offshore - va.minambiente.it

Offshore

Saipem 7000

Saipem 7000Saipem 7000

2

With its state-of-the-art J-lay tower, upgraded dynamicpositioning capability and fast ballasting system, theSaipem 7000 semisubmersible crane vessel has the capa-city to handle the entire workscope of offshore construc-tion developments worldwide, encompassing pipelayingin water depths greater than 2,000 metres and heavy liftoperations up to 14,000 tonnes.

The vessel's Class 3 DP system of 12 thrusters ensuresthat the vessel maintains good station keeping in themost difficult of weather conditions. Additionally, becau-se the Saipem 7000 has accommodation facilities up to725 people, the vessel can assist hook-up and commis-sioning as well as initial platform life support activities.

Altogether, this high specification means that the Saipem7000 can be counted on to provide the highest level ofreliability for conventional, deep and ultradeep waterdevelopment projects.

In support of its underwater works, the Saipem 7000operates two state-of-the-art Innovator type of workingrov's, which are an essential part of the vessel's equip-ment that complement and integrate surface and subseaoperations of the Saipem 7000.

3

4

Semisubmersible derrick Semisubmersible derrick and pipelayiHULL TYPESelf propelled dynamically positioned semisubmersible

VESSEL FEATURES • Length overall

197.95 m

• Upper platform175 m x 87 m x 8.5 m

• Lower pontoons165 m x 33 m x 11.25/15.25 m

• Depth to main deck43.5 m

• Free deck area9,000 sq. m

• Deck load15,000 tonnes

• Operating draft 27.5 m

• Survival draft18.5 m

• Transit draft 10.5 m

• Transit speed9.5 knots

CLASSIFICATION Lloyds Register and R.I.Na.

COMPLIANCENMD, HSE, USCG Rules.

SPECIAL FEATURESDesigned for tropical (+ 45° C) and arctic conditions (-20° C)

DYNAMIC POSITIONINGDP (AAA) Lloyds Register notation. IPD 3 R.I.Na.Class 3 Norwegian Maritime Directorate notation.First vessel to receive LR highest DP (AAA) notation.SDPM 31 system and standby additional back-up ofSDP 11 control station with separate computer, UPS,gyros, environmental sensors position reference systems.

and pipelaying (J-lay)ing (J-lay) DP vessel

6

Saipem 7000Saipem 7000MOORING SYSTEM 14 x 1,350 kw single drum winches, each 3,350 m x 3 3/4"mooring line and 40 tonnes Norshore III high holding power anchor.Fully redundant SDPM system.2 anchor windlasses, each 550 m x 5 1/8"chain and 34.5 tonnes anchor.

PROPULSION AND THRUSTERS4 x 4,500 kw propulsion azimuthing units, fixed pitch 4 x 3,000 kw retractable azimuthing units, fixed pitch2 x 5,500 kw retractable azimuthing units, fixed pitch2 x 2,500 kw bow tunnel units, fixed pitch.

BALLAST SYSTEM Computer controlled system with simulation capabilitiescomprising4 x 6,000 tonnes/h ballast pumps40 ballast tanks – Total 83,700 cu. m14 rapid ballast tanks – Total 26,000 cu. m

LIFTING FACILITIES MAIN CRANE2 twin Saipem 7000 model fully revolving bow mountedAMHOIST cranes. Main blocks tandem lift: 14,000 tonnes Main block single lift: 7,000 tonnes 6,000 tonnes revolving at 45 m rad./50 m tieback Aux. 1 block: 2,500 tonnesAux. 2 block: 900 tonnes Lowering capability to 450 m below sea level Whip hook: 120 tonnes 4 fully revolving hydraulic cranes 25 tonnes liftingcapacity

8

Saipem 7000Saipem 7000

9

PILE DRIVING/HANDLING EQUIPMENTAVAILABILITY2 Menck MHU 3,000 hydraulic hammers.2 Menck MHU 1,700 hydraulic hammers.2 Menck MHU 1,000 hydraulic hammers.2 Menck MHU 600 hydraulic hammers.1 Menck MHU 220 hydraulic hammer.1 Menck MHU 195 hydraulic hammer.2 underwater/surface power packs. 1 hydraulic hammer compensator. "Slim" and "Free" riding mode capability. Full spread of internal/external lifting clamps rangingfrom 20" to 102" i./o. dia. 2 levelling systems range 66" - 72" dia. - 900 t. capacity.2 external levelling systems 1,000 tonnes

HANDLING DECK EQUIPMENT1 150 tonnes AMHOIST 9299 Crawler crane1 35 tonnes hydraulic tyred deck crane2 5 tonnes fork lifts

POWER PLANTTotal power plant 70,000 kw, 10,000 Volt12 diesel generators on heavy fuels divided in 6 firesegregated engine rooms classified UMS

CREW FACILITIES388 fully AC single or double cabins for 725 personsGym, cinema, internal radio/TV, 400 seat main messroom70 seat officers messroom, recreation room, bar-cafeterias

10

Saipem 7000Saipem 7000HELIDECKSuitable for two BV234 LR Chinook helicopters (one parked).Classified helicopter refueling system.

