Cofferdam over a well head installation

COFFERDAM OVER A WELL HEAD INSTALLATION

In 2015, the CAPE VLT-320 was used to install a 5.7 meter diameter cofferdam over a leaking plugged and abandoned oil well in order to repair the leak.

The pile was divided into two bolted sections of 11.3 and 6.7 meter and installed at Weeks Island in Louisiana, USA. The first section was placed onto the mudline, after which the CAPE VLT was placed on top and used to vibrate the first section to target penetration.

After the CAPE VLT was removed, the second section was placed and bolted to the first section. Finally, the CAPE VLT was placed on top again to vibrate the complete cofferdam to final penetration.

Application details

Application
Leaking well containment
Pile type
Caisson
Water depth
1.2m
Penetration
15m

PILE DETAILS

Pile type
Caisson
Pile length
Section 1: 11.3m / Section 2: 6.7m
Pile weight
52t and 34t
Pile wall thickness
45mm
Pile diameter
5.7m
No. of piles
1 (2 sections)

PROJECT DETAILS

Period
November 2015
Country
USA
Location
Weeks Island, Louisiana
Market
Oil & gas
System/end usage
Cofferdam
Operator or end customer
Shell
Installation contractor
Tetra Technologies

Main Reasons for solution choice

NO DIAMETER LIMITATION

NO NEED FOR GRIPPER OR INSTALLATION FRAME

VERTICALITY MONITORING DURING DRIVING

SELECTED EQUIPMENT

CAPE VLT-320

Equipment configuration
CAPE VLT-320 Single
Eccentric moment
320kgm
Max. line pull
500t
hero_desktop_2880x1620_P0217 – Cofferdam over a well head installation hero_mobile_1200x2400_P0217 – Cofferdam over a well head installation

offshore
vibro
technology

Discover how its unique features will uplift your next project; download the offshore vibro technology guide.

YOU MIGHT BE
INTERESTED IN