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    DYNAMIC CRACK LEAKING STOPPAGE EVALUATION EXPERIMENT DEVICE AND EXPERIMENT METHOD
    42.
    发明公开
    DYNAMIC CRACK LEAKING STOPPAGE EVALUATION EXPERIMENT DEVICE AND EXPERIMENT METHOD 审中-公开

    公开(公告)号：US20230141812A1

    公开(公告)日：2023-05-11

    申请号：US17777594

    申请日：2020-11-25

    Applicant: China University of Petroleum-Beijing

    Inventor： Chengyun MA ,  Yongcun FENG ,  Jingen DENG

    IPC: G01N3/12 ,  E21B49/00 ,  G01N33/24

    CPC classification number: G01N3/12 ,  E21B49/00 ,  G01N33/24

    Abstract: A dynamic crack leaking stoppage evaluation experiment device includes a crack simulation experiment instrument having a dynamic crack simulation mechanism. The dynamic crack leaking stoppage evaluation experiment device can simulate a dynamic change process of a crack from a closed state to an open state. An experiment method can be applied to study a variation range of the width of the crack that have been subjected to self-adaptive leaking stoppage with various combinations of leaking stoppage materials and under different increments, and the method can also be applied to quantitatively study on effecting patterns of rheological parameters and hydraulic parameters of well drilling fluid on stability of a leaking stoppage layer in the dynamic crack, so that enabled is not only simulation of leaking stoppage process of a dynamic crack, but also real-time monitoring and evaluation on leaking stoppage effect and leaking stoppage location inside the dynamic crack.

    Shale oil fracturing synchronous energizing simulation experimental device and method
    44.
    发明授权
    Shale oil fracturing synchronous energizing simulation experimental device and method 有权

    公开(公告)号：US11624273B2

    公开(公告)日：2023-04-11

    申请号：US17654546

    申请日：2022-03-11

    Applicant: China University of Petroleum (East China)

    Inventor： Sen Wang ,  Qihong Feng ,  Yichun Wang ,  Xianmin Zhang ,  Jiyuan Zhang ,  Xian Shi

    IPC: G01N33/24 ,  E21B43/26 ,  E21B47/06 ,  E21B49/08

    Abstract: The present disclosure relates to the technical field of oil-gas field development, and discloses a shale oil fracturing synchronous energizing simulation experimental device and method. The shale oil fracturing synchronous energizing simulation experimental device comprises a liquid supply system, a confining pressure loading system, a fracturing system, an energizing system and a recovery system, wherein the liquid supply system is used for storing fluid and can inject the fluid into the fracturing system; the fracturing system can bear a test piece, receive the fluid injected by the liquid supply system and serve as seepage space of the fluid; the confining pressure loading system is used for providing simulated confining pressure for the test piece; the energizing system is used for simulating an energizing effect on a test piece after fracturing liquid is injected; and the recovery system is used for collecting discharged liquid and separating and metering the discharged liquid.

    DESIGN METHOD OF CEMENT FOR WELL CEMENTING IN PENETRATED HYDRATE LAYER
    45.
    发明申请
    DESIGN METHOD OF CEMENT FOR WELL CEMENTING IN PENETRATED HYDRATE LAYER 有权

    公开(公告)号：US20230091934A1

    公开(公告)日：2023-03-23

    申请号：US17994420

    申请日：2022-11-28

    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

    Inventor： Yuhuan BU ,  Shengda SHEN ,  Chang LU ,  Huajie LIU ,  Shenglai GUO ,  Xun SHAN ,  Rui MA

    IPC: G01N25/18 ,  E21B33/14 ,  E21B49/02 ,  G01N33/38

    Abstract: A performance evaluation device and a design method of a cement for well cementing in a penetrated hydrate layer are provided. The performance evaluation device includes an equivalent wellbore, an inner circulation system, an outer circulation system, a thermal insulation cover, a bracket, a temperature sensing system, and a cement mold. The device can simulate a true downhole situation, conduct an evaluation experiment on the heat insulation performance of a cementing cement, and conduct experiments at different temperatures with automatic temperature control. The design method is to use a low-hydration, early-strength, and heat-insulating cement slurry system during the well cementing in a penetrated hydrate layer, where the low-hydration and early-strength characteristics ensure the effective sealing of a hydrate layer during a cementing process, and the heat insulation characteristic results in low heat conductivity and thus can ensure the stability of a hydrate layer during a production operation.

    Efficient and intelligent steering drilling system and drilling method
    46.
    发明授权
    Efficient and intelligent steering drilling system and drilling method 有权

    公开(公告)号：US11591896B2

    公开(公告)日：2023-02-28

    申请号：US17777111

    申请日：2021-03-09

    Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

    Inventor： Yongwang Liu

    IPC: E21B17/10 ,  E21B47/022 ,  E21B7/00 ,  E21B44/00 ,  E21B7/06

    Abstract: A high efficiency smart steering drilling system includes a smart push force application tool and a centralizer. The centralizer is at an end close to a drill bit. The smart push force application tool is at an end away from the drill bit and includes a push force application wing rib having a telescoping function. The smart push force application tool is capable of automatically measuring an inclination angle and an azimuth angle and comparing the inclination angle and the azimuth angle with design values so as to control the push force application wing rib to output a push force in a telescopic manner based on a difference between the measured values and the design values and applying a push force to the drill bit. The drilling system achieves combined deflection under double action of drill bit push and pointing, greatly improving the deflection capability.

    SEISMIC IMAGING METHOD, SYSTEM, AND DEVICE BASED ON PRE-STACK HIGH-ANGLE FAST FOURIER TRANSFORM
    47.
    发明申请
    SEISMIC IMAGING METHOD, SYSTEM, AND DEVICE BASED ON PRE-STACK HIGH-ANGLE FAST FOURIER TRANSFORM 有权

    公开(公告)号：US20230034829A1

    公开(公告)日：2023-02-02

    申请号：US17958054

    申请日：2022-09-30

    Applicant: China University of Petroleum (EAST CHINA)

    Inventor： Liyun FU ,  Qingqing LI ,  Qizhen DU ,  Zhiwei WANG

    IPC: G01V1/28 ,  G01V1/36

    Abstract: This disclosure relates to geophysical exploration and seismic imaging, and more particularly to a seismic imaging method, system, and device based on pre-stack high-angle fast Fourier transform (FFT). The method includes: acquiring seismic data acquired during seismic exploration; extracting a common shot point gather from the seismic data followed by conversion into a frequency wavenumber domain common offset gather; calculating wave propagation angles; dividing an imaging region into a first region and a second region; solving constant coefficients of the first region and the second region; performing frequency-division layer-by-layer wavefield continuation on a frequency-wave number domain common offset gather to obtain imaging results at different depths and frequencies; subjecting the imaging results to integration followed by transformation to a spatial domain to obtain common offset imaging profiles; and subjecting the common offset imaging profiles to superposition obtain final imaging results.

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