7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 1/29

CONVENTIONAL BARGE ANCHORING

TECHNIQUES AND AVOIDANCE METHODS

Don Eckert

Lead Equipment EngineerGlobal Industries Offshore, LLC

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 2/29

ABSTRACT

This report reviews the anchoring system components for

conventional pipelay barges. It also details how barges use

their anchoring systems to avoid biologically sensitive

seafloor areas while laying flowlines.

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 3/29

TOPICS

Anchoring System Components

• Typical conventional barges & their sizes

• Towing tugs

• Winches

• Tug

• Barge

• Anchor wires

• Fairleaders

• Anchor types

• Flipper

• Stockless

• Anchor holding capacity – sand

• Anchor holding capacity – clay

• Pendant wires

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 4/29

TOPICS (continued)

• Pendant buoys

• Horizontal can

• Vertical can

• Complete pendant buoy, wire, anchor

• Midline buoys

• Under-running sheave

• Animated standard barge anchoring procedure

• Animated avoidance of biologically sensitive areas

• Contingencies

• Anchor wire parting

• Pendant wire parting

• Recommendations and conclusion

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 5/29

TYPICAL CONVENTIONAL BARGES & THEIR SIZES

GP-37

Shallow water lay barge (0–225 fsw)

Dimensions – 188’ x 60’ x 14’

Eight-point anchor system

SEA CONTRUCTOR

Intermediate water depth lay barge (226–600 fsw)Dimensions – 250’ x 72’ x 16’

Seven-point anchor system

CHEROKEE

Intermediate to deep water depth lay barge (226–1000 fsw)

DIMENSIONS – 387’ x 100’ x 25’

Eight-point anchor system

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 6/29

GP-37

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 7/29

SEA CONSTRUCTOR

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 8/29

CHEROKEE

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 9/29

TOWING TUGS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 10/29

TUG WINCH

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 11/29

BARGE WINCH

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 12/29

ANCHOR WIRE

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 13/29

BARGE FAIRLEADER

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 14/29

ANCHOR TYPES

• FLIPPER

• STOCKLESS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 15/29

FLIPPER ANCHORS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 16/29

STOCKLESS ANCHORS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 17/29

ANCHOR HOLDING CAPACITY – SAND

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 18/29

ANCHOR HOLDING CAPACITY – CLAY

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 19/29

PENDANT WIRES

PENDANT BUOYS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 20/29

PENDANT BUOYS

TYPE: HORIZONTAL CAN

PENDANT BUOYS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 21/29

PENDANT BUOYS

TYPE: VERTICAL CAN

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 22/29

COMPLETE PENDANT BUOY, WIRE, ANCHOR

MIDLINE BUOYS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 23/29

MIDLINE BUOYS

UNDER RUNNING SHEAVE

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 24/29

UNDER-RUNNING SHEAVE

ANIMATED STANDARD BARGE ANCHORING

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 25/29

ANIMATED STANDARD BARGE ANCHORING

PROCEDURE

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 26/29

ANIMATED AVOIDANCE OF BIOLOGICALLY

SENSITIVE AREAS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 27/29

ANIMATED AVOIDANCE OF BIOLOGICALLY

SENSITIVE AREAS WITH 2 TUGS

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 28/29

CONTINGENCIES

••

ANCHOR WIRE PARTINGANCHOR WIRE PARTING

•• PENDANT WIRE PARTINGPENDANT WIRE PARTING

RECOMMENDATIONS AND

7/26/2019 1D 01 Eckert Slide Show

http://slidepdf.com/reader/full/1d-01-eckert-slide-show 29/29

RECOMMENDATIONS AND

CONCLUSION

•

PROPER PIPELINE ROUTE PLANNING

• ADHERENCE TO NTL 2004-G05

• CONSULT PIPELINE INSTALLATION

CONTRACTORS