WELL-DRILLING DEVICE Russian patent published in 2005 - IPC

Abstract RU 2250343 C1

FIELD: mining industry.

SUBSTANCE: device has column of double drilling pipes, pilot chisel, expander with body, mounted on double drilling pipes column with possible axial displacement and combined rotation. It is provided with subs, made in form of additional double drilling pipes with outer profiled surface. Expander body is provided with spring-loaded stop for supporting subs. Expander with body is mounted with possible axial displacement and rotation by profiled connection. Expander body is provided with stabilizer. Expander and stabilizer are made detachable.

EFFECT: higher reliability.

3 cl, 1 dwg

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RU 2 250 343 C1

Authors

Kerimov V.A.

Bashkatov A.D.

Kerimov Gennadij Vaidovich

Kljukvin V.Ju.

Dates

2005-04-20—Published

2003-10-03—Filed