Downhole Tools Market Size, Share & Industry Analysis, By Tool Type (Drilling Tools, Pressure & Flow Control Tools, Handling Tools, Impurity Control Tools, and Others), By Application (Well Drilling, Well Completion, Well Intervention, Well Production, Formation & Evaluation), By Location (Onshore and Offshore {Shallow Water, Deepwater and Ultra-Deepwater}) and Regional Forecasts, 2020-2027.