rms lecture 2 - monitoring and advice
TRANSCRIPT
14/12/2012
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WORLD CLASS – through people, technology and dedication
2 Days RMS Operator Course
Lecture 2 – Monitoring and Advice
KONGSBERG Oil & Gas Technologies
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RMSMonitoring and advice
• Monitoring and advice is the main function of RMS
• A correct calibrated system provides a reliable and efficient system for operator advice in both normal and critical
situations
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Monitoring and Advice - Overview
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Optimum position monitoring
Main data view
Flex joint angle monitoring
Alarm summary
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Optimum Position Advice
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• Optimum position view is the main view in RMS
• Always present and continuously updated, reflecting present operating conditions
• Shows graphical symbols of vessel, wellhead, watch circles and optimum position
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Optimum Position Advice
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The optimum position advice is based on top and bottom flex joint angle measurements, top tension and mud weight in combination
with the riser model representation in RMS
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Optimum Position Monitoring
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Optimum vessel position - Best compromise between optimum position for UFJ and LFJ
LFJ optimum position
LFJ watch circle
UFJ watch circle
UFJ optimum position
Vessel
BOP RKB
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Optimum Position Monitoring
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Optimum position advice
Options for zoom and north up / vessel heading up
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Flex Joint Angle Monitoring
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• The Flex Joint Angle monitoring view is always present in RMS
• Polar plot view that shows averaged upper and lower flex joint angles as well as their operational limits
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Flex Joint Angle Monitoring
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Upper flex joint monitoring
Lower flex joint monitoring
Black dot indicating magnitude and bearing of the flex joint angle
Circle indicating yellow operational limit
Circle indicating red operational limit
Dotted line indicating bearing of angle
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Flex Joint Angle Monitoring
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1. No current, no offset
1.
2. 3.
2. Current from south, no offset from wellhead
3. Offset from wellhead in north direction
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Main Data View
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• The Main Data view is always present in RMS
• Based upon selected operation mode, most important monitored variables are showed
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Main Data View
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Flex joint angles
Telescopic joint stroke
Tensions
Mud density
Time to go
Main data view – Drilling mode
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Alarms and Alarm History
• Alarms are presented in separate Alarm View
• Accessible through all views
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System Menu
• Calibration
• Setting operation mode
• Changing user level
• About dialog
• Exit
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System Menu
• Access to some of the System Menu functions are dependant on user level
• Log in as super user to get access to all functions
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View Menu – View Options
• Changing system units
• Setting Day or Night view
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View Menu - Sensor View
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• Overview of incoming sensor values
• Possibility to set gain, offset or manual value
• Choose which POD to use and redundancy
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View Menu- Tensioners
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• Shows current force and stroke for each tensioner, along with warning and alarm limits
• Possibility to disable tensioner input to RMS
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View Menu - Tensioners
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Tensioner stroke Tensioner pull
Enable / Disable tensioner input to RMS
Hover mouse over tensioner for detailed info
Yellow and red operational limits
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View Menu - Riser Load Monitoring
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• Shows effective tension distribution along the riser, based on measured top tension and theoretical weight
• Shows bending moments in upper and lower part of the
riser
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Riser Load Monitoring
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Effective tension distribution along the riser
Bending moment for the upper part of the riser
Bending moment for the lower part of the riser
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View Menu - Connector Loads
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• Shows capacity envelopes as well as current loads for BOP and LMRP connectors
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View Menu - Connector Loads
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Connector load for LMRP
Connector load for BOP
Present sensor values
Design and operational limits
Current load
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View Menu - Time To Go Monitoring
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• Shows the estimated development in a case of drift off
• Optional feature
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View Menu - Time To Go Monitoring
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• RMS Time to go function predicts available time for initiating emergency disconnect in case of drift off
caused by a blackout or worst single failure event
• DP system identifies the worst single failure that would cause the most severe drift off scenario
• DP’s motion prediction module performs an estimate on resulting drift off path
• Based on drift off path, RMS calculates riser response during drift off
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View Menu - Time To Go Monitoring
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• Numerically presented in main data view
• Graphically presented in optimum position view
Arc representing Time To Go limit
Red dot shows vessel position durng last Time To Go calculation
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Time To Go Example
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Estimated development for:
Telescopic Joint Stroke
Upper Flex Joint Angle
Lower Flex Joint Angle
Time to go results and limiting conditions
Operational limits
280 sec- 20 sec= 260 sec (4 min 20 sec)
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Time To Go Monitoring
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Separate tab showing vessel drift off trajectory
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Riser Shape
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• Gives you a 3D representation of the Riser Shape
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Riser Position Reference – RPR
• RPR is a backup reference system.
