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05 June 2025, Volume 12 Issue 2 Previous Issue   

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Technical Scheme for Methanol Bunkering Ship PENG Cheng, WU Hao, XIA Huabo, YANG Xueli, ZHAO Yunfei, WU Fulong 2025, 12 (2):  1-7.  DOI: 10.12087/oeet.2095-7297.2025.02.01 Abstract ( 5 )   PDF (4216KB) ( 1 )   In response to the domestic demand for ship to ship methanol refueling operations， the methanol ship to ship refueling market is planned in advance. By conducting research on the construction and renovation of methanol refueling ships， the technical solutions for refueling ships that can cover the vast majority of methanol powered ship refueling needs are reserved to assist in the construction of the methanol international refueling center. Related Articles | Metrics

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Practical Research on Improving Safety Production Management of Unattended Offshore Platforms YU Qingyuan, QIU Shuang, ZHAO Wei, CAO Zhixing 2025, 12 (2):  8-11.  DOI: 10.12087/oeet.2095-7297.2025.02.02 Abstract ( 5 )   PDF (1787KB) ( 1 )   Unattended offshore oil platforms play an important role in the exploration and development of offshore oil and gas. They are widely distributed in various oil and gas fields. With the continuous deepening of oil field development， the safety production management difficulties of unattended platforms in the production process have gradually become prominent， bringing huge challenges to the safety production work of oil fields. The safety production management of the unattended platforms are systematically expounded from the aspects of hazard management， facility safety management， unattended platform access management， and operation management. Through the implementation of various measures， the safety production level of unattended platforms can be greatly improved， thereby providing guarantees for stable production in oil fields. Related Articles | Metrics

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Analysis and Treatment of Oil Emulsification Fault in Low Pressure Compressor HU Zhongliang, ZHAO Wei, QIU Shuang, XIAO Weiwei, WANG Jibin 2025, 12 (2):  12-16.  DOI: 10.12087/oeet.2095-7297.2025.02.03 Abstract ( 3 )   PDF (1302KB) ( 1 )   Low pressure gas compressor is a key equipment for low-pressure gas recovery. With the increase of processing gas volume， severe emulsification of compressor lubricating oil occurs， which affects the stable operation of the equipment. Combined the current low-pressure gas processing parameters and equipment structure of the processing platform to analyze in depth the causes of lubricating oil emulsification in low-pressure gas compressors. Through on-site sampling and data integration，it was found that the reason for oil emulsification is the high water content in the low-pressure gas during the process. Based on this， further research was conducted on the factors causing high water content in the low-pressure gas. By taking measures such as reducing the amount of low-pressure gas recovery， increasing the processing temperature， adding defoamer， and lowering the liquid level of the scrubbing tank，the emulsification of lubricating oil was effectively reduced. The next maintenance plan was proposed， providing reference for the maintenance;of lubricating oil emulsification faults in offshore low-pressure compressors. Related Articles | Metrics

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Safety Management Analysis of Mobile Oil Production Platform XIA Wang, JIANG Chunqi, WU Bin, QIU Shuang 2025, 12 (2):  17-20.  DOI: 10.12087/oeet.2095-7297.2025.02.04 Abstract ( 4 )   PDF (935KB) ( 1 )   Based on the analysis of the operational mode and management regulations of the first mobile oil platform in China， combined with the characteristics of its export operation， this paper analyzes the regulatory feasibility of the platform according to the fixed platform from the aspects of maritime supervision focus， platform characteristics， oil spill pollution sources and related technical standards， policies and regulations. Although the platform has certain technical characteristics of “ship”， it is not for the purpose of maritime transportation， and its own moving characteristics are not obvious， and its transport operation is similar to that of fixed platform. Therefore， during the normal operation of the platform， under the premise of meeting the existing policies and regulations， the use of appropriate on-site safeguard measures can be supervised and managed according to the fixed platform， that is， it will be more reasonable and efficient to manage according to the two different states of the mobile platform (production and towing). Related Articles | Metrics

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Analysis and Treatment of Ignition Fault of FPSO Hot Medium Boiler SHAO Shifa, ZHANG Ning 2025, 12 (2):  21-25.  DOI: 10.12087/oeet.2095-7297.2025.02.05 Abstract ( 5 )   PDF (6172KB) ( 1 )   This paper mainly introduces the ignition control theory of hot medium boiler of an offshore floating production  storage offloading (FPSO)， as well as some problems that may cause boiler ignition failure in daily maintenance and operation， and makes corresponding solutions according to the problems encountered. This paper introduces the related transformation of boiler on ignition problems and puts forward some equipment maintenance plans and improvement measures in view of the easy problems. Related Articles | Metrics

