论文介绍了国内自主设计的5 000 k W绞刀功率自航绞吸船——"天鲲号"的性能概况,分别对总体布置、动力系统配置、柔性钢桩台车定位系统、智能化集成控制系统和三缆定位系统等核心关键技术应用研究进行了阐述。通过对本船核心...论文介绍了国内自主设计的5 000 k W绞刀功率自航绞吸船——"天鲲号"的性能概况,分别对总体布置、动力系统配置、柔性钢桩台车定位系统、智能化集成控制系统和三缆定位系统等核心关键技术应用研究进行了阐述。通过对本船核心关键技术的研发,实现了多种核心关键技术的最佳匹配组合,对提高我国大型疏浚船舶设计技术的总体水平将起到促进作用,对今后研发设计同类型船舶有一定借鉴意义。展开更多
When incidents happen with the positioning spud of a backhoe dredger,the hull loses stability,heels significantly,and may even capsize under extreme conditions.Coupling the hydrodynamics and spud vibrations,this paper...When incidents happen with the positioning spud of a backhoe dredger,the hull loses stability,heels significantly,and may even capsize under extreme conditions.Coupling the hydrodynamics and spud vibrations,this paper investigates the dynamic stability of a backhoe dredger after spud failure based on the time domain method.The maximum dynamic heeling angle verifies the stability of the backhoe dredger.To identify the influences of environmental load,operating conditions,and spud-soil interactions,numerical motion simulations were conducted in the time domain.The main conclusions on dynamic stability consider the influences of relative environmental and operational factors.This study provides a powerful and efficient approach to analyze the dynamic stability of backhoe dredgers and to design flooding angles.展开更多
The first exploration oil well in any oil block consumes in general more time and cost than the other wells in the same block. Evaluating the drilled wells serves to improve the future operations. This paper evaluates...The first exploration oil well in any oil block consumes in general more time and cost than the other wells in the same block. Evaluating the drilled wells serves to improve the future operations. This paper evaluates the drilled surface section through real field data for the first exploration oil well drilled in one of the oil blocks, in Kurdistan north of Iraq. The surface section of the well was drilled with the conventional method to penetrate many different geological formations with tight intervals. Drilling efficiency and the difficulties encountered are discussed and explained using various data sources. All daily drilling reports concerning a specific interval were studied. This includes weight on bit, string rotation, mud pump flow and penetration rate. Evaluation was carried out by analyzing the used controllable drilling parameters with the formations features. Penetration of the Pila Spi formation (Middle Eocene) was the most difficult formation in the drilled section. Microsoft Office 365 Pro Plus used in making graphs and Excel tables. Evaluations showed that the conventional technology used left many negative effects, like increase in None Productive Time NPT, cost and ground water pollution. Simultaneous Casing Drilling method proposed as an alternative method for the future campaign.展开更多
文摘论文介绍了国内自主设计的5 000 k W绞刀功率自航绞吸船——"天鲲号"的性能概况,分别对总体布置、动力系统配置、柔性钢桩台车定位系统、智能化集成控制系统和三缆定位系统等核心关键技术应用研究进行了阐述。通过对本船核心关键技术的研发,实现了多种核心关键技术的最佳匹配组合,对提高我国大型疏浚船舶设计技术的总体水平将起到促进作用,对今后研发设计同类型船舶有一定借鉴意义。
文摘When incidents happen with the positioning spud of a backhoe dredger,the hull loses stability,heels significantly,and may even capsize under extreme conditions.Coupling the hydrodynamics and spud vibrations,this paper investigates the dynamic stability of a backhoe dredger after spud failure based on the time domain method.The maximum dynamic heeling angle verifies the stability of the backhoe dredger.To identify the influences of environmental load,operating conditions,and spud-soil interactions,numerical motion simulations were conducted in the time domain.The main conclusions on dynamic stability consider the influences of relative environmental and operational factors.This study provides a powerful and efficient approach to analyze the dynamic stability of backhoe dredgers and to design flooding angles.
文摘The first exploration oil well in any oil block consumes in general more time and cost than the other wells in the same block. Evaluating the drilled wells serves to improve the future operations. This paper evaluates the drilled surface section through real field data for the first exploration oil well drilled in one of the oil blocks, in Kurdistan north of Iraq. The surface section of the well was drilled with the conventional method to penetrate many different geological formations with tight intervals. Drilling efficiency and the difficulties encountered are discussed and explained using various data sources. All daily drilling reports concerning a specific interval were studied. This includes weight on bit, string rotation, mud pump flow and penetration rate. Evaluation was carried out by analyzing the used controllable drilling parameters with the formations features. Penetration of the Pila Spi formation (Middle Eocene) was the most difficult formation in the drilled section. Microsoft Office 365 Pro Plus used in making graphs and Excel tables. Evaluations showed that the conventional technology used left many negative effects, like increase in None Productive Time NPT, cost and ground water pollution. Simultaneous Casing Drilling method proposed as an alternative method for the future campaign.
