PLANETARY DRILL

drilling equipment to drill large-diameter holes. SUBSTANCE: planetary drill includes turbo-drill anchored in upper and lower cross- pieces whose axis is displaced relative to axis of hole. Turbo-drill is coupled to drill pipe string with the aid of central shaft. Longitudinal axis of turbo-drill is...

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Bibliographische Detailangaben
Hauptverfasser:	CHAJKOVSKIJ G.P, IOANESJAN JU.R, MESSER A.G
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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Beschreibung
Zusammenfassung:	drilling equipment to drill large-diameter holes. SUBSTANCE: planetary drill includes turbo-drill anchored in upper and lower cross- pieces whose axis is displaced relative to axis of hole. Turbo-drill is coupled to drill pipe string with the aid of central shaft. Longitudinal axis of turbo-drill is inclined towards axis of central shaft at angle from 30 min to 7 degrees. For stabilization and centering of planetary drill along axis of hole it is fitted with drilled barrel which lower end carries rotary bit satellite-runner. EFFECT: increased productivity of drilling thanks to growth of axial load on drill bit and reduced vibration of planetary drill. 2 cl, 3 dwg