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 spectacular outcomes.
We are surrounded by gasoline. From water bottles to the insulation in our homes, natural fuel is a key ingredient in virtually every product we use daily. According to the most recent report issued by the International Gas Union (IGU) in 2019, the global demand in gas has been rising by 35% of the previous decade alone.
The reasons for this trend are manifold, however the IGU determines three major elements. First, the price competitiveness of gasoline in distinction to different power sources. Secondly, larger safety of provide with regard to infrastructure, supply, and versatile use. Thirdly, gasoline represents a sustainable type of power that can mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for example.
In order to meet this growing demand and use, the eco-friendly potential gasoline will have to be extracted utilizing a sustainable process. One of the most important techniques is the Åsgard oil and gasoline area on the Haltenbanken, 200 km off the coast of Norway. It incorporates fifty two wells mixed in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the field has estimated assets of 9.9 million commonplace cubic meters of oil equal of oil and 51.1 million normal cubic meters of oil equivalent of gasoline.
The system used includes three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing vessel that has been anchored there completely since extraction started in 1999. Åsgard B is a floating, semi-submersible gas 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 gas pipeline to the Karsto processing complicated to the north of Stavanger, Norway.
First on the earth Aker Solutions ASA has been supporting the Åsgard fuel field with varied gas field merchandise, systems, and providers since 2010. In time, the pressure in the storage facility in gas-producing fields drops. Compressors are needed to maintain the output. Aker delivered the first-ever underwater compressor system worldwide to Åsgard to have the ability to increase the output to 306 million barrels. These are usually put in on platforms above sea level.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the restoration rates are improved and the funding and working prices are decreased. In addition, underwater compression leaves a smaller ecological footprint and is extra reliable than a platform. The Åsgard system consists of modules for 2 equivalent units of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but essential

In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, became ANDRITZ Ritz GmbH and a half of the ANDRITZ Group, as did the production of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are appropriate for driving deep well pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater machinery.
Depending on the area of utility, the motors can be made from forged iron, bronze or different type 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 inside everlasting magnet motor expertise, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, consequently, price savings.
The efficient and measurable motor cooling system retains the inside temp- erature as little as potential. Drinking water is used as a cooling liquid, which is why the motors can function in media of as much as 75° C. An impeller with optimized suction and delivery is mounted at the lower shaft end of the rotor. One of its two main 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 right path.
This liquid strikes via the inside of the motor from the underside to the highest. The specifically developed cooling channels outline the precise path over all heat sources to discharge the warmth effectively and systematically. At the top end, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it is transferred via the surface 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’re also an especially important half. The entire underwater station can’t function with out these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been operating without any faults. เพรสเชอร์เกจดิจิตอล in all, ANDRITZ Ritz delivered three twopole submersible motors with an output of 736 kw. The motor types the condensate unit together with the pump and conveys these liquids which are removed by the separator upstream of the gas compressors.
In 2017, as a outcome of a failure in a part of the system which was not equipped by ANDRITZ, the motor was despatched in for repairs, during which an in depth examine was carried out. Thermal distribution in the cooling flow and the recent spots had been analyzed in more detail. The outcomes also led to the design of a new plate crosssection for the rotor plates.
Because of this, the motor to be repaired was additionally completely overhauled and fitted with a model new winding and a model new rotor. This examine and the implementation of its findings not solely benefit the current buyer and future clients in this case, but also strengthen confidence within the ANDRITZ submersible motor expertise.

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