CHAZOP_Presentation

www.odfjelldrilling.com
DEEPSEA ABERDEEN
BOP CHAZOP
03/25/2014
Prepared by Arun Jothilingam
Odfjell E&I Engineer

CONTENTS
1. Introduction to Dual BOP Control System
2. Different BOP Modes of Operation
3. Overview of Active BOP Operation Selection process
4. BOP Selection de-selection Interlocks
5. EWS Test-Mode Interlocks
6. System Redundancies Performance standards
7. 3rd party Interface options
8. Alarm management System
9. Guarded functions
10.Function logger
11.Design Basis Ex Rating
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1. INTRODUCTION TO DUAL BOP CONTROL SYSTEM
 The control system consists of two semi-independent BOP control systems, Mux (6-
Ram) BOP and Hydraulic (5-Ram) BOP.
 The BOP control system equipment can be categorized in to one of these 3 groups:
• Dedicated to MUX BOP (Drillers/Toolpushers, CCP & EWS M/S
panels and Subsea pods)
• Dedicated to HYD BOP (Drillers/Toolpushers, CCP/EWS panels
and Surface Control Panel)
• Common equipment - shared between both BOPs (HPU/Mixer,
Diverter Panels and UPS 1&2)
The block diagram 10659592-DIA detail the overall system architecture and location of
major equipment.

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COMPONENTS OF DUAL
BOP CONTROL SYSTEM

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MUX & HYD PANELS TOGETHER

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MUX EWS MASTER MUX EWS STANDBY

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MUX CCP PANEL HYD CCP PANEL

MUX BOP CCP PANEL
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HYD BOP CCP PANEL

2. DIFFERENT BOP MODES OF
OPERATIONS
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MUX BOP in Operation
Operation Mode
MUX BOP
Driller Cabin
Touch Screen
MUX BOP
Toolpusher Cabin
Touch Screen
MUX BOP
CCP and EWS
MUX BOP
Controls with
Operational BOP
Main HPU
Controls with
Operational BOP
DIVERTER

HYD BOP in Operation
Operation Mode
HYDRAULIC
BOP
Driller Cabin
Touch Screen
Hydraulic BOP
Toolpusher Cabin
Touch Screen
Hydraulic BOP
CCP and EWS
Hydraulic BOP
Hyd. BOP
Manifold
Controls with
Operational BOP
Main HPU
Controls with
Operational BOP
DIVERTER

MUX BOP on surface during testing
For BOP at surface
Test HPU
Surface Mode
MUX
BOP
CCP and EWS
TEST MODE
MUX BOP
CCC SIMULATOR
MUX BOP

HYD BOP on surface during testing
For BOP at surface
Test HPU
Surface Mode
Hydraulic
BOP
CCP and EWS
Hydraulic BOP
Hyd. BOP
MANIFOLD

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 SELECTION OF ACTIVE BOP WILL BE COVERED WITH ODFJELL PTW PROCEDURE AND
CHECKLIST. KEY IS KEPT SAFE WITH THE DRILLING SECTION LEADER ONBOARD. ONCE THE
SELECTION IS MADE THE KEY IS RETURNED TO THE DSL DURING CLOSING THE PTW.
 Only one BOP control system can be used for active drilling at any one time.
 The active system will be selected by a 2 position key-switch (MUX/HYD) and indicated by a
lamp located on the CCP panel of each system.
 The common Elements HPUMIXER and Diverter is always assigned to the active BOP system
selected
 The selection is valid when key-switches on both systems match. This is indicated by System
Active lamp illuminated on the active system only.
 Based on the BOP selected, cyberbase System only shows the Information of the active BOP
to driller.
 The Drillers and Toolpushers panels of the In-active system will display “INACTIVE” and will
NOT allow any BOP control and will NOT display the BOP status to avoid confusion during
drilling.
3. OVERVIEW OF ACTIVE BOP SELECTION

 The Bridge EDS system has independent Control panels for both MUX and HYD BOP
 Only BOP in operation can be activated (EDS) from the bridge if needed.
 When Bridge EDS is activated it Will follow the sequence selected already from either Driller or
Toolpusher panel. NO SEQUENCE SELECTION IS POSSIBLE FROM BRIDGE
 Driller and Toolpusher Panels Touchscreens has indication on the Overview page to show where
EDS was activated and the sequence selected.
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MUX BOP HYD BOP
BRIDGE EDS PANELS

