patent: July 31, 1990Assignee: Smith International, Inc.Inventors: Madapusi K. Keshavan, Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong
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Patent number: 4836307Abstract: A hard facing for teeth on a milled tooth rock bit comprises at least 65% by weight of a mixture of tungsten carbide particles and a balance of steel bonding the carbide particles together and to the cutter cone of the rock bit. The tungsten carbide particle mixture comprises from 35% to 80%, and preferably from 65% to 80%, by weight 20 to 30 mesh cemented tungsten carbide, and from 20% to 65%, and preferably from 20% to 35% by weight 40 to 89 mesh single crystal monotungsten carbide.Type: GrantFiled: December 29, 1987Date of Patent: June 6, 1989Assignee: Smith International, Inc.Inventors: Madapusi K. Keshavan, Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong
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Patent number: 4632401Abstract: A belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the static ring portion of the belleville seal and the outside diameter of the journal bearing is circumferentially welded using a high-energy beam source to form a hermetically sealed metallurgical bond therebetween.Type: GrantFiled: May 17, 1985Date of Patent: December 30, 1986Assignee: Smith International, Inc.Inventors: Nareshchandra J. Kar, Cary A. Roth
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Patent number: 4560175Abstract: This invention relates to a belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the static ring portion of the belleville seal and the outside diameter of the journal bearing is circumferentially welded using a high-energy beam source to form a hermetically sealed metallurgical bond therebetween.Type: GrantFiled: July 5, 1984Date of Patent: December 24, 1985Assignee: Smith International, Inc.Inventors: Nareshchandra J. Kar, Cary A. Roth