Abstract

The influence of a drilling fluid on the physicomechanical properties of commercial rubbers of two types (RTD-1, RTD-2), which are used as stator coatings for downhole drilling motors, is studied. Prolonged (60 days) contact with a drilling fluid at 25°C is found to increase the stiffness and the coefficient of mechanic loss of rubber. The stability of the properties of RTD-1 rubber during operation in contact with a drilling fluid is shown to be higher than that of RTD-2 rubber. At 80°C, the elastic–hysteresis properties of the rubbers of both types have deteriorated by 30–50%.

中文翻译：

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基于丁二烯-丁腈橡胶的组合物在长期暴露于钻井液后的物理力学性能

摘要

研究了钻井液对用作井下钻井电机定子涂层的两种商业橡胶（RTD-1、RTD-2）的物理力学性能的影响。发现在 25°C 下与钻井液长时间（60 天）接触会增加橡胶的刚度和机械损失系数。RTD-1 橡胶在与钻井液接触的操作过程中性能的稳定性高于 RTD-2 橡胶。在 80°C 时，这两种橡胶的弹性滞后性能都下降了 30-50%。