【摘要】 分析了钻具腐蚀的原因。为了缓解钻具腐蚀,根据金属防腐原理,除采用传统的钻井液处理方法外,对钻具表面进行磷化处理,使其具有抗腐蚀能力,更有效果。其中,加锰改良的低锌磷化工艺具有磷化反应速度快、处理温度低、磷化膜热稳定性好等优点,已广泛推广应用。文章重点论述了加速钻具表面磷化速度和提高磷化层质量的3种化学方法和物理方法。更多还原

【Abstract】 The corrosion causes of oil drilling tools are analyzed.According to the mechanism of anti-corrosion of the metals,the effect of phosphate treatment on drilling tools are analyzed as well as generalizing the present anti-corrosive methods by reducing the corrosive characteristics of drilling fluid.The lower-content zinc phosphating with manganese have been widely used for its characteristics of rapidly phosphating,low temperature process and good high-temperature resistance of the phosphating coating.To accelerate the phosphating rate of the drilling tools and to improve the quality of phosphating coatings,chemical and physical techniques have been discussed in detail,together with their working principles presented herein.更多还原