WO2015127524A1 - Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps - Google Patents

Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps Download PDF

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Publication number
WO2015127524A1
WO2015127524A1 PCT/BR2015/050018 BR2015050018W WO2015127524A1 WO 2015127524 A1 WO2015127524 A1 WO 2015127524A1 BR 2015050018 W BR2015050018 W BR 2015050018W WO 2015127524 A1 WO2015127524 A1 WO 2015127524A1
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WO
WIPO (PCT)
Prior art keywords
fluid
pump
installation
control
barrier
Prior art date
Application number
PCT/BR2015/050018
Other languages
French (fr)
Portuguese (pt)
Inventor
Leonardo SALINO CUNHA
Steven KRONEMBERGER
Eduardo WONG CARDOSO
Nicholas JOHN FLETCHER
Alan ZARAGOZA LABES
Original Assignee
Fmc Technologies Do Brasil Ltda
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Fmc Technologies Do Brasil Ltda filed Critical Fmc Technologies Do Brasil Ltda
Priority to EP15755450.2A priority Critical patent/EP3112582A4/en
Priority to US15/121,896 priority patent/US20170009772A1/en
Priority to AU2015222707A priority patent/AU2015222707A1/en
Priority to SG11201607131UA priority patent/SG11201607131UA/en
Publication of WO2015127524A1 publication Critical patent/WO2015127524A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps

Definitions

  • the present invention addresses the use of control fluid from hydrocarbon production equipment as a barrier fluid for subsea pump coupled electric motors.
  • pumps are also used to inject water into a producer or disposal reservoir.
  • Submersible Centrifugal Pumps are the most commonly used type of centrifugal pumps for oil production. These pumps were initially designed to operate within wells and are therefore constructively long and slim. To operate, they do not need an external supply of barrier fluid to the motor as the barrier fluid is isolated and compensated for the process through a set of seals, which isolate the motor pump.
  • the electric motor housing is generally in communication with the surrounding environment such that the internal cavity of the motor is filled with air.
  • this pump has a shaft sealing system that prevents the pumped fluid (process fluid) from leaking into the environment.
  • This seal is known as a mechanical, dynamic or rotary seal. As a seal that needs to seal against two surfaces with relative movement between them, the The seal is not completely effective, allowing a small leakage of process fluid out of the pump housing.
  • a commonly used method for controlling seal leaks is to eliminate the open space between the pump seal and the motor seal so that process fluid leaks from the pump are forced into the motor housing.
  • the engine itself is completely sealed from the surrounding seawater by static seals.
  • To prevent the process fluid from entering the engine its internal cavity is filled with another fluid called a barrier fluid.
  • barrier fluid is separated from process fluid by a set of seals designed to equalize pressures between process and barrier fluid, to allow expansion and contraction of barrier fluid due to variation. temperature and isolate the process fluid from the barrier fluid.
  • the engine compartment is filled with dielectric oil before the pump is installed in its operating location and a continuous supply of barrier fluid from an external source is not required.
  • there is no need to actively control pressure and no barrier fluid consumption is anticipated. This arrangement simplifies operation, but tends to shorten equipment life.
  • barrier fluid As there is a small but constant consumption of barrier fluid, an external source is necessary to supply this fluid and also to provide the necessary pressure to ensure overpressure in the engine compartment.
  • the barrier fluid is also intended to lubricate the pump and motor bearings, as well as assist with thermal management of the equipment.
  • Dielectric fluid is typically a low viscosity mineral oil. Low viscosity is desirable to minimize drag losses caused by the presence of liquid in the space between the rotor and stator. Mineral oil is chosen because of its good dielectric properties.
  • Fluid is specially purchased - there is no other use for this fluid in the oil rig environment.
  • this fluid is imported, since there is no national production. It is transported in pylons to the platform to which the pump is attached, and is stored until required to complete the booster unit reservoir.
  • the pressurization unit or hydraulic power unit (HPU)
  • HPU hydraulic power unit
  • barrier fluid which is pressurized through electric pumps and accumulators.
  • Control valves allow the directing fluid to the umbilical which in turn conducts fluid to the subsea pump.
  • FIG. 1 Schematic view of installations for the use of barrier fluid in electric motors coupled to underwater pumps, according to the state of the art.
  • FIG. 1 Schematic view of the installation for use of the control fluid as a barrier fluid for subsea pump coupled electric motors in accordance with the present invention.
