Global Leader in Deepwater Buoyancy Technology

Drilling Riser Buoyancy Modules Flowlines, Flexible Risers, Umbilicals, and Jumpers

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For more than 30 years, Flotation Technologies has provided deepwater deployment solutions to the greater subsea market and has remained committed to providing only the highest quality solutions to the offshore oil and gas, oceanographic, and military markets.

Cuming Corporation is a preeminent supplier of a wide range of syntactic foam products for the offshore oil and gas marketplace. The company pioneered the use of syntactic riser buoyancy modules in 1968, making today’s ultra-deep drilling possible, and followed that innovation with a wide range of materials to facilitate production of hydrocarbons from the sea.

With the variety of materials and manufacturing methods developed over the years in the two AFGlobal Subsea Buoyancy Group facilities, you can benefit from the best selection of products and materials in the market.

The consolidation of two of the industry’s leading pioneers, Cuming Corporation and Flotation Technologies, Cuming Corporation offers the most advanced technology and the most robust infrastructure in the field to deliver top-of-the-line products on time and within budget.

• Syntactic Foam• Polyurethane Elastomer• Rubbers and Plastics

• Standard and Specialty Metals• Carbon Fiber and Specialty

Glass Fiber

Global Leaders in Deepwater Buoyancy TechnologyCuming Corporation and Flotation Technologies have joined together to form the AFGlobal Subsea Buoyancy Group, one of the largest manufacturers of subsea buoyancy and pipeline insulation products in the world. The AFGlobal Subsea Buoyancy Group works with a full line of specialty composite materials, including:

Depth LeadersThe first to supply buoyancy modules for 12,000-foot service, Cuming holds all current drilling depth records and is ready to go to 14,000 feet today, thanks to our unmatched production and testing facilities.

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Custom Design and ManufacturingCuming Corporation offers comprehensive, innovative design solutions for buoyancy and polyurethane elastomer systems, customized around instrumentation, equipment, and end-user capabilities. From buoyancy to clamping and wear issues, we have the capability to handle any problem, simple to complex, single-piece to modular design.

Cuming Corporation’s engineers take customer requests and create turnkey, tailored products.

We have the ability to:

• Build to print• Design to your specifications• Manufacture directly from CAD files• Take delivery of customer-supplied tooling

and structures for factory installation

Finding the right buoyancy product for your application and determining the most cost-effective approach is no easy task. Our experienced sales staff and engineers will work with you to suggest a standard product or provide a timely quote for a custom solution.

Flowlines, Flexible Risers, Umbilicals, and JumpersAs the search for oil and gas goes into deeper waters, new technologies are required to produce these new fields. These new technologies include Hybrid Riser Towers (HRT), Turret Buoys, Flexible Risers, Steel Catenary Risers (SCR), Umbilicals, Jumpers, and more. Each of these new technologies requires some form of high-performance syntactic foam buoyancy to perform efficiently. Cuming Corporation uses the same materials for these new applications as we have for more than 30 years, and we have the experience and engineering resources to design and build unique buoyancy products for these new applications.

• Distributed Buoyancy Modules by Flotation Technologies

• Buckle Mitigation Buoyancy Modules by Flotation Technologies

• Deepwater Buoys

Visit afglobalcorp.com for more information.

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C-FLOAT Drilling Riser Buoyancy Modules are designed to be easy to lift, store, and handle, and they work in concert with other rig equipment. Integrally molded flexure lugs inside the modules isolate bending to avoid damage to the riser or buoyancy module. Built-in lift points mean safe, quick handling, while smooth outer contours with recessed hardware minimize the chance of hang-up. Unique self-shoring features prevent modules from rolling on the rig deck and allow safe stacking.

Construction OptionsC-FLOAT Drilling Riser Buoyancy Modules are built to take the daily wear and tear of shipboard storage and handling. All standard-FLOAT modules include our proprietary High Integrity “HT” construction with internal reinforcement for extra safety, even if the module is damaged. Additional strength, impact resistance, and longevity can be provided by ruggedized “RGD” options that incorporate aramid and/or metal reinforcements engineered into the module structure.

