Decomposable impediments for downhole plugs

A configurable insert for a plug, comprising:

• a body having a bore formed at least partially therethrough, wherein the bore has a larger inner diameter that transitions to a smaller inner diameter, defining an inner shoulder therebetween;
• at least one shear element disposed on the body for connecting to a setting tool, wherein the shear element releases the setting tool when exposed to a predetermined force that is less than a force required to break the body;
• an impediment disposed within the bore for blocking fluid flow in at least one direction through the bore, wherein the impediment comprises a decomposable material;
• one or more threads disposed on an outer surface of the body below the at least one shear element for connecting the body to the plug;
• and
• at least one circumferential groove disposed on the outer surface of the body below the one or more threads on the outer surface of the body, wherein the at least one circumferential groove is adapted to retain an elastomeric seal element therein.

A downhole tool, comprising:

• a mandrel;
• at least one sealing element disposed about the mandrel;
• at least one slip disposed about the mandrel;
• at least one conical member disposed about the mandrel;
• and
• a configurable insert disposed within the mandrel, the configurable insert comprising:
• a body having a bore that is blocked with an impediment such that fluid flow is prevented through the body in both axial directions, wherein an outer surface of the body has a larger outer diameter that transitions to a smaller outer diameter, defining a frustoconical outer shoulder therebetween, and where in the impediment comprises one or more decomposable materials;
• at least one shear element disposed on the body for connecting to a setting tool, wherein the shear element releases the setting tool when exposed to a predetermined force that is less than a force required to break the body;
• and
• one or more threads disposed on the outer surface of the body below the at least one shear element for connecting the body to the mandrel, wherein the one or more threads are disposed on the larger outer diameter of the body.