Patents by Inventor Jeffrey B. Lund
Jeffrey B. Lund 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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Publication number: 20090320584Abstract: A method for conducting nondestructive internal inspection of a rotary drill bit used for drilling subterranean formations comprises communicating ultrasonic waves into a drill bit and detecting ultrasonic waves that are reflected by at least a portion of the drill bit. In some embodiments, the waves may be directed into the drill bit from within a longitudinal bore thereof. Reflected waves also may be detected from within the bore. The methods may be used to develop threshold acceptance criteria for classifying drill bits as acceptable or unacceptable to prevent catastrophic failures of drill bits during use. Systems and apparatuses are disclosed for conducting nondestructive ultrasonic inspection of a drill bit used for drilling subterranean formations. The systems and apparatuses may comprise an ultrasonic probe configured for insertion within an internal longitudinal bore of a drill bit. Drill bits are disclosed that are configured to facilitate nondestructive ultrasonic inspection thereof.Type: ApplicationFiled: September 3, 2009Publication date: December 31, 2009Applicant: BAKER HUGHES INCORPORATEDInventors: Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan, Terry D. Watts
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Patent number: 7631560Abstract: A method for conducting nondestructive internal inspection of a rotary drill bit used for drilling subterranean formations comprises communicating ultrasonic waves into a drill bit and detecting ultrasonic waves that are reflected by at least a portion of the drill bit. In some embodiments, the waves may be directed into the drill bit from within a longitudinal bore thereof. Reflected waves also may be detected from within the bore. The methods may be used to develop threshold acceptance criteria for classifying drill bits as acceptable or unacceptable to prevent catastrophic failures of drill bits during use. Systems and apparatuses are disclosed for conducting nondestructive ultrasonic inspection of a drill bit used for drilling subterranean formations. The systems and apparatuses may comprise an ultrasonic probe configured for insertion within an internal longitudinal bore of a drill bit. Drill bits are disclosed that are configured to facilitate nondestructive ultrasonic inspection thereof.Type: GrantFiled: April 17, 2007Date of Patent: December 15, 2009Assignee: Baker Hughes IncorporatedInventors: Jeffrey B. Lund, Nicholas J. Lyons, Eric C. Sullivan, Terry D. Watts
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Patent number: 7621351Abstract: A reaming tool includes a tubular body having a nose portion with a concave center. A plurality of blades defining junk slots therebetween extend axially behind the nose and taper outwardly from the exterior of the tubular body. Rotationally leading edges of the blades carry a plurality of cutting elements from the axially leading ends. Selected surfaces and edges of the blades bear tungsten carbide, which may comprise crushed tungsten carbide. The shell of the nose is configured to ensure drillout from the centerline thereof toward the side wall of the tubular body. A method of drilling out a reaming tool is also disclosed.Type: GrantFiled: May 11, 2007Date of Patent: November 24, 2009Assignee: Baker Hughes IncorporatedInventors: Lester I. Clark, John C. Thomas, Jeffrey B. Lund, Eric E. McClain
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Publication number: 20090217597Abstract: An abrasive-impregnated cutting structure for use in drilling a subterranean formation is disclosed. The abrasive-impregnated cutting structure may comprise a plurality of abrasive particles dispersed within a substantially continuous matrix, wherein the abrasive-impregnated cutting structure exhibits an anisotropic wear resistance. One or more of the amount, average size, composition, properties, shape, quality, strength, and concentration of the abrasive particles may vary within the abrasive-impregnated cutting structure. Anisotropic wear resistance may relate to a selected direction, such as, for example, one or more of an expected direction of engagement of the abrasive-impregnated cutting structure with the subterranean formation and an anticipated wear direction. Anisotropic wear resistance of an abrasive-impregnated cutting structure may be configured for forming or retaining a formation-engaging leading edge thereof.Type: ApplicationFiled: March 3, 2009Publication date: September 3, 2009Applicant: BAKER HUGHES INCORPORATEDInventors: Van J. Brackin, Jeffrey B. Lund, Danny E. Scott, Marcus R. Skeem, Matthew R. Isbell
