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EXPLORATION • DRILLING • FIELD SERVICES


New compliant clamp technology A


dvanced Insulation has launched a new range of distributed buoyancy modules (DBMs)


featuring the company’s latest integrated clamping technology. DBMs are designed to reduce


tension and load strain on subsea risers and umbilicals, which act as a connecting interface between static structures on the seabed and dynamic floating structures on the surface. Insulated or multi-layered subsea risers have softer outer surfaces, so traditional clamping methods that use stiff/rigid materials cannot grip without slippage or, through the use of higher clamping forces, damage the riser itself. Advanced Insulation’s new range of


DBMs feature an innovative clamping technology that is designed to adapt to the specific needs and conditions of a riser’s operation and eliminate slippage throughout its operational lifespan. The new internal clamping mechanism consists of three segments housing nine rubber inserts, which innovatively increase the surface contact area at the interface between the riser and


the DBM. Vertical bar retainer rubbers then ensure that there is no drop off while the holding bolts are engaged, which also secures the clamp element orientation and ensures that the clamp cannot misalign around the riser body. This innovative clamping interface allows Advanced Insulation’s new DBMs to be deployed where traditional solutions would often fail and also results in a smaller, more efficient clamping solution.


deliver significant gains in speed and reliability for the installer.” He explains that fastener cover clips


protect fixings and prohibit the growth of damaging marine life, prolonging the module’s working life. Filled with specific grades of syntactic foam, cylindrical buoyancy or ballast modules fit around the clamp and are secured using heavy-duty Kevlar straps. Various foam densities are employed in order to achieve a specific buoyant ‘upthrust’ that is suitable to survive the required operational water depth and field service life. The ability of this system to be


Guy Downie from Advanced


Insulation states: “Rate of installation has been a major factor in the design of this DBM system, which promises to


connected in a modular configuration allows for single, double and triple solutions based on a proven reliable standard. Each Advanced Insulation distributed buoyancy module is designed specifically to suit a customer’s requirements and features a robust, highly durable exterior design that is low maintenance and easily installed. l


For more information visit www.aisplc.com


Alternators deployed for complex onshore project A


continuous power requirement in Colombia’s oil sector is being met by a range of advanced


alternators. Specialist generator set manufacturer IGSA from Mexico specified the premium alternators from Cummins Generator Technologies, which were coupled with Cummins engines to make a 2.5MW generator set design that meets the highest quality standards in a demanding application. IGSA supplied the two generator


sets through its local distributor Antonio Spath Co. to one of the largest oil & gas multinational companies operating in Colombia. The company is a leading explorer and producer of natural gas and crude oil, with


22 www.engineerlive.com


operations focused in Latin America. The complete system is an


arrangement of four generator sets that deliver 9MW of continuous power to a crude oil extraction site. The final customer required IGSA to deliver a generator set design that would produce 2.5MW of standby power. For alternator supply, IGSA


chose to team up with Cummins Generator Technologies, as it has done frequently before. The alternators specified were low voltage variants of the Stamford P80 range. Cummins Generator Technologies supplied two of these, fitted with anti-


condensation heaters, plus droop current transformers, to support parallel operation. The alternators were paired with Cummins G-Drive QSK78 G7 engines. l


For more information visit www.stamford-avk.com


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