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荆丘地区为了防止2750～3000m膏盐地层塑性蠕动挤毁套管，采用了双层组合套管新工艺。根据地层岩性和双层组合套管施工的特点，要求钻井液防卡、防塌及抗电介质污染。为此选用了PAC141－NPAN—SMP聚合物防塌钻井液体系。钻进中用液体润滑剂，完井时用固体润滑剂塑料小球；防塌剂用SBI—1。施工13口井，均未发生过压差卡钻；除2口井在上部地层因未灌浆井塌外，其它都未发生过井塌；一次电测成功率达84．6％；对油层还有保护作用。与32口井深相当的对比井相比，一次电测成功率提高31．5个百分点，处理复杂情况和事故时间减少9．6个百分点，钻井周期缩短35．47％，建井周期缩短28．44％。
Jiuchu region in order to prevent the 2750 ~ 3000m gypsum salt formations of plastic peristalsis collapse casing, using a new double-layer composite casing technology. According to the characteristics of formation lithology and double-layer casing construction, drilling fluid anti-jamming, anti-collapse and anti-dielectric pollution are required. PAC141-NPAN-SMP polymer anti-collapse drilling fluid system was selected for this purpose. Drilling with liquid lubricant, completion of the solid lubricant with plastic beads; anti-collapse agent with SBI-1. None of the 13 wells were undergone differential calorie jamming. Except for the two wells in the upper stratum, no other well had been collapsed due to un-grouted collapses. The success rate of primary electrical measurements was 84.6% Have a protective effect. Compared with 32 well-matched control wells, the success rate of one electrical measurement increased by 31.5 percentage points, the processing complexity and accident time decreased by 9.6 percentage points, the drilling cycle was shortened by 35.47% and the drilling cycle was shortened by 28%. 44%.