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 spectacular results.
We are surrounded by gas. From water bottles to the insulation in our houses, natural gasoline is a key ingredient in just about every product we use daily. According to the most recent report issued by the International Gas Union (IGU) in 2019, the worldwide demand in gasoline has been rising by 35% of the previous decade alone.
The causes for this trend are manifold, however the IGU determines three main factors. First, the fee competitiveness of gas in contrast to different energy sources. Secondly, greater security of provide with regard to infrastructure, delivery, and flexible use. Thirdly, gas 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 fuel must be extracted utilizing a sustainable course of. One of the biggest systems is the Åsgard oil and fuel field on the Haltenbanken, 200 km off the coast of Norway. It contains 52 wells combined in 16 gas fields and connected by 300 km of oil pipelines. As of December 2018, the sphere has estimated assets of 9.9 million standard cubic meters of oil equal of oil and fifty one.1 million commonplace cubic meters of oil equivalent of gasoline.
The system used comprises three important areas: Åsgard A, B, and C. Åsgard A is a floating oil manufacturing 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 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 complicated to the north of Stavanger, Norway.
First in the world Aker Solutions ASA has been supporting the Åsgard gasoline subject with varied fuel area products, systems, and services since 2010. In time, the stress in the storage facility in gas-producing fields drops. Compressors are needed to sustain the output. weksler ea14 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 degree.
However, Åsgard relies on an underwater system. By utilizing compressors on the seabed the recovery charges are improved and the funding and operating costs are decreased. In addition, underwater compression leaves a smaller ecological footprint and is extra dependable than a platform. The Åsgard system consists of modules for 2 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, grew to become 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 appropriate for driving deep nicely pumps, backside consumption pumps, suction pumps, seawater pumps, and underwater equipment.
Depending on the area of utility, the motors can be made of cast iron, bronze or different sort 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 special cooling know-how. In designs with interior everlasting magnet motor know-how, or IPM for brief, these maintenance-free motors can obtain spectacular outputs, efficiencies and, in consequence, cost financial savings.
The efficient and measurable motor cooling system keeps the inside 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 much 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 nearby thrust bearing. By doing so, the impeller ensures there’s a fixed move of cooling liquid in the best course.
This liquid moves via the within of the motor from the bottom to the highest. The specially developed cooling channels outline the precise path over all warmth sources to discharge the heat successfully and systematically. At the top finish, the warmth from the liquid is then discharged through the motor’s outer wall. Here, it’s transferred by way of the surface of the motor to the medium to be pumped.
The ANDRITZ submersible motors are only a tiny part of the underwater compressor system, however they’re additionally a particularly important part. The entire underwater station cannot operate with out these motors to drive the pumps. Since first being put in 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 these liquids which are eliminated by the separator upstream of the gasoline compressors.
In 2017, due to a failure in part of the system which was not equipped by ANDRITZ, the motor was sent in for repairs, throughout which an in depth study was performed. Thermal distribution within the cooling move and the new spots were analyzed in more element. The results also led to the design of a model 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 research and the implementation of its findings not only profit the present customer and future prospects on this case, but additionally strengthen confidence in the ANDRITZ submersible motor technology.
Share