VISTA

Oil and gas well downhole equipment, completion tools and parts therefor for use in controlling the flow and movement of fluids and especially adapted for use with hydraulic fracturing machines, namely, frac balls, wireline retrievable ball seats, frac plugs, frac darts, frac sleeves, packers for use in controlling the flow and movement of fluids, sliding sleeves being parts of machines, and frac ball valves, all for use in oil, gas, condensate and water wells