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An Overview of Deepwater Pipeline Laying Technology

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China Ocean Engineering 2008年第3期22卷 521-532页

作者：李志刚王琮何宁赵冬岩 China Offshore oil Engineering co. Ltd.

The technology and methods involved in pipeline laying in shallow water have evolved to the level of routine and co.monplace. However, regarding the unexpected deepwater co.plexity, the traditional pipeline laying techniques have to co.front many new challenges arisen from the increase of the water depth, diameter of the pipe and the welding difficuhy, all of which should be modified and/or innovated based on the existed mature experiences. The purpose of this investigation is to outline the existing and new engineering laying techniques and the associated facilities, which can provide some significant information to the related research. In the co.text, the latest deepwater pipeline laying technology and pipe laying barges of the renowned co.panies from Switzerland, Norway, Italy etc., are introduced and the co.responding co.parison and discussion are presented as well.

关键词： deepwater pipeline pipeline installation method pipe laying barge/vessel

Standardization of New Sliver Probe for co.ling Power Test of Polymer Quenchant

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材料热处理学报 2004年第5期25卷 447-452页

作者： Hideo YOKOTA Katsumi ICHITANI Kazuyoshi YAMAMOTO Hiroyuki IKUMI Yasufumi SUGIURA Michiharu NARAZAKI Nippon oil co.poration Yokohama JapanIdemitsu Kosan Co. Ltd. Chiba JapanDaido Chemical Industry Co. Ltd. Osaka JapanSanshin Kagaku Kogyo Co. Ltd. Tokyo JapanNippon Grease Co. Ltd. Osaka JapanUtsunomiya University Utsunomiya Japan

Technical co.mittee for Japanese industrial standard of heat treating oils has studied on the new method for testing co.ling power of aqueous quenchants. This method employed the co.ling curve test of a new sliver rod probe, which has a metal-sheathed thermoco.ple at its geometrical center. The experimental study has clarified that this probe has the higher sensitivity and excellent durability. In order to standardize this probe for co.ling power test of aqueous quenchants, the repeatability and reproducibility of test results etc. have been studied. D.O.P. (Di-2-ethylthexyl Phthalate) was used as reference quenching fluid for initial calibration and for periodic calibration verification of the probe and system. In addition, 10% brine was used to check the response capability of the probe and system to the sudden change of temperature. These procedures are established acco.ding to the experimental investigation. This new test method is going to be built in the revised version of JIS K 2242 "Heat treating oils" as the co.ling power test method for aqueous quenchants.

关键词：聚合物淬火剂冷却动力试验冷却曲线银探测器

Moment Redistribution Effect of the co.tinuous Glass Fiber Reinforced Polymer-co.crete co.posite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen Bo-Cheng Li De-Cheng Cai Yang-Yang Du Hui Huang Offshore oil Engineering co.ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in co.tinuous glass fiber reinforced polymer(GFRP)-co.crete co.posite slabs caused by co.crete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was co.ducted on co.tinuous GFRP-co.crete co.posite slabs,and a calculation method based on the co.jugate beam method was *** co.posite slabs were formed by co.bining GFRP profiles with a co.crete layer and supported on steel beams to create two-span co.tinuous co.posite slab *** methods,epoxy resin bonding,and stud co.nection,were used to co.nect the co.posite slabs with the steel *** experimental findings showed that the specimen co.nected with epoxy resin exhibited two moments redistribution phenomena during the loading process:co.crete cracking and steel bar yielding at the internal *** co.trast,the co.posite slab co.nected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the co.crete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced co.pressive failure of co.crete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of co.tinuous GFRP-co.crete co.posite slabs.

关键词： Moment redistribution GFRP-co.crete co.posite slabs bending moment experimental study analysis model

Umbilical Cable Reco.ery Load Analysis

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China Ocean Engineering 2013年第3期27卷 351-358页

作者：闫澍旺贾沼霖封晓伟李世涛 School of Civil Engineering Tianjin University China Offshore oil Engineering co. ltd. COOEC

Umbilical cable is a kind of integrated subsea cable widely used in the exploration and exploitation of oil and gas field. The severe ocean environment makes great challenges to umbilical maintenance and repair work. Damaged umbilical is usually reco.ered for the regular operation of the offshore production system. Analysis on cables in essence is a two-point boundary problem. The tension load at the mudline must be known first, and then the reco.ery load and reco.ery angle on the vessel can be solved by use of catenary equation. The reco.ery analysis also involves umbilical- soil interaction and beco.es more co.plicated. Calculation methods for reco.ery load of the exposed and buried umbilical are established and the relationship between the position of touch down point and the reco.ery load as well as the reco.ery angle and reco.ery load are analyzed. The analysis results provide a theoretical reference for offshore on-deck operation.

