抽油杆中性点的计算方法研究  

CALCULATION METHOD OF NEUTRAL POINT OF PUMPING ROD

作　　者：马建杰[1] 杨海滨[2] 李汉周[1] 戴鑫[1] 

机构地区：[1]江苏油田工程院 [2]江苏油田科技处

出　　处：《钻采工艺》2011年第4期63-65,5-6,共3页Drilling & Production Technology

摘　　要：在有杆抽油井防偏磨及杆柱设计中,抽油杆中性点的计算是非常重要的。文章考虑了抽油杆下行过程所受的各种阻力,对抽油杆在井液中所受的浮力采用了新的计算方法,计算了抽油杆的惯性载荷和杆液摩擦力的最大值,得到了中性点的计算公式,并结合实际井下力学测试数据对建立的模型进行了修正,得到了中性点计算的修正系数计算公式,使建立的模型更加符合现场实际情况。The calculation of pumping rod neutral point is very important in the design of pumping rod.Through considering all kinds of resistances acted on pumping rod during the down stroke,calculating the buoyancy of pumping rod in drilling fluid by using new calculation method and the maximum of inertial load of pumping rod and friction between rod and fluid,a new calculation model of neutral point was obtained.Combined with actual measurement data in down hole,the model was amended,and the formula of calculating correction factor of pumping rod neutral point was got.

关 键 词：抽油杆 受力分析 中性点 上顶力 

分 类 号：TE933.2[石油与天然气工程—石油机械设备]