The installation of the last stretch of the Rota 3 gas pipeline, which will connect the pre-salt to Comperj’s Natural Gas Processing Unit , is about to begin. According to the schedule established in the contract between Petrobras and McDermott, the execution of the pilot hole of arrival at Praia de Jaconé, in Maricá (RJ), is scheduled for March 19.
A jack-up, which will support directional drilling activities, is due to be operational a week later. Then, between April and the beginning of May, a Pipe Carrier, a RSV (ROV Support Vessel) and a pipeline launch vessel will begin to operate in the project to support the operation.
In the amount of R $ 265.5 million, the contract for the ultra-shallow stretch of Route 3 entered into force on November 19 and is due to expire on May 7, 2020 (total duration of 535 days). Based on an integrated contracting of the EPCI type (Engineering, Supplies, Construction and Installation), the agreement foresees the interconnection of the new line to the existing shallow stretch.
Petrobras demanded that McDermott mobilize an onshore directional drilling base and support the pre-commissioning of the pipeline, within a 5,000-square-meter limit made available by the petroleum company. Another requirement was the installation of a base of operations to move, ship and transport the project’s pipes, which are stored within the Comperj area.
In addition to providing 13.7 km of pipelines, Petrobras will provide the detailed tie-in project for the interconnection between ultra-shallow and shallow sections, a DSV (Dive Support Vessel), a pig launcher for submarine interconnection spools and an OSRV of support for emergency operations.
Delivery of the conditioned pipeline between the ultra-shallow and the beach – including cleaning, calibration, hydrostatic testing, drying and inerting – and the interconnection spools at the installation bottom should be done by the beginning of February 2020. The demobilization and release of the beach area is scheduled for March 3 of the same year.
The service life to be considered in the submarine system design is 30 years.
One of the sensitive points of the installation of the ultra-shallow stretch of Route 3 is related to the arrival point of the pipeline to the Beach of Jaconé, which houses a cultural and archaeological patrimony referring to the beachrocks of Jaconé and areas identified as biodentritic gravel and rock outcrops.
In the contract, Petrobras notes that anchor handling, anchoring and / or positioning of duct launchers, directional bore support and installation should be preceded by approval of specific procedures to ensure that they will not suppress, destroy, mutilate or de-characterize, totally or partially, directly or indirectly such patrimony.
Route 3 in detail
With capacity to transport 18 million m³ / day of natural gas and 355 km of total extension – being 307 km referring to the maritime stretch and 48 km, to the terrestrial stretch -, Route 3 will leave the northeast corner of the field of Búzios , in a water depth of 1,628 thousand m.
The stretch will be made up of a 184-km-long 24 “diameter pipeline, equipped with two ILTs (In-line Tee) and two Pipeline End Manifold (PLEM) with” waits “(connection hubs) for future connections , three Pipeline End Termination (PLETs), three rigid connection jumpers and an interconnection system to the Rota 2 (Cabiúnas) pipeline.
The terrestrial stretch – whose installation is under the responsibility of Encalso Construções – will be composed of a pipeline of 22 “in diameter, 48 km long, equipped with shut-off valves along the extension of the duct, a receiver / launcher set in the area near the beach of Jaconé, in Maricá (RJ), and a receiver in the facilities of the Comperj. No future connections are planned along the land stretch.
Source: Brazil Energy Magazine