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offshore

Exploration for new oil and gas fields is increasingly moving offshore. The wide range of applications, with welds often subjected to extreme environments, put a high demand on weld quality. Magnatech equipment has been used extensively for offshore pipeline welding projects using the GTAW and FCAW processes.

Many gas and oil fields contain high levels of dangerous and corrosive hydrogen sulfide and carbon dioxide. Special CRA (Corrosion Resistant Alloy) clad pipes are used to withstand corrosion, and require special welding techniques. Multi-billion dollar pipelines have been destroyed in months if the welding is not properly performed. Magnatech pipeline welding systems offer a proven solution.


Magnatech provides solutions for the welding of small diameter, heavy wall Duplex stainless steel pipes used for control of sea floor well components.


The gigantic platforms that are used for both drilling and production are constructed of large diameter tubular assemblies. Fabricators use Magnatech's Pipeliner system, with its high deposition rate FCAW process for welding of the legs, known as "jackets". The "topsides" platform equipment and process piping are welded by fabricators worldwide using Magnatech orbital welding systems.


  • Specialized pipeline welding systems for offshore welding
  • Proven solutions and technical expertise in welding CRA clad piping
  • Magnatech provides operator training and assistance developing weld procedures worldwide.

With growing energy demand globally, the technology to extract offshore oil and gas in ever deeper waters demands the weld integrity that automated orbital welding can uniquely provide.

Applications

Fabrication of Drilling & Production Platform


Equipment Used

PIPELINER II WELD HEAD

MPS-4000 POWER SUPPLY

 

Challenge

J. Ray McDermott operates numerous fabrication facilities worldwide as an EPC contractor for offshore drilling and production platforms. One deep water fabrication facility located in Altamira, Mexico has provided several drilling platforms for PEMEX Exploracion y Produccion, including fabrication of both jacket (structure) and topsides (deck and all processing/drilling equipment). Welds in large-diameter tubulars (53" and 65" OD) had to be made to high quality standards. McDermott investigated the Pipeliner FCAW process to replace stick electrode welding.

Solution

McDermott purchased 3 Pipeliner Systems from Magnatech for making these large-diameter butt welds for the jacket of the Kuil-A Drilling Platform destined for the Bay of Campeche.