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No. Publication Number Title Publication/Patent Number Publication/Patent Number Publication Date Publication Date
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1 WO2014052372A4
DOWNHOLE MILLS AND IMPROVED CUTTING STRUCTURES
Publication/Patent Number: WO2014052372A4 Publication Date: 2015-01-22 Application Number: 2013061556 Filing Date: 2013-09-25 Inventor: Sue, Jiinjen Albert   Sreshta, Harold A   Wright, Charles Leonard Ii   Assignee: SUE, JIINJEN, ALBERT   NATIONAL OILWELL DHT, L.P.   SRESHTA, HAROLD, A.   WRIGHT, CHARLES, LEONARD, II   IPC: C04B35/80 Abstract: A drill bit (10) for cutting through a downhole metal structure includes a bit body (12) having a central axis (11) and a bit face (20). The bit body is configured to rotate about the central axis in a cutting direction. In addition
2 WO2013055753A3
DISPERSION OF HARDPHASE PARTICLES IN AN INFILTRANT
Publication/Patent Number: WO2013055753A3 Publication Date: 2014-03-13 Application Number: 2012059490 Filing Date: 2012-10-10 Inventor: Sreshta, Harold A   Assignee: SRESHTA, HAROLD A.   NATIONAL OILWELL DHT, L.P.   IPC: B22F3/00 Abstract: Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a carbide which comprises at least 0.5 weight % of a binder and at least about 1% porosity. The composite material further comprises an infiltrant. Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a ...More ...Less
3 WO2013055753A4
DISPERSION OF HARDPHASE PARTICLES IN AN INFILTRANT
Publication/Patent Number: WO2013055753A4 Publication Date: 2014-05-15 Application Number: 2012059490 Filing Date: 2012-10-10 Inventor: Sreshta, Harold A   Assignee: SRESHTA, HAROLD A.   NATIONAL OILWELL DHT, L.P.   IPC: B22F3/00 Abstract: Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a carbide which comprises at least 0.5 weight % of a binder and at least about 1% porosity. The composite material further comprises an infiltrant. Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a ...More ...Less
4 WO2014052372A3
DOWNHOLE MILLS AND IMPROVED CUTTING STRUCTURES
Publication/Patent Number: WO2014052372A3 Publication Date: 2014-11-27 Application Number: 2013061556 Filing Date: 2013-09-25 Inventor: Sue, Jiinjen Albert   Sreshta, Harold A   Wright, Charles Leonard Ii   Assignee: SUE, JIINJEN, ALBERT   NATIONAL OILWELL DHT, L.P.   SRESHTA, HAROLD, A.   WRIGHT, CHARLES, LEONARD, II   IPC: C04B35/80 Abstract: A drill bit (10) for cutting through a downhole metal structure includes a bit body (12) having a central axis (11) and a bit face (20). The bit body is configured to rotate about the central axis in a cutting direction. In addition
5 WO2014052372A2
DOWNHOLE MILLS AND IMPROVED CUTTING STRUCTURES
Publication/Patent Number: WO2014052372A2 Publication Date: 2014-04-03 Application Number: 2013061556 Filing Date: 2013-09-25 Inventor: Sue, Jiinjen Albert   Sreshta, Harold A   Wright, Charles Leonard Ii   Assignee: SUE, JIINJEN, ALBERT   NATIONAL OILWELL DHT, L.P.   SRESHTA, HAROLD, A.   WRIGHT, CHARLES, LEONARD, II   IPC: C04B35/80 Abstract: A drill bit (10) for cutting through a downhole metal structure includes a bit body (12) having a central axis (11) and a bit face (20). The bit body is configured to rotate about the central axis in a cutting direction. In addition
6 WO2013055753A2
DISPERSION OF HARDPHASE PARTICLES IN AN INFILTRANT
Publication/Patent Number: WO2013055753A2 Publication Date: 2013-04-18 Application Number: 2012059490 Filing Date: 2012-10-10 Inventor: Sreshta, Harold A   Assignee: SRESHTA, HAROLD A.   NATIONAL OILWELL DHT, L.P.   IPC: B22F3/00 Abstract: Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a carbide which comprises at least 0.5 weight % of a binder and at least about 1% porosity. The composite material further comprises an infiltrant. Composite materials for use with a drill bit for drilling a borehole in earthen formations. The composite material comprises a first pre-infiltrated hardphase constituent and a second preinfiltrated hardphase constituent. The second pre-infiltrated hardphase constituent is a ...More ...Less
7 WO2013112708A1
HIGH THERMAL CONDUCTIVITY HARDFACING
Publication/Patent Number: WO2013112708A1 Publication Date: 2013-08-01 Application Number: 2013022925 Filing Date: 2013-01-24 Inventor: Sue, Jiinjen Albert   Sreshta, Harold A   Pillai, Rajagopala N   Assignee: Sue, Jiinjen Albert   SRESHTA, HAROLD A.   REEDHYCALOG, L.P.   PILLAI, RAJAGOPALA N.   IPC: C22C29/08 Abstract: A hardmetal composition comprises tungsten carbide in an amount greater than 50 weight percent of the hardmetal composition. In addition
