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Analysing Steel Catenary Risers is Stewart Technology Associates Bread and Butter

[Posted on July 3rd, 2013 by Bill Stewart]

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If you are in the business of operating a deep sea oil rig then you need to talk to the offshore marine specialists at Stewart Technology Associates regarding steel catenary risers and the technical aspects of your mooring system.  Face it, you are working in a demanding environment and everything needs to work perfectly to ensure maximum productivity from your rig, and maximum safety for your crew.  Stewart Technology Associates have been delivering maritime solutions for more than a quarter of a century.

As rigs move into deeper and deeper waters in search of oil the complexity of their design requirements, and the costs associated with retrieving the oil increases exponentially to the challenges posed by the physical environment around them.  As such, throughout the industry, interest is mounting for cost effective solutions for the development of steel catenary risers that are up to the critical task of securing offshore pipeline to your oil production platform.

Utilizing the powerful technology of Orcina’s OrcaFlex software packages, Stewart Technology Associates are recognized as an industry leader in the research and analysis of cable dynamics systems, and has consulted with major gas and oil companies around the world, the United States Navy, and the U.S. Coast Guard to arrive at innovative mooring solutions for a host of associated deep sea environmental challenges.

If risers are a concern, they have a solution for you from top tensioned risers to flexible risers to steel catenary risers and more.  They will harness the highly specialized power of Orcina’s state of art computer software, coupled to decades of experience working in the industry, to solve your technology conundrum.

Those who are in the know in the offshore drilling game know that Stewart Technology Associates can be counted on to isolate their mooring problems, develop innovative solutions, and provide expert advise on implementation of a workable answer that ensures that your drilling operation is not downed for technical reasons when you need it the most.  You can count on them to provide a detailed analysis of your operation that will indicate an appropriate road map to arrive at a specific solution to your specific problem.  When the stakes are high, you bring in the experts to make sure that your equipment and procedures are up to the task that is demanded of them.  Stewart Technology Associates are those experts.

The management, technology experts, and design team at Stewart Technology Associates pride themselves on their consistent delivery of excellence in the maritime oil recovery industry.  From innovative software packages to providing expert marine witnesses to ensuring the maximum efficiency of your offshore rig, Stewart Technology Associates are a trusted partner in the development of offshore platform solutions that firms are looking for today.

Contact them today to find out how they can streamline your process and safeguard your crew as they go about the extraction of oil from the sea floor.  Everything from steel catenary risers to the dynamic analysis and design of critical components is on the table when you contact the experts at Stewart Technology Associates.  Let them help you solve today’s problems with tomorrow’s technology.

Stewart Technology Associates Bring Riser Analysis to the Next Level

[Posted on June 29th, 2013 by Bill Stewart]

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When operating in adverse offshore conditions, a comprehensive riser analysis is crucial to ensuring the safe and effective use of your equipment.  No matter where in the world the next offshore drilling opportunity takes your company, the day to day performance of your crew will be greatly enhanced by knowing that your platform is operating at peak efficiency.

For more than two decades, Stewart Technology Associates (STA) have been dedicated to solving marine technology problems.  Company leader, Bill Stewart has made the development of riser analysis a priority, and is the author of numerous technical papers on the subject, as well as, playing an instrumental role at industry conferences dedicated to educating others about the importance of detailed technology solutions.  They are recognized as experts in the field by other experts.

From riser analysis to seakeeping analysis, Stewart Technology Associates utilize the latest in technology to arrive at an offshore solution for your technology problems.  Additionally, the application of industry-wide, best-practice standards ensures that you can always be certain of your equipment’s performance even in an uncertain marine environment.

These stellar results are achieved, in part, through the reliance on the industry’s leading software package, Orcina’s OrcaFlex marine technology software.  OrcaFlex allows for the careful consideration of critical issues like riser analysis, and is the favored marine software package of over 170 organizations worldwide.

With this technology in harness, Stewart Technology Associates’ design and analysis team can bring quantifiable data to the table for analysis.  Additionally, their vast library of over 2,000 technical volumes means that the answers to client’s questions are nearly instantaneous.  They leave nothing to chance when it comes to properly assessing your equipment and procedural effectiveness.

No matter what the industry, knowledge is power, and STA’s project technology experts are sharing that knowledge every day all over the world.  If you are operating in the challenging arena of offshore drilling platforms, you may well be surprised by the myriad of solutions they have to offer for problems, which you may not even have known existed.

Stewart Technology Associates have consulted on projects for some of the largest drilling operations in the world and are trusted throughout the industry.  As experts in the field of riser analysis, they are constantly honing their skills, so that clients, and their employees, benefit from Stewart Technology Associates’ rigorous research and design efforts.

