A down-the-hole drill, usually called DTH by most professionals, is basically a mini jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small flakes and dust and is blown clear by the air exhaust from the DTH hammer. The DTH hammer is one of the fastest ways to drill hard rock. Now smaller portable drillcat drilling rigs with DTH hammers can drill as fast as much larger truck rigs with this newer technology. 

    In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly behind the drill bit. The drill pipes transmit the necessary feed force and rotation to hammer and bit plus compressed air or fluids for the hammer and flushing of cuttings. The drill pipes are added to the drill string successively behind the hammer as the hole gets deeper. The piston strikes the impact surface of the bit directly, while the hammer casing gives straight and stable guidance of the drill bit. This means that the impact energy does not have to pass through any joints at all. The impact energy therefore is not lost in joints allowing for much deeper percussion drilling. This is a great breakthrough for smaller portable water well drilling rigs, that before were limited. The DTH on smaller rigs now can get same results as large heavy truck rigs.

                                          HQZ-150L          HQZ-180L          HQZ-200L           HQZ-300L           HQZ-400L          HQZ-500L    

Max.Drilling depth           150M                  180M                   200M                   300M                    400M                500M

Drilling Bits                                                                                   76mm~400mm

Drilling Rods                                                                             60mm/76mm/89mm

Advance Length/time  1.5M/3M             3M/6M                3M/6M                 3M/6M                 3M/6M             3M/6M

Engine Power                   42kw                    60kw                   76kw                    92kw                    110kw              134kw 

Crawler                             rubber            rubber/steel        rubber/steel             steel                     steel                  steel

Optional equipment                                           Welder / remote control system / dust collector

Air Compressor(_cbm/min/_Bar)         15/14.5             18/17             19/18                29/23               31/25               ... ...

Applicable Depth                                   50~100M        100~150M    150~200M      200~300M     300~400M           ... ...

- To be shipped in a 20 'container

- It takes 3~7days to get your goods ready

- We have rich experience in exporting 180 sets per year

- We Can do EXW/ FOB/ CFR/ CIF/ DDP.....Please contact us for the details

Welcome to visit our factory! For evey visitor we will offer :
- Airport pickup.
- Free hosting
- Machine demonstration with free teaching
- Let you know the full range of products you want to buy

Once bought, lifetime guarantee

We want to connect with customers all over the world with excellent quality

Please feel free to contact us for any questions!

I'll get back to you as soon as possible.

If you don't know what kind of drilling rig is suitable for your situation, Please describe your geology and estimated depth, I am glad to recommend a suitable rig for your situation.

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