On September 1, the author learned that COOEC has successfully developed a complete set of on-line mooring safety technology for FPSO (floating production storage and unloading device), and the independent research and development of China's FPSO single point mooring core technology has reached a new peak. Mooring system is one of the most critical facilities in FPSO technology, which is called the "lifeblood" of FPSO. In the past, the design and manufacturing of FPSO mooring system has been monopolized in the hands of a few foreign companies. Once the mooring system fails, it is necessary to hire foreign technicians to provide solutions, which is not only very expensive, but also difficult to effectively guarantee the oil field production time rate. The FPSO on-line anchor safety technology has successfully broken the foreign monopoly, which is of great significance. It is reported that this scientific and technological achievement has been successfully applied to "offshore oil 111" FPSO in July this year. "Offshore oil 111" serves Panyu 4-2 / 5-1 oilfield, and its mooring system is designed and installed by a foreign company. In recent years, the mooring system needs to be upgraded and updated urgently. COOEC has adopted more advanced design methods than foreign companies, combined with underwater test results, and creatively carried out a complete set of detailed design work including mooring anchor legs and suction anchors, which not only restored the "health" of FPSO, but also made up for the design defects of foreign companies. Previously, the design company has preliminarily mastered the key technology of mooring system design through scientific research topics such as "feasibility study of 'Shengli' FPSO". (correspondent Liu Bo)
On July 10, Zhifu Island, the main operation ship of Jinzhou 20-2sw and Jinzhou 21-1whpa platform demolition and related submarine pipeline and submarine cable abandonment construction projects, was anchored in place and started construction. The offshore construction of China's first packaged oil field demolition project was officially launched. Jinzhou 20-2sw and Jinzhou 21-1whpa platforms were built in the early 1990s and 2007 respectively, and both abandoned wells and stopped service this year. According to the management measures for waste disposal of offshore oil and gas production facilities, the two abandoned platforms shall be demolished together with the blocks, jackets, submarine pipelines and cables, flare arms, trestles and other structural accessories. For this demolition, the platform inspection and demolition Department of COOEC maintenance company has carried out all-round preparations since last year. The whole offshore construction is expected to be completed by the end of September this year. (correspondent song Haitao, Ma Qun)
It was learned on June 27 that the maintenance project of "Nanhai Endeavour" FPSO (offshore floating production storage and unloading unit) single point mooring system implemented by COOEC Shenzhen company was completed 10 days ahead of schedule, This is the first on-site direct replacement of new mooring system after FPSO release in China. (Deng Yibo)
On the eve of the Spring Festival, good news came from Caofeidian 11-1 / 2 oilfield. The "offshore oil 112 single point mooring monitoring and prediction system" independently developed by CNOOC Gaotai company (hereinafter referred to as Gaotai company) operated smoothly and data acquisition and transmission was smooth. The system passed the offshore acceptance on January 30, 2013. It is the only monitoring and prediction system designed for underwater mild steel arm single point mooring system in the world. The system successfully realizes the tailored design of underwater mild steel arm single point mooring system, and can monitor all indexes in the whole process and all directions. The system consists of four modules, including sensor module, data acquisition and transmission module, data management module and response prediction and loading optimization module. It can realize high-precision real-time monitoring of marine environmental conditions, FPSO six degrees of freedom motion and position, single point mooring force, single point superstructure vibration and other information. According to Zhang Yigong, general manager of Gaotai company, the system can also quickly give the motion state of FPSO and the stress of mooring system according to the input environmental conditions and different loading and unloading conditions, and can provide operators with FPSO loading and unloading suggestions in extreme environments. The underwater mild steel arm single point mooring system adopted by "offshore oil 112" was officially put into operation in July 2004, and the new and old single point mooring system will be replaced in 2014. "The monitoring and forecasting system we designed will monitor various indicators in the operation of new and old single points in real time, ensure the safe wintering of old single points, verify the design indicators of new single points and ensure the smooth operation of new single points," Zhang Yigong said. Up to now, the system has operated reliably and stably, and a large number of field data have been obtained, which provides favorable data support for the safe operation of single point mooring system. Gaotai company has also developed "offshore oil 111" and Enping FPSO single point mooring monitoring and prediction system. After passing the acceptance, it will make up for the application gap of this type of system in turret single point mooring system in the South China Sea. This also indicates that the company has mastered the design, development and integration capabilities of mild steel arm and inner turret single point mooring monitoring and prediction system, and can provide various technical services including system design, procurement support, system integration and development, installation support and key equipment to customers at home and abroad. (correspondent Wu Cuiping, Liu Chao)
