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公开(公告)号：US10408014B1
公开(公告)日：2019-09-10
申请号：US16246860
申请日：2019-01-14
发明人： Baojiang Sun , Xueqing Teng , Yaoming Zhang , Zhiyuan Wang , Hongtao Liu , Jianbo Zhang , Youqiang Liao
IPC分类号： E21B33/138 , E21B47/06
摘要： The well killing device comprises: a first path; a flow regulating device; a pressure detector and a controlling device. The controlling device may control the discharge amount of the killing fluid in different killing stages according to the gas-fluid two-phase flow theory, the pressure of the killing fluid at the wellhead, and the rising speed of the drilling column.
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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：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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公开(公告)号：US20210254438A1
公开(公告)日：2021-08-19
申请号：US16869166
申请日：2020-05-07
申请人： China University of Petroleum (East China) , Selskapet Gudme Stad AS , CIMC Offshore Engineering Research Institute Co. Ltd.
发明人： Baojiang Sun , Ove Tobias Gudmestad , Xuefeng Li , Dahui Liu , Litao Chen
IPC分类号： E21B41/00 , E21B43/30 , E21B43/24 , E21B43/38 , E21B17/01 , E21B43/12 , E21B43/08 , E21B34/06
摘要： The present invention relates to the field of natural gas production, and discloses a well structure for natural gas hydrate production, which comprises: a natural gas production well (12); an injection well (4) capable of extending into a geothermal reservoir and injecting a heat-carrying fluid; a high curvature connecting well (7), the inlet end of the high curvature connecting well (7) is connected to the outlet end of the injection well (4); a hydrate production horizontal well (10), which may be arranged in a shallow hydrate reservoir (9), the high curvature connecting well (7) and the hydrate production horizontal well (10) are connected by an ascending well section (8), and connected with the natural gas production well (12). With the above technical scheme, the high curvature connected well connecting the horizontal well and the vertical well can be located in the bottom layer below the hydrate reservoir, enhancing the stability and production efficiency of the gas hydrate production well.
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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：US10337267B1
公开(公告)日：2019-07-02
申请号：US16122656
申请日：2018-09-05
发明人： Zhiyuan Wang , Shaowei Pan , Baojiang Sun , Jianbo Zhang , Jing Yu
摘要： The invention relates to the field of stratum drilling, and in particular to a control method and a control device for drilling operations. The control method comprises: detecting whether an overflow occurs in a well; controlling the wellhead back pressure based on a preset bottom hole pressure when no overflow occurs in the well, in order to keep the bottom hole pressure stable; and performing a shut-in operation and controlling the wellhead back pressure based on the increase in fluid discharge returned from an annulus of the well when an overflow occurs in the well, so as to keep the bottom hole pressure stable and prevent the gas in the stratum from continuing to invade into the drilling fluid during the process that the overflow drilling fluid is discharged from the bottom of the well. The control method and control device make it possible to prevent drastic fluctuation of the wellhead back pressure caused by the expansion of the invaded gases during the discharge thereof during the drilling operation, thereby realizing the stable control of the wellhead back pressure.
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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：US09624420B1
公开(公告)日：2017-04-18
申请号：US15296908
申请日：2016-10-18
发明人： Chengwen Wang , Ruihe Wang , Baojiang Sun , Weidong Zhou
IPC分类号： C04B7/00 , C04B16/00 , C04B24/00 , C09K8/487 , C04B24/12 , C04B38/10 , C04B24/26 , C04B24/16 , C04B24/18 , B01F17/00 , C04B103/48 , C04B103/40 , C04B103/20 , C04B103/46
CPC分类号： C09K8/487 , C04B24/124 , C04B24/166 , C04B24/18 , C04B24/2623 , C04B28/02 , C04B38/10 , C04B40/0039 , C04B2103/20 , C04B2103/408 , C04B2103/46 , C04B2103/48 , C09K8/473 , C04B22/12 , C04B24/10 , C04B24/121 , C04B24/123
摘要： The present invention relates to the field of oil and natural gas well cementation engineering, in particular to a foam stabilizer composition, foamed cement slurry and an additive composition thereof. The foam stabilizer composition comprises C6-C20 alkyl amido alkyl amine oxide, C6-C20 alkyl amido alkyl betaine, and triterpenoid saponin compound. The foam stabilizer composition provided in the present invention is helpful for forming foamed cement slurry that has high foam stability, and the foam stabilizer composition can work with other active components in the foamed slurry additive composition provided in the present invention to enable the foamed cement slurry that contains the additive composition to obtain low density, high foam stability, low permeability, and high compressive strength, which is especially applicable to well cementing operation in an oil and natural gas exploration and development process.
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