Patent ID: 10815747

Abstract:
A subassembly for inserting a frangible pressure disc seal in the inner conduit of a tubing string in a wellbore, particularly for a deviated wellbore, to seal the tubing string to provide pressure control while required by the operator. The subassembly provides [1] for as well as [2] shock absorption to protect the disc; also provided is a [3] centering, seat engaging ring with fluid pressure vents, which sets and seals the disc from below, while providing ports or vents which supply high pressure fluid from the conduit below the disc to the disc's outer edges, thus making it perform more reliably, and also providing [4] shock absorption to the disc; also provide are [5] ports in the inside wall from the bore of the bottom subassembly to its outer surface above threads and o-ring seals between the top and bottom subassemblies to further equalize high pressure to the entire convex surface of the disc; and [6] a series of set-screws accessible from outside the subassembly, through the upper sub's outer wall to grip in a groove in the outer wall of the lower sub in order to keep the two subs from separating after assembly.