DEVICE FOR CLEANING WELL BOTTOM Russian patent published in 1994 - IPC

Abstract RU 2023856 C1

FIELD: drilling of wells. SUBSTANCE: device comprises drive of impeller 2 located in above-bit sub 4. Impeller 2 is arranged in nipple portion 3 of bit body. Body has a through channel. Blades of impeller 2 are set at an angle to horizontal plane, said angle varying from 90 to 180 deg. In operation, additional energy is imparted to washing fluid which improves cleaning of well bottom. EFFECT: improved design. 1 dwg

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RU 2 023 856 C1

Authors

Ospanov Zh.K.

Tsukalov A.I.

Brevdo G.D.

Pejsikov Ju.V.

Dates

1994-11-30—Published

1990-12-10—Filed