FIELD: oil and gas industry.
SUBSTANCE: tool (2) for ground breakage and extraction contains body (4), support surface (12) at working end (8) of the case including cavity (14) and side walls (16), insert (20), with tip (22), wedge-shaped face surface (26), lateral surface (28) and transitional edge (30) at crossing of face surface (26) and lateral surface (28) and ring (40) located radially outside protruding side walls (16). Transitional edge (30) and the most axially protruding surface (18, 42) along the axis of each side walls (16) and ring (40) are made as step-shaped backward configuration. The most forward and axially protruding surface (42) of the ring (40) is placed at axial distance D from tip (22) of the insert (20), while the most backward and axially protruding surface (56) of the ring (40) is placed at axial distance d from tip (22) of the insert (20), at that ring (40) is the most radially remote area of the tool (2) within interval D-d, at that the most backward and axially protruding surface (60) of the insert (20) is placed at axial distance L from tip (22) of the insert (20), where 0.5L≤D≤0.9L, preferably 0.5L≤D≤0.8L. Invention also describes machine for material extraction with installed tool (2) for ground breakage and extraction and method of tool (2) manufacturing.
EFFECT: increasing service life of tool.
13 cl, 4 dwg