J-LAY SYSTEMPipe diameter range from 4" to 32"Main laying tension system 525 tonnes with tensioners, up to 2,000 tonnes with friction clampsLaying tower angle 90° - 110°Abandonment/Recovery system double capstan winchwith 550 tonnes capacity (up to 2,000 tonnes with clamps)1 welding station1 NDT and field joint stationPipe string quadruple jointPipe storage capacity up to 6,000 tonnes. The tower is self erecting and removableby the Saipem 7000 own cranes.

Offshore

under construction

Castorone

spm_castorone_L01_08_11_07_v6 19-12-2008 18:05 Pagina 1

11.2

008

(Under construction)Pipelaying vessel

Classification:ABS +A1 (E), pipelaying vessel, +ACCU, +DPS3, CRC, TCM,CM, ice class A0 (IA Baltic)

Dimensions:Length (o.a.): 290 m excluding rampMoulded breadth: 39 m Operational draft: min. 7 m, max.10 mTransit draft: 6.50 m approx.Displacement: 89,000 t at 10 m operational draft

Performance:Transit speed: 14 knotsFuel consumption (transit): 80 t/dayFuel consumption (DP mode, max.): 170 t/dayBollard pull (with main propellers): 180 t

Pipelaying capacity: triple joint 12 m or double joint 18 m; pipesize 48" (60" including coating)

Cargo/tank capacity:Clear deck area: 4,300 sq.mFuel oil: 6,500 cu.mFresh water: 941 cu.mBallast water: 30,000 cu.m

Deck equipment:Main crane: 600 t @ 30 m, 350 t @ 46 mPipe handling cranes: 2 x gantry cranes 52 t @ 35 mTensioners: 3 x 250 tA/R winch: 750 tExternal double hinged ramp: 60 m longWorking stations: 3 welding + 3 completion

Propulsion system:Main gensets: 8 x 8,400 kW at 600 rpm eachEmergency generator: 1 x 1,200 kWPower distribution: 2 separate switchboards 11 kVBow thrusters: 2 x 37 tAzimuthal thrusters: 6 x 92 tMain shafts: 2 x 8,000 kW

Accommodation:702 persons

Other facilities:Mess room; offices; crew lifts; meeting rooms;gymnasium/recreation; television rooms

Dynamic positioning system:DP system: fully redundant, class 3Reference system: 2 x Hipap 500 for 3,000 m of water depth;2 x DGPS

Helideck:Suitable for Sikorsky S-61 N

Castorone

Saipem S.p.A. - Via Martiri di Cefalonia, 67 - 20097 San Donato Milanese, Milan - Italy - Tel. +39.02.520.1 - Fax +39.02.520.44415

www.saipem.eni.it - A subsidiary of Eni S.p.A.

People, ideas, energy.

spm_castorone_L01_08_11_07_v6 19-12-2008 18:05 Pagina 2

Offshore

under construction

Saipem FDS 2

spm_fds2_L01_08_09_24:Layout 1 24-09-2008 18:19 Pagina 1

09.2

008

Field Development Ship

Classification:ABS +A1, (E), +AMS, +ACCU, +DPS3, Crane Vessel,Pipelayer Vessel, Ice Class D0, PORT, HAB

Main dimensions:Length o.a.: 183.0 mLength b.p.: 171.0 mMoulded breadth: 32.2 mDepth moulded: 14.5 mDraught design: 9.5 mDraught operation mode: 8.0 mDraught scantling: 9.5 mSpeed: 13 knots Main power output (100 MCR): 6 x 6,000 kw

Propulsion system:2 azimuthal thrusters for propulsion & station keeping (5,000 kw each) 3 retractable azimuthal thrusters (5,500 kw each) 2 bow thrusters for station keeping (2,000 kw each)

Power:6 diesel generators – 36,000 kw

DP capability:DP Class 3 / ERN 99.99.97

Accommodation:325 persons on board

Main crane capacity:1,000 t – 400 m below water line

Auxiliary cranes capacity:2 pedestal cranes – 60 t each3 additional:

1 x 20 t – 2,500 m depth capacity2 x 15 t – 15 m capacity

Winches:2 capstan winches with heave compensation:

1 x 750 t1 x 500 t

ROV:2 work class ROVs (Sonsub Innovator)

J-lay tower:Capacity: 2,000 tDesigned to lay quad joints

Other equipments:Side fairleader on 3 locations (750 t capacity)Possibility to install an umbilical and flexible laying equipmentChain laying equipment (mobile) & 8 chains lockersfor 2,000 t of chainPossibility to install a removable carousel on deckCapability to lay pipes in S mode (option)

