DEVICE FOR WELL DRILLING Russian patent published in 1994 - IPC

Abstract RU 2018617 C1

FIELD: land and off-shore drilling rings. SUBSTANCE: device has lower, upper and tackle hangers and bars interconnecting lower and upper hangers. Installed on bars for independent vertical motion are pipe holder, pipe rotary head with rotary drive of swivel and swivel which is capable of vertical motion and horizontal motion relative to device axis. EFFECT: higher efficiency. 3 cl, 3 dwg

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RU 2 018 617 C1

Authors

Litvinov A.I.

Dates

1994-08-30—Published

1992-06-05—Filed