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Patent number: 7497280Abstract: An abrasive-impregnated cutting structure for use in drilling a subterranean formation is disclosed. The abrasive-impregnated cutting structure may comprise a plurality of abrasive particles dispersed within a substantially continuous matrix, wherein the abrasive-impregnated cutting structure exhibits an anisotropic wear resistance. One or more of the amount, average size, composition, properties, shape, quality, strength, and concentration of the abrasive particles may vary within the abrasive-impregnated cutting structure. Anisotropic wear resistance may relate to a selected direction, such as, for example, one or more of an expected direction of engagement of the abrasive-impregnated cutting structure with the subterranean formation and an anticipated wear direction. Anisotropic wear resistance of an abrasive-impregnated cutting structure may be configured for forming or retaining a formation-engaging leading edge thereof.Type: GrantFiled: January 27, 2005Date of Patent: March 3, 2009Assignee: Baker Hughes IncorporatedInventors: Van J. Brackin, Jeffrey B. Lund, Danny E. Scott, Marcus R. Skeem, Matthew R. Isbell
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Publication number: 20080236900Abstract: A cutting element assembly for use on a rotary drill bit for forming a borehole in a subterranean formation. A cutting element assembly includes a cutting element having a substrate. The cutting element assembly additionally includes a superabrasive material bonded to the substrate. The substrate extends from an end surface to a back surface. A base member is also coupled to the back surface of the substrate. Additionally, a recess is defined in the base member and a structural element is coupled to the base member. The cutting element assembly also includes a biasing element configured to selectively bias the structural element.Type: ApplicationFiled: June 6, 2008Publication date: October 2, 2008Applicant: US Synthetic CorporationInventors: Craig H. Cooley, Timothy N. Sexton, David P. Miess, Jeffrey B. Lund
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Patent number: 7243745Abstract: A cutting element for a rotary drill bit that has a superabrasive member joined to a substrate at a three-dimensional interface is disclosed. The interface of the cutting element preferably incorporates a first ring pattern comprising a plurality of circumferentially arranged raised sections which are separated by a plurality of radially extending grooves. Also, the interface configuration may include at least a second ring pattern comprising a plurality of circumferentially arranged raised sections which are separated by a plurality of radially extending grooves. Radially adjacent ring patterns may substantially circumferentially overlap with one another. An interface of a cutting element including at least one ring pattern having an odd number of sections is also disclosed. Further, rotary drill bits including at least one such cutting element are disclosed.Type: GrantFiled: July 28, 2004Date of Patent: July 17, 2007Assignee: Baker Hughes IncorporatedInventors: Marcus R. Skeem, Danny E. Scott, Jeffrey B. Lund
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Patent number: 7188692Abstract: A superabrasive cutting element including a diamond or other superabrasive material table having a peripheral cutting edge defined by at least two adjacent chamfers having an arcuate surface substantially tangent to each of the at least two chamfers interposed therebetween. Methods of producing such superabrasive cutting elements and drill bits equipped with such superabrasive cutting elements are also disclosed.Type: GrantFiled: August 15, 2005Date of Patent: March 13, 2007Assignee: Baker Hughes IncorporatedInventors: Jeffrey B. Lund, Danny E. Scott, Marcus R. Skeem
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Patent number: 6935444Abstract: A superabrasive cutting element including a diamond or other superabrasive material table having a peripheral cutting edge defined by at least two adjacent chamfers having an arcuate surface substantially tangent to each of the at least two chamfers interposed therebetween. Methods of producing such superabrasive cutting elements and drill bits equipped with such superabrasive cutting elements are also disclosed.Type: GrantFiled: February 24, 2003Date of Patent: August 30, 2005Assignee: Baker Hughes IncorporatedInventors: Jeffrey B. Lund, Danny E. Scott, Marcus R. Skeem
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Publication number: 20040163854Abstract: A superabrasive cutting element including a diamond or other superabrasive material table having a peripheral cutting edge defined by at least two adjacent chamfers having an arcuate surface substantially tangent to each of the at least two chamfers interposed therebetween. Methods of producing such superabrasive cutting elements and drill bits equipped with such superabrasive cutting elements are also disclosed.Type: ApplicationFiled: February 24, 2003Publication date: August 26, 2004Inventors: Jeffrey B. Lund, Danny E. Scott, Marcus R. Skeem
