双金属复合管管流摩阻分析

随着石油天然气勘探开发的发展,油气开采面临的腐蚀环境越来越恶劣,使石油管柱的腐蚀问题越来越突出,并直接影响到油气田勘探开发的经济效益。双金属复合管防腐性能可靠,材料成本较低,内径比目前使用的碳钢石油管内径小,其管流摩阻及与之相关的使用工艺性能可能发生改变。为此,对双金属复合管的管流摩阻问题进行了研究,并对其作为采气管和天然气输送管的相关工艺参数进行了分析计算。研究结果表明:在相同压降情况下,复合管输送量更大,输送距离更长;复合管内径的减小一般不会引起管流摩阻的增加,当内管厚度不大时,复合管的流动摩阻更小。双金属复合管不仅防腐性能可靠,而且水力摩阻小,是石油管防腐工程的极佳选择,值得推广应用。

Analysis of Pressure Drop of Flow in Dual-Metal Pipe

With the development of exploration and exploitation of oil and gas,the corrosive environment faced is worsening,making pipe corrosion an increasingly striking problem and directly affecting the economic efficiency of the oil and gas field.Dual metal pipe,a new reliable technology for corrosion resistance,is a low cost anti-corrosion.Its inner diameter is smaller than that of carbon steel pipe commonly used.Therefore,the pipe flow friction and the performance associated may be different.Studies on the pipe flow friction of dual metal pipe were conducted.The related technical parameters of dual metal pipe for tubing and pipeline were calculated.The results show that the dual metal pipe's transmission distance is longer and its transmission capacity is bigger under same pressure drop;the decrease of the dual metal pipe's inner diameter generally will not increase in the flow friction;the flow friction is even smaller with smaller pipe thickness.Dual metal pipe's corrosion resistance is reliable along with smaller hydraulic friction.It is good for anti-corrosion and is worthy of application.