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A Dynamic Simulation Method for FPSO Electric Dehydrator TONG Yingli1, CHEN Changqin1, SUN Haifang1, LIU Donghui1, LIU Xuesong1, LI Huizhan2 2025, 12 (2):  26-30.  DOI: 10.12087/oeet.2095-7297.2025.02.06 Abstract ( 3 )   PDF (1444KB) ( 1 )   According to the demand for a newly built floating production storage offloading (FPSO) oil treatment process unit in the South China Sea， applying dynamic simulation technology to establish dynamic model of electric dehydrator equipment， realizing the reproduction of the working conditions of the electric dehydrator. Compared with the simulation results and equipment design parameters of commercial simulation software HYSYS， the accuracy of dynamic simulation calculation results is verified， which provides a calculation basis for technicians to improve production operation parameters and verify the feasibility of the scheme. Related Articles | Metrics

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Research on the Development of Artificial Intelligence-Assisted System for FPSO Equipment Maintenance WU Bin, SHI Yabo, JIANG Chunqi 2025, 12 (2):  31-34.  DOI: 10.12087/oeet.2095-7297.2025.02.07 Abstract ( 4 )   PDF (1420KB) ( 1 )   Floating production storage offloading (FPSO) plays a crucial role in the offshore oil industry， and the stable operation of FPSO equipment is directly related to production safety. However， its equipment has been in a complex marine environment for a long time， far away from land and without external technical support for a short period of time. Maintenance personnel rely entirely on their own knowledge reserves and experience to carry out equipment maintenance， and its maintenance work faces many challenges. Based on the characteristics and requirements of FPSO equipment maintenance， combined with the current development status of artificial intelligence technology， we will conduct in-depth research and development of an artificial intelligence assisted system for FPSO equipment maintenance. The system aims to improve maintenance efficiency， reduce costs， ensure safe and stable operation of equipment， and promote the intelligent development of FPSO through modules such as data collection， fault diagnosis， repair plan recommendation， predictive maintenance， and knowledge management. Related Articles | Metrics

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Analysis of the Reasons for the Deterioration of MDEA Solution Affecting the Operation of the Device and Rectification Measures HUANG Qihai 2025, 12 (2):  35-39.  DOI: 10.12087/oeet.2095-7297.2025.02.08 Abstract ( 4 )   PDF (946KB) ( 1 )   The natural gas treatment plant of missan oilfield used the alcohol amine absorption method for desulfurization. In 2023， the natural gas desulfurization unit was blocked， resulting in shutdown. Through the analysis and troubleshooting of the reasons for the blockage of the rich liquid filter， it is determined that the deterioration of MDEA solution causes the blockage of the rich liquid filter， and the reasons for the deterioration of MDEA solution are analyzed. The solutions of filter element replacement and new low-pressure sweet gas pipeline were studied， and the problem of MDEA solution deterioration was successfully solved. After rectification， the iron ion concentration of MDEA solution was normal， the production of the whole unit was stable， the index of exported natural gas was qualified， and the crude oil production of the oilfield was restored to the production before shutdown， so as to ensure the stable production of the oilfield. It can provide reference for similar faults of desulfurization system in natural gas treatment plant. Related Articles | Metrics

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Application of Automatic Backwash Filter in the Production Process of a Platform in Bohai Sea YU Qingyuan, QIU Shuang 2025, 12 (2):  40-43.  DOI: 10.12087/oeet.2095-7297.2025.02.09 Abstract ( 6 )   PDF (2717KB) ( 1 )   The filter is a very important equipment in the processing process of offshore production platform， which has a wide range of applications. The good condition of the filter also plays a decisive role in the safe and stable operation of its downstream equipment and process. Therefore， the filter cleaning is also a routine work of offshore production platform. At the same time， it also increases the safety risk in the process of operation. According to the cleaning requirements of a platform filter in Bohai Sea， the characteristics and requirements of the field process are analyzed， the filter form is selected， and the automatic backwashing transformation of the filter is carried out， and good results are obtained in practice. Related Articles | Metrics

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Solution to the Take-Off Problem and Measures of the First-Class Safety Valve of an Air Compressor CHEN Hongwei, XIE Xiaobo, LI Yong, FAN Zhiqiang, ZHANG Ning 2025, 12 (2):  44-47.  DOI: 10.12087/oeet.2095-7297.2025.02.10 Abstract ( 5 )   PDF (1309KB) ( 1 )   The composition and working principle of NK 7397 piston air compressor are briefly introduced， and the take-off fault of primary safety valve is analyzed in detail. Through analysis and research， it is found that the reasons for the take-off of the primary safety valve include the failure of the valve itself， the blockage of the downstream gas flow and so on. In view of these fault causes， the corresponding solutions and preventive measures are put forward， such as strengthening preventive maintenance， reasonable selection of maintenance strategy， reducing personnel errors， etc.， in order to reduce the equipment failure rate and ensure the normal operation of the compressor. Related Articles | Metrics