Industry leaders in the field of offshore structures and their operating environment, the professional team at Stewart Technology Associates deliver their expertise in research and design to the solution table with innovative ideas, models, and technology software.  Contact them today so they can help your team arrive at a safer and more productive tomorrow.

Stewart Technologies Offers Varied Rigid and Flexible Risers Solutions

[Posted on June 19th, 2013 by Bill Stewart]

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With deep sea drilling for oil and gas continuing to grow, flexible risers continue to be a needed link between the subsea station and platform. They are the pipeline that transports the gas and oil from the ocean floor to the platform or oil rig for packaging or transport. The oil and gas is pumped up through the risers to the platform or boat where it is transported to be used by businesses.

Risers are often insulated to withstand the extreme temperatures of the ocean floor. They are made to be either rigid or flexible depending on their use. Steel cantanery risers are designed on the principle used to build bridges. They connect the well drilled on the sea floor to the production area. Often they are used to connect two floating oil or gas production platforms too. This curved riser can withstand some motions but too much can cause problems.

These risers are made of flexible steel pipes that are made for deep water drilling.They are often hundred of meters long going far beneath the ocean. They are very reliable and hold up under extreme temperatures and conditions. They are used most often in oil and gas drilling due to costs and dependability of the material.

Top tension risers often end below the facility. These risers are anchored to the area but can move with wind and waves. The risers attachment to the sea floor often causes vertical displacement between the riser top and its connection to the facility. Two solutions are to add a motion compensator or buoyancy cans that helps the movement of the riser remain more flexible.

Designed for deep water environments riser towers are made of steel. They often reach to the surface. These towers have large buoyancy tanks attached to them. The risers are oten located inside the steel towers. The tanks keep the risers in position. Flexible risers are often connected to the vertical risers and the facility to make them work effectively.

Flexible risers can withstand vertical and horizontal movement making them perfect for floating stations. This flexible pipe has been used to connect production equipment on a floating site to production and export risers. They are now used as a primary riser solution. They offer a number of flexible configurations that work with different deep water drilling stations. Two are the steep S and lazy S that utilize buoyancy modules.

Without rigid and flexible riser gas and oil would not be able to be pumped to the surface for use as fuel for our homes, businesses and cars. Stewart Technologies uses risers that are designed to protect the environment and withstand extreme conditions in the deep sea. They will help you find the right solution for your deep sea drilling project and help you with seakeeping analysis.

Expertise in Anchor Analysis and Mooring Solutions

[Posted on June 18th, 2013 by Bill Stewart]

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Off shore drilling rigs, research facilities and laboratories, and other offshore stations of various types have one major issue in common—they all need accurate and professional anchor analysis. The proper mooring applications of these facilities are not only paramount to the daily work conditions of these structures, but also to the protection of the immense investment put forth in these edifices.

Hydrodynamics are an essential priority in the implantation and successful operations of offshore facilities of all types. No other technology Consultant firm has the experience and technological equivalency of Stewart Technology Associates (STA) in terms of analytical software development and hardware implementation technologies.

STA works tirelessly to research and develop expertise in all the ranges and geographic locations of structures (rather than developing a niche` in the field) which need solid proficiency in anchor analysis or Seakeeping Analysis alternatives in all the offshore industries.

One of the more obvious problems with sea faring missions which use structures designed to remain at sea long-term or stationary, are the often dangerous and unpredictable conditions of nature on the high seas. These are some of the problems companies face when seeking funding, licensing, and permits for off-shore ventures of all types. The past stories of horrendous oil spills and other disasters which befall stationary structures on the ocean have helped to create further opposition to their construction, launch, and their very existence. Companies need expertise in the area of safety and high quality anchor analysis to ensure everything possible is done to prevent such accidents.

Stewart Technology Associates has developed a comprehensive software system that envelopes the entire construct of the industry and its needs from start to finish. Here are a few of the main focuses of their programs:

·         Design sea state analysis

·         Static and dynamic mooring systems analysis

·         Wave scatter dynamics

·         Slamming analysis

·         Analysis of multiple interacting structures

·         Hull girder loads and drift analysis

·         Spill containment and oil spill cleanup procedures

These are some of the top concerns and questions that arise when companies begin to plan and assess the tasks of maintaining sea structures and their anchor analysis or mooring solutions.

