Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Vertical Connection of an Underwater Flexible Pipe in a Subsea Equipment
Submission Author:
Yuri Coelho Del Sarto , SP
Co-Authors:
Yuri Coelho Del Sarto, Celso Morooka
Presenter: Yuri Coelho Del Sarto
doi://10.26678/ABCM.ENCIT2018.CIT18-0281
Abstract
The present study describes the numerical analysis of the Subsea Flexible Pipe installation method named as “Direct Vertical Connection”. This type of operation is widely employed in offshore deep water petroleum fields in Brazil, and the main concept is to connect the flexible pipe in the subsea equipment by using a Vertical Connection Module. The commercial software OrcaFlex is used to perform the numerical analysis of the operation. For this purpose, an external function is implemented to represent the reaction of the subsea equipment to the Vertical Connection Module, i.e., the elastic stiffness of the subsea equipment is represented by a Euler–Bernoulli beam. Lumped mass method is used to represent the flexible pipe through the numerical tool, in which the physical properties and loads such as mass, weight, buoyancy, drag forces are discretely distributed at the nodes. The hydrodynamic forces are considered according to Morison formulation. A sensitivity study is proposed by varying the inertia and drag coefficients in the Morison formulation, in order to verify their influence in the system response through the bending moments, wall tensions and shear forces.
Keywords
Vertical Connection Module, Production Riser, Riser installation method, Direct Vertical Connection
