DOWNHOLE REAMER Russian patent published in 2008 - IPC E21B7/28 E21B10/26

Abstract RU 2315849 C1

FIELD: drilling equipment, particularly drilling devices to drill deep oil, gas and water wells from under casing pipe shoe, namely for enlarging drilled holes.

SUBSTANCE: downhole reamer comprises pilot drill bit, body, connection clutch movably installed on the body and rock-cutting tools. Rock-cutting tools are arranged in support windows of connection clutch and side body grooves having guiding means. Body is made as drive liner. Connection clutch is suspended to the body by means of sub and is secured to pilot drill bit.

EFFECT: increased efficiency and extended field of application.

3 cl, 1 dwg

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RU 2 315 849 C1

Authors

Kerimov Vaid Amirdzhanovich

Kerimov Gennadij Vaidovich

Dates

2008-01-27—Published

2006-06-13—Filed