高分子聚合物无固相冲洗液在牛头山深钻CUSD3孔的应用研究

牛头山深钻CUSD3孔是中核集团龙灿工程“相山基础地质研究”项目实施的第二个科学深钻钻孔。该孔钻遇的地层包括碎斑熔岩、流纹英安岩、片岩、板岩及千枚岩。地层裂隙发育、破碎、掉块严重，孔壁稳定性差。根据钻进施工中出现的难题，选用了高分子无固相冲洗液。应用表明，该冲洗液具有护壁性好、流动性好、减阻效果好等特点，取得了良好的效果，有效地保证该钻孔的顺利完工。

Research and Application of High-molecular Polymers Solid-free Drilling Fluid in Niutoushan Deep Drilling Hole CUSD3

Niutoushan deep drilling CUSD3 belongs to the longcan engineering of china national nuclear corporation, which is second deep drilling of xiangshan fundamental geological research project. Drilling strata includes porphyroclastic lava, rhyolitic dacite, schist, slate and phyllite. The Strata is broken, fracture developed, and severe sloughing, resulting in poor stability of hole wall. According to the problems in drilling construction, select the Polymeric solid free drilling fluid, which has the characteristics of good wall protection, good fluidity, and high efficiency of reducing obstacle. The application in Niutoushan deep drilling CUSD3 achieved good effect, and effectively ensure the scientific drilling successfully completed.