  • FIG. 1 The use of state-of-the-art barrier fluid depicted in Figure 1 comprises an installation consisting of two independent hydraulic power units (HPU), two umbilicals and two platform connections for the barrier fluid management process. for electric motors coupled to subsea pumps and for control fluid for the subsea system, respectively.
  • HPU independent hydraulic power units
  • HPU independent hydraulic power units
  • umbilicals and two platform connections for the barrier fluid management process.
  • electric motors coupled to subsea pumps and for control fluid for the subsea system, respectively.
  • HPU hydraulic power unit
  • MQC hydraulic couplings
  • the implementation and use of the present invention notably comprises the reconfiguration of the subsea hydraulic distribution. In specific cases, some modification of the platform HPU may be necessary, such as increasing reservoirs, accumulators or pump flow.
  • Pressure regulation within the engine compartment is performed by a set of regulating valves mounted near the pump, the control HPU being responsible for providing a constant fluid pressure that is directed to the pump.
  • a single hydraulic power unit (HPU) (5) is provided, provided with water-based hydraulic control fluid, which is connected by an umbilical (6) to the termination unit.
  • umbilical (9) where normally a control module (8) and valves and chokes (11) are interconnected via hydraulic coupling plates (MQC) (7).
  • MQC hydraulic coupling plates
  • a hose (HFL) (12) is provided to connect the umbilical termination unit (9) via one of the plates (MQC) (7) and the electric motor (2) of the pump (1 ) so that the water-based hydraulic control fluid can also be used as a barrier fluid in the motor and centrifugal pump assembly. This installation allows an overpressure of the barrier fluid to the process fluid inlet (3).
  • control fluid cleaning quality is the same as that required for pump operation, ie there will be no need to change the fluid quality requirements to use it as a barrier fluid.
  • the application of such a new installation according to the present invention will substantially decrease the cost and complexity of deploying and operating an underwater pumping system.
  • the electric motor will already be designed to work immersed in a water-based fluid, contamination of the barrier fluid with process fluid or seawater will not cause short circuit motor failures.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention relates to the use of water-based control fluid in subsea systems as barrier fluid for electric motors (2) coupled to subsea pumps (1). For that purpose, a hose (HFL) (12) is arranged, by means of an MQC plate (7), between an umbilical termination unit (9) and the electric motor (2) of the submersible pump (1). This installation makes more rational use of space in the floating unit by reducing the number of devices required for the implementation thereof, and by facilitating logistics regarding these products and devices.

Description

"INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS"  "INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR ELECTRIC MOTORS COUPLED TO UNDERWATER PUMPS"
Campo da Invenção  Field of the Invention
[01 ] A presente invenção trata da utilização de fluido de controle de equipamentos de produção de hidrocarbonetos como fluido de barreira para motores elétricos acoplados a bombas submarinas.  [01] The present invention addresses the use of control fluid from hydrocarbon production equipment as a barrier fluid for subsea pump coupled electric motors.
Histórico da Invenção  Invention History
[02] Até o presente momento a utilização de bombas submarinas tem apresentado resultados muito positivos para o aumento da produção de óleo e gás em campos submarinos no Brasil e no mundo. [02] To date, the use of subsea pumps has shown very positive results for increasing oil and gas production in subsea fields in Brazil and worldwide.
[03] Essa tecnologia começou a ser utilizada para produção de hidrocarbonetos em campos terrestres e, com o desenvolvimento de campos marítimos, sua aplicação foi estendida para poços submarinos.  [03] This technology began to be used for hydrocarbon production in terrestrial fields and, with the development of maritime fields, its application was extended to subsea wells.
[04] Além da utilização de bombas como ferramenta para bombeio de hidrocarbonetos, essas bombas também são utilizadas para injeção de água em um reservatório produtor ou de descarte.  [04] In addition to the use of pumps as a hydrocarbon pumping tool, these pumps are also used to inject water into a producer or disposal reservoir.
[05] As Bombas Centrífugas Submersas (BCS) são o tipo de bombas centrífugas mais utilizadas para produção de petróleo. Essas bombas foram inicialmente concebidas para operar dentro dos poços e por isso são construtivamente longas e esguias. Para operar, elas não precisam de suprimento externo de fluido de barreira para o motor, pois o fluido de barreira é isolado e compensado em relação ao processo através de um conjunto de selos, que isola a bomba do motor.  [05] Submersible Centrifugal Pumps (BCS) are the most commonly used type of centrifugal pumps for oil production. These pumps were initially designed to operate within wells and are therefore constructively long and slim. To operate, they do not need an external supply of barrier fluid to the motor as the barrier fluid is isolated and compensated for the process through a set of seals, which isolate the motor pump.
