一种钻井液用高效抗磨润滑剂

长水平井段高摩阻扭矩及深井高温高压环境，对钻井液润滑剂的润滑抗磨能力提出了更高的要求。传统钻井液用润滑剂难以满足上述技术要求。基于“固-液”协同高效润滑技术思路，优选改性植物油MVO-3、改性可膨胀石墨GIC，结合分散剂、乳化剂的优选及制备条件的优化，研制出了一种高效抗磨润滑剂SDL-1。评价结果表明，5%淡水基浆、4%盐水浆中加入0.5% SDL-1时，其润滑系数降低率分别为不小于85%、大于70%。SDL-1与现场钻井液的配伍性良好，抗温达150℃，起泡率低，且荧光级别小于5级。销-盘式摩擦磨损实验结果表明，SDL-1的抗磨耐磨效果优良，润滑持效性较好，可有效缓解或解决复杂井高摩阻扭矩技术难题，具有良好的推广应用价值。 

A High-Performance Drilling Fluid Anti-Wear Lubricant

In horizontal drilling, high friction, high torque and HTHP impose much more rigorous requirements on the lubricity and anti-wear capacity of drilling fluid lubricants. Conventional drilling fluid lubricants are not able to satisfy these requirements. A highperformance anti-wear lubricant SDL-1, has been developed based on "solid-liquid" synergism. A modifed vegetable oil MVO-3, a modifed expandable graphite GIC have been used with dispersant, emulsifer in the development of SDL-1. Laboratory evaluation experiment showed that 5% fresh water bentonite mud treated with 0.5% SDL-1 has coeffcient of friction reduced by at least 85%, and 4% brine mud treated with 0.5% SDL-1 has coeffcient of friction reduced by at least 70%. SDL-1 is well compatible with drilled fluids used in actual drilling operations. It functions normally at 150℃, has low foaming capacity. The fluorescence level of SDL-1 is less than 5. Pin-disc friction and wear test results showed that SDL-1, as a lubricant that is worth spreading, has excellent anti-wear capacity and good lubricity, and is able to effectively mitigate or resolve high friction high torque problems encountered in complex well drilling.