Hi Silvia, see if this helps you: https://www.wikihow.com/Clean-Oriental-Rugs
This should help: https://www.angieslist.com/articles/how-clean-oriental-rugs.htm
Oriental rugs are usually very expensive so I would contact a flooring company to get some really good advice on how to clean it. Most rugs can be cleaned with a rug cleaner with a special rug detergent such as Bissell. Do not over saturate when cleaning no matter what method you use.
I recently saw an instagram post where someone cleaned their rug with a pressure washer outs. If you have nothing to loose and it needs a deep clean I would try this.