Today's miners, prospecting with modern drilling equipment, sometimes hit old drifts.
The ground around the hole caved in - swallowing all of the drilling equipment.
In 1925, 65% of the drilling equipment for Azerbaijani oil fields were switched to electric power.
That would be great," Dan said, "if we had some deep drilling equipment aboard and a few days to dig.
Heavy drilling equipment and concrete construction facilities are sited in Area 1.
In a test two years ago, the drilling equipment proved to be underpowered, and it has been rebuilt for this year's campaign.
We have heavy drilling equipment on the Lovell that will make fairly short work of it.
You ain't got no drilling equipment, least not that I've seen.
It is also a supplier in the growing market of horizontal drilling equipment.
The expensive drilling equipment over the borehead was destroyed by the intense heat.