Welded oil well pump rod

Details Welded oil well pump rod Welded oil well pump rod

1984-05-04

1986-06-10

Kundrat, Andrew V.

Joints and connections

Screw or cam

403271, B25G 300, F16B 718

Patent

active

045940207

ABSTRACT:
A wrought aluminum alloy well pump sucker rod is formed using a cylindrical rod section and separately fabricated coupling end portions which are friction welded to the cylindrical rod section at friction welding speeds and forging pressures sufficient to produce an excess amount of radially displaced material or flash in the weld zone. The increased cross-sectional area of the rod formed by the displaced material results in lower unit stress in the transition zone between the cylindrical rod section and the enlarged diameter coupling portions.

REFERENCES:
patent: 1236145 (1917-08-01), Burns
patent: 2257335 (1941-09-01), Evans et al.
patent: 2690934 (1954-10-01), Holcombe
patent: 3489445 (1970-01-01), Kammerer, Jr.
patent: 4096787 (1978-06-01), Sandau et al.

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