Single point mooring system refers to the system that keeps FPSO (floating production storage and unloading device) rotating freely around the fixed point under the combined action of wind, wave and current. As the central link of FPSO, its structural integrity is very important. Due to the limitation of underwater detection, the problem of the system is often found in the "qualitative change". How to make an effective "physical examination" of the system has always been a "heart disease" of oilfield operators. At present, the mooring monitoring and Prediction Technology launched by the technical center of CNOOC development oil production company (hereinafter referred to as the technical center) can monitor the safety status of single point mooring system in real time and effectively cure this "heart disease". Mooring monitoring and prediction technology is similar to "dynamic ECG" inspection technology. It measures the safety of the whole system by "fixed-point" monitoring at key parts of the mooring system. Mooring monitoring and prediction technology is an integration of four core technologies: on-site monitoring technology, sensor integration technology, real-time data acquisition and display technology and risk-based prediction technology. It can continuously monitor the environmental data in the operating sea area, the movement process of FPSO and the stress status of key components for 24 hours, and can find "internal injuries" that are not easy to find in routine detection. It is an important tool for clinical analysis of mooring system An important objective basis for judging "health status". It is understood that the traditional detection methods are mainly routine appearance detection, and the detection items and categories are relatively single, which can not find the hidden dangers in the "quantitative change period" in time. Therefore, the technical center has specially established a project team of "FPSO single point mooring on-line monitoring system" to test "offshore oil 112" and "offshore oil 113" FPSOs with the support of the development and production department and the General Research Institute of CNOOC. Through this technology, technicians can collect the environmental data of the operating sea area and the data related to FPSO movement in real time. After centralized analysis and processing of the data, they can predict the safety of the mooring system and put forward active countermeasures. In addition to the on-line monitoring function, the data obtained can play an important role in mooring system assessment, the improvement of the complete environmental database of each FPSO operation sea area, loading and loading optimization before the arrival of typhoon, mooring system safety prediction, etc. At present, mooring monitoring and prediction technology has been applied to "offshore oil 113" and "offshore oil 112" FPSOs, and the new "offshore oil 118" FPSO has also "customized" this technology in the ship design and construction stage. "In the next step, strive to promote the technology of fp-so in various sea areas and start to establish FPSO single point mooring data center. At the same time, carry out technical research such as' nondestructive testing of mooring steel cables' to promote the integrity management of single point mooring system." Liu Yuheng, manager of the technical center, said. (correspondent Li Yan, Yan Ming)
On February 18, it was learned from COOEC that the maintenance / pipeline company under the company introduced a new hot water service system and successfully completed the land test and acceptance. The hot water suit system is mainly used to overcome the difficulty of low temperature during winter diving or deep diving, and can improve the underwater comfort of divers. The hot water suit system accepted this time is imported from the UK and provides hot water by diesel heating. It is equipped with 2 submersible pumps, 2 booster pumps and 3 combustion boilers, which can provide hot water for up to 3 divers. During the experiment, the divers wore hot water suits and experienced the heating effect of hot water suits. When the outlet water temperature is set at 45 ~ 50 ℃, the diver feels comfortable and does not suffer from sudden cold and heat. Before the introduction of the hot water suit system, divers could only last about 45 minutes in the sea water near zero when diving in the Bohai Bay in winter. After the application of the system, the divers can be completely unaffected by low temperature, the underwater operation time can be greatly prolonged, and the comprehensive operation efficiency can be improved by about 50%. (correspondent Chen Yong, Deng Ping)
