The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2025
Filed:
May. 10, 2023
China National Petroleum Corporation, Beijing, CN;
Cnpc Engineering Technology R&d Company Limited, Beijing, CN;
Hua Zhang, Beijing, CN;
Jianzhou Jin, Beijing, CN;
Yongjin Yu, Beijing, CN;
Congfeng Qu, Beijing, CN;
Fengzhong Qi, Beijing, CN;
Ming Xu, Beijing, CN;
Shuoqiong Liu, Beijing, CN;
Zhaohui Wang, Beijing, CN;
Yuchao Guo, Beijing, CN;
Jiliang Liu, Beijing, CN;
Bin Lyu, Beijing, CN;
Zhiwei Ding, Beijing, CN;
Chi Zhang, Beijing, CN;
Zishuai Liu, Beijing, CN;
Hongfei Ji, Beijing, CN;
Xiujian Xia, Beijing, CN;
Yong Li, Beijing, CN;
Chongfeng Zhou, Beijing, CN;
Xiaobing Zhang, Beijing, CN;
China National Petroleum Corporation;, Beijing, CN;
CNPC Engineering Technology R&D Company Limited, Beijing, CN;
Abstract
A high-strength Portland cement slurry for ultra-high-temperature cementing, a preparation method therefor and an application thereof. In parts by weight, the composition of the cement slurry comprises: 100 parts of Portland cement, 4-6 parts of a high temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersant, 1-3 parts of a fluid loss reducer, 0.5-2.5 parts of a retarder and 0.2-0.5 parts of a defoamer; the high-temperature reinforcing material is a combination of acid-washed quartz sand, metakaolin and aluminum sulfate, a combination of acid-washed quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of acid-washed quartz sand, metakaolin, feldspar and calcium nitrite. The cement slurry has good settling stability, rapid strength development in low temperatures, high compressive strength of cement stone at a high temperature of 600° C., and stable development of long-term high-temperature compressive strength.