Article 484 of the Civil Code provides that there is co-ownership whenever the ownership of an undivided thing or right belongs to different persons. It further provides that no co-owner shall be obliged to remain in the co-ownership; each co-owner may demand at any time the partition of the thing owned in common, insofar as his share is concerned. This partition may be made by agreement between the parties, or by judicial proceedings, which, like the procedural aspect of the partition by virtue of successional rights, is governed by Rule 69 of the Rules of Court.