Downhole impact generation tool and methods of use

A method of delivering an impact force to a downhole obstruction within a wellbore, comprising:

• conveying an impact generator to the downhole obstruction, the impact generator comprising a housing, a mandrel movably arranged at least partially within a chamber defined in the housing, and a top sub coupled to an uphole end of the housing and having an upper core extension arranged at least partially within the top sub;
• moving the upper core extension from a fixed position, where the mandrel is maintained in an engaged configuration within the housing, to an unfixed position, where the mandrel is able to move to a disengaged configuration;
• moving the mandrel to the disengaged configuration with a biasing device axially arranged within the chamber;
• and
• impacting the downhole obstruction with an impact tool coupled to a distal end of the mandrel when the mandrel is moved to the disengaged configuration.

A downhole impact generator, comprising:

• a housing having an uphole end and a downhole end and a chamber defined therein between a lip defined within the housing and an anvil arranged at or near the downhole end;
• a mandrel movably arranged at least partially within the chamber and defining a shoulder that extends radially about the mandrel;
• a first biasing device arranged within the chamber between the lip and the shoulder of the mandrel;
• and
• an actuation device arranged within the housing and operatively coupled to the mandrel and configured to move the mandrel such that the first biasing device is compressed between the lip and the shoulder, the actuation device being further configured to release the mandrel such that the first biasing device is able expand and move the mandrel in a downhole direction to provide an impact force.

A method of delivering an impact force to a downhole obstruction within a wellbore, comprising:

• conveying an impact generator to the downhole obstruction, the impact generator comprising a housing, a mandrel movably arranged at least partially within a chamber defined in the housing between a lip and an anvil both defined in the housing, and a first biasing device axially arranged within the chamber between the lip and a shoulder defined on the mandrel;
• activating an actuation device arranged within the housing, the actuation device being operatively coupled to the mandrel;
• moving the mandrel with the actuation device such that the first biasing device is compressed between the lip and the shoulder;
• and
• releasing the mandrel such that the first biasing device is able to expand and move the mandrel in a downhole direction to provide an impact force.