[06] Com o aumento da demanda de bombas para utilização submarina foram desenvolvidos novos conceitos de sistemas de bombeamento, mais adequados para utilização no leito marinho. [06] As demand for subsea pumps has increased, new concepts of pumping systems have been developed that are better suited for use on the seabed.
[07] Em aplicações de bombas de superfície, geralmente o alojamento do motor elétrico está em comunicação com o ambiente em sua volta, de tal maneira que a cavidade interna do motor é preenchida com ar. Quando o motor está acoplado a uma bomba, esta bomba tem um sistema de selagem no eixo que impede o vazamento do fluido bombeado (fluido de processo) para o meio ambiente.  [07] In surface pump applications, the electric motor housing is generally in communication with the surrounding environment such that the internal cavity of the motor is filled with air. When the motor is coupled to a pump, this pump has a shaft sealing system that prevents the pumped fluid (process fluid) from leaking into the environment.
[08] Esse selo é conhecido como selo mecânico, dinâmico ou rotativo. Por ser um selo que precisa vedar contra duas superfícies com movimento relativo entre elas, a vedação não é completamente eficaz, permitindo um pequeno vazamento do fluido de processo para fora do compartimento da bomba. [08] This seal is known as a mechanical, dynamic or rotary seal. As a seal that needs to seal against two surfaces with relative movement between them, the The seal is not completely effective, allowing a small leakage of process fluid out of the pump housing.
[09] Existe, em geral, um compartimento aberto, entre o motor e a bomba, que garante que qualquer vazamento do fluido de processo seja recolhido e encaminhado para descarte adequado. Nas aplicações submarinas, porém, o escape de qualquer quantidade de fluido de processo para o ambiente é inaceitável, pois isto significaria a contaminação da água do mar.  [09] There is generally an open compartment between the motor and the pump that ensures that any process fluid leakage is collected and sent for proper disposal. In subsea applications, however, the escape of any amount of process fluid into the environment is unacceptable as this would mean contamination of seawater.
[010] Um método comumente utilizado para controlar vazamentos do selo é eliminar o espaço aberto entre o selo da bomba e do motor, de modo que vazamentos de fluido de processo provenientes da bomba sejam obrigados a entrar no alojamento do motor. O motor em si é totalmente vedado da água do mar ao seu redor por selos estáticos. Para que o fluido de processo não entre no motor, sua cavidade interna é preenchida com outro fluido, chamado fluido de barreira.  [010] A commonly used method for controlling seal leaks is to eliminate the open space between the pump seal and the motor seal so that process fluid leaks from the pump are forced into the motor housing. The engine itself is completely sealed from the surrounding seawater by static seals. To prevent the process fluid from entering the engine, its internal cavity is filled with another fluid called a barrier fluid.
[01 1 ] Em bombas tipo BCS, o fluido de barreira é separado do fluido de processo através de um conjunto de selos que tem por objetivo equalizar as pressões entre processo e fluido de barreira, permitir expansão e contração do fluido de barreira devido à variação de temperatura e isolar o fluido de processo do fluido de barreira. Nesse caso, o compartimento do motor é preenchido com óleo dielétrico antes da instalação da bomba em seu local de operação e não se faz necessário o suprimento contínuo de fluido de barreira de uma fonte externa. Além disso, não é preciso controlar a pressão de forma ativa, nem é previsto consumo de fluido de barreira. Este arranjo simplifica a operação, porém tende a reduzir a vida útil do equipamento.  [01 1] In BCS-type pumps, barrier fluid is separated from process fluid by a set of seals designed to equalize pressures between process and barrier fluid, to allow expansion and contraction of barrier fluid due to variation. temperature and isolate the process fluid from the barrier fluid. In this case, the engine compartment is filled with dielectric oil before the pump is installed in its operating location and a continuous supply of barrier fluid from an external source is not required. In addition, there is no need to actively control pressure and no barrier fluid consumption is anticipated. This arrangement simplifies operation, but tends to shorten equipment life.
