Extraction method of gaseous hydrated hydrocarbons from bottom of water reservoirs and device for its implementation

FIELD: mining.

SUBSTANCE: method consists in destruction of the bottom layer with sharp edges of buckets fixed on vertical conveyor belt; conveyor moves along the reservoir bottom by means of caterpillar drive relative to which the conveyor belt moves vertically with possibility of penetration into the bottom. At that, gaseous hydrate is lifted to the zone isolated from water with surface of turned-over funnel, where it is heated, and evolved gas subject to additional heating is transported to the surface by means of the hose fixed on the funnel top. Also, device for the method's implementation is proposed.

EFFECT: increase in production of gaseous hydrated hydrocarbons.

2 cl, 1 dwg

 

Now the present invention relates to the field of mining, located on the seabed.

The known method of gas hydrate production of hydrocarbons, which consists in the formation of thermal field in the lower layer of the geological structure using wells and the extraction of gas released from the upper reservoir [1]. The known method is not applicable in the marine environment.

There is a method of extraction of gas hydrates from the sea floor, which consists in raising them to the surface using a self-propelled harvester with controls, communications, mining and loading [2]. This method is used as a prototype for essential features.

The goal in the way that is solved in that the bottom layer ruin with sharp edges of buckets mounted on a vertical conveyor belt, moving across the bottom of the pool using caterpillar tracks, on which the conveyor belt moves vertically, with burial in the bottom, while the gas hydrate raise in an area isolated from the water surface inverted funnel, where it is heated, and the liberated gas is transported to the surface using a hose attached to the top of the funnel, exposing it to more heat.

The goal in the known device, containing self-propelled combina controls, communication, extraction and loading, the conveyor belt with fixed on her buckets and vessel maintenance is achieved in that the conveyor belt mounted for movement in a rectangular frame located in the dual vertical hole is perpendicular to the horizontal thruster on tracks, vertical side thereof rigidly connected with screw propellers, able to bury the lower end of the frame into the sediment to a depth of not less than 10-15 m

The upper end of the frame is rigidly fixed in the hole of the annular float on the top ring which is installed heaters, the outer edge of the ring connected to the bottom edge of the inverted funnel, the inner surface of which is covered with a heat insulator, and the top is connected through the valve and the heater hose to transport, leaving the surface, the valve is connected with an automatic restraint system the surface of the water inside the float at the level of its lower edge.

The possibility of realization

The drawing shows a Device for the extraction of gas hydrates from the bottom of the water basins", which implements the proposed method. The device includes: caterpillar mover - 1 moving over the bottom 2 with caterpillars - 3. Caterpillar propulsion perpendicular to its plane of screw propellers - 4 fixed frame 5, in which d is ijesa conveyor - 6 with the location of the bucket 7. Frame 5 can be moved up and down through a rectangular opening 8, in the case of propeller - 1. At the upper end of frame 5 is fixed to the float in the form of a ring - 9. Part of the conveyor belt - 6 passing through the hole of the float 9, gets in a closed volume, a limited conical (funnel-shaped) surface - 10. The inner surface of the cone is covered with the insulating material 11. The lower edge of the funnel 10 and the outer edge of the upper ring of the float 9 is firmly and tightly connected. On the upper ring of the float installed heaters - 12. At the top of the fixed cone valve 13 and the heater 14, after which attached transporting hose - 15.

Device for extraction of gas hydrates works as follows. With support vessel (not shown) the device goes down to the bottom of the basin, while the frame of the conveyor - 5 maximum raised above the horizontal thruster - 1. As a result, the mover stands on the bottom of caterpillars - 3. Next, the engines begin to work conveyor 6 and screw propellers - 4 (not shown). The cutting edges of the buckets - 7 destroy gas condensate together with the host rock and carry them into the inner volume of the funnel - 10. Inside the funnel heaters - 12 heat the condensate, and he goes into the gas phase. The gas displaces water from podkonicky surface - 10 down to the level of the lower edge of the float 9. The breed is moving in the bucket - 7 under the cone - 10, gives the gas and breaks down in developed buckets space. Reaching the lower boundary of gas condensate, screw propellers - 4 stop, and tracked propulsion begins to move in the direction of horizontal framing And passing a wide swath of the belt conveyor 16. The valve 13 by means of any type of sensors, such as ultrasonic, installed at the top of the cone, or conductivity, is installed on the lower ring of the float provides for the maintenance of the water surface on the lower level of the float and the output produced combustible gas through the hose 15 to the surface. Since the expansion of the gas, passing from a high pressure on the bottom (this can be hundreds of atmospheres) pressure-transporting hose is cooled immediately after the valve 13 is a heater 14, preventing the formation of ice in the hose - 15.

The presence of the float 9 is necessary to ensure sustainability of the system at large depths of gas condensate. In this case, frame height - 5 can reach hundreds of meters, and during the horizontal movement of the caterpillar conveyor frame may be removed.

Sources of information

1. Patent of Russia №2306410.

2. Patent of Russia №2004106857 from 20.08.05.

1. Method of production of the gas hydrate hydrocarbons from the bottom of the water basin, which consists in mechanical destruction of the bottom layer and the raising of decay products with the help of buckets on the conveyor belt, characterized in that the bottom layer ruin with sharp edges of buckets mounted on a vertical conveyor belt, moving across the bottom of the pool using caterpillar tracks, on which the conveyor belt moves vertically, with burial in the bottom, while the gas hydrate raise in an area isolated from the water surface inverted funnel, where it is heated, and the liberated gas is transported to the surface using a hose attached to the top funnel, subjecting it to additional heating.

2. The device for implementing the method according to claim 1, comprising a vertical conveyor belt with fixed on her buckets and vessel support, characterized in that the conveyor belt mounted for movement in a rectangular frame located in the dual vertical hole is perpendicular to the horizontal thruster on tracks, vertical side thereof rigidly connected with screw propellers, able to bury the lower end of the frame into the sediment to a depth of not less than 10-15 m, while the upper end of the frame rigidly for the Sol in the hole of the annular float, top ring which has heaters, the outer edge of the ring connected to the bottom edge of the inverted funnel, the inner surface of which is covered with a heat insulator, and the top is connected through the valve and the heater hose to transport, leaving the surface, the valve is connected with an automatic restraint system the surface of the water inside the float at the level of its lower edge.



 

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