You would mostly see this on new Iranian carpets. It is the sign of a very tightly woven carpet or rug another words eye candy. You will need to do this with a waxed lining thread (most carpet supply stores carry this in a olive green color.) This stuff is like steel and should be sewn with a zig-zag pattern. It is not hard as you would go through the top and back up exposing the thread on the floor side or back of carpet and straight up through the pile again repeat. You would charge for this by the hour with a minimum of 2 hours plus cost. You can do this! Keep me posted I will assist.