11 tether piles

11 TETHER PILES

In 2016, the CAPE VLT-80 was used to upend and install eleven tether piles, with a length of 28.5 meter, weighting 33.5 tonnes, a diameter of 48 inches and in a water depth of 70 meter in the Caspian Sea for a tether system to be placed on top which is used to secure the blow out preventor in case of seismic activity.

Piles were installed within tolerances and with 8 out of 11 piles to final penetration and all achieved penetration depths were in line with predictions or better.

The total installation time with the CAPE VLT took less than three days, nearly 10 days less than allowed for.

Application details

Application
Tether pile installation
Pile type
Tether piles
Water depth
70m
Penetration
25m

PILE DETAILS

Pile type
Tether piles
Pile length
28.5m
Pile weight
33.5t
Pile wall thickness
40mm
Pile diameter
48inch
No. of piles
11

PROJECT DETAILS

Period
2016
Sea
Caspian Sea
Country
Azerbeidzjan
Market
Oil & gas
System/end usage
Blow Out Preventor protection
Operator or end customer
BP
Installation contractor
Saipem

Main Reasons for solution choice

NO NEED FOR GRIPPER OR INSTALLATION FRAME

UPENDING, LIFTING, DRIVING IN SINGLE OPERATION

SUBSEA COMPATIBLE

SELECTED EQUIPMENT

CAPE VLT-80

Equipment configuration
CAPE VLT-80 Single
Eccentric moment
80kgm
Max. line pull
131t
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