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    Polycrystalline Diamond Comprising Nanostructured Polycrystalline Diamond Particles and Method of Making the Same
    2.
    发明申请
    Polycrystalline Diamond Comprising Nanostructured Polycrystalline Diamond Particles and Method of Making the Same 审中-公开

    公开(公告)号：US20200239370A1

    公开(公告)日：2020-07-30

    申请号：US16262529

    申请日：2019-01-30

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: C04B35/52 ,  C04B35/645 ,  B01J3/08 ,  E21B10/567

    Abstract: The present invention relates to a polycrystalline diamond and a polycrystalline diamond compact comprising a continuous network of interbonded diamond constituents comprising nanostructured polycrystalline diamond particles and catalyst material located at the interstitial space among the diamond constituents, and method of making the same. The nanostructured polycrystalline diamond particles are from starting raw materials of Carbonado-type nanostructured polycrystalline diamond particles with a size of between 1 μm-40 μm. The diamond constituents may comprise micrometer-scale monocrystalline diamond particles. The catalyst material in the polycrystalline diamond or the polycrystalline diamond compact may be removed partially or completely by a leaching process. The method of making the polycrystalline diamond or the polycrystalline diamond compact comprises sintering diamond particles comprising the Carbonado-type nanostructured polycrystalline diamond particles with a size of between 1 μm-40 μm under high temperature and high pressure in the presence of the catalyst material.

    Polycrystalline diamond compact cutters having protective barrier coatings
    3.
    发明授权
    Polycrystalline diamond compact cutters having protective barrier coatings 有权

    公开(公告)号：US10704334B2

    公开(公告)日：2020-07-07

    申请号：US15978031

    申请日：2018-05-11

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: E21B10/567 ,  C23C14/18 ,  C23C14/06 ,  C23C14/02 ,  C22C26/00

    Abstract: The present disclosure relates to a polycrystalline diamond compact (PDC) cutter with protective barrier coating. The PDC cutter consists of an unleached or leached polycrystalline diamond (PCD) table, a cemented carbide body substrate, and a coating disposed on the cutter. The coating covers at least partially the exterior surfaces of the PCD table of the PDC cutter, and it may also extend over partially or entirely the exterior surfaces of the cemented carbide body. The coating is either a single layer or multilayer. The coating has a thickness of 0.4 μm-100 μm. The coating may have a strong metallurgical bonding with PDC cutter. The coating comprises an oxidation-resistant layer that protects the PDC cutter from thermal and mechanical degeneration during brazing and cutting applications. Methods for preparing such the coating comprise physical vapor deposition, chemical vapor deposition, thermoreactive deposition and diffusion, electrical plating, electroless plating, or their combinations.

    Method for post-extracting low acyl gellan gum
    4.
    发明授权
    Method for post-extracting low acyl gellan gum 有权
    低酰基结冷胶胶提取方法

    公开(公告)号：US08609377B2

    公开(公告)日：2013-12-17

    申请号：US13142396

    申请日：2010-06-02

    Applicant: Baoyi Yang ,  Binghua Wu ,  Huaiyuan Xu ,  Zhengxue Zhu ,  Yubin Shen ,  Xuegang Wang ,  Liqiang Yang ,  Jialiang Wang ,  Wenhui Jiang ,  Shengqiang Bao ,  Xiaolin Sheng ,  Xiaoqin Shen

    Inventor： Baoyi Yang ,  Binghua Wu ,  Huaiyuan Xu ,  Zhengxue Zhu ,  Yubin Shen ,  Xuegang Wang ,  Liqiang Yang ,  Jialiang Wang ,  Wenhui Jiang ,  Shengqiang Bao ,  Xiaolin Sheng ,  Xiaoqin Shen

