Andritz’s submersible motor know-how success

In one of the world’s largest oil and gasoline fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved impressive outcomes.
We are surrounded by fuel. From water bottles to the insulation in our houses, natural gas is a key ingredient in virtually each product we use daily. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gas has been rising by 35% of the previous decade alone.
The reasons for this pattern are manifold, however the IGU determines three major components. First, the cost competitiveness of gas in contrast to different power sources. Secondly, higher security of supply with regard to infrastructure, supply, and versatile use. Thirdly, ราคาpressuregauge represents a sustainable form of power that can mitigate climate change and decrease localized pollution. It has 50% fewer CO2 emissions in comparability with coal, for instance.
In order to fulfill this rising demand and use, the eco-friendly potential gas must be extracted using a sustainable process. One of the most important systems is the Åsgard oil and gasoline subject on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells mixed in 16 gas fields and linked by 300 km of oil pipelines. As of December 2018, the field has estimated assets of 9.9 million normal cubic meters of oil equal of oil and fifty one.1 million commonplace cubic meters of oil equal of gasoline.
The system used comprises three essential areas: Åsgard A, B, and C. Åsgard A is a floating oil production vessel that has been anchored there permanently since extraction started in 1999. Åsgard B is a floating, semi-submersible fuel and condensate processing platform for processing and stabilizing of gas and condensate. This platform is supplemented by the condensate storage facility Åsgard C and the 707 km-long Åsgard fuel pipeline to the Karsto processing advanced to the north of Stavanger, Norway.
First on the planet Aker Solutions ASA has been supporting the Åsgard fuel subject with varied gasoline field products, systems, and companies since 2010. In time, the stress in the storage facility in gas-producing fields drops. Compressors are wanted to sustain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard to have the ability to enhance the output to 306 million barrels. These are normally put in on platforms above sea stage.
However, Åsgard is predicated on an underwater system. By using compressors on the seabed the recovery rates are improved and the funding and operating costs are lowered. In addition, underwater compression leaves a smaller ecological footprint and is more dependable than a platform. The Åsgard system consists of modules for two identical sets of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, but important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, grew to become ANDRITZ Ritz GmbH and part of the ANDRITZ Group, as did the manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep well pumps, backside intake pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the realm of application, the motors may be made from cast iron, bronze or totally different type of stainless-steel and put in either vertically or horizontally. These are water-filled and watercooled, three-phase asynchronous motors with squirrel cages and a mech- anical seal. They are fitted with MCT, a special cooling technology. In designs with inside permanent magnet motor expertise, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, value financial savings.
The effective and measurable motor cooling system retains the interior temp- erature as little as possible. Drinking water is used as a cooling liquid, which is why the motors can operate in media of up to 75° C. An impeller with optimized suction and supply is mounted on the decrease shaft end of the rotor. One of its two primary duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there’s a constant circulate of cooling liquid in the best path.
This liquid strikes via the within of the motor from the bottom to the highest. The specially developed cooling channels define the exact path over all heat sources to discharge the heat successfully and systematically. At the top finish, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it is transferred via the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny part of the underwater compressor system, but they are additionally an extremely necessary half. The entire underwater station cannot operate without these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been working without any faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor forms the condensate unit together with the pump and conveys these liquids that are removed by the separator upstream of the gas compressors.
In 2017, because of a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, during which an intensive research was performed. Thermal distribution within the cooling flow and the recent spots had been analyzed in additional detail. The results additionally led to the design of a new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was also fully overhauled and fitted with a model new winding and a new rotor. This study and the implementation of its findings not only profit the current customer and future customers in this case, but in addition strengthen confidence in the ANDRITZ submersible motor expertise.

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