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The Application of the Magnetizing Inrush Current Suppressor on the Nanhai Fenjin FPSO HU Meng1, LIANG Zhenyuan2, XU Zhisheng3, CAO Yingju3 2025, 12 (2):  48-51.  DOI: 10.12087/oeet.2095-7297.2025.02.11 Abstract ( 5 )   PDF (1947KB) ( 1 )   With the official commissioning of the Nanhai Fenjin FPSO， the stable operation of the power system has become increasingly crucial. As a special transient phenomenon during the no-load closing of transformers or the restoration after faults， the magnetizing inrush current may lead to a series of adverse consequences such as equipment damage， incorrect operation of devices， and power system failures， which have added numerous risks to the stable operation of the Nanhai Fenjin FPSO's power system. Based on the power system of the Nanhai Fenjin FPSO as the background， this paper conducts an in-depth analysis of the causes and hazards of the magnetizing inrush current， and focuses on discussing the application of the magnetizing inrush current suppressor in the Nanhai Fenjin FPSO， including its working principle， selection considerations， installation， debugging， and actual effect evaluation， aiming to provide useful references and examples for similar projects. Related Articles | Metrics

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Research on the Cause of High Temperature Alarm in Crane Hydraulic Oil and Technical Upgrade Solutions for Shutdown LIU Yiqiang, HE Zhong, ZHOU Zhenyong, GONG Yulin 2025, 12 (2):  52-54.  DOI: 10.12087/oeet.2095-7297.2025.02.12 Abstract ( 8 )   PDF (1588KB) ( 1 )   A crane on an offshore platform， featuring a motor-hydraulic drive， box-type boom， and base-mounted configuration， was manufactured in 2009 with a rated capacity of 98kN. Each summer， the hydraulic oil experiences rapid overheating. As the crane ages， this issue becomes more frequent and may result in operational shutdowns， significantly impacting production efficiency. Aim to analyze the causes and effects of elevated hydraulic oil temperatures in the crane， systematically identify underlying issues， and implement technical enhancements to effectively mitigate this problem. Related Articles | Metrics

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Analysis and Countermeasures of Variable Speed Drive Failures in High Temperature Environments 2025, 12 (2):  55-58.  DOI: 10.12087/oeet.2095-7297.2025.02.13 Abstract ( 3 )   PDF (1450KB) ( 1 )   Variable speed drive is widely used in submersible electric pump oil production methods due to their ability to reduce energy consumption， prolong the efficiency of electric pump systems， and stabilize system voltage. By analyzing the causes of variable speed drive failures in high-temperature environments and proposing effective strategies to reduce the temperature of variable speed drive， the stability， safety， and efficiency of oilfield production operations have been ensured， providing data and theoretical basis for how to reduce variable speed driver operation failures in high-temperature environments. Related Articles | Metrics

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Research and Application of Maintenance and Renovation Technology of High-Pressure Plunger Pump WANG Chao, LU Fengtao 2025, 12 (2):  59-63.  DOI: 10.12087/oeet.2095-7297.2025.02.14 Abstract ( 6 )   PDF (3079KB) ( 1 )   High-pressure plunger pumps are widely used in industrial applications because of their high efficiency and reliability. The common faults of mechanical， hydraulic and electrical systems of high-pressure plunger pump are discussed， and the repair and renovation technology of each part are elaborated， including the repair of piston and cylinder block， the renovation of valve， the upgrading of sealing technology and the modernization of control system. Through the application of these technologies， the performance and service life of the pump are significantly improved， and comprehensive technical guidance for the optimization and maintenance of high-pressure piston pumps is provided. Related Articles | Metrics

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Research on Reducing the Frequency of Startup Failures in Emergency Diesel Fire Pumps XIN Gengfei, JI Hongxuan, MO Zhixiong, LI Ke 2025, 12 (2):  64-68.  DOI: 10.12087/oeet.2095-7297.2025.02.15 Abstract ( 4 )   PDF (2440KB) ( 1 )   The startup failures of the diesel fire pump on the “Offshore Oil 111” FPSO were systematically studied, and the causes of these failures and potential improvement measures were analyzed. The research shows that by optimizing the temperature management of the control cabinet and performing regular maintenance， the frequency of startup failures has been successfully reduced to no more than once per quarter， significantly enhancing the reliability of the equipment and the safety of the FPSO. The discussion on the fire safety of offshore oil platforms provides a reference idea for related fields， and the proposed improvements offer insights for equipment management in other offshore operations. Related Articles | Metrics

