Strakes Installation Methodology Lecture

Outline R.J.Brown Lecture MMS-VIV Factors effecting VIV. Evolution of strakes for dampening VIV. Range of uses. Early observations of pipeline instabilities and solutions for determining forces on pipelines Offshore pipeline installation methods and procedures. Offshore riser installation methods and procedures. Typical pre installations of strakes on pipelines and risers. Typical post installation of strakes on pipeline spans in the VIV range Methods of trenching to avoid VIV.

Factors effecting VIV.

Marine Pipeline Stabilization SystemsSpoilers

In Bottom

Sand Bottom Jetted

Clay Bottom Jetted

Artifical Seaweed

Sand Bottom Plowed Snow Fence

Clay Bottom Plowed

On Bottom

i.e. Concrete

Extra Weight Anchors

Saddles, Mattresses, River Weights

Various Types of Backfill; Rock, Rip Rap, Slag, etc

Concrete Blocks

Above Bottom

StrakesSpans, SCR's, Top Tensioned Risers, Pipeline Bridges, Control of Span Length

FairingsRisers Only

Vortex Shedding As a flow stream passes an obstacle such as a cylinder or a pipe in its path, vortices are formed behind the obstacle. As the flow speed increases, vortices are alternately shed on each side. A flag that waves in the wind is a good example of vortex shedding. The flagpole is the obstacle. As the wind passes it is shed into vortices that make the flag wave.flagpole flag

wind vortices

Factors Effecting VIV Pipe diameter and wall thickness Pipe surface roughness Residual tension in pipe Span lengths Current velocities

Evolution of strakes for dampening VIV. Range of uses.

Non Oilfield use of Strakes Submarine Periscopes (WW2) Smoke Stacks (1960s) Bridges Antennas

Non Oilfield use of Strakes Submarine Periscopes (WW2) Smoke Stacks (1960s) Bridges Antennas

Oilfield application of Strakes Drilling Risers Pipelines SCR,s Jumpers Spars Flare Booms Production Top Tensioned Risers





Hoover-Diana Project


SPAR


SCR's


Pipeline Span Strake

MississippiMobile

Louisiana TexasHouston Beaumont New Orleans

Port Lavaca

x x x

North

Gulf

of

Mexico

120 feet of strakes

Early observations of pipeline instabilities and solutions for determining forces on pipelines

IRAQ KUWAIT IRAN Persian Gulf SAUDIA ARABIA

QATAR

GANAVEH

VACINITY KHARKUNorth

Strong Currents

KHARKRJBD

PLAN

KHARKU

GANAVEH

PROFILE

American Society of Civil Engineers Journal of the Pipeline DivisionProceedings Vol.93 No.PL1 Mar.1967 Hydrodynamic Forces on a Submarine PipelineBy Robert J. Brown M. ASCE

Shell Goepfert Patent

substantially eliminate or minimize substantially eliminate or minimize the underwater forces tending to displace the the underwater forces tending to displace the pipeline from its original laid position. pipeline from its original laid position.

Offshore pipeline installation methods and procedures.

S Lay

000 100 200 300 400 500 600 700 800 900 1000

Reeling

J Lay

Tow

Houston

Sabine PassNO RT H

LACameron

New Orleans Morgan City Buras Venice

TXFreeport Bay City Port Lavaca Port O'Conner Corpus Christi Matagorda Island Area9 6 0 20 40 60 Nau ti cal Mil es

Galveston2 9

Fourchon

G ulf of Mexico80 1 00

Enserch MC441KRJB

Makeup Site

28

Garden Banks Area

Flextrend GB117

Placid GC29

Mississippi Canyon Area

BP Troika GC200 Bald Plate GB260 Green Canyon Area92 9 1 90

East Breaks Area95 9 4

Enserch GB38893

Pan Arctic 250

0Mobi l Statfjord A 500

Esso Australia Kingfis h A 250 Esso Australia Kingfis h B 250 Esso Australia Cobia 250 Esso Australia Flounder 300

Esso Australia Bream B 200

Esso Australia West Tuna 200

1000

Flextrend 1,470 Ens erch MC 441 2,800 Ens erch GB 387 3,300

Penn State 1,650

2000 Esso AustraliaFortisc ue 250 Esso Australia Halibut 250

Plac id 2,350

3000

BP Troika 3,300

4000

Designed Installed

5000

6000 1975

1980

1985

1990

1995

2000

Bullwinkle GC-65 (Water depth 1350')18"x10" Catenary Risers

A1 7 miles B1 7 miles Mid-line tie-in Jumpers(Water depth 1850')

24"x10" Bundles A2 7 miles B2 7 miles

GC-200Troika Manifold(Water depth 2750')

TroikaKvaerner R J Browna division of Kvaerner Earl and Wright, Inc.

Manifold tie-in Jumpers

PENN STATE DEVELOPMENT INSULATED FLOWLINE SYSTEM3 1- Trailing sled 2- Midline sled 3- Riser

2

3 2

1

2SUB SEA WELL

1 1SUB SEA WELL

SUB SEA WELL

2,310,0

2,320,0

2,330,0

2,340,0

2,350,0

2,370,0

2,380,0

1,10 0'1,2 00 '

2,360,0

000 200 30000 50000 100 4 6 Scale in feet

800 1000 900

NORTH

Bullwinkle Platform

Step 18 Once the bundle target position isT = 167t, H= 105t Riser end height = 185' Cable out = 10' Pendants ( )

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

2,320,000

V3 0x

confirmed the riser deployment procedure is initiated as described on CP007 and the large scale procedure drawing.1,30 0'T = 167t, H= 105t

RISER INSTALLATIONSee CP103 Procedure Report

Scale in 1,000's of Feet

H.D.Distance to T.D. = 4849' Bundle off bottom = 2874'

TD 3

Riser end height = 214' Cable out = 10' Pendants ( )

64

65

DW

V2 8X2,327,189 10,111,4711,400'

71 2R 2T = 167t, H= 105t Riser end height = 185' Cable out = 10' Pendants ( )


0

66Debris (12)

67 111Step 14 The tow vessel passes through vessel positions

68 11210,120,000

69 113 KRJB10,120,000 2,390,000

2,390,0

70 11410,120,000

108 109Tow Vessel H force T Cable out Top of Riser Riser Survey Vessel


TD 2

,000riser End of

V2 9x

110T = 170t, H= 105t Riser end height = 323' Cable out = 10' Pendants ( )

8

Step 17 Once all positioning and control systemsH force T.D.

