US 12,391,861 B2
Cement slurry system, preparation method therefor and use thereof
Jianzhou Jin, Beijing (CN); Yuchao Guo, Beijing (CN); Hong Yue, Chengdu (CN); Youcheng Zheng, Chengdu (CN); Hua Zhang, Beijing (CN); Lili Chen, Chengdu (CN); Shuoqiong Liu, Beijing (CN); Wei Li, Chengdu (CN); Yong Ma, Chengdu (CN); Feng Zhou, Chengdu (CN); Chengquan Li, Chengdu (CN); Yao Wang, Chengdu (CN); Yongjin Yu, Beijing (CN); Congfeng Qu, Beijing (CN); Fengzhong Qi, Beijing (CN); Yong Li, Beijing (CN); Youzhi Zheng, Chengdu (CN); Jianhua Guo, Chengdu (CN); Ming Xu, Beijing (CN); Zhaohui Wang, Beijing (CN); Chi Zhang, Beijing (CN); Zishuai Liu, Beijing (CN); Xiaobing Zhang, Beijing (CN); Hongfei Ji, Beijing (CN); Shunping Zhang, Beijing (CN); and Rui Zheng, Beijing (CN)
Assigned to China National Petroleum Corporation, Beijing (CN); and CNPC Engineering Technology R&D Company Limited, Beijing (CN)
Appl. No. 18/571,041
Filed by China National Petroleum Corporation, Beijing (CN); and CNPC Engineering Technology R&D Company Limited, Beijing (CN)
PCT Filed Jun. 30, 2022, PCT No. PCT/CN2022/102831
§ 371(c)(1), (2) Date Dec. 15, 2023,
PCT Pub. No. WO2023/123962, PCT Pub. Date Jul. 6, 2023.
Claims priority of application No. 202111680322.1 (CN), filed on Dec. 30, 2021.
Prior Publication US 2024/0228858 A1, Jul. 11, 2024
Int. Cl. C09K 8/467 (2006.01); C04B 40/00 (2006.01); C04B 103/50 (2006.01)
CPC C09K 8/467 (2013.01) [C04B 40/0039 (2013.01); C04B 2103/50 (2013.01); C04B 2201/20 (2013.01); C04B 2201/50 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A cement slurry system prepared from a cement slurry composition comprising: 100 parts by weight of cement, 1-5 parts by weight of an early strength material, 0.5-40 parts by weight of a strength stabilizer, 0-120 parts by weight of a density modifier, 0-2 parts by weight of a suspension stabilizer, 0-2 parts by weight of a dispersing agent II, 2-5 parts by weight of a filtrate reducer, 0.1-2 parts by weight of a retarder, 0.1-0.5 part by weight of a defoaming agent and 40-80 parts by weight of water;
wherein the early strength material contains an aluminum salt, a sodium salt, a crystal whisker, an inorganic mineral, and a dispersing agent I; and the weight ratio of the aluminum salt, the sodium salt, the crystal whisker, the inorganic mineral and the dispersing agent I is (1-3):(1-3):(1-4):(1-8):1;
wherein the cement slurry system has an applicable temperature within a range from 30° C. to 150° C. and a temperature difference within a range from 30° C. to 120° C.;
wherein the cement slurry system has a density within a range from 1.9 g/cm3 to 2.4 g/cm3; a fluidity more than or equal to 22 cm; an API water loss less than 50 ml; a free water content being 0; a top set cement compressive strength after 24 hours being more than or equal to 3 MPa; and a thickening time more than or equal to 180 min.