Patent ID: 8459346

Claim:
A plug for use in a wellbore, comprising: a body having a first end and a second end, wherein the body is formed from one or more composite materials; at least one malleable element disposed about the body; at least one slip disposed about the body; at least one conical member disposed about the body; and an insert at least partially disposed in the body proximate the second end of the body, the insert adapted to receive a setting tool that enters the body through the first end thereof, wherein: the insert comprises one or more shearable threads disposed on an inner surface thereof; the one or more shearable threads are disposed proximate the second end of the body and are adapted to engage the setting tool; and the one or more shearable threads are adapted to deform to release the setting tool when exposed to a predetermined axial force that is less than an axial force required to break the body.