Stewart Technology Associates Improves the Seakeeping Analysis for Shipping

[Posted on June 25th 2014 by Bill Stewart]

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Stewart Technology Associates are experts in mechanical and geographical technology of the offshore industries seakeeping analysis processes. This is the essence of the STA marine strategies. This company has brought Jack-ups and liftboats to aid marine offshore businesses for years. It also provides information that leads to correct calculations in the preparation of shipping conditions.

As an expert in the field the president of this resourceful technology company, Mr. W. P. Stewart, is a leading person in the mariner field. Called upon in events concerning sea related accidents, Bill Stewart is a seasoned expert. This company developed the jack-up simulator, both physical and software simulators and provides the service of oil spill clean up. The company is involved with risk assessment for mariner equipment.

Established in 1986, STA is qualified in geotechnical technology. The company’s devices have improved the safety and methods of factoring mooring analysis for vessels and the use of training simulators. This company’s equipment is used to further the preparedness of water safety agencies in many countries. Seakeeping analysis has been a part of Mr. Stewarts training for over twenty years and remains a part of his expertise. This Houston based firm provides offshore training equipment for a long list of mariner companies.

Using the companies design and analysis services to improve sea operations this company caters to a number of clients around the globe, up grading the necessary software and equipment that keeps oil rigs and seafaring equipment moving. The mariner community is limited to a few experts and Bill Stewart of Stewart Technology Associates happens to be one of them. Developing tools that propelled shipping into a better industry, the jack-up simulator and the ballast control simulator, this company is standing on the forefront of mariner innovations.

Stewart Technology Associates has acted as a marine specialist making pipe/pump software packages, these items are updated by the company. Mariner developers around the world use the technology developed by STA, with Jack up simulators distributed as a separate item or connected with the full simulator.

Heavily qualified in Seakeeping analysis, STA has the ability to effectively determine if a vessel is able to maintain its integrity in the sea environment. People trained to deal with oceanic conditions are trained on simulators designed by Stewart Technologies Associates.

Ships and barges are a part of the scenery today out on the sea but these water vessels need trained people and strong materials to keep them afloat. This company has developed a strategy that test equipment, trains people and keeps equipment sea worthy, allowing them to test and calculate a vessels seaworthy ability before it is challenged by the oceans fury.

Riser Analysis Is Important for Platform Production

[Posted on June 20th 2014 by Bill Stewart]

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A thorough riser analysis is important for platform production reasons, particularly for offloading fluids. State-of-the-art marine technology software, such as Orcina’s OrcaFlex package, permits an accurate evaluation, identifying areas that may need improvement.

Risers, vital to oil and gas offshore platform production and transfer, are responsible for the safe, efficient transmission of fluids or gas from drilling facilities to collection vessels, typically tankers. Drilling companies need accurate riser analyses from qualified engineering firms to ensure proper design and installation of these systems.

Some Components of Evaluating Risers

In most cases, this analysis, formerly classified as “static,” has been supplanted by new technology, permitting a more effective “dynamic” evaluation process. State-of-the-art technology has improved the quality of riser evaluation studies.

  • Assess the requirements placed on risers, particularly when facing strong wave action in deeper sea depths.
  • Responses of undersea risers to ocean currents and formidable surface waves.
  • Predictions of dynamic behavior when embroiled in excessive environmental and external loads.
  • Evaluation of the potential external forces, both undersea and surface conditions that can affect riser and deep ocean pipe performance.
  • Transfer efficiency of platform liquids or gas to surface collection vessels.
  • Effects of wave-generated and tidal currents on riser systems.
  • Response of risers to “static axial force” and wave load in normal and extreme environments.

These are some components of riser analysis that produce results that are either encouraging or disappointing to companies with previously installed systems. During the design phase, these analysis results will either confirm or recommend changes in riser installation plans.

In all cases, this evaluation is critical to current and future offshore platform production. For instance, outstanding drilling platform production that faces serious challenges during transfer to surface collection vessels can reduce the true production quotient of the operation.

Current technology is a vast improvement over the classic static analysis of former evaluations. The ability to computers to simulate environments and possible effects enhance the quality of the analysis and its conclusions.

Experience Is Important

Technology alone does not replace experience in analyzing riser efficiency or durability. Experience working with riser designs and real-world installations helps evaluators make more accurate conclusions regarding the risers under study.

For example, Stewart Technology Associates has compiled over 20 years’ experience performing riser analysis. Founder Bill Stewart, P.E., long ago committed to intense study of risers. He has since dedicated his studies to advancing the knowledge base surrounding marine studies of riser technology and performance limitations.

Our company has earned an impressive reputation for excellence in marine analysis and problem solving. One of our specialties is analyzing risers for companies around the world. As a member the Society of Naval Architects, Bill Stewart has a background to match his expertise with riser analysis. This evaluation is similar to a seakeeping analysis in that it identifies the “seaworthiness” of undersea risers.

When combined with extensive experience working with and analyzing risers, current technology, like OrcaFlex software, enables professionals, such as Stewart Technology Associates, evaluate riser systems of any type accurately. The scientific analysis results provided by the technology are interpreted correctly, predicting how the studied risers will perform in all sea conditions and environments.

