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, pure gasoline is a key ingredient in just about each product we use every day. According to the latest 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, but the IGU determines three main elements. First, the price competitiveness of fuel in contrast to other vitality sources. Secondly, higher security of provide with regard to infrastructure, delivery, and versatile use. Thirdly, gas represents a sustainable type of vitality that may mitigate local weather change and decrease localized air pollution. It has 50% fewer CO2 emissions compared to coal, for instance.
In order to fulfill this growing demand and use, the eco-friendly potential gasoline should be extracted utilizing a sustainable process. One of the most important methods is the Åsgard oil and gas subject on the Haltenbanken, 200 km off the coast of Norway. It accommodates fifty two wells mixed in 16 gas fields and connected by 300 km of oil pipelines. As of December 2018, the sphere has estimated resources of 9.9 million standard cubic meters of oil equivalent of oil and 51.1 million commonplace cubic meters of oil equal of gasoline.
The system used includes 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 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 gasoline pipeline to the Karsto processing advanced to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gasoline area with varied gas subject products, methods, and companies since 2010. In time, the pressure 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 in order to enhance the output to 306 million barrels. These are usually put in on platforms above sea stage.
However, Åsgard is predicated on an underwater system. By utilizing compressors on the seabed the recovery charges are improved and the funding and operating 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 similar sets 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 manufacturing of submersible motors. Due to the renewable winding, ANDRITZ submersible motors are suitable for driving deep well pumps, bottom consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of application, the motors could be manufactured from cast iron, bronze or totally different sort 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 special cooling technology. In designs with interior permanent magnet motor technology, or IPM for short, these maintenance-free motors can obtain impressive outputs, efficiencies and, in consequence, cost savings.
The efficient and measurable motor cooling system keeps the interior temp- erature as low as attainable. 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 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’s a fixed flow of cooling liquid in the right direction.
This liquid moves through the inside of the motor from the underside to the top. The specially developed cooling channels outline the exact path over all heat sources to discharge the heat effectively and systematically. At the top end, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it’s transferred through the floor 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 a particularly necessary half. The complete underwater station can’t function without 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. เกจวัดแรงดันน้ำดิจิตอล with the pump and conveys those liquids which may be removed by the separator upstream of the gas compressors.
In 2017, as a result of a failure in part of the system which was not supplied by ANDRITZ, the motor was despatched in for repairs, throughout which an in depth study was carried out. Thermal distribution in the cooling flow and the hot spots were analyzed in more element. 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 also fully overhauled and fitted with a new winding and a brand new rotor. This examine and the implementation of its findings not solely benefit the present buyer and future prospects in this case, but in addition strengthen confidence within the ANDRITZ submersible motor technology.

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