The directional crossing drilling works were applied in the West East gas pipeline (WEGTP) project. The main researchs on the directional crossing drilling include:(1)to analyze the forces applied on the drilling tool...The directional crossing drilling works were applied in the West East gas pipeline (WEGTP) project. The main researchs on the directional crossing drilling include:(1)to analyze the forces applied on the drilling tool and the failure mechanism in order to obtain the proper configuration of the drilling tool and solve the failure prevention;(2)to analyze the existing mud, to propose a viable mud composition;(3)in respect of mud mixing and environmental protection, to develop a quick cycloning mud hydration and recycling device;(4)to develop a interface picture software for direction controlling measured parameter to improve directional drilling accuracy; (5) to develop an electronic search software incorporating large amount of construction specifications and mud compositions, used for construction. In this paper the first one of the above mentioned points is introduced, including existing problems with directional drilling, optimization of the drilling tool, analysis of drill collar fracture failure, research on stress scattering structure of drilling tool thread and thread sticking prevention measures, etc.展开更多
东海某海底管道是油气外输的主干线,该管道由于有球型法兰自投产后未开展相应智能内检测工作,为评估该条管道的内腐蚀状态,参考NACE标准开展相关内腐蚀直接评价研究。为此,采用OLGA软件对管道内流动状态进行了分析,基于室内腐蚀实验对De...东海某海底管道是油气外输的主干线,该管道由于有球型法兰自投产后未开展相应智能内检测工作,为评估该条管道的内腐蚀状态,参考NACE标准开展相关内腐蚀直接评价研究。为此,采用OLGA软件对管道内流动状态进行了分析,基于室内腐蚀实验对De waard 95腐蚀速率预测模型进行了改进,并将内腐蚀直接评价结果与现场泡沫涡流内检测结果进行了对比,同时进行了管道剩余强度评价。结果显示:该条海管共有366处高风险位置,最大腐蚀速率出现在6.933?km处为0.6508?mm/a,且腐蚀速率沿程的波动较大;改进后的内腐蚀速率预测模型精度能满足工程需求,内检测数据也进一步佐证了内腐蚀直接评价技术的可靠性,平均误差为5.29%;腐蚀后的管道剩余强度能满足当前安全运行的需要,建议后续加强腐蚀监测工作。展开更多
文摘The directional crossing drilling works were applied in the West East gas pipeline (WEGTP) project. The main researchs on the directional crossing drilling include:(1)to analyze the forces applied on the drilling tool and the failure mechanism in order to obtain the proper configuration of the drilling tool and solve the failure prevention;(2)to analyze the existing mud, to propose a viable mud composition;(3)in respect of mud mixing and environmental protection, to develop a quick cycloning mud hydration and recycling device;(4)to develop a interface picture software for direction controlling measured parameter to improve directional drilling accuracy; (5) to develop an electronic search software incorporating large amount of construction specifications and mud compositions, used for construction. In this paper the first one of the above mentioned points is introduced, including existing problems with directional drilling, optimization of the drilling tool, analysis of drill collar fracture failure, research on stress scattering structure of drilling tool thread and thread sticking prevention measures, etc.
文摘东海某海底管道是油气外输的主干线,该管道由于有球型法兰自投产后未开展相应智能内检测工作,为评估该条管道的内腐蚀状态,参考NACE标准开展相关内腐蚀直接评价研究。为此,采用OLGA软件对管道内流动状态进行了分析,基于室内腐蚀实验对De waard 95腐蚀速率预测模型进行了改进,并将内腐蚀直接评价结果与现场泡沫涡流内检测结果进行了对比,同时进行了管道剩余强度评价。结果显示:该条海管共有366处高风险位置,最大腐蚀速率出现在6.933?km处为0.6508?mm/a,且腐蚀速率沿程的波动较大;改进后的内腐蚀速率预测模型精度能满足工程需求,内检测数据也进一步佐证了内腐蚀直接评价技术的可靠性,平均误差为5.29%;腐蚀后的管道剩余强度能满足当前安全运行的需要,建议后续加强腐蚀监测工作。
