CUTTING INSERT FOR INITIATING A CUTOUT

A milling tool (309) includes a cutting insert (328, 329) coupled to a movable blade (322, 323). The movable blade may change from a retracted to an expanded state to engage and cut downhole casing (203). A cutout initiation region of the movable blade makes contact with the downhole casing, and cut...

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Bibliographische Detailangaben
Hauptverfasser:	Balasubramanian, Nagarajan, Xia, Sike
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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
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Beschreibung
Zusammenfassung:	A milling tool (309) includes a cutting insert (328, 329) coupled to a movable blade (322, 323). The movable blade may change from a retracted to an expanded state to engage and cut downhole casing (203). A cutout initiation region of the movable blade makes contact with the downhole casing, and cutting inserts with turning portions designed to cut in a turning manner may be located in the cutout initiation region. Cutting inserts with milling portions designed to cut in a face-milling manner may be located outside the cutout initiation region. Some cutting inserts may include both turning portions and milling portions.