DERRICK-AND-WINCH UNIT FOR DEEP WELL DRILLING RIG PREFERABLY USED FOR PRODUCTION WELL DRILLING Russian patent published in 2006 - IPC E21B15/00 

FIELD: oil and gas industry, oil machinery, particularly supports for the drilling machines, namely derricks or masts.

SUBSTANCE: unit has vertical long-stroke hydraulic cylinders having cases secured to base and rods hinged to heavy-duty trailers. Hydraulic cylinder control system has means to determine and maintain force applied to hydraulic cylinder rods. Caterpillar driving machines of heavy-duty trailers have independent electric drives. Additional horizontal hydraulic cylinders are provided between the base and heavy-duty trailers. The additional horizontal hydraulic cylinders provide independent caterpillar driving machine rotation. The base has supports bearing upon ground.

EFFECT: increased performance due to possibility of unit movement, leveling and rotation with the use of electrically-driven heavy-duty trailers in complicated environment.

2 cl, 6 dwg