JET CONE DRILLING BIT Russian patent published in 2001 - IPC

Abstract RU 2168600 C1

FIELD: drilling of oil and gas wells, particularly, drilling tools for rock mechanical disintegration. SUBSTANCE: drilling bit has body with legs connected thereto, cones installed on legs and nozzles whose axis are directed to well bottom. In this case, axis of outlet hole of one nozzle is directed at acute angle to well bore wall. Length of immersed jet from outlet hole of said nozzle up to contact with well wall is selected from equation L= (5-6)•dн, where L is length of immersed jet, mm; dn is diameter of outlet hole, mm. EFFECT: provided effective clogging of channels in bottom-hole zone of permeable formation tapped by drilling. 2 dwg

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RU 2 168 600 C1

Authors

Ishkaev R.K.

Kateev R.I.

Kateev T.R.

Kashapov S.A.

Starov O.E.

Dates

2001-06-10—Published

1999-12-20—Filed