US 11,885,188 B2
Section mill
David J. Ruttley, Alexandria, LA (US); and Gerald J. Cronley, Gretna, LA (US)
Filed by Dynasty Energy Services, LLC, Lafayette, LA (US)
Filed on Nov. 22, 2022, as Appl. No. 18/058,178.
Claims priority of provisional application 63/284,441, filed on Nov. 30, 2021.
Prior Publication US 2023/0167702 A1, Jun. 1, 2023
Int. Cl. E21B 29/00 (2006.01)
CPC E21B 29/005 (2013.01) 18 Claims
OG exemplary drawing
 
1. A section mill comprising:
(a) a longitudinally extending tubular mill body, said longitudinally extending tubular mill body having a central fluid bore;
(b) a mill carrier pivotally mounted to said longitudinally extending tubular mill body by a hinge pin positioned transverse to said longitudinally extending tubular mill body whereby said mill carrier pivots on said hinge pin radially outward from said longitudinally extending tubular mill body at an acute longitudinal angle with respect to said longitudinally extending tubular mill body, said mill carrier having an exterior surface and an interior surface, said interior surface of said mill carrier having a beveled ramp profile;
(c) a translatable piston positioned within said central fluid bore of said longitudinally extending tubular mill body, said translatable piston having an elongated driveshaft having a radially extending nose cone engageable with said beveled ramp profile on said interior surface of said mill carrier; and
(d) wherein said translatable piston is biased in an upward position.