Development and Application of Drilling Fluid Extreme-Pressure Lubricant JM-1
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摘要: 针对目前钻井液常规润滑剂极压膜强度低、抗温性能差、润滑持效性差等问题,首先将植物油和含硫、磷、钼等活性元素的有机钼化合物反应,合成出有机钼减摩剂,然后将其与10#白油进行复配,制备出了极压润滑剂JM-1。性能评价结果表明,JM-1加量为1.5%时,极压润滑系数降低率大于65%,有较高的极压膜强度,润滑持效性好,抗温达150℃,无毒,无污染,荧光级别较低,与钻井液体系配伍性良好,不引起钻井液发泡。该润滑剂在大斜度定向井腰1-1HF井和北港1井进行了现场应用。在腰1-1HF井使用了该润滑剂后,水平段提升摩阻降低50%,全井起下钻、下套管顺利。北港1井后期划眼复杂期间使用该润滑剂,钻井液的润滑性能得到了明显改善,井眼垮塌现象也得到了有效抑制。Abstract: Common drilling fluid lubricants have problems such as low film strengths at extreme pressure, poor stability at elevated temperatures, and short lubricity persistence in extreme conditions. An extreme pressure lubricant, JM-1, has been developed by mixing an organic molybdenum friction reducer and the 10# white oil. The organic molybdenum friction reducer was made by reacting vegetable oils with organicmolybdenum containing sulfur, phosphorus and molybdenum. The percent reduction in friction at extreme conditions was 65% at 1.5% JM-1 concentration. The evaluation showed that the film has high strength, the lubricity lasts long, and the lubricity remains stable at 150℃. JM-1 is non-toxic, pollution-free, and has low fluorescence. Drilling fluids treated with JM-1 do not foam. JM-1 has been tried in the highly deviated directional well Yao1-1HF, in which the friction in the horizontal section was reduced by 50%, and tripping and casing running were conducted smoothly, and well Beigang1, in which reaming was done much easier after using JM-1 treated drilling fluid.
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