DEEPSEA ABERDEEN
4. BOP selection/de-selection Interlocks
 To de-activate the MUX system and activate the HYD system, the Pod Select must be in
Block and the Blue & Yellow Pod Power Off.
 To de-activate the HYD system and activate the MUX system, the Pod Select must be in
Block.
 If the interlocking condition is not met, the System Active lamp will flash with alarm
annunciated in all panels and the last valid selection will remain in place.
 The common Elements HPUMIXER and Diverter is always assigned to the active BOP system
selected.
 The BOP Active lamp will begin flashing when the local and remote key switch selections do
not match.
 A “HIGH PRIORITY” alarm will be generated on the EWS TPDP if the key-switches are not
matching for longer than 15 seconds
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DEEPSEA ABERDEEN
5. Surface BOP Testing Mode interlock
 ODFJELL PERMIT TO WORK AND PROCEDURES WILL NEED TO BE PROVIDED TO ENABLE
THIS TESTING FEATURE
The test capability for the “INACTIVE” system built in to the EWS will allow an operator to test
the inactive stack on the deck whilst drilling with the active system. This will be limited to Stack
and LMRP functions only.
 Key switch selection should be in correct position, EWS test mode is not available when BOP
is active and in operation.
 Pod needs to be Powered off and blocked before entering EWS test mode.
 Only supervisor login can be used to Enter EWS TEST MODE.
 The EWS screen has EWS test mode push button which only appears when BOP is inactive.
 The EWS screen has REQUEST HMI CONTROL Push button which enables functions to be
operated and only stays active for 30 sec at One given moment.
 To exit EWS TEST MODE, POD’s need to be in Block position and Powered Down mode.
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DEEPSEA ABERDEEN
Sample screenshots of EWS TEST MODE BOP IN-ACTIVE
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20

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Sample screenshots of EWS for active BOP

DEEPSEA ABERDEEN
6. SYSTEM REDUNDANCY KEY FEATURES
The BOP Control System design includes for redundancy of critical components as
detailed below:
 UPS (Uninterruptible Power Supply) – UPS1&2 located in different rooms
 Main Controller (Executes the BOP logic) – Main Cont. A located in CCP and B in
Toolpusher panel
 Communication Networks – Two independent Ethernet / fiber comms. networks
and switches for both MUX and HYD BOP
 Drillers & Toolpushers BOP Control panel – located in different rooms
 Drillers/Toolpushers panel OIT (Operator Interface Terminal) – Two OITs on
each panel (each OIT has full functionality independent of the other OIT)
 Panel Power supplies – each panel is supplied from both UPS’s and fitted with
redundant PSUs
 EWS (Engineering Work Station) – Two (Master & Stand-by) EWS located in
different rooms (Only applicable to MUX system)
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 Subsea Pods – Two (Blue & Yellow) independent subsea pods (Only applicable
to 6 Ram system)
 Subsea I/O – duplex I/O modules
 AADvance Controllers – redundant CPUs
 HYD BOP Control manifold has blue and yellow pod surface select, in additional
to mechanical Control in case of loss of Electrics.
 PUSH & HOLD FUNCTION for two handed operation prevents the accidental
operation of any control function.
 If a P&H button input is “stuck-on” for greater than 30 seconds the input is
inhibited, effectively disabling the pushbutton. Stuck P&H inputs are alarmed at
the EWS to an individual button level.
 ‘Lamp test’ button is provided on each Drillers, Toolpushers, CCP, SCP,
HPU/Mixer and Diverter Panel.
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SYSTEM PERFORMANCE CRITERIA
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7. 3rd party Interface options
3RD PARTY SERIAL COMMS INTERFACES
A simplex AB ControlLogix PLC is installed in the CCP to act as Firewall and
provide interface with 3rd party (not supplied by RA) systems. This
provides a read only link for data acquisition by 3rd party control systems
as listed:
 Drilling Control System
 Dynamic Positioning System
 Black Box (NOV supplied - Future)
3RD PARTY HARDWIRED INTERFACES
Relays with volt free contact fitted with line monitoring resistors are installed in the
CCP to provide output interface with 3rd party (not supplied by RA) systems as
listed:
 Riser Recoil System
 ELSA System
 EDS Disconnect from Bridge
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DEEPSEA ABERDEEN
8. Alarm management system
Alarm management system complies With Norsok / YA711 standards
Alarm shelving function available but High priority alarms cannot be shelved
Once an alarm has been selected for shelving from the alarm list, the operator will
be prompted to specify the time period for shelving (in minutes) and a reason for
shelving the alarm (via a comment field).
The below table shows the different alarm priorities colors
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DEEPSEA ABERDEEN
9. BOP Function Control – Guarded Functions
For these functions, control actions from the HMI will require confirmation by pop- up dialog
displayed in the lower left corner of the screen.
The guarded functions are identified by a different background color from the non-guarded
functions (red/white stripes instead of grey) or by a blue/yellow border (like on Push Button
based control panel mimic).
Blue/Yellow Pod Electric Power
Blue/Yellow Pod Female & Gripper
Riser Connector & Secondary
Blue/Yellow Lower Female Sec. Cylinder
Upper/Lower Shear Ram
Casing Shear Ram
Stack connector & Secondary
Orientation Pin
EDS Selector
EHBS (Arm/Disarm)
EHBS Mode (Drilling/Completion
Gooseneck split
Gooseneck to TR
Gooseneck to TJ Lock Dogs
TR Locking Hook
TR Separate Cyl
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DEEPSEA ABERDEEN

