Helical tooth ladder bottom-spraying type diamond bit

The invention relates to a helical tooth ladder bottom-spraying type diamond bit comprising a drilling bit steel body and a diamond working layer installed on one end part of the drilling bit steel body; the drilling bit steel body has a tubular structure on the whole; the diamond working layer is i...

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Bibliographische Detailangaben
Hauptverfasser:	ZHU HENGYIN, CAI ZHENGSHUI, WANG QIANG, WU XUANCHENG
Format:	Patent
Sprache:	chi ; 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:	The invention relates to a helical tooth ladder bottom-spraying type diamond bit comprising a drilling bit steel body and a diamond working layer installed on one end part of the drilling bit steel body; the drilling bit steel body has a tubular structure on the whole; the diamond working layer is installed at the tube end of the drilling bit steel body and has a cone structure on the whole; a cone-type end of the diamond working layer is provided with a rock core inlet; the surface where buses of the diamond working layer are positioned is provided with right-handed screw fan-shaped blocks; multiple fan-shaped blocks are installed in the circumferential direction of the diamond working layer with intervals; the total projection area of the fan-shaped blocks is less than 40% of the projection area of a bit bottom lip part; a fan-shape recess is formed between two fan-shaped blocks; the bottom of each of the fan-shape recess is provided with a water spray hole; the water spray hole is communicated with a tube