Session: DA-09-01 Piping and Equipment Dynamics and Dynamic Response Analysis-1

Paper Number: 122851

122851 - A Finite Element Method to Simulate Non-Destructive Evaluation Testing of Downhole Tools Subject to Shock and Random Vibration 

The aim of this work is to present a FEA method that can simulate non-destructive evaluation tests conducted on downhole tools subject to shock and random vibration. The tool assembly i.e. a Surface-controlled Bidirectional Isolation Valves is rigged up to the vibration test table and subject to a shock signal or a random vibration signal in three mutually perpendicular axes as expected in well conditions. A corresponding 3-dimentional finite element model of a downhole tool is developed with component geometry details and relevant interactions between the components, accounting for inertia of components and structural material properties. The method involves a two-part analysis of the finite element model: response spectrum and transient dynamic analysis for shock and random vibration. This simulation predicts the mechanical response of the tool which is used to determine if failure occurs within its operating range. The unique contribution of this work is that the analysis approach can capture the effects of the response of tool assembly similar to non-destructive testing procedures for both shock and random vibration. Comparisons of frequency response tests and structural integrity inspection from simulations versus testing on the isolation valves, establish the fidelity of the FEA method as well as additional insights in the load path of the inner components of the tool assembly. The FEA method thus provides an alternative digital identification of the potential failure under shock and random vibration in downhole tool assemblies that is cost-effective and time-efficient, to reveal potential structural integrity issues of downhole tools in early design stage and identify critical components in the tools that need be monitored during their physical testing.

Presenting Author: Pritha Ghosh Schlumberger (SLB)

Presenting Author Biography: Pritha Ghosh currently works at the Schlumberger (SLB) Technology Center where she provides engineering expertise as part of the Enabling Technology group for state-of-the-art technology development of core energy tools, electronics and clean energy products. She has a solid mechanics background with computational and material modeling applications and has been helping clients solve challenging problems across various industries.

Authors:

Pritha Ghosh Schlumberger (SLB)
Ryan Sisak Schlumberger (SLB)