10. FUNCTION LOGGER
The primary purpose of the function logger is to count, display and maintenance tracking / reporting the operations
of the components of the Stack in accordance with NOV's Function Counting specification.
The Function Logger also provides a history of alarm activity that can be printed and the presentation of simple
trends of key logged stack operational parameters.
The Function Logger is only available whilst the EWS Master is running; in the event that the EWS Master is offline
then the EWS Standby stores data for forwarding on recovery of the EWS Master.
The data stored by the Function Logger is maintained in a series of databases for the period 90 days. After this
time the database is archived and stored.
The Function Logger user interface is presented via the Firefox browser. The information presented is query based
and does not dynamically refresh.
Two separate Function Loggers are provided, one for HYD BOP control system and one for MUX BOP.
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11. DESIGN BASE REQUIREMENTS
 Stack Layout
 BOP Functions List
 SEA to POD Wiring Schedule
 Emergency Disconnect Sequence
 Function Counting Specification
Other standards
 DNV Rules for Classification of Offshore Drilling Plant – DNV-OS-E101 – Oct 2009.
BS EN 60079-0 Electrical Apparatus for Explosive Gas Atmospheres: General Requirements.
BS EN 60079-1 Explosive Atmospheres: Equipment Protection by Flameproof Enclosure d.
BS EN 60079-7 Explosive Atmospheres: Equipment Protection by Increased Safety e.
BS EN 60079-15 Explosive Atmospheres: Equipment Protection Non- Incendive n.
 API Specification 16D – Specification For Control Systems For Drilling Well
Control Equipment and Control Systems for Diverter Equipment
API Standard 53 – Blowout Preventer Equipment Systems for Drilling Wells
REFERENCED DOCUMENTS
 IEC 61508:2010, Functional Safety of Electrical/ Electronic/ Programmable Electronic Safety Related Systems.
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HAZARDOUS AREA CLASSIFICATION
 The Drillers, Toolpushers, HPU/Mixer, Diverter and SCP Panels are ATEX certified for Zone 2
operation, gas group IIC and temperature class T4. The full equipment marking is as follows;
EX II 3 G Ex nA nC d IIC T4 Gc
 All others equipment panels are designed for mounting in a SAFE area, and do not have a
hazardous area rating.
 ATEX certificate ITS12ATEX47602X applies to HPU/Mixer and Diverter panels.
 ATEX certificate ITS12ATEX47xxxx applies to Drillers, Toolpushers and SCP panels.
 Below document gives the hazardous area plan of the rig.

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