Measure the length you need to go when inserting the tube. Put some tape around it at that point and insert to remove the rest of the oil.
Then put some adsorbent pads under your engine. Remove the Oil pan drain plug and use a wire snake going in to find the broken off tubing.
Now re plumb a new waste oil
line leading from the Oil pan drain plug outlet.
By taking the slump plug and go to the hardware store and get some tubing and connections that is of that size.
will be: Slump pan hose connection, Length of oil hose, another connection, a valve, and a pipe plug for the value unless you want to put a quick connect on the end of it.
Then you won't need to ever use the dip tube again for waste oil removal.
This is the way we do it on the bigger vessels.
The oil hose is the type used for oil and hydralic
lines. Don't subsitute water hose for this purpose.