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Application and Effect of Well Testing Analysis Model in Water Injection of Fractured Well Group in Low-Permeability Oil Field XING Chuanheng1, SI Yuanyuan2 2025, 12 (2):  69-73.  DOI: 10.12087/oeet.2095-7297.2025.02.16 Abstract ( 6 )   PDF (3290KB) ( 1 )   Fracturing completion technology is an effective method of increasing the production of oil wells in the production and development of low-permeability oil fields. Due to the irregular opening and closing of fractures caused by high-pressure or continuous water injection in the oil field， water flooding usually occurs in the direction of the oil wells， which affects the production of the oil field. Well testing method achieves the connectivity between oil and water wells by short-term adjustments in well production condition which results in well pressure and production change. This article summarizes the causes of dynamic fractures in low-permeability oil fields during water injection. Quantitatively evaluate the connectivity between oil and water wells by using well testing methods. Control the connectivity of fracture between oil and water wells and improving the effect of water injection by optimizing the unstable water injection. Related Articles | Metrics

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Maintenance Measures and Quality Control for Corroded Coil Pipes of Thermal Medium Boilers in Offshore Facilities WANG Yongsheng1, YUE Zongfang1, ZHAO Yuhui2, LI Zhiping1, HAO Jianjun1, MO Zhixiong1 2025, 12 (2):  74-80.  DOI: 10.12087/oeet.2095-7297.2025.02.17 Abstract ( 6 )   PDF (7658KB) ( 1 )   Based on issues such as corrosion， weld cracking， and missing parts of the front end cover， protective plate， and coil pipe groups of thermal medium boilers， the maintenance and replacement plans， cleaning and protection measures， coil pipe welding plans， and quality control procedures during the maintenance process are designed to ensure the smooth progress of the maintenance work for offshore thermal medium boiler coil pipes to the greatest extent and contribute to safe production， cost reduction， and efficiency improvement. Related Articles | Metrics

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Application Research on Reducing the Frequency of Air Conditioning Fan Failures ZHANG Sida, ZHOU Yong, WANG Xin 2025, 12 (2):  81-87.  DOI: 10.12087/oeet.2095-7297.2025.02.18 Abstract ( 4 )   PDF (2885KB) ( 1 )   Central air conditioning is an important device for controlling the temperature in floating production storage offloading （FPSO） living quarters， mainly composed of chiller units and air handling units. By elaborating on the cooling characteristics of central air conditioning and the existing problems of air handling units， different types of fan failures were analyzed. By measuring vibration values， measuring environmental humidity， replacing belt materials， and changing belt models， the application effects were studied， providing a reference theoretical basis for reducing the frequency of fan failures in central air conditioning air handling units. Related Articles | Metrics

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Application and Maintenance of Automatic Control System in Petrochemical Industry ZHANG Yu 2025, 12 (2):  88-91.  DOI: 10.12087/oeet.2095-7297.2025.02.19 Abstract ( 7 )   PDF (2791KB) ( 1 )   The efficient application of automation control technology in the petrochemical industry plays a positive role in improving production efficiency and safety assurance.Based on this， we analyze it from the perspective of application and maintenance of automation control systems， enhancing the integration of petrochemical instrumentation and automation control technology， improving the level of informatization and the stability of system operation， has profound significance for improving the effectiveness of petrochemical instrumentation automation control. By focusing on the deep application of automation control technology and system maintenance strategies， the level of automation control and operational stability of offshore platforms are improved. Related Articles | Metrics

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Brief Analysis of Boarding Scheme for Export Subsea Pipeline of Mobile Wellhead Platform ZHANG Fanghai 2025, 12 (2):  92-95.  DOI: 10.12087/oeet.2095-7297.2025.02.20 Abstract ( 5 )   PDF (1312KB) ( 1 )   The mobile wellhead platform has the characteristics of being movable and reusable， and it is mainly used for the development of marginal oilfields. The platform is supported by four pile legs. Due to the lack of a supporting structure for the subsea pipelines and cables， it is impossible to board the platform with the jacket as the supporting structure like in a jacket platform.The advantages and disadvantages of three types of boarding methods relying on the wellhead riser， the liftable pipe rack， and the pile legs are analyzed. Boarding relying on the pile legs has advantages such as being liftable， reusable， having little impact on the platform's performance， and having a simple system. However， it is necessary to address the impact of the boarding riser passing through the platform's enclosure area on the structure and the occurrence of vortex-induced vibration phenomena. Analyzing and researching the vortex-induced vibration of the boarding riser provides a theoretical basis for the vibration control of the riser. Related Articles | Metrics

