WELL DRILLING RIG Russian patent published in 2007 - IPC E21B3/02 

FIELD: mine drilling equipment, particularly to drill all-purpose wells in underground openings.

SUBSTANCE: well drilling rig comprises drilling head, namely drilling tool rotator including hydraulic engine, reduction gear unit and rotation chuck. Device also has drilling head advancing hydrocylinders, which move drilling head along cylindrical guiders, rotary device and anchor posts. Device comprises load-bearing frame with rotation chuck installed on the frame. The rotation chuck is made of metal-roll, for instance of four parallel channel bars connected to two plates by channel bar ends. Cylindrical guider ends are fastened to the plates. One plate is pivotally connected to advancing hydrocylinder bodies. Conical pins of rotary device are secured to frame sides.

EFFECT: simplified structure and increased operational reliability.

3 dwg