| 摘要 |
FIELD: drilling of oil and gas wells, applicable in drilling rigs with the upper drive of rotation of drill pipe string. SUBSTANCE: drilling rig includes derrick, derrick substructure, travelling block with spaced sheave sections, upper drive powered swivel with a guide dolly and device for taking aside of swivel from well center, guide beam and a complex of mechanisms of automatic device for round-trip operations of pipe string. Novelty consists in that drilling rig is provided with device hitching over of the upper end of drill stand. The device is made in form of beam with carriage mounted in guide of upper drive powered swivel and kinematically connected with its carriage. Installed on beams in fixing head having central hole in form of two cones facing each other with their small bases and connected with cylindrical belt. travelling block has centering device. Installed in hole of fixing head are spring-loaded cams of one-way action. EFFECT: higher efficiency. 6 dwg |
