ADDITIVE FOR CEMENT SLURRY FOR WELL AND METHOD FOR PRODUCING SAID ADDITIVE, CEMENT SLURRY FOR WELL, AND CEMENTING METHOD FOR WELL

• Main Authors: MURAKAMI Satoru, OOTA Isao, KIMATA Masaki
• Format: Patent
• Language: English; French; Japanese
• Published: 29.10.2020
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

Provided is an additive for a cement slurry for a well that is capable of suppressing the generation of free water and preventing flotation/separation of low-specific-gravity aggregate while securing sufficient cement strength even at a high temperature. Also provided is a method for producing this additive. This additive for a cement slurry for a well contains an aqueous dispersion of silica and a layered silicate. L'invention fournit un adjuvant pour laitier de ciment pour cheminée à minerai qui tout en assurant une résistance de ciment suffisante, y compris à haute température, limite l'apparition d'une eau libre, et permet d'inhiber la séparation par flottation d'un agrégat de faible densité, et fournit également un procédé de fabrication de cet adjuvant.　Plus précisément, l'invention concerne un adjuvant pour laitier de ciment pour cheminée à minerai qui contient un phyllosilicate et une dispersion liquide aqueuse de silice. 高温下においても、十分なセメント強度を確保しつつ、遊離水の発生を抑え、低比重骨材の浮上分離を抑制することができる坑井用セメントスラリー用添加剤とその製造方法を提供する。　層状珪酸塩及びシリカの水性分散液を含む、坑井用セメントスラリー用添加剤。