摘要
套管磨损作为油田生产中普遍存在的问题,越来越得到各油田生产单位的重视。首先介绍了影响井下套管磨损程度的主要因素,从分析钻柱在受拉和受压时与套管之间的接触力、井下套管磨损程度及套管剩余强度入手,系统介绍了井下套管磨损程度,环向应力和套管的抗挤毁强度计算方法,以及套管磨损后的剩余强度分析方法。将金属的磨损量和磨损所消耗的能量联系起来,通过"磨损效率"模型来预测井下套管的磨损程度。内壁磨损套管横截面形状多为月牙形,给出了月牙形磨损套管剩余壁厚的计算公式,以P110套管为例,计算了P110套管在工作一定时间后的剩余壁厚和剩余强度。
Casing wear, a universal problem existing in the production of oilfield, gets more and more attention in oilfield. This paper introduces some major factors impacting casing wear. Starting with analysis of the contact force between the casing and drill string, degree of casing wear and residual strengths, this paper introduced the method of calculating casing wear, circumferential stress, casing collapsing strength, and the residual strength after wearing. By relating the casing wear and the energy consumed during wear, the casing wear was predicted using ＂wear efficiency＂ model. Worn casing usually has a crescent cross sec tional shape. The equation to calculate the remaining thickness for casing was provided. The remaining thickness and residual strength of P110 casing after wearing was calculated as an example.
出处
《石油钻探技术》
CAS
北大核心
2008年第2期14-17,共4页
Petroleum Drilling Techniques
关键词
套管
磨损
受力分析
抗压强度
剩余壁厚
casing
wear
force analysis
compressive strength
remaining thickness
