检索结果-南通市图书馆

Mechanical Modeling and Analysis of Stability Deterioration of Production Well During Marine Hydrate Depressurization Production

引用

China Ocean Engineering 2024年第2期38卷 338-351页

作者： SUN Huan-zhao CHANG Yuan-jiang SUN Bao-jiang WANG Kang chen guo-ming LI Hao DAI Yong-guo Centre for Offshore Engineering and Safety Technology China University of Petroleum(East China)Qingdao 266580China School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China Jiangsu Shuguang Oil Tools Co. LtdTaizhou 225532China

Different from oil and gas production,hydrate reservoirs are shallow and unconsolidated,whose mechanical properties deteriorate with hydrate ***,the formations will undergo significant subsidence during depressurization,which will destroy the original force state of the production ***,existing research on the stability of oil and gas production wells assumes the formation to be stable,and lacks consideration of the force exerted on the hydrate production well by formation subsidence caused by hydrate decomposition during *** fill this gap,this paper proposes an analytical method for the dynamic evolution of the stability of hydrate production well considering the effects of hydrate *** on the mechanical model of the production well,the basis for stability analysis has been proposed.A multi-field coupling model of the force state of the production well considering the effect of hydrate decomposition and formation subsidence is established,and a solver is *** analytical approach is verified by its good agreement with the results from the numerical method.A case study found that the decomposition of hydrate will increase the pulling-down force and reduce the supporting force,which is the main reason for the stability *** higher the initial hydrate saturation,the larger the reservoir thickness,and the lower the production pressure,the worse the stability or even *** work can provide a theoretical reference for the stability maintaining of the production well.

关键词： natural gas hydrate production well depressurization production formation deformation stability deterioration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Numerical Investigation on Dynamic Characteristics of Casing Deformation During Marine Hydrate Production

引用

China Ocean Engineering 2022年第4期36卷 638-648页

作者： CHANG Yuan-jiang WANG Kang chen guo-ming SUN Bao-jiang SUN Huan-zhao JI Miao-miao Centre for Offshore Engineering and Safety Technology(COEST) China University of Petroleum(East China)Qingdao 266580China College of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China

Formation subsidence is inevitable during marine hydrate decomposition,and the consequent casing deformation seriously threatens the security of sustainable hydrate *** to insufficient observed data of formation subsidence in field,displacement boundary condition of casing is *** the conventional static methods are inapplicable for the calculation of casing deformation in hydrate production *** present work aims at proposing an approach to investigate dynamic deformation of the casing during hydrate *** the proposed methodology,based on the movement theory of hydrate decomposition front,hydrate decomposition process can be simulated,in which hydrate reservoir strength formation subsidence showed time-dependent *** considering the actual interactions among casing,cement and formation,three models of hydrate production well are developed to reveal the static and dynamic deformation mechanisms of the *** application of the proposed methodology is demonstrated through a case *** show that buckling deformation and bending deformation of casing reduce the passing ability of downhole tools in deformed casing by 4.2%and 7.5%,*** the progress of hydrate production,buckling deformation will increase obviously,while a little increase of bending deformation will occur,as the formation slippage induced by formation inclination is much larger than that caused by hydrate *** proposed approach can provide theoretical reference for improving casing integrity of marine hydrate production.

关键词： hydrate production casing deformation dynamic characteristics formation inclination

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dynamic Analysis of A Deepwater Drilling Riser with A New Hang-off System

引用

China Ocean Engineering 2024年第1期38卷 29-41页

作者： LI Yan-wei LIU Xiu-quan WANG Jin-long chen guo-ming CHANG Yuan-jiang SHENG Lei-xiang Centre for Offshore Engineering and Safety Technology China University of PetroleumQingdao 266580China National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of PetroleumQingdao 266580China China CNOOC Research Institute Co. Ltd.Beijing 100028China

