These circuit boards are used in all sorts of intelligent drill head sensor
electronics (analyzing geological characteristics and drill monitoring).

On Thu, Sep 27, 2018 at 10:41 AM Jack Olson <[log in to unmask]> wrote:

> just curious - what is the function of the circuit board at the end of the
> drill?
> I mean, what is it DOING at the bottom of the hole?
>
> On Thu, 20 Sep 2018 15:38:24 +0000, Stadem, Richard D <
> [log in to unmask]> wrote:
>
> >I work for a company in Norway (in my spare time, LOL) who manufactures
> downhole electronics. It is a completely different world, building
> electronics that must survive, MUST survive, in the world's harshest
> environment, quickly going from typical 16-20 deg. C then to freezing while
> in arctic water in the north Atlantic, then quickly ramping up to as hot as
> 175 C during normal all-day drilling, sometimes hotter for a short-term
> controlled drill, then it is flooded with a mix of oil and mud and gravel
> and salt water, and the shock and vibration are beyond belief. You come
> away with a different perspective on high-rel electronics than you ever had
> before, believe me.
> >
>