Saipem FDS 2





Description of

Dynamically Positioned Pipelay Vessel

Solitaire

Technical Specification Dynamically Positioned Pipelay Vessel Solitaire March 2008, Rev. Y

Solitaire.y

TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 DESIGN CONCEPT

3.0 OUTLINE SPECIFICATION

3.1 Basic subdivision

3.2 Certification

3.3 Machinery installation and hull systems

3.4 Electrical installation

3.5 Pipelay and pipe transportation equipment

3.5.1 Line pipe transportation

3.5.2 Double joint prefabrication plants

1.0.0 Firing line

2.0.0 Stinger

3.0.0 1000t Abandonment and recovery system

4.0.0 S-Lift

3.6 Welding systems

3.6.1 Double joint welding system

3.6.2 Main line welding system

3.6.3 Contingency, repair and fabrication welding

DRAWINGS


Solitaire.y

1.0 INTRODUCTION Solitaire is a dynamically positioned vessel, optimised for laying medium and large diameter pipelines at a very high speed. Solitaire has been operational since July 1998. Her main attributes are her large length (299.85 m excluding stinger) accommodating many workstations, and her dynamic positioning capability. As a result of the large number of welding stations, the average pipelay speed on a large project is close to double the speed of the largest competing lay vessels. Solitaire is able to install over 1000 km of pipeline in one year. Laying pipes in very deep water poses no difficulty as a result of Solitaire’s DP system, which makes anchors obsolete.

Solitaire features the Phoenix automatic welding system developed by Allseas, which was used for the first time on a pipelay contract onboard Lorelay in 1993. A new generation of this welding system was installed on Solitaire in the spring of 1998. In 2002 a dual torch version was introduced featuring improved welding quality and higher welding rates. The choice of a ship (a former a 125,000 t bulk carrier) for Solitaire rather than a semi-submersible has the advantages of a large length, a large pipe capacity in the holds (22,000 t), and a high transit speed (13 knots) making her competitive for large pipelay projects anywhere in the world. Solitaire’s large length and high roll period give her an excellent pitch and roll behaviour, so that she can continue working in waves of up to 4 - 4.5 m (13 - 15 ft) significant height. This feature, plus her independence from anchor handlers and her large buffer capacity making her less dependent on pipe offloading from supply vessels, results in a workability superior to the best competing pipelay spreads. In this document an outline specification of Solitaire’s systems is given. 2.0 DESIGN CONCEPT The pipelay vessel has been designed to meet the following requirements: • sustained layrate of 5 to 8 km/day on large diameter pipelines; • vessel workability at least equal to the workability of semi-sub lay barge spreads; • compliance to stringent requirements regarding allowable pipe stress and strain limits, therefore a large installed tension capacity and a long stinger; • compliance to the highest standards of operational safety. Severe environmental conditions such as those typical for Northern North Sea operations, have been used for the specification of the dynamic positioning system. Only a ship-shaped hull can economically offer the following advantages combined: • large firing line length; • large pipe carrying capability; • high transit speed. The workability of Solitaire is as high as that of a semi-submersible by incorporating high roll period and limited pitch characteristics in the design. A high roll period is achieved by limiting the vessel's static stability and providing it with a large radius of gyration. Favourable pitch characteristics are achieved by a large vessel length. The low mechanical breakdown percentage of a DP system, the large firing line length and computer controlled automatic welding equipment together make it possible to achieve a high daily production with high quality welds. Two traditional double-joint plants are installed for prefabrication of double-joints, which are fed to the firing line.


Solitaire.y

The use of a dynamic positioning system leads to the following advantages over the use of anchors: • no potential risk of damage to existing cables and pipelines; • fast pipe abandonment operation (in case of deteriorating weather); • less interference with other activities near platforms: possibility of working within anchor

patterns of drill rigs and moored vessels; a large freedom in selection of start-up and lay-down positions; quick start-ups and lay-downs, resulting in short presence in platform areas;

• strongly reduced mechanical downtime; • no spread downtime due to downtime of anchor handling vessels; • continuous vessel motion possible. Solitaire specifications • Length, including 140 m stinger 397 m (1302 ft) • Length, excluding stinger 299.85 m (984 ft) • Breadth, hull 40.6 m (133 ft) • Depth to main deck 24.0 m (79 ft) • Transit draught, hull 8.5 m (28 ft) • Maximum service draught 9.23 m (excluding

thrusters) • Maximum displacement 83,400 t • Pipe cargo capacity in (six) holds 14,600 - 22,000 t

(depending on pipe properties)

• Fuel oil capacity 9,159 m3 • Diesel engine power 51.5 MW (peak) • Main engines 8 x 5,850 kW • Generators 8 x 5,550 kW, 8 x

