Rock Coring

[learning2geotech]

How come some drillers avoid rock coring? Is it because rock coring requires experienced drillers? If yes, how so, what are the disadvantages in rock coring comparing to soil drilling from the driller's point of view? Or is it because they're afraid of losing expensive equipment down the hole. If yes, how does that happen?

 

[EireChch]

In the UK some companies only have cable percussion rigs so cant drill rock or very hard/dense soils. Cable percussion rigs are very cheap compared to rotary drilling rigs.

Id say cost is the main reason.

 

[geotechguy1]

Equipment / cost?

I've ran into drillers who wouldn't do deeper drilling or drilling in certain areas for 'cheap' consultants so that can also be part of it.