OrcaFlex Software Has Multiple Talents

[Posted on June 13th 2014 by Bill Stewart]

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Technology plays an important role in offshore and marine industries. OrcaFlex software has multiple talents to help with structural dynamics and hydrodynamic analysis of structures.

Designed by mechanical and software engineers, naval architects and mathematicians, this software was developed by Orcina Ltd. professionals to analyze diverse marine systems.

Some Features of This Software

This top-rated software assists in the design of the following marine systems.

  • Riser systems;
  • Mooring systems for offshore structures;
  • Installation plans for diverse scenarios;
  • Towed offshore systems; and
  • Defense systems, marine renewables and seabed stability solutions.

With its incredible power combined with a wonderful GUI, this software package is the optimum marine services program available today. Its sister software, OrcaLay and OrcaBend work in concert to provide pipe lay and bend stiffener design and analysis.


The software helps with design and installation of production risers. Needed to transfer fluids to and from vessels, these conductor pipe systems are essential to the efficiency of deep water production systems.

OrcaFlex software also offers assistance with both types of drilling risers. When designing and installing marine drilling risers, which typically are used by floating drilling vessels, and tie-back risers, used by fixed drilling platforms in conjunction with surface blowout preventers, help anchor either single high-pressure pipes or sets of concentric pipes.


Also known as single buoy moorings, single point moorings keep one or more tankers stationary while offloading gas or liquid from platforms. The software allows users to plan how to deploy the buoys for maximum efficiency.

CALM (Catenary Anchor Leg Mooring) buoys include multiple legs (tethers) and a turntable, allowing vessels to “weathervane” while accepting the transfer of fluids from platforms. Mooring tankers to these buoys gives platforms more flexibility to transfer gas or fluid in varied weather and sea conditions.

The software’s excellent GUI, graphically displays the alternative deployment options to most mooring designs, allowing users to visualize, analyze and evaluate the best choice for installation. Instead of costly trial-and-error methods, OrcaFlex shows the variety of available options for deployment.

Other Applications

Along with displaying multiple options for the vital deployment of risers and moorings, OrcaFlex offers other applications, making it one of the most versatile programs in the marine industry. Other valuable applications include the following items.

  • Installation evaluation and analysis;
  • Buoy system options;
  • Hose variations, including under-buoy, offloading and floating hose systems;
  • Defense issues, including minesweeping research and helicopter landing options; and
  • Renewable energy systems, including wave power and wind farm modeling.

It is evident that OrcaFlex software helps companies and consultants plan, design and deploy the primary marine systems applying to both vessels and offshore platforms. Stewart Technology Associates specializes in using this technology to deliver our outstanding marine consulting services.

Our extensive expertise, combined with this powerful software package, gives us the tools to design solutions to most marine-related issues. We also feature forensic analysis to identify prior problems or create evidence for expert testimony responsibilities. Combined with our riser and mooring experience, we offer a wide variety of efficient solutions for a myriad of structural and offshore marine systems.

Stewart Technology Associates Excels at Mooring Analysisv

[Posted on June 9th 2014 by Bill Stewart]

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Stuart Technology Associates has been one of the biggest names in mooring analysis for years, and is used by companies from all around the world to conduct this important piece of research for them. Any company that works in the above-the-surface marine industry, be it drilling rigs, modular housing for offshore workers, platforms, or any type of structure that is required to rest on the ocean’s surface, needs a good analysis of their mooring done before beginning to work. If the mooring is off, then the whole structure can become unstable, putting those who live or work on those structures at risk. At Stuart Technology Associates, we have proven to be such a reliable name in this industry that most of our clients now come to us through word of mouth. That is the power behind what we do.

Of course, we don’t want you to just take another company’s word for it. We want you to know why you should choose us to do your mooring analysis. If you are already a client, we want you to know why you should continue to work with us. Here are the main factors that set us above the crowd in the marine technology industry.

Exceptional Reputation

You don’t get a solid reputation for excellence in this industry unless you can actually deliver it. We have proven time and time again that we have what it takes to give our clients the highest quality analysis in the business. You can trust what we tell you, because we have extensive experience and we take what we do very seriously. This is why so many of our clients continue to come back to us for their new projects, and to refer other companies to us.

Our reputation is as good as it is because we are meticulous, experienced, and have a detailed knowledge of what needs to be done. Doing this type of analysis isn’t appropriate for a new company just starting out, as lives are literally at stake on these ocean structures. We have seen every possible situation the sea can throw at an on-the-surface structure, and we know how to plan around it and for it.

Top Technology

We have access to the top technology in the field. Since marine structure technology is always changing, keeping up can be a challenge. However, we do keep up, and we do it well. As technology advances, we move along with it, and are often among the earliest adopters of new methods of doing our job. As an example, we began using OrcaFlex more than twenty years ago, when it was still a new technology for mooring analysis. Other companies are only just now starting to catch up with us in the use of that particular device. You want a company that is on top of things, and that is us.


In addition to having the reputation, experience, and technology to do your mooring analysis correctly, we also pride ourselves on being affordable without cutting corners on safety. You can trust your project in our hands, every single time.

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