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    PETROLEUM DRILL-STRING SHOCK ABSORBERS
    1.
    发明公开
    PETROLEUM DRILL-STRING SHOCK ABSORBERS 审中-公开

    公开(公告)号：US20230304361A1

    公开(公告)日：2023-09-28

    申请号：US17700555

    申请日：2022-03-22

    Applicant: University of Science and Technology Beijing ,  Shunde Graduate School, University of Science and Technology Beijing

    Inventor： Haiping LIU ,  Qi LV ,  Dashan SHEN ,  Donghang HAN ,  Dongmei ZHU

    IPC: E21B17/07

    CPC classification number: E21B17/076

    Abstract: A petroleum drill-string shock absorber includes a drill collar nipple, a driving unit, an outer shell, a helical guideway, a drill bit base, a woven metal ring and a vibration-absorbing composite beam, the vibration-absorbing composite beam consists of a sheet metal and a flexible material gasket bonded by an adhesive; the drill collar nipple is connected with the helical guideway; the helical guideway is connected with the drill bit base; the driving unit rotates on the helical guideway; the outer shell is connected with the drill bit base; a metal seal ring is configured to seal a space formed between the outer shell and the drill collar nipple, a sealed space is formed among the drill collar nipple, the outer shell and the drill bit base; the woven metal ring is placed between the helical guideway and the drill bit base configured to absorb an axial impact vibration.

    Petroleum drill-string shock absorbers
    2.
    发明授权
    Petroleum drill-string shock absorbers 有权

    公开(公告)号：US12139974B2

    公开(公告)日：2024-11-12

    申请号：US17700555

    申请日：2022-03-22

    Applicant: University of Science and Technology Beijing ,  Shunde Graduate School, University of Science and Technology Beijing

    Inventor： Haiping Liu ,  Qi Lv ,  Dashan Shen ,  Donghang Han ,  Dongmei Zhu

    IPC: E21B17/07

    Abstract: A petroleum drill-string shock absorber includes a drill collar nipple, a driving unit, an outer shell, a helical guideway, a drill bit base, a woven metal ring and a vibration-absorbing composite beam, the vibration-absorbing composite beam consists of a sheet metal and a flexible material gasket bonded by an adhesive; the drill collar nipple is connected with the helical guideway; the helical guideway is connected with the drill bit base; the driving unit rotates on the helical guideway; the outer shell is connected with the drill bit base; a metal seal ring is configured to seal a space formed between the outer shell and the drill collar nipple, a sealed space is formed among the drill collar nipple, the outer shell and the drill bit base; the woven metal ring is placed between the helical guideway and the drill bit base configured to absorb an axial impact vibration.

    METHOD FOR PREPARING DIRECTIONALLY SOLIDIFIED TiAl ALLOY
    4.
    发明申请
    METHOD FOR PREPARING DIRECTIONALLY SOLIDIFIED TiAl ALLOY 有权

    公开(公告)号：US20240401237A1

    公开(公告)日：2024-12-05

    申请号：US18609883

    申请日：2024-03-19

    Applicant: University of Science and Technology Beijing

    Inventor： Yongfeng Liang ,  Fuqiang Zhang ,  Junpin Lin ,  Leming Xu ,  Gang Yang ,  Xianfei Ding

    IPC: C30B29/52 ,  C30B15/10 ,  C30B15/14 ,  C30B15/20 ,  C30B29/66

    Abstract: Disclosed is a method for preparing a directionally solidified TiAl alloy, including: (1) melting and casting a master alloy to obtain a TiAl alloy ingot; (2) processing the TiAl alloy ingot into a sample rod, and placing the sample rod into a refractory metal crucible and then assembling the refractory metal crucible to a directional solidification furnace; (3) vacuumizing the directional solidification furnace, and heating the directional solidification furnace to gradually raise a temperature to exceed a melting point of the sample rod, and conducting heat preservation to melt the sample rod uniformly to obtain a molten TiAl alloy; and (4) directionally pulling the molten TiAl alloy after the heat preservation to allow directional growth to a growth length, stopping the directionally pulling, and taking out an obtained sample to obtain a test rod of the directionally solidified TiAl.

    THIN METAL STRIP CONTINUOUS CASTING METHOD USING MOMENTUM FLOW DISTRIBUTION
    8.
    发明申请
    THIN METAL STRIP CONTINUOUS CASTING METHOD USING MOMENTUM FLOW DISTRIBUTION 有权

    公开(公告)号：US20240367221A1

    公开(公告)日：2024-11-07

    申请号：US18556167

    申请日：2022-07-21

    Applicant: University of Science and Technology Beijing

    Inventor： Cheng Zhou ,  Dongpo Xuan ,  You Zhou ,  Tianliang Jiang ,  Biji Zhu ,  Wenhao Fan ,  Zhihao Zhang ,  Jianxin Xie

    IPC: B22D11/103 ,  B22D11/06

    Abstract: A thin metal strip continuous casting method using momentum flow distribution, comprising the steps of: adjusting the position of a flow distribution device (2), and starting a double-roller thin strip continuous casting apparatus; molten metal (3) forming a uniform sheet-shaped molten metal flow (4) having an initial momentum after the molten metal (3) passes through the flow distribution device; the sheet-shaped molten metal flow entering a molten pool (5) at a superheat degree of 50-100° C. and an initial velocity of 0.5-2 m/s, wherein the flow distribution device is spaced apart from the molten pool; under the action of the initial velocity of the molten metal and in the molten pool, forming a whirlpool, which is adjacent to surfaces of two cooling rollers and has a momentum stirring action; and completing the solidification of the molten metal under the momentum stirring action of the whirlpool along with the rotation of the two cooling rollers. In the method, a whirlpool, which is adjacent to surfaces of cooling rollers and has a momentum stirring action, is formed in a molten pool by means of the kinetic energy of molten metal, such that equiaxed crystals can be prepared when a superheat degree is as high as 50-100° C., and the proportion of equiaxed crystals can be increased to 100%, thereby refining crystal grains and alleviating segregation.

    WIND POWER GENERATION QUANTILE PREDICTION METHOD BASED ON MACHINE MENTAL MODEL AND SELF-ATTENTION
    10.
    发明公开
    WIND POWER GENERATION QUANTILE PREDICTION METHOD BASED ON MACHINE MENTAL MODEL AND SELF-ATTENTION 审中-公开

    公开(公告)号：US20240256829A1

    公开(公告)日：2024-08-01

    申请号：US18243107

    申请日：2023-09-07

    Applicant: University of Science and Technology Beijing

    Inventor： Tianyu HU ,  Huimin MA ,  Xiao ZHANG ,  Hao LIU ,  Kangsheng WANG

    IPC: G06N3/042 ,  G06N3/084

    CPC classification number: G06N3/042 ,  G06N3/084

    Abstract: A wind power generation quantile prediction method based on machine mental model and self-attention includes: using human cognitive decision-making mechanism for reference to construct the machine mental model as the basic framework of WQPMMSA, and then the seasonal power generation rules and intraday power generation trend are encoded into WQPMMSA as the input information of the prediction method, using the self-attention layer to replace the recurrent neural network in the original machine mental model, and establishing the statistical relationship between the seasonal power generation rules and the intraday power generation trend effectively, reducing the long-range forgetting of the original machine mental model-convert the continuous rank probability score in the integral form into a summation form, and using it as a loss function to train WQPMMSA, so that WQPMMSA approaches the optimal quantile prediction result with the highest efficiency. Therefore, accurate quantile prediction of wind power generation is realized.

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