Tool protection guide with energy absorbing bumper

摘要

A device for guiding a tool (not shown) on a string within a blow out prevention ("BOP") stack includes a top collar 200 connected to a bottom collar 202 by a shroud 204 having a plurality of flexible members 205 which bow outwardly from the collars 200,202, wherein the shroud covers a portion of the tool. An energy absorbing bumper 101 is provided above the top collar 200 to absorb structural impact caused by a blow out or other inadvertent pressure in a downhole application. When used in large diameter BOP stacks upper and lower adapter collars (not shown) carrying additional bow springs may be added to increase the overall diameter of the device.