Hole enlargement drilling device and methods for using same

A bottomhole assembly (BHA) coupled to a drill string includes one or more controllers, and a hole enlargement device that selectively enlarges the diameter of the wellbore formed by the drill bit. The hole enlargement device includes an actuation unit that may move extendable cutting elements of th...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Bothmann Gunnar, Herberg Wolfgang E, Meister Matthias, Oppelaar Hans-Robert, Freyer Carsten, Treviranus Joachim
Format:	Patent
Sprache:	eng
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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