Finding a company that is complete in its services and comprehensive in its solution is important to offshore developers, research projects, and other offshore marine activities. STA consultants also offer assistance in emergency solutions as well. At Stewart Technology Associates our scope is broad in nature which guarantees our clients will find the solutions they seek to protect and manage their offshore projects and assets. Before you begin the daunting tasks of compiling information about an offshore venture contact STA for expert anchor analysis and mooring solutions to ensure your company and its investments are on the cutting edge of industry standards and the technologies available.

Stewart Technology Associates Consider Cable Dynamics In Their Technology Analysis

[Posted on June 12th, 2013 by Bill Stewart]

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Marine and offshore risers and other structures require special cable dynamics to ensure the safe operation of structures out in open water. Stewart Technology Associates takes into account these structures and the issues cables experience as they come up with unique mooring solutions for companies in the gas and oil industry.

Cables are placed on floating and submerged structures to keep them steady so that company operations can proceed with the extraction and processing of resources can proceed. They may also be used for communications and power operations. Structures such as jack-ups and risers are actually situated on a movable surfaces, as the ocean tides, waves and currents constantly affect the stability of the structure and all equipment running from that structure into the watery depths. Seakeeping analysis must be performed to address the type of pressure and stress the cables will experience during calm seas as well as turbulent ocean waves caused from destructive storms to ensure the structures will not collapse or cause injuries to workers on floating platforms.

In addition, catenary mooring cables are analyzed in relation to the drag and seabed friction to prevent failure that can effect marine and offshore structures. By analyzing how the tide and current of the ocean influences the cables used on these structures, companies can ensure they are developing the proper technology solutions to prevent present and future problems.

Stewart Technology Associates uses the most state-of-the-art technology when evaluating cable dynamics for oil and gas industries to develop diagrams and plans for floating and submerged structures. This consultant organization utilizes  OrcaFlex software, one of the premier dynamic analysis software applications available that is used by over 170 organizations around the world. This software helps Stewart Technology Associates create technology diagrams and computer animations in regards to the correct placement of cable whether it is power cables, communication cables or cables used for mooring purposes.

Don’t begin building marine and offshore structures without the proper cable dynamics solutions offered by Stewart Technology Associates. Ensure your technology team has considered all the possibilities regarding the use of cable on your structures by getting these comprehensive consultant services. Stewart Technology Associates will take all factors into consideration regarding the amount and length of cable used, the geographical location of the structure and the unique influences of ocean patterns that can affect structures placed in that area.

Design and build safe and sound structures to prevent costly accidents and injuries by getting cable dynamics expertise from the consulting experts. Whether the structure is large of small, Stewart Technology Associates can give you the solutions for your marine and offshore operations by providing the answers you need for the correct placement of cable. By obtaining these technology solutions, you can avoid costly accidents and repairs.

Designing Deepwater Steel Catenary Risers for Industrial Maritime Needs

[Posted on June 10th, 2013 by Bill Stewart]

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Used frequently for pipeline work and drilling offshore projects, steel catenary risers allow for offshore pipeline attachments when the critical connection needs to be made to a floating platform from deep below. These pipelines are not small connections, often spanning a foot in diameter. They are also designed to function under extreme water pressure, being able to withstand up to 5,000 psi with tidal ocean pull. The above said, steel catenary risers have not been used for a very long period in maritime history. The first major project was a Shell offshore construction system in 1994, connected to an underwater point 874 meters deep.

Today’s steel catenary risers are now manufactured in different types and assemblies, from a simple steel catenary riser to a steep wave or bottom weighted riser to a buoyant wave or lazy wave riser. The major difference often tends to be the length of the catenary system, the number of buoys attached, and the diameter of the pipeline delivery involved. The variation in manufacturing is also designed in different ways to deal with varying ocean and underwater conditions as well as deep sea pressures and ocean current strengths.

Stewart USA has been in the business of ocean-based structural design and technology since 1986. Founded to provide international technology consultancy, Stewart works with all types of offshore seakeeping analysis and seafaring studies to determine the best approach to unique construction challenges.

Stewart’s advanced technology capability when addressing steel catenary risers needs is also supported by its unique use of OrcaFlex and Orcina software technology. Both programs are specifically designed for complex ocean-based technology modeling and design work. Because of the unique nature of this technology tool, Stewart USA is able to address modeling demands in far greater detail that other consultants may be able to provide. The company can also use the same tools to provide expert analysis on what may have gone wrong or malfunctioned with other work and designs, again being able to model and show what should have worked and why something went awry under an ocean technology scenario. It’s no surprise then that Stewart USA has been used by the likes the U.S. Navy, Coast Guard, major oil companies with offshore projects, legal teams, and maritime insurance companies as well as evaluators.