Attachment MethodsC-FLOAT Drilling Riser Buoyancy Modules may be attached to the riser in any one of several methods. Simple straps around the outer diameter are tightened by tensioners fitted into molded pockets. Internal bolted fasteners can be used to secure the modules to the riser. Aramid is normally recommended for straps, while type 316 stainless steel is usually the choice for the fastening hardware.

Hardware and AccessoriesCuming Corporation supplies a complete line of hardware and accessories for C-FLOAT Drilling Riser Buoyancy Modules. Stop collars, also called thrust collars, are normally required at both ends of each riser joint to prevent slippage and movement. Riser guards may be desirable to avoid damage to bare riser joints. Fairings and other VIV reduction devices are often required in high current areas.

C-FLOAT Drilling Riser GuardC-FLOAT Drilling Riser Guards make possible the safe and easy handling of “slick joints” (riser joints not equipped with buoyancy modules) onboard a drilling rig at sea. Strong, lightweight accessories that do not add or subtract buoyancy to or from the drill string, riser guards are designed to stack securely and prevent joints from shifting or rolling during storage and handling. Riser guards protect the riser choke and kill and auxiliary lines against damage while running or retrieving the riser, and they provide sturdy lift points for MUX cable clamps and other accessories. Designed with dimensions that match standard C-FLOAT buoyancy modules, riser guards are carefully vented and ported to ensure proper operation of dump valves, telescopic joints, and other special purpose parts of the riser string.

Drilling Riser Buoyancy Modules with C-FLOAT Technology

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C-FLOAT Products

C-fLoaT sDfStandard Density Syntactic Foam

This epoxy/glass composite material has become the standard for the industry. Developed and refined over the last 30 years, C-FLOAT SDF continues to provide the best in versatile and cost-effective riser buoyancy.

C-fLoaT LDfLow-Density Syntactic Foam

This option combines all of the best features of proven standard construction with reduced density, providing more buoyancy in a smaller package. The result is a significant boost in efficiency with the reliability of conventional materials.

C-fLoaT ULfUltra-Low Density Syntactic Foam

When conditions demand the lowest possible density for the greatest depth, this material offers the highest performance buoyancy available. Special processing and advanced aerospace-grade materials combine to offer high strength and low weight.

C-FLOAT ApplicationsproDUCT pUrpose

Drilling Riser Buoyancy Modules and Riser Guards

Support drilling and production risers down to 14,000 feet

Hybrid Riser Tower Buoyancy Modules

Support production risers at all depths down to 14,000 feet

Distributed Riser Buoyancy Modules Provide buoyancy to flexible risers, hoses, and pipes in deep water

Turret Buoyancy Modules Provide buoyancy to turret mooring systems

Mooring Buoys Provide buoyancy for permanent mooring lines

Installation Buoys Provide temporary buoyancy during installation of subsea equipment

Special Purpose Buoys Provide buoyancy for special subsea requirements

Hybrid Riser Tower Buoyancy Modules

Support production risers at all depths down to 14,000 feet

Epoxy syntactic foam is the basic constituent of C-FLOAT. It is a rigid epoxy plastic filled with tiny (100–200 microns in diameter), hollow borosilicate glass microspheres. The components are mixed under a vacuum, injected under vacuum into the mold, and then cured under a combination of high temperature and pressure to form a lightweight solid. When this syntactic foam is used as an infill matrix around macrospheres (described below), the resulting tightly bonded composite is a “three-dimensional honeycomb” structure with very high strength.

Fiberglass macrospheres help lower the density of the composite system and increase buoyancy per unit volume. The macrospheres are thin-walled, hollow epoxy/fiberglass composite spheres, approximately 6 mm (1/4") in diameter.

Syntactic foam is inherently impact-resistant and damage-tolerant. C-FLOAT syntactic foam products are constructed with a tough integrally molded fiberglass composite skin. The result is a rugged line of buoyancy systems that function effectively even when damaged or abused.

