| 摘要 |
FIELD: oil and gas producing industry, particular, shooting-blasting devices applicable in pipe parting in wells. SUBSTANCE: well pipe cutter has cylindrical body 6 with side covers 5. Body accommodates explosive charge 1 with circular cumulative depression coated with facing 4 and initiators 2 and 3. Cover 5 has protrusion in form of truncated cone with its small base adjoining the cover. Thickness of cone equals thickness δof cover on the section from its edge to points of contact with cone. Length hof this section ranges from δto 2δ. Cone thickness δon the section with length hequals 1/6 of body internal diameter from point of cone contact with cover in direction to its center, and taper angle is selected from the relation given in the invention description. EFFECT: higher efficiency. 2 cl, 8 dwg |
