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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
TABLE OF CONTENT
1. INFORMATION 3
1. LOCATION INFORMATION 4
2. RESPONSIBILITIES 5
3. DEPARTING LOCATION 7
4. TOW ROUTE 8
5. ARRIVING DESTINATION LOCATION 12
6. PRELOADING OPERATION 13
7. COMMUNICATION 14
8. MEDIVAC PLAN DURING TOW 14
9. POSITION REPORT 14
10. EMERGENCY CONTACTS 14
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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
1. INTRODUCTION
The BMC 400 Pacific class Self Elevating MODU “RIG ATWOOD MANTA” is scheduled to move from PPL Shipyard, Singapore to Block G5/43 offshore Songkhla-E location in the Gulf of Thailand. The departure and arrival coordinates are as follows:
Departure co-ordinates Latitude: 01° 17' 47" N PPL Shipyard Longitude: 103° 44' 51" E
Arrival co-ordinates Latitude: 07° 34' 10.913" N Songkhla – E PlatformBlock G5/43 Longitude: 100° 37' 21.542" E
The move will be conducted in accordance with “RIG ATWOOD MANTA” Marine Operations Manual. Responsibility of the safety of personnel and integrity of the rig will at all times remain with the OIM (Offshore Installation Manager) during elevated mode and Barge Master during a float mode.
A pre-move meeting will be held and will be attended by key personnel involved in the rig move. The meeting will also be attended by the Captains of the towing and anchor handling vessel wherever possible. The purpose of this meeting will be to ensure that all personnel are aware of their job function and responsibilities and to agree on any technical aspects and constrains that may affect the operation.
Other discussion in the meeting should include the rig move procedures, voyage plan, charts, site survey reports, tidal height predictions, surface current predictions, navigational hazards, weather prediction and procedures prepared by the AHTS(s).
An additional pre-jacking meeting should be held on board the rig before the move to review all pre-move checks and to ensure that all fundamental safety systems on the rig are fully operational. This will include but not limited to ballast pumps, fire pumps, emergency generator and watertight integrity. Comprehensive pre-move checks will have been undertaken on jacking system, winches and all associated equipment involved in the rig move operation. Stability calculations and loading condition for the intended transit will have been prepared and remain available for review.
Weather forecast will be provided by two independent recognizable sources. Updated weather forecast will remain available on a 24 hours basis via email / fax. 4 days weather forecast should commence 4 days prior to the move and should be sent to the rig twice daily.
The weather limits for jacking operations are:Wind Speed: 25 KnotsSea state (combination of wind, wave and swell): 1.83 m
Survey equipment should be installed and made available before the final approach to the destination location is made. Proper functioning and accuracy of the equipment should be ensured before the final approach. All debris items, pipelines and other sea-bed obstructions should be displayed on the navigational screen before the final approach.
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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
Penetration Bow 4.8 meter; Port – 4.8 meter; Starboard – 4.8 MeterAir Gap 2 metersObstructions Dock and surrounding installations
Arrival location:, Offshore Thailand Block G5/43 Songkhla- E LocationRig Heading: + - 90 degreeWater Depth: 20.0 meter (66 ft.) LAT
Seabed Soil
Very soft clay from 0-3.0 metersSoft clay from 3.0-7.8 metersFirm clay from 7.8-2.5 meters
Penetration Expected 8.5 to 11.3mtrsAir Gap 11.5 to 27.4mtrs
ObstructionsAnchor chain north of location. Anchor spread from FPSO North side of location. Crude oil line north side of location.
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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
3. RESPONSIBILITIES
3.1 Offshore Installation Manager (OIM)
O.I.M will have full responsibility for the integrity of the unit and the safety of all personnel on board when the rig is in elevated mode.
O.I.M will have full responsibility for the integrity of the unit and the safety of all personnel on board when the rig is in a-float mode.
When advised by Atwood senior management that the rig has been cleared for departure and having consulted with the Barge Master and Warranty Surveyor, he will decide when it is safe and practicable to commence moving operations within the limits of the units Marine Operations Manual.
3.2 Client / Operator’s representative(s)
The Operator Coastal Energy will be represented by the Drilling Supervisor who will remain client’s principal authority on board. He may be accompanied by a Marine Representative from Coastal Energy. He will liaise with OIM / Barge Master as necessary to ensure the operator work plans are implemented properly. He will endorse the completion of all work activities and responsible for accepting the final position of the rig at the new location.
