Hi all.

I have this issue and TBH, I don't even know how to ask the question.  So I created this surface tube with another object protruded through it.

So I was able to cut the protruded intake on the inside of the surface tube.

What I'm trying to do is to cut a hole so that the intake can have air pass through it.

I'm not even sure whether what I'm asking makes any sense.  Any suggestion on how to cut the hole on the surface per the graph above?