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 results.
We are surrounded by gasoline. From เครื่องมือที่ใช้ในการวัดความดัน to the insulation in our homes, natural fuel is a key ingredient in nearly every product we use every day. According to the most recent report issued by the International Gas Union (IGU) in 2019, the global demand in fuel has been rising by 35% of the past decade alone.
The causes for this pattern are manifold, however the IGU determines three main factors. First, the cost competitiveness of gasoline in distinction to different power sources. Secondly, greater safety of supply with regard to infrastructure, supply, and flexible use. Thirdly, fuel represents a sustainable form of power that may mitigate climate change and decrease localized air pollution. It has 50% fewer CO2 emissions in comparison with coal, for example.
In order to satisfy this growing demand and use, the eco-friendly potential gasoline must be extracted utilizing a sustainable process. One of the largest methods is the Åsgard oil and gas area on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells mixed in sixteen fuel fields and related by 300 km of oil pipelines. As of December 2018, the field has estimated resources of 9.9 million commonplace cubic meters of oil equivalent of oil and fifty one.1 million normal cubic meters of oil equal of fuel.
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 permanently 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 gasoline 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 subject with varied fuel subject merchandise, methods, and providers since 2010. In time, the pressure 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 so as to increase the output to 306 million barrels. These are usually installed on platforms above sea stage.
However, Åsgard relies on an underwater system. By utilizing compressors on the seabed the recovery charges are improved and the investment and working prices are reduced. In addition, underwater compression leaves a smaller ecological footprint and is more dependable than a platform. The Åsgard system consists of modules for 2 identical units of compressors, pumps, scrubbers, and coolers. The motors wanted to drive the pumps come from ANDRITZ.
Small, but important
In 2010, Ritz Pumpenfabrik GmbH in Schwäbisch-Gmünd, Germany, turned ANDRITZ Ritz GmbH and 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 properly pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the realm of utility, the motors can be made from forged iron, bronze or totally different kind of stainless-steel and put in 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 expertise. In designs with inside permanent magnet motor expertise, or IPM for brief, these maintenance-free motors can achieve impressive outputs, efficiencies and, as a result, value financial savings.
The efficient and measurable motor cooling system retains the inside temp- erature as low as attainable. 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 delivery is mounted on the decrease shaft finish of the rotor. One of its two main duties 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 proper path.
This liquid moves by way of the inside of the motor from the underside to the highest. The specially developed cooling channels outline the exact path over all warmth sources to discharge the warmth effectively and systematically. At the highest finish, the warmth from the liquid is then discharged via the motor’s outer wall. Here, it is transferred by way of the floor 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 are additionally an especially essential half. The entire underwater station cannot function without these motors to drive the pumps. Since first being put in in 2016, these submersible motors have been working without any 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 those liquids which are eliminated by the separator upstream of the gas compressors.
In 2017, due to a failure in a part of the system which was not provided by ANDRITZ, the motor was sent in for repairs, throughout which an intensive research was performed. Thermal distribution within the cooling move and the recent spots were analyzed in additional element. The results additionally led to the design of a brand 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 new rotor. This research and the implementation of its findings not only benefit the current buyer and future customers on this case, but in addition strengthen confidence within the ANDRITZ submersible motor technology.
Share