Experimental on the Residual Life of Oil Tubing of J55 Material
Experimental on the Residual Life of Oil Tubing of J55 Material
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DOI：
10.4028/www.scientific.net/amr.562-564.326
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发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
Jie Li;D. Yao;Peng Xu;Jianchun Fan;L. Cui
中科院分区：
文献类型：
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作者：
Jie Li;D. Yao;Peng Xu;Jianchun Fan;L. Cui
油管作为油井中的一种特殊管道，具有工作效率高、载荷大的特点。油管失效是油田开发生产过程中经常发生的事故，由于杆管偏心摩擦引起的失效事故占很大比例，会带来严重的经济损失。研究含缺陷油管的疲劳断裂情况和临界偏心摩擦深度具有重要意义。选用油田常用的Ф73*5.51规格的J55材料油管作为半椭圆表面裂纹拉伸试样源。通过拉伸试验研究了不同偏心摩阻比油管的剩余寿命。确定了油管剩余寿命满足检泵周期的临界偏心摩阻百分率，为制定合理的油管失效标准提供了参考。从模拟偏心摩擦深度占壁厚30%~50%的J55材料油管拉伸试验结果可知，J55材料油管的临界摩擦深度为壁厚的43.0%。
Oil tubing works as a special pipeline in oil well has the characteristic of high work efficiency and under high loading. Oil tubing failure which commonly happens during the course of oilfield development and production can bring severe economic loss because of the failure accidents caused by the eccentric friction of rods and tubing account for a great percentage. It has a great of significance to study on the fatigue fracture situation and the critical eccentric friction depth of tubing with defects. Oil tubings of J55 material with the specification of Ф73*5.51 commonly used in oilfields were chosen to be the source of semi-ellipse surface crack tensile specimens. Residual life of oil tubing with different eccentric friction percentages was studied through tensile tests. The critical eccentric friction percentage under which the residual life of oil tubing can meet pump detection period was determined, which provides reference for making a reasonable failure standard of tubing. From the tensile test results of the oil tubings of J55 material simulating the condition that the eccentric friction depth accounts for 30% ~ 50% of the wall thickness, the critical friction depth of oil tubing of J55 material is 43.0% of the wall thickness.