In episode 9 of our new video series, Ask Brock, The Driller contributor Brock Yordy talks about one of drilling's many challenges: circulation loss in fractured formations.
I have stated that drilling is 80 percent knowledge and 20 percent luck. Bad luck happens when a driller encounters a loss zone, thus preventing the driller from finishing the hole.
The most expensive problem routinely encountered in geothermal drilling is lost circulation, which is the loss of drilling fluid to pores or fractures in the rock formations being drilled.