8,000 kVA • Azimuth thrusters 8 x 5,500 kW

maximum peak (intermittent) 8 x 4,300 kW maximum continuous

• Transit speed 13 knots • DP system NMD Class 3 / LRS

DP (AAA) • Welding stations: double joint - , main firing line 6 — 8 • Tension capacity 1050 t (3 x 350 t) • Abandonment and recovery winch • Four-cable abandonment and recovery system

420 t 1000 t (4*250 t)

• Maximum pipe diameter 60 inches • Accommodation 420 beds (1 and 2

person cabins) • Crane capacity pipe transfer crane (2x) • Special purpose crane (1x)

35 t at 33 m 300 t at 17 m 40 t at 57 m

• Helicopter deck capacity Chinook 234 LR and Sikorsky S-61N


Solitaire.y

3.0 OUTLINE SPECIFICATION 3.1 Basic subdivision The vessel contains from aft to forward amongst others: • 4 aftship void spaces; • 1 equipment room containing the power plant for the 4 abandonment and recovery winch pairs; • 2 equipment rooms containing the 4 abandonment and recovery storage winches and 4 abandonment and recovery traction winches; • 2 equipment rooms containing the stinger backup winches and the tail anchor winch; • 2 rear engine rooms containing the aft thrusters; • pipe storage holds; • 2 engine rooms containing the diesel electric power plant and forward thrusters; • forepeak tank. The firing line deck is located at the centre line below the main deck. The superstructure, extending from main deck to C-deck, accommodates the double joint factory with two double joint plants, the production monitoring centre, various stores, the emergency generator room and the accommodation support room. In the superstructure above C-deck, the accommodation deckhouse is situated, comprising the following auxiliary, domestic and control spaces: • general utilities and services : HVAC rooms; changing rooms; offices; hospital; • stores : bonded store; dry stores; cold stores; • communication and control provisions : communication room; DP control and navigation bridge; Solitaire is equipped with 8 x 80 persons enclosed lifeboats and 17 x 25 person life rafts. Life rafts and a fast rescue MoBo (man overboard boat) offer adequate capacity for safe evacuation of 420 persons on board. 3.2 Certification Solitaire has been built for unrestricted sailing areas, under supervision of the classification society Lloyd's Register of Shipping in accordance with the applicable rules and regulations. Solitaire, with all her equipment and outfitting, complies with all applicable international regulations including international conventions and subsequent IMO resolutions and amendments. Furthermore, Solitaire complies with the requirements of the Health and Safety Executive (UK) SI286/466/611 for which a Certificate of Compliance has been issued. In addition, a Letter of Compliance for Mobile Offshore Units (DP System Class 3) has been obtained from the Norwegian Maritime Directorate. 3.3 Machinery installation and hull systems Propulsion of Solitaire is diesel-electric. A total of 46.8 MW (peak 51.5 MW) is provided. Each of the eight diesel engines are coupled to a 10kV, three phase, 60Hz AC generator which provide power for propulsion and station keeping but also for all other services on board. A complete range of auxiliary systems supports the propulsion and station keeping system. Eight azimuthing thruster units with supporting equipment are provided. Four are installed in the stern and four in the bow. All thrusters have fixed-pitch, variable-speed propellers with a peak power rating of 5,500 kW.


Solitaire.y

3.4 Electrical installations The electrical systems have been divided in two forward and two aft systems, and in addition in port and starboard systems. Each of the two main switchboards (10 kV) is connected to four generator sets, four thrusters and production and auxiliary equipment. The electrical installation further comprises a large number of switchboards, electric motors, transformers and lighting systems. Marine automation is an integrated system which covers functions such as power management, distribution controls and monitoring. The set-up of the complete system is fully redundant, i.e., no single failure will have an effect on the operation of the vessel. The fully redundant dynamic positioning system is based on three systems: two identical control computers (1 on-line and 1 standby) and a supervisory automatic switchover computer. The DP system complies with the classification society's rules LRS DP AAA and with the NMD Class 3 requirements. Solitaire is equipped with state-of-the-art radio communication and navigation equipment and also features a fully integrated data communication system with the onshore office. 3.5 Pipelay and pipe transportation equipment 3.5.1 Line pipe transportation The number of pipe carriers or other transportation means which are employed to meet Solitaire's pipe demand, varies largely with the following parameters: • pipe joint diameter and weight; • transportation distance; • pipelay daily output; • pipe carrier capacity and speed; • loading and discharging rates. A pipe transfer process has been chosen which is capable of dealing with a variety of pipe materials and a variety of pipe carrying vessels. On both sides of the pipelay vessel, a pipe transfer crane has been fitted. Outreach of these cranes is adequate to unload large pipe carriers, which maintain their position alongside (by joystick control) at a safe distance of approximately 10 m. Supply of pipes can also be arranged with cargo barges and cargo vessels which can be moored alongside Solitaire. For these mooring operations, Solitaire has been fitted with fenders and mooring equipment. The absence of anchor wires enables unrestricted access for the largest pipe carriers or for even larger pipe transportation vessels. Two pipe supply vessels can be unloaded simultaneously by the two available pipe transfer cranes. The single joints can be transported to the pipe cargo holds over two longitudinal conveyors on the main deck and using the overhead cranes on main deck and in the cargo holds. Besides storage, the unloaded single joints can also be moved directly into the central bevel station of the double joint factory. The onboard transportation and storage capacity is sufficient to accommodate peak supply rates. A situation plan and a cross section of pipe transfer operations are presented on following pages. In the case of interruptions of the pipe supply flow, the large buffer storage capacity ensures continuity of the pipelay process. When weather conditions do not permit pipe offloading, Solitaire can continue pipelaying using up the buffer quantity of pipes in the hold.


