Abstract: On the basis of analysing the slotted pipes available by means of the contrast experiments with liquid flow,which aim at analysing and comparing the ability for different slottedpipes to prevent sand from flowing into them,and the pressure drop of liquid through them,we develop a optimum structure and size of the slotted pipe. Taking the maximum oil production and reasonable sand production as the first objective and,the lowest cost of the slottedpipe per meter as the second objective,we use two steps of computer optimized prograrn todesign a new type of composite slotted pipe. With the same condition,the pressure drawdownof liquid through the new type of pipe is 10%～20% lower than other types of slotted pipes,and sand control capacity increase by 10%.

Key words: slotted pipe, contrast experiment, flowing pressure, mathematical model, optimized design

摘要： 应用液体流动的对比实验,对筛管防砂效果以及流阻损失进行分析比较,确定出合理的缝形结构尺寸;采用计算机两级优化的设计方法,以最大单井产量和合理的出砂量为第一级目标函数,以单位长度最小经济造价为第二级目标函数,研制出了全新的组合窄缝筛管.在同等条件下,其流动阻力降低10%～12%,防砂效果提高10%左右.各油田可根据其具体情况进行设计和制造.

关键词: 筛管, 对比试验, 流动压力, 数学模型, 优化设计