Automated steerable hole enlargement drilling device and methods

A bottom hole assembly (BHA) coupled to a drill string includes a steering device, one or more controllers, and a hole enlargement device that selectively enlarges the diameter of the wellbore formed by the drill bit. In an automated drilling mode, the controller controls drilling direction by issui...

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Hauptverfasser: TREVIRANUS JOACHIM, OPPELAAR HANS-ROBERT, FREYER CARSTEN
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creator TREVIRANUS JOACHIM
OPPELAAR HANS-ROBERT
FREYER CARSTEN
description A bottom hole assembly (BHA) coupled to a drill string includes a steering device, one or more controllers, and a hole enlargement device that selectively enlarges the diameter of the wellbore formed by the drill bit. In an automated drilling mode, the controller controls drilling direction by issuing instructions to the steering device. In one arrangement, the hole enlargement device is integrated into a shaft of a drilling motor that rotates the drill bit. The hole enlargement device includes an actuation unit and an electronics package that cooperate to translate extendable cutting elements between a radially extended position and a radially retracted position. The electronics package may be responsive to a signal that is transmitted from a downhole and/or a surface location. The hole enlargement device may also include one or more position sensors that transmit a position signal indicative of a radial position of the cutting elements.
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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
title Automated steerable hole enlargement drilling device and methods
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