Method for raising wear-resistance of by-pass valve in screw motive drilling tool

The present invention relates to a method for raising abrasion resistance of screw power drill by-pass valve for directional drilling. Said method is characterized by adopting spray-welding technique to spray-weld one or several abrasion-resisting bands on the by-pass valve joint position so as to a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	ZHENGQIAN,HAN GU
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	The present invention relates to a method for raising abrasion resistance of screw power drill by-pass valve for directional drilling. Said method is characterized by adopting spray-welding technique to spray-weld one or several abrasion-resisting bands on the by-pass valve joint position so as to attain the goal of raising by-pass valve abrasion-resisting strength and further prolonging service life of by-pass valve and power drill.