.... upstream oil & gas flexible riser tensile armor layer experimental data metals & mining axial compression load equation riser compression load armor wire displacement offshore mechanics flexible pipe modeling & simulation armor layer external pressure stiffness arctic...

... of simplification, choice of element type and determination of contact stiffness are among the key parameters when modelling such components. Mesh sensitivity on sheath layers, filled bodies and tensile armor wires is carried as well. Their effects on physical properties of the cross section, stick and slip...

... properties, it is challenging to identify and to model the shear forces accurately. This paper presents the results of eight small-scale experiments run on the prototype of a novel test rig. In each experiment, a bitumen-coated armor wire is pulled out of a cable stub at constant pulling speed...

.... THEORETICAL MODEL A single helical wire wound around a cylinder for the typical structure of flexible pipes is shown in Figure 2. The geometrical expression of the helical wire is presented as Eq. 1 Fig.2 Single helical wound armor wire x = R c o s t y = R c o s t z = t (1) One helical wire wound...

... Effect of Pitting Corrosion on Fatigue Life of Flexible Armor Wires Venkat R. Krishnan ExxonMobil Upstream Research Company Houston, TX, USA Fernando V. Stump ExxonMobil Upstream Research Company Houston, TX, USA Krassimir Doynov ExxonMobil Production Company Houston, TX, USA Wan C. Kan ExxonMobil...

... Risers; Fatigue; Corrosion; Life Extension; Inspection; Analysis. INTRODUCTION In the area of flexible riser integrity, understanding the pipe annulus environment and the status of armor wires within the annulus is of critical importance. Experience by Flexlife and others in riser annulus testing has...

... Abstract Coating armor wires of subsea power cables, umbilicals, and power umbilicals in bitumen is a common industry practice due to bitumen's excellent and field-proven anti-corrosion properties. The temperature dependent, viscoelastic behavior of bitumen influences the cables...

... Abstract Bitumen is field-proved to be a highly effective corrosion protection for steel armor wires in subsea power cables, umbilicals, and power umbilicals. Bitumen's viscoelastic properties are known to influence the mechanical properties of cables, umbilicals, and power umbilicals. Still...

... Effect of Pitting Corrosion on Fatigue Life of Flexible Armor Wires Venkat R. Krishnan ExxonMobil Upstream Research Company Houston, TX, USA Stefanie Asher ExxonMobil Upstream Research Company Houston, TX, USA Wan C. Kan ExxonMobil Production Company Houston, TX, USA Carl Popelar Southwest...

... the risers currently in operation. The majority of the known cases of critical damage to flexible risers concern the armor wires at the top section of the riser. This paper presents the results of the laboratory test conducted with a bank of sensors installed on a flexible riser test piece under tensile load...

... materials and corrosion oilfield chemistry end termination armor layer upstream oil & gas armor wire full scale testing riser corrosion carcass flowline corrosion barrier layer thickness force institute carcass material application internal pressure Proceedings of the Third (1993...