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1、Guide for Lay-Up and for Reactivation of Mobile Offshore Drilling Units 1986 American Bureau of Shipping Incorporated by Act of the Legislature of the State of New York 1862 O 1986 American Bureau of Shipping 45 Eisenhower Drive P.O. Box 910 Paramus, NJ 07653-091 O Second printing 1986 Copyright Ame
2、rican Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 FOREWORD This Guide has been prepared by the American Bureau of Shipping to assist Owners in t
3、he lay-up and reactivation of Mobile Offshore Drilling Units. These guidelines are of a general nature due to the wide variety of MODU configurations, geographic and climatic conditions of lay-up sites and degree of maintenance during lay-up, and are therefore intended solely for guidance purposes.
4、Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS TITLE*GLRMD 86 0651102 0002796 590 GUIDE FOR LAY-UP OF M0BU.E OFFSHORE DRILLING
5、 UNITS If requested by the Owner, the American Bureau of Shipping will undertake to review, survey and confirm by issuance of a factual Lay-up Report, the actions taken to preserve and protect a unit in lay-up. Outlined below are precautions and procedures suggested to accomplish this objective, how
6、ever it is recognized that there may be a variety of equally satisfactory approaches to accomplish the same objective. 1.1 LAY-UP SURVEYS 1.1.1 1.1.2 1.1.3 When the Bureau is notified by the Owner that a unit has been laid-up, this status will be noted in the units survey status and in the RECORD, a
7、nd surveys falling due during lay-up may then be held in abeyance until the unit reactivates at which time they are to be brought up-to-date. Please refer to 6.1 for details. In the case of units which have been laid up for an extended period (six months or more), the requirements for the Reactivati
8、on Survey are to be specially considered in each case, due regard being given to the status of surveys at the time of the commencement of lay-up, the length of the lay- up period and the conditions under which the unit has been maintained during that period. Where the initial lay-up preparations and
9、 procedures have been submitted to the Bureau for review and survey, and re- verified annually by survey, consideration may be given to deducting part or all of the time in lay-up from the progression of survey intervals, or to modifying the requirements for up-dating surveys at time of reactivation
10、. 2.1 CERTIFICATION STATUS Some flag Administrations (e.g. Panama, Liberia, USCG) require that all Classification Surveys on laid-up units be kept up-to-date if the Owner wishes to maintain a valid IMO MODU Code Certificate or International Loadline Certificate. If the MODU Code or Loadline Certific
11、ate is allowed to expire during lay-up then a complete initial-certification type survey may be required by these Administrations at the time of reactivation. All Owners of laid-up units with U.K. Department of Energy (DEN) Certificates should be aware that if the DEN Certificate is allowed Copyrigh
12、t American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS TITLESGLRMD Bb M 0651i502 0002797 Li27 to expire due to non-compliance with the require
13、ments for Annual or Major Surveys, then a complete initial-certification type survey to the latest regulations will be required at the time of the units reactivation. If so requested therefore, ABS will continue DEN surveys while a unit ia in lay-up. Functional, system, safety and electrical testing
14、 may required at the time of reactivation. ABS recommends that the Owner of any unit that has been certified to national or international requirements make provisions to keep related survey requirements up-to-date in order to avoid problems as mentioned above. 3 . 1 SAFETY AND PROTECTION 3.1.1 3 . 1
15、 . 2 3.1.3 3.1.4 Sufficient and qualified personnel should be available in order to maintain full-time fire, leakage, moorings and security watch of the unit. In addition, efficient independently-powered fire and bilge flooding alarms with exterior warning lights should be fitted for the machinery s
16、paces, bilges and for other locations as deemed appropriate. The available watchmen should include a barge engineer and other personnel capable of operating the emergency communications equipment and taking emergency action pending arrival of outside assistance for fire extinguishing, leakage pumpin
