BIT FOR REACTIVE TURBODRILLING Russian patent published in 1994 - IPC

Abstract RU 2023855 C1

FIELD: drilling of wells. SUBSTANCE: outer surface of extension is serrated. Maximum distance between lower generatrix of extension and lower point of rolling cutter tooth is found from relation l<H<L where l - difference between maximum and minimum height of bit measured in tooth space. Operation of bit provides for additional breaking of large sludge lumps. EFFECT: improved design. 3 dwg

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RU 2 023 855 C1

Authors

Zakharov V.V.

Rybalka A.A.

Liberman V.I.

Ospanov Zh.K.

Makarov N.G.

Porozov E.M.

Dates

1994-11-30—Published

1991-03-29—Filed