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Research on the Efficiency and Stability of the Filter Element in Natural Gas Lubricating Oil Aggregation Separators ZHANG Guodong 2025, 12 (2):  96-101.  DOI: 10.12087/oeet.2095-7297.2025.02.21 Abstract ( 4 )   PDF (4110KB) ( 1 )   Based on the on-site actual design and operation data of the post installed lubricating oil coalescence separation system of natural gas compressors in offshore gas fields. The filtration performance of the filter element in the coalescence separation system under the same aerosol dust generation conditions is studied， and the influence of operating variables such as temperature， gas volume， and aerosol concentration on the stability of the filter element filtration performance is examined. The experimental results show that the larger the air filtration capacity of the filter element， the less affected the concentration and temperature on the filtration efficiency， and the better the stability of the filtration efficiency. When the amount of filtered gas remains constant， the lower the temperature， the less affected the change in aerosol concentration on the filtration efficiency， and the more stable the operation; The higher the aerosol concentration， the less affected the temperature change on the filtration efficiency， and the more stable the operation. This article can provide references for the operation control and optimization of coalescence filters in actual production of gas fields. Related Articles | Metrics

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Process Innovation Practices for Maintaining Stable Oilfield Production during the Overhaul Period of Natural Gas Plants WANG Fanghao, CHEN Jizhen, WANG Peng 2025, 12 (2):  102-106.  DOI: 10.12087/oeet.2095-7297.2025.02.22 Abstract ( 4 )   PDF (3802KB) ( 1 )   Focusing on the issue of maintaining stable production in an oil and gas field in Iraq during the overhaul period of its natural gas processing units and conducts research and discussions. It analyzes the key factors that make it difficult to maintain stable production in the oil and gas field during the overhaul period and puts forward effective solutions. It analyzes the feasibility of the GSU unit's online operation during the overhaul period， upgrades and modifies the technological process， and systematically elaborates on the preconditions and safety precautions for the GSU-2 unit's online operation. Through process technology innovation and practice， the problems restricting production and maintaining stable production during the overhaul period have been effectively solved， thus ensuring the production tasks of the oil and gas field. Related Articles | Metrics

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Analyzing the Key Techniques and Safety Measures for Steel Structure Hoisting in Construction Engineering ZHOU Zhenyong, LIU Yiqiang 2025, 12 (2):  107-110.  DOI: 10.12087/oeet.2095-7297.2025.02.23 Abstract ( 5 )   PDF (2067KB) ( 1 )   The quality of steel structure construction and the overall stability of these structures are crucial for ensuring the safe and efficient progression of construction projects， given the significant role that steel structures play in such undertakings. To enhance the efficacy of various technologies employed during the lifting operations of steel structures within buildings， it is imperative to adopt appropriate techniques. This approach will help uphold rigorous standards concerning both the quality of lifting procedures and structural integrity. Furthermore， it is essential to implement robust measures that strengthen safety protocols during steel structure lifting activities in construction projects， effectively manage potential safety risks associated with these operations， and ultimately facilitate a secure and rational advancement of practices related to steel structure lifting. Related Articles | Metrics

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The Idea and Scheme of Process System Transformation of FPSO under Typhoon Mode SHAN Tao1, ZHANG Zhenxiang2, GONG Yulin2, XU Yejun2 2025, 12 (2):  111-116.  DOI: 10.12087/oeet.2095-7297.2025.02.24 Abstract ( 4 )   PDF (2276KB) ( 1 )   The offshore oil and gas fields in the South China Sea have long been plagued by typhoons. The remote control of typhoon mode in oilfield can reduce the influence of typhoon on offshore oilfield production. The idea and scheme of process system transformation of floating production storage offloading under typhoon mode are described， which has some reference for other offshore oil field process system transformation of typhoon remote control mode. Related Articles | Metrics

