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目前,国内使用的锥形圆螺纹油套管主要采用API改进型螺纹脂来密封。API改进型螺纹脂通常含有铅等其他金属添加剂,这种螺纹脂对环境有较大伤害。然而,一些密封性能优于API改进型螺纹脂且环保的螺纹脂没有得到足够的重视。当前,国际上没有一套通用的螺纹脂密封性能测试的规范程序,传统的模板测试过于简单,不能反映真实情况,而全尺寸测试又代价过大且程序复杂,普及困难。基于此,奥地利石油天然气公司研发了一套新的螺纹脂密封性能测试程序,本测试程序的一大特点是新引进了温度与测试时间对螺纹脂密封性能的影响,忽略了轴向载荷的影响。应用此测试程序对七种环保型螺纹脂及其他类型的螺纹脂进行了密封性能测试,结果环保型螺纹脂的密封性能优于API改进型螺纹脂。
At present, the tapered tapered thread oil bushing mainly used API improved thread grease to seal. API modified thread grease usually contains lead and other metal additives, this thread grease is more harmful to the environment. However, some sealing performance is superior to API-modified thread grease and environmentally-friendly thread grease is not given enough attention. At present, there is no international standard procedure for testing the performance of thread grease sealing. The traditional template testing is too simple and does not reflect the real situation. However, the full-size test is too costly and the procedure is complicated and difficult to popularize. Based on this, Austrian Oil and Natural Gas Company has developed a new thread grease sealing performance test program. One of the major features of this test procedure is the introduction of the new temperature and test time on the performance of the threaded grease seal, ignoring the impact of axial load . This test program was used to test the sealing performance of seven eco-friendly thread fats and other types of thread fats. As a result, the eco-friendly thread fills better sealing performance than API-modified thread fats.