Auxiliary workover rig

Material or article handling – Well pipe or rod racking mechanism – With slope change

Patent

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Details

52117, E21B 1914

Patent

active

044707398

ABSTRACT:
An auxiliary rig is used in combination with a primary drilling or workover rig. The primary drilling rig typically includes an elongated upstanding drill tower, a base and a crown block. The auxiliary rig of the present invention includes a racking tower detachably mounted with the upper end of the drill tower to form an extension to the drill tower for receiving interconnected pairs of tubular members to reduce the tripping time of the tubular members into and out of the well. A movable slip and a controller therefor of the auxiliary rig are operably guided by the racking tower for releasably supporting the pairs of tubular members.

REFERENCES:
patent: 848304 (1907-03-01), Hines
patent: 2690268 (1954-09-01), Woolslayer et al.
patent: 3177944 (1965-04-01), Knights
patent: 3708024 (1973-01-01), Back
patent: 3768663 (1973-10-01), Turner, Jr. et al.
patent: 3942593 (1976-03-01), Reeve, Jr. et al.
patent: 3949883 (1976-04-01), Crooke et al.
patent: 3960360 (1976-06-01), Elliston
patent: 3976207 (1976-08-01), Schultz
patent: 4230190 (1980-10-01), Guinn et al.

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