T = 169t, H= 105t Riser end height = 255' Cable out = 10' Pendants ( )

Bundle Bottom End of riser Ht. Horiz. dist. to T.D.

are confirmed operative the vessel increases power to start the bundle movement and advances from V29 to V30 with the ROV using Mesotech for stopping the bundle within the acceptable target nearTD30 on the sea bed.1,450 '

TD 2

Legend


1,5

V2 700'T = 170t, H= 105t Riser end height = 289' Cable out = 10'

H.D.Distance to T.D. = 5718'

V2 5 '00 1,5T = 170t, H= 105t Riser end height = 323' Cable out = 10' Pendants ( )

V24 toV29 with the survey vessel tracking the appropriate transponder on the bundle confirming proper positioning along the route. Should excessive variations in the bottom bundle position be observed the tow is stopped and new tow vessel surface positions are established prior to continuing the tow. Step 13 Once the riser end is confirmed in its proper

TD

9

2

Ele ctri ca l

Bundle off bottom = 3790'

Um bili ca

l

Step 16 The survey vessel then repositions itself' 00 1,5

Pendants (

)

TD 2

above the on bottom bundle stop target position, deploys the ROV, and confirms all systems are operative .


V2 6 '00 1,5

H.D.Distance to T.D. = 5718' Bundle off bottom = 3790' Hy dra ulic Um bili ca l

V2 4

towing position on the stern of the vessel the power is increased getting the bundle under way up to but not exceeding 3 knots. The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning.Tow Vessel H force T T = 170t, H= 105t Riser end height = 323' Cable out Top of Riser Riser Survey Vessel 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

X

Debris (11) 2,328,399

End of

10,115,379 Step 15 The tow is stopped at position V29 and the survey vessel confirms that the position of the bundle is within acceptable limits.

Cable out = 10'

Bundle Bottom End of riser Ht. Horiz. dist. to T.D. T.D. force H

2

A1 Tow-in Route

Pendants (

)


Legend

0000 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Scale in 1,000's of Feet

' Ex 1,700 isti ng Pip elin e

65 70 ' to

TD 2

1,6 00 '


1,6 00 '

4

V2 20'

2,350,000

A1

5

TD

V2 3


NOTE: These procedures are for guide purpose only and will require modifications in the field during the final tow-in

7

6

riser

10,108,845 Rockey Sub Sea Well

2,360,000

2,320,000

2,330,000

2,310,000

2

T = 104t, H= 90t Riser end height = 22' A1 Sled Cable out = 5000'

Step 11 A supply vessel with at least 9000 HP is attached to the 24" pontoon end and positions itself in a NE direction and the temporary buoyancy is removed and the buoyancy prepared for tow to the temporary TBD pontoon storage area. During this period an adequatly equiped safety vessel with at least 4000 hp capacity, is attached to the bow of the towing vessel for the tow into the Bullwinkle platform.e rory storag to tempe

B1 Sled

B1-Midline Tie-in x

PT A2B2 Sled A2 Sled

x x x A1-A2 Midline Jumper Tie-in Pendants ( ) H.D.Distance to T.D. = 7966' Bundle off bottom = 912'

V1 6 V1 82400' Pontoon

2,370,000

along the route.

V17 V18 V19 V20 V21 V22 V23 V24 V25

2,349,750 2,351,080 2,354,710 2,350,320 2,349,410 2,342,050 2,336,640

2,380,000

152 153

A2- B2 Vessel

le Bund

oute -in R To wPCA2

TD 2

3

n isti Ex

2,328,853

g bil Um l ica

10,110,000Step 10 The tow vessel continues tow at approximately 2 to 3 knots with 5000' of cable out and tracks along the green vessel tow route stopping at V17and thenbacks down to V18 , placing the entire bundle and riser on the seabed. The survey vessel monitors the appropriate transponder on the bundle confirming properT = 103t, H= 90t

10,110,000

Coordinates X (Ft) V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V12 V13 V14 V15 2,314,820 2,320,350 2,320,890 2,326,780 2,334,860 2,342,280 2,351,560 2,357,330 2,362,360 2,364,840 2,366,160 2,366,670 2,366,050 2,363,020 2,358,710 2,351,940

Coordinates Y (Ft) 10,088,750 10,081,400 10,080,610 10,072,780 10,061,980 10,059,960 10,061,080 10,064,200 10,068,810 10,073,610 10,077,020 10,081,180 10,086,590 10,094,090 10,099,060 10,102,640 10,103,360 10,102,370 10,100,940 10,102,940 10,103,190 10,108,060 10,111,610 10,116,020 10,117,160 10,118,330 TD1 TD2 TD3 TD4 TD5 TD6 TD7 TD8 TD9 TD10 TD11 TD12 TD13 TD14 TD15

Coordinates X (Ft) 2,310,250 2,315,050 2,315,540 2,321,040 2,328,810 2,333,790 2,341,540 2,347,480 2,353,380 2,357,360 2,359,850 2,362,050 2,363,970 2,364,290 2,362,460

Coordinates Y (Ft) 10,094,860 10,088,410 10,087,780 10,080,410 10,070,050 10,065,480 10,062,600 10,062,610 10,064,410 10,067,080 10,069,620 10,072,800 10,077,690 10,085,200 10,091,320 10,097,210 10,098,640 10,102,220 10,095,550 10,098,640 10,099,180 10,104,670 10,108,480 10,112,780 10,113,910 10,115,210 1,880,000 10,116,534 10,118,576 10,120,150 10,121,561 10,122,196 10,122,871 10,123,235

10,110,000


Xx


' 00 1,7

PT B2

PC

B2

Step 12 Upon approval to proceed the tow vessel comes up to 50% of towing power and spools in the tow wire raising the riser end of the riser to the stern of the vessel at V19 and applies sufficient power to start the bundle mov ing . The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning

1,600

'

Ele ctr ica Hy lU dra mb ulic Um ilical bili ca l25,23, 000 'R

1,70

0' 1,80

2,344,871 10,106,646 Debris (9)

X

positioning along the route.

