METHOD OF TREATING STEEL PARTS OF OIL-FIELD EQUIPMENT Russian patent published in 1997 - IPC

Abstract RU 2077603 C1

FIELD: oil and gas production. SUBSTANCE: parts are preliminarily treated with beads 0.4-0.8 mm in diameter, subjected to nitrocementation at 500-600 C for 4-6 h and then to oxide formation effected by cooling parts after nitrocementation in water. EFFECT: increased resistance to fatigue destruction, corrosion, and wear. 1 tbl

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RU 2 077 603 C1

Authors

Istomin A.A.

Leshchinskaja Eh.P.

Suntsova T.N.

Fozekosh D.I.

Dates

1997-04-20—Published

1994-05-10—Filed