THE BEATEN PATH ISN’T ALWAYS THE FASTEST.

CHEVRON DRILLING MODULETEXAS, USA

29 APRIL2014

APRIL2014

REBUILDING THE DM INTOONE PIECE

ON ITS WAY TO INGLESIDE

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WINNING 60 DAYS WITH PARALLEL CONSTRUCTION AND WELL-PREPARED TRANSPORT.

21 APRIL2014

PREPARING BARGE RAMP FOR LOAD-OUT

21 APRIL2014

CUSTOM MADE RAMP FOR LOAD-OUT

A Z

When Nabors was building a

drilling module (DM) for its client

Chevron, Mammoet was asked to

transport over 120 components

from one construction yard

to another for further assembly.

Mammoet took on the challenge

but proposed a much faster

approach. Instead of shipping the

DM as individual elements,

Mammoet suggested assembling,

transporting and lifting

the 2,268-ton module onto the

platform in one piece. This allowed

construction on another part of

the platform to continue while the

DM was built. Mammoet’s plan

saved 30 days of rebuilding and

another 30 days of hook-up time.

Nabors chose its original approach of

transporting the DM in individual

pieces, because it was under the

impression it simply could not

be shipped in one go. First, the road

from the fabrication yard to the

load-out area was too narrow to carry

the module. Secondly, there was a

height difference between the barge

and the load-out quay, which was

supposedly too steep to load-out the

tall DM. Finally, the customer

assumed the shallow waters of the

shipping route would not be able to

handle a barge with the weight of the

full DM either. But transport aside,

the DM wasn’t designed to be lifted

in one piece to begin with.

After close examination, Mammoet

came with an approach that took

away all bottlenecks. We began by

building a special support frame to

allow the DM to be lifted onto the

offshore platform. In order to

overcome the issue of the narrow

road, Mammoet proposed to move

the separate DM components to an

alternative yard near the load-out

area and assemble it there. From

there, it was possible to transport the

DM in its entirety to its final

destination. A custom ramp offset the

height difference between the barge

and the quay at the load-out location.

Mammoet successfully loaded the DM

onto a barge with enough draught to

make it through the shallow waters.

To make sure the shipping route

could in fact handle the barge with

the weight of the complete DM,

a sonar survey was conducted and a

dive team was employed to

double-check the water depth.

Mammoet’s alternative solution

proved highly advantageous for

Nabors and Chevron. By allowing

construction on the ETLP to continue

while the DM was built in another

construction yard, Mammoet helped

Nabors deliver the DM 60 days

ahead of schedule.

RESOURCES

CRANES 2 crawler cranes

TRANSPORT108 axle lines of SPMTprime movers and trailers

MARITIME EQUIPMENT1 barge3 tugs

SPECIAL EQUIPMENT custom made support frame

CREW 40 Mammoet professionals