US 12,071,824 B2
Milling tool
Kevin Dewayne Jones, Clinton, OK (US)
Assigned to Tenax Energy Solutions, LLC, Clinton, OK (US)
Filed by Tenax Energy Solutions, LLC, Clinton, OK (US)
Filed on Jun. 4, 2021, as Appl. No. 17/338,844.
Claims priority of provisional application 63/034,744, filed on Jun. 4, 2020.
Prior Publication US 2021/0381329 A1, Dec. 9, 2021
Int. Cl. E21B 29/00 (2006.01); E21B 23/14 (2006.01)
CPC E21B 29/002 (2013.01) [E21B 23/14 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method of using a system comprising a downhole milling tool, the downhole milling tool comprising:
a housing having an outer surface and at least one pocket formed therein; and
a blade installed within the pocket and movable relative to the housing between open and closed positions;
in which the blade projects from the outer surface of the housing when in the open position;
in which the system comprises:
a cased wellbore extending within an underground environment; and
an elongate tubular drill string having opposed first and second ends, the first end being situated within the cased wellbore;
in which the downhole milling tool is attached to the first end of the drill string;
in which the method comprises:
lowering the drill string and the downhole milling tool further into the cased wellbore;
rotating the drill string and the downhole milling tool upon encountering an object that is blocking a path of travel of the downhole milling tool, in which rotation of the downhole milling tool causes the blade to move to the open position;
continuing to rotate the drill string and the downhole milling tool until the object no longer blocks the path of the travel of the downhole milling tool;
stopping rotation of the drill string and the downhole milling tool such that the blade moves to the closed position; and
lowering the drill string and the downhole milling tool further down the cased wellbore.