In one of many 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 properties, pure fuel is a key ingredient in just about each 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 pattern are manifold, however the IGU determines three primary factors. First, the price competitiveness of gasoline in contrast to other vitality sources. Secondly, larger security of provide with regard to infrastructure, delivery, and flexible use. Thirdly, gasoline represents a sustainable form of energy that may mitigate climate change and lower localized air pollution. It has 50% fewer CO2 emissions compared to coal, for example.
In order to fulfill this growing demand and use, the eco-friendly potential gas must be extracted utilizing a sustainable course of. One of the biggest systems is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells mixed in 16 gasoline fields and related 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 equivalent of gasoline.
The system used contains 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 gasoline and condensate processing platform for processing and stabilizing of gasoline 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 in the world Aker Solutions ASA has been supporting the Åsgard gasoline area with varied fuel area merchandise, techniques, and companies since 2010. In time, the strain within 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 find a way to improve the output to 306 million barrels. These are normally put in on platforms above sea level.
However, Åsgard is based on an underwater system. By using compressors on the seabed the recovery rates are improved and the investment and working prices 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 similar 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 properly pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the world of software, the motors may be manufactured 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 particular cooling know-how. In designs with interior permanent magnet motor technology, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, consequently, price savings.
The effective and measurable motor cooling system retains the interior temp- erature as little as potential. Drinking ไดอะแฟรม is used as a cooling liquid, which is why the motors can operate in media of as a lot as 75° C. An impeller with optimized suction and delivery is mounted at the lower shaft finish of the rotor. One of its two primary duties is cooling and lubricating the nearby thrust bearing. By doing so, the impeller ensures there is a fixed circulate of cooling liquid in the right path.
This liquid moves through the within of the motor from the bottom to the highest. The specially developed cooling channels outline the precise path over all heat sources to discharge the warmth effectively and systematically. At the top finish, the warmth from the liquid is then discharged through the motor’s outer wall. Here, pressure gauge is transferred via the floor of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny a half of the underwater compressor system, however they’re also an extremely necessary part. The complete underwater station cannot operate with out these motors to drive the pumps. Since first being installed in 2016, these submersible motors have been operating 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 those liquids that are removed by the separator upstream of the gas compressors.
In 2017, due to a failure in a half of the system which was not supplied by ANDRITZ, the motor was sent in for repairs, throughout which an extensive research was conducted. Thermal distribution in the cooling flow and the recent spots have been analyzed in more element. 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 new winding and a new rotor. This examine and the implementation of its findings not only profit the current customer and future prospects on this case, but in addition strengthen confidence within the ANDRITZ submersible motor technology.
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