Why a good brief matters
Most delays in borewell compressor enquiries come from missing basics. A message that says “need 1,000 cfm compressor” leaves the important questions open: at what pressure, for which hammer, how deep, for how long, and delivered where? Each missing answer costs a phone call, and on a drilling job a lost day is lost money for the rig owner.
A clear brief does three things. It lets us match the compressor to the hammer and depth rather than to a round number. It lets us price the job properly, including transport, hoses and site support. And it avoids the most common mistake in the trade: buying or hiring a machine with enough cfm but not enough pressure for deep, wet holes.
Step 1: tell us what you need
Start with the type of requirement. Each one needs slightly different information.
| Requirement | Typical situation | Most important details |
|---|---|---|
| New compressor purchase | New rig, fleet expansion or long-term project | Hammer size, depth range, pressure, mounting (truck or towed), budget timing |
| Used or reconditioned compressor | Lower capital cost, quicker delivery | Duty, preferred brands, inspection and test expectations |
| Hire or rental | Short project, peak season, a deeper hole than your own machine can handle, or breakdown cover | Start date, duration, site location, operator needs, hours per day |
| Service or repair | Machine down, low pressure, overheating, oil carry-over | Symptoms, alarm messages, running hours, where the machine is |
| Overhaul | High-hours airend or engine, planned off-season work | Running hours, history, available downtime window |
| Spare parts | Filters, separators, valves, hoses, airend parts | Make, model, serial, nameplate photo, part number or old part photo |
Step 2: describe the drilling job
The compressor is sized from the drilling job, not the other way round. These are the details that decide flow and pressure.
| Field | What to send | Why we need it |
|---|---|---|
| Hole diameter | Bit size, for example 6½ inch or 8 inch; overburden size if different | Bigger holes need more air to carry cuttings up the annulus |
| Target depth | Typical and maximum depth, in feet or metres | Depth and water above the hammer add back-pressure |
| Hammer | Make and size of the DTH hammer and its rated pressure | The hammer sets the pressure and air consumption |
| Drill rods | Rod outside diameter and length | Rod size changes annular velocity and pressure drop |
| Geology | Hard rock, weathered zone, boulders, clay, known formations in the area | Affects penetration rate and cleaning needs |
| Water conditions | Expected water strikes and standing water level, measured or estimated | Water above the hammer is the main reason deep holes need high pressure |
| Rig | Rig make, carrier, whether compressor is truck-mounted or towed | Mounting, drive and space constraints |
| Current air set-up | Existing compressor, booster, hoses and lubricator | Tells us whether the problem is capacity or the air path |
If you do not know a value, write “not known” rather than guessing. A wrong figure leads to a wrong recommendation; a gap we can work around.
How these details translate into a compressor
As a guide, the working bands we use for borewell and DTH compressors are:
| Pressure | Typical flow | Typical use |
|---|---|---|
| 200–250 psig (13.8–17.2 bar) | 600–900 cfm | Shallower holes, smaller hammers, drier ground |
| 250–300 psig (17.2–20.7 bar) | 800–1,200 cfm | Common agricultural and project borewells |
| 300–400 psig (20.7–27.6 bar) | 1,000–1,500 cfm | Deep holes, high water heads, larger diameters |
| Up to about 500 psig (34.5 bar) | Special high-pressure units | Very deep or heavily water-bearing holes |
The right point within a band depends on your hammer, rods and water level. Our guide to drilling depth and compressor selection explains the method in detail.
Step 3: site and commercial details
- Location: district, nearest town and village, and any access limits for a truck or towed compressor.
- Site conditions: expected ambient temperature (summer peaks of 45 °C and above are normal in parts of Telangana and Andhra Pradesh), dust and altitude if unusual.
- Dates: required start date and how firm it is.
- Duration and hours: number of holes or days, and hours per day or shift pattern.
- Scope: whether you need transport, hoses, operator, fuel arrangement or on-site service.
- Contact: the person on site who can answer technical questions, and the person who approves orders.
Please do not send passwords, bank details or unrelated personal documents with an equipment enquiry. We will ask for commercial documents only when they are needed for an order.
Step 4: extra details for a machine you already own
For service, repair, overhaul or parts, the machine itself is the best source of information.
- Nameplate photo of the compressor and, for diesel units, the engine.
- Make, model and serial number; year of manufacture if known.
- Running hours from the hour meter.
- Symptoms: low pressure, overheating, oil in the air, unloading problems, unusual noise, smoke.
- Gauge readings: discharge pressure, discharge temperature, engine oil pressure and coolant temperature when the fault occurs.
- Recent service history: last oil and filter change, separator change, any repairs.
- For parts: part number if visible, a clear photo of the old part and the quantity.
We identify spare parts from the machine itself, using the make, model, serial number, nameplate and old part, and confirm fit before quoting.
