Oil and gas well equipment for completion operations, namely, fracturing plugs composed of dissolvable metal, and being void of rubber; Equipment for oil and gas well completions not being parts of machines, namely, plugging tools in the nature of bridge and fracturing plugs primarily made of magnesium, which are used to isolate one wellbore section from another wellbore section during hydraulic fracturing operations; Oil and gas well downhole tools, namely, frac plugs made up of dissolvable ...