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大庆朝阳沟油田，上部地层易造浆，下部地层易剥落、掉块。钻斜直井更易开塌，所以要求钻井液防塌能力强、润滑性能好、携岩能力强。钻井二公司试验了以FA-578和XY-38为主的两性离子聚合物钻井液体系，取得了较好效果。通过3口井的现场试验，证明该体系对钻屑包被较好，使造浆得到控制；携岩能力强，起下钻畅通；润滑性能好，未发生粘卡；防止了井塌；稳定性好，便于维护、处理。结果3口试验井的平均机械钻速比对比井提高4m／h，完井周期提前4．38d。
Daqing Chaoyanggou oil field, the upper formation easy to pulp, the lower formation easily flaking off the block. Drilling oblique hole easier to open collapse, drilling fluids require anti-collapse ability, good lubrication performance, carrying capacity and rock. Drilling Company II tested the zwitterionic polymer drilling fluid system based on FA-578 and XY-38 and achieved good results. Through the field test of three wells, it is proved that the system has better coating of drill cuttings and control of the slurrying; the ability to carry rock is strong, the drill-off is smooth; the lubricating performance is good and no sticking occurs; Good sex, easy to maintain, handle. Results The average ROP of 3 test wells was 4m / h higher than that of comparison well, and the completion cycle advanced 4.38d.