DEVICE FOR EXTRACTING CONCRETIONS FROM SEABED Russian patent published in 2004 - IPC

FIELD: concretions extracting technology. SUBSTANCE: device has naval vehicle, extracting means with intake means and slime pump, force pipeline, and perforated branch pipe with openings diameters less than minimal size of extracted concretions. Perforated branch pipe is placed on extracting means adjacent portion of pipeline and is equipped with flanges. Diameter of perforated branch pipe lessens aside from extracting means in steps. Flange of each portion of inner diameter is made with conical slant towards lesser branch pipe diameter. EFFECT: lowered energy consumption, less powerful power supply is required, lesser size and cost of pipeline, better ecology in extraction zone, simplified manufacture of perforated branch pipe of alternating cross-section. 2 cl, 3 dwg