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MACSEA secures order for Fiber Optic Rotary Joint

This order for the FORJ 291, a MOOG Focal Technologies product, to one of our ROV customers, demonstrates MACSEA’s capability to supply critical parts with efficiency and cost effectiveness in Brazil.

As such, it is part of the scope of supply of our Slip Ring maintenance and repair services, that are currently carried out at our new workshop facilities strategically located in Santa Rita do Sapucai, south region of Minas Gerais.

The FO291 is a multi-pass, singlemode fiber optic rotary joint (FORJ). It is passive and bidirectional, and allows the transfer of optical signals across a rotational interface on 2 to 9 separate singlemode optical fibers.

The FO291 can be combined with our electrical and / or fluid slip rings, giving a single, compact package for optical signals, electrical power and fluid transfer, with ISO 9000 quality.

Other options include fluid-filling for pressure compensation permitting operation at any ocean depth, and the combination of the model 190 to include up to a total of 19 multimode passes.

Features

  • 2 to 9 singlemode channels
  • Can be combined with our electrical slip rings, fluid rotary unions and the model 190 multimode fiber optic rotary joint
  • Alternative drive coupling arrangements are available (consult factory for specification details)
  • Tested to 10,000 psi (69,000 kPa) when fluid-filled
  • Aluminum and stainless steel construction
  • Connectorized interfaces, for easy fiber cable replacement
  • Rugged design
    • MIL-STD-167-1 ship vibration
    • MIL-STD-810 functional shock (40g)

Benefits

  • Can be integrated into existing slip ring designs
  • Passive bidirectional optical transmission
  • Can be combined with our electrical slips and fluid unions
  • Long life

Download the FORJ Model 291 Technical Data Sheet

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Delivering the most advance pipeline inspection software training

We are pleased to successfully deliver survey software training for leading subsea services providers in Brazil.

We are pleased to successfully deliver 3 training courses across May, for our customer base in Brazil throughout the support of our partners EIVA a/s and OARS-HPSG. Where we could prepare both online data acquisition and offline post-processing survey teams of 3 leading subsea services providers for ongoing and upcoming pipeline inspection projects in Brazil.

The scope of the courses was based on the Advanced Pipeline Inspection Software the EIVA Navisuite Nardoa, a cutting-edge, completely integrated 3D software solution for acquisition and processing of data during subsea pipeline and cable route inspections.  Providing a near-real-time processing of large data sets, thereby reducing the timeframe of the inspection job to a minimum. This proven, off-the-shelf software bundle allows to save man-hours and money while delivering high-quality, thorough and comprehensive inspection results to your customers. The software does most of the work, and the man-hours of the team are spent more efficiently on the details that require a human hand. Altogether, this translates into a far more cost-effective inspection workflow.

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Visitação na USP Poli-Santos e Open House

Confirme sua presença no Programa de Visita Monitorada na USP Poli-Santos – Vagas Limitadas

A Escola Politécnica da USP realizará o Programa de Visita Monitorada para alunos das escolas de segundo grau, no Campus de Santos, no dia 05/05/17 das 14:00 às 17:00 h. Foram convidadas escolas estaduais bem como as ETECs da Baixada Santista.

Seguindo-se a Visitação, na mesma data  haverá um segundo evento das 17:00 às 19:00 h – Open House – para o qual foram convidadas autoridades universitárias e de diversos setores industriais e de serviços. O objetivo é apresentar as dependências do edifício que abriga o curso de Engenharia de Petróleo em Santos buscando um estreitamento nas relações com o mundo corporativo.

Data: 5 de Maio de 2017

Horário: 17:00h

Local: Ed. Cesário bastos, Praça Narciso de Andrade, s/n, Vila Mathias, Santos-SP

Confirmar presença através do contato rosetavaresa@usp.br

 

 

 

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Learn more about Correlation Velocity Log (CVL) a new approach to acoustic velocity logs for underwater navigation

The Tritech AquaTrak™ CVL provides greater precision and accuracy than a 1200kHz with the range exceeding a 300kHz DVL.

Underwater navigation is essential for a diverse range of Unmanned Underwater Vehicle (UUV) military and commercial applications. Although GPS and other radio signals have been widely used for surface vessel navigation, these technologies are ineffective for underwater navigation because electromagnetic signals are blocked by seawater. Inertial sensing is a suitable and widely used technology for underwater navigation. However, position error tends to drift in the absence of input from aiding sensors. The most successful combination for underwater navigation has therefore been to combine inertial technology with velocity measurement using acoustic sensors that measure speed from echoes reflected off the seafloor.

The Doppler Velocity Log (DVL) has traditionally been the standard choice for integration into UUV navigation systems. Until now Correlation Velocity Logs (CVL) have not affected this domination of the marketplace because of the high level of signal processing required for correlating pairs of signals in CVLs. However, recent advances in low power electronics and advanced
acoustic correlation signal processing techniques now enable CVLs to offer a superior price and performance value proposition over existing DVLs.

CVLs offer many advantages over DVLs, since they can achieve high accuracy at low velocities even during hover manoeuvres. DVLs use narrow beam widths, while CVL transmitters have wid
e beam widths. This gives CVLs the potential to use lower frequencies thus permitting operation in deeper water; increased accuracy; reduced power requirements for the same depth and smaller form factors.

CVL typical vertical beam                                                         DVL typical tilted beam 

                                                             

Tritech AquaTrak™ Correlation Velocity Log provides both long range navigation and high resolution accuracy. The highly flexible and modular design allows the unit to be used in a standalone configuration or as part of an Integrated Navigation System.

