海上无人平台悬挂式巡检机器人行走机构设计与性能分析

针对海上无人值守平台智能化巡检的现实需求,设计一种悬挂式机器人行走机构,并对行走机构的驱动轮机构、承重轮机构、压紧轮机构、导向轮机构、防抖轮机构进行整体设计和性能分析。结合机器人本体及检测、算法系统,所设计的行走机构可用于海上无人平台日常巡检。     

海上传统无人平台生产现状与前景展望

随着海上边际油田的加速开发，无人平台建设投入少，操作成本和人力成本低，海上无人平台的油气开采将会成为未来一段时间内海上油气生产的重要模式。但由于无人值守的特殊性，传统无人平台在日常生产维护中暴露出部分管理难题，主要集中在腐蚀管理、应急处置、远程操控三个方面。针对海上无人平台生产现状梳理和总结，为今后无人平台的发展管理提供参考意见，适当采取防腐涂层、阴极保护和外加电流保护等方式作为无人平台的防腐蚀措施。无人平台的应急处置要从平台复产、紧急压井两个方面着手。无人值守平台基于自动化技术、视频监控技术、远程操控技术、应急保障技术以及大胆应用5G技术来实现远程监控与操作。     

防登临和溢油监控系统在海上油田的综合应用

随着边际油田开发力度的增加,无人平台已成为一种低成本、见效快的开发趋势,随之而来的就是无人平台安防管控问题,由于传统的视频监控系统已无法有效地对无人平台周边海域船只和人员监控,建立一套可实现对登临船舶和人员预警及识别的智能监控系统、同时融合多个已安装的视频监控系统迫在眉睫,可提高人员的工作效率和资源利用空间,进而实现对海上无人平台监控融合和管理。在传统无人平台安防生产的实践总结基础上,建立了一套防止外来船舶和人员登临监控系统,同时对多个监控装置进行整合管理,提升了海上油田监控效率,保证了海上生产平台的平稳安全运行。     

海上井喷失控井口应急回接装置设计探讨

井口重建是井喷失控事故应急处置过程中的关键环节.为快速高效开展海上井喷重建井口作业,设计了一种井口应急回接装置,不仅适用于水上、水下井口井喷失控事故的应急抢险,还能运用于陆地井口.该套装置及技术适用于多种尺寸套管,承压等级高,密封性能好,抗高温,具有针对性强、操作简便、安全可靠等特点,可大幅提高海上油气井井喷失控事故应...     

水面无人艇危险规避方法

设计了一种符合国际海上航行规则的相对坐标系下动态规避方法,以处理水面无人艇的危险规避问题.根据国际海上航行规则将碰撞局面划分为追越、交叉相遇、正面相遇3种局面.计算相对坐标系下相对速度的改变量,并通过改变无人艇的航速和航向,完成对障碍物的危险规避.搭建了无人艇半实物仿真试验平台,以方便快捷地验证危险规避系统的可行性和可靠性.大量半实物仿真试验结果表明,基于所设计的无人艇危险规避方法可以有效地完成静止或运动障碍物的危险规避任务,规避航线合理,满足无人艇规避系统的要求.     

海上无人平台基座式起重机远程操控系统的研究与应用

为进一步提高海上无人平台管理效率及人员登临的便利性，通过对其起重机远程操控系统的研究，开发形成了一套完整的技术方案，并成功应用于渤海油田。经现场应用验证，该系统能够有效提高海上无人平台人员及物资交换的效率，切实降低了人力负荷。     

千吨级采修一体化平台上部组块整体化建造技术

KD48平台位于胜利油田垦东区块,是一座修井模块固定式采修一体化平台,平台分两层设置,主体平台底层是生产平台,顶层为修井作业平台,主体平台两侧外挂9井式井口平台各一个,总重量约1200吨。本文着重介绍平台上部组块的陆上整体预制,装船,海上就位安装的施工方案和技术措施。通过此项目的实施,证明运用整体化建造技术建造海上大型采修一体化平台,可缩短海上安装时间,降低施工风险,能更有效的保证建造质量。     

渤海油田无人平台批量修井敏感性研究

随着渤海油田开发进程的不断推进,海上无人平台数量增加.目前渤海无人平台动管柱修井作业主要依靠自升式钻井平台.由于自升式钻井平台动复员费用高,长期以来无人平台的动管柱修井作业大多采用批量修井作业方式.在分析批量修井造成的原油产量损失以及自升式钻井平台的修井费用的基础上,提出无人平台批量修井敏感性分析的方法:通过对油田修井...     

海上油气井油层套管井口装定载荷设计

综合考虑钻完井和投产采气过程未固井段套管强度和稳定性问题,提出一种海上油气井油层套管井口装定载荷设计方法,建立多层管柱耦合系统计算力学模型,确定钻完井过程套管轴向载荷计算方法,综合考虑温度场、压力场和压力端部效应给出投产采气后套管轴向载荷计算公式,并以中国南海某气田为例进行油层套管井口装定载荷设计。结果表明:套管强度不是限制海上油气井油层套管井口装定载荷设计的因素,投产采气过程底部油层套管的稳定性是油层套管井口装定载荷设计的重要因素;当设计极值产气量小于特定值时,油层套管井口装定载荷为油层套管未固井段重力,当设计极值产气量大于特定值时,随着设计极值产气量的增大,油层套管井口装定载荷增大,但增大的幅值逐渐减小。     

平台泄漏隐患分析及其对策研究

海洋石油开发环境的恶劣、多雨、潮湿、盐雾等因素容易造成管线的提前老化腐蚀,再者海洋井口平台工艺设计结构紧凑,又多不具备在线腐蚀监测以及泄漏应急系统,其泄漏极易威胁海洋环境。本文针对目前海上平台管线老化严重,油水泄漏频繁的潜在隐患增加这个多发状态,对各类泄漏事件进行对比分析,并且进行有针对原因分析,在此基础上提出了相应的建议与措施。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that