Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-density cement paste for well cementation and preparation method thereof
The invention provides low-density cement paste for well cementation and a preparation method thereof. The low-density cement paste for well cementation comprises the following components in parts by weight: 25-30 parts of oil well cement, 35-45 parts of fly ash, 20-30 parts of slag, 5-10 parts of silica fume, 2-5 parts of a stabilizer, 2-4 parts of an activator, 1-2.5 parts of a fluid loss agent, 0.05-0.2 part of a retarder and 115-150 parts of water. The quick adsorbability of calcined gypsum, silica fume and G-grade oil well cement with water is utilized to form a net structure, the fly ash and slag powder particles are bound and supported, the fly ash and slag powder particles are infiltrated, swelled and cracked for a certain period of time in the later period, more active bonds capable of participating in hydration reaction in the deep layers of the particles are expanded, and the hydration reaction effect is improved. More free water is bound and combined to participate in the hydration reaction of the structure, so that the structural stability of the low-density cement slurry and the non-collapse and non-shrinkage of the solid volume are ensured.
本发明提供了一种固井用低密度水泥浆及其制备方法，固井用低密度水泥浆包括以下重量份数的组分：油井水泥25‑30份，粉煤灰35‑45份，矿渣20‑30份，微硅粉5‑10份，稳定剂2‑5份，激活剂2‑4份，降失水剂1‑2.5份，缓凝剂0.05‑0.2份，水115‑150份。本发明利用熟石膏、微硅粉和G级油井水泥与水的快速吸附性，形成网状结构，对粉煤灰和矿渣粉颗粒形成束缚与支撑，后期粉煤灰和矿渣粉颗粒经过一定时间的浸润、溶胀、裂解，更大量展开颗粒深层的可参与水化反应的活性键，束缚和结合更多的自由水参与进结构的水化反应中，确保了低密度水泥浆浆体的结构稳定和固体体积的不坍塌、不收缩。
Low-density cement paste for well cementation and preparation method thereof
The invention provides low-density cement paste for well cementation and a preparation method thereof. The low-density cement paste for well cementation comprises the following components in parts by weight: 25-30 parts of oil well cement, 35-45 parts of fly ash, 20-30 parts of slag, 5-10 parts of silica fume, 2-5 parts of a stabilizer, 2-4 parts of an activator, 1-2.5 parts of a fluid loss agent, 0.05-0.2 part of a retarder and 115-150 parts of water. The quick adsorbability of calcined gypsum, silica fume and G-grade oil well cement with water is utilized to form a net structure, the fly ash and slag powder particles are bound and supported, the fly ash and slag powder particles are infiltrated, swelled and cracked for a certain period of time in the later period, more active bonds capable of participating in hydration reaction in the deep layers of the particles are expanded, and the hydration reaction effect is improved. More free water is bound and combined to participate in the hydration reaction of the structure, so that the structural stability of the low-density cement slurry and the non-collapse and non-shrinkage of the solid volume are ensured.
本发明提供了一种固井用低密度水泥浆及其制备方法，固井用低密度水泥浆包括以下重量份数的组分：油井水泥25‑30份，粉煤灰35‑45份，矿渣20‑30份，微硅粉5‑10份，稳定剂2‑5份，激活剂2‑4份，降失水剂1‑2.5份，缓凝剂0.05‑0.2份，水115‑150份。本发明利用熟石膏、微硅粉和G级油井水泥与水的快速吸附性，形成网状结构，对粉煤灰和矿渣粉颗粒形成束缚与支撑，后期粉煤灰和矿渣粉颗粒经过一定时间的浸润、溶胀、裂解，更大量展开颗粒深层的可参与水化反应的活性键，束缚和结合更多的自由水参与进结构的水化反应中，确保了低密度水泥浆浆体的结构稳定和固体体积的不坍塌、不收缩。
Low-density cement paste for well cementation and preparation method thereof
一种固井用低密度水泥浆及其制备方法
WEI ZHOUSHENG (Autor:in) / JIA ZHI (Autor:in) / ZHOU BING (Autor:in) / ZENG YONG (Autor:in) / LI BO (Autor:in) / MEI MINGJIA (Autor:in) / ZHU HONG (Autor:in) / ZHOU JING (Autor:in) / LUO LIEQIANG (Autor:in) / ZHAO DAN (Autor:in)
16.06.2023
Patent
Elektronische Ressource
Chinesisch
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