Baker Hughes Corporation

Kent A Evans

Steve Rosenblatt

Anthony P Foster

James R Korte

John Thurston

Dustin D Ellis

Justin Bowersock

John M Lee

An overshot has an articulated seal that can be set against the fish when the fish is engaged by the tool. The seal can be actuated from swelling due to exposure to well fluid or mechanically or hydraulically from the string that supports it. The use of spears or overshots with the articulated seal feature is contemplated. If a swelling design is used it can respond to water or hydrocarbons that are found at the subterranean location.

Overshot with dynamic seal feature

A swelling packer is covered with a material that is preferably in a tubular form and slipped over the swelling element to be shrink fit with applied heat. The material is formulated to break down at temperatures slightly below the expected downhole temperatures so that ideally the packer has about 48 hours of swelling delay which is normally a time period long enough to allow it to be properly located without it swelling so much as to cause it to be damaged by running in. Various polymers can be used to make an imperious covering for run in that on the way starts to break down. Ideally the material for the cover disappears about the time of sealing or shortly thereafter.

Swelling delay cover for a packer

Growing community of inventors

Houston, TX, United States of America

Kent A Evans