DEVICE FOR CLEANING WELL BORE FROM MUD AND ELIMINATION OF DIFFERENTIAL WALL STICKING Russian patent published in 2012 - IPC E21B21/00

Abstract RU 2443848 C1

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil and gas industry and may be used in wellbore sweep and elimination of differential wall sticking. Device comprises drilling pipe, single-start welded or solid auger with 4-6 flights. Auger vane inclination to drilling string axial line makes 45-75°. Jet nozzles arranged at 45-75° to drilling pipe axial line to the left along auger direction are fitted in auger vanes on every lead of screw.

EFFECT: higher efficiency and clearing, expanded performances.

1 dwg

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RU 2 443 848 C1

Authors

Lipatov Evgeny Yurievich

Kuznetsov Vladimir Grigorievich

Dates

2012-02-27—Published

2010-08-13—Filed