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发明公开
CN104312557A 一种高密度低摩阻钻井液 有权

一种高密度低摩阻钻井液
摘要：
本发明涉及一种高密度低摩阻钻井液，属于油田钻井液技术领域，以水为基液，由钠膨润土1%~3%、碳酸钠为钠膨润土量的5%、氢氧化钠0.5%~1.0%、增黏剂A0.05%~0.1%、降滤失剂B0.2%~0.5%、羧甲基纤维素钠盐0.5%~1.0%、磺化酚醛树脂3.0%~5.0%、磺化褐煤3.0%~5.0%、聚合醇2.0%~3.0%、有机盐C100%，重晶石29.1%~122.2%，按质量百分比混合后经高温老化而得。本发明抗温能力可达135℃，可控密度范围为1.50~1.80g/cm3，高温下钻井液具有良好的流变性和滤失性，具有较低的重晶石含量、泥饼黏滞系数和循环压耗，较高的抑制性能。
摘要（英）：

The invention relates to a high-density low-frictional-resistance drilling fluid, and belongs to the technical field of oil-field drilling fluids. The high-density low-frictional-resistance drilling fluid employs water as a base liquid, and is obtained by mixing 1%-3% by mass of sodium bentonite, sodium carbonate accounting for 5% by mass of sodium bentonite, 0.5%-1.0% by mass of sodium hydroxide, 0.05%-0.1% by mass of tackifier A, 0.2%-0.5% by mass of filtrate reducer B, 0.5%-1.0% by mass of carboxymethyl cellulose sodium salt, 3.0%-5.0% by mass of sulfonated phenolic resin, 3.0%-5.0% by mass of sulfonated lignite, 2.0%-3.0% by mass of polymeric alcohol, 100% by mass of an organic salt C and 29.1%-122.2% by mass of barite, and performing high-temperature ageing. The drilling fluid has the temperature resistance up to 135 DEG C and the controllable density scope of 1.50-1.80 g/cm<3>, has good rheological property and filtration property at a high temperature, and has relatively low barite content, mud cake sticking coefficient and cyclic pressure dissipation, and relatively high inhibition performance.

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