    IPC: C08B37/00

    CPC classification number: C12P19/04 ,  C08B37/006

    Abstract: The present invention relates to a post extraction process for preparing low acyl gellan, comprising the steps: deacylation treatment of gellan gum-containing fermentation broth, enzyme treatment, flocculation of low acyl gellan gum with divalent or polyvalent metal cations, clarification treatment of gellan gum solution, dehydration treatment of gellan gum solution, removal of divalent or polyvalent cations and decoloration, and drying and milling. Preferably, the process comprises the step of formulating a proper amount of chelating agent/acid system before the drying and milling step to chelate the added additional divalent cations added during the use of gellan gum, and at the same time to keep the pH value in a relatively stable condition. The present invention also provides the various low acyl gellan gums prepared by the above methods. The product has the following characteristics: a good appearance, a high transmittancy, and high gel strength. In particular, the chromaticity of the product is above 83%, the transmittancy is above 85%, and the gel strength is above 400 g/cm2.

    Abstract translation: 本发明涉及一种制备低酰基结冷胶的后萃取方法，包括以下步骤：含有结冷胶的发酵液的脱酰基处理，酶处理，低级酰基结兰兰胶与二价或多价金属阳离子的絮凝，澄清处理吉兰糖 溶液，结冷胶的脱水处理，二价或多价阳离子的去除和脱色，以及干燥和研磨。 优选地，该方法包括在干燥和研磨步骤之前配制适量的螯合剂/酸系的步骤，以螯合在使用结冷胶中加入的添加的另外的二价阳离子，并同时将pH值保持在 一个比较稳定的条件。 本发明还提供了通过上述方法制备的各种低酰基结冷胶。 该产品具有以下特点：外观美观，透光率高，凝胶强度高。 特别是，产品的色度高于83％，透光率高于85％，凝胶强度高于400g / cm 2。

    Polycrystalline Diamond Compact Cutter with Low Cobalt Content Cemented Tungsten Carbide Substrate
    6.
    发明申请
    Polycrystalline Diamond Compact Cutter with Low Cobalt Content Cemented Tungsten Carbide Substrate 审中-公开

    公开(公告)号：US20190242191A1

    公开(公告)日：2019-08-08

    申请号：US16240751

    申请日：2019-01-06

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: E21B10/573 ,  C04B37/02 ,  C22C29/08 ,  C22C26/00 ,  B22F7/06

    CPC classification number: E21B10/5735 ,  B22F7/06 ,  B22F2005/001 ,  C04B37/021 ,  C22C26/00 ,  C22C29/08

    Abstract: The present invention relates to a polycrystalline diamond compact cutter with a low cobalt content cemented tungsten carbide substrate having a coating covering at least a portion of the carbide substrate and the method of making the same. The carbide substrate has a content of three to ten percent by weight on average of cobalt or its alloy as a binder. The coating covers at least partially the exterior surfaces of the carbide substrate, and it may extend over partially or entirely the polycrystalline diamond table. The coating is either a single layer or multilayer. The coating comprises at least a metallic layer. The coating has a thickness of 0.1 μm-100 μm. The coating may have a metallurgical bonding with the polycrystalline diamond compact cutter. Methods for preparing such coating comprise physical vapor deposition, chemical vapor deposition, thermoreactive deposition and diffusion, electrical plating, electroless plating, or their combinations.

    Hardfacing containing tungsten carbide particles with barrier coating and methods of making the same
    7.
    发明授权
    Hardfacing containing tungsten carbide particles with barrier coating and methods of making the same 有权

    公开(公告)号：US10343212B2

    公开(公告)日：2019-07-09

    申请号：US15391251

    申请日：2016-12-27

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: B22F1/02 ,  B23K35/02 ,  C22C19/05 ,  C04B35/56 ,  C04B35/628 ,  C22C14/00 ,  C22C16/00 ,  C22C29/08

    Abstract: A composite composition comprising tungsten carbide particles having a barrier coating and a binder is described, which is used as hardfacing materials. The tungsten carbide particles comprise at least one kind of cast tungsten carbide, carburized tungsten carbide, macro-crystalline tungsten carbide and sintered tungsten carbide. The barrier coating comprises at least one of metal carbides, borides, nitrides, carbonitrides, carboborides, nitroborides and carbonitroborides. The binder alloys take one of the forms selected from a welding/brazing tube, rod, rope, powder, paste, slurry and cloth, which are suitable for being applied by various welding or brazing methods. The barrier coating would prevent or mitigate the degradation of the tungsten carbide particles due to attack of a molten binder alloy during a welding or brazing process.

