Stuck pipe handling method in trenchless pipe construction

The invention discloses a stuck pipe handling method in trenchless pipe construction. The method includes sending a cutter into each stuck pipe by a drill stem of a drilling rig; rotating the cutter to cut off the stuck pipe after the cutter reaches the vicinity of the end of a dragging pipe so as t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU YAN, CHENG ZHIHUI, LIU JIANBIN, SU JIANLIANG, ZHANG HAIZHAO, LI HUIYING, LIU GONGXUN, DENG YINGFANG, ZHAO ZILIANG, ZHAO JUHUI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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