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. 29, 2020
Filed:
Jul. 13, 2018
Southwest Petroleum University, Chengdu, CN;
China Academy of Building Research, Beijing, CN;
Cnpc Engineering Technology R&d Company Limited, Beijing, CN;
Xiaowei Cheng, Chengdu, CN;
Dan Qin, Chengdu, CN;
Kaiyuan Mei, Chengdu, CN;
Kaiqiang Liu, Chengdu, CN;
Gaoyin Zhang, Chengdu, CN;
Xianshu Gao, Chengdu, CN;
Jianzhou Jin, Chengdu, CN;
Zhaijun Wen, Chengdu, CN;
Yongjin Yu, Chengdu, CN;
Chunmei Zhang, Chengdu, CN;
Zaoyuan Li, Chengdu, CN;
Xingguo Zhang, Chengdu, CN;
Xiaoyang Guo, Chengdu, CN;
SOUTHWEST PETROLEUM UNIVERSITY, Chengdu, CN;
CHINA ACADEMY OF BUILDING RESEARCH, Beijing, CN;
CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED, Beijing, CN;
Abstract
A method for evaluating the breakage strength of first and second cemented surfaces of well cementation under a dynamic load, includes: producing a rock-set cement-casing composite structure sample; clamping the sample between an incident rod and an output rod of a Hopkinson rod, hitting the incident rod with a conical punch to generate incident waves, enabling the incident waves to pass through the sample to generate reflected waves and projected waves, recording dynamic strain signals of incident waves, reflected waves and projected waves, and converting the dynamic strain signals into electrical signals and transmitting the electrical signals to a computer; recording the process and the corresponding time point from breakage starting to a complete breakage of the first and second cemented surfaces by a photographic instrument; obtaining a strain rate time travel curve and a stress-strain curve, and obtaining the corresponding breakage strength by analyzing the curve peak points.