Patents by Inventor Yahua Bao
Yahua Bao 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: 11952896Abstract: A tool for removing material includes a body, an ultrahard insert, and a matrix. The body has a forward portion, an opposing rear portion, and a longitudinal axis therebetween. The ultrahard insert includes an ultrahard material, and the ultrahard insert is mounted to and contacts the body proximate the forward portion. The matrix contacts the body and the ultrahard insert. The matrix is mechanically interlocked with the body and at least a portion of the matrix is positioned circumferentially around at least a portion of the forward portion of the body.Type: GrantFiled: September 27, 2019Date of Patent: April 9, 2024Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yahua Bao, J. Daniel Belnap, Francis E. Leany, Ronald B. Crockett, Dwain Norris, Anatoliy Garan
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Patent number: 11840891Abstract: Cutting elements include a carbonate diamond-bonded body that is sintered under HPHT conditions in the presence of a carbonate material, where the body includes a matrix phase of intercrystalline bonded diamond with interstitial regions including the carbonate material, where the diamond-bonded body is sintered without a substrate. A matrix casting is formed and mechanically coupled to the body after the body is sintered, and a portion of the body surface is exposed along a surface of the matrix casting. The exposed body surface is thereafter intentionally treated to induce a compressive residual surface stress that is greater than a remaining portion of the body. The compressive residual surface stress is less than about 500 MPa, and from about 100 to 500 MPa, and a remaining region the body may have a residual stress of less than about 300 MPa, and less than about 100 MPa.Type: GrantFiled: August 21, 2019Date of Patent: December 12, 2023Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: John Daniel Belnap, Yahua Bao
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Patent number: 11731092Abstract: A method of forming a polycrystalline diamond body includes mixing a sintering agent with diamond powder to form a premixed layer, the sintering agent including at least one alkaline earth metal carbonate; forming an infiltration layer adjacent to the premixed layer, the infiltration layer including an infiltrant material including at least one alkaline earth metal carbonate; and subjecting the premixed layer and the infiltration layer to high pressure high temperature conditions.Type: GrantFiled: May 23, 2019Date of Patent: August 22, 2023Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yahua Bao, J. Daniel Belnap, Anatoliy Garan, Michael David France
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Publication number: 20230257648Abstract: Luminescent diamond is made by subjecting a volume of diamond grains to high-pressure/high-temperature conditions with or without a catalyst or pressure transfer media to cause the grains to undergo plastic deformation to produce nitrogen vacancy defects, increasing the luminescent activity/intensity of the resulting diamond material. The consolidated diamond material may be further treated to further increase luminescent activity/intensity including reducing the consolidated diamond material to diamond particles, heat treatment in vacuum, and/or air heat treatment. The resulting luminescent diamond particles display a level of luminescence intensity greater than that of conventional luminescent nanodiamond, and may be functionalized for use in biological applications.Type: ApplicationFiled: July 14, 2021Publication date: August 17, 2023Inventors: Yahua Bao, J. Daniel Belnap
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Patent number: 11492852Abstract: A cutting device for use in a drill bit has a body including an ultrahard material. The body has a top surface, a front surface, and at least one lateral surface adjacent the top surface. The lateral surface is oriented at a surface angle relative to the top surface between 30 and 150 degrees. One or more locking features are located on the lateral surface.Type: GrantFiled: December 14, 2016Date of Patent: November 8, 2022Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yahua Bao, John Daniel Belnap, Gregory Caron, Feng Yu, Cheng Peng, Michael David France, John Parker, Anatoliy Garan
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Patent number: 11306542Abstract: A method of making a cutting element includes subjecting a mixture of diamond particles and a carbonate material to high-pressure high-temperature sintering conditions to form a sintered carbonate-polycrystalline diamond body having a diamond matrix of diamond grains bonded together and carbonates residing in the interstitial regions between the diamond grains, the carbonate material having a non-uniform distribution throughout the diamond matrix. The carbonate-polycrystalline diamond body is subjected to a controlled temperature, a controlled pressure condition or a combination thereof, to effect an at least partial decomposition of the carbonate material.Type: GrantFiled: September 9, 2014Date of Patent: April 19, 2022Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yahua Bao, Liang Zhao, J. Daniel Belnap, Zhijun Lin
