Worldwide sealing developer and manufacturer, Busak+Shamban hasovercome the problem of elastomer seal degradation caused by theaggressive chemicals used to inhibit scale and bacteria inwater-based drilling equipment.
The move from oil-based drilling and completion fluids, towater-based media within the offshore industry, has presented newchallenges for sealing.
Water based fluids offer operational, economic and environmentaladvantages, however, used at relatively high temperatures, theypromote the generation of scale and formulation of bacteria withindrilling equipment. To overcome this problem, common practice is todose fluids with a chemical-based inhibitor, which, often beingamine-based, is highly aggressive and degrades conventionalelastomer seals.
At the request of a leading manufacturer of valves for offshoreequipment, Busak+Shamban engineers undertook extensive tests tofind a seal material that would be capable of withstandingaggressive biocides and corrosion inhibitors and remain inert inthis relatively hostile environment. The seals had to operate in100% concentrations at temperatures ranging from -20°C to +60°C (-4°F-140°F). With the possibility of carbon dioxide being present and very highoperating pressures, they also had to exhibit both explosivedecompression resistance (EDR) and extrusion resistance.
Busak+Shamban Isolast® perfluoroelastomer sealing, now beingused to overcome the problem of elastomer seal degradation causedby the aggressive chemicals used to inhibit scale and bacteria inwater-based drilling equipment.
Already with a proven performance in critical processingapplications, tests specific to water-based drilling operationsshowed Isolast® perfluoroelastomer material to offer sealingintegrity, a resistance to amine-based chemicals, the ability towithstand temperature extremes, exhibit EDR and extrusionresistance. Three grades of the material were tested, completing1,200 pressure cycles up to 10,000 psi. Based on these results theseals have been adopted for valve applications in drillingequipment. Busak+Shamban Isolast® perfluoroelastomer seals are nowproviding extended seal life and consequential reduced maintenancecosts and downtime in various offshore drilling applications.