On the evening of August 14, the construction personnel of COOEC maintenance company successfully completed the connection between the new single point underwater rigid arm (yoke) of cfd11-1 / 2 oilfield of Caofeidian operation company and "offshore oil 112" FPSO, which is the world's first and only underwater rigid arm FPSO release and reconnection operation. "Offshore oil 112" FPSO and its single point system are the center of oil and gas transmission in the whole oilfield. The release and reconnection of FPSO is the most difficult, risky and challenging node for the resumption of production in Caofeidian oilfield. The whole construction includes the release of FPSO from the old single point, cruising in the nearby safe sea area, and the connection between FPSO and the new single point. The completion of this operation directly promoted the process of resumption of production in Caofeidian oilfield. (correspondent Yan Bin, Liu Xueyi)
It was learned on August 4 that the National 863 project "key technology of underwater structure repair system based on friction lap welding" undertaken by COOEC in the 12th Five Year Plan has completed the development of underwater friction lap welding principle prototype and entered the preparation stage of engineering prototype development. "Friction lap welding technology is less affected by water depth," said Yang Fan, a welding engineer. Traditional manual arc welding is affected by deep-water water pressure and water flow, and its stability and welding adhesion will be greatly reduced. If it is careless, there will be welding joint deviation, which will affect the work efficiency and quality of the whole pipeline. The friction stack welding technology uses the principle of consuming plug rod, and the pressure provided by it can directly fill the plug rod into the air hole to complete the welding, so the underwater welding is more efficient and stable. Xu Wei, a welding engineer, said: "the friction lap welding repair system for underwater structures provides a new development idea for China's offshore engineering to go deep water." (correspondent Liu Guangya, Yang Fan, Liu Bin)
On July 31, the reporter learned that Shenzhen Branch of the Company Limited (hereinafter referred to as Shenzhen Branch) has successfully completed the first online replacement of FPSO mooring system in China under the condition that FPSO is not released and the oil field is not shut down. In the early morning of July 13, as the divers fastened the connector to the last anchor chain 105 meters underwater, the underwater mooring system composed of three groups of 9 mooring legs firmly "tied" the 150000 ton "offshore oil 111" FPSO (floating production, storage and unloading device) to the sea surface. The "offshore oil 111" inner turret single point mooring system serving in Panyu oilfield has reached the design life of 10 years, and various components of the system have been corroded and worn to varying degrees. CNOOC adopted the new mooring system independently designed and manufactured for the first time, successfully implemented the "transplant operation", and broke the technical barriers of foreign companies. The new mooring system is designed according to the new safety standards and can be used for 20 years after transformation, breaking a major bottleneck in the subsequent rolling development of Panyu oilfield. During the replacement of "offshore oil 111" mooring system, oilfield production, surface oil extraction and underwater construction are carried out at the same time. After scheme optimization, the replacement period of each mooring leg was shortened from the initial 8 days to 4 days. At the same time, Shenzhen Branch seized the best climate window this year, and the offshore construction was completed one month ahead of schedule. According to Chen Jiejun, general manager of Panyu operation company, Panyu oilfield has maintained high and stable production by adopting the online replacement scheme, which can avoid the production loss of nearly 8 million barrels of crude oil. Since 2006, Shenzhen Branch has cooperated with relevant domestic research institutions and manufacturers to tackle key technical problems, independently maintained and transformed seven sets of single point mooring systems in the eastern waters of the South China Sea, and gradually mastered the core technology of single point mooring system. The mooring system has achieved a leap from foreign general contracting to domestic design and manufacturing, which provides a new guarantee for China's offshore engineering to enter deep water independently. (reporter Mou Yintao, correspondent Yang Tianxiao, Qin Liwen)
On July 30, the author learned from Shenzhen offshore oil engineering Underwater Technology Co., Ltd. that with the arrival, assembly and parallel commissioning of the last internationally most advanced ROV (underwater vehicle) system operating handle, China's first ROV pilot training system was completed in Shenzhen. The system consists of a set of ROV console with 1:1 true ratio, control stack and administrator controller. The system provides real operation experience for ROV pilots by fully simulating the operation of ROV underwater manipulator and intervention tools carried by ROV. The completion of the system enables the training of ROV pilots to be "moved" from the sea to the land, which will further improve the training efficiency and quality. (correspondent Deng Yibo)
