钻具试样的磁记忆检测技术研究

Research on Magnetic Memory Testing Technology of Samples of Drilling Tools

摘要: 钻具工件的在役状态监测是钻井工业关注的问题。对钻具在役状态的检测、监测以及寿命预测是保障石油工业钻采顺利进行的首要条件。提出了用磁记忆的方法来检测钻具的在役状态。试验设计了钻具试样检测装置和检测方法，截取钻具试样进行拉伸和破坏试验，在试验过程中检测磁记忆信号的特征。试验初步建立了磁记忆信号与钻具试样应力集中之间的关系。

Abstract: It is well known that the status of the drilling tools is an important problem in the oil drilling industry. A new nondestructive testing method, metal magnetic memory(MMM) testing, was presented. A new scientific type of test device and test method was designed in experimental research. The experiment was mainly to gain the characteristics of magnetic memory signals of the samples in drilling tool by static tension and pressing crack experiment. Through the experimental research, the relationship between stress value and magnetic memory signal was established.