About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
Investigation of the Failure Mechanism of a 35CrMo Polycrystalline Diamond Compact Drill Bit |
Author(s) |
Xingjie Li |
On-Site Speaker (Planned) |
Xingjie Li |
Abstract Scope |
Polycrystalline diamond compact (PDC) drill bits are widely used in oil and gas drilling. In this study, the failure mechanism of a 35CrMo drill bit is addressed by fracture analysis, dye penetrant inspection, hardness test and stress distribution simulation. The results show that the PDC bit is mainly composited of sorbite and ferrite. The presence of the bulk ferrite can significantly reduce the hardness and tensile strength of the drill bit. With the help of stress distribution simulation, it is found that there is a stress concentration at the intersection of the blade root and its adjacent water outlet. Cracks initiate at some stress concentration sites and then propagate along the bulk ferrite, causing the failure of the PDC drill. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Iron and Steel, Modeling and Simulation |