DRILL RIG Russian patent published in 2015 - IPC E21B3/00 E21B15/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the drill rigs with movable rotation unit used during exploratory drilling. The drill rig includes base with quadrihedral mast, elevator carrying movable no-go rotation head with hydraulic cartridge and possibility of extension from the well axis to the accumulation point, and drilling stands connected to and disconnected from string, stands contain one pipe, turnaround device with automatic stand clamping by its top end at the moment of reception from the rotation unit, and stationary pipe holder. Under the first option on one sides of the mast , and under the second option on its rare side the second elevator is installed carrying movable pipe holder-maker. The mast base is made with possibility of rotation under the first option by 90° to one and another direction, and under the second option - by 180° to one and back direction. Under the first option of the mast design the two turnaround devices are used, they are installed against the mast sides. Under the second option of the mast design one turnaround device is used, it is installed against mast rare side. The stands turnaround device is equipped with the device ensuring the stand extension from the regular cell to the height necessary for its clamping by the hydraulic cartridge of the elevator by its top end during the string running, and stand reception and lowering in the cell after release from the hydraulic cartridge of the elevator during the string lifting.

EFFECT: invention ensures increased drilling capacity, accelerates process of the string length adding.