Method of producing a coupling for oil country tubular goods

Details Method of producing a coupling for oil country tubular goods Method of producing a coupling for oil country tubular goods

1993-09-14

1994-11-15

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

29557, 166242, 2653322, 2653323, B23P 1700

Patent

active

053635450

ABSTRACT:
Producing a coupling for oil country tubular goods having a metal seal and a screw thread tapered toward its end. A plain pipe is cut to a predetermined length and hot-forged with longitudinal compression to form a predetermined thickened shape of its inside surface. After quenching and tempering, the outside surface of the pipe is machined, and the inside surface is machined and is then threaded. The pipe is coated or plated.

REFERENCES:
patent: 2110779 (1938-03-01), Texter
patent: 2111196 (1938-03-01), Texter
patent: 2313861 (1943-03-01), Caldwell
patent: 2532632 (1950-12-01), MacArthur
patent: 3015500 (1962-01-01), Barnett
patent: 4026583 (1977-05-01), Gottlieb
patent: 4770444 (1988-09-01), Hauk
patent: 4974882 (1990-12-01), Watts

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