Sorry. When I think oiler, I think of something like the second image.
However, when someone says crack pipe, I think of something else (see first image).
I used the term for clarity sakes. I wasn't aware of anyone calling what I meant anything but a crack pipe.
Also, if the picture of hobo smoking the crack pipe used to show what I mean is too "dirty," let me know and I'll edit in a better one (if I can find one).
P.S. My friend has used a pipe exactly like the hobo is using for DMT. Said it worked pretty well, and it's portable.