Jet-recoil type underground pipe cutter and method for exposing ore bed

The pipe cutter with connected rod body is a cylindric structure with smaller end faces and thicker middle part, which has main blade group at one side and nozzle at another side. The pipe cutter rotates with drilling rod and can cut off casing by using recoil of jet as positive pressure. Jet can da...

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Bibliographische Detailangaben
Hauptverfasser:	FAN CHUANZHONG, TUO ZHIPING
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 pipe cutter with connected rod body is a cylindric structure with smaller end faces and thicker middle part, which has main blade group at one side and nozzle at another side. The pipe cutter rotates with drilling rod and can cut off casing by using recoil of jet as positive pressure. Jet can damage the cement ring for cementing and ore bed to form a space. Said working procedure is continuously performed from lower to upper to expose ore bed.