| 摘要 |
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 |
