DRILLING RIG Russian patent published in 2005 - IPC

FIELD: drilling equipment, particularly drilling rigs for rotary well boring with direct and back flushing.

SUBSTANCE: drilling rig comprises boring pump having delivery hose; compressor, rotor with slurry pipeline, drill and driving pipes arranged concentrically one with another and distributional swivel. The rig is provided with sub arranged between driving pipe and distributional swivel made as double drill pipe with drain connection and annular partition dividing sub into lower slurry conduction cavity and upper cavity. Upper cavity communicates with inner pipe. The cavities communicate with drain pipe through shutoff means. Delivery hose is connected to compressor and has check valves.

EFFECT: increased efficiency of well boring due to provision of optimal flushing regime and system.

3 cl, 1 dwg