The lubrication effectiveness of the composite lubricants, 50wt% ethylene bis-stearamide （EBS） wax ＋50wt% graphite and 50wt% EBS wax ＋ 50wt% BN, during the powder metallurgy （P/M） electrostatic die wall lubricat...The lubrication effectiveness of the composite lubricants, 50wt% ethylene bis-stearamide （EBS） wax ＋50wt% graphite and 50wt% EBS wax ＋ 50wt% BN, during the powder metallurgy （P/M） electrostatic die wall lubrication and warm compaction was studied. The results show that the combination of 50wt% EBS wax and 50wt% graphite has excellent lubrication performance, resulting in fairly high green densities, but the mixture of 50wt% EBS wax and 50wt% BN has less beneficial effect. In addition, corresponding die temperatures should be applied when different die wall lubricants are used to achieve the highest green densities.展开更多
为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SM...为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SMD-1的主要颗粒尺寸在3~15μm,加量3%时,钻井液API滤失量从38.5 m L减少到9.4 m L,高温高压滤失量从97.2 m L减少到30.0 m L,80目以细砂床侵入深度从20.0 cm减少到5.1 cm,同时钻井液润滑系数降低82.8%,高温高压粘附系数降低85.7%,封堵、润滑性能良好。在胜利油田滨425区块X138井进行了现场应用,应用井段井壁稳定,钻井液滤失量降低78.6%,润滑系数降低80.0%,封堵性和润滑性能突出,有效解决了井壁失稳及裂缝漏失问题。展开更多
基金This work was financially supported by the National High-Tech Research and Development Program of China (863 Program, No.2001AA337010)
文摘The lubrication effectiveness of the composite lubricants, 50wt% ethylene bis-stearamide （EBS） wax ＋50wt% graphite and 50wt% EBS wax ＋ 50wt% BN, during the powder metallurgy （P/M） electrostatic die wall lubrication and warm compaction was studied. The results show that the combination of 50wt% EBS wax and 50wt% graphite has excellent lubrication performance, resulting in fairly high green densities, but the mixture of 50wt% EBS wax and 50wt% BN has less beneficial effect. In addition, corresponding die temperatures should be applied when different die wall lubricants are used to achieve the highest green densities.
文摘为解决特低渗油藏细小空隙的封堵难题,减轻惰性封堵材料对钻井液润滑性造成的伤害,选用钻井液用纳米乳液作为外相,复合石墨微粉作为内相,在基材润湿剂、增溶剂的协同作用下,通过球磨分散工艺制备了一种石墨基复合材料SMD-1。研究表明,SMD-1的主要颗粒尺寸在3~15μm,加量3%时,钻井液API滤失量从38.5 m L减少到9.4 m L,高温高压滤失量从97.2 m L减少到30.0 m L,80目以细砂床侵入深度从20.0 cm减少到5.1 cm,同时钻井液润滑系数降低82.8%,高温高压粘附系数降低85.7%,封堵、润滑性能良好。在胜利油田滨425区块X138井进行了现场应用,应用井段井壁稳定,钻井液滤失量降低78.6%,润滑系数降低80.0%,封堵性和润滑性能突出,有效解决了井壁失稳及裂缝漏失问题。
