Method for manufacturing blank material suitable for oil drillin

Details Method for manufacturing blank material suitable for oil drillin Method for manufacturing blank material suitable for oil drillin

1983-03-25

1984-09-18

Stallard, W.

Metal treatment

Compositions

Heat treating

148 124, C21D 900

Patent

active

044722079

ABSTRACT:
A method of manufacturing a blank for an oil drilling stabilizer, which includes the steps of hot-working a stock of non-magnetic steel into a rod-like shape work item with a bulging large-diameter portion at a median point between opposite ends thereof; subjecting the resulting rod-like work item to an ordinary heat treatment solution and a machining operation to obtain a semi-finished work item of a shape substantially conforming with the desired shape; and then subjecting the semi-finished work item to cold axial compressive working in a die cavity of a complementary shape and within a work hardening temperature range.

REFERENCES:
patent: 3489620 (1970-01-01), Current
patent: 3535910 (1970-10-01), Connolly
patent: 4131491 (1978-12-01), Joseph
patent: 4180421 (1979-12-01), Joseph et al.

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