No, there are no Devil Fruits that allow a user to swim in water. Every Devil Fruit user has the same basic weakness.
Since wood is lighter than water, he might be able to float on the water though. While floating on the water, you are submerged for over 50%, which would result in energy drainage for fruit users and make the user unable to move and even if he could master some energy to move his arms or legs, if he wants to move through the water he has to put them in the water, submerging himself more and losing even more energy. So my guess would be that the user would not drown and be able to motionlessly float around the ocean. He has to go into the water laying face up though or he would not be able to breath and still drown anyway (but not sink). So I guess if such a user falls into the water and would emerge with his head first fast enough before passing out, he might be able to survive, but probably not for long.