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Feasibility Analysis of Layered Water Injection Assisting Flow in Thin Interbedded Oil Fields of Strong Water Bodies CHEN Xueli, WANG Li, ZHANG Ruigang 2025, 12 (2):  117-119.  DOI: 10.12087/oeet.2095-7297.2025.02.25 Abstract ( 3 )   PDF (1877KB) ( 1 )   Water injection in offshore thin interbedded oil fields is a great challenge because of its high cost and difficulty in construction. Through long-term research and practice， separated layer self-source enclosed water injection technology is put forward to supplement energy. Based on the characteristics of offshore oil fields， the screening principles of target layer， water source layer and pilot water injection well group are formulated. We developed self-source enclosed injection pipe string and underground data monitoring system， such as measuring and adjusting， water quality monitoring， etc.， and has the huge advantages of multi-purpose in one well， low cost， green energy saving and quick effect. This technology can reduce costs related to drilling， platform facilities and surface water injection facilities， and effectively reduce water corrosion and reservoir damage. It has a wide range of reference and promotion significance in similar thin interbedded water injection oilfields offshore. Related Articles | Metrics

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Finite Element Analysis and Monitoring Scheme Design for the MCM of a Submerged Turret Production Single-Point Mooring System LIU Yixiang, LI Peng, LIU Jiannan, WANG Kun, SHI Hemu 2025, 12 (2):  120-126.  DOI: 10.12087/oeet.2095-7297.2025.02.26 Abstract ( 4 )   PDF (10412KB) ( 1 )   The submerged turret production (STP) single-point mooring system operates in an environment subjected to the combined effects of mooring forces， wind， waves， and currents. Through contact with structures such as the buoyancy and mating cone module (MCM)， it transfers the impact of these loads to the hull. Under the prolonged influence of alternating loads， the MCM is prone to fatigue issues at positions where structural stress is concentrated， potentially leading to crack initiation; under extreme wind and wave conditions， there may even be a failure of structural ultimate strength， rendering the floating production storage offloading (FPSO) unable to operate normally. Therefore， developing a design for a multi-parameter monitoring and early warning system that is safe， reliable， and stable for the STP single-point system is crucial for ensuring the normal， steady， and secure operation of the FPSO. This paper focuses on the MCM of a certain FPSO， conducting structural finite element analysis to calculate the stress distribution state of the MCM structure under working conditions， identifying high-stress locations in critical areas， and providing recommendations for sensor placement schemes. This lays the groundwork for developing a monitoring and early warning system for the STP single point and arranging stress sensors. Related Articles | Metrics

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South China Sea Beibu Gulf Offshore Oil Field Mobile Offshore Production Unit Feasibility Study LIU Tao 2025, 12 (2):  127-131.  DOI: 10.12087/oeet.2095-7297.2025.02.27 Abstract ( 6 )   PDF (1147KB) ( 1 )   For the economical development of the marginal offshore oilfields, which are characterized by low-grade oil reserves and a shorter production period but nearby to existing production facility， this article will introduce the mobile offshore production unit for the purpose of implementing the economic development, while also providing guidance for the development of similar oil fields. Related Articles | Metrics

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Maintenance Practice of Electric Heaters on a Certain Offshore Oil Production Platform ZHANG Dong, YU Chenglong 2025, 12 (2):  132-135.  DOI: 10.12087/oeet.2095-7297.2025.02.28 Abstract ( 4 )   PDF (1419KB) ( 1 )   The well flow extracted from a certain offshore oil production platform has high temperature， high salinity， and contains impurities such as hydrogen sulfide and sand. In order to meet the export temperature requirements， an electric heater is used for direct heating. During the operation of the equipment， faults such as low insulation of the heater， high temperature protection shutdown during system startup， and reduced heat exchange efficiency occur， which affect the normal production of the oilfield. Through material selection and manufacturing process review during equipment manufacturing， equipment disassembly， and laboratory analysis and testing of scale on heating tube surfaces， the direct and indirect causes of the malfunction are analyzed， and effective measures are provided to avoid low insulation of the heater， high temperature protection and shutdown during system startup， etc.， in order to provide reference and guidance for the operation and maintenance of electric heaters on other platforms. Related Articles | Metrics

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Optimization of the Crude Oil Cooler for “Hai Yang Shi You 123” FPSO WENG Xi, TAN Jingxuan, ZHOU Yong, ZHANG Wei 2025, 12 (2):  136-139.  DOI: 10.12087/oeet.2095-7297.2025.02.29 Abstract ( 6 )   PDF (6199KB) ( 2 )   The “Hai Yang Shi You 123”FPSO crude oil cooler is a plate heat exchange, which normally operates with one in use and one as backup. As the oil production in the oilfield gradually increases， the load on the crude oil cooler gradually increases， resulting in poor heat exchange efficiency. Through physical property analysis of oilfield crude oil， the main reason for the poor heat exchange effect of the cooler is that the crude oil has a high wax content， a high wax precipitation point， and severe wax deposition on the side plate wall of the crude oil， which reduces the heat exchange capacity between the crude oil and seawater. To efficiently solve this problem， a comprehensive analysis was conducted on the equipment structure and process status of the crude oil cooler. A creative idea was proposed to optimize the two coolers into series operation， the application effect of the cooler series connection was verified on site， providing a reference for the stable operation of FPSO in the future. Related Articles | Metrics