000

'R

- B2

Riser end height = 16' Cable out = 5000' Pendants ( )

TD 2

V1 7

NORTH

154


156

157

V16

TD16 TD17 TD18 TD19

2,357,950 2,356,200 2,351,295 2,359,590

158

TD20 TD21 TD22

2,356,200 2,355,470 2,347,140


TD 1

V2 1T = 175t, H= 105t Riser end height = 554' Cable out = 10' Pendants ( )

1,879,000

PT B2

TD23 TD24 TD25 TD26

2,341,380 2,334,900 2,333,160 2,331,210 2,329,249 2,326,159 2,323,777

T = 14t, H= 0t Riser end height = 0'

2,330,000 2,328,230 2,326,440

PC

Cable out = 5000' A2 Pendants ( ) H.D.Distance to T.D. = 100' Bundle off bottom = 0'



2,340,000

8

Riser

way route on Tow-a Ponto

PCB223 ,0 00 'R

B1 H.D.Distance to T.D. = 7177' EOR Bundle off bottom = 5337'

V1 9T = 105t, H= 90t Riser end height = 52'' Cable out = 5000' Pendants ( )

V26 V27 V28 V29 V30 V31 2,324,453 2,321,839 2,319,481 2,317,514 2,317,575 2,317,652 2,317,719 2,317,828 2,317,926 a b c 2,318,067

10,119,531 10,121,435 10,123,000

TD27 TD28 TD29

000

TD 1 2 T TD D1 0 72

V2 0

PC

10,124,298 10,124,249 10,124,197 10,124,151 10,124,082 10,123,855 10,023,780

TD30 TD31 TD32 TD33 TD34 TD35 TD36 a

2,321,656 2,320,673 2,319,656 2,319,084

1,700'

1,800'

1,600'

PC PT B2

B1


PT A2 PT A120 0'

V1 5

10,100,000

10,100,000

V32 V33 V34 V35 V36 V36 V36

10,100,000

2,318,818 2,318,742 2,318,620

10,123,427 10,123,480 10,123,608 10,123,577 10,123,612

H.D.Distance to T.D. = 8411' Bundle off bottom = 1406' 2,318,215 2,318,290

10,023,823 10,023,921

TD36 TD36

b c

2,318,585 2,318,559

T 6 D1

KRJB' 00 1,8

See Report CP009 Mid-line Tie-in Report

Step 9 The tow vessel continues tow at approximately 3 knots with 5000' of cable out and tracks along the green vessel tow route slowing to a speed of 2 knots at TD16, unless steerage becomes a problem. The survey vessel tracks the

MID-LINE TIE-IN LOCATION1000 0 2000 3000 4000 5000 6000 7000 8000 9000 10000

1 TD 9

Line A2x

appropriate transponder on the bundle confirming proper positioning along the route.T = 106t, H= 90t Riser end height = 93' Cable out = 5000' Pendants ( )

0 TD 1

1,900'


' 00 1,9' 00 2,0

V1 4Step 8 The tow vessel continues tow at approximately 3 knots and spools-in 1000' of


2,00

0'

0'

1 TD 5PT A1

towing cable by TD14. The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning along the route. X Debris (4) 2,366,831 2,369,899 10,091,452Ele ctr

2,1 00 '

20

0002,1 00 '

T = 103t, H= 90t Riser end height = 4' Cable out = 5000'

1962,2 00 '

197x

Pendants (

)


V0 1

Step 1 The tow vessel crosses the initial approach fix TD01at the 1,900' contour with 5,000' of cable out and the vessel position as shown at V01. The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning along the route.

155 198 199

Xica lU X Debris (5) m bil ica l

10,090,455 Debris (6)

c uli dra Hy

10,090,000' 00 2,2

10,090,000

200 Line B2

2,368,458

10,089,897

201

ic bil Um

Coordinates for Rocky Pipeline X Y

Coordinates for Rocky Umbilical X Y

al

' 00 2,3

0 TD 0 2TD 3

x T = 108t, H= 90t Riser end height = 31' Cable out = 6000'

2325445, 10111258

2328853.6, 10108845.9 2328350.0, 10109577.0 2327724.0, 10110387.0 2327161.0, 10111154.0 2326911.0, 10111546.0 2326283.0, 10112120.0 2325563.0, 10112982.0 2324752.0, 10113980.0 2323847.0, 10115118.0 2323178.0, 10115989.0 2322538.0, 10116766.0 2321872.0, 10117648.0 2321266.0, 10118394.0 2320678.0, 10119140.0 2319805.0, 10120249.0

' 00 2,3Tow Vessel force H Cable out Top of Riserriser

Pendants (

)

V1 3x 320 0'

2324326, 10112084 2323097, 10112967 2321977, 10113788x 2


Survey Vessel

Tow-in Route

' 00 2,4 2,5 00 '

End of

Step 2 The tow vessel continues tow at approximately 3 knots and spools out under tow toT = 105t, H= 90t Riser end height = 71' Cable out = 5000' Pendants ( ) Bottom

Riser

TD1 4

2320754, 10114695 2319512, 10115645 2318604, 10116538 2317814, 10117662 2317306, 10118922 2317110, 10120410 2317273, 10121814x 4

Line A2PC B2

Bundle End of riser Ht. Horiz. dist. to T.D.

H force T.D.

V0 2T = 107t, H= 90t Riser end height = 20' Cable out = 6000' Pendants ( )

6000' of cable between TD02 and TD03 completing before V03.The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning along the route.

Legend2,4 ' 00

2317792, 10123160


2,600'

1 x PT B2

50 '


V0 3 10,080,0002,500'Tow Vessel H force T Cable out Top of Riser Riser Survey Vessel

2318943.0, 10121334.0 2318280.0, 10122149.0 2317700.0, 10122792.0 2317137.0, 10123207.0'

Bundle

002,700 '

0 TD 42,800 '

50

x




V1 2

10,080,000x x

10,080,000

2317114.0, 10123497.0 2317664.0, 10123493.0 2318131.0, 10123805.0 2328853.55, 10108845.9

Step 7 The tow vessel continues tow at approximately 3 knots and starts spooling-in of the tow wire at TD13. The survey vessel tracks the appropriate transponder on the bundle confirmingBundle force H T.D.