    Downhole Tools Comprising Degradable Components
    8.
    发明申请
    Downhole Tools Comprising Degradable Components 有权

    公开(公告)号：US20220268119A1

    公开(公告)日：2022-08-25

    申请号：US17185563

    申请日：2021-02-25

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: E21B29/02 ,  C08K3/14 ,  C22C21/00 ,  C22C1/02 ,  C22C1/10

    Abstract: A component of a downhole tool utilized in oil and natural gas exploration and production comprises inorganic hydrolysable compound-containing materials. The inorganic hydrolysable compounds grant the component the degradability/dissolution in aqueous environment. The inorganic hydrolysable compounds include, but not are limited to, hydrolysable carbides, nitrides, and sulfides, such as aluminum carbide (Al4C3), calcium carbide (CaC2), magnesium carbide (Mg2C3 or MgC2), manganese carbide (Mn3C), aluminum nitride (AlN), calcium nitride (Ca3N2), magnesium nitride (Mg3N2), aluminum sulfide (Al2S3), aluminum magnesium carbide (AldMgC2), and aluminum zinc carbide (Al4Zn2C3).

    Polycrystalline Diamond Compact Cutters Having Protective Barrier Coatings
    9.
    发明申请
    Polycrystalline Diamond Compact Cutters Having Protective Barrier Coatings 审中-公开

    公开(公告)号：US20180371845A1

    公开(公告)日：2018-12-27

    申请号：US15978031

    申请日：2018-05-11

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: E21B10/567 ,  C23C14/18

    Abstract: The present disclosure relates to a polycrystalline diamond compact (PDC) cutter with protective barrier coating. The PDC cutter consists of an unleached or leached polycrystalline diamond (PCD) table, a cemented carbide body substrate, and a coating disposed on the cutter. The coating covers at least partially the exterior surfaces of the PCD table of the PDC cutter, and it may also extend over partially or entirely the exterior surfaces of the cemented carbide body. The coating is either a single layer or multilayer. The coating has a thickness of 0.4 μm-100 μm. The coating may have a strong metallurgical bonding with PDC cutter. The coating comprises an oxidation-resistant layer that protects the PDC cutter from thermal and mechanical degeneration during brazing and cutting applications. Methods for preparing such the coating comprise physical vapor deposition, chemical vapor deposition, thermoreactive deposition and diffusion, electrical plating, electroless plating, or their combinations.

    Polycrystalline Diamond Compact Cutters Having Metallic Coatings
    10.
    发明申请
    Polycrystalline Diamond Compact Cutters Having Metallic Coatings 审中-公开

    公开(公告)号：US20180087324A1

    公开(公告)日：2018-03-29

    申请号：US15421082

    申请日：2017-01-31

    Applicant: Wenhui Jiang

    Inventor： Wenhui Jiang

    IPC: E21B10/567 ,  C23C14/18

    CPC classification number: E21B10/567 ,  C23C14/0635 ,  C23C16/32 ,  C23C30/005

    Abstract: Polycrystalline diamond compact cutter with a metallic coating is disclosed. The coating covers the whole exterior surfaces of polycrystalline diamond table and may extend over partially or completely the exterior surfaces of a cemented carbide body substrate. The coating may have a metallurgical bonding with the polycrystalline diamond compact cutter, which is characterized by the formation of a carbide during deposition processes, heat treatments, or brazing operations. The coating may be a single layer or multilayer coating. The coating metallic material adjacent to the polycrystalline diamond compact cutter is the carbide-forming metals selected from Ti, Nb, Zr, V, Ta, Hf, Cr, W, Mo, or the alloys containing any of these metals. The outer layer of a multilayer coating consists of oxidation-resistant metals or alloys. Coating processes utilize physical vapor deposition, chemical vapor deposition, thermoreactive deposition and diffusion, electrolytic plating, electroless plating, any deposition methods, or their combinations.

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