关键词： umbilical cable clay seabed catenary equation touch down point reco.ery load

co.figuration Analysis of Deepwater S-Lay Pipeline

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China Ocean Engineering 2011年第3期25卷 519-530页

作者：龚顺风陈凯陈源金伟良李志刚赵冬岩 Institute of Structural Engineering Zhejiang University Offshore oil Engineering co. ltd.

The safety of offshore pipeline has drawn a great deal of attention during deepwater installation due to the co.bined actions of high external pressure, axial tension, and bending moment. Meanwhile, the pipeline co.figuration has a remarkable effect on the structural behaviour of the tube. The special studies focus on the deepwater S-lay technique in the present paper. The stiffened catenary theory is applied to establish the static equilibrium governing differential equation of a pipe element, and the solution equations of the total pipeline co.figuration from a lay-barge over a stinger to the seabed are derived, The numerical iteration method for solving pipeline co.figuration is described in detail, and the co.responding program is developed to co.duct the analysis of effects of various parameters such as laying water depth, pipe diameter, thickness of co.crete weighted co.ting layer, stinger length, co.trol strain, and axial tension on pipeline co.figuration. The results show that the laying water depth, the submerged weight of the pipe, and the axial tension are the critical factors influencing pipeline co.figuration. In addition, geometrical parameters of the stinger such as length, radius, and shape have an important effect on the pipe-laying capacity of the vessel. The validity of the program is further verified by means of a co.parison with results obtained from the co.mercial finite element software OFFPIPE.

关键词： offshore pipeline S-lay stiffened caten'ary theory stinger co.figuration

Reservoir forming co.ditions and key exploration technologies of Lingshui 17-2 giant gas field in deepwater area of Qiongdongnan Basin

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Petroleum Research 2019年第1期4卷 1-18页

作者： Yuhong Xie Gongcheng Zhang Zhipeng Sun Qingbo Zeng Zhao Zhao Shuai Guo China National Offshore oil co. Ltd.Beijing100028China Research Institue co.ltd China National Offshore Oil Co.Ltd.Beijing100028China Research Institute of Zhanjiang Branch China National Offshore Oil Co.Ltd.Zhanjiang524057China

On September 15,2014,China National Offshore oil co.,ltd.announced that a high production of oil and gas flow of 1.6106 m3/d was obtained in Well LS17-2-1 in deepwater area in northern South China Sea,which is the first great oil and gas disco.ery for self-run deepwater exploration in China sea areas,and a strategic breakthrough was made in natural gas exploration in deepwater area of Lingshui sag in Qiongdongnan *** the co.bined action of climax of international deepwater exploration,high oil prices,national demands of China,practical needs of exploration,breakthroughs in seismic exploration and testing technologies,innovations in geological co.nition and breakthroughs in deepwater operation equipment,Lingshui 17-2 gas field is *** these factors,the innovation in reservoir forming geological co.nition directly promotes the *** quality of seismic data in the early time is poor,so key reservoir forming co.ditions such as effective source rocks,high quality reservoirs and oil-gas migration pathways are unable to be ascertained;with support of new seismic acquisition and processing technology,some researches show that Lingshui sag is a successive large and deep sag with an area of 5000 km2 and the maximum thickness of Cenozoic stratum of 13 *** the Early Oligocene,the Lingshui sag was a semi-closed delta-estuarine environment,where the co.lmeasure and marine mudstones in Lower Oligocene Yacheng Formation were *** Lingshui sag is a sag with high temperature,and the bottom temperature of source rocks in Yacheng Formation can exceed 250C,but the simulation experiment of hydrocarbon generation at high temperature indicates that the main part of this set of source rock is still in the gas-generation window,with resources of nearly 1 trillion cubic meters,so the Lingshui sag is a hydrocarbon-rich generation *** the Neogene,the axial canyon channel from the Thu Bon River in Vietnam passed through the Lingshui sag,and five stages

关键词： Deepwater oil and gas Source rocks Lower limit of gas generation The central canyon Diapiric zone Migration pathway Lingshui sag Lingshui 17-2 giant gas field Qiongdongnan basin

co.ling Curve's Effect on Hardening Behavior of Steel

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材料热处理学报 2004年第5期25卷 462-464页

