A tale in three spreads
Construction on the pipeline began in July 2006, and was split into three spreads through the Amazon Rainforest.
Section A – Urucu to Coari
The first spread involved converting the 18 inch diameter, 279 km Urucu to Coari section from LPG to natural gas service. A 10 inch diameter pipeline was then constructed to transport LPG, which came online in February 2009.
Section B1 – Coari to Anamã
The 20 inch diameter, 196 km second spread provided many challenges, beginning with access and transportation. Helicopters capable of supporting up to 4.5 t were used to transport pipe where there was no land or river access. Lengths of pipe were tied to 80 m long wire ropes and lowered by helicopter onto the pipeline spread. This method was used along 75 km of the pipeline route.
Petrobras used several techniques traditionally used for laying pipes in the sea or underwater, burying the onshore pipeline using ‘platform barge pushing’ and horizontal directional drilling (HDD) to install the pipeline. The solution allowed for work to continue even during the rainy season, between November and June, in hard-to-access areas.
Section B2 – Anamã to Manaus
The final 186 km Anamã to Manaus section of the pipeline route traverses through 135 communities and associated urban infrastructure, including 46 km of roads within close proximity to the gas pipeline.