[012] Em bombas projetadas para operar no leito marinho, a solução mais comum é utilizar apenas um selo separando o fluido de processo do fluido de barreira, solução significativamente mais compacta que a utilizada para BCS. Porém, com esse arranjo, não é possível garantir, que não ocorrera contaminação (vazamento através do selo) do fluido de barreira com o fluido de processo. [012] In pumps designed to operate on the seabed, the most common solution is to use only one seal separating the process fluid from the barrier fluid, a significantly more compact solution than that used for BCS. However, with this arrangement, it is not possible to guarantee that there will be no contamination (leakage through the seal) of the barrier fluid with the process fluid.
[013] Para prevenir a contaminação do fluido de barreira, o mesmo é mantido a uma pressão superior ao fluido de processo no lado da bomba. Assim, qualquer vazamento pelo selo do eixo ocorrerá somente no sentido do motor para a bomba. De modo geral, tais vazamentos são pequenos e não impactam significativamente o funcionamento dos equipamentos submarinos.  [013] To prevent contamination of the barrier fluid, it is maintained at a higher pressure than the process fluid on the pump side. Thus, any leakage through the shaft seal will occur only in the motor direction to the pump. Overall, such leaks are small and do not significantly impact the operation of subsea equipment.
[014] Nesse caso, como existe um consumo pequeno, porém constante, de fluido de barreira, se faz necessária uma fonte externa para suprir este fluido e também para fornecer a pressão necessária para garantir a sobrepressão no compartimento do motor. In this case, as there is a small but constant consumption of barrier fluid, an external source is necessary to supply this fluid and also to provide the necessary pressure to ensure overpressure in the engine compartment.
[015] O fluido de barreira também tem como finalidade lubrificar os mancais da bomba e do motor, além de ajudar no gerenciamento térmico do equipamento.  [015] The barrier fluid is also intended to lubricate the pump and motor bearings, as well as assist with thermal management of the equipment.
[016] Uma vez que o enrolamento do motor é exposto a este fluido de barreira, geralmente se escolhe um fluido com propriedades dielétricas. Assim, mantém-se o isolamento do enrolamento mesmo que existam pequenos defeitos no isolamento de esmalte dos fios do enrolamento - um problema que não existe para o motor convencional com ar. [016] Since the motor winding is exposed to this barrier fluid, a fluid with dielectric properties is generally chosen. Thus, winding insulation is maintained even if there are minor defects in enamel insulation of winding wires - a problem that does not exist for the conventional air motor.
[017] O fluido dielétrico é tipicamente um óleo mineral de baixa viscosidade. A baixa viscosidade é desejável para minimizar as perdas oriundas do arraste causado pela presença do líquido no espaço entre o rotor e o estator. Escolhe-se óleo mineral devido às suas boas propriedades dielétricas.  Dielectric fluid is typically a low viscosity mineral oil. Low viscosity is desirable to minimize drag losses caused by the presence of liquid in the space between the rotor and stator. Mineral oil is chosen because of its good dielectric properties.
[018] Por ser um fluido específico, não utilizado em outras funções presentes nos equipamentos submarinos, é necessário criar uma infraestrutura dedicada para suprir este fluido, desde logística para fornecimento deste à plataforma, até equipamentos que são instalados na plataforma e no ambiente submarino para direcionamento do fluido de barreira até a bomba.  [018] As it is a specific fluid not used in other functions present in subsea equipment, it is necessary to create a dedicated infrastructure to supply this fluid, from logistics to supply it to the platform, to equipment that is installed on the platform and in the subsea environment for directing the barrier fluid to the pump.
[019] Os problemas e dificuldades para utilização do fluido de barreira começam nas características e propriedades requeridas pelo mesmo. Para manter as propriedades dielétricas e garantir a integridade do motor, é necessário um controle rigoroso da contaminação por água, mesmo em pequenas proporções. Além disso, este óleo tem grande tendência a absorver umidade do ambiente o que exige testes periódicos para avaliar o teor de água no fluido armazenado.  [019] The problems and difficulties in using the barrier fluid begin with the characteristics and properties required by it. Maintaining dielectric properties and ensuring engine integrity requires strict control of water contamination, even in small proportions. In addition, this oil has a high tendency to absorb moisture from the environment which requires periodic tests to evaluate the water content in the stored fluid.
