presents the - Dynamic Positioning · 2015. 1. 8. · WARTSILA VASA 32 100% = 416 KW / CYL = 558 HP / CYL 110% = 458 KW / CYL = 614 HP / CYL 4 each V-12 + 2 each V-12 D/G Skids =

presents

the

“Discoverer Enterprise”

Dynamic Positioning RulesClass 2 vs. Class 3

DYNOS AUTRO (DP CLASS 3)

Redundancy Requests:DP control station with twoindependent controls. Oneadditional control stationadjacent to, but segregate andseparate from the main controlstation.

Redundant in the event of singlefailure:Single failure included in DP Class2 plus all equipment in anyinvolved watertight and fireintegrate compartment.

POSMOOR ATADYNPOS AUTR (DP CLASS 2)

Redundancy Requests:DP control station with twoindependent controls. Additionalback-up control station is notrequired.

Redundant in the event of singlefailure:Any active component or system(generators, thrusters,switchboards,remotely controlled valves, cables,manual valves etc.).

ARRANGEMENT ONDISCOVERER ENTERPRISE

Redundancy Requests:DP control station with threeindependent voting controllers.

DP Class 2+.

Redundant in the event of singlefailure:Yes- generators, switchboards,electric cables, critical piping andvalves.No- thrusters not W.T. with respectto one another. Three DPcontrollers together.

Page 1



Power Systems:The power systems should bedivided in two or more sectionsseparated by at least A60 classfire divisions.

General:For equipment class 3, redundancyof all components and physicalfire and water integrateseparation of all active andpassive components.

POSMOOR ATA DYNPOS AUTR (DP CLASS 2)

Power Systems:The power systems should be divided in two or more sections. In the event of failure of one system the other will remain inoperation. Single bus tie breakers may be closed during normal operation, but automatically opened upon failure.

General:For equipment class 2, redundancyof all active components.


Power Systems:Meet DP Class 3.

Page 2



Generator and prime movers:Redundant, separatecompartments.

Main Switchboards:At least two normally open dualbus-ties in separate compartments.

Bus-tie Breaker:Two (for each segregation).

Distribution system:Redundant, through separatecompartments.


Generator and prime movers:Redundant

Main Switchboards:One with single bus-tie.

Bus-tie Breaker:One.

Distribution system:Redundant


Generator and prime movers:Meet DP Class 3.

Main Switchboards:Meet DP Class 3 except breakersnormally closed.

Bus-tie Breaker:Meet DP Class 3.

Distribution system:Meet DP Class 3.

Page 3



Power management:Yes.

Arrangement in thrusters:Redundant in separatecompartments.

Auto control, number of computersystems:Two in one compartment plus onein a separate control station.

Manual control joystick with autoheading:Yes.


Power management:Yes.

Arrangement in thrusters:Redundant.

Auto control, number of computersystems:Two.



Power management:Dual power management.

Arrangement in thrusters:Redundant in A-O separatecompartments. Could upgrade.

Auto control, number of computersystems:Triple redundant in one compartment(voting). Could establish separatecontrol station.


Page 4



Single levers for each thruster:Yes.

Positioning reference system:Three, where one is assigned to aseparate control station.

External wind sensors:Two, where one is assigned to aseparate control station.

Vertical reference system:Two.


Single levers for each thruster :Yes.

Positioning reference system :Three.

External wind sensors :Two.

Vertical reference system:Two.


Single levers for each thruster :Yes- hard wired to thrusters.

Positioning reference system :Three.

External wind sensors :Three- one to each computer.

Vertical reference system:Three- one to each computer.

Page 5



Gyro compasses:Three.

Other necessary sensors:Two.

Uninterruptable power supplies(UPS):One plus one in separatecompartment.

Alternative control station forback-up unit:Yes.


Gyro compasses:Two.

Other necessary sensors:One.

Uninterruptable power supplies(UPS):One.

Alternative control station forback-up unit:No.


Gyro compasses:Three- one to each computer.

Other necessary sensors:Dual Acoustic Position Reference. Two DGPS. Two Riser Angle.

Uninterruptable power supplies(UPS):Three.

Alternative control station forback-up unit:No.

Page 6

H:\ENG\D-ENT1017.PPT

ENVIRONMENT

WIND = 82.0 KTS

CURRENT = 2.3 KTS

Hsig = 39.4 FT

DISCOVERER ENTERPRISE% Of Available Thruster Power to Maintain on Station

Survival Condition : 50-Year Hurricane

0

20

40

60

80

100

1200

1020

30

40

50

60

70

80

90

100

110

120

130

140150

160170

180190

200210

220

230

240

250

260

270

280

290

300

310

320

330340

350


0

20

40

60

80

100

1200

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350


Loop Current: 10-Year Storm

ENVIRONMENT

WIND = 33.0 KTS

CURRENT = 3.2 KTS

Hsig = 11.8 FT



Maximum Stationkeeping: 50-Year Winter Storm

0

20

40

60

80

100

1200

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

ENVIRONMENT

WIND = 47.0 KTS

CURRENT = 0.9 KTS

Hsig = 24.0 FT



Normal Operating: 1-Year Storm

180

0

20

40

60

80

100

120 1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

3500 ENVIRONMENT

WIND = 38.7 KTS

CURRENT = 0.7 KTS

Hsig = 15.0 FT



61 knot wind environment

0

20

40

60

80

100

1200

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

ENVIRONMENT

WIND = 61.0 KTS

CURRENT = 0.0 KTS

Hsig = 0.0 FT

Transocean Offshore, Inc.Discoverer EnterpriseEnvironmental Criteria Consideredfor Vessel Station Keeping

