Andritz’s submersible motor technology success

In one of the world’s largest oil and gas 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 homes, pure gasoline is a key ingredient in nearly each product we use every day. According to the latest report issued by the International Gas Union (IGU) in 2019, the worldwide demand in fuel has been rising by 35% of the previous decade alone.
The reasons for this pattern are manifold, however the IGU determines three primary elements. First, the price competitiveness of gas in contrast to different power sources. Secondly, higher security of provide with regard to infrastructure, supply, and versatile use. Thirdly, gasoline represents a sustainable form of vitality that can mitigate local weather change and lower localized pollution. It has 50% fewer CO2 emissions in comparability with coal, for instance.
In order to meet this growing demand and use, the eco-friendly potential gasoline should be extracted using a sustainable course of. One of the largest techniques is the Åsgard oil and fuel area on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in sixteen gas fields and connected by 300 km of oil pipelines. As of December 2018, the field has estimated assets of 9.9 million standard cubic meters of oil equivalent of oil and fifty one.1 million standard cubic meters of oil equivalent of fuel.
The system used comprises three important 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 gas 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 complex to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard fuel field with various fuel subject products, systems, and providers 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 in order to improve the output to 306 million barrels. These are usually installed on platforms above sea level.
However, Åsgard relies on an underwater system. By using compressors on the seabed the restoration rates are improved and the funding and working costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is more dependable than a platform. The Åsgard system consists of modules for two equivalent 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 a half of the ANDRITZ Group, as did the manufacturing 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 machinery.
Depending on the area of software, the motors could be made from cast iron, bronze or completely different kind 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. เพรสเชอร์เกจน้ำ are fitted with MCT, a particular cooling technology. In designs with interior everlasting magnet motor technology, or IPM for short, these maintenance-free motors can achieve impressive outputs, efficiencies and, consequently, value financial savings.
The efficient and measurable motor cooling system keeps the interior temp- erature as low as potential. Drinking water is used as a cooling liquid, which is why the motors can function in media of as a lot as 75° C. An impeller with optimized suction and supply is mounted at the decrease shaft end of the rotor. One of its two major tasks is cooling and lubricating the close by thrust bearing. By doing so, the impeller ensures there’s a constant circulate of cooling liquid in the right direction.
This liquid strikes through the inside of the motor from the underside to the top. The specifically developed cooling channels outline the exact path over all warmth sources to discharge the heat effectively and systematically. At the highest finish, the heat from the liquid is then discharged through 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 a half of the underwater compressor system, however they’re also an extremely essential part. The entire underwater station can’t function without these motors to drive the pumps. Since first being put in in 2016, 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 varieties the condensate unit together with the pump and conveys these liquids which may be eliminated by the separator upstream of the fuel compressors.
In 2017, as a outcome 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 in depth examine was conducted. Thermal distribution in the cooling flow and the new spots had been analyzed in more detail. The outcomes also led to the design of a brand new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally fully overhauled and fitted with a brand new winding and a brand new rotor. This examine and the implementation of its findings not solely profit the current buyer and future prospects in this case, but also strengthen confidence within the ANDRITZ submersible motor know-how.
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