Method for installing instruments in wells

A method for installing an instrument at or near the bottom of a cased well. A cavity is formed within the body of a float shoe or float collar positioned at the bottom or near the bottom of a casing string as it is assembled for installation in a well. An instrument is positioned within the cavity...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BLACKER, HARRISON F, WITHERS, ROBERT J
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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Beschreibung
Zusammenfassung:	A method for installing an instrument at or near the bottom of a cased well. A cavity is formed within the body of a float shoe or float collar positioned at the bottom or near the bottom of a casing string as it is assembled for installation in a well. An instrument is positioned within the cavity and an appropriate electrical cable is run from the instrument along the outer side of the casing string to the earth surface. The float shoe or float collar provides mechanical protection for the instrument during the installation of the casing string in the wellbore and during the cementing operation and ensures good acoustic coupling of the geophones to the earth in the downhole applications.