8 WO2012078216A3
ENHANCED ELASTOMERIC STATOR INSERT VIA REINFORCING AGENT DISTRIBUTION AND ORIENTATION
Publication/Patent Number: WO2012078216A3 Publication Date: 2013-04-04 Application Number: 2011048796 Filing Date: 2011-08-23 Inventor: Butuc, Stefan   Sue, Jiinjen A   Sreshta, Harold A   Sicilian, Joshua A   Assignee: NATIONAL OILWELL VARCO, L.P.   BUTUC, STEFAN   SUE, JIINJEN, A.   SRESHTA, HAROLD, A.   SICILIAN, JOSHUA, A.   IPC: B23P15/00 Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber
9 WO2012056196A3
POLYCRYSTALLINE DIAMOND CUTTING ELEMENT
Publication/Patent Number: WO2012056196A3 Publication Date: 2013-06-27 Application Number: 2011001531 Filing Date: 2011-10-25 Inventor: Sue, Jiinjen Albert   Setlur, Deepthi Raj   Sreshta, Harold A   Gilleylen, Russell C   Zhan, Guodong   Hughes, Michael D   Francis, Mark Jonathan   Assignee: Sue, Jiinjen Albert   Setlur, Deepthi Raj   SRESHTA, HAROLD A.   GILLEYLEN, RUSSELL C.   ZHAN, GUODONG   NATIONAL OILWELL DHT, L.P.   HUGHES, MICHAEL D.   FRANCIS, MARK JONATHAN   IPC: B22F3/105 Abstract: A polycrystalline-diamond cutting clement (50) is disclosed for a drill bit of a downhole tool. The cutting element (50) includes a substrate (24) and a diamond table bonded to the substrate (24). The diamond table includes a diamond filler with at least one leached polycrystalline diamond segment (54) packed therein along at least one working surface thereof. The cutting element (50) may be formed by positioning the diamond table on the substrate (24) and bonding the diamond table onto the substrate (24) such that the polycrystalline diamond segment (54) is positioned along at least one working surface of the diamond table. A spark plasma sintering or double press operation may be used to bond the diamond table onto the substrate (24). A polycrystalline-diamond cutting clement (50) is disclosed for a drill bit of a downhole tool. The cutting element (50) includes a substrate (24) and a diamond table bonded to the substrate (24). The diamond table includes a diamond filler with at least one leached ...More ...Less
10 WO2012078216A2
ENHANCED ELASTOMERIC STATOR INSERT VIA REINFORCING AGENT DISTRIBUTION AND ORIENTATION
Publication/Patent Number: WO2012078216A2 Publication Date: 2012-06-14 Application Number: 2011048796 Filing Date: 2011-08-23 Inventor: Butuc, Stefan   Sue, Jiinjen A   Sreshta, Harold A   Sicilian, Joshua A   Assignee: NATIONAL OILWELL VARCO, L.P.   BUTUC, STEFAN   SUE, JIINJEN, A.   SRESHTA, HAROLD, A.   SICILIAN, JOSHUA, A.   IPC: B23P15/00 Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber
11 WO2012056196A2
POLYCRYSTALLINE DIAMOND CUTTING ELEMENT
Publication/Patent Number: WO2012056196A2 Publication Date: 2012-05-03 Application Number: 2011001531 Filing Date: 2011-10-25 Inventor: Sue, Jiinjen Albert   Setlur, Deepthi Raj   Sreshta, Harold A   Gilleylen, Russell C   Zhan, Guodong   Hughes, Michael D   Francis, Mark Jonathan   Assignee: Sue, Jiinjen Albert   Setlur, Deepthi Raj   SRESHTA, HAROLD A.   GILLEYLEN, RUSSELL C.   ZHAN, GUODONG   NATIONAL OILWELL DHT, L.P.   HUGHES, MICHAEL D.   FRANCIS, MARK JONATHAN   IPC: B22F3/105 Abstract: A polycrystalline-diamond cutting clement (50) is disclosed for a drill bit of a downhole tool. The cutting element (50) includes a substrate (24) and a diamond table bonded to the substrate (24). The diamond table includes a diamond filler with at least one leached polycrystalline diamond segment (54) packed therein along at least one working surface thereof. The cutting element (50) may be formed by positioning the diamond table on the substrate (24) and bonding the diamond table onto the substrate (24) such that the polycrystalline diamond segment (54) is positioned along at least one working surface of the diamond table. A spark plasma sintering or double press operation may be used to bond the diamond table onto the substrate (24). A polycrystalline-diamond cutting clement (50) is disclosed for a drill bit of a downhole tool. The cutting element (50) includes a substrate (24) and a diamond table bonded to the substrate (24). The diamond table includes a diamond filler with at least one leached ...More ...Less
12 US8066702B2
Combination electrical stimulating and infusion medical device and method
