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:
Apr. 23, 2024
Filed:
May. 05, 2023
Southwest Petroleum University, Chengdu, CN;
Kuanhai Deng, Chengdu, CN;
Niantao Zhou, Chengdu, CN;
Yuanhua Lin, Chengdu, CN;
Mingyuan Yao, Chengdu, CN;
Ming Zhang, Chengdu, CN;
Deqiang Yi, Chengdu, CN;
Pengfei Xie, Chengdu, CN;
Yang Peng, Chengdu, CN;
SOUTHWEST PETROLEUM UNIVERSITY, Chengdu, CN;
Abstract
A quantitative evaluation method for integrity and damage evolution of a cement sheath in an oil-gas well is provided based on a fractal theory, an image processing technology, structural features and failure mechanisms of a casing-cement sheath-formation combination. The method uses correlations among fractal dimensions of casing-cement sheath interface morphology, cement sheath microscopic pore morphology, particle morphology of an initial blank group, and macroscopic mechanical properties including a radial cementing strength of the cement sheath interface, a tensile strength, and a compressive strength to quantitatively evaluate the integrity of the cement sheath of the blank group. The method further uses correlations among fractal dimensions of the casing-cement sheath interface morphology, cement sheath microscopic pore morphology, particle morphology, crack morphology after an alternating load, and the macroscopic mechanical properties of the cement sheath to quantitatively evaluate a regularity of the damage evolution of the cement sheath of a conditional control group.