eans for generating pulsating fluid jets (E21C45/02)

E   Fixed constructions(158735)
E21C     ining or quarrying(17294)
E21C45/02                     eans for generating pulsating fluid jets(40)

ethane hydrate development method and device for its implementation // 2520232
FIELD: oil and gas industry.SUBSTANCE: method for development of methane hydrates is based on their breaking by water jets at a temperature of more than 285K with the rate more than 1 m/s in a pulse mode with a frequency in the range from 1 up to 200 Hz, gasification and lifting from the seabed. A device for development of methane hydrates contains a floating device, handling equipment, a power generating unit, pipelines, a control unit and an underwater methane hydrate development unit in which body there is an installed infrared heater, a water-jet monitor with pressurised water feed equipment and a gas bleeder.EFFECT: improvement of energy efficiency for underwater development of methane hydrates and their lifting to the floating device.2 cl, 1 dwg

Water jet nozzle // 2374448
FIELD: mining.SUBSTANCE: invention is related to treatment of item surfaces with water jet. Water jet nozzle comprises body with the first nozzle head arranged on its front end, besides axis of outlet hole in the first nozzle head in plane of front end of body has an angle of inclination to axis of body rotation and is displaced relative to axis of rotation, and the second nozzle head, arranged on body side surface, besides axis of outlet hole of the second nozzle head is inclined to axis of body rotation to the side of its front end. Body comprises device for flow interruption, which comprises disk made in the form of sleeve, bottom and side walls of which have slots in the form of sectors and small turbine that represents impeller made of hub and blade crown, for instance with four blades arranged at an angle to nozzle axis. Disk and small turbine are fixed on axis, which it in turn is installed in sliding bearings, one of which is fixed in nozzle body from the side of front end, the other one - in central part of support, having shape of ring with ribs of rigidity, with external radius equal to radius of bore, where it is installed. Support is fixed with threaded ring.EFFECT: improved efficiency of water jet nozzle due to dynamic action of pulsating water jets at material.4 dwg

The method of discharge of fluid in the mountain range and the device for its implementation // 2151877
The invention relates to mining and can be used for softening and moisturizing the mountain massif

Device for creating pulsations of pressure jet // 2138641
The invention relates to a device for generating pulses of a jet of liquid