He will liaise between the personnel on the rig and Coastal Energy shore-base. All communications between the rig and the operator shall pass through him via the OIM / Barge Master.
3.3 Tow Master
The Atwood approved Tow Master will be responsible to the OIM / Barge Master for safely moving the rig from its current location to the next location. The responsibility will commence with confirmation of all preparation
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
checks to a point when the rig has been safely preloaded and elevated to operating air gap. His presence on board will in no way abdicate the rig crew and OIM of their respective duties and responsibilities.
He will communicate with the towing vessels and instruct them to ensure safe voyage transition and final positioning of the rig at the destination location.
He shall lead the discussion during pre-move meeting and pre-approach platform meeting.
He shall co-ordinate with Barge Master on aspects of stability and jacking. He will also inspect the towing vessels to ensure their suitability.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
3.4 Barge Master
Barge Master will maintain good communication with the Operator’s representative on board with regard to statutory permission to approach next location and acceptance of final position.
The Barge Master will ensure deployment of sufficient and competent rig crew for the safe and efficient conduct of the move operation. He will ensure that the move is conducted within the outline of the Marine Operations Manual. He will have the prime responsibility of all jacking operations.
He will prepare the stability sheets for the transit loading condition and ensure that they are available for review. He will ensure proper and adequate sea fastening / lashing of all loose items for the sea passage.
3.5 Warranty Surveyor
The Marine Warranty Surveyor is an independent consultant whose function is to ensure that MODU operation does not exceed an acceptable level of risk. The extent of such risk is defined by the parameters, criteria and limitations set forth by the rig’s design, as included in the Marine Operations Manual.
The attendance of the Warranty Surveyor on board is in an advisory role ‘only’. He will issue a Certificate of Approval for the move and will ensure that a Certificate of Approval for the location is in place. He will inspect the towing / anchor handling vessels to ensure their suitability for the operation.
3.6 Masters of Tow Vessels
They will be responsible for ensuring that the operations of their vessels are carried out in a safe and efficient manner with due regard to prevailing weather conditions and crew exposure on deck during rig move. The Masters will conduct operations in line with the International Rules for the Prevention of Collision at Sea, relevant marine regulations and good seamanship.
They are to immediately advise the Tow Master/ OIM of any concerns regarding the ongoing / planned operations in which they feel that the vessel crew may be subjected to unacceptable risks. In addition, they are to immediately advise of any failure of equipment or machinery where the capabilities of their vessels may be reduced.
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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
4. DEPARTING LOCATION
1. Reduce manning of non-essential service personnel as applicable per the Marine Operations Manual and Atwood policy.
2. Retract the cantilever to the stowed position and secure per the Marine Operations Manual.3. Utilizing the pre-move checks list and Marine Operations Manual, secure the rig for tow.4. Hold a pre-jack/pre-move meeting with available crew.5. Once all checks are complete and all leg stations are ready, jack-up 1 foot to confirm proper operations of
the jacking system and associated machinery.6. When suitable weather window has been established and agreed by OIM, Barge Master and GL Noble
Denton surveyor, jack down to 3 meter air gap.7. Connect the harbour tugs as per instructions of the harbour pilots / harbour tow master. The tugs will be
connected with soft lines.8. Lower the hull to 2 meter draft for watertight integrity checks9. On completion of integrity checks, lower the hull to floating draft. Connect jetting lines to legs (if deemed
necessary) and commence freeing legs.10. Confirm anchors are properly bolstered and secondary securing is in place.11. When disengaging bottom, raise the bow leg first (2 to 3 feet) and then all legs altogether. Move off location
and berth maintaining slow speed until all legs are well clear of the bottom.12. The unit will depart from its current location at PPL Shipyard under the direction of the harbour pilots &
harbour tow master and proceed to a pre-agreed position where the harbour tugs will hand over tow to the designated towing vessel. Continue raising legs till the spud-cans are retracted within the hull.
13. At the pre-agreed position, the rig will be held in position by the harbour tugs to facilitate connection of the designated towing vessel “Magellan 2” to the main towing bridle. Tow vessel “Pacific Bronze” will be connected to the Stbd forward auxiliary tow line. Once the towing vessel is connected, the harbour tugs will be released.
14. The harbour pilot and harbour tow master will disembark soon after the tugs are released. The rig and tow will proceed to the new location on the agreed tow route under directions from tow master. Towing vessel shall log consumables on board at the time of departure.