[020] O fornecimento do fluido de barreira para o motor submerso envolve vários aspectos conforme descrito a seguir:  [020] The supply of barrier fluid to the submerged motor involves several aspects as described below:
[021 ] O fluido é comprado especialmente - não existe outro uso para este fluido no ambiente de plataformas de produção de petróleo. No caso das plataformas brasileiras este fluido é importado, já que não há produção nacional. Ele é transportado em bombonas até a plataforma na qual a bomba está conectada, sendo estocado até requerido para completar o reservatório da unidade de pressurização.  [021] Fluid is specially purchased - there is no other use for this fluid in the oil rig environment. In the case of Brazilian platforms this fluid is imported, since there is no national production. It is transported in pylons to the platform to which the pump is attached, and is stored until required to complete the booster unit reservoir.
[022] A unidade de pressurização, ou unidade de potência hidráulica (HPU), é instalada nesta plataforma e dedicada a suprir fluido de barreira, que é pressurizado através de bombas elétricas e acumuladores. Válvulas de controle permitem o direcionamento do fluido para o umbilical que por sua vez conduz o fluido até a bomba submarina. [022] The pressurization unit, or hydraulic power unit (HPU), is installed on this platform and is dedicated to supplying barrier fluid, which is pressurized through electric pumps and accumulators. Control valves allow the directing fluid to the umbilical which in turn conducts fluid to the subsea pump.
[023] Além do custo de compra do fluido, aquisição e instalação da unidade hidráulica, há grandes inconveniências operacionais para monitorar o suprimento do fluido em tempo hábil, já que o armazenamento de grande quantidade deste fluido se torna inviável devido à falta de espaço na plataforma. Esta falta de espaço também é crítica para instalação da unidade hidráulica.  [023] In addition to the cost of fluid purchase, acquisition and installation of the hydraulic unit, there are major operational drawbacks to monitoring fluid supply in a timely manner as storing large amounts of this fluid becomes unviable due to lack of space in the unit. platform. This lack of space is also critical for hydraulic unit installation.
[024] Outra limitação técnica é a passagem do fluido pelo "swivef, no caso de plataforma com "turret", exigindo a disponibilidade de uma passagem dedicada.  [024] Another technical limitation is the fluid passing through the swivef in the case of turreted platform, requiring the availability of a dedicated passage.
Breve Descrição das Figuras  Brief Description of the Figures
[025] A presente invenção e seu modo preferencial de execução serão a seguir descritos com referência às figuras em anexo, que de uma forma esquemática e não limitativa de seu escopo, representam: [025] The present invention and its preferred mode of implementation will be described below with reference to the accompanying figures, which in a schematic and non-limiting manner represent:
[026] - Figura 1 - vista esquemática das instalações para utilização de fluido de barreira em motores elétricos acoplados a bombas submarinas, segundo o estado da técnica.  [026] - Figure 1 - Schematic view of installations for the use of barrier fluid in electric motors coupled to underwater pumps, according to the state of the art.
[027] - Figura 2 - vista esquemática da instalação para utilização do fluido de controle como fluido de barreira para motores elétricos acoplados a bombas submarinas, de acordo com a presente invenção.  [027] - Figure 2 - Schematic view of the installation for use of the control fluid as a barrier fluid for subsea pump coupled electric motors in accordance with the present invention.
[028] A utilização de fluido de barreira segundo o estado da técnica representado na Figura 1 compreende uma instalação composta por duas unidades de potência hidráulica (HPU), dois umbilicais e duas conexões na plataforma, independentes para o processo de gerenciamento de fluido de barreira para motores elétricos acoplados a bombas submarinas e para o fluido de controle para o sistema submarino, respectivamente.  [028] The use of state-of-the-art barrier fluid depicted in Figure 1 comprises an installation consisting of two independent hydraulic power units (HPU), two umbilicals and two platform connections for the barrier fluid management process. for electric motors coupled to subsea pumps and for control fluid for the subsea system, respectively.
[029] A instalação representada na Figura 2, objeto da presente invenção, configura uma única unidade de potência hidráulica (HPU), um único umbilical e, consequentemente, uma única interface com a plataforma, tanto para o fluido de barreira como para o fluido de controle, utilizando o mesmo fluido para ambos os propósitos.  [029] The installation shown in Figure 2, object of the present invention, configures a single hydraulic power unit (HPU), a single umbilical and therefore a single interface with the platform for both barrier fluid and fluid. using the same fluid for both purposes.
