Well completion plugs with degradable components

摘要

A downhole tool for use in completing a well includes a plug body selectively securable to a wellbore at a desired elevation and having a flowbore. A non-dissolvable flow restrictor is operably disposed in the flowbore and operates to restrict fluid flow through the flowbore, and a time-dissolvable retainer or spacer is operably coupled to the flow restrictor to retain the flow restrictor in a first position within the flowbore. The retainer is dissolvable within a predetermined passage of time to release the flow restrictor to move between the first position and a second position within the flowbore to control the flow of fluid through the downhole tool.

主权项

1. A downhole tool for use in completing a well, comprising:
a) a plug body selectively securable to a wellbore at a desired depth and having a flowbore formed therein; b) a non-dissolvable flow restrictor disposed in the flowbore and operable to restrict a flow of fluids through the flowbore; c) a time-dissolvable retainer pressed against the flow restrictor to retain the flow restrictor in a first position within the plug body, the retainer being dissolvable within a predetermined passage of time inside a natural wellbore environment to release the flow restrictor to move between the first position and a second position within the plug body; and d) the time-dissolvable retainer comprising at least one biodegradable ball.