15. If applicable, continue raising the legs until in the agreed tow position having due regard for any shallow hazards in the area of transit. .
16. Once the legs are in the tow position the rig is to advise the lead tow vessel Master of the overall draft of the rig.
17. Once the rig is underway, all shore base communications will be via Inmarsat phone or facsimile.18. Integrity checks will be maintained throughout the tow on a regular basis and logged for future reference.
Any problems or discrepancies should immediately be relayed to the Barge Master and the Warranty Surveyor.
19.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
5. TOW ROUTE
The tow will proceed from Singapore to the Songkhla-E Platform location with the tow vessel(s) connected as directed by the tow master.
The rig will transit on the route as outlined below.
W.P. LAT. LONG. Course DIST. ETA NEXTW.P.
ARR. TIME
DIST TO GO
REMARKS
PPL Pdn 01o 17.530’ N 103o 45.300’ E 560 PPL ShpyardJr 01o 16.850’ N 103o 44.700’ E 220° 1 559 East Jurong channel
Jr jn 01o 16.500’ N 103o 45.100’ E 132° 1 558 Selat PandanSp 01o 12.500’ N 103o 40.000’ E 232° 6.5 551.5 Rasu Buoy023 01o 11.610’ N 103o 36.500’ E 256° 4 547.5 N.Nipa024 01o 06.100’ N 103o 33.100’ E 212° 6.5 541 TSS Singapore025 01o 02.350’ N 103o 39.400’ E 120° 7 534 Pulau Cula026 01o 05.050’ N 103o 43.200’ E 055° 4.5 529.5 P.Tekong027 01o 08.490’ N 103o 46.550’ E 045° 4.5 525 Helen Mar Reef028 01o 09.650’ N 103o 48.300’ E 057° 2 523 Karang Banten029 01o 13.600’ N 103o 56.750’ E 065° 9.5 513.5 Teluk jodoh030 01o 16.700’ N 104o 20.000’ E 082° 23.5 490 T.Sading031 01o 35.000’ N 104o 40.000’ E 048° 27 463 Eastern Bank032 03o 40.000’ N 104o 40.000’ E 360° 65 398 P.Pemanggil033 04o 00.000’ N 103o 40.000’ E 323° 102 296 P.Kuanan
034 04o 40.000’ N 103o 40.000’ E 360° 40 256 T.Pilur
035 05o 00.000’ N 103o 30.000’ E 331° 23 233 Kuala Merchong036 06o 15.000’ N 103o 00.000’ E 338° 81 152 Tompok Putri Saadong037 07o 15.000’ N 101o 00.000’ E 297° 134 18 Churchill Patches038 07o 15.000’ N 100o 42.000’ E 270° 18 Arrival Songkhla Anchorage
The total distance between locations is 560 nautical miles and the overall draft of the tow is to be relayed to the Master of the lead tow vessel once the legs are at the required position.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
: 023 TTL DIST. 560 NM : PPL Pandan, Singapore: Songkla, Thailand: 3.0 Kts (: Total 7 day 18 hrs 40 mnt Estimated: 3.5 Kts: Total 6 day 16 hrs Estimated: 4 Kts: 5 day 20 hrs Estimated
The above tow route will have to be reviewed by the tow master, warranty surveyor, barge master and the towing vessel master. Rig and tow vessels to ensure they are loaded with fuel for at least 20 days tow period to account for unforeseen weather conditions and other possible delays.
As per the Marine Operations Manual the bollard pull requirement for a single vessel tow in the region is 150 tons. Two vessels minimum 85 tons bollard pull.
Minimum two vessels having a total bollard pull of 250 tons are required for the final approach to the platform soft pin location
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
6. ARRIVING DESTINATION LOCATION Manta
1. When in vicinity of the destination location, a pre-approach meeting will be carried out. The rig will approach as agreed during the pre-move meeting. Permission will be obtained from field MIC before entering the 1000 m zone.
2. At a distance agreed by the Tow Master, Barge Master & Marine Warranty Surveyor from the Songkhla-E platform location, the tug will shorten tow cable and alter course onto approach heading. The final approach will be carried out at the discretion of the Tow Master and Barge Master taking into account the weather, visibility etc.
