METHOD TO CONSTRUCT HORIZONTAL OR INCLINED WELL IS FISSURED ROCK TO BE EXCAVATED BY DRILLING-AND-BLASTING OPERATIONS AND DRILLING RIG FOR ABOVE METHOD REALIZATION Russian patent published in 2006 - IPC E21B3/00 E21B19/24 

FIELD: mining, particularly to construct horizontal or inclined wells by rotary drilling in fissured rock with the use of rotary drilling rid and adapted to be used during exploration drilling in pits and mines for iron-ore mining.

SUBSTANCE: prior-art rig is provided with artificial head comprising a number of sections secured one to another and fastened to frame pivotally connected to support frame of drilling rig. The rig also has throttle located at drainage cavity of cylinder to provide drilling rig installation outside dangerous zone so that the drilling rig may be displaced in horizontal plane from drilling axis due to artificial head usage. The artificial head is installed on ledge extending from drilling rid to face along drilling axis and is assembled out of dangerous zone. The artificial head is provided with head string. Drilling assembly passes through the head string. Predrilling is performed in drilling regime at minimal advance speed. The advance speed is controlled by throttling of discharge cavity of advancing cylinder and at high rotational frequency for depth exceeding fissured rock zone thickness.

EFFECT: increased safety and productivity of horizontal or inclined well construction, reduced labor inputs for equipment movement and enhanced technological effectiveness of drilling operation, provision of drilling direction control and drilling rig arrangement at safe distance from slope, increased well construction capacity, extended functional capabilities.

2 cl, 4 dwg, 1 ex