End of riser

A1- B1

2,900

'

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

8


2,700'

Step 6 The tow vessel continues tow at

240

2410' 3,00T = 107t, H= 90t Riser end height = 20' Cable out = 6000' Pendants ( )

242Step 3 The tow vessel continues tow at approximately 3 knots and maintains constant heading to TD05 The survey vessel tracks the . appropriate transponder on the bundle confirming proper positioning along the route. PCA1- B1

243

approximately 3 knots with 6000' of cable out and tracts along the green vessel tow route. The survey vessel tracts the appropriate transponder on the bundle confirming proper positioning along the route. 2,800'

2442 TD 1T = 111t, H= 90t Riser end height = 105' Cable out = 6000' Pendants ( )

2,370,000

x

2,380,000

A1 B1 Ve el ss Bu

Bottom

End of riser Ht. Horiz. dist. to T.D.

proper positioning along the route.2,600'

Legend

TD1 3


V1 1

x 5


202 246XDebris (3) 2,381,684 10,072,2170 1000 2000 3000 4000 5000 Scale in 1,000's of Feet 6000 7000 8000 9000 10000

Y

V0 4 242

le nd w To -in Ro ut eH.D.Distance to T.D. = 8776' Bundle off bottom = 1144'

245x 6 7

V1 0


2,379,585 10,072,095

X

Well (OCS-G-12209)

X

000

C F AU A OR T B ND T ION U S H : N U E A D B C L LE J A L D EC TEN VA ES T L IG TO AR UE Y S N IS CH S A CA FI AN RE LC N G P U A E R L LI A E A ZE S L T D T IM ED . H IN E A R

Debris (2)

10,070,0002,900 '

3,10

0'

0 TD 5Step 4 The tow vessel continues tow at approximately 3 knots with 6000' of cable out and3,20 0'

1

TD 1T = 111t, H= 90t Riser end height = 114' Cable out = 6000' Pendants ( )

10,070,000 V0 9

2,379,070 10,070,531

10,070,000

Step 5 The tow vessel continues tow at approximately 3 knots with 6000' of cable out and tracks along the green vessel tow route. The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning along the route. 3,000'


2,379,229 10,067,150

X

Shipwreck (1)

1 TD 0

tracks along the green vessel tow route. The survey vessel tracks the appropriate transponder on the bundle confirming proper positioning along the route.

2,340,000

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

TD 0

Cable out = 6000' Pendants ( )

Survey Vessel Tow Vessel force H Cable out Top of Riser Riserriser



V0 5 2423,200 '

3,10

0'Bottom

Bundle End of riser Ht. Horiz. dist. to T.D. H force T.D.

H.D.Distance to T.D. = 9957' Bundle off bottom = 2210' T = 111t, H= 90t Riser end height = 128' Cable out = 6000' T = 111t, H= 90t Riser end height = 128' Cable out = 6000' Pendants ( )

00

2,320,000

2,330,000

2,310,000

2,360,000

,350,000


V0 6 242

Pendants (

)

2,370,000


V0 7 242

10,060,000

Legend

10,060,000

2,390,000 10,060,000B A REV ENGINEERS SEAL RJB RJB BY 12/27/96 12/11/96 DATE RP RP APVD Revised per BPX Comments Initial Release DESCRIPTION

Riser end height = 114'

2,380,000

ndle A1- B1 BuTD0 8TD0 7

-in Tow

Rou

teT = 111t, H= 90t


' 00 3,1

0 TD 9

6

V0 8

End of

' 00 3,3

284

285

286

287

288

BPX / MARATHON / SHELL GC200 FIELD DEVELOPMENT: TROIKA PROJECT

JOB NO :

2130700

Kvaerner R.J.Browna division of Kvaerner Earl and Wright, Inc.

CLIENT NO

:

CLIENT SIGN :

,1 10

, 25

0 00

1

1 0,

, 24

00 0

10

, 12

0 3,

0

, 10

0 , 00 2 12

,1 10

21

00 ,0

H T O N R

10

0, 1 , 2

0 00

10

0 ,0 0 19 ,1

, 10

,0 8 110 0 1 0

00

2 2, 3

9 32 2,

2

2,

2, 3

2

3 ,

3 2,

2, 3

3 2,

10

, 12

B RJ K

T D3 2

T D3 6 T D3 5a TD 35 TD 34

T D3 3

60 '

V 36 c

Bullwinkle VESSEL STERN Platform TRACKV3 0 V3 1 V3 2 3 V3 4 V36 V3b

TD 31

TD 29

TO W TO W S

P E N D A N T S A 1 & B 1

D R A W

I N G

D W -

1 ,5 0 0'

1

T D30

24 0, 1x

30'

x

7 1

1 ,5 0

1 ,4

0 00 ,

T = 7 6 H=1 6 t , S=4 % 1 t, 0 0 Rise r e n h i g t = 1 7 2 d e h ' Ca b e o t = 1 0 ' l u Pe n a n (A, ,C) d ts B H.D.Dista n ce t T = 4 5 4 o .D. 6 ' Bu n l e o ff b o tt m = 2 6 9 ' d o 9

00 '

u te e A1 To w-i n Ro Ce n te r L i n

x

R EQ U I ED R PO SI T I N O V1V2 V3 V4 V5 V6

0'

V2 9

T =1 1 t H=1 0 t , S=4 % 7 , 1 0 Ris e e n h e h = 1 1 ' r d ig t 8 Ca b e o u = 1 0 ' l t Pe n d n t (A,B, ) a s C H.D.Dis t n ce to T. . = 4 2 3 a D 6 ' Bu n d e o ff b tto = 2 6 9 ' l o m 9

