Chemicals used in a specialized metal silicate drilling fluid for oil and gas well drilling, milling and completion operations

Oil and gas well equipment, namely, non-metal drill pipe protector made of multilayer carbon fibers, ceramic compounds and aramid synthetic fibers for use with drill pipes for use in well boring

Molding of plastic materials

Drilling heads being parts of machines; drilling bits being parts of machines; drilling machines; mine borers; stretch-draw equipment for prestressing force anchors; digging machines; mineworking machines; extractors for mines; ore treating machines