Descrição Detalhada da Invenção  Detailed Description of the Invention
[030] Em sistemas marítimos, o controle dos equipamentos de produção submarinos é tipicamente hidráulico. Para tal, é instalada na plataforma uma unidade de potência hidráulica (HPU) que fornece, através de um umbilical, fluido pressurizado para o sistema submarino. A distribuição desse fluido para os diversos consumidores - válvulas, "chokes" e módulos de controle - se dá através de mangueiras (HFL) e acoplamentos hidráulicos (MQC). [030] In marine systems, control of subsea production equipment is typically hydraulic. To this end, a hydraulic power unit (HPU) is installed on the platform which supplies, through an umbilical, pressurized fluid to the subsea system. The distribution of this fluid to various consumers - valves, chokes and control modules - is through hoses (HFL) and hydraulic couplings (MQC).
[031 ] É objetivo da presente invenção proporcionar meios de utilização do fluido de controle como fluido de barreira para o motor de bombas submarinas na infra-estrutura já disponível na plataforma e no ambiente submarino. A implementação e utilização da presente invenção compreende, notadamente, a reconfiguração da distribuição hidráulica submarina. Em casos específicos, pode ser necessária alguma modificação na HPU da plataforma, como, por exemplo, aumento dos reservatórios, dos acumuladores ou na vazão das bombas.  [031] It is an object of the present invention to provide means of using the control fluid as a barrier fluid for the underwater pump motor in the infrastructure already available on the platform and in the underwater environment. The implementation and use of the present invention notably comprises the reconfiguration of the subsea hydraulic distribution. In specific cases, some modification of the platform HPU may be necessary, such as increasing reservoirs, accumulators or pump flow.
[032] A regulagem de pressão dentro do compartimento do motor é realizada por um conjunto de válvulas reguladoras montadas juntas à bomba, ficando a HPU de controle responsável por fornecer uma pressão constante de fluido que é direcionado à bomba.  [032] Pressure regulation within the engine compartment is performed by a set of regulating valves mounted near the pump, the control HPU being responsible for providing a constant fluid pressure that is directed to the pump.
[033] A instalação objeto da presente invenção poderá ser bem entendida pela descrição detalhada da Figura 2, onde referências numéricas iguais identificam os mesmos elementos ilustrados na Figura 1 . [033] The installation object of the present invention may be well understood by the detailed description of Figure 2, where like numerical references identify the same elements illustrated in Figure 1.
[034] Em uma plataforma (10) é disposta uma única unidade de potência hidráulica (HPU) (5), provida de fluido de controle hidráulico à base de água, a qual é conectada por um umbilical (6) à unidade de terminação de umbilical (9), onde normalmente um módulo de controle (8) e válvulas e "chokes" (1 1 ) estão interligados através de placas de acoplamentos hidráulicos (MQC) (7). Uma mangueira (HFL) (12) é provida de modo a realizar a ligação entre a unidade de terminação de umbilical (9), através de uma das placas (MQC) (7), e o motor elétrico (2) da bomba (1 ) de forma que o fluido de controle hidráulico à base de água possa ser também utilizado como fluido de barreira no conjunto motor e bomba centrífuga. Essa instalação permite se obter uma sobre pressão do fluido de barreira em relação à entrada (3) do fluido de processo.  [034] On a platform (10), a single hydraulic power unit (HPU) (5) is provided, provided with water-based hydraulic control fluid, which is connected by an umbilical (6) to the termination unit. umbilical (9), where normally a control module (8) and valves and chokes (11) are interconnected via hydraulic coupling plates (MQC) (7). A hose (HFL) (12) is provided to connect the umbilical termination unit (9) via one of the plates (MQC) (7) and the electric motor (2) of the pump (1 ) so that the water-based hydraulic control fluid can also be used as a barrier fluid in the motor and centrifugal pump assembly. This installation allows an overpressure of the barrier fluid to the process fluid inlet (3).
[035] Deve ser ainda observado que o circuito hidráulico proveniente da unidade de potência hidráulica (5) é suficiente para realizar simultaneamente o controle hidráulico do sistema submarino (8, 1 1 ) e do fluido de barreira para o motor elétrico (2) da bomba submarina (1 ).  [035] It should also be noted that the hydraulic circuit from the hydraulic power unit (5) is sufficient to simultaneously perform the hydraulic control of the subsea system (8, 1 1) and the barrier fluid for the electric motor of the underwater pump (1).
