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公开(公告)号:US10267129B1
公开(公告)日:2019-04-23
申请号:US16058623
申请日:2018-08-08
发明人: Baojiang Sun , Ye Chen , Zhiyuan Wang , Litao Chen , Yonghai Gao , Jiafang Xu , Heen Zhang
摘要: The present invention relates to the field of marine hydrate reserve recovery technology, and discloses a homocentric squares-shaped well structure for marine hydrate reserve recovery utilizing geothermal heat and a method thereof. The present invention employs a homocentric squares-shaped well structure and utilizes heat-carrying fluid to transfer the energy in a geothermal reservoir to a hydrate reservoir to promote dissociation of natural gas hydrates. The homocentric squares-shaped well structure can realize cyclic utilization of the heat-carrying fluid while improving heat conduction efficiency, and has advantages including high recovery rate, low recovery cost, low energy loss, and high heat utilization efficiency, etc.
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公开(公告)号:US09598936B1
公开(公告)日:2017-03-21
申请号:US15270571
申请日:2016-09-20
发明人: Yonghai Gao , Ye Chen , Baojiang Sun , Wenchao Sun , Hao Li
IPC分类号: G01N33/24 , E21B41/00 , E21B43/34 , E21B47/06 , G01N33/22 , E21B43/24 , E21B43/16 , E21B21/00
CPC分类号: G01N33/225
摘要: The present invention relates to an apparatus and a method for monitoring a hydrate decomposition area under different drilling and production processes. The apparatus for monitoring hydrate decomposition area under different drilling and production processes comprises a reaction unit, an auxiliary unit and a determination unit; the reaction unit is used to simulate the hydrate storage layer environment, provide a place for generation and decomposition of a hydrate, simulate a hydrate heat-injection exploitation process, a hydrate pressure-reduction exploitation process and a hydrate CO2 displacement exploitation process, and also analyze the hydrate decomposition status at various areas by calculating the hydrate decomposition rate, thereby evaluating and optimizing the drilling and production process; the auxiliary unit is used to provide a gas source and a liquid source for the reaction unit, and simulate different hydrate drilling and production processes; and the determination unit is used to measure the hydrate decomposition rate in different drilling and production processes.
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公开(公告)号:US20170089161A1
公开(公告)日:2017-03-30
申请号:US15270537
申请日:2016-09-20
发明人: Baojiang Sun , Ning Zhang , Hao Li , Yonghai Gao , Guomin Yan , Mingzhao Huang , Shuang Xu
IPC分类号: E21B33/038 , E21B19/00 , E21B7/12
CPC分类号: E21B23/02 , E21B7/20 , E21B33/035 , E21B43/101
摘要: The present invention relates to offshore oil and gas exploration drilling field and, in particular, to a surface layer conductor running tool for deep-water well drilling, which is used to run a conductor to a designated position, so that the drill stem can be released and the drilling can be continued. The surface layer conductor running tool for deep-water well drilling comprises a mandrel, an inner sleeve, an outer sleeve, and a main body, wherein the inner sleeve, the outer sleeve, and the main body are fitted over the mandrel sequentially; the inner sleeve can slide up and down but cannot rotate in relation to the mandrel, the outer sleeve and the inner sleeve are connected via a transmission thread pair, and the main body is situated on the inner sleeve; a retaining pawl penetrating the main body and radially slidable in horizontal direction; and an anti-rotation pin penetrating the main body and the outer sleeve, so that the outer sleeve can move up and down in the main body only, but cannot rotate.
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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:US09631454B1
公开(公告)日:2017-04-25
申请号:US15292992
申请日:2016-10-13
发明人: Baojiang Sun , Xuerui Wang , Yingwen Ma , Yonghai Gao
CPC分类号: E21B33/146 , E21B33/138 , E21B47/06
摘要: The present invention provides wellbore pressure control system and method for well cementation stages, and relates to the offshore oil and gas exploitation field. The wellbore pressure control system comprises: an injection pump; and a control device, configured to control the injection pump to inject a fluid or gas through an injection pipeline to a return pipeline that communicates with an annular space of the wellbore to decrease the pressure in the return pipeline and thereby decrease the pressure in the annular space, wherein, the density of the fluid or gas is lower than the density of a drilling fluid in the annular space. The technical scheme of the present invention can effectively prevent leaky zones from being fractured by high-density cement slurry in the well cementation process that may cause safety accidents such as well kick and well blowout, etc.
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公开(公告)号:US09631450B2
公开(公告)日:2017-04-25
申请号:US15270537
申请日:2016-09-20
发明人: Baojiang Sun , Ning Zhang , Hao Li , Yonghai Gao , Guomin Yan , Mingzhao Huang , Shuang Xu
IPC分类号: E21B7/12 , E21B33/038 , E21B19/00
CPC分类号: E21B23/02 , E21B7/20 , E21B33/035 , E21B43/101
摘要: The present invention relates to offshore oil and gas exploration drilling field and, in particular, to a surface layer conductor running tool for deep-water well drilling, which is used to run a conductor to a designated position, so that the drill stem can be released and the drilling can be continued. The surface layer conductor running tool for deep-water well drilling comprises a mandrel, an inner sleeve, an outer sleeve, and a main body, wherein the inner sleeve, the outer sleeve, and the main body are fitted over the mandrel sequentially; the inner sleeve can slide up and down but cannot rotate in relation to the mandrel, the outer sleeve and the inner sleeve are connected via a transmission thread pair, and the main body is situated on the inner sleeve; a retaining pawl penetrating the main body and radially slidable in horizontal direction; and an anti-rotation pin penetrating the main body and the outer sleeve, so that the outer sleeve can move up and down in the main body only, but cannot rotate.
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