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Fault Analysis of Low Outlet Pressure and Reduced Speed during Slag Discharge of Lube Oil Separator WENG Fei, ZHOU Yong, SHI Yabo, ZHOU Chuxiong 2025, 12 (2):  140-143.  DOI: 10.12087/oeet.2095-7297.2025.02.30 Abstract ( 5 )   PDF (2089KB) ( 1 )   As a key equipment for lube oil filtration in large diesel units of offshore facilities， the main function of the lube oil separator is to separate the lube oil used in the fuel oil unit. Through centrifugal separation， the impurities and moisture inside the lube oil are removed， ensuring the quality of the lube oil and avoiding damage to the operation of the fuel oil unit due to lube oil deterioration. At the same time， the service life of the equipment is improved， the frequency of lube oil replacement is reduced， and the economic benefits are improved. In order to reduce the frequent shutdown of the lube oil separator due to speed reduced during slag discharge and low outlet pressure， the cause of the fault is analyzed and a solution is proposed， providing a reference basis for equipment fault handling. Related Articles | Metrics

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Weight Analysis of Comprehensive Evaluation Index of FPSO Oil， Gas and Water Separation System Based on Analytic Hierarchy Method YU Chao, TONG Yingli, LIU Hao, CHEN Changqin, SUN Haifang, SONG Kunming 2025, 12 (2):  144-151.  DOI: 10.12087/oeet.2095-7297.2025.02.31 Abstract ( 5 )   PDF (1008KB) ( 1 )   In order to better analyze floating production storage offloading （FPSO） faults and construct an FPSO fault evaluation system， this paper uses analytic hierarchy to conduct fault attribution research on FPSO. The three elements of three-phase separator， electrodehydrator and sea pipe of FPSO oil， gas and water separation system were selected as the research objects， and the structural model of hierarchical analysis was established by processing and analyzing the causes of system failures. The hierarchy is used to judge the failure factor indicators， and the weight value of each failure factor indicator is calculated to analyze the cause of the failure. The results show that the weight of electrodehydrator faults is large and the degree of influence is also large， and the weight values of each index level can be well compared through hierarchical analysis to judge the degree of influence in each level. Related Articles | Metrics

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Research on Fine-Grained Management of Electric Submersible Pump Wells Based on Artificial Intelligence WU Binfeng1, ZHANG Wei2, WANG Dong2, ZHANG Zhenxiang2 2025, 12 (2):  152-155.  DOI: 10.12087/oeet.2095-7297.2025.02.32 Abstract ( 6 )   PDF (1699KB) ( 1 )   This article aims to explore the strategies of artificial intelligence for the fine-grained management of electric submersible pump wells. By elaborating the management theory of electric submersible pumps and the application of artificial intelligence in industrial management， and analyzing relevant domestic and foreign cases， fine-grained management strategies including real-time online monitoring and warning， intelligent diagnosis of working conditions， and online optimization design are proposed to improve the management level and efficiency of electric submersible pump wells. Related Articles | Metrics

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Research on Fatigue Life Assessment Methods for Mooring Systems under Seasonal Load Effects LIU Shixue 2025, 12 (2):  156-161.  DOI: 10.12087/oeet.2095-7297.2025.02.33 Abstract ( 5 )   PDF (4250KB) ( 1 )   The mooring system of a floating production storage offloading (FPSO) unit is crucial for its stable positioning at sea. Given that the mooring system must endure complex marine conditions over decades of service， component fatigue becomes a critical factor affecting its safety and reliability. This paper aims to study the fatigue life assessment methods for mooring systems， taking into account the characteristics of seasonal loads. Initially， based on actual monitoring data， we conducted research on fatigue life assessment methods for mooring systems. Through an in-depth analysis of long-term wind， wave， and current data in a specific area of the South China Sea， we discovered that the environmental loads in this region exhibit significant seasonal variation patterns， which are vital for accurately assessing the fatigue life of mooring system components. Therefore， this paper incorporates seasonal load characteristics into the fatigue life assessment model to more accurately simulate actual sea conditions and evaluate fatigue life. Using an FPSO in the South China Sea as a case study， the analysis results indicate that the fatigue life of the mooring chains from Line 1 to Line 4 is significantly lower than that of other mooring chain groups. This finding underscores the importance of considering load seasonal characteristics in mooring chain fatigue assessments， providing essential reference points for future engineering operations and maintenance. Related Articles | Metrics

