METHOD AND APPARATUS FOR DRILLING AUXILIARY HOLES

A method for drilling an auxiliary hole, such as a conductor hole, a mousehole or a rathole, useful in wellbore drilling operations, the method comprising the steps of installing an auger drive unit on a drill floor of a drilling rig, the auger drive unit comprising a drive having a rotor, and a str...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	STOIK, RANDY STEVEN
Format:	Patent
Sprache:	eng ; fre
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 method for drilling an auxiliary hole, such as a conductor hole, a mousehole or a rathole, useful in wellbore drilling operations, the method comprising the steps of installing an auger drive unit on a drill floor of a drilling rig, the auger drive unit comprising a drive having a rotor, and a structure for supporting the drive, the drive movable on at least one rail in a substantially vertical plane in relation to the structure, the method further comprising the steps of setting the at least one rail at an angle with respect to the structure, connecting an auger to the rotor and rotating the auger and lowering the drive on the at least one rail to drill the auxiliary hole at a desired angle.