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Publication number: 20210388723Abstract: A tool for removing material includes a body, an ultrahard insert, and a matrix. The body has a forward portion, an opposing rear portion, and a longitudinal axis therebetween. The ultrahard insert includes an ultrahard material, and the ultrahard insert is mounted to and contacts the body proximate the forward portion. The matrix contacts the body and the ultrahard insert. The matrix is mechanically interlocked with the body and at least a portion of the matrix is positioned circumferentially around at least a portion of the forward portion of the body.Type: ApplicationFiled: September 27, 2019Publication date: December 16, 2021Inventors: Yahua Bao, J. Daniel Belnap, Francis E. Leany, Ronald B. Crockett, Dwain Norris, Anatoliy Garan
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Patent number: 11066334Abstract: A method of sintering a binderless cBN body includes providing a boron nitride particle mixture into a pressure chamber, the boron nitride particle mixture having a first type of boron nitride particles and boron nitride filler particles, and the boron nitride filler particles having a different size and/or type than the first type of boron nitride particles, and sintering the boron nitride particle mixture in the pressure chamber to form the cBN body by generating a pressure in the pressure chamber of less than 7.7 GPa and heating the boron nitride particle mixture to a temperature ranging from about 1900° C. to about 2300° C., wherein the cBN body has a density of at least 97 percent.Type: GrantFiled: June 27, 2017Date of Patent: July 20, 2021Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventor: Yahua Bao
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Publication number: 20210172257Abstract: Cutting elements include a carbonate diamond-bonded body that is sintered under HPHT conditions in the presence of a carbonate material, where the body includes a matrix phase of intercrystalline bonded diamond with interstitial regions including the carbonate material, where the diamond-bonded body is sintered without a substrate. A matrix casting is formed and mechanically coupled to the body after the body is sintered, and a portion of the body surface is exposed along a surface of the matrix casting. The exposed body surface is thereafter intentionally treated to induce a compressive residual surface stress that is greater than a remaining portion of the body. The compressive residual surface stress is less than about 500 MPa, and from about 100 to 500 MPa, and a remaining region the body may have a residual stress of less than about 300 MPa, and less than about 100 MPa.Type: ApplicationFiled: August 21, 2019Publication date: June 10, 2021Inventors: John Daniel Belnap, Yahua Bao
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Patent number: 11021913Abstract: A cutting bit includes a body, a plurality of blades, and at least one ultrahard insert cast directly into at least one of the plurality of blades. The ultrahard insert is positioned with a rear face directly contacting the blade.Type: GrantFiled: December 14, 2016Date of Patent: June 1, 2021Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yahua Bao, John Daniel Belnap
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Patent number: 11014157Abstract: A method of making a polycrystalline diamond compact includes forming a first layer of polycrystalline diamond precursor materials comprising diamond particles and a first concentration of catalyst, forming a second layer of polycrystalline diamond precursor materials comprising diamond particles and a second concentration of catalyst, and placing a layer of an infiltrant material in the proximity of the first or the second layer of polycrystalline diamond precursor materials. The second concentration of catalyst is greater than the first concentration of catalyst. The infiltrant material is a catalyst. The first layer and the second layer are sintered under high-pressure high-temperature conditions in the presence of the infiltrant material to form the polycrystalline diamond compact. At least a portion of the catalyst is leached from the polycrystalline diamond compact.Type: GrantFiled: November 19, 2015Date of Patent: May 25, 2021Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventor: Yahua Bao
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Patent number: 10781643Abstract: A cutting element has an ultrahard layer on a substrate, the ultrahard layer having a non-planar working surface. The non-planar working surface is formed from a first region and a second region, where the first region encompasses at least a cutting edge or tip of the cutting element and has a differing composition than the second region.Type: GrantFiled: November 24, 2016Date of Patent: September 22, 2020Assignee: SMITH INTERNATIONAL, INC.Inventors: Yahua Bao, Yi Fang, Haibo Zhang, John Daniel Belnap, Youhe Zhang
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Patent number: 10442057Abstract: A polycrystalline diamond body, and a method for making a carbonate polycrystalline diamond body includes combining a first quantity of diamond particles with a first quantity of magnesium carbonate to form a first layer in an enclosure, the first layer having a working surface, and placing a second quantity of magnesium carbonate in the enclosure forming a second layer, the first layer and the second layer forming an assembly. A quantity of at least one of silicon or aluminum is mixed in with or placed adjacent to at least one of the first layer or the second layer. The assembly, including the at least one of silicon or aluminum, is sintered at high pressure and high temperature, causing the at least one of silicon or aluminum to infiltrate at least one layer of the assembly, forming a polycrystalline diamond body.Type: GrantFiled: December 19, 2016Date of Patent: October 15, 2019Assignee: SMITH INTERNATIONAL, INC.Inventor: Yahua Bao
