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    EXPERIMENTAL DEVICE AND EXPERIMENTAL METHOD FOR NATURAL GAS HYDRATE SOLID-STATE FLUIDIZED MINING AND CRUSHING
    2.
    发明申请
    EXPERIMENTAL DEVICE AND EXPERIMENTAL METHOD FOR NATURAL GAS HYDRATE SOLID-STATE FLUIDIZED MINING AND CRUSHING 有权

    公开(公告)号：US20210079762A1

    公开(公告)日：2021-03-18

    申请号：US16963715

    申请日：2018-05-21

    Applicant: SouthWest Petroleum University

    Inventor： Guorong WANG ,  Shouwei ZHOU ,  Qingyou LIU ,  Qingping LI ,  Qiang FU ,  Yufa HE ,  Pu YANG ,  Lin ZHONG

    IPC: E21B41/00 ,  E21B43/01

    Abstract: The invention discloses an experimental device for natural gas hydrate solid-state fluidized mining and crushing, the experimental device comprising a power liquid supply module, a hydrate suction module, a pipeline conveying module, a hydrate fluidized crushing module, a secondary processing module and an experimental data information collection and processing module. An experimental method for the experimental device comprises: turning on the power liquid supply module, the hydrate suction module, the pipeline conveying module, the hydrate fluidized crushing module and the secondary processing module, and collecting pressure and flow data at a plurality of locations by the experimental data information collection and processing module. The present invention has the following beneficial effects: a jet solid-state fluidized mining process is simulated, and a plurality of pressure and flow detection points and sampling ports for crushed samples are provided at the same time so as to facilitate parameter collection; a plurality of component parameters are flexibly variable, including changing a drag-back speed of a moving slider, shape parameters of jet nozzles, and a pressure and flow of a power liquid; a spray head is designed to simplify the experimental device, and a dynamic process of jet crushing may be observed from a side surface of an experimental tank.

    DOUBLE-LAYER COILED TUBING DOUBLE-GRADIENT DRILLING SYSTEM
    3.
    发明申请
    DOUBLE-LAYER COILED TUBING DOUBLE-GRADIENT DRILLING SYSTEM 有权

    公开(公告)号：US20230085283A1

    公开(公告)日：2023-03-16

    申请号：US17044125

    申请日：2019-12-23

    Applicant: SOUTHWEST PETROLEUM UNIVERSITY

    Inventor： Guorong WANG ,  Lin ZHONG ,  Qingyou LIU ,  Shouwei ZHOU ,  Xingyong YU ,  Zhong LI ,  Yang TANG ,  Qiang FU ,  Xin HUANG ,  Yanjun LI ,  Hexing LIU

    IPC: E21B7/12 ,  E21B17/01 ,  E21B17/08 ,  E21B33/076

    Abstract: A double-layer coiled tubing double-gradient drilling system, on the basis of conventional drilling equipment, includes a double-layer coiled tubing system, spacer fluid, a downhole lifting pump system, throttling control systems and a data monitoring system. Power fluid enters an annular space of the tubing through an adapter, passes through a downhole lifting pump, enters an inner pipe through a bridge channel, and enters the bottom hole through the drill bit. Return fluid enters an annular channel of the tubing through a recovery hole, then enters the inner pipe through the bridge channel and enters the lifting pump, and then enters a solid control system through the adapter and the control systems in sequence. Gradient control of the bottom hole pressure is realized through monitoring of the spacer fluid and control of the drilling pump unit and throttling control systems. The problem of narrow safe drilling density window is solved.

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