Patents by Inventor Dongpeng Zhao
Dongpeng Zhao 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: 11873684Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: GrantFiled: February 8, 2021Date of Patent: January 16, 2024Assignee: SF DIAMOND CO., LTD.Inventors: Dongpeng Zhao, Weifeng Du, Tongjian Niu, Tengfei Wen, Chunlin Zhang, Haijiang Fang
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Publication number: 20230416098Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. A radial line extends radially outward from a center axis of the first surface intersects each of a long axis of a subset of a plurality of extensions. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: August 31, 2023Publication date: December 28, 2023Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Publication number: 20230406711Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. The at least one extension of the plurality of extensions includes a first portion that is polyhedral shaped. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: August 31, 2023Publication date: December 21, 2023Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Patent number: 11772977Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: GrantFiled: July 19, 2019Date of Patent: October 3, 2023Assignee: SF Diamond Co., Ltd.Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Patent number: 11377910Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.Type: GrantFiled: August 18, 2019Date of Patent: July 5, 2022Assignee: SF DIAMOND CO., LTD.Inventors: Dongpeng Zhao, Weifeng Du, Shanshan Ma, Tongjian Niu, Haijiang Fang
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Publication number: 20210164296Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: ApplicationFiled: February 8, 2021Publication date: June 3, 2021Inventors: Dongpeng ZHAO, Weifeng DU, Tongjian NIU, Tengfei WEN, Chunlin ZHANG, Haijiang FANG
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Publication number: 20210009426Abstract: A polycrystalline element includes a table formed of polycrystalline diamond. The table includes a first surface; a second surface spaced apart from the first surface; and at least one side extending between the first surface and the second surface. The table also includes a plurality of extensions also formed of polycrystalline diamond, wherein at least one extension of the plurality of extensions extends away from at least one of the first surface and the at least one side. Optionally, the polycrystalline diamond of at least one extension of the plurality of extensions is contiguous with the polycrystalline diamond of the table. The polycrystalline element may be used in downhole tools for boring and well drilling, machine tools, and bearings.Type: ApplicationFiled: July 19, 2019Publication date: January 14, 2021Applicant: SF Diamond Co., Ltd.Inventors: Haijang Fang, Weifeng Du, Yongfeng Wang, Dongpeng Zhao
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Patent number: 10865152Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The cemented carbide substrate is cylindrical and includes a circumferential wall. The polycrystalline diamond layer includes a central part including between 8 and 15 wt. % of cobalt and an outer part including between 0.5 and 2 wt. % of cobalt. The outer part is a columnar ring belt and includes a chamfer. The outer part includes an upper surface, a side surface connected to the circumferential wall of the cemented carbide substrate, and a chamfer surface connecting the upper surface and the side surface. The chamfer includes a first terminal connected to the upper surface of the outer part and a second terminal connected to the side surface of the outer part.Type: GrantFiled: March 14, 2019Date of Patent: December 15, 2020Assignee: SF DIAMOND CO., LTD.Inventors: Caili Wang, Dongpeng Zhao, Saifei Yang, Haijiang Fang
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Publication number: 20200087758Abstract: A method for making a polycrystalline diamond compact. The method includes: 1) preparing a workblank of a polycrystalline diamond compact; and 2) thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact using laser. The thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact includes: employing a laser generator to produce a laser beam, expanding the laser beam, focusing the laser beam, to yield an energy concentration area on the surface of the workblank of the polycrystalline diamond compact, and etching the curved surface using the energy concentration area.Type: ApplicationFiled: November 21, 2019Publication date: March 19, 2020Inventors: Dongpeng ZHAO, Hongli LI, Shanshan MA, Tongjian NIU, Haijiang FANG
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Publication number: 20190368277Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.Type: ApplicationFiled: August 18, 2019Publication date: December 5, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Shanshan MA, Tongjian NIU, Haijiang FANG
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Publication number: 20190368276Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer disposed on the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a first curved surface, a second curved surface, and a side surface directly connected to the cemented carbide substrate. The first curved surface is connected to the second curved surface. The joint of the first curved surface and the second curved surface protrudes to form a first cutting edge. The joints of the first curved surface and the second curved surface and the side surface protrudes to form a plurality of second cutting edges.Type: ApplicationFiled: August 14, 2019Publication date: December 5, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Shanshan MA, Tongjian NIU, Haijiang FANG
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Publication number: 20190210931Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The cemented carbide substrate is cylindrical and includes a circumferential wall. The polycrystalline diamond layer includes a central part including between 8 and 15 wt. % of cobalt and an outer part including between 0.5 and 2 wt. % of cobalt. The outer part is a columnar ring belt and includes a chamfer. The outer part includes an upper surface, a side surface connected to the circumferential wall of the cemented carbide substrate, and a chamfer surface connecting the upper surface and the side surface. The chamfer includes a first terminal connected to the upper surface of the outer part and a second terminal connected to the side surface of the outer part.Type: ApplicationFiled: March 14, 2019Publication date: July 11, 2019Inventors: Caili WANG, Dongpeng ZHAO, Saifei YANG, Haijiang FANG
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Publication number: 20190203539Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.Type: ApplicationFiled: March 11, 2019Publication date: July 4, 2019Inventors: Dongpeng ZHAO, Weifeng DU, Tongjian NIU, Tengfei WEN, Chunlin ZHANG, Haijiang FANG
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Publication number: 20180318962Abstract: A method for making a polycrystalline diamond compact (PDC). The method includes: 1) preparing a workblank of a polycrystalline diamond compact (PDC); and 2) thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact (PDC) using laser. The thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact (PDC) includes: employing a laser generator to produce a laser beam, expanding the laser beam, focusing the laser beam, to yield an energy concentration area on the surface of the workblank of the polycrystalline diamond compact, and etching the curved surface using the energy concentration area.Type: ApplicationFiled: December 21, 2017Publication date: November 8, 2018Inventors: Dongpeng Zhao, Hongli Li, Shanshan Ma, Tongjian Niu, Haijiang Fang