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Publication number: 20190275484Abstract: A method of forming a polycrystalline diamond body includes mixing a sintering agent with diamond powder to form a premixed layer, the sintering agent including at least one alkaline earth metal carbonate; forming an infiltration layer adjacent to the premixed layer, the infiltration layer including an infiltrant material including at least one alkaline earth metal carbonate; and subjecting the premixed layer and the infiltration layer to high pressure high temperature conditions.Type: ApplicationFiled: May 23, 2019Publication date: September 12, 2019Inventors: Yahua Bao, J. Daniel Belnap, Anatoliy Garan, Michael David France
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Patent number: 10358705Abstract: A method of forming a polycrystalline diamond cutting element includes assembling a diamond material, a substrate, and a source of catalyst material or infiltrant material distinct from the substrate, the source of catalyst material or infiltrant material being adjacent to the diamond material to form an assembly. The substrate includes an attachment material including a refractory metal. The assembly is subjected to a first high-pressure/high temperature condition to cause the catalyst material or infiltrant material to melt and infiltrate into the diamond material and subjected to a second high-pressure/high temperature condition to cause the attachment material to melt and infiltrate a portion of the infiltrated diamond material to bond the infiltrated diamond material to the substrate.Type: GrantFiled: November 20, 2015Date of Patent: July 23, 2019Assignee: SMITH INTERNATIONAL, INC.Inventors: Yahua Bao, Fulong Wang, J. Daniel Belnap, Ronald K. Eyre, Yi Fang
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Patent number: 10352105Abstract: A method of making a polycrystalline diamond compact includes forming multiple layers of premixed diamond particles and carbonate material, where the carbonate material includes an alkaline earth metal carbonate, and where each layer has a weight percent ratio of diamond to carbonate that is different from adjacent layers. The layers are subjected to high pressure high temperature conditions to form polycrystalline diamond.Type: GrantFiled: September 26, 2016Date of Patent: July 16, 2019Assignee: SMITH INTERNATIONAL, INC.Inventors: Yahua Bao, Anatoliy Garan, Michael David France, John Daniel Belnap
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Patent number: 10350733Abstract: Methods for joining an ultra-hard body, such as a thermally stable polycrystalline diamond (TSP) body, to a substrate and mitigating the formation of high stress concentration regions between the ultra-hard body and the substrate. One method includes covering at least a portion of the ultra-hard body with an intermediate layer, placing the ultra-hard body and the intermediate layer in a mold, filling a remaining portion of mold with a substrate material including a matrix material and a binder material such that the intermediate layer is disposed between the ultra-hard body and the substrate material, and heating the mold to an infiltration temperature configured to melt the binder material and form the substrate.Type: GrantFiled: December 3, 2015Date of Patent: July 16, 2019Assignee: SMITH INTERNATIONAL, INC.Inventors: Liang Zhao, Xiaoge Gan, Yahua Bao, Yuri Y. Burhan, Youhe Zhang, J. Daniel Belnap, Zhijun Lin
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Publication number: 20190177236Abstract: A method of sintering a binderless cBN body includes providing a boron nitride particle mixture into a pressure chamber, the boron nitride particle mixture having a first type of boron nitride particles and boron nitride filler particles, and the boron nitride filler particles having a different size and/or type than the first type of boron nitride particles, and sintering the boron nitride particle mixture in the pressure chamber to form the cBN body by generating a pressure in the pressure chamber of less than 7.7 GPa and heating the boron nitride particle mixture to a temperature ranging from about 1900° C. to about 2300° C., wherein the cBN body has a density of at least 97 percent.Type: ApplicationFiled: June 27, 2017Publication date: June 13, 2019Inventor: Yahua Bao
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Patent number: 10315387Abstract: The present invention relates to tungsten-rhenium coated compounds, materials formed from tungsten-rhenium coated compounds, and to methods of forming the same. In embodiments, tungsten and rhenium are coated on ultra hard material particles to form coated ultra hard material particles, and the coated ultra hard material particles are sintered at high temperature and high pressure.Type: GrantFiled: June 30, 2016Date of Patent: June 11, 2019Assignee: SMITH INTERNATIONAL, INC.Inventors: Yahua Bao, Scott L. Horman
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Patent number: 10315175Abstract: A method of forming a polycrystalline diamond body includes mixing a sintering agent with diamond powder to form a premixed layer, the sintering agent including at least one alkaline eat mewl carbonate; forming an infiltration layer adjacent to the premixed layer, the infiltration layer including an infiltrant material including at least one alkaline earth metal carbonate; and subjecting the premixed layer and the infiltration layer to high pressure high temperature conditions.Type: GrantFiled: November 14, 2013Date of Patent: June 11, 2019Assignee: SMITH INTERNATIONAL, INC.Inventors: Yahua Bao, J. Daniel Belnap, Anatoliy Garan, Michael David France