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公开(公告)号:US11203922B1
公开(公告)日:2021-12-21
申请号:US17206386
申请日:2021-03-19
发明人: Baojiang Sun , Zhiyuan Wang , Shujie Liu , Yonghai Gao , Baitao Fan , Hao Li , Shen Guan , Haikang He , Bangtang Yin , Xiaohui Sun , Xuerui Wang
IPC分类号: E21B43/12 , E21B21/08 , E21B21/00 , F04B49/06 , F04B49/22 , E21B33/035 , E21B34/02 , E21B34/04 , E21B47/06
摘要: The present invention provides a method and equipment for optimizing hydraulic parameters of deepwater managed pressure drilling in real time. The method comprises: acquiring overflow parameters in the current drilling process, performing preprocessing and feature extraction on the overflow parameters, and inputting the overflow parameters into trained support vector machine identification models for overflow judgment. If overflow occurs at the current drilling depth, reducing an opening of a throttle valve and increasing a displacement of a submarine pump, measuring a wellhead back pressure and calculating a bottom hole pressure, and judging whether overflow continues is performed. If overflow continues, mixing high-density drilling fluid with the original drilling fluid, pumping the mixture into a wellbore annulus, and performing the above operations of reducing the throttle valve opening, increasing the displacement of the submarine pump, calculating the bottom hole pressure and judging whether overflow continues is performed until overflow no longer occurs.
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公开(公告)号:US09631444B1
公开(公告)日:2017-04-25
申请号:US15298041
申请日:2016-10-19
发明人: Baojiang Sun , Xiaohui Sun , Zhiyuan Wang , Jianliang Zhou
摘要: The present invention provides a measuring unit, a kick information identification apparatus and method, and relates to the oil and gas well engineering field. The measuring unit comprises: a throttling device, mounted on a drill stem; sensors, arranged at the two sides of the throttling device, and configured to sense the pressure and/or temperature at the two sides of the throttling device; and a signal transmitter, configured to transmit the pressure and/or temperature values. The present invention employs a throttling device and measures the pressure drop and/or temperature difference across the throttling device, and can identify kick information successfully according to the pressure drop and/or temperature difference. Even in the case of horizontal wells where the flow and pressure variations are not apparent, the present invention can still attain a good kick information identification effect.
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公开(公告)号:US11002126B2
公开(公告)日:2021-05-11
申请号:US17110354
申请日:2020-12-03
发明人: Zhiyuan Wang , Jianbo Zhang , Baojiang Sun , Wenqiang Lou , Xiaohui Sun , Zheng Liu , Shikun Tong
IPC分类号: E21B44/06 , E21B41/00 , E21B47/008 , E21B47/07 , E21B47/08 , E21B47/047
摘要: An active control method and system for wellbore pressure in open-cycle drilling in marine natural gas hydrates. The system comprises a drilling system, a drilling fluid injection system, and a data processing system for conducting the drilling operation.
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