The 20-Hurricane Test: New Knowledge On Deepwater Polyester Mooring Integrity

ABSTRACT In a recent U.S. Minerals Management Service (MMS) sponsored project exploring the “value of polyester insert recovery and testing,” we found that: (1) the only major cause of rope structural integrity loss was third-party damage to the mooring system components, and...

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Vortex Induced Motions Of The Horn Mountain Truss Spar

ABSTRACT: Vortex Induced Motion (VIM) of a Spar platform is an important consideration in the design of Spar moorings and risers. During the design phase, the VIM characteristics of a Spar configuration are evaluated by hydrodynamic model testing. The basis for hydrodynamic model...

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DW RUPE: A New Deepwater Pipeline Repair Capability for the Gulf of Mexico and Other Deepwater Regions

ABSTRACT Described herein is a chronology for developing a deepwater pipeline repair system and cooperative ownership group for affecting emergency repairs of damaged pipelines. Using a Joint Industry Project (JIP) funding model, technology development started in 2004, and...

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Effectiveness of Polyethylene Helical Strakes in Suppressing VIV Responses After Sustaining High Roller-Load Damage During S-Lay Installation

ABSTRACT Helical strakes are an important Vortex Induced Vibration (VIV) suppression device for Steel Catenary Risers (SCR’s).   This paper presents the results of two sets of hydrodynamic tests performed at MARIN, on a 12” pipe fitted with 16D Helical Polyethylene...

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Polyester Moorings: Is Insert Recovery and Testing the Best Way To Determine Rope Integrity?

This technical paper addresses the value of regulatory requirements to recover and test 15-meter inserts from polyester mooring systems for production systems in the Gulf of Mexico. The authors have been working on a MMS-sponsored project to determining the Accuracy of Polyester...

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Spectral and Cycle-Counting Fatigue Damage Estimation Methods for Steel Catenary Risers

ABSTRACT Estimating fatigue damage under wind-driven sea loading is of primary importance in the design of steel catenary risers (SCRs) serving floating hosts. For design, the wind-driven sea is modeled as a stationary random process. The resulting dynamic stress in the SCR is also...

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Fracture Mechanics-Based Fatigue Predictions for HPHT Equipment

ABSTRACT A methodology covering fatigue life predictions for high pressure high temperature (HPHT) equipment is presented. HPHT equipment is generally thick-walled and by a common definition involves pressure ratings of 15,000 psi and above and temperature ratings of 350ºF and...

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Taking Another Look at the Risk Profile for Air Drilling in the Presence of Hydrocarbons

ABSTRACT Drilling with compressed air continues to enjoy vast popularity. However air drilling is not without its impediments; not the least of which is its reactivity with hydrocarbons. The application of drilling with compressed air provides many benefits, but misapplication of...

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Advancements in Design and Testing of Shrink-Wrapped Tray-Based Secondary Packaging

ABSTRACT New techniques have been developed to test the increasingly common shrink-wrapped tray-based cases and unit loads.  This type of secondary packaging is structurally very different from traditional corrugated cases with a corresponding need for new methods of testing and...

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