V2 7

Aiming Po n t i 2,3 23,30 4 10,1 20,27 0

x

1

S I ZE, PE N D N T S A A (C H IN ) AB C DE F G H

7 x

x

x

c x xb x x a

x

x

x

x

u te x e B 1 T w -i n Ro o C e n te r L in

V36 a

2 1 ,4 2 ,3 8 9 1 0 2 ,4 8 ,1 3 2

Ba tte r

Targ etLin eC o o rd i n a te s

B UN DLE S TOP PIN G TA RG ET PO SITIO N

L EN G TH O U T 5 00 05 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 6 00 0 5 00 0 5 00 0 5 00 0 5 00 0 5 00 0 5 00 0 4 00 0 2 00 0 2 00 0 2 00 0 10 10 10 10 10 10 10

PE N D N T S A A , B, C , D E ,A , B, C , D E , A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A B , C, D , , F , E A , B, C , D E , A , B, C , D E , A , B, C , D E , A , B, C , D E , A , B, C , D E , A , B, C , D E , A , B, C , D E , A,BC,D , A,BC,D , A,BC,D , AB ,C , AB ,C , AB ,C , AB ,C , AB ,C , AB ,C , AB ,C ,

LE N T H G 3 06 0 1 5 00 2 0 002 0 00 1 5 00 20 0 0 24 0 0

N I CH 33 3 33 3 3 3

A C CU M 3090 1 59 0 3 59 05 59 0 7 09 0 9 09 0 1 14 9 0

Ste p 14 T he t ow vessel pa sses thr ough vessel po si o ns V24 to V2 9 wit ti vessel tra cking the appr opr a te tr anspo nder on th e bun dle conf r ming pr i i positioning along the r oute . Should e xcessive var iations in the bo ttom b position b e obse rved the to w is stoppe d and new to w vessel sur face p o establishe d prio r to co ntinuin g the tow.

V3 5 a

C o o rd in a te s Y (Ft)1 0 ,1 1 5 ,9 1 0 1 0 ,1 1 6 ,8 3 3 1 0 ,1 1 8 ,0 8 3 1 0 ,1 1 9 ,2 5 6 1 0 ,1 2 0 ,6 9 2 1 0 ,1 2 2 ,7 1 2 1 0 ,1 2 4 ,1 2 61 0 ,1 2 4 ,0 5 8 1 0 ,1 2 4 ,0 0 6 1 0 ,1 2 3 ,8 4 6 1 0 ,1 2 3 ,9 0 9 1 0 ,1 2 3 ,8 5 9

C o o rd i n a te s C o o rd i n a te s X ( Ft)TD 2 4 TD 2 5 TD 2 6 TD 2 7 TD 2 8 TD 2 9 TD 3 0 TD 3 1 TD 3 2 TD 3 3 TD 3 4 TD 3 5 2 ,3 2 9 ,1 2 8 2 ,3 2 6 ,2 9 5 2 ,3 2 3 ,2 8 2 2 ,3 2 1 ,2 8 82 ,3 2 0 ,3 9 7 2 ,3 1 9 ,4 1 0 2 ,3 1 8 ,8 2 1 2 ,3 1 8 ,5 8 9 2 ,3 1 8 ,4 8 9

V7 V8 V9 V 10 V 11 V 12 V 13

0 0

1 0 0

2 0

3 0 0

4 0

5 0 0

6 0 0

7 0

8 0 0

9 0

1 0 0

Sa e i n e e c l f t

T = 0 1 H=2 t , S=7 5 1 t, 5 % Rise r e n h i g t = 0 ' d e h Ca b e o t = 1 0 ' l u Pe n a n (A, ,C) d ts B H.D.Dista n ce t T = 1 3 5 o .D. 0 ' Rise r o f b o m = 1 3 0 tto 8 '

V3 4

T =1 5 , H=4 7 , S=5 3 1 t t % R s e e n d h e g h t= 0 i r i ' C a leou = 1 ' b t 0 Pe n d n ts (A,B,C) a H . . s ta ce to T.D. = 1 5 1 ' DDi n 0 R s e o ff b o tt m = 2 1 4 ' i r o 6

V33

T = 3 t, H=1 6 , S= 4 % 9 t 8 Rise r e n h i g t = 0 ' d e h Ca b e o t = 1 0 ' l u Pe n a n (A, ,C) d ts B H.D.Di sta n ce t T = 8 5 ' o .D. 2 Rise r o f b o m = 1 1 0 tto 7 '

V3 5

Ste p 16 The survey ve ssel move s to th e final ta rget and r epositio ns itself ab ove th e on bo ttom bundle stop t arge t position . It th en de ploys the ROV, set s all har dware and confirm s that the sto pping systems a re o pera tive. T he tow- in per sonne l on the platfor m ar e con tacted to con firm th at the tow can be r estart ed to move t he bu ndle to its final sto pping p osition a t (Aiming Poin t 2 ,3 2 3,3 0 4 1 0 ,1 2 0 ,2 7 0 ). .

X (Ft)V2 4 V2 5 V2 6 V2 7 V2 8 V2 9 V3 0 V3 1 V3 2 2 ,3 2 9 ,7 6 4 2 ,3 2 8 ,2 7 6 2 ,3 2 6 ,4 7 4 2 ,3 2 4 ,6 4 7 2 ,3 2 2 ,4 2 3 2 ,3 1 9 ,3 5 9 2 ,3 1 7 ,4 0 62 ,3 1 7 ,4 3 6 2 ,3 1 7 ,5 1 9 2 ,3 1 7 ,5 9 9 2 ,3 1 7 ,7 2 9 2 ,3 1 7 ,8 0 4

Y (Ft)

A& R1 A& R2K E EL H A U L M E SS EN G ER S # 1 # # 2 3

1 50 0 3 50 0

2. 2 5 2. 2 5

1 0 00 1 0 00 1 0 00

2 2 2

1 0 ,1 1 6 ,3 3 3 1 0 ,1 1 8 ,1 9 9 1 0 ,1 2 0 ,1 9 9 1 0 ,1 2 1 ,5 2 51 0 ,1 2 2 ,0 9 0 1 0 ,1 2 2 ,6 6 7 1 0 ,1 2 3 ,1 0 3 1 0 ,1 2 3 ,3 3 3 1 0 ,1 2 3 ,4 0 01 0 ,1 2 3 ,4 1 4 1 0 ,1 2 3 ,4 6 6 1 0 ,1 2 3 ,4 7 8