作者： Kazuto Fukuhara Shigeru Asada Yoshihiro Tomita Syusaku Maeda Nippon Grease co. Ltd. Osaka JapanNippon Grease Co. Ltd. Osaka JapanNippon Grease Co. Ltd. Osaka JapanNippon Grease Co. Ltd. Osaka Japan

Quenching oils are co.prised mostly of mineral oil as major co.ponent, but mineral oil alone result in lower co.ling performance. Therefore, various additives are formulated as required for each particular case. co.ling curves of mineral oil as determined by JIS method can be divided into three stages, vapor film stage, boiling stage and co.vection stage. And there are many types of additives used for quenching oil, one effective to shorten vapor film stage and another to shift boiling stage toward lower temperature side. As rapid quenching required temperature range for particular steel varies pending on its shape of CCT curve"1, it is possible to provide higher quench hardening performance using quenching oil formulated of adequate additives.

关键词：淬火油冷却效果硬化性能钢

Hydrocarbon accumulation co.ditions and key exploration and development technologies for PL 19-3 oilfield

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Petroleum Research 2019年第1期4卷 29-51页

作者： Yong'an Xue Yunhua Deng Deying Wang Haifeng Yang Dingyou Lv Kai Kang Tianjin Branch co.pany China National Offshore Oil Co.Ltd.Tianjin300452China Research Institure co.ltd China National Offshore Oil Co.Ltd.Beijing100028China

The PL 19e3 oilfield is the only super-large monolithic oilfield with oil and gas reserves up to 1×10^(9) t in the Bohai Bay Basin,and it has been successfully *** and development practices have provided abundant data for analyzing formation co.ditions of this super-large *** the basis of the exploration and development history,fundamental reservoir features,and with available geological,geophysical and test data,the hydrocarbon accumulation co.ditions and key exploration&development technologies of the PL 19e3 oilfield were *** key co.ditions for forming the super-large Neogene oilfield include four ***,the oilfield is located at the high position of the uplift that co.tacts the brachy-axis of the multi-ridge slope in the biggest hydrocarbon-rich sag in the Bohai Bay Basin,thus it has sufficient hydrocarbon source and extremely superior hydrocarbon migration ***,the large-scale torsional anticlines which formed in the Neogene under the co.trol of the Tanlu strike-slipping movement provide sufficient storage spaces for oil and gas ***,the“multiple sets of co.posite reservoir-caprock assemblages”developing in the special shallow-water delta further co.tributes greatly to the effective storage space for oil and gas ***,due to the co.pling of the uplift and strike slip in the neotectonic period,extensive faulting activities co.stantly released the pressure while the late period massive hydrocarbon expulsion of the Bozhong took place at the same time,which assures the co.stant and intense charging of oil and *** super-large PL 19e3 oilfield was co.trolled by the co.pling effects of all those special geologic *** view of this oilfield's features(*** reformation caused by strike slip,and the special sedimentary environment of shallow-water delta),some key practical technologies for exploration and development have been *** technologies include:

关键词： PL 19e3 Hydrocarbon accumulation co.ditions Multiple co.posite reservoir-caprock assemblages co.stant and intense charging of oil and gas during later period Gas cloud zone Exploration and development technology

Numerical Investigation of the Dynamics for Low Tension Marine Cables

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Journal of Shanghai Jiaotong university(Science) 2015年第3期20卷 257-264页

作者：陈斌苏锋霍存锋张汝彬姚宝恒连琏 Offshore oil Engineering co. Ltd. Institute of Oceanology Shanghai Jiaotong University

This paper presents a numerical investigation into the dynamics of marine cables which are extensively used in offshore industry. In this numerical study, the Euler-Bernoulli beam model is adopted to develop the governing equations of the cable. Bending stiffness is co.sidered to co.e with the low tension problem in local area of towing cable, and thus a more accurate solution with the co.sideration of the axial elongation can be *** derived strongly-co.pled and nonlinear governing equations are solved by a seco.d-order accurate, implicit,and large time step stable central finite difference method. The quadratically co.vergent Newton-Raphson iteration method is applied to solving the discrete nonlinear algebraic equations. Then a towed array sonar system(TASS)problem is studied. The numerical solutions agree reasonably well with the experimental data and the simulated results of the references. The specified program of the present paper shows great robustness with high efficiency.

关键词： marine cable Euler-Bernoulli beam high tension low tension finite ditlerence method dynamics