The safety of risers in hang-off states is a vital challenge in offshore oil and gas engineering.A new hang-off system installed on top of risers is proposed for improving the security of *** approach leads to a challenging problem:coupling the dynamics of risers with a new hang-off system combined with multiple structures and complex *** accurately analyze the dynamic responses of the coupled system,a coupled dynamic model is established based on the Euler-Bernoulli beam-column theory and penalty function method.A comprehensive analysis method is proposed for coupled dynamic analysis by combining the finite element method and the Newmarkβ*** analysis program is also developed in MATLAB for dynamic *** simulation results show that the dynamic performances of the risers at the top part are significantly improved by the new hang-off system,especially the novel design,which includes the centralizer and articulation *** bending moment and lateral deformation of the risers at the top part decrease,while the hang-off joint experiences a great bending moment at the bottom of the lateral restraint area which requires particular attention in design and *** platform navigation speed range under the safety limits of risers expands with the new hang-off system in use.

关键词： deepwater drilling riser new hang-off system dynamic analysis finite element method penalty function method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabricating Master with Reactive Ion Beam Etching Method

引用

Chinese Physics Letters 1998年第7期15卷 495-497页

作者： ZOU Zhi-qiang FANG Hong-li FU Xin-ding chen guo-ming Shanghai Institute of Metallurgy Chinese Academy of SciencesShanghai 200050

The fabrication process of glass master or glass etching optical disk using reactive ion beam(RIB)etching method was *** was applied for image *** etching using CF4 gas transferred the pregrooves into the glass *** shape and depth of the pregrooves in the glass is a function of the RIB etcher settings.A glass substrate ofФ130mm with etched pregrooves(track pitch was 1.6μm and groove depth 0.1μm)was obtained,showing that a glass master or glass etching disc can be fabricated by this technique.

关键词： technique glass Master

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Axial Vibration Analysis of the Mud Recovery Line on Deepwater Riserless Mud Recovery Drilling System

引用

China Ocean Engineering 2014年第3期28卷 381-390页

作者：王国栋陈国明许亮斌殷志明 Centre for Offshore Engineering and Safety Technology China University of Petroleum CNOOC Research Institute

The series connection of multistage pumping module is the common concept of deepwater riserless mud recovery drilling system. In this system, the influence of the mass of pumping module on the vibration of mud recovery line cannot be ignored, and the lumped mass method has been utilized to discretize the mud recovery line. Based on the analysis of different boundary conditions, the paper establishes the axial forced vibration model of the mud recovery line considering the seawater damping, and the vibration model analysis provides the universal solution to the vibration model. An example of the two-stage pumping system has been used to analyze the dynamic response of mud recovery line under different excited frequencies. This paper has the important directive significance for the application of riserless mud recovery drilling technology in deepwater surface drilling.

关键词： riserless mud recovery drilling lumped mass method mud recovery line axial vibration analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Dynamic-Bayesian-Networks-Based Resilience Assessment Approach of Structure Systems: Subsea Oil and Gas Pipelines as A Case Study

引用

China Ocean Engineering 2020年第5期34卷 597-607页

作者： CAI Bao-ping ZHANG Yan-ping YUAN Xiao-bing GAO Chun-tan LIU Yong-hong chen guo-ming LIU Zeng-kai JI Ren-jie National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of PetroleumQingdao 266580China College of Mechanical and Electronic Engineering China University of PetroleumQingdao 266580China

Under unanticipated natural disasters, any failure of structure components may cause the crash of an entire structure system. Resilience is an important metric for the structure system. Although many resilience metrics and assessment approaches are proposed for engineering system, they are not suitable for complex structure systems, since the failure mechanisms of them are different under the influences of natural disasters. This paper proposes a novel resilience assessment metric for structure system from a macroscopic perspective, named structure resilience, and develops a corresponding assessment approach based on remaining useful life of key components. Dynamic Bayesian networks(DBNs) and Markov are applied to establish the resilience assessment model. In the degradation process, natural degradation and accelerated degradation are modelled by using Bayesian networks, and then coupled by using DBNs. In the recovery process, the model is established by combining Markov and DBNs. Subsea oil and gas pipelines are adopted to demonstrate the application of the proposed structure metric and assessment approach.

