Petroleum drilling rig derrick

The utility model relates to a petroleum drilling rig derrick, which is a design for improving the petroleum drilling rig derrick. The utility model comprises a derrick body that is integrally raised or put down by a Y-shaped bracket. The utility model is characterized in that neither leg of the der...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	TANG SHANGZHI, NING XIANYAO, GAN SHIMING
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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