▎ 摘　　要

NOVELTY - Cement slurry system comprises cement, particulate aggregates, active powders, nano-filling materials, toughening materials, early strength agents, water reducers and water. USE - The cement slurry system is useful in the drilling process in the metal-free metal sleeve pipe cementing process (claimed). ADVANTAGE - The cement slurry system is economical and has good compatibility with various admixtures, stable performance, has high compressive strength and tensile strength, strong toughness, and meets the requirements of oil and gas well cementing without metal shell, and significantly improves the deformation resistance and impact resistance of cement stone. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the cement slurry system, comprising mixing the cement, particle aggregate, active powder, nanometer filling material, toughening material, early strength agent and water reducing agent, and mixing the obtained mixture with water.