DEVICE FOR WELL DRILLING Russian patent published in 1996 - IPC

Abstract RU 2054517 C1

FIELD: mining industry. SUBSTANCE: device for well drilling has circular holder to which hinges are connected. Holder and body are splined jointed to each other. Stop is made in form of ring. Pushers are located in body radial channels and spring-loaded to be returned to transportation position. Collar is installed in body axial channel, and hollow is filled with oil. EFFECT: higher efficiency. 3 dwg

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RU 2 054 517 C1

Authors

Petrov N.A.

Mukhametshin M.M.

Dates

1996-02-20—Published

1993-02-11—Filed