CENTRALISER FOR CASING STRING Russian patent published in 2011 - IPC E21B17/10

Abstract RU 2422615 C2

FIELD: oil and gas production.

SUBSTANCE: centraliser for casing string consists of hollow case made in form of two cylinder rings interconnected with centring elements. Flexible straps for turbulisation of rising flow of cement grout are arranged on cylinder rings at angle to their lengthwise axis.

EFFECT: raised quality of casing string cementing.

1 dwg

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RU 2 422 615 C2

Authors

Kopytov Grigorij Mikhajlovich

Kopytov Andrej Grigor'Evich

Dates

2011-06-27—Published

2009-08-20—Filed