Available Constructions

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Distributed Buoyancy Modules by Flotation TechnologiesDistributed Buoyancy Modules are a critical component of deepwater production systems and are used to maintain a pre-defined riser configuration such as a lazy, steep, or pliant wave in flexible risers, umbilicals, and SCRs. These configurations allow the vessel a full range of surface movement without putting undue stress on the subsea lines and to decouple wave action from the seabed. Made up of two major components, the internal clamp and the buoyancy element, distributed buoyancy modules are engineered and manufactured by Cuming Corporation to meet the stringent requirements of long-term service while minimizing installation time.

The internal clamp is the most important and complex component of the module. It securely attaches the exterior buoyancy module to the riser, resisting axial movement throughout all design conditions. It also transfers the buoyancy load to the riser. These conditions include loads from various sources as well

as expansion and contraction of the riser during service which may last up to 30 years. The clamp is specifically designed to meet these stringent criteria. The internal clamp body is made of high-density syntactic foam that is extremely resistant to creep and provides additional buoyancy to the module. All metallic components are made from super duplex stainless steel, providing superior corrosion resistance and high strength.

The exterior buoyancy element provides uplift for the riser system. Each half-shell is designed with an internal recess to engage the composite clamp. A tapered opening at the ends of the element allows local bending of the riser without contact with the element.

Buckle Mitigation Buoyancy Modules by Flotation TechnologiesAt higher temperatures and pressures, a pipeline’s natural tendency is to relieve axial stress by buckling. Left uncontrolled, this buckling can have serious consequences for the integrity of the pipeline. To control the formation of lateral buckles along the pipeline and alleviate stress on those buckles, we have designed the Buckle Mitigation Buoyancy Module, a cost-effective and efficient solution that uses buoyancy to decrease lateral friction and reduce the severity of buckle bending.

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Deepwater BuoysCuming Corporation manufactures deepwater buoys of every size and shape and for every application. Very large buoys are made up of syntactic foam elements that are molded and tested at our factory prior to assembly. We can test elements to a service depth of 14,000 feet, and with proper design, 30 years of service life is possible. We also supply all hardware (CRA or coated steel) for buoys, including thru members, shackles, banding, fasteners, etc.

Quality Assurance

Photo courtesy of NOAA

Cuming Corporation’s philosophy centers on continuous improvement and investment in people and processes to provide customers with lasting quality and value. Our state-of-the-art manufacturing facility is equipped with complete testing facilities, including hydrostatic testing chambers, buoyancy test pool, materials laboratory, and physical testing facilities.

Cuming Corporation’s Quality Assurance System is registered to ISO 9001:2008 and covers the design, manufacture, and sale of buoyancy and polyurethane elastomer products. We conform to API 16F and

other recognized industry standards as well as ABS, ASME, DNV, BV, and similar inspection and verification agencies. We operate the largest and deepest hydrostatic pressure test vessels in the industry, rated to 6,500 psi, or over 14,500 feet, for full-size testing. Our products and materials equal or exceed all rating standards for ultradeep marine service.

Cuming Corporation holds several United States patents on thermal insulation, syntactic foam, and riser buoyancy modules, and many more are pending.

The Industry’s Most Extensive TestingCuming Corporation houses the largest and most modern testing facility in the industry. We measure behavior of full-size riser modules in our hydrostatic test chambers, enabling us to predict performance at full service depths for up to 30 years.

Visit afglobalcorp.com for more information.

Cuming Corporation225 Bodwell StreetAvon, MA 02322 USA800-432-6464 (USA only)

afglobalcorp.com

© 2014 afGlobal Corporation. all rights reserved.

Avon, Massachusetts Our headquarters in Avon, Massachusetts, focuses on production of C-FLOAT syntactic foam flotation—riser modules, buoys, and other large flotation devices. In recent years, we have doubled our factory floor space and more than doubled our production capacity for these product lines. This $8.5 million upgrade has resulted in more than 105,000 square feet for syntactic foam operations. Not only do we have state-of-the-art production equipment, but we also have the most sophisticated hydrostatic testing facility in the United States.