General Pulse Structural Monitoring
- 1. Pulse Structural Monitoring Hisham Sheriteh
- 2. 19 Companies 500$Mill Revenue 1400 People
- 3. What We Do ? Design, supply, install and manage monitoring systems to measure motion and strain of structures subsea to deliver understanding, confidence and improved operational efficiency of structural assets
- 4. PULSE Services Structural Data Delivery Services Design and Supply Monitoring Systems Data Processing & Management Offshore Installation and support
- 5. PULSE Services Cycle Complete Service Client Requirement Monitoring system design Instrument supply Installation and Commission Report Data Processing management
- 6. Pulse Offices Project Locations
- 7. Structures Monitored Marine drilling risers Completion risers Steel catenary risers Top-tensioned risers Flexible risers Blow-out preventer stacks Conductors Chain stopper Stress joints Tethers Off-take lines Templates Flex-joints Pipelines spans Pipelines during lay Mooring cables Pipeline hold-back tethers Jacket platform Handling equipment Vessel structures
- 8. SCRs Agip Allegheny, 600m, GoM BP Horn Mountain, 1300m, GoM (realtime) Chevron Tahiti, 1300m, GoM (realtime) Drilling and Completion Risers Thunder Horse Drilling Riser and CWOR, 2000m, GoM (standalone and realtime) BP Rebecca and Reki, 1000m, Brazil BP Schiehallion, 360m, WoS BP Svinoy and Assynt, 1000m, Faroes BP Algodaol Drilling riser, 770m, Brazil BP Sakhalin Drilling Riser TFE Donggalla, 1800m, Indonesia Track Record Highlights for Riser Monitoring
- 9. Experience Statement Subsea monitoring experience: Monitoring projects: INTEGRIpod supplied: Subsea deployments: Depth of deployment: > 12 years > 200 > 350 > 500 > 6000ft
- 10. Tahiti SCR Monitoring System Tailored engineering solution System integrator Maximize existing technology 15 sensor stations Over 50 sensors utilized Industrial communication bus Tailored user software Hang-off jumper Hull umbilical Soft tank UTA Hang-off UTA Hang-off Sensor stations TDP Sensor stations Segmented umbilical Extended flying lead TDP UTA Flowline UTA Buckle Strips
- 11. Tahiti SCR Instrumentation Tailored Engineering
- 13. Standard Components Subsea Data Loggers Subsea Sensors Mechanical Interfaces Software packages Standard, modular, proven, cost effective and fast delivery
- 15. M Motion Acceleration Angular rate Inclination Orientation Displacement F Force Strain Curvature Tension E Environmental Depth Pressure Temperature Gas Sound S (Standalone) A (Acoustic) H (Hardwired) Data collection architecture Measurements with various sensors Subsea Data Loggers
- 16. Family MOTION Measures: Tri axial acceleration Tri plane angular rate Bi-plane inclination Derived parameters: Linear displacement Acceleration due to motion Average inclination Harmonics INTEGRI pod™ -SM INTEGRI pod™ -SM+ INTEGRI pod™ -AM Standalone + Motion (standard motion sensor) Standalone + Motion (high-grade motion sensor) Acoustic + Motion (optional motion sensor) INTEGRI pod™ -HM Hardwired + Motion (optional motion sensor)
- 17. High Freq Vibration Monitoring System Spider Sensor Cable Logger
- 18. Subsea Data Loggers Software
- 20. Subsea Sensors
- 21. Underwater Strain Gauges Sensors Foil-type industry accepted electrical strain gauges+ Packaged in PULSE proprietary sealing and protection system PU Encapsulate strain gauges Triple-layer water sealing layers Fiber-glass molded shell Mechanical protection Protected cable routing Qualified procedures
- 22. Subsea Strain Gauge Installation On K joint On straight pipe (0.6 m OD) Structural strain monitoring On K joint
- 23. Fibre-Optical Strain Sensors Use proven specialist in optical strain gauges Utilize existing strain gauging expertise Intrinsically safe The solution for tankers, FPSOs, etc
- 24. Subsea Dynamic Curvature Sensor The “Stick” 0.5m long pressure balanced, 3000 meter rated Easy-to-bend Strapped to any structure externally with or without coating with minimum preparation and effort Strapped to a structure To data logger
- 25. Subsea Dynamic Curvature Sensor
- 26. Subsea Strain Sensor Upper collar Lower collar (0.6 meter apart) 4 Sensors (3 redundant systems) Structural pipe Sensor body Piston Oil-filled Output to INTEGRIpod Resolution in tension measurement: 2 tonne or better
- 27. Sensor Module Proven displacement sensor Sensor moulded in an anti-corrosion alloy plug Small force to operate Can be packaged differently to suit different applications
- 28. ROV/Diver Deployable Strain Sensors Sensor Module Pad #1 Pad #2 Pad #1 Pad #2 Magnetic pads Magnetic pads Joining steel brace Connection to Data logger
- 29. Diver Deployable Strain Sensors Integripads connected to data logger Up to 4 Integripads per data logger
