Coal-mine broken-soft-coal-seam flexible internal control rotary directional drilling system and method

The invention discloses a coal-mine broken-soft-coal-seam flexible internal control rotary directional drilling system and method. The drilling system comprises a flexible internal control rotary directional drilling tool, a positioning system, a spiral drill pipe, an openable drill bit and a double...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	WANG LI, JIA MINGQUN, WANG YI, HUANG HANJING, XU BAOLONG, HOU HONG, YAO YAFENG
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 SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention discloses a coal-mine broken-soft-coal-seam flexible internal control rotary directional drilling system and method. The drilling system comprises a flexible internal control rotary directional drilling tool, a positioning system, a spiral drill pipe, an openable drill bit and a double-power-head drilling machine; the flexible internal control rotary directional drilling tool is located between the spiral drill pipe and the openable drill bit to achieve rotary directional drilling, the positioning system penetrates the spiral drill pipe to have drilling traces measured, the double-power-head drilling machine includes a large power head and a small power head to provide drilling power, the flexible internal control rotary directional drilling tool comprises a flexible outer pipe, a core bending shaft, a bearing pack and a sleeve, the positioning system comprises an upper non-magnetic drill pipe, a lower non-magnetic drill pipe, an outer exploring pipe, a measuring exploring pipe, a cable-through