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. 16, 2024
Filed:
Mar. 16, 2021
Cnpc Engineering Technology R&d Company Limited, Beijing, CN;
Guodong Ji, Beijing, CN;
Haige Wang, Beijing, CN;
Meng Cui, Beijing, CN;
Zhao Meng, Beijing, CN;
Qiang Wu, Beijing, CN;
Li Liu, Beijing, CN;
Jiawei Zhang, Beijing, CN;
Changchang Chen, Beijing, CN;
Liu Cui, Beijing, CN;
Jing Yu, Beijing, CN;
CNPC Engineering Technology R&D Company Limited, Beijing, CN;
Abstract
A method for evaluating a downhole working condition of a PDC bit includes: performing an indoor test, including performing a drilling test in different full-sized cores by using the PDC bit with different degrees of abrasion and balling under condition of given WOB and rotational speed, to acquire change characteristics of a WOB, a rotational speed, a torque, a ROP and a bit vibration of the PDC bit in different time domains; improving and perfecting an existing prediction model and evaluation method for the downhole working condition through data obtained by the test to obtain the method; reading parameters of the WOB, the rotational speed, the torque and the ROP in real time during drilling; determining the downhole working condition of the PDC bit by using the method in the improving and perfecting.