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:
Feb. 23, 2021
Filed:
Oct. 31, 2017
Petrochina Company Limited, Beijing, CN;
Youzhi Zheng, Beijing, CN;
Bo Kong, Beijing, CN;
Jie Li, Beijing, CN;
Huiyun Ma, Beijing, CN;
Yu Sang, Beijing, CN;
Tao Yang, Beijing, CN;
Minghua Xie, Beijing, CN;
Libin Jiao, Beijing, CN;
Fuyun Wang, Beijing, CN;
Hongwei Xia, Beijing, CN;
Jiang Yu, Beijing, CN;
Qiyan Tan, Beijing, CN;
Congjing Liu, Beijing, CN;
Ji Chen, Beijing, CN;
Qiang Fu, Beijing, CN;
Xiaoli Zhao, Beijing, CN;
Fenglin Guo, Beijing, CN;
Yong Wu, Beijing, CN;
Yiguo He, Beijing, CN;
Bin Wang, Beijing, CN;
Xiaojiao Wang, Beijing, CN;
PetroChina Company Limited, Beijing, CN;
Abstract
The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method and device of the present invention provide a universal comparing platform for research on hardened cement modification as well as examination of domestic and foreign special cement slurry systems, which is of great significance in evaluation of well hole integrity and well life.