Gulf of Mexico Conditions: Hurricane- 50 year return (maintain heading only) Wave Height 12 meter significant Wind Speed 42.2 meter/second Sea Current 1.16 meter/second

Winter Storm- 50 year return (maintain heading and station) Wave Height 7.3 meter significant Wind Speed 24.2 meter/second Sea Current 0.46 meter/second

Model tests demonstrated that the vessel can maintainstation with beam winds of 28.3 meter/second (55 knots)with 80% rated thrust.

HEAVE COMPARISONHEAVE COMPARISONME 4500 SEMIME 4500 SEMI vs vs. ENTERPRISE DRILLSHIP. ENTERPRISE DRILLSHIP

0

5

10

15

0 5 10 15 20 25 30

Sig Wave Height (Ft)

Hea

ve R

esp

on

se(S

ig H

eave

, Ft)

Enterprise ME 4500

TRANSOCEAN ENTERPRISETRANSOCEAN ENTERPRISE

Current = 1.0 Knots, Hsig = 15.0 Feet

0.0

20.0

40.0

60.0

80.0

100.0

120.0

010

2030

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350


Current = 2.0 Knots, Hsig = 24.0 Feet

0.0

20.0

40.0

60.0

80.0

100.0

120.0

010

2030

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350


Transocean Offshore, Inc.Discoverer Enterprise

Vessel Data Highway System

The DP controls and power management is integratedinto an overall vessel IAS (Integrated AutomationSystem) distributed throughout the vessel via a dual andredundant data highway to the various process stationsand operators consoles located around the vessel. TheIAS includes:

DP (Dynamic Positioning)EMP (Environmental Monitoring and Vessel Data)VMS (Vessel Management System)PMS (Power Management System)F&G (Fire and Gas Detection, Alarm and Control)ESD (Emergency Shutdown)DL (Data Logging)


Point of Interest: DP Class

TOI designed the vessel’s control and power system basedon its many years of experience with the Discoverer SevenSeas and the Discoverer 534.

The system is designed to be safe, dependable, and a goodvalue for money without regard to precisely meeting Class 2or Class 3 criteria.


Point of Interest: FMEA

Independent FMEA (Failure Modes and Effect Analysis)will be performed to the extent necessary to assess thelikelihood of loss of station due to a single point failurewithin the vessel’s DP control, power or related systems.The criteria being adopted is not to quantify the probabilityof failure but rather to assess whether the vessel will or willnot lose station.

TRANSOCEAN OFFSHORE, INC.DISCOVERER ENTERPRISEPOWER PLANT LOADS

CONSUMER/MODE Easy Drill Heavy Drill Survival(5 Thrusters)

Transit Max Power(6 Thrusters)

Thruster

Hotel & MarineAuxiliary

Drilling

Mudpump

Drilling Auxiliary

Total KW Load

6000

3000

3000

4900

500

17400

20000

3000

3000

4900

500

31400

25000

2500

0

0

0

27500

25000

3000

0

0

0

28000

30000

3000

0

0

0

33000

TRANSOCEAN OFFSHORE, INC.DISCOVERER ENTERPRISE

WARTSILA DIESEL COMPLEMENT

ENGINE OUTPUT

WARTSILA VASA 32 100% = 416 KW / CYL = 558 HP / CYL

110% = 458 KW / CYL = 614 HP / CYL

4 each V-12 + 2 each V-12 D/G Skids = 96 CYL / 39,936 KW / 53,534 HP

1 each V-18 Skid Down = 78 CYL / 32,448 KW / 43,496 HP

110% Fuel Rack Setting = 35,693 KW / 47,846 HP


Thruster SystemThruster Machineryn 6 each thrusters at 6700 HP Continuous Dutyn Fixed Pitch Propellers for Simplicity, Durability and Reliabilityn Keel Hauled Type- Not Retractable- Can be hauled with or without

workboat assist

Thruster Drivesn Variable Speed A.C. Drives- LCI (Load Commutated Inverter) Type-

Simplen Technology/Simple Cooling compared to PWM

System Advantagesn Least Wear-and Tear on Machinery (No thruster- no rotation)n Big Savings in Fueln Very Good System Power Factor

presents the - Dynamic Positioning · 2015. 1. 8. · WARTSILA VASA 32 100% = 416 KW / CYL = 558 HP / CYL 110% = 458 KW / CYL = 614 HP / CYL 4 each V-12 + 2 each V-12 D/G Skids =

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