科右中旗查干楚鲁矿区钻探施工中护壁堵漏的几点体会

Some Experience of Wall Protection and Leaking Stoppage in Drilling Construction of Qaganqulu Mining Area in Keerqiyouyizhong Banner

摘要:

介绍了科右中旗查干楚鲁矿区钻进中所采取的护壁堵漏技术措施。根据岩层及孔深情况采用了套管护壁堵漏、冲洗液护壁堵漏、水泥封孔护壁堵漏等，收到了良好的效果。特殊岩层护壁所采取的下飞管护壁安全可靠。羧甲基纤维素钠（CMC）+水解聚丙烯酰胺（PHP）低固相泥浆形成的泥皮致密而坚韧，对孔内坍塌、掉块具有较高的抑制功能。钻杆内灌入水泥浆封孔的方法，可根据需要合理调节水灰比及惰性材料的大小，保证了封孔的效益和质量。各种护壁技术均效果明显，可进行推广使用。

Abstract:

The paper introduced the wall protection and leaking stoppage technical measures while drilling in Qaganqulu Mining Area of Keerqiyouyizhong Banner. According to the rock strata condition and the hole depth, wall protection and leaking stoppage by casing, drilling fluid and cementing were adopted with good effect and movable casing was safe and reliable for special rock formations. The tight mud cake formed with low solid-phase mud of sodium carboxymethyl cellulose (CMC) + hydrolyzed polyacrylamide (PHP) could stop block falling. Water cement ratio and inert materials amount were rationally regulated for hole sealing by grouting cement slurry inside the drill pipe to ensure the sealing efficiency and quality. The above various wall protection technologies show obvious effects, they can be widely popularized.