[036] Será observado por aqueles versados na arte que a adoção da instalação de acordo com a presente invenção, ao compartilhar o mesmo fluido para controle submarino como fluido de barreira, proporcionará, dentre outras vantagens: Do ponto de vista construtivo: It will be appreciated by those skilled in the art that adopting the installation according to the present invention by sharing the same subsea control fluid as a barrier fluid will provide, among other advantages: From the constructive point of view:
- a possibilidade do aproveitamento da infra-estrutura existente na plataforma, eliminando a necessidade de mais uma unidade de controle (HPU) e assim otimizando o espaço disponível na unidade flutuante, sem tanques reservatório de fluido de barreira, acumuladores, etc, na unidade de pressurização;  - the possibility of taking advantage of the platform's existing infrastructure, eliminating the need for another control unit (HPU) and thus optimizing the available space in the floating unit, without barrier fluid reservoir tanks, accumulators, etc., in the control unit. pressurization;
- a possibilidade do aproveitamento do umbilical de controle, não havendo necessidade de linhas extras para suprir fluido para o motor da bomba já que a redistribuição passará a ser submarina;  - the possibility of using the control umbilical, without the need for extra lines to supply fluid to the pump motor as the redistribution will be submarine;
- o aproveitamento dos canais de hidráulica no "swivel", em caso de plataformas com "turrei";  - the use of swivel hydraulics channels in the case of turrei platforms;
Do ponto de vista de logística:  From the logistics point of view:
- a utilização da logística de fluidos e suprimentos marítimos já existentes, não havendo necessidade de se inserir um novo produto nos contratos de suprimento;  - the use of existing maritime fluids and supplies logistics, with no need to insert a new product into supply contracts;
Do ponto de vista qualitativo:  From the qualitative point of view:
- a qualidade de limpeza do fluido de controle é a mesma exigida para operação da bomba, ou seja, não haverá necessidade de mudar os requisitos de qualidade do fluido para utilizá-lo como fluido de barreira.  - The control fluid cleaning quality is the same as that required for pump operation, ie there will be no need to change the fluid quality requirements to use it as a barrier fluid.
[037] Como se pode também observar, a aplicação dessa nova instalação segundo a presente invenção diminuirá substancialmente o custo e a complexidade de implantação e operação de um sistema de bombeamento submarino. Além disso, como o motor elétrico já será projetado para trabalhar imerso em um fluido à base de água, a contaminação do fluido de barreira com o fluido de processo ou água do mar não acarretará falhas do motor por curto circuito.  As can also be seen, the application of such a new installation according to the present invention will substantially decrease the cost and complexity of deploying and operating an underwater pumping system. In addition, as the electric motor will already be designed to work immersed in a water-based fluid, contamination of the barrier fluid with process fluid or seawater will not cause short circuit motor failures.

Claims

Reivindicações Claims
1 . INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, compreendendo uma plataforma (10) na qual se encontra instalada uma única unidade de potência hidráulica (HPU) (5), provida de fluido de controle hidráulico e conectada por um umbilical (6) à unidade de terminação de umbilical (9), onde se interligam um módulo de controle (8) e válvulas e "chokes" (1 1 ) através de placas de acoplamentos hidráulicos (MQC) (7), caracterizada pelo fato de que dita unidade de terminação de umbilical (9) é provida de uma mangueira (HFL) (12) interligando-a com o motor elétrico (2) da bomba (1 ) através de uma das placas de acoplamentos hidráulicos (MQC) (7), de forma que o fluido de controle hidráulico também seja utilizado como fluido de barreira no dito conjunto motor (2) e bomba (1 ) centrífuga.  1 . INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBWAY PUMP MOTORED ENGINES, comprising a platform (10) on which a single hydraulic power unit (HPU) (5) is provided and provided with hydraulic control fluid and connected by an umbilical (6) to the umbilical terminating unit (9), where a control module (8) and valves and chokes (11) are connected via hydraulic coupling plates (MQC) (7), characterized in that said umbilical termination unit (9) is provided with a hose (HFL) (12) interconnecting it with the electric motor (2) of the pump (1) via one of the hydraulic coupling plates (MQC) ) (7), so that the hydraulic control fluid is also used as a barrier fluid in said centrifugal motor (2) and pump assembly (1).
2. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com a reivindicação 1 , caracterizada pelo fato de que dita instalação proporciona a obtenção de uma sobre pressão do fluido de barreira em relação à entrada (3) do fluido de processo.  2. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBMARINE PUMP COUPLED ELECTRIC MOTORS according to claim 1, characterized in that said installation provides an overpressure of the barrier fluid in relation to the inlet. (3) the process fluid.
3. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com a reivindicação 1 , caracterizada pelo fato de que o circuito hidráulico proveniente da unidade de potência hidráulica (5) é suficiente para realizar simultaneamente o controle hidráulico do sistema submarino (8, 1 1 ) e do fluido de barreira para o motor elétrico (2) da bomba submarina (1 ).  3. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBMARINE PUMP COUPLED ELECTRIC MOTORS, according to claim 1, characterized in that the hydraulic circuit from the hydraulic power unit (5) is sufficient to perform simultaneously the hydraulic control of the subsea system (8, 11) and barrier fluid for the electric motor (2) of the subsea pump (1).
4. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com a reivindicação 1 , caracterizada pelo fato de que o fluido utilizado para o controle e para barreira é um fluido à base de água.  4. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBMARINE PUMP COUPLED ELECTRIC MOTORS according to claim 1, characterized in that the fluid used for the control and barrier is a water based fluid.
5. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com qualquer das reivindicações 1 a 4, caracterizada pelo fato de que permite o aproveitamento da infra-estrutura geralmente existente na plataforma. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBWAY PUMP ENGINE ELECTRIC MOTORS, according to any one of claims 1 to 4, characterized in that it allows the use of the infrastructure generally existing in the platform.
6. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com qualquer das reivindicações 1 a 4, caracterizada pelo fato de que permite o aproveitamento do umbilical de controle, sendo a redistribuição do fluido totalmente realizada no ambiente submarino. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBWAY PUMP MOTORED ENGINES according to any one of claims 1 to 4, characterized in that it allows the use of the control umbilical, with the redistribution of the fluid completely. performed in the underwater environment.
7. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com qualquer das reivindicações 1 a 4, caracterizada pelo fato de que em se tratando de plataformas com "turret", os canais de hidráulica no "sw/Ve/"são utilizados para a distribuição do fluido.  INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBWAY PUMP MOTORED ENGINES according to any of claims 1 to 4, characterized in that in the case of turret rigs, the hydraulic channels no "sw / Ve /" are used for fluid distribution.
8. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com qualquer das reivindicações 1 a 4, caracterizada pelo fato de que se utiliza a logística de fluidos e suprimentos marítimos já existentes na plataforma.  8. INSTALLATION FOR USE OF CONTROL FLUID AS BARRIER FLUID FOR SUBMARINE PUMP MOTORED ENGINES according to any one of claims 1 to 4, characterized in that the already existing marine fluid and supply logistics are used on the platform.
9. INSTALAÇÃO PARA UTILIZAÇÃO DE FLUIDO DE CONTROLE COMO FLUIDO DE BARREIRA PARA MOTORES ELÉTRICOS ACOPLADOS A BOMBAS SUBMARINAS, de acordo com qualquer das reivindicações 1 a 4, caracterizada pelo fato de que não há necessidade de se mudar os requisitos de qualidade do fluido de controle para utilização como fluido de barreira.  INSTALLATION FOR USE OF CONTROL FLUID AS A BARRIER FLUID FOR SUBMARINE PUMP MOTORED ENGINES according to any of claims 1 to 4, characterized in that there is no need to change the quality requirements of the control fluid. for use as a barrier fluid.
PCT/BR2015/050018 2014-02-26 2015-02-25 Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps WO2015127524A1 (en)

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EP15755450.2A EP3112582A4 (en) 2014-02-26 2015-02-25 Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps
US15/121,896 US20170009772A1 (en) 2014-02-26 2015-02-25 Installation for using control fluid as barrier fluid for electric motors coupled to subsea pumps
AU2015222707A AU2015222707A1 (en) 2014-02-26 2015-02-25 Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps
SG11201607131UA SG11201607131UA (en) 2014-02-26 2015-02-25 Installation for use of control fluid as barrier fluid for electric motors coupled to subsea pumps

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SG11201607131UA (en) 2016-10-28
US20170009772A1 (en) 2017-01-12
BR102014004572A2 (en) 2015-12-29
AU2015222707A1 (en) 2016-09-15
EP3112582A4 (en) 2017-12-06

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