- Decreases density and increases buoyancy to help improve efficiency and may lower material costs
- Provides excellent water and oil resistance for use in underwater applications
- Stable voids for low thermal conductivity and reduced dielectric constant
- Versatile use – adaptable to a variety of production processes
- Low density, chemically stable bubbles are ideal additives for buoyancy applications
3M™ Glass Bubbles K25 glass bubbles have a density of 0.25 g/cc and an isostatic crush strength of 750 psi. These general purpose spheres have a good strength-to-density ratio and are designed for use in a variety of intermediate depth (e.g up to 5,000 feet of sea water) buoyancy applications, such as drill riser buoyancy modules.
Buoyancy Benefits and Applications
Higher filler loading
The ideal combination of high strength and low density has made 3M glass bubbles an industry-standard additive for syntactic foams used in buoyancy modules, buoys or buoyancy blocks for undersea vehicles. When 3M glass bubbles are formulated with resin, the resulting syntactic foam has a high strength-to-density ratio to provide maximum net buoyancy for a given depth rating. The bubbles also produce stable voids, which results in low thermal conductivity and low dielectric constant.
Drill Riser Buoyancy Modules
3M glass bubbles K25 can be used in a variety of applications. One common application is in drill riser buoyancy modules. Drill riser buoyancy modules are large clamp-on structures that are used on steel risers for all offshore oil and gas drilling. The drill riser is used to offset the weight in water of the riser and all of its associated components. The deep riser buoyancy modules remain stable in high pressure deep water. 3M glass bubbles K25 help to decrease weight of the whole composite structure, allowing it to remain strong, buoyant and lightweight.
Learn more about 3M™ Glass Bubbles for Drilling
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