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

Azerbaijan

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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