Metal Patch System

摘要

An apparatus, method and system repair wellbore casing. In one embodiment, an expandable casing patch system for a wellbore includes a casing patch deployment apparatus. The casing patch deployment apparatus includes a shaft having a frontward end and a rearward end as well as a thruster and a main expansion swage disposed on the shaft. The casing patch deployment apparatus also includes an anchor disposed on the shaft. The anchor is disposed frontward of the main expansion swage. In addition, the casing patch deployment apparatus includes a front expansion swage disposed frontward of the anchor and attached to the shaft. The front expansion swage has a diameter less than a diameter of the main expansion swage. The expandable casing patch system also includes an expandable casing patch.

主权项

1. An expandable casing patch for deployment in a wellbore, wherein the wellbore comprises a restriction, and wherein the restriction comprises a diameter, and further wherein the wellbore comprises a wellbore casing, comprising:
a base tubing; an under-gaged sealing component, wherein the under-gaged sealing component comprises an internal diameter less than an internal diameter of the base tubing; wherein an external diameter of the under-gaged sealing component is less than the diameter of the restriction; wherein upon radial expansion of the under-gaged sealing component, the under-gaged sealing component develops an interference contact with the wellbore casing.