The 3M™ Glass Bubbles HGS7K32 is used for down hole applications for cementing and drilling fluids.
3M™ Glass Bubbles HGS7K32 are hollow glass spheres designed for use in drilling, completion, and workover fluids, as well as cement slurries in the oil and gas industry. With a nominal density of 0.32 g/cc and an isostatic crush strength of 7,000 psi (pounds per square inch), HGS7K32 glass bubbles are well-suited for use in shallow to intermediate depth wells.