Solitaire.y

3.5.2 Double joint factory The double joint factory consists of two identical production lines that are situated at main deck level on the vessel’s starboard side. Single joints are centrally supplied by a conveyor to a central bevel station equipped with 4 pipe-facing machines, two for each single joint. From the bevelling station, the single joints are transported to the line-up stations of each of the two double joint production lines. The welding stations normally utilise submerged arc welding (single or twin arc) but can be modified to use other welding techniques such as gas metal arc welding or gas tungsten arc welding. In the case of using submerged arc welding, the first pass is welded with the no-tack method. Subsequently, the double joint is transported into the second and third welding station. The third welding station is able to simultaneously use external and internal welding by means of a remotely operated internal boom. The double joint is then transported to the NDT bay via the fourth (normally not used) welding station by means of a longitudinal conveyor. Upon completion of NDT, the double joint is moved forward to the waiting area where the double joint may be re-routed in the unlikely event of a weld repair or simply awaits transportation to the elevator between the double joint factory and the firing line deck. The elevator transports the completed double joint to the main firing line level. Field joint coating of the double joint weld is carried out in the main firing line. 3.5.3 Firing line The main firing line receives the completed double joint at the “ready-rack”, which is a walking beam conveyor system that moves the double joint to the line-up station. Ultimately the line-up overhead crane will be used to lift the double joint from the walking beam conveyor onto the line-up station. Preheating, pipe tally and welding band positioning takes place at the ready-rack. In addition, a hatch is situated directly above the line-up station to allow for efficient transportation of pipeline heads, side taps or T-pieces from the A-deck into the line-up station. The firing line consists of the following main components: • 8 workstations, spaced at 24.4 metres; • 3 intermediate workstations to complete the double joint field joint coating; • NDT station (X ray or AUT); • 3 tensioners (350 t each); • (driven) track type roller supports in between the work stations; • roller supports after the coating stations, which allow passage of uncured field joint coating. Welding trolleys provide a work platform for the welding operators and the welding equipment. Each trolley is equipped with automatic welding systems, storage space for welding consumables, electrical power, water, working air and gas supplies. A maximum of four welders and welding systems can be accommodated per trolley. The trolleys can be brought into contact with the pipe and therefore move simultaneously with the pipe. Using this method the welding operators will not be hindered by a moving pipe as a result of ship motions. Once Solitaire moves forward 24.4 m to make a so-called 'pull', the welding work platforms (trolleys) are temporarily disconnected from the pipe. The trolleys are moveable by means of individual drive systems on rails, which are integrated in the firing line floor foundation. The NDT Station is located between the second and third tensioner. All tensioners have been designed to allow the passing of T-pieces and other structures. A walkway for transfer of personnel is located along the starboard side of the main firing line. This walkway has entrances to the firing line at the workstations.


