Anti-breakage corrosion-resistant screw drill

The utility model discloses an anti-breakage corrosion-resistant screw drill. The screw drill can prevent parts at the lower end of the drill from falling into a well through an anti-falling connection sleeve blocking block when the lower end of a transmission shaft breaks and disengages. The screw...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GUO NAICHENG, ZHU JIACHUN, ZHU JIAQUAN, GUO DAHE, JIANG GANYING, CHEN YEHONG, WANG YUJIN, LU WENJUN, CHEN FEI, WANG GUOHUA
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses an anti-breakage corrosion-resistant screw drill. The screw drill can prevent parts at the lower end of the drill from falling into a well through an anti-falling connection sleeve blocking block when the lower end of a transmission shaft breaks and disengages. The screw drill comprises a bypass valve, an upper anti-falling assembly connected with the lower end of the bypass valve, a motor assembly connected with the lower end of the upper anti-falling assembly, a universal shaft assembly connected with the lower end of the motor assembly, a transmission shaft assembly connected with the lower end of the universal shaft assembly, and a lower anti-falling assembly arranged on the transmission shaft assembly. The transmission shaft assembly at the lower end of the lower anti-falling assembly is provided with an anti-falling connection sleeve device. The anti-falling connection sleeve device structurally comprises an anti-falling connection sleeve, wherein one end of the anti-falling connection sleeve is fixed to the transmission shaft assembly through a retaining bolt, the other end of the anti-falling connection sleeve is provided with a blocking block, the blocking block is matched with an anti-falling nut on the transmission shaft, and the outer surface of the transmission shaft is provided with an alloy corrosion-resistant abrasion-resistant coating.