• Only intended to be used in situations when all other reference systems are lost.
• Activate in RMS OS and monitor on DP OS.
• Recalibrate when neccesary.
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RPR User Interface
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RPR States
• Connected
Initialization OK
• Ready
Calibration OK and system ready to be set as active
• Active Activated and ready to be enabled or monitored on DP
• FaultFirst try a Master Reset. Investigate fault message, take
neccecary actions.
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RPR Active State
• Activate RPR by pressing Go To Active button.
• Verify correct operation by monitoring RPR on DP.
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View Menu - History Plots
• History plots are available for various parameters; including flex joint angles, top tension and telescopic
joint stroke
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External Trend and History Plots
• Advanced logging in a seperate trend application
• Start Menu -> Program Files -> Kongsberg Oil & Gas Technologies ->RMS -> RMS TrendView
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Exercise 1 – Optimum Position View
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Name the different items in the Main View
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Exercise 2 – Optimum Position View
1. What is the definition of the optimum position?
________________________________________________________________
2. On which limits are the flex joint’s watch circles based?
________________________________________________________________
3. The grid in the picture is 20m. Approximately how far is the advised move?
________________________________________________________________
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Exercise 3 – Flex Joint Angle Monitoring
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What do the different items in the Flex Joint Angle View tell us?
1.__________________________________________________________________
2.__________________________________________________________________
3.__________________________________________________________________
4.__________________________________________________________________
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Exercise 4 – Flex Joint Angle Monitoring
1. What are the high and high-high operational limits for the flex joints?
______________________________________________________________________________________________
2. In which direction would RMS advice to move the vessel?
______________________________________________________________________________________________
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Exercise 4 – Flex Joint Angle Monitoring
3. Where will the black spots for the UFJ and LFJ be displayed if the vessel is west of the wellhead, no current is present and sufficient top tension is applied?
____________________________________________________________________
4. In which direction would RMS advice to move the vessel?
____________________________________________________________________
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Exercise 5 – Utilities
• What user level is required to change operation mode?
__________________________________________________________________
• What information changes in the Main Data View when changing operation mode from Not in Operation to Drilling? __________________________________________________________________
• Which measurements are most important when operation mode is set to Drilling?
__________________________________________________________________
• What is the current mud density?
__________________________________________________________________
• Is mud density a measured value?
__________________________________________________________________
• What types of display units are available in the RMS system?
_________________________________________________________________
• What is the last alarm that was acknowledged?
__________________________________________________________________
• What is the current RMS SW version?
__________________________________________________________________
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Exercise 6 – History Plots
• Open the telescopic joint stroke history. What are the yellow and red limits for this value?
__________________________________________________________________
• Is the telescopic joint stroke a measured or calculated value?
__________________________________________________________________
Start the RMS TrendView application. Locate the roll, pitch and heave measurements.
• Which sensors are these measurements received from?
__________________________________________________________________
__________________________________________________________________
• How do you export data?
__________________________________________________________________
__________________________________________________________________
• What is the file format of an exported variable from TrendView?
__________________________________________________________________ __________________________________________________________________
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Exercise 7 – Monitoring
• Try to disable and then enable a tensioner? How many tensioners is the system set up with?
__________________________________________________________________
• What is the maximum bending moment on the upper part of the riser?
__________________________________________________________________
• What is the current LMRP utilization factor?
__________________________________________________________________
• What is the current Time To Go limiting condition?
__________________________________________________________________
• Alter the Time To go operational limits and note changes:
__________________________________________________________________
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Exercise 8 - Sensor View
• What is the colour of a measurement value that has an error?
__________________________________________________________________
• Is there redundancy on the lower flex joint measurements?
__________________________________________________________________
• Is there redundancy on the upper flex joint measurement?
__________________________________________________________________
• How do you select which POD measurements to use?
__________________________________________________________________
• In which tab could the status of the time-to-go signal be found?
__________________________________________________________________
• What are the measurements from the upper flex joint inclinometer called?
__________________________________________________________________
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