We were honored to have both Hsuan-Yu Chou and Zhenqi Yang from NOVI present at the SIMULIA Americas Users Conference, May 3-4, 2023 in Novi, Michigan.
Abstract: In downhole drilling, the transmission of mud fluid, weight, torque to the drill bit relies on the drill string. It comprises drill pipes, drill collars and the bottom hole assembly (BHA) including various crossover subs, motor, agitator, shock tool, stabilizer and etc. These components are jointed together using threaded connections. However, due to their complex geometry compared to the pipes or piping components, the treaded joints are prone to failure when the drill string undergoes different loads such as tensile, compression, bending, torque and compression during operation. This presentation first discusses the investigation of the failure at the drill motor connection. A 3D global model is constructed to predict the overall displacements of the drill string, followed by the stress analysis on the detailed 3D Box and pin connection of the motor assembly. Finally, this presentation demonstrates the evaluation of structural capacity when designing a threaded connector.
Bio: Dr. Hsuan-Yu Chou is Lead Simulation Scientist in NOV Corporate. He has over 10 years experience in performing multiphysics analyses to investigate fatigue, vibration, impact dynamics, and evaluate the structural integrity of designs following standards like ASME, API, BP5500. He has been supported all three NOV business units with a wide range of products including multiple Trailer systems, BOP, Top Drive, Connector/Tool joint, Downhole tools and Process vessels. He also involves in Design of Additive Manufacturing and designs for renewable products.
Bio: Dr. Zhenqi Yang works as a Lead Simulation Scientist in the NOV corporate office. For the past three years in NOV, he worked on multiple high pressure high temperature (HPHT) design verification and validation of BOPs, connectors based on ASME BPVC, API, and DNV standards. Before joining in NOV, Zhenqi worked in an engineering service group in Siemens PLM. He has over ten years of experiences in industrial, working on multiphysics analysis and simulation based design qualification, structural optimization to support the engineering design and manufacturing in energy, aerospace, and automotive fields. He has a PhD degree in mechanical engineering and was worked as a postdoc researcher in Northeastern University after graduation.
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