Tubular high strength low alloy steel for oil and gas wells

Details Tubular high strength low alloy steel for oil and gas wells Tubular high strength low alloy steel for oil and gas wells

1982-10-07

1984-06-12

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 36, C21D 810

Patent

active

044539860

ABSTRACT:
An article of manufacture is provided comprising a heat treated high strength low-alloy steel tubular product of the L-80 and N-80 type suitable for use as an oil well tubular member. The composition consists essentially of about 0.1 to 0.4% C, about 0.075 to 0.4% Mo, about 0.002 to 0.03% N, about 0.75 to 1.5% Mn, about 0.1 to 0.4% Si, and the balance essentially iron, the carbon and molybdenum contents being controlled and correlated such that for a carbon content ranging from about 0.1 to 0.25%, the molybdenum content ranges from about 0.075 to 0.25%; and for a carbon content ranging from about 0.25 to 0.4%, the molybdenum content ranges from about 0.2 to 0.4%.

REFERENCES:
patent: 3539404 (1970-11-01), DeRetana
patent: 3915697 (1975-10-01), Gioliani et al.
patent: 3976514 (1976-08-01), Matsukura et al.
patent: 4008103 (1977-02-01), Miyoshi et al.
patent: 4204892 (1980-05-01), Economopolous
patent: 4300598 (1981-11-01), Royer et al.
patent: 4388123 (1983-06-01), Murayama
Iron Age, Nov. 12, 1980, "Materials Come First in Sour Gas Drilling", pp. 1-6.

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