Global Completion Equipment Market By Type (Casings , Cementing Materials & Equipment , Perforating Guns , Gravel Packing , and Wellheads), By Application (Hydrofracking , Horizontal Drilling , Gravel Packing , and Tight and Unconventional Reservoirs Installation ), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029