Field Test of a Downhole-Activated Centralizer To Reduce Casing Drag

Autor:	Angelo Calderoni, Holger Kinzel
Rok vydání:	1995
Předmět:	Engineering Petroleum engineering business.industry Mechanical Engineering Energy Engineering and Power Technology Field tests Cementation (geology) Centralizer and normalizer Wellbore Drag Locking mechanism Submarine pipeline business Casing
Zdroj:	SPE Drilling & Completion. 10:112-114
ISSN:	1930-0204 1064-6671
DOI:	10.2118/26752-pa
Popis:	A good cementation is based on an adequate centralization. Conventional bow-type centralizers create a drag force, which is not acceptable under certain conditions. The downhole-activated centralizer (DACTM ) was developed for use in highly inclined wells and whenever restrictions in the wellbore like close tolerance wellheads have to be passed. It can be released by external hydraulic pressure, by temperature or by a chemical reaction. The first downhole-activated centralizers with pressure released locking mechanism were field tested in two wells offshore Italy. These field tests proved the function and the effectiveness of the downhole-activated centralizers under operational conditions.
Databáze:	OpenAIRE
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