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Patent number: 6739416Abstract: Enhanced stabilization is provided for an eccentric reaming tool when a pilot borehole is undersized with respect to a following pilot stabilization pad (PSP). Alternatively, offset of a rotational axis of at least a portion of the assembly including the reaming tool is employed to accomplish stabilization of the reaming tool. In either case, a reamed diameter larger than a physical diameter of the reaming tool may be drilled. More specifically, an enlarged PSP relative to pilot bit diameter or PSP offset or even pilot bit offset is employed in order to engage a PSP with the wall of a pilot borehole of greater diameter than a physical diameter of the pilot bit. The PSP or pilot drill bit, or both, may be laterally offset, angularly offset, or a combination thereof in order to effect substantially continuous PSP contact with the pilot borehole wall.Type: GrantFiled: March 13, 2002Date of Patent: May 25, 2004Assignee: Baker Hughes IncorporatedInventors: W. Gregory Presley, Christopher S. Charles, D. Jay Clinkscales, Jeffrey B. Lund, Matthew J. Meiners, Steven R. Radford, Robert A. Laing, Matthew D. Mumma
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Patent number: 6711969Abstract: A rotary-type earth-boring drag bit with cutters oriented at varied rake angles and methods for designing such drag bits. Specifically, cutters that are located sequentially adjacent radial distances from a longitudinal axis of the drill bit have cutting faces that are oriented at rake angles that differ from one another. These cutters may be located on the same blade of the drag bit or on different blades of the drag bit. The rake angles at which the cutting faces of these cutters are oriented may be based, at least in part, on the relative radial distances these cutters are spaced from the longitudinal axis of the drag bit, on the vertical positions of these cutters along the longitudinal axis of the drag bit, or in response to actual or simulated evaluations of the use of the drag bit to drill a subterranean formation.Type: GrantFiled: December 23, 2002Date of Patent: March 30, 2004Assignee: Baker Hughes IncorporatedInventors: Matthew J. Meiners, Jeffrey B. Lund, Thomas M. Harris
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Patent number: 6695080Abstract: A method and apparatus for reaming or enlarging a borehole with the ability to drill cement, cement float equipment, and debris out of a casing without substantial damage to the casing interior or the reaming apparatus. The reaming apparatus also provides enhanced protection from contact with the casing wall for selected structural features and elements thereof.Type: GrantFiled: April 10, 2002Date of Patent: February 24, 2004Assignee: Baker Hughes IncorporatedInventors: W. Gregory Presley, Christopher S. Charles, Steven R. Radford, Matthew J. Meiners, Mark E. Morris, D. Jay Clinkscales, Jeffrey B. Lund, Robert A. Laing, Matthew D. Mumma
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Publication number: 20040011159Abstract: A rotary-type earth-boring drag bit with cutters oriented at varied rake angles and methods for designing such drag bits. Specifically, cutters that are located sequentially adjacent radial distances from a longitudinal axis of the drill bit have cutting faces that are oriented at rake angles that differ from one another. These cutters may be located on the same blade of the drag bit or on different blades of the drag bit.Type: ApplicationFiled: December 23, 2002Publication date: January 22, 2004Inventors: Matthew J. Meiners, Jeffrey B. Lund, Thomas M. Harris
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Publication number: 20030173114Abstract: Enhanced stabilization is provided for an eccentric reaming tool when a pilot borehole is undersized with respect to a following pilot stabilization pad (PSP). Alternatively, offset of a rotational axis of at least a portion of the assembly including the reaming tool is employed to accomplish stabilization of the reaming tool. In either case, a reamed diameter larger than a physical diameter of the reaming tool may be drilled. More specifically, an enlarged PSP relative to pilot bit diameter or PSP offset or even pilot bit offset is employed in order to engage a PSP with the wall of a pilot borehole of greater diameter than a physical diameter of the pilot bit. The PSP or pilot drill bit, or both, may be laterally offset, angularly offset, or a combination thereof in order to effect substantially continuous PSP contact with the pilot borehole wall.Type: ApplicationFiled: March 13, 2002Publication date: September 18, 2003Inventors: W. Gregory Presley, Christopher S. Charles, D. Jay Clinkscales, Jeffrey B. Lund, Matthew J. Meiners, Steven R. Radford, Robert A. Laing, Matthew D. Mumma
