HIGH-STRENGTH CORROSION-RESISTANT TUBING FOR OIL AND GAS COMPLETION AND DRILLING APPLICATIONS, AND PROCESS FOR MANUFACTURING THEREOF

• Main Author: MANNAN, SARWAN, KUMAR
• Format: Patent
• Language: English; French; German
• Published: 25.05.2016
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A high strength corrosion resistant tubing comprises about 35 to about 55% Ni, about 12 to about 25% Cr, about 0.5 to about 5% Mo, up to about 3% Cu, about 2.1 to about 4.5% Nb, about 0.5 to about 3% Ti, about 0.05 to about 1.0% Al, about 0.005 to about 0.04% C, balance Fe plus incidental impurities and deoxidizers. The composition also satisfies the equation: (Nb−7.75 C)/(Al+Ti)=about 0.5 to about 9. A process for manufacturing the tubing includes: extruding the alloy to form a tubing; cold working the extruded tubing; annealing the cold worked tubing; and applying at least one age hardening step to the annealed tubing. Another process includes extruding the alloy at a temperature of about 2050° F. or less; annealing the extruded tubing; and applying at least one age hardening step to the annealed tubing.