17、g, mooring adjustment or release, and general security. This includes the operation of the necessary emergency power sources, pumping units and any active fixed fire control apparatus. Qualified personnel for emergency ballasting in hurricane areas should be considered. All the units fire safety equ
18、ipment including emergency fire pump should be proved in good order immediately prior to lay-up and maintained prepared for immediate use thereafter. The units fire lines should be proved in good condition before draining. Drains should then be kept only sufficiently open to allow drainage of conden
19、sate. Alternatively, the fire lines may be filled with inhibited fresh water, including anti-freeze if necessary. The International Shore Connection should be loosely installed and its location prominently marked. Fire line valve stems should be freed- up and lubricated. Oxygen breathing apparatus a
20、nd flotation escape equipment should be provided and maintained immediately available for the watchmen or lay-up crews. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking perm
21、itted without license from IHS -,-,- -_ - _ _ _ _ - ABS TITLE*GLRMD 46 0653302 0002798 3b3 m 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.1 1 3.1.12 All ventilator and air intake or exhaust openings should be adequately covered. Supply and exhaust openings for necessary emergency diesel generator or fir
22、e pump engines should be arranged for immediate or automatic opening. All fire dampers should be freed-up and then secured in closed position. All fire division doors should be closed. Effective and reliable means of communication such as an independently-powered radiophone should be provided for al
23、l-hours contact with firefighting, tug and rescue facilities, or central security base. A secondary communication system should be provided in the event of failure or damage to the primary means. A source of power for providing emergency lighting, fire extinguishing water, and bilge pumping througho
24、ut the unit should be immediately available. Where the emergency source of power is a portable diesel generator set mounted on deck, care should be taken to ensure fire safety of the fuel and exhaust systems, fire extinguishing arrangements, weather protection, proper electrical installation and ele
25、ctrical protective devices for the unit. All loose flammable materials such as debris, oily rags, cotton waste, chemicals, additives, corrosives, old pyrotechnics, matches, unsealed painting oils and dregs, garbage, etc. should be removed from the unit. Arrangements should be made for safe containme
26、nt and frequent removal of garbage produced by watch personnel. All mud and cement storage, mixing and holding tanks together with associated piping, and shale shaker systems should be clean and gas-free. Machinery space bilges should be pumped dry and cleaned of all debris, oil or other flammable p
27、roducts. Fuel and lube oil tanks should be wired or locked closed at the tank valve (except where required for the emergency power supply engine). All valves to or from the sea on floating units should be wired or locked closed except those actually required for use during lay-up in connection with
28、emergency ballasting, fire extinguishing, pumping out, or watch personnel service. In order to prevent excessive fouling and choking, the sea suction openings (except for emergency fire pump) should be covered over externally and/or protected with a slow-acting biocide. Copyright American Bureau of
29、Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS TITLE*GLRMD Bb Ob5iIiIO2 0002799 2TT W 3.1.13 On floating units, the anchor windlass should be proven to be
30、in good order prior to lay-up, and anchors, chains or mooring cable checked. Where used as part of lay-up mooring arrangements, the chains or mooring cable should be regularly checked for twists and chafing and shifted or padded as necessary. If not required for the mooring, one anchor should be pre
31、pared for emergency release. See also 5.1. 3.1.14 Hot work be. welding or burning) should not be permitted during lay-up except under specially supervised safety control. No unshielded or open-flame devices such as portable heaters should be permitted on board. Safe smoking areas, if required, shoul
32、d be clearly marked. 3.1.15 The unit should be readily accessible and approachable for shore-based or floating firefighting and other emergency equipment at all times and tides. 3.1.16 In the event of an emergency tow from lay-up while in deactivated condition, a towing pendant should be available.
