DRILLING RIG Russian patent published in 2006 - IPC E21B3/00 

FIELD: mining, particularly well drilling in hard difficult-to-drill rock.

SUBSTANCE: drilling rig comprises drilling rods, rotary means for drilling rod rotation, downhole hammer, delivery pneumatic cylinders, two telescopic spacing posts and drilling rod catching mechanism. The spacing posts have lower parts fixedly connected with each other by bracket and upper parts secured by load-bearing plates. The drilling rig is also provided with cross-arm and control-bars connected with the rotary means from the first control-bar sides and with cross-arm from the second sides thereof. The cross-arm is hingedly attached to delivery pneumatic cylinder rods having bodies fastened to load-bearing panel.

EFFECT: increased efficiency due to reduced size, possibility to drill wells in hard rock in small-size coal mines and improved reliability due to simplified structure.

2 cl, 4 dwg