A ready-to-copy enquiry template
You can paste this into WhatsApp or email and fill in what you know.
| Item | Your answer |
|---|---|
| Requirement (buy new / buy used / hire / service / overhaul / parts) | |
| Hole diameter and target depth | |
| Hammer make, size and rated pressure | |
| Expected water level and water strikes | |
| Rig make and mounting (truck or towed compressor) | |
| Site location (district, town, village) | |
| Start date and duration | |
| Hours per day, operator required (yes / no) | |
| Existing machine: make, model, serial, hours | |
| Fault symptoms and gauge readings | |
| Contact name and phone number |
What happens after you send the brief
- We review the duty. An engineer checks whether flow and pressure suit the hammer, depth and water conditions you have described.
- We ask only what is missing. If a key detail is unclear, we ask for that one item rather than starting again.
- We propose a route. That could be a new or used machine, a hire unit from our fleet, a service visit or a parts quote.
- We confirm scope. Transport, hoses, operator, servicing interval and responsibilities are agreed in writing.
- We follow through. Delivery, commissioning or the repair visit is planned with your site contact.
Common briefing mistakes to avoid
- Asking for cfm without pressure. A 1,000 cfm compressor at 150 psig and one at 350 psig are very different machines.
- Quoting depth without water level. A dry 200 m hole and a 200 m hole with water from 30 m need different pressures.
- Ignoring the hammer rating. Running a hammer far below its rated pressure slows penetration; far above it shortens hammer life.
- Forgetting hoses and fittings. High-pressure hoses, clamps and whip checks must match the compressor.
- Leaving out site access. A remote site with poor roads changes how the machine is moved.
How Reddy Compressors helps
For borewell rig owners we supply all types, all brands and all models of borewell compressors: new sales, used and refurbished machines, rentals, service and spare parts.
Reddy Compressors has served industry since 2002 from Tarnaka, Secunderabad. We are an independent multi-brand specialist: we sell, hire and service borewell and DTH compressors of ELGi, Atlas Copco, Ingersoll Rand, KAESER, Chicago Pneumatic and other makes, without being an authorised dealer of any one brand.
- New borewell compressor sales, including brand-new machines supplied to site for long-term projects.
- Used and reconditioned machines for rig owners who need a lower capital cost.
- Hire from our own fleet of diesel and high-pressure compressors, with rentals from 50 to 2,000 cfm and 2 to 30 bar.
- Service, repair and overhaul by more than 20 service engineers and technicians, covering the whole of Telangana and Andhra Pradesh.
- Spare parts supplied across India, identified from the machine and checked for fit before we quote.
Call +91 99590 60718 or +91 92468 88812, WhatsApp +91 99590 60718, or email reddycompressors@gmail.com. Our office is at Srinilayam, 12-13-200, First Floor, Street No. 1, Tarnaka, Secunderabad 500017.
What to send us
- Requirement type: buy, hire, service, overhaul or parts
- Hole diameter, target depth, hammer size and expected water level
- Site location, start date and duration
- For your own machine: make, model, serial number, running hours and nameplate photo
- Symptoms and gauge readings for any fault
Frequently asked questions
What information do I need to hire a borewell compressor?
Send the hole diameter, target depth, hammer size and rated pressure, expected water level, site location, start date, duration and hours per day. Say whether you need hoses, an operator or transport. With these details we can suggest the right pressure and flow band and plan delivery, instead of guessing from a single cfm figure.
How do I know what cfm and pressure my borewell compressor needs?
Flow depends mainly on the hammer and hole diameter, while pressure depends on the hammer rating, depth and the water column above the hammer. As a guide, many borewell jobs fall between 600 and 1,500 cfm at 200 to 400 psig, or about 14 to 28 bar. Send us your job details and we will confirm the band.
Can I send my enquiry on WhatsApp?
Yes. WhatsApp +91 99590 60718 with the completed template, photos of the nameplate and any fault, and gauge readings if available. Photos often answer several questions at once. If you prefer, call +91 92468 88812 or email reddycompressors@gmail.com, and a service engineer will follow up on any missing details.
Do you supply borewell compressors outside Telangana and Andhra Pradesh?
Yes. Our service teams cover the whole of Telangana and Andhra Pradesh, and we supply compressors, rentals and spare parts across India, with project-based site support elsewhere where feasible. Tell us the exact site location and duration in your brief so we can plan transport and support for that job.
What should I send for a borewell compressor spare part?
Send the compressor make, model and serial number, a nameplate photo, the part number if you can read it, a clear photo of the old part and the quantity. We identify parts from the machine itself and confirm the fit before quoting, which avoids the cost and delay of a wrong part reaching a remote rig.
Is it better to buy or hire a borewell compressor?
Buying usually suits rig owners with steady year-round work. Hiring suits a single project, peak season, a deeper job than your own machine can handle, or cover while your compressor is under repair. Tell us your expected holes per month and depths, and we can compare a new, used or hired option for your case.
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Technical content reviewed by D. Srinivas Reddy, Managing Partner and service engineer, Reddy Compressors. Last updated 17 October 2026. How our engineering content is reviewed.