Removable treating plug with run in protected agglomerated granular sealing element

摘要

A fully disintegrating plug has a passage therethrough and a ball seat at an upper end. The seal material that comprises plastic nuggets, sand and a grease binder is initially disposed behind a protective sleeve. A wireline setting tool creates relative movement between a plunger and a mandrel body that has a ramp surface adjacent the outlet of the protective sleeve. The sleeve outlet is closed for running in but plunger movement pushes the seal material so as to displace the closure at the sleeve outlet with the seal material that is forced up the mandrel ramp surface and against the surrounding tubular. After an object is landed on the mandrel seat and the treating is concluded, the plug components are caused to disintegrate or otherwise fail for complete removal. Multiple plugs are contemplated for fracturing or other treating applications.

主权项

1. A disintegrating plug for subterranean use in a borehole defined by a borehole wall, comprising:
a mandrel having a selectively closed passage therethrough; a sealing mixture initially disposed in a cavity defined by said mandrel said cavity having a selectively sealed outlet; a plunger selectively movable with respect to said mandrel to push said sealing mixture out of said cavity and into an annular gap between said mandrel and the surrounding borehole wall; and said mandrel comprises an external ramp adjacent said selectively sealed outlet that changes the dimension of said annular gap.