[[Image:Deep rock DR20.jpg|thumb|right|250px|Deep rock DR20]]
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A whole range of small drilling machines exist which can be towed by a car or built on the back of a pick-up, generally in the price range of US$ 5,000 – US$ 10,000. Most of these machines are limited to [[ Jetting - general |rotary jetting]] and [[Percussion - general|percussion]] (in the same way as the [[Percussion - Stone hammer|percussion gouge]]). The bigger machines and down-the-hole hammer systems are generally a lot more expensive (US$ 10,000).
==Suitable conditions==
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==Construction, operations and maintenance==
==Costs==A whole range of small drilling machines exist which can be towed by a car or built on the back of a pick-up, generally in the price range of US$ 5,000 – US$ 10,000. Most of these machines are limited to [[ Jetting - general |rotary jetting]] and [[Percussion - general|percussion]] (in the same way as the [[Percussion - Stone hammer|percussion gouge]]). The bigger machines and down-the-hole hammer systems are generally a lot more expensive (US$ 10,000).
==Field experiences==
==Reference manuals, videos, and links==
* Deep Rock - Engine powered drilling equipment and small machines- http://www.deeprock.com
* Drillingfab - Engine powered drilling equipment and small machines - http://www.drillingfab.com
==Acknowledgements==