Whether it be a deepwater design of complex steel catenary risers or an off-land pipeline connector mooring, Stewart USA has the experience and knowledge to design the best approach for a client’s needs. As a result, the company is often called upon for the most challenging design work on new ocean projects.

What a Thorough Seakeeping Analysis Looks For

[Posted on June 6th, 2013 by Bill Stewart]

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As seafaring technology has become increasingly advanced, seakeeping analysis has played an vital role in keeping everything running smoothly, efficiently, and safely on the open ocean. The capacity for this type of analysis has greatly improved over the past several years, and promises to continue to improve, as pressure from regulatory bodies looking for safer vessels combined with passenger demands as well as the technological advances made in the computer world have made it possible. While many may know that it is important for them to use this analysis before launching a new vessel, they may not realize how the analysis is done and the vital role the final results play in the outcome of their project.

What is monitored as a part of the analysis?

Seakeeping analysis is vital for the safety and functionality of seafaring vessels. With so many different characteristics that interact and affect the abilities of the vessel, it is impossible to really say what impact a small change on the design of such a vessel will have on the final outcome unless a complete analysis is completed.

A thorough analysis will typically examine three parts. The first question involves studying they type of environmental conditions that the boat or other vessel is likely to encounter on its voyage. The second step is to then look at the predicted response of the vessel to these conditions. Finally, the third step will specify the types of criteria used throughout the analysis to allow for comparisons between vessels.

Typical situations that are analyzed involve looking at fore and side slamming, sloshing fatigue, mooring, design sea state, statistics surrounding projected performance, and more.

What can the information provided in a seakeeping analysis do?

The information provided by the analysis offers the owners of the vessels many options and a great deal of information. Since the analysis will help in the comparison between vessels, they will be able to determine which option will get the job done the safest and the most efficient. It also offers a great deal of information about how the vessels can be improved to better comply with regulation and passenger or operator demands. A part of the analysis can even examine ways to help ward of motion sickness, which can be very helpful for the comfort of all those on board. It can also be used to successful guide the implementation of >steel catenary risers.

A thorough analysis will help make sure that any vessel preparing to leave is well equipped and prepared for what may lie ahead. At Stewart Technology Associates we are dedicated to using the latest technology and equipment available along with highly trained analysts to provide all our clients with the best information. We pride ourselves on always offering the best that the industry has to offer. We look forward to serving you.

Hydrodynamic Analysis Does Not Need to be a Project Mystery

[Posted on June 5th, 2013 by Bill Stewart]

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Hydrodynamic analysis provides a critical insight into the behavior of water and liquids, which affects both water-borne vessels and related facilities as well as containers that must manage liquid holding as well as liquid flow. Better known as the study of fluid in motion, such analysis provides key input into the design of everything from water locks for traffic channels to how vessel engines perform with their turbines when producing momentum for a boat.

For clients considering major scale projects in dredging, new water channels, vessel production, and harbor redesign, hydrodynamic analysis plays an important role in decision-making as well as resource allocation for the project. As a result, the related reviews need to be on target and utilize the most up-to-date technology information to provide the most helpful information and conclusions.

For instance, many channels can slopes and bottoms that change from location to location. This can significantly influence the flow of tides as well as the vessel traffic above and how it moves accordingly. With a good hydrodynamic analysis, a control agency can see where it has risks as well as reserve channel space to direct traffic to, or where additional work is needed for improved traffic behavior, such as heavy-scale dredging.

Hydrodynamic analysis can also provide key perspectives on what could occur under extreme conditions with new diversions of waterways and channels. This is often an unknown risk when creating new levee systems and artificial water channels going through lower level land areas. When heavy flow such as winter rain and runoffs begin to add load and weight to the waterways, the analysis can show where risks and potential weaknesses exist, representing high-danger potentials to surrounding areas.

The benefits of hydrodynamic analysis also go hand-in-hand with harbor and mooring design. Especially with single point moorings, knowing how underwater forces will work against a mooring can dictate where the placement of the mooring should actually be located for best results. Lift and drag factors can easily impact whether a mooring will perform as expected or will begin to shift over time into a bad location.

Stewart USA has been in the business of providing expert hydrodynamic analysis for the last two decades, being called upon by projects large and small for their detailed, quality analyses. Whether the matter involves expert testimony for litigation purposes or for design support on new construction, Stewart’s work has been relied on repeatedly for critical decisions.

So if your project is facing a marine technology challenge in design or study, Stewart USA can address the matter and focus studies on the data that matters. With the company’s body of skilled technology exprerts and its state-of-the-art technology, hydrodynamic analysis demands will be addressed timely, keeping projects on track to fruition.

