Toolstring and method for inner casing perforating, shattering annulus cement, and washing the first annulus in a second casing

A method of sealing a partly or entirely annulus-cemented casing portion of a first casing in a second casing in a petroleum well, includes running a drill pipe string-conveyed perforating gun with a cement shattering device into said well; positioning said perforating gun at said cemented casing po...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Jarle Varhaug, Andreas Fliss, Bjorn Tore Torvestad
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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