Manufacturing method of K-shaped derrick of high-position backward folding type petroleum drilling machine

The invention discloses a manufacturing method of a high-position backward folding type K-shaped derrick of a petroleum drilling machine, the uppermost end section of the derrick adopts an integral welding truss structure, a rotating point lug plate hole at the backward folding position is integrall...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHOU LI, XIAO HU, ZHANG LINSEN, ZHANG XIAOLONG, WANG HAIFENG, LIU HAIFENG, XU BINRONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	COMBINED OPERATIONS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS TRANSPORTING UNIVERSAL MACHINE TOOLS
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