Degradable Plug with Friction Ring Anchors

摘要

A disintegrating plug features anchoring with friction rings that are expanded during the setting to contact the tubular. The design is modular and can integrate as many friction rings as needed to fixate the plug against the anticipated treating pressures from above when a ball is landed on the seat of the plug. The friction rings can be standalone or integrated with an adjacent ramp for the next friction ring. The friction rings are made from a disintegrating material along with other parts of the plug so that when the treating procedure is completed the plugs will substantially disappear to facilitate subsequent production. A fracking application is contemplated.

主权项

1. A subterranean plug assembly for treating formations in a borehole defined by a tubular, comprising:
an expandable seal having a passage therethrough adjacent a seal expander; at least one friction ring assembly adjacent said seal; said seal and ring assembly selectively plastically deformed in response to relative movement of said seal expander into contact with the tubular; said ring assembly supporting said seal when said seal is set and pressure differential is applied to the plug with said passage selectively obstructed; said seal, expander and friction ring assembly are made of a disintegrating material for selective removal from the tubular.