HOLO

Chemical for use as a fluid loss additive employed to minimize fluid losses in subterranean formations; chemical agents for use in treatment, servicing, and working of oil wells and gas wells, namely, subterranean formation filling agents, proppants and abrasive agents for subterranean formations

Oil well and gas well downhole survey and measurement equipment, namely, materials for measuring subterranean formations, materials for sensing geometries of propped fractures in subterranean formations, materials for identifying locations of proppants in subterranean formations; tracers; materials for sensing flow back of proppants in subterranean formations and materials capable of indicating changes of proppant placements dynamically over time

Ceramic materials for use in the oil well and gas well industry, namely, ceramic pellets, shots, and spheres for use in oil well and gas well hydraulic fracturing and as gravel pack materials for sand control operations, and for use as strengthening agents for subterranean formations