ALLIAGE PERFECTIONNE POUR LA FABRICATION DE CHEMISAGES ET DE TUBES A HAUTE RESISTANCE MECANIQUE POUR PUITS PROFONDS

An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H2S-CO2-Cl--environment, which comprises the following alloy composition: -C: </=0.1% Si...

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Bibliographic Details
Main Author TAKEO KUDO, YASUTAKA OKADA, TAISHI MOROISHI, AKIO IKEDA, HIROO OHTANI ET KUNIHIKO YOSHIKAWA
Format Patent
LanguageFrench
Published 14.10.1988
Subjects
ALLOYS
CHEMISTRY
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FERROUS OR NON-FERROUS ALLOYS
FIXED CONSTRUCTIONS
METALLURGY
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:An alloy useful for manufacturing high strength deep well casing, tubing and drill pipes for use in oil-well operations is disclosed. The alloy exhibits improved resistance to stress corrosion cracking in the H2S-CO2-Cl--environment, which comprises the following alloy composition: -C: </=0.1% Si: </=1.0% -Mn: </=2.0% P: </=0.030% -S: </=0.005% N: 0-0.30% -Ni: 25-60% Cr: 22.5-35% -Mo: 0-7.5% (excl.) W: 0-15% (excl.) -Cr (%) + 10Mo (%) + 5W (%) >/= 70% -3.5% </= Mo (%) + 1/2W (%) < 7.5% -Cu: 0-2.0% Co: 0-2.0% -Rare earths: 0-0.10% Y: 0-0.20% -Mg: 0-0.10% Ca: 0-0.10% - one or more of Nb, Ti, Ta, Zr and V in the total amount of 0.5-4.0%, if necessary, Fe and incidental impurities: balance.
Bibliography:Application Number: FR19820010119