Corrosion prevention nipple

The utility model belongs to down-hole tools used for oil field oil production engineering and relates to a corrosion prevention nipple which is mainly used for down-hole tubular column matching of air foam injected type wells. The corrosion prevention nipple comprises an oil pipe nipple body and sa...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LI JIANXIONG, WANG HONGHUA, ZHU MINGHUA, HE YUNZHANG, PENG HONGBO, LIN YONGJUN, PENG GUOLIANG
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MINING MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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