Downhole drilling rig end face finishing combination tool and finishing method thereof

The invention discloses a downhole drilling rig end face finishing combination tool and a finishing method thereof. The downhole drilling rig end face finishing combination tool comprises a salvage drill pipe, a screw rod drilling rig and a grind shoe which are sequentially in screw thread connectio...

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Bibliographische Detailangaben
Hauptverfasser:	YAN JIAN, GE LEI, ZHANG PENG, JIA TAO, LI WENMING, LU FENG, ZHANG JIANKUO, ZHANG XIMIN, LI LIGUO, SU SHANLIN
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 discloses a downhole drilling rig end face finishing combination tool and a finishing method thereof. The downhole drilling rig end face finishing combination tool comprises a salvage drill pipe, a screw rod drilling rig and a grind shoe which are sequentially in screw thread connection together from top to bottom; the screw rod drilling rig comprises a motor, a shell and a transmission screw rod, the shell is arranged outside the motor, the upper end of the shell is connected with the salvage drill pipe, a centering cylinder is mounted on the lower part of the shell of the motor, the upper end of the transmission screw rod is connected with the output end of the motor, and the lower end of the transmission screw rod is connected with the grind shoe in a screw thread mode; and the grind shoe is located inside the centering cylinder, the lower end of the centering cylinder is lower than the lower end of the grind shoe, and the inner wall of a lower end opening of the centering cylinder is a circu