An Innovative Damper for Subsea Pipeline and Jumper Vibration Control

Lead Researchers:

Dr. Devendra Patil, Dr. Michael Ho,

Dr. Peng Zhang, Dr. Yi-lung Mo,

Dr. Gangbing Song

Akshay Kalia,

OneSubsea, a Schlumberger Company

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Motivation & Objectives

Introduction to PTMD

Test Results

Summary

Agenda

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Motivation:

Vibration problems - Vortex Induced Vibration (VIVs), Flow induced

Vibrations (FIVs), Slugging → Reduced fatigue life

Assessment and mitigation is expensive, lost revenues

Objective:

Improve Cost management and capital efficiency for our customers

Minimize spend on special analysis + Minimize spend on mitigation

+ Minimize lost revenues + Improve system availability + Improve

operational flexibility

Improve reliability of subsea jumpers/pipelines to minimize OpEx

Reduce spend on inspection, maintenance and repair

Develop a simple Passive Vibration suppression system

Can be added to existing infrastructure or new infrastructure

MOTIVATION AND OBJECTIVES

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Tuned Mass Damper

Taipei 101 (TMD) PTMD

TMD vs. PTMD

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PTMD – Transfers host structure energy via TMD element and dissipates

through impact on viscoelastic material

Mass block

Viscoelastic material and delimiter

(clamp-on piece)

Host structure

Horizontal arm

Vertical arm

(clamp-on piece)

Pounding Tuned Mass Damper

PTMD

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PTMD – Test in Air

6 in Well Jumper Test

PTMD – Test in Air

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Through joint collaboration between

OneSubsea, UH and NASA,

underwater testing was performed at

NASA’s Neutral Buoyancy Lab (NBL)

Test was to study the effectiveness of

PTMD in actual high damping

environment

NBL Pool with ISS Jumper Model with PTMD in NBL Pool

Team with NASA Astronaut -

Cpt. Christopher Cassidy

PTMD – Underwater Test at NASA’s NBL

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Underwater Test at NASA’s NBL

Full scale jumper – underwater testing

PTMD – Underwater Test

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Results showed 97-98% amplitude reduction

Response Time – 20-25 sec.

PTMD Released PTMD Released

Underwater Test - Results

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One solution for all vibration problems – FIV, VIV or slugging

The PTMD can target a broad frequency bandwidth for vibrations

(multiple modes of vibrations of jumper and subsea pipelines)

Can be mounted on new or existing infrastructure

Reduces fatigue damage to jumpers and pipelines

Increases life span with minimal spend on inspection, maintenance and

repair

SUMMARY

THANK YOU !