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Research on Reducing the Frequency of Stagnation of Level Gauge in Sequence One Electrostatic Dehydrator YU Sheng, TAN Jianhua, REN Guobao, LU Xiangquan 2025, 12 (2):  162-165.  DOI: 10.12087/oeet.2095-7297.2025.02.34 Abstract ( 3 )   PDF (2744KB) ( 1 )   Whether the oil-water interface level gauge of the electrostatic dehydrator can accurately reflect the real-time liquid level inside the tank has a decisive impact on the oil-water separation effect of the electrostatic dehydrator， ultimately affecting the lower compartment water content of crude oil. This article conducts an in-depth analysis of the sticking problem of the electrostatic dehydrator level gauge in the sequence one of the “Offshore Oil 111” FPSO， and explores the reasons for sticking and improvement measures. Research has shown that by changing the flushing cycle of the electrostatic dehydrator level gauge and installing an extension tube to increase the height of the lower drainage port by about 15cm， the frequency of jamming has been successfully reduced to no more than 6 times per quarter， significantly improving the reliability of the equipment， effectively reducing the daily workload of on-site personnel， and improving work efficiency. Related Articles | Metrics

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Fatigue Analysis Affected by Out-of-Plane Bendingfor Mooring Chain of a Floating Offshore Structure ZHANG Lin, ZHANG Bin, SHI Hemu 2025, 12 (2):  166-172.  DOI: 10.12087/oeet.2095-7297.2025.02.35 Abstract ( 4 )   PDF (5295KB) ( 1 )   A fracture mechanics based approach for offshore mooring fatigue assessment was developed. Then both S-N curves and fracture mechanics based fatigue analysis for the mooring system of a floating offshore structure were carried out. The low frequency and the wave frequency load processes were regarded as two random load processes for calculating the tensions along mooring lines excited by motions of low frequency and wave frequency. The dual narrow band method was then performed for combining the mooring line tension ranges， and the fatigue damage of mooring lines was estimated by both S-N curves and fracture mechanics based approaches. A comparison between S-N curves based fatigue assessment approaches and the developed fracture mechanics based mooring fatigue assessment approach was made， and the results showed that fatigue lives estimated by these two approaches were generally comparable if the safety factors suggested by DNV were applied to S-N curves based approaches. The developed fracture mechanics based mooring fatigue assessment approach was then applied for mooring chain links subjected to out-of-plane bending （OPB）. The result showed that the fatigue life of mooring chains on 5， 7 and 9 pocket sprockets affected by out-of-plane bending was reduced by 19%， 11% and 9% respectively. Related Articles | Metrics

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The Green Upgrade Route of a Fleet Based on IMO GHG Reduction Strategy ZHOU Yi1, LI Meng1, ZHAO Zhongqiu2, LI Guogang2, FENG Yi2, MENG Xuehao1 2025, 12 (2):  173-178.  DOI: 10.12087/oeet.2095-7297.2025.02.36 Abstract ( 4 )   PDF (7649KB) ( 1 )   The ambitious level of greenhouse gas emissions reduction in international shipping has been further enhanced by the MEPC 80 meeting， and the accounting requirements for greenhouse gas emissions based on the full life cycle of ship fuels have changed the “rules of the game”. All parties are actively promoting the process of shipping emissions reduction. There are differences in the development foundation and characteristics of the fleet， which leads to differences in the choice of emission reduction paths among different fleets. Taking a certain shipping company's ocean going fleet as the research object， a carbon reduction analysis model was established to analyze the conventional petrochemical fuel path， methanol fuel path， and ammonia/hydrogen fuel path. The carbon reduction emissions and carbon reduction costs of each path were explored， and short-term and long-term carbon reduction routes applicable to domestic fleets were proposed. Related Articles | Metrics

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Review on the Development and Research on Magnetic Flux Leakage Detection Technology LI Bailin 2025, 12 (2):  179-182.  DOI: 10.12087/oeet.2095-7297.2025.02.37 Abstract ( 4 )   PDF (1490KB) ( 1 )   Magnetic flux leakage (MFL) detection technology， renowned for its high reliability and non-contact detection capabilities， is widely applied in safety detections of petrochemical storage tanks and pipelines. Firstly， the theoretical development and technical principles of MFL detection are introduced. Then， the research status of defect identification， quantitative analysis， and inversion methodologies in MFL technology are explained in detail. Finally， a summary is provided， highlighting the challenges faced by current artificial intelligent methods in this field. Related Articles | Metrics