Solitaire.y

Transport of equipment and consumables to the firing line is performed via routes from main deck using elevators, hoists, monorails and pallet trucks. The firing line is inclined in the aft section of the vessel. The total length of the firing line within the hull is approximately 225 m. A secondary firing line for pipe diameters up to 6” in diameter has been installed to enable Solitaire to lay a so called ‘piggy-back’ line on top of the main pipe line. An elevated platform in the firing line provides two double joint stations, a ready rack and a firing line with two welding stations, two NDT stations and two coating stations. An extension of the tweendeck provides space for strapping of the piggy-back line. During normal pipelaying, the piggy-back platforms that form the elevated work platform are hinged up ward, and various items are removed and stored for future use. 3.5.4 Stinger The stinger structure is connected at the stern of the pipelay vessel to support the pipe. Its length is 140 m and has an external width of approximately 8 m. The stinger structure is comprised of four main sections, of which the last three are coupled by means of hinges and pup-pieces to allow adjustment of the sections relative to each other. The first two sections are new-built and were installed in March 2005. The adjustable sections enable different stinger radii (from 80 m to 300 m), including a radius allowing for a nearly vertical departure angle for deepwater pipelay. The connection between sections 2-3 and 3-4 have been fitted with a quick stinger adjustment system. This system allows changing of the pup piece lengths between the sections within a few hours without additional mobilisation. A hang-off trunnion is located at the end of the cantilever to bear the stinger during the changing of the pup-piece length. The connection between sections 1 and 2 consists only of two lower hinge points, allowing radius adjustment during pipelay. The stinger is connected to the vessel by means of two hinges. The stinger hinge position can be set at three different heights. A main hinge adjustment system allows fast and safe setting of the hinge position. The stinger can be rotated from the working position upwards to the survival position by the primary stinger handling system. This system is located on top of the outriggers, and consists of two hydraulically operated skids which can be locked in a range of positions. The skids are connected to the stinger by means of a rigid fixing frame. As a back-up, the stinger is further suspended from wires that hang from the cantilever which connects to the top of the cross-over. These wires are connected to the stinger back-up winches inside the vessel. The general layout of the stinger with 300 m, 225 m and 150 m radius and the position in survival condition, is presented in a drawing at the end of this booklet.. Two “heel” structures safeguard the stinger against horizontal loading. To reduce drag during transit, they can be rotated out of the water. The heels can be fitted with 6 m long tips for deepwater projects. In shallow water these tips can be removed, so that the DP thrusters determine the minimum operational water depth. The mooring winches are used to rotate the heels out of the water. During transit they are fixed to the side of the vessel using a retractable pin system. Solitaire can compete with the largest J-lay barges in terms of water depth and pipe weight capability. 3.5.5 1000 t Abandonment and recovery system The current cable manufacturing capacity is limited to 650 t minimum breaking load, which is insufficient to accommodate the loads of 1000 t for which Solitaire has been designed. Therefore a four-cable system has been installed. Four storage winches, each containing 4700 m of 3.625”, and four traction winches, each capable of 250 t tension, have been installed in hold no. 4.


Solitaire.y

Sheaves placed under the central firing line guide the four cables to the bow of the vessel, where they are guided over a return sheave assembly which includes a motion compensator. The four cables are connected with the pipe by means of a newly designed and constructed 1000 t A&R cable connector. 3.5.6 S-Lift For pipelay projects featuring lay tensions higher than the available tensioner capacity of 1050 t in large water depths, Allseas has developed a new lay concept named S-Lift. With this method the pipeline can in future be additionally supported under water by pipe clamps. The pipe clamps will be suspended from the cantilever structure installed on top of the crossover extending 62 m aft of Solitaire’s stern. In this way the majority of the pipe load will be taken on below the stinger, which results in a normal load situation on the stinger and in the tensioners. The system can be used either to provide contingency holding in case of pipe flooding, or for continuous pipelay. For contingency holding, one clamp will be deployed; for continuous pipelay two clamps will be deployed, working according to the linear winch principle. The linear winch principle implies that one clamp will hold the pipe while the other can be relocated to the new holding position. With this system, Solitaire will be able to lay pipe in S-mode starting in shallow water and continue into deep water at very high tensions. Once Solitaire reaches the water depth where the tension becomes too high for the tensioners, the S-Lift will be deployed. The presently envisaged capacity of the system is 1500 t static tension with the possibility for a further upgrade. The steel cantilever structure has been installed and currently serves as the stinger support structure, but in the future it will be made ready to be used for S-lift. 3.6 Welding systems 3.6.1 Double joint welding system The double joint welding system features submerged arc welding using programmable welding equipment and pipe manipulators. Pre-programmed and qualified parameters are used for each pass. Each of the two production lines has three welding stations. Every welding station is equipped with external welding heads using either single wire or twin-in tandem wire. The third welding station features a remotely operated internal boom using single wire for back-welding of the externally applied root pass on pipe diameter of 16 inches and over. Line-up is performed by means of a 'no-tack' unit ensuring a closed root gap when using submerged arc welding the first external pass. Alternatively, and for pipe diameters below 16 inches, either manual shielded metal arc welding or Phoenix (see below) can be used for welding of the first few passes. 3.6.2 Main line welding system The main line is equipped with the 2nd generation Phoenix automatic welding system, which has been designed, manufactured and installed by Allseas. In 2002 a dual torch version was introduced featuring improved welding quality and higher welding rates. The essential welding parameters of each welding bug are controlled by computer as a function of weld pass number and location on the pipe circumference. All passes are applied externally with the root pass using retractable backing shoes positioned on the internal line-up clamp. This ensures positive and controlled penetration of the root pass, even when the pipe misalignment is unfavourable. It further eliminates the unsafe practice of personnel entering large diameter pipe in production for manual root pass touch-ups in case of misfiring the arc.


