SECTION MILL AND METHOD FOR ABANDONING A WELLBORE

• Main Authors: Bailey, Thomas, Bansal, Ram K, Antoine, Andrew, Brunnert, David J, Seguara, Richard
• Format: Patent
• Language: English
• Published: 11.05.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A system for milling a wellbore comprises a workstring and a mill coupled to the workstring. The mill has a tubular housing including a longitudinal axis, and a plurality of arms coupled to the housing. Each arm has a body portion, and a blade portion extending from an outer surface of the body portion. Each arm is movable laterally and longitudinally along an eccentric extension path between a retracted position and an extended position relative to the housing while an arm length is maintained substantially parallel to the longitudinal axis. The extended position is defined by abutment of each arm against a corresponding arm stop, and is adjustable by a selection of each corresponding arm stop from first and second arm stops. Engagement of a given arm of the plurality of arms with the first arm stop provides a first lateral blade sweep dimension. Engagement of the given arm of the plurality of arms with the second arm stop provides a second lateral blade sweep dimension greater than the first lateral blade sweep dimension. 201i-203o 203o Outer Coupling OD Outer Coupling ID/Outer Casing OD Outer Casing ID - 202o Inner Coupling ID/Inner Casing OD L Inner Casing ID - 221t 203i Annulus (Cement) 1 207p 202i Inner Casing Drift j! !L208 Outer Casing Drift 201i Inner Coupling OD 218 217r,s 119i 75