CONTINUOUS PUMP ROD MANUFACTURING METHOD Russian patent published in 2008 - IPC B23K31/00 B23K101/04 E21B17/22

Abstract RU 2321483 C2

FIELD: manufacture of continuous pump rods.

SUBSTANCE: method comprises steps of selecting from large number of initial rods in coils those rods that have similar uniform hardness along length and from coil to coil; welding adjacent free ends of initial rods in coils by fusion welding for producing continuous elongated rod; working each thermal influence zone in order to reduce non-uniformities caused by welding; coiling produced pump rod to coil.

EFFECT: improved efficiency of pump rod manufacture, lowered investment cost at keeping main properties of pump rods.

22 cl, 3 dwg

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RU 2 321 483 C2

Authors

Labonte David

Dzherelak Riki

Dates

2008-04-10—Published

2003-06-27—Filed