V 14 V 15 V 16 V 17 V 18 V 19 V 20 V 21 V 22

Step 13 Afte r the riser buoya ncy is re moved and a ll the con ditions fo r tow contin uance are co nfirm ed th e tow vesse l comes up on power to ap proxim 80% of t owing po w r (1 34 to ns) a nd spo ols the r iser's top end to the surfa e final ch eck with the platfo rm is m ade and th e vessel g ets un der wa y at 2 t knots. Th e sur vey vessel tr acks the appr opr a te tr anspon der on the bun i confir ming p rope r po si o ning. tiCo o rd n a s fo r i te Ro ck y Pi p e n li e X Y 2 3 5 4 5 ,1 0 1 1 5 8 2 4 1 2 2 3 4 3 6 ,1 0 1 2 0 4 2 2 1 8 2 3 3 0 7 ,1 0 1 2 9 7 2 9 1 6 2 3 1 9 7 ,1 0 1 3 7 8 2 7 1 8 2 3 0 7 4 ,1 0 1 4 6 5 2 5 1 9 2 3 9 5 2 ,1 0 1 5 6 5 1 1 1 4 2 3 8 6 4 ,1 0 1 6 5 8 1 0 1 3 2 3 7 8 4 ,1 0 1 7 6 2 1 1 1 6 2 3 7 3 6 ,1 0 1 8 9 2 1 0 1 2 2 3 7 1 0 ,1 0 1 0 4 0 1 1 2 1 2 3 7 2 3 ,1 0 1 1 8 4 1 7 2 1 2 3 7 7 2 ,1 0 1 3 1 0 1 9 2 6 Co o in te s fo rd a r Ro ck y Um b l c a l i i X Y 2 3 2 8 5 .6 1 0 0 8 4 5 8 3 , 1 8 .9 2 3 2 3 5 .0 1 0 0 9 7 7 8 0 , 1 5 .0 2 3 2 7 2 .0 1 0 1 0 8 7 7 4 , 1 3 .0 2 3 2 1 6 .0 1 0 1 1 4 .0 7 1 , 1 1 5 2 3 2 9 1 .0 1 0 1 5 6 .0 6 1 , 1 1 4 2 3 2 2 8 .0 1 0 1 2 2 0 6 3 , 1 1 .0 2 3 2 5 6 .0 1 0 1 2 8 2 5 3 , 1 9 .0 2 3 2 7 5 .0 1 0 1 3 8 0 4 2 , 1 9 .0 2 3 2 8 4 .0 1 0 1 5 1 .0 3 7 , 1 1 8 2 3 2 1 7 .0 1 0 1 5 8 9 3 8 , 1 9 .0 2 3 2 5 3 .0 1 0 1 6 6 6 2 8 , 1 7 .0 2 3 2 8 7 .0 1 0 1 7 4 8 1 2 , 1 6 .0 2 3 2 2 6 .0 1 0 1 8 9 4 1 6 , 1 3 .0 2 3 2 6 7 .0 1 0 1 9 4 0 0 8 , 1 1 .0 2 3 1 8 0 .0 1 0 2 0 4 9 9 5 , 1 2 .0 2 3 1 9 4 .0 1 0 2 1 3 4 8 3 , 1 3 .0 2 3 1 2 8 .0 1 0 2 2 4 9 8 0 , 1 1 .0 2 3 1 7 0 .0 1 0 2 2 9 2 7 0 , 1 7 .0 2 3 1 1 3 .0 1 0 2 3 0 7 7 7 , 1 2 .0 2 3 1 1 4 .0 1 0 2 3 9 7 7 1 , 1 4 .0 2 3 1 6 6 .0 1 0 2 3 9 3 7 4 , 1 4 .0 2 3 1 1 3 .0 1 0 2 3 0 5 8 1 , 1 8 .0 2 3 2 8 5 .5 , 1 1 0 8 4 .9 8 3 5 0 8 5

T =1 8 t, H = 1 t , S=4 0 3 1 3 % Rise r e d h e g h t = 1 6 ' n i 7 Ca b e o u t = 1 0 l ' Pe d a ts (A,B,C) n n H.D.Di sta n e to T = 4 6 7 ' c .D. 3 Bu d e o f b o m = 2 9 9 n l tto 6 '

V30

T = 9 t, H=1 2 , S=8 8 % 8 t Rise r e n h i g t = 0 ' d e h Ca b e o t = 1 0 ' l u Pe n a n (A, ,C) d ts B H.D.Di sta n ce t T = 7 6 ' o .D. 1 Rise r o f b o m = 1 6 0 tto 6 '

0 0

1 0

2 0 0

3 0 0

4 0

5 0 0

6 0

7 0 0

8 0 0

9 0

1 0 0

Um bil

Sa e i n e e t c l f

V3 5a

ic al

V3 3 V3 4 V3 5

V 23 V 24 V 25 V 26 V 27 V 28 V 29 V 30

V290

V 3 5 a 2 ,3 1 7 ,8 6 9 V3 6 a 2 ,3 1 7 ,9 8 1

V3 6 b V3 6 c

2 ,3 1 8 ,0 8 1 2 ,3 1 8 ,2 1 5

1 0 ,1 2 3 ,8 2 2 T D3 5 a 2 ,3 1 8 ,4 7 0 1 0 ,1 2 3 ,8 7 4 TD 3 6 a 2 ,3 1 8 ,4 1 2 1 0 ,1 2 3 ,9 6 5 TD 3 6 b 2 ,3 1 8 ,4 2 1

1 0 ,1 2 4 ,0 5 1

TD 3 6 c

2 ,3 1 8 ,4 2 9

1 0 ,1 2 3 ,4 8 2

1, 55

0'

V28

T D2 8

TD 27

TD 36 TD3 5 TD34

TD3 2

TD33

TD 31

TD3 0

TD2 9

TD2 8

T ow Ves sel

S ur ve y Ve sse l

0

R JB

7 /1 /9 7

RP

Ap p ro v e d fo r c o s tru c ti o n n

N OT E: T hese p rocedures are for guide purpose only and will require modificatio ns in the field during the fin al tow-in

H f or e c

ARE Vof r i ser

R JBBY

5 /2 3 /9 7D AT E 213 07 00 :

