Dipstick/broke

My 74 Duster 318 kept leaking oil, finally saw it was at dipstick at front of block, when i pulled dipstick out, part of the tube came out with dipstick, it broke flush at the block, can.t even get needle nose on end of what's left, several videos on you tube shows threading tube and then put a long bolt thru something like a socket big enough for tube to come up into socket as you screw a bolt into threaded piece of tube, my problem is with this , what about all the filing going into the oil while cutting new threads, has anyone else had this problem ,or a suggestion that would be better ?