3. At an agreed distance, by the Tow Master, Barge Master & Marine Warranty Surveyor from the Songkhla-E platform location the rig will commence lowering legs to 30 feet off bottom. Maintain speed of+/- 0.75 knots. An assist tug(s) will be connected to the aft end(s) of the rig at the discretion of the Tow Master.
4. Verify proper operation of survey equipment and lower legs closer to the seabed, +/- 15 feet off bottom, if clear. Carry out manual RPD checks and adjust as necessary. Prepare rig for pinning.
5. The rig will then be maneuvered to within the tolerance limits and stabilized on the required heading. Once stabilized, the rig will be pinned at the designated soft pin location.
6. The rig will then achieve initial penetration at the soft pin location before deploying the four anchors at the recommended angles and prearranged distance. (Note: anchors will be secured on deck (kam- fork or shark jaw in locked position) of the AHTS at all times when crossing pipelines or other subsea obstructions).
7. The rig will then be winched on to the final location in a controlled manner on the anchors. The stern will be manned with radio communications at all times at the final approach.
8. Water depth is to be monitored while moving onto location taking into account tides and bathymetry. It is imperative that accurate information for the tides on the day is made available to the rig and should be sought from the survey company and/or the Operator.
9. When inside the tolerance area and agreement of all parties concerned, lower legs to 3 feet off bottom, ready for pinning. (Note: the rig needs to be positioned in a manner and accuracy that all platform slots can be reached required for the drilling program.
10. Maintain rig speed at less than 0.5 knots, and pin the rig as appropriate.
11. Once the rig is soft pinned, check to ensure the positioning equipment is functioning correctly prior to requesting acceptance from the Operator Representative.
12. Each leg may be raised and lowered to release any residual torque.
13. Once the position is accepted, either the assist or the lead tow vessel will be released.
14. The rig will be jacked to a minimal air gap as recommended by the Warranty Surveyor and will prepare for preloading operation.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
Penetration curves to paste here.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
7. PRELOADING OPERATION
Once the rig position has been accepted, jack the hull to zero air gap.
The preload operation will be carried out with the hull at a positive draft on an ebbing tide. This will allow the tide to fall out from under the hull as the tanks are filled to maintain hull placement as close to water line as possible. The draft will be decided by the Barge Master in consultation with the Warranty Surveyor and taking into account the state and range of tide.
Single leg preloading at draft will commence with the bow leg. A leg footing reaction of 9266 tonnes (20,429 kips) is to be maintained during preloading of all legs .
Preload will be held for 3 hours (static test) on all legs at minimum airgap. If the leg settles, adjustments will be made to level the hull and the 3 hours hold period will commence again. At no time during jacking should the load exceed 370 MT per pinion.
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RIG ATWOOD MANTARig Move Procedures
Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
Continuous monitoring of applied preload against achieved penetration should be carried out. This should then be compared to the predicted load penetration curve
Once the static holding period for all legs is completed without further settlement, all preload should be dumped. The towing vessel should be released from the bridle and the hull elevated to operational air gap.
Level the hull at operational air gap. Engage the fixation system, secure the jacking console and release the leg for drilling operations.
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Singapore to Block G5/43 Songkhla-E Platform LocationRig Move No: 01 Client: Coastal energy Issue Date: November 2012
8. COMMUNICATION
It is imperative that lines of communication and responsibility have been clearly defined and are understood by all concerned. It will be the responsibility of the Barge Master to ensure that these actions are complete prior to commencement of the operation. Specific attention will be made to the interface requirements of passing and recovering the anchors and handling wires between the rig and the anchor handling vessels when anchors and handling wires are being used to move the rig onto location. The Barge Master will accept, or suitably delegate responsibility, to ensure that a competent person is present on the deck while passing or recovering the tow wire and/or anchors to/from the vessel. This person will be equipped with portable VHF communications, and will be in direct contact with the anchor winch operator, the crane operator and the anchor-handling vessel Captain.
9. MEDI-VAC PLAN DURING TOW
The Emergency Response Plan for the tow with contact numbers will be used in case of any emergency requiring MEDI-VAC from the vessel during the moving operation.
10. POSITION REPORT
Position reports will be given by the lead tug every 6hrs.
11. EMERGENCY CONTACTS
MODU Shore Base Contacts
Name Title Office Mobile Email
Graham Robertson Operations Manager 8565 +66 912290831 [email protected]
Ronald Timmerman Operations Superintendent 8566 +66 912290832 [email protected]