关键词： structure resilience structure system remaining useful life dynamic Bayesian networks

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Extraction of the Structure Functions in τ→3πv Decay Using Li Model

引用

Chinese Physics Letters 1998年第12期15卷 868-870页

作者： XIONG Zhao-hua chen guo-ming chen He-sheng Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039

The structure functions in theτ→3πv decay are extracted using the model proposed by *** predictions of Li model are compared with KS ones and the data from OPAL *** is found that predictions by the model forωA(Q2)are consistent with the data except for in the high energy region(Q2>1.2 GeV2),andωC,ωD,ωE normalized toωA are in reasonable agreement with the experimental *** factors to the Breit-Wigner distribution of a1 and the Lagrangian of this decay are proposed to the model.

关键词： experiment. decay model.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study of the learner-centered interactive teaching model in the EFL classroom

引用

Sino-US English Teaching 2008年第5期5卷 15-18页

作者： JIN guo-chen WANG ming-li College of Foreign Languages Daqing Petroleum Institute Daqing 163318 China

With the change of the teaching approach, people have realized that language is not only knowledge, but also a skill and ability. Today＇s English teaching should emphasize the college student＇s English comprehensive skills. This paper is intended to introduce the traditional English teaching method, and by using the comparison of the force-feeding mode of English teaching with interactive approach to language pedagogy. It emphasizes the analysis of the modem communicative teaching mode, and it also elaborates the English teacher＇s role in interactive class, and proves the effectivity and feasibility of the theory based on the student-centered mode.

关键词： teacher's roles interactive approach learner-centered interactive teaching class

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

考虑多失效模式老龄平台结构可靠性分析

引用

中国石油大学学报（自然科学版） 2010年第4期34卷 107-112页

作者：林红陈国明中国石油大学机电工程学院山东东营257061

针对老龄平台结构存在的多种退化失效因素,综合考虑疲劳失效、腐蚀失效和静强度失效这3种失效模式,建立每种失效模式的可靠度模型,并相应给出可靠度计算方法。通过相关系数研究任意两种失效模式之间的相互影响,进而提出两种计算3种退化... 详细信息

针对老龄平台结构存在的多种退化失效因素,综合考虑疲劳失效、腐蚀失效和静强度失效这3种失效模式,建立每种失效模式的可靠度模型,并相应给出可靠度计算方法。通过相关系数研究任意两种失效模式之间的相互影响,进而提出两种计算3种退化失效模式全耦合作用下可靠度的方法:一是根据***窄界限理论计算可靠度指标上、下限,二是通过将疲劳裂纹扩展和腐蚀退化引起的总抗力衰减引入静强度退化失效模型中,得到3种失效模式的耦合失效概率。实际算例结果表明:在不同服役阶段构件具有不同的主导失效模式;任意两种失效模式的耦合可靠度均低于单一失效模式的可靠度,3种失效模式耦合可靠度最低。

关键词：多失效模式相关系数可靠性分析 O.Detlevsen窄界限理论老龄平台

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Single W Boson Production at s=189 GeV

引用

Chinese Physics Letters 2000年第4期17卷 258-260页

作者： YANG Hai-Jun chen guo-ming YANG Min XIONG Zhao-Hua LU Liang LU Yu-Sheng chen He-Sheng TANG Xiao-Wei Martin Pohl JIN Bing-Nian Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039 Swiss Federal Institute of Technology ZurichSwitzerland

Single W boson production is analyzed in a data sample collected by L3 detector at Large Electron Positron Collider in *** integrated luminosity is 176.4pb^(-1)with center-of-mass energy at√s=*** signal consists of large missing energy final states with a single energetic lepton or two hadronic *** total cross section of single W production is measured to be 0.58±0.13±0.04 pb,in good agreement with standard model *** this measurement,the limits on the anomalousγWW triple-gauge-boson couplings are derived at 95%confidence level:-0.48<△_(kr)<0.38 and-0.50<λ_(γ)<0.41.

关键词： boson gauge coupling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：