R P In iti l R e e a s e a lAP V D D ES C R I T I N P O

T

C ab e o ut lT op of R se r i

n d

R se r i

B un dl e B ot t omE nd of r se r H t . i H or z . di st . t o T. D . i

H T. D .

o f r ce

BPX / MARA THON / SH ELL GC 200 F IELD DEVELO PMENT: TROI KA P ROJEC T FLOWLINE BU NDLE

ENGINEE S EAL RS

JO B N 0 . : C LI EN T N O

Kv ae rne r - R.J.B roa d v s o n o Kva e rn r Ea rl a n Wri h i i i f e d g

C LI EN T S I G N : P R J MGR OP R O JE N G LE A D E N G

E

:: :

Legend

RP J. . . . CR. . B R. . B G F. . M AC 12- M A Y- 96

B UNDLE B -1 RIS ER P LAC

D E SI G N ED B Y: C H EC K E D B Y : D R AF TS M A N :

SI Z E

TD2 7

2, 3

1 32 2,

3 2,

, 32

, 30

31

0 8,

00 , 26

, 22

20

24

10

00 ,0

T =1 0 t, H=8 5 , S= 0 % 5 t 4 R s e endhe h = 7 ' i r ig t 7 C a le o u = 1 ' b t 0 Pe n d n ts (A,B,C) a H . . s ta ce to T.D. = 3 5 4 ' DDi n 6 Bu n d e o b tto = 1 6 6 ' l ff o m 6

00 , 18 000 6,

0 5, 2

St ep 17 Onc e all posi tioning and c ont rol sy st em s are c onf irm ed operat ive the v ess el increases power to s tart t he bundle mov em ent and advances from V 29 to V 30 wit h the ROV us ing Mesotec h for stopping t he bundle within t he ac ceptable t arget at TD30 on t he sea bed.2, 0 8, 31 0 035 V

00 9, 0

0 00 7,

0 00

00

0 0 ,0

0 0 ,0

23 2, 3

0 00

0 0 ,0O N RT

00

0

2 0 0

3 0

4 0

5 0 0

6 0

7 0 0

8 0 0

9 0

1 0 0

0 00 ,

Sc a e n f e t l i e

H

Step 1 5 Th e vessel sto ps the bund e at po sition TD2 9 . T he sur vey vesse l l mo ves to th e yellow ta rget area and la unche s its ROV w the M esote ch and ith place s the a ppro priate hard ware o n the pipe a nd sea bed. Then a ser ies of star ts and stops a re exe cuted to judg e the accura cy of sto pping a t the final par king po sition for the final tow- n V3 0 po si o n. Once comp e te an d the i ti l han dling cha racte ristics are estab i sh ed go to Step 16. l T = 7 0 H=9 t 1 t, 5

B RJ K

, S=4 0 % Rise r e d h i g t = 1 9 1 n e h ' Ca b o t = 1 0 ' le u Pe n a n (A, ,C) d ts B H.D.Dista n e to T = 4 9 0 c .D. 5 ' Bu n l e o ff b o t o m = 2 6 9 ' d 9

T =1 6 t H=1 5 t , S=4 % 8 , 0 0 Ris e e n h e g h = 2 0 3 r d i t ' Ca b e o u = 1 0 ' l t Pe n d n t (A,B, ) a s C H.D.Di s t n ce to T = 4 5 9 a .D. 6 ' Bu n d o ff b o tt m = 2 7 0 ' le o 9

V26

T =1 6 t, H=1 0 5 , S=4 0 % 7 t Ri e re n d h e g h t = 3 2 ' s i 3 Ca le o u t = 1 0 b ' Pe d a ts (A,B,C) n n H.D.Di ta c e to T.D. = 5 7 1 ' s n 8 Bu d e o b o m = 3 9 0 n l ff tto 7 '

V25

T =1 7 t, H=1 0 t , S 6 5 Ri s e e n h e h = 3 r d ig t 6 Ca b e o u = 1 ' l t 0 Pe n d n t (A,B, ) a s C H.D.Di s t n ce to T. . a D Bu n d e o ff b tto = 4 l o m

x

elin e P ip035 kT =8 6 H=9 , S= 2 % t, t 9 Ri se r e d h e g h t = 0 ' n i Ca b e o u t = 1 0 l ' Pe d a ts-5 0 0 n n (A,B,C) H.D.Di sta n e to T = 6 0 8 c .D. ' Ri se r o b tto = 1 6 1 ' ff o m 0

0

5 k 0

V31

V36

V28Stop ping Se que n c e Th e to w v e s se l c o n ti u e s th e to w fro m0 V 2 9 a t 2 to 3 Kn o ts s to p p n g th e b u n d le a p r o im a te l y 2 0 0 ' fro m th e n i p x -5 0 ri se r s fi n a l p o si ti o n ta rg e t o n th e s e a b e d b e twe e n th e TD2 9 a n d TD 3 0 . Th e Su rv e y v e s s e l d e p l o y s th e R OV a n d p s itio n s i ts e l f n a r th e ta rg e t fo r th e s to p p n g s e q u e n c e . A fte th e R O V is co n fi rm e d i n p s i tio n th To w o e i r o e ve s s e l co n tin u e s t s to w a t a p p ro x i m a te y 1 k n o t, sto p p i n g a t se v e ra l p o s t io n s a s th e ta rg e t o n th e b u n d e i l i l a p p ro a ch e s th e s to p i n g p o s t i o n . Th e RO V w i th th e Me s o te c h so n a r m o n ito rs a n d co u n ts d o wn th e p i d s ta n c e to th e s to p p i n g p o sitio n a t th e " B undle s toppin g ta rge t p os ition 1 0 ,1 2 0 ,2 7 0 a n d 2 ,3 2 3 ,3 0 4 . Th e i -1 0 0 0 to w v e s se l ' s a p p ro x i m a te sto p p in g p o s t i o n i s a t V 3 0 -1 0 ,1 2 ,1 0 3 a n d 2 ,3 1 7 ,3 5 9 . In th is c a e th e b u n d l e i 4 s sto p i s c o n o l e d b y th e " B undle s toppin g ta rge t p os ition" . Th e stre s s l e ve l d u ri n g th e to -i n is 4 0 % o f tr w yi e l d .