Publication/Patent Number: US8066702B2 Publication Date: 2011-11-29 Application Number: 12/033,232 Filing Date: 2008-02-19 Inventor: Rittman, Iii William J.   Vilims, Bradley D.   Assignee: Setlur, Deepthi Raj   Hughes, Michael D.   Francis, Mark Jonathan   Sreshta, Harold A.   Zhan, Guodong   Gilleylen, Russell C.   Sue, JiinJen Albert   IPC: A61B18/18 Abstract: A combined electrical and chemical stimulation lead is especially adapted for providing treatment to the spine and nervous system. The stimulation lead includes electrodes that may be selectively positioned along various portions of the stimulation lead in order to precisely direct electrical energy to ablate or electrically stimulate the target tissue. The invention also includes a method of activating electrodes in the electrical stimulation lead whereby an ablative lesion can be formed in a desired shape and size. The invention further includes a method of managing pain in a sacrum of a patient, and a method of assembling an electrical stimulation device. A combined electrical and chemical stimulation lead is especially adapted for providing treatment to the spine and nervous system. The stimulation lead includes electrodes that may be selectively positioned along various portions of the stimulation lead in order to precisely ...More ...Less
13 US2010078222A1
MATRIX TURBINE SLEEVE AND METHOD FOR MAKING SAME
Publication/Patent Number: US2010078222A1 Publication Date: 2010-04-01 Application Number: 12/239,915 Filing Date: 2008-09-29 Inventor: Sreshta, Harold A.   Sanchez, Hector Adrian   Drake, Eric F.   Desai, Neerali Janubhai   Assignee: Sreshta, Harold A.   Sanchez, Hector Adrian   Drake, Eric F.   Desai, Neerali Janubhai   IPC: E21B17/10 Abstract: A turbine matrix sleeve in accordance with the invention includes an inner cylindrical structure made up of a first material. The inner cylindrical structure may include multiple blades and multiple channels running between the blades along an outside diameter thereof. The inner cylindrical structure further includes threads, such as right-hand or left-hand threads, on an outer surface thereof. An outer layer, made up of a second material different from the first material, is integrally bonded to the threads. This outer layer may be optionally embedded with hardened inserts or buttons, such as PDC inserts, diamond inserts, TSP inserts, or the like. The threaded surface on the inner cylindrical structure significantly improves the bond between the outer layer and the inner cylindrical structure and creates a mechanical lock therebetween. A turbine matrix sleeve in accordance with the invention includes an inner cylindrical structure made up of a first material. The inner cylindrical structure may include multiple blades and multiple channels running between the blades along an outside diameter thereof. The inner ...More ...Less
14 US2002110474A1
Fabrication process for powder composite rod
Publication/Patent Number: US2002110474A1 Publication Date: 2002-08-15 Application Number: 09/683,030 Filing Date: 2001-11-09 Inventor: Sreshta, Harold A.   Drake, Eric F.   Assignee: Sreshta, Harold A.   Drake, Eric F.   IPC: B22F005/12 Abstract: The present invention relates to a method of forming a powder rod core comprising injecting a powder mix material into a mold, moving the mold to a curing station, and injecting material into a second mold.
15 US2001049019A1
Methods of treating preform elements
Publication/Patent Number: US2001049019A1 Publication Date: 2001-12-06 Application Number: 09/827,672 Filing Date: 2001-04-06 Inventor: Drake, Eric F.   Sreshta, Harold A.   Griffin, Nigel Dennis   Assignee: Drake, Eric F.   Sreshta, Harold A.   Griffin, Nigel Dennis   IPC: B32B031/26 Abstract: A method of thermally treating a preform element, of the kind having a facing table of polycrystalline diamond bonded to a substrate of cemented tungsten carbide, comprises the steps of: (a) heating the element to a soaking temperature of 550-625° C., and preferably about 600° C., (b) maintaining the element at that temperature for at least one hour, and (c) cooling the element to ambient temperature. The resulting preform element has a substrate with a cobalt binder including a substrate interface zone with at least 30 percent by volume of the cobalt binder a hexagonal close packed crystal structure. This reduces the risk of cracking or delamination of the element in use. A method of thermally treating a preform element, of the kind having a facing table of polycrystalline diamond bonded to a substrate of cemented tungsten carbide, comprises the steps of: (a) heating the element to a soaking temperature of 550-625° C., and preferably about ...More ...Less