高温井下低熔点合金储热模块封装及试验

Package and Test of Low-melting Alloy Heat Storage Module in High-Temperature Wellbore

测井仪工作时,其内部电子器件面临着井下高温环境的考验,容易热失效,需采用储热模块进行热控温。以往研究中储热模块的热性能较差,且封装可靠性未经严格验证。为此,首先制备了低熔点合金储热材料并表征其热物性,随后对储热材料采用金属模块化封装,并采用高、低温循环测试以及高温振动测试验证其可靠性,最后将其应用于测井仪中进行温度测试。测试结果表明,低熔点合金的储热能力以及储热速率相比石蜡优势明显,其封装模块不仅顺利通过了严苛的可靠性测试,而且在测井仪温度试验中也反映出较为优异的控温能力,可满足实际测井需求。研究结果可为测井仪在高温环境下工作提供技术参考。

When logging tool is working,its internal electronic devices are facing the high-temperature environment of wellbore,so it is necessary to use heat storage module for thermal control.Previous studies reported poor thermal performance of heat storage module and the packaging reliability was not strictly verified.In this paper,the low-melting alloy heat storage material was prepared and its thermal properties were characterized.Then,metallic modular packaging was conducted for the heat storage material,and high-low temperature loop test and high-temperature vibration test were carried out to verify its reliability.Finally,it was applied in the logging tool to conduct temperature test.The test results show that the low-melting alloy has obvious advantages in heat storage capacity and heat storage rate over paraffin.Its packaging module not only successfully passes the rigorous reliability test,but also reflects relatively excellent temperature control ability in the temperature test of logging tool.The low-melting alloy can meet the actual logging needs.The research results provide technical reference for logging tools in high-temperature environment.