 

Single Point Moorings Analyses Help with Waterway Risk Management

[Posted on June 4th,  2013 by Bill Stewart]

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For someone who’s not familiar with the work involved, it’s fairly easy to assume placing a set of single point moorings is just a matter of picking a point close to a dock where the water location won’t impede with entry and exit. For those who actually have to do the work, mooring analysis often involves quite a bit more thinking.

For the uninitiated, single point moorings generally involve offshore, floating buoy-style tieups for vessels large and small. Access to the boat, of course, then depends on smaller skiffs back and forth. The benefit of the single point mooring is that it keeps the boat at anchor without clogging up the traffic in the harbor, especially if the boat is large and will be in same location for a while. This sort of system is often applied in locations with heavy tanker traffic, such as petroleum loading and unloading facilities, for example. In fact, designed in a certain way, a single point mooring could literally do away with the need for dock facilities, especially if the product being loaded or unloaded is liquid-based. All one then needs to do is run sufficient plumbing out to the mooring point for the vessel to connect to.

The design of single point moorings is where things get a bit complicated. In concept, the mooring has a heavy anchor point that sits on the water floor. A chain runs up to one buoy for slack and then to the connecting point station where the boat is actually tied up. There usually needs to be enough distance between the various chain points to account for current shifts and water movement but still keep the boat generally in place. The equipment and design also needs to be tested for strength, torque limits and elemental exposure. All of these factors can easily contribute to the failure of a poorly-designed mooring, which of course means the risk of a suddenly free-floating vessel that is out of control.

It’s important to have the right seakeeping analysis done behind the placement of single point moorings, especially in areas of heavy shipping traffic. With a good mooring analysis, a client can pinpoint the ideal water locations for setup that complements the existing water lanes rather than causes new conflicts. This kind of analysis can also include relationships with other sea structures in the location as well such as towers, submerged buoys, turrets and more.

With the right technology, modeling and expertise applied to the task, a client have a quality analysis performed, highlighting the risk areas and best single point moorings possible for his location and waterway. This kind of analysis work can also tremendously help a client stay in compliance with national water laws and regulations, steering clear of liabilities for potential water lane accidents and related issues.

So if your facility or harbor needs a new approach to mooring design and spec development, consider Stewart USA for the job. The skill and knowledge brought into the project will pay dividends down the road.

Expertise in Anchor Analysis and Mooring Solutions

[Posted on June 3rd, 2013 by Bill Stewart]

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Off shore drilling rigs, research facilities and laboratories, and other offshore stations of various types have one major issue in common—they all need accurate and professional anchor analysis. The proper mooring applications of these facilities are not only paramount to the daily work conditions of these structures, but also to the protection of the immense investment put forth in these edifices.

Hydrodynamics are an essential priority in the implantation and successful operations of offshore facilities of all types. No other Technology Consultant firm has the experience and technological equivalency of Stewart Technology Associates (STA) in terms of analytical software development and hardware implementation technologies.

STA works tirelessly to research and develop expertise in all the ranges and geographic locations of structures (rather than developing a niche` in the field) which need solid proficiency in anchor analysis or Seakeeping Analysis alternatives in all the offshore industries.

One of the more obvious problems with sea faring missions which use structures designed to remain at sea long-term or stationary, are the often dangerous and unpredictable conditions of nature on the high seas. These are some of the problems companies face when seeking funding, licensing, and permits for off-shore ventures of all types. The past stories of horrendous oil spills and other disasters which befall stationary structures on the ocean have helped to create further opposition to their construction, launch, and their very existence. Companies need expertise in the area of safety and high quality anchor analysis to ensure everything possible is done to prevent such accidents.

Stewart Technology Associates has developed a comprehensive software system that envelopes the entire construct of the industry and its needs from start to finish. Here are a few of the main focuses of their programs:

  • Design sea state analysis
  • Static and dynamic mooring systems analysis
  • Wave scatter dynamics
  • Slamming analysis
  • Analysis of multiple interacting structures
  • Hull girder loads and drift analysis
  • Spill containment and oil spill cleanup procedures

These are some of the top concerns and questions that arise when companies begin to plan and assess the tasks of maintaining sea structures and their anchor analysis or mooring solutions.

Finding a company that is complete in its services and comprehensive in its solution is important to offshore developers, research projects, and other offshore marine activities. STA consultants also offer assistance in emergency solutions as well. At Stewart Technology Associates our scope is broad in nature which guarantees our clients will find the solutions they seek to protect and manage their offshore projects and assets. Before you begin the daunting tasks of compiling information about an offshore venture contact STA for expert anchor analysis and mooring solutions to ensure your company and its investments are on the cutting edge of industry standards and the technologies available.

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