Hi
the original rings are one piece and their job is to allow just enough oil through into the cylinder bore but not so much that the engine smokes, piston rings have to be fitted the correct way up as they typically have a chamfer that is to say the sharper edge points towards the bottom of the piston skirt so oil is scraped down the bore back into the crankcase not up the bore to the head, typically if you have an engine apart you fit new rings as they do wear out, and weirdly I have a box of rings I want to flog,Bill.