- 30. Mooring Chain Tension Sensor
- 32. Pick & Mix components into a system with minimum functionality for monitoirng a specific subsea structure Benefit Standard and modular components Proven technology Cost effective Fast delivery Monitoring Systems
- 33. Offshore Structures Motion Position Force
- 34. System overview
- 35. Mooring Line Monitoring System
- 36. SLOR Air Can Tension Monitor
- 37. For more Information please contact: Hisham Sheriteh Sales Engineer D: +44 (0)1483 774958 M: +44 (0)7979 645402 hisham.sheriteh@pulse-monitoring.com
- 39. Contents Unbonded Flexible Pipe Overview Why monitor? Monitoring Approach Testing Benefits
- 40. Unbonded flexible pipe overview Successful armor wire rupture test conduct at Submarine Technology Lab (LTS) at Federal University of Rio de Janeiro (UFRJ) A 4.3m section of flexible pipe is tensioned within a steel structure using hydraulic actuators. A total of 30wires are broken, both on the external and internal layers
- 41. Unbonded flexible pipe overview Carcass (Stainless / Duplex Steel) External Pressure Resistance Inner Sheath (Polymer) Internal Fluid Containment Pressure Armor (Carbon Steel) Hoop and Radial Load Resistance Tensile Armor (Carbon Steel) Axial Load and Torsion Resistance Outer Sheath (Polymer) External Fluid Barrier Not Shown: Anti-wear Layer (Polymer) Insulation Layer
- 42. Flexible riser failure modes Accessory failure e.g. bending stiffener Corrosion outer sleeve puncture interference Fatigue initial defect for crack propagation (knife) Fatigue cyclic bending vibration vortex shedding
- 43. Why monitor? External sheath damage Contact with platform brace Bend stiffener contact with I-tube Localized compression in the bellmouth Sharp corners inside bellmouth helmet Armor wire rupture Fatigue at the I-tube Corrosion followed by external sheath damage Uncertainties Risk to equipment Operating envelopes
- 44. Where it is likely to fail? Top of riser: Highest static and dynamic loads Highest dynamic effects: fatigue Highest design uncertainty Most common failure region is at the top of the riser
- 48. Based on Pulse’s field-proven product range Over 12+ years of riser monitoring experience Monitors failure modes near the fatigue critical riser/platform interface Online System Simple installation Non intrusive Monitoring approach
- 49. Engineering Deployment design Response assessment and placement study Hardware Supply Installation Data processing and reporting Typical scope
- 50. System overview - communications
- 51. Components of Pulse’s system integrates 4 separate subsystems to inspect the integrity of the flexible riser: INTEGRIpod-M near the connector and at the exit of I-tube Gas detection sensor near the connector Pressure sensor near the connector Topside data acquisition System
- 52. Benefits of Armour wire failure detection Annulus pressure monitoring Gas leakage into pull tube detection monitoring Hang-off motion monitoring Hang-off angle monitoring Strain Monitoring VIV monitoring Top tension monitoring Differential angle across bend stiffener monitoring Vessel and riser hang off position (GPS) monitoring
- 53. Principle Continuous riser inclination and motion monitoring Sound emission, axial movement and transit twist during rupture Annulus pressure and gas content (Optional) Riser
- 54. Testing
- 55. Wire cutting region Microphone Conector Monitoring System Compass + Inclinometers Axial Accelerometer Angular Rate x 2
- 57. Sequence of wire break under tension
- 58. Results Signal with peak / without peak
- 60. Preliminary Offshore Test Prototype system supplied by 2H is installed on a platform for 4 days below the bend stiffener Data from sensors are logged into a computer continuously Data logged are compared with the Lab test data (wire break data)
- 61. Results Offshore Test VS. Lab Wire Break Test Microphone
- 62. Results P19 Offshore Test VS. Lab Wire Break Test Axial accelerometer
- 63. Results P19 Offshore Test VS. Lab Wire Break Test Angular rate sensor
- 64. Conclusions
- 65. Test Conclusions Sensors in the Pulse flexible riser monitoring system detected wire failures for all 30 wire breakages, regardless of riser tension applied. Rotations in both the clockwise and anticlockwise directions are detected Clearly detectable peaks in the logged signal are detected by 4 of the sensors, during wire breakage. These peaks are easily identifiable even above the noise due to hammer tests to determine changes in the acoustic properties of the riser.
Editor's Notes
- #17: The INTEGRI line of products that has been especially developed by 2H for Subsea Integrity Monitoring