DRILL BIT FOR CONTROLLED DIRECTED BORING, BORING SYSTEM AND METHOD OF BORING OF CURVED WELL SHAFTS Russian patent published in 2014 - IPC E21B7/06 E21B10/26 

FIELD: process engineering.

SUBSTANCE: invention relates to boring tool and can be used in inclined boring of wells. Drill bit body comprises rear end, guide section and boring section. Note here that rear end can be articulated with drill string. Guide section is arranged on drill bit drive end opposite the drill bit body end. Boring section is arranged between drive end and rear end. Note also that rear end, guide section and boring section are integrated in drill bit body. Note that guide section includes at least one device to control drill bit guide section and, thus, to control the drill bit entire section. Besides, drill bit body includes stabiliser ring coupled with boring section to control guide section displacement relative to rotational axis. In compliance with another version, well site system is created to include drill casing, guide drill pipe connected with drill casing and drill bit body described above. Also, invention covers the boring of well curved shaft in underground formation using the above described drill bit body and well side equipment system.

EFFECT: possibility to repulse the drill bit assembly to deflect well path in limited space.

34 cl, 9 dwg