Patent Number: 6,167,970

Title: Isolation tool release mechanism

Abstract: A release mechanism for use with setting wellbore isolation tools, such as packers or bridge plugs. The release mechanism typically includes a release piston which selectively isolates equalization ports extending from the interior to the exterior of a setting tool body. The release piston may be activated to allow equalization of pressure across the sealing elements of a set isolation tool, typically by applying pressure to the annular space above the isolation tool. The release mechanism may be used to allow a tool body (such as a setting or retrieving tool) to be removed from a set isolation tool under conditions in which high pressure differential exists across the isolation tool.

Inventors: Stout; Gregg W. (Montgomery, TX), Matte; James T. (Broussad, LA)

Assignee: B J Services Company

International Classification: E21B 23/04 (20060101); E21B 23/00 (20060101); E21B 23/06 (20060101); E21B 023/04 (); E21B 023/06 ()

Expiration Date: 01/02/2018