A CVL measures a two-dimensional displacement vector between two receiver channels for successive pulses, so that the corresponding velocity measurement is generated by the
displacement divided by the time interval between pulses, with no need for a speed of sound measurement.

AquaTrak’s piezocomposite transducers operate at 150 kHz enabling altitudes of 300m above the seabed. This operating frequency was selected as an ideal compromise between a deeper propagation of the acoustic pulses (due to the reduction in attenuation with decreasing frequency) while avoiding background noise at lower frequencies. The acoustic power requirements have also been minimized for UUV integration and operation — particularly for autonomous underwater vehicles.

To ensure that the incoming signals used within the correlation calculation result from bottom reflection rather than volume reverberation or background noise, AquaTrak uses advanced Synthetic Aperture Sonar acoustic correlation signal processing techniques. It first determines the height of the instrument above the seabed and uses time of flight calculations to neglect signals detected before this depth threshold.

The unit can therefore operate as an altimeter to verify other onboard instrumentation. The transmitted power is then automatically adjusted to take into account the attenuation of the returns from the seabed caused by transmission and absorption losses by the seafloor. The complex form of the correlation coefficient between two complex acoustic signals is then used by AquaTrak to generate velocity measurements.

The breakthrough in AquaTrak™ CVL was understanding how to use the SAS transducer arrays as a CVL in order to estimate with sufficiently high accuracy the three-dimensional velocity vector, giving the displacement between successive pings. The side-by-side comparison (shown below) of the forward ground speed given by a 300 kHz SAS used as a CVL and a conventional 600kHz DVL shows the much greater accuracy achieved by the CVL, which provides the evidence of the high potential of CVL technology.

 

 

Along-track velocity of a 600kHz DVL (in grey) compared to that of a ‘through the SAS sensor’ CVL operated at 300kHz, performing correlations in multiple (other colors) 2m range windows varying from 40m to 160m. The ground truth is provided by the quality of the SAS imagery which is focused for the CVL and defocused for the DVL.

 

 

 

Find out more information at Tritech.co.uk

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MACSEA Appoints New Business Development Manager

MACSEA has announced the joining of Leonardo Catanzaro as the company Business Development Manager for its Oil & Gas market sector.

Due to the continued growth of its Oil & Gas activities, MACSEA has strategically appointed Leonardo Catanzaro as Business Development Manager for its new commercial premises in Rio de Janeiro.

His main responsibilities will focus on developing MACSEA’s key customer relationships within Oil & Gas industry and seeking new business opportunities to support our Subsea Asset Integrity / Life-Of-Field business line. The company currently has a wide range of subsea equipment and software solutions throughout its partners globally that meets industry demands for cutting edge technology with cost effectiveness.

Leonardo Catanzaro has a solid background in Marine Sciences with professional and academic accomplishments in the Oceanography, Geology and Geophysics segments. His experience in the Oil & Gas industry, ranges from offshore work for Survey and Subsea Engineering and Offshore Construction. Where, he highlights the participation of one of the largest gas pipe-lay project in Latin America. As well as being the Sales and Business Development Manager for industry renowned manufacturer of subsea technologies. Most recently Leonardo has been acting as an independent survey consultant major Oil & Gas companies on projects for the pre-salt area offshore Brazil.

Antonio Felipe Silva, Commercial Manager at MACSEA commented, “We are extremely delighted to welcome Leonardo Catanzaro to MACSEA team, we have major growth plans for our Subsea Asset Integrity / Life-Of-Field business line which we hope that with Catanzaro’s potential to tackle complex sales will help us achieve our goals.”

Leonardo Catanzaro commented, “I am delighted for this exciting opportunity to further enhance MACSEA’s business in the Oil & Gas sector. MACSEA has a strong market reputation for world-class products and services it offers to customers locally. I hope to use my expertise to target new clients in this important market sector and also to add value to the Subsea Asset Integrity / Life-Of-Field solutions that MACSEA already has to offer.”

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MACSEA supplies multibeam sonar for C-Innovation ROV

Tritech’s range of Gemini multibeam imaging sonars are rapidly becoming the sonar operators adopt to navigate, visualise and monitor in poor visibility and turbid warters.

C-Innovation do Brasil recently used the deep-rated Gemini 720i to inspect the hull of an FPSO turret; to inspect a repair and to monitor the surrounding environment.
The inspection was to locate a repair, approximately 40cm wide, on the hull of the FPSO. During the operation, the vehicle was slightly elevated and tilted towards the riser and held at a depth of 15 m away from the hull of the FPSO, due to the vast number of risers and mooring lines; therefore the Gemini sonar was operating at long-range.
C-Innovation operated a Schilling ROV, as fitted with the Gemini 720id and Tritech’s local service partner, MACSEA Ltda provided local customer technical support for the demonstration.

Renan Ocampo, Support Technician, MACSEA commented:
“We developed the Gemini brackets based on Schilling ROV frame, making it adjustable and easy to install, providing a good inspection angle.”

Alex Maia, General Manager, C-Innovation do Brasil commented:
“Our ROV fleet is adaptable to host many plug-and-play technologies, including Tritech’s Gemini. We have made several riser inspections where the Gemini helped quite a lot, especially around the TDP [touch-down point] where there was low visibility, here we could clearly see the trench below the suspension, thanks to the imagery of the Tritech Gemini sonar.”

Tomás Peixoto, ROV Operations Coordinator, C-Innovation do Brasil commented:
“We were amazed by the image quality and the operational performance of the Gemini sonar which enhanced our ability to navigate in low visibility, as well as provide a clear window for target identification during the survey. Overall we completed the job in a safe and timely manner.”