Patent · US Active

Method for evaluating downhole working condition of a PDC bit

US11959375B2 · kind B2 · utility

0Cited by

0References

6Claims

0Family size

Assignee

CNPC Engineering Technology R&D Company Limited · CN

Inventors

Guodong JI · Beijing, CN
Haige Wang · Beijing, CN
Meng Cui · Ashburn, US
Zhao Meng · Beijing, CN
Qiang Wu · 流花街道, CN
Li Liu · Kunshan, CN
Jiawei Zhang · Sunnyvale, US
Changchang CHEN · Beijing, CN
Liu Cui · Beijing, CN
Jing Yu · New Taipei, TW

Key dates

Filing date	Mar 16, 2021
Grant date	Apr 16, 2024
Priority date	—
Expiry date	Aug 29, 2042

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B2200/20
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.