Solitaire.y

The Phoenix system can readily utilise gas metal arc welding, pulsed gas metal arc welding, flux-cored arc welding or combinations thereof, and is also convertible to gas tungsten arc welding. All welding bugs can use these processes in all passes at any station in both the uphill and downhill welding directions. When used for downhill gas metal arc welding, as commonly used for pipeline welding, Phoenix can either utilise a single head or a dual head mode on each welding bug. The dual heads are located on either side of the pipe in each welding station. All welding torches are provided with tip fume extraction. 3.6.3 Contingency, repair and fabrication welding Shielded metal arc welding, flux-cored arc welding or gas tungsten arc welding, or combinations thereof, are used for repair welding. These processes can be made available in all workstations as well as for structural fabrication.

Balder

Data Sheet

The Balder was built in Japan in 1978 by Mitsui Engineering & Shipbuilding Company Ltd., and is the

sister vessel of the Hermod. The ship is 505 feet long and 282 feet wide. Its draft is currently 36

feet, but during our work we take in ballast water to increase the draft to 82 feet. This principle is

known as semi-submersible.

The Deepwater Construction Vessel (DCV) Balder is capable of a tandem lift of 6,300 t (6,945 short

tons). The cranes provide for depth reach lowering capability as well as heavy lift capacity to set

topsides. This multi-functional dynamic positioned DCV is tailored for the installation of foundations,

moorings, SPARs, TLPs and integrated topsides, as well as pipelines and flowlines.

DCV Balder provides a toolbox for Deepwater field development up to 3,000 m waterdepth. The

toolbox consists of:

� DP class III

� Large workdeck area

� Dual crane capability

� J-lay system

� Mooring line deployment winch

� Deepwater lowering capability

� Deepwater pile installation capability

DCV Balder was converted and commissioned in 2001/2002 and has successfully executed various

projects since.

Dimensions

Length overall 154 m 505 ft

Length of vessel 137 m 450 ft

Width 86 m 282 ft

Width of Deck incl. TSM & Fairleaders 105.5 m 346 ft

Depth to work deck 42 m 138 ft

Draft 11.5 - 28.2 m 38 - 92 ft

Draft (Incl. Thrusters) 4.5m Under Hull -

GRT 48,511 t -

NRT 33,938 t -

Accommodation / Helicopter Deck

The living quarters are equipped to accommodate 367 men. Additional quarters, installed in January

2007, provide accommodation for 392 men. All quarters have heating and air conditioning facilities.

The helicopter deck is suitable for a Sikorsky 61-N.

Life-saving / Fire-fighting

Life-saving and fire-fighting equipment according to the latest governmental requirements.

Propulsion / Power

Propulsion by two electrically driven, controllable pitch propellers of 4,400 kW each in short

nozzle. Seven thrusters of 3,500 kW Fixed Azimuth Thrusters Type LIPS FS3500-571/NU. Power

supply by six diesel driven main generators of 2,765 kW each. The 6 DP Thrusters are supplied

by six diesel driven generators of 4,000 kW (5,000kVA)

Mooring System

12 Delta Flipper anchors of 22.5 tons each, on wire ropes of 4,500 meters (15,000 ft) long.

Minimum breaking strength 386 t.

Diving System

Containerized saturation diving system with diving bell can be made available.

Portside Crane

Main hoist guyed 3,000 st 26 – 33.5 m 86 - 110 ft

Main hoist revolving 2,200 st 26 - 27.5 m 86 - 90 ft

Auxiliary hoist 1100 st 28.6 - 123 m 93.8 – 403.5 ft

Whip hoist 75 st 30.8 - 127 m 101 - 416 ft

Starboard Crane

Main hoist guyed 4,000 st 24 – 37.5 m 80 - 123 ft

Main hoist revolving 3,300 st 24 – 33.5 m 80 - 110 ft

1st Auxiliary hoist 1,000 st 27.2 - 84 m 89 - 276 ft

2nd Auxiliary hoist 660 st 30.8 - 95 m 101 - 312 ft

Whip hoist 250 st 36.7 - 113 m 120 - 371 ft

Main Hoist Lifting Height

Maximum lifting height of 3000 crane main hoist: 116 m

Maximum lifting height of 4000 crane main hoist: 98 m

SB Aux Hoist Plumbing Depth

Lowering capacity of 4,000 crane auxiliary hoist: 400 st at 3000 m below water level at minimum

radius. Subsea lowering capabilities are project specific engineered for the use of SB crane / A&R

(Abandonment & Recovery) Winch and MLD (Mooring Line Deployment) Winch.

Tandem Lift

Main hoist 6945 Sht at 33.5 meters (100 ft) radius.

