Andritz’s submersible motor technology success

In one of the world’s largest oil and fuel fields, the firstever underwater compressor system employs ANDRITZ submersible motors. With their renewable winding these maintenance-free designed pumps have achieved impressive results.
We are surrounded by gasoline. From water bottles to the insulation in our houses, natural fuel is a key ingredient in just about every product we use daily. According to the latest report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gas has been rising by 35% of the past decade alone.
The causes for this trend are manifold, however the IGU determines three main elements. First, the price competitiveness of fuel in contrast to other power sources. Secondly, larger security of supply with regard to infrastructure, supply, and flexible use. Thirdly, fuel represents a sustainable form of power that can mitigate local weather change and lower localized air pollution. It has 50% fewer CO2 emissions in comparability with coal, for instance.
In order to satisfy this rising demand and use, the eco-friendly potential fuel will have to be extracted utilizing a sustainable process. One of the largest techniques is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells combined in 16 fuel fields and connected by 300 km of oil pipelines. As of December 2018, the sector has estimated assets of 9.9 million standard cubic meters of oil equal of oil and 51.1 million commonplace cubic meters of oil equivalent of gas.
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 completely since extraction started in 1999. Åsgard B is a floating, semi-submersible fuel and condensate processing platform for processing and stabilizing of fuel 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 earth Aker Solutions ASA has been supporting the Åsgard gas field with varied gas field merchandise, methods, and services since 2010. In time, the strain 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 improve the output to 306 million barrels. These are usually installed on platforms above sea stage.
However, Åsgard is based on an underwater system. By using compressors on the seabed the restoration charges are improved and the funding and working prices 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 units of compressors, pumps, scrubbers, and coolers. The motors needed to drive the pumps come from ANDRITZ.
Small, however essential
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, became ANDRITZ Ritz GmbH and a part of the ANDRITZ Group, as did the production of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are suitable for driving deep well pumps, backside intake pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of application, the motors can be made of forged iron, bronze or totally different kind of stainless steel and installed both 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 particular cooling expertise. In designs with interior permanent magnet motor technology, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, in consequence, value savings.
The efficient and measurable motor cooling system keeps the inside 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 at the lower shaft finish of the rotor. One of its two main tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a fixed flow of cooling liquid in the best direction.
This liquid strikes via the inside of the motor from the bottom to the highest. The specially developed cooling channels define the precise path over all heat sources to discharge the warmth successfully and systematically. At the top end, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it’s transferred by way of the surface of the motor to the medium to be pumped.
The ANDRITZ submersible motors are just a tiny a part of the underwater compressor system, however they are also an extremely essential part. The entire underwater station cannot function without these motors to drive the pumps. Since first being put in in เกจวัดแรงดัน250bar , these submersible motors have been operating with none faults. All in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor types the condensate unit along with the pump and conveys those liquids which would possibly be eliminated by the separator upstream of the gas compressors.
In 2017, as a end result of a failure in a half of the system which was not provided by ANDRITZ, the motor was despatched in for repairs, throughout which an intensive study was conducted. Thermal distribution within the cooling move and the recent spots were analyzed in more detail. The outcomes additionally led to the design of a brand new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was also completely overhauled and fitted with a new winding and a model new rotor. This examine and the implementation of its findings not only profit the current buyer and future customers on this case, but also strengthen confidence in the ANDRITZ submersible motor technology.

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