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. 14, 2026
Filed:
Dec. 30, 2024
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, CN;
Siqi Shu, Beijing, CN;
Abstract
An in-situ stress measurement method based on indentation technology and machine learning includes steps as follows. A rock core is obtained to be processed into a sample. A shallow indentation test is conduct on the sample to obtain the indentation load-depth curve and the equivalent elastic model is derived. A deep indentation test is performed and the test data is used as actual training samples for machine learning. The actual training sample set is input into the neural network for network training to obtain an inverse problem model of in-situ stress. An in-situ indentation test is performed on the sample and, based on the equivalent elastic model, the minimum and maximum horizontal principal stresses are calculated. A direction of main crack of an indentation at a bottom of a borehole as a direction of the maximum horizontal principal stress is measured by an imaging logging tool.