Session: HT-06-01 Design and Analysis of High-Pressure Equipment for Oil and Gas Exploration and Production

Paper Number: 65338

Start Time: Wednesday, July 14, 2021, 09:00 AM

65338 - Functional Analysis of a HPHT Subsea Tool Under Thermal Loads 

Functional assessments play an important role in design verification of equipment in a high-pressure, high-temperature (HPHT) environment. For complex assemblies composed of multiple components, functional assessments study the effect of external factors, such as mechanical and thermal loads, that can change the internal configuration and lead to an operation failure.

 

All major oil and gas industry standards mandate consideration of the thermal loads in design verification. However, no guideline is available on the methodologies to be followed for evaluating the thermal loads.

In this study, thermal and structural finite element models of an HPHT subsea tool assembly are developed to evaluate the effect of thermal loads on its functionality.         Thermal loads are applied by means of a sequentially un-coupled thermal stress analysis. This is performed by obtaining temperature gradient across the assembly in transient and steady state conditions. A transient thermal analysis is performed to determine the temperature distribution in the assembly. The transient thermal analysis results (the nodal temperature values) are mapped from the thermal model onto the structural solution model to obtain thermal strains at various points in the assembly over the course of the simulation. The deformations resulting from the thermal loads are evaluated against internal acceptance criteria such as seal gaps, clearance between dynamic components, etc.

Presenting Author: Gaurav Bansal Schlumberger

Authors:

Gaurav Bansal Schlumberger
Ali Sepehri Schlumberger
Mangesh Edke Schlumberger