33、If the unit is a drillship, the propeller shaft should be blocked from turning by some positive means. The turning gear should not be used for this and should only be engaged when in use. The rudder also should be hydraulically locked or otherwise blocked amidships. 4.1 PRESERVATION AND MAINTENANCE
34、4.1.1 HULL AND DECK EQUIPMENT The primary objective of lay-up preservation is to protect the hull and deck equipment against accelerated corrosion, weathering damage, and freezing. a. The units external coating systems should be in good condition prior to lay-up. Consideration should be given to sup
35、plemental sacrificial anodes on submerged areas; e+, externally along the sideshell, on lower hulls or pontoons, columns and bracing members, legs, mats, spud cans, and in ballasted tanks. b. Impressed-current cathodic hull protection systems where fitted, should be maintained in operation if a cont
36、inuous power source is available and readings logged weekly by watch personnel who should be advised of proper procedures in case of abnormal readings. If the unit is moored to another unit or shore power ia used, the system may need to be modified or secured duc to possible electrolytic interaction
37、. This should be taken up witti the system rrianufacturer. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking permitted without license from IHS -,-,- C. d. e. f. g* h. i. j-
38、k. 1 . m. - . - _ -_ ABS TITLE*GLRMD 86 = Ob53302 O002800 843 W Deck machinery should be thoroughly lubricated and operated in all modes before securing. Also refer to “Machinery“ or “Electrical Installation“. The accommodation spaces, deck, and other hull water, steam and air piping should be drain
39、ed and/or blown clear and dry with air. Alternatively, they may be completely filled with chemically inert anti-freeze liquid compatible with the piping or tubing material. This latter should be carried out under the guidance of a chemical specialist. Salt water lines, including tank washing apparat
40、us, should be flushed out with fresh water, drained and blown dry. (Please note that this will require a good supply of fresh water on arrival at lay-up site). The drill floor, derrick, substructure, and rotary table should be cleaned of all mud and grease. Drill floor and substructure drain holes a
41、nd drain wells should be cleared to insure proper draining of rain water. Jacking units, skidding apparatus, and raw-water tower jacking gear assemblies should be cleaned and unprotected surfaces coated with a protective coating. Air vents for water tanks and fuel oil may be left open. Flame arresto
42、r arrangements on fuel tanks and adjacent cofferdams should be in good order. Empty tanks should be ventilated as much as possible and condensate regularly removed or inhibited. Supplemental anodes and inhibitors should be considered for ballast tanks containing water. All doors and side scuttles sh
43、ould be kept closed and deadcovers in place, except where in regular use by watch personnel. Machinery casing top openings and skylights should be kept closed and weather tight. Hull hydraulic systems should be kept completely full of fluid. All hydraulic cylinders and ram assemblies should be actua
44、ted periodically to ensure capability for proper operation. Wire radio antennae should be lowered and secured except for emergency communications antenna. All loose items on deck should be properly secured against movement by wind or other external forces. All exposed navigation equipment, drillers
45、consoles, derrickmans console and any other exposed gauge and meter panels should be protected with weathertight covers. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:05:26 MDTNo reproduction or networking per
46、mitted without license from IHS -,-,- n. O. P* 4. r. Galley exhaust grease collection apparatus should be cleaned. If in use by watch personnel, it should be re-cleaned monthly. Portable water tanks not in use by watch personnel should be drained and left open for free ventilation. Alternatively, th
47、ey may be left completely filled if not subject to freezing. All deck electrical receptacles should be closed up weathertight. Deck mounted electrical or hydraulic controls should be protected by a weathertight cover. Crane booms should be down and secured. Exposed wire rope such as for cranes, derr
48、ick falls, riser tensioner wire, lifeboat falls and mooring wires should be slushed with Preservative grease, and where possible, removed from the blocks and stowed out of the weather. Fibrous mooring ropes and other cordage not in use should be stowed off the deck and out of the sun and weather. Exposed deck fittings liable to corrosion seizing, such as hinges, clips, screw-dogs, roller fairleads, boom fittings and valve stems should be coated or injected with preservative grease. 4.1.2 MACHINERY SPACES MACHINERY AND DRILLING EQUIPMENT The machinery and related engine r