Animated Schematic of the Reverse Circulation Drilling Process

The diagram below shows how the sample travels after it is broken at the face of the Bit until it is in the sample bag.

The velocity of this material traveling up the pipe is approximately 15,000 feet/minute.

In a 500 foot hole it takes approximately 3 seconds from the time the sample is broken at the face of the bit until it is in the sample bag.