This is the working library for borewell and DTH drilling air: what the compressor must deliver, how the air travels down the string, how the hole is cleaned, and how the well is finished and tested. Use it as a map. Each page covers one decision.
The principle running through all of it: the rig reaches the formation, and the air system decides whether the hammer works and the cuttings leave the hole. Pressure runs the hammer; flow cleans the hole; losses in the string, hoses and water inflow decide how much of both reaches the bit.
Start here: duty, selection and sizing
- Borewell Compressors, Parts & Lifecycle Support
- Water-Well Drilling Compressors
- DTH Drilling Compressors
- DTH Compressor Selection
- DTH Hammer Air Requirement
- Bore Diameter vs Air Requirement
- Annular Velocity
- Drilling Depth and Compressor Selection
- DTH Compressor Sizing and Duty Confirmation
- Deep Hole Drilling Air Planning
- Booster Assisted Drilling Air
- High Pressure Borewell Air
- DTH Hammer and Bit Selection
- Drill String and Air Path Review
- Air Hoses and Rig Connections
- DTH Lubrication and Air Treatment Interfaces
- Groundwater Effects On Drilling Air
- Cuttings Transport and Borehole Cleaning
- Wet Hole Drilling and Water Ingress
- Casing and Unstable Formation Planning
- Final Bore Diameter and Pump Passage
- Borewell Compressor Performance Diagnostics
- Drilling Productivity and Cost Per Metre
- Drilling Air Mobilisation and Site Acceptance
- Tractor and PTO Driven Compressors
- Well Completion Cleaning and Development
- Borewell Yield Testing and Production Duty
- Operating Rate Decisions and Revision Triggers
- Derating Rate Restoration and Groundwater Baselines
- Production and Availability Forecasting
- Forecast Variance and Production Control
- New Borewell Compressor Sales
- Borewell Compressor Rentals and Hire
- Borewell Compressor Spare Parts
- Borewell Compressor Service and Repairs
- Compressor Overhauling and Refurbishment
- Used and Reconditioned Borewell Compressors
- Borewell Project Enquiry Brief
- Complete Borewell and DTH Engineering Centre
- The borewell rig as an integrated system
- Groundwater, geology and drilling method selection
- Borewell rig reliability and drilling records
- Portable compressed-air engineering
Air path, hammer and drill string
Hole cleaning, water and ground
Drilling performance and site readiness
Completion, testing and production
Buy, hire, parts and service
Related
Watch
A short explainer on this topic
Slide-by-slide engineering explainers from Reddy Compressors. More in the video library.
How to start an enquiry
Send the rig and hammer details, bore diameter and target depth, formation and any water inflow, the compressor you have or need, and whether you want to buy, hire, repair or overhaul. Mark unknown items as unknown. Use one project reference so drawings, quotations and service records stay together. Availability, duty, price, delivery and warranty are confirmed for each assignment.
Independent checks remain necessary for hammer and compressor duty, booster packages, tractor and PTO combinations, hose and string suitability, casing and well design, pumping-test interpretation and local groundwater permissions.