Extrude a path inside a sphere

Hi guys.
Having some trouble now to extrude a path inside a sphere, or through sphere to be precise.
Will post two pictures from the drawing I've got.
Hope someone can bring an idea to the table :)

http://imgur.com/bTMtI6f
http://imgur.com/ReKCgrz

Thanks!

Answer
 
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2 Answers

Sorry I did not see the picture: Now everything is fine, I do not see what could belfry! I did not see the wall shown in the center that makes the connection between the round tube and square tube. I imagine that the passage of the round tube to square tube, used to create turbulence?

Answered with a tutorial: https://grabcad.com/tutorials/extrude-a-path-inside-a-sphere

 
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