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Rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles
Patent number: 6536543Abstract: A rotary-type earth-boring drag bit with cutters oriented at varied rake angles and methods for designing such drag bits. Specifically, cutters that are located sequentially adjacent radial distances from a longitudinal axis of the drill bit have cutting faces that are oriented at rake angles that differ from one another. These cutters may be located on the same blade of the drag bit or on different blades of the drag bit. The rake angles at which the cutting faces of these cutters are oriented may be based, at least in part, on the relative radial distances these cutters are spaced from the longitudinal axis of the drag bit, on the vertical positions of these cutters along the longitudinal axis of the drag bit, or in response to actual or simulated evaluations of the use of the drag bit to drill a subterranean formation.Type: GrantFiled: December 6, 2000Date of Patent: March 25, 2003Assignee: Baker Hughes IncorporatedInventors: Matthew J. Meiners, Jeffrey B. Lund, Thomas M. Harris -
Publication number: 20020166703Abstract: A method and apparatus for reaming or enlarging a borehole with the ability to drill cement, cement float equipment, and debris out of a casing without substantial damage to the casing interior or the reaming apparatus. The reaming apparatus also provides enhanced protection from contact with the casing wall for selected structural features and elements thereof.Type: ApplicationFiled: April 10, 2002Publication date: November 14, 2002Inventors: W. Gregory Presley, Christopher S. Charles, Steven R. Radford, Matthew J. Meiners, Mark E. Morris, D. Jay Clinkscales, Jeffrey B. Lund, Robert A. Laing, Matthew D. Mumma
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Rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles
Publication number: 20020066601Abstract: A rotary-type earth-boring drag bit with cutters oriented at varied rake angles. Specifically, cutters that are located sequentially adjacent radial distances from a longitudinal axis of the drill bit have cutting faces that are oriented at rake angles that differ from one another. These cutters may be located on the same blade of the drag bit or on different blades of the drag bit. The rake angles at which the cutting faces of these cutters are oriented may be based, at least in part, on the relative radial distances these cutters are spaced from the longitudinal axis of the drag bit, on the vertical positions of these cutters along the longitudinal axis of the drag bit, or in response to actual or simulated evaluations of the use of drag bit to drill a subterranean formation. Methods for designing drag bits are also disclosed.Type: ApplicationFiled: December 6, 2000Publication date: June 6, 2002Inventors: Matthew J. Meiners, Jeffrey B. Lund, Thomas M. Harris -
Patent number: 6145608Abstract: A superhard cutting element having a polished, low friction, substantially planar cutting face with a surface finish roughness of 10 .mu.in. or less and preferably 0.5 .mu.in. or less. A chamfered cutting edge and side surface of the superhard material table of the same surface finish roughness are also disclosed. The surface roughness of the aforementioned superhard material table portions may be reduced by mechanically smoothing and polishing according to one of several variations of the method of the invention.Type: GrantFiled: October 6, 1999Date of Patent: November 14, 2000Assignee: Baker Hughes IncorporatedInventors: Jeffrey B. Lund, Redd H. Smith, Trent N. Butcher
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Patent number: 6112836Abstract: A rotary drag bit being suitable for directional drilling. The bit includes a bit body from which extend radially-oriented blades carrying PDC cutters. The blades extend to primary gage pads, above which secondary gage pads are either longitudinally spaced or rotationally spaced, or both, defining a gap or discontinuity between the primary and secondary gage pads through which drilling fluid from adjacent junk slots may communicate laterally or circumferentially. Longitudinally leading edges of the secondary gage pads may carry cutters for smoothing the sidewall of the borehole. The tandem primary and secondary gage pads provide enhanced bit stability and reduced side cutting tendencies. The discontinuities between the primary and secondary gage pads enhance fluid flow from the bit face to the borehole annulus above the bit, promoting formation cuttings removal. The tandem gage arrangement also has utility in conventional bits not designed specifically for directional drilling.Type: GrantFiled: September 8, 1997Date of Patent: September 5, 2000Assignee: Baker Hughes IncorporatedInventors: John R. Spaar, James A. Norris, Christopher C. Beuershausen, Rudolf C. O. Pessier, Michael P. Ohanian, Roland Illerhaus, Jeffrey B. Lund, Michael L. Doster