Mono-cone PDC concentric reaming-while-drilling bit

The utility model relates to a mono-cone PDC concentric reaming-while-drilling bit used for petroleum and natural gas drilling. The mono-cone PDC concentric reaming-while-drilling bit comprises a PDC bit body and a mono-cone bit body. The mono-cone bit body is a pilot bit, and the PDC bit body is a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FANG JINZHU, YANG GUOHUI, CHEN YUAN
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:	The utility model relates to a mono-cone PDC concentric reaming-while-drilling bit used for petroleum and natural gas drilling. The mono-cone PDC concentric reaming-while-drilling bit comprises a PDC bit body and a mono-cone bit body. The mono-cone bit body is a pilot bit, and the PDC bit body is a reaming bit. The rotation axis of the mono-cone bit body and the rotation axis of the PDC bit body coincide. Due to the advantage that the rate of penetration of the mono-cone bit body is higher than that of the PDC bit body in a slim hole, the concentric reaming-while-drilling technology and the efficient rock breaking structure of the mono-cone bit body are combined, the mono-cone PDC concentric reaming-while-drilling bit is formed, the range where the mono-cone bit body is applied to drilling of large-size holes in deep stratums is enlarged, and meanwhile the rate of penetration of the concentric reaming-while-drilling bit is increased.