METHOD OF MANUFACTURING A CURVED FLAPPER

摘要

A method of making a curved flapper for use in a subsurface safety valve from flat plate material is provided. In one embodiment of the method of the invention, the flat plate material may be rolled into a curved section of material, whether it be a partial or complete cylinder, from which the curved flapper may be machined. In another embodiment of the method of the invention, the flat plate material may be a block of material of sufficient width such that the curved flapper may be machined therefrom. In another embodiment of the method of the invention, the flat plate material may be stamped into a partial cylinder, from which the curved flapper may be machined.