GEAR FOR DIRECTIONAL DRILLING OF HOLES Russian patent published in 2003 - IPC

FIELD: drilling of slant and horizontal holes with use of percussion machines. SUBSTANCE: given gear can find application in ditchless technologies for laying of service lines in complex geological structures. Gear includes body, striker with head and rod possessing eccentric protrusion on striking butt and rock-breaking tool placed uniaxially in body. Bushing with unbalanced mass joined to striker movably in axial direction is put uniaxially with striker on its rod. Invention ensures increased operational reliability thanks to equal strength cross-section of striker and enhanced unbalanced mass moment on striker owing to maximum possible displacement of center of gravity in pair " striker- bushing with unbalanced mass ". EFFECT: increased operational reliability of gear. 5 dwg