V27

V26

-5 0 0

T =1 7 t H=6 8 , S=4 4 3 , t % Ri s e e n h e h = 7 ' r d ig t Ca b e o u = 1 0 ' l t 2, Pe n d n t (A,B, ) C 3 1 a s 7 0 ,0 a H.D.Di s0 t n ce to T. . = 2 7 0 D 2 ' Bu n d e o ff b tto = 4 4 ' l o m 5

V32x

-1 0 0 0 210 k1 9k 69 k 4 13 k 7

-1 0 0 0

20 k

-1 5 0 0

-1 5 0 0BU ND LE STO PP ING TAR GE T P OS ITIO N

-1 5 0 0

D WG N . o

D W-7 1

D R AW I G N o. N

R E FE R EN C E D R AW I G S N

D WG D AT E

:

S C AL E

F I LE N O .

S

CAUTION: This procedure is a very intense operation and interference or distraction of Riggers and or Positioning Master can be detremental to a successful installation. Based on site conditions wind, waves and currents) the Positioning Masters control and ability to reposition the primary vessel, add or remove other vessels is absolutely essental o minimize the risk during this procedure.

TOW VESSEL ALLOWABLE EXCURSION

Erect Riser10 ,1 2 00 ,0 4

V36c

x

TD13

Tow head lay down position

TD09

Scale (ft)

V34

TD11

Riser

TD16

TD17x

V15

TD07

V13

TD05

x

c

x xb

TD03

x x

x

xH RT NO

V35

Riser

Step Cable Load Stress V No. out (ft) (kips) (%yield)

TD15 TD-35a TD-36

V3 6

TD36c1 TD35a1

3500

3000

V3HD to touchdown Riser off bottomJB KR

5a

a V36 V35a 1Um bil ica l

Head off HD to Riser off bottom touchdown bottom (ft) (ft) (ft) 4 20 50 95 152 220 297 381 472 564 657 752 850 952 1057 1165 1274 1365 1365 1365 1365 3288 2789 2377 2060 1819 1636 1494 1383 1294 1225 1174 1136 1103 1074 1047 1021 996 973 1035 825 610 140 240 340 440 540 640 740 840 940 1035 1135 1235 1335 1435 1535 1635 1735 1835 1830 1710 1610

2500

2000

Head off bottom1500

1000

Cable out Load Note: It is of prime importance that the vessel's stern follows the track shown on the procedure above The heading of the vessel during the yawing process is a function of the vessel yawing power, control, wind, sea state and currents. The vessel captian is the sole judge of the vessel heading during the backin maneuver.

500

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 34 35 36

3470 2908 2245 2082 1796 1564 1369 1200 1048 915 791 675 560 446 332 218 104 11 10 10 10

105 104 104 106 108 112 116 122 128 134 140 147 153 160 167 174 180 189 189 172 160

20 33 41 46 48 49 50 51 53 55 56 56 55 56 58 60 63 64 64 84 105

Distance in Feet

0 1 3 5 7 9 11 13 15 19 17 21

Vessel Position

2 RJB 1 RJB 0 RJBREV BY

8/28/97 8/7/97 7/2/97DATE 2130700 :

RP Revised scaling and TD coordinates / J.C. RP Revised vessel and TD coordinates / J.C. RP Approved for constructionAPVD DESCRIPTION

TD-35

TD-34

a

TD01

b

TD18x

x x x

Riser

V36c1

2, 31 0 8, 00

VesselV 13 V30 2,317,612 10,124,239 V 15 2,317,68 2 10,124, 193 V31 2,317,684 10,124,213 V3 4 2,317, 936 10,124, 025 V32 2,317,747 10,124,147 V3 5 2,31 8,011 10,12 3,975 V33 2,317,818 10,124,101 V35a 2,318,10 7 10,123,91 2 V34 2,317,936 10,124,025 V35a1 2,318, 357 10,123, 746 V35 2,318,011 10,123,975 V36a 2,318, 143 10,12 3,962 V35a 2,318,107 10,123,913 V36b 2,318, 187 10,124,0 13 V35a1 2,318,357 10,123,746 V36c 2,318, 240 10,12 4,059 V36a 2,318,143 10,123,962 V36c1 2,318, 511 10,123, 879 V36b 2,318,187 10,124,013 V36c 2,318,240 10,124,059 Vb 2,318,203 10,123,678 V36c1 2,318,511 10,123,879 Vc 2,318,267 10,123,747 Vd 2,318,385 10,123,830

Touch DownTouch X X

XDown Y X Y Y 2,317, 476Y 10,124, 331

Vessel

VESSEL VESSEL STERN STERN TRACK TRACK600

2,3 18,387 10,12 3,725 2,321,508 10,121,659 2,318,552 10,123,617 2,318,798 10,123,456 2,318,697 10,123,519 2,318,620 10,123,426 2,318,799 10,123,453 2,318,699 10,123,519 2,318,619 10,123,425 2,318,624 10,123,422 2,318,507 10,123,646 2,318,62 5 10,123, 419 2,318,620 10,123,581 2,318,513 10,123,654

BullwinkleExcursion Limits

0

400

100

200

300

500

BPX / MARATHON / SHELL GC200 FIELD DEVELOPMENT: TROIKA PROJECT FLOW LINE BUNDLE

Pipelin

eENGINEERS SEAL

C

JOB NO.: CLIENT NO

Kvaerner - R.J.Browna division of Kvaerner Earl and Wright, Inc.

CLIENT SIGN : PROJ MGR PROJ ENG LEAD ENG : : : R.P. J.C. R.B. R.B.

BUNDLE A-1 RISER PLACEMEN

DESIGNED BY:

Recent Project - BPTroika, Gulf of Mexico

EEX 12 OIL

EEX 12 OIL

EEX 12 GAS

AMERADA HESS 12

Shell 12 Gas West Shell 12 Gas East

Shell 16 Gas

Shell 16 Oil

Amerada Hess 12

EP 12 Gas

EP 12 Oil

EEX 12 GAS EEX 12 GAS

EEX 12 OIL EEX 12 GAS

EEX 12 OIL

Documents

Strakes Installation Methodology Lecture