Ballast System

Static and dynamic ballast system both fully computer controlled. Ballast pump capacity 8,000 cubic

meter/hour. Dynamic ballast water handling 500 t/sec.

Pipelay Equipment

A Multi-Joint Pipe Handling system is fitted on the Balder PS deck designed for the handling of the

following type of pipes; Single wall diam. 4.5”–32”, Single wall pipe with buoyancy max diam 50”.

Pipe-in-Pipe diam 6”–24”, outer pipe diameters 10" - 30", External insulated pipe, Heat traced pipe.

J-lay tower and A&R system specifications are given separately.

Mooring Line deployment Winch

MLD-winch system specifications are given seperately

Dynamic Positioning System

The Balder is equipped with a Class III Dynamic Positioning system with the following

characteristics:

Thrusters

7 x 3,500 kW - 360 degrees azimuth, total

thrust 385 t;

2 x 4,400 kW Propulsion Units may also be

used for DP Purposes Modes of Operation

� Manual

� Joy-stick

� Auto-pilot

� Full DP mode

Special DP functions

� Auto Track Mode / Pipe lay Mode

� Heavy lift Mode

� Follow Target / Floating object Mode

Position reference systems

� Redundant satellite DGPS system

� 1 x Artemis Mk IV

� 2 x acoustic SSBL/LBL (HiPap)

� 2 x Fan-beam laser-systems

� 1x LTW Taut wire System 500 m max

depth

� External force compensation

Deckload / Transit Speed

� Deck load capacity 20 tons/square meter

� Total deck load capacity 8,000 tons

� Transit Speed Pending on Loading condition Max. 6.5 Kn

Balder: J-Lay System HMC's open J-Lay Tower allows structures to be installed with one vessel:

� Templates

� Inline Tee Assemblies (ITA)

� Pipeline End Manifolds (PLEM)

� Installation of larger and integrated or multi-functional in-line structures

Benefits

� Improved project structure

� Reduced mobilization costs

Features

The DCV Balder J-lay tower has been designed with three main features:

� Hoisting capacity of 1,050 t

This provides the possibility of field development in a water depth of 3,500 m. The J-Lay

tower holding capacity is a 1,210 t (static) which results in the following graph for pipe

diameter versus waterdepth:

� Use of collars instead of tensioners

This system replaces friction based systems (tensioners) and provides less risk in the event

system failure of dropping the pipe.

To ensure maximum safety HMC has chosen a J-lay method using collars which are

suspended in a hang-off table in the tower. These collars also act as buckle arrestors and

consequently reduce the length of a propagating buckle to a maximum of 73 m.

The alternative of using a friction based system to grip the pipe (i.e. tensioners) was found

more vulnerable for failure for the extreme requirements of the Balder J-lay system.

Typical J-Lay Collar

Head Clamp and Hang-off Table

� Open tower concept allowing installation of in-line structures

Deepwater field developments are a combination of pipelines and structures like templates,

Inline Tee Assemblies (ITA), PipeLine End Manifolds (PLEMs). etc. Using the open J-lay

tower, all these structures can be installed with one vessel, improving the project schedule

and reducing mobilisation costs.

Offshore

under construction

Saipem FDS 2


09.2

008

Field Development Ship

Classification:ABS +A1, (E), +AMS, +ACCU, +DPS3, Crane Vessel,Pipelayer Vessel, Ice Class D0, PORT, HAB

Main dimensions:Length o.a.: 183.0 mLength b.p.: 171.0 mMoulded breadth: 32.2 mDepth moulded: 14.5 mDraught design: 9.5 mDraught operation mode: 8.0 mDraught scantling: 9.5 mSpeed: 13 knots Main power output (100 MCR): 6 x 6,000 kw

Propulsion system:2 azimuthal thrusters for propulsion & station keeping (5,000 kw each) 3 retractable azimuthal thrusters (5,500 kw each) 2 bow thrusters for station keeping (2,000 kw each)

Power:6 diesel generators – 36,000 kw

DP capability:DP Class 3 / ERN 99.99.97

Accommodation:325 persons on board

Main crane capacity:1,000 t – 400 m below water line

Auxiliary cranes capacity:2 pedestal cranes – 60 t each3 additional:

1 x 20 t – 2,500 m depth capacity2 x 15 t – 15 m capacity

Winches:2 capstan winches with heave compensation:

1 x 750 t1 x 500 t

ROV:2 work class ROVs (Sonsub Innovator)

J-lay tower:Capacity: 2,000 tDesigned to lay quad joints

Other equipments:Side fairleader on 3 locations (750 t capacity)Possibility to install an umbilical and flexible laying equipmentChain laying equipment (mobile) & 8 chains lockersfor 2,000 t of chainPossibility to install a removable carousel on deckCapability to lay pipes in S mode (option)

Saipem FDS 2





offshore - va.minambiente.it

Documents