Installation for shelf drilling and method for shelf drilling

FIELD: mining.

SUBSTANCE: group of inventions relates to mining and can be used for shelf drilling. Installation for shelf drilling comprises a platform, such as a ship, pontoon, self-lifting drilling rig, and a drill string connected with said platform to transfer driving force and is additionally equipped with a heaving compensator. On lower end drill string is equipped with a drilling bit, and to platform is suspended bottom support plate, configured for arrangement on sea bottom. On bottom support plate there are clamps for attachment to drill string, which is a collet, designed to clamp drill string, preventing its rotation. Collet has a body resting on bottom support plate and equipped with wedge clamps. Wedge clamps are connected with said body to rotate. Also disclosed is a method of shelf drilling.

EFFECT: technical result consists in improvement of reliability and efficiency of shelf drilling.

28 cl, 4 dwg

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: according to the method upper layer of gas hydrate mass is melted gradually by heating gas hydrate mass in bottom sediments of a water body up to temperature of 50-60°C. Heating is made by a heating element made as blade edge located along diameter of a cargo container lowered from a flotation device. The flotation device is made as a mobile underwater vehicle with retractable tract in the form of a container equipped with blade edge in the bottom part connected to heating elements inside container. Stability of the mobile underwater vehicle is endured in regard to the bottom of the water body. Container is rotated and electric current is supplied to heating elements. Gas hydrate stratum is heated up to 50-60°C. The container is lowered with rotation to the gas hydrate stratum with provision of single-point recovery of hydrates from the above stratum in solid state.

EFFECT: reduced material and operational expenditures and ecological consequences at gas hydrate extraction territory.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes production of gas hydrates, their transportation to a consumer and decomposition of gas hydrates with gas recovery. Gas hydrate recovery process is implemented at thermodynamic parameters corresponding to formation of gas hydrates. Transportation of gas hydrates is performed in sealed and heat insulated cargo spaces of a vehicle at thermodynamic parameters excluding decomposition of gas hydrates. Decomposition of gas hydrates with gas recovery upon completed transportation is made by reduction of pressure in cargo space of a vehicle up to atmospheric pressure. Process of gas hydrate recovery and their storage during transportation is carried out at temperature of -0.2°C and pressure of 1 MPa. At that gas hydrates are withdrawn in hydrate state as briquettes by n-containers run down in sequence to submarine reservoir of gas hydrates from a submarine vehicle. The submarine reservoir of gas hydrates is heated up by heating elements located at edges of n-containers. Each n-container is buried in sequence to submarine reservoir of gas hydrates to the depth twice exceeding the container height. Upon loading of each n-container by free falling of gas hydrates they are loaded to cargo space of a vehicle. The vehicle is made as a submarine vessel. While heating submarine reservoir of gas hydrates only reservoir section under the container is heated. Containers are filled with gas hydrates represented by briquettes of natural metastable mineral in hydrate solid state.

EFFECT: improving efficiency in recovery and transportation of gas hydrates due to reduced consumption of energy and reduced capital and current costs.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: method comprises mechanical destruction of seafloor layer by an stripping knife moving along the seafloor, and transportation of destruction products to the surface. The products of destruction are placed in elastic, gas-tight shells, which are collected along the surface and transported them to the place of use in the transportation vessel refrigerators. The combine is a moving platform with a knife for seafloor cleaning with the mounted video camera and the stripping knife under the hole in the platform designed as a horizontally rotating cylinder with the scrapers mounted on it. The platform has two mounted cylinders, the first is a container with shells located horizontally one above another one, and the second one, mounted above the hole, is a loading container in the top side of which the segments with drive mechanisms shifting them from the cylinder axis are located.

EFFECT: improvement of efficiency of ocean production of gas hydrates.

4 cl, 2 dwg

FIELD: mining.

SUBSTANCE: device comprises a clamshell ladle fitted with levers with bosses and flexible links, a sensor, a flexible cavity, a float. The device is also fitted with the vessel designed as a bent cylinder with the tapered extended cylindrical part which is inclined to the opposite side from the self-contained unit and through the frame is interconnected with it. The vessel is fixed on a cable with a possibility of vertical movement. The extended cylindrical part of the vessel is fitted with a sensor interacting with a sensor located in the container under a flexible cavity which is filled with liquid with a specific gravity, less than that of environment. The unloading hole of the extended cylindrical part of the vessel is fitted with the throwing-back tray. The distance from the clamshell ladle centreline to the tray in the thrown-back situation and distance from the lower edge of the clamshell ladle to the tray in the thrown-back situation are determined by the mathematical relations given in the description.

EFFECT: improvement of efficiency of underwater development of minerals.

5 cl, 3 dwg

FIELD: mining.

SUBSTANCE: device comprises a delivery pipe for supply of minerals designed from top to bottom with a bell and a pipeline for coolant supply. The delivery pipe is designed as variable section pipe with formation of alternating cylindrical compartments with inlets and outlets, and the top parts of some compartments are arranged with inclination as cross-lying with reference to other compartments, and the lower parts of compartments are designed conical, interconnected with coolant supply pipelines. Outlets of compartments are located from inlet holes at the distance necessary for passing and maintaining of soil and ice bodies in a suspension provided that: L≥3·dmax, where L - is the distance between inlets and outlets of compartments, dmax - maximum diameter of soil and ice bodies.

EFFECT: improvement of efficiency of production of minerals from continental shelf.

1 dwg

FIELD: mining.

SUBSTANCE: device includes a conveying capacity in the form of a grab bucket provided with levers with thrusts and flexible links, a start sensor located in a container and a flexible cavity. The latter is filled with liquid with a capsule located in it and containing reagents. A capsule throw valve is located at the top of the flexible cavity. Radio beacons are fixed inside the container, on its side walls, and coupling rings are located on the outside. Sodium chloride (3%) and sodium hypochloride (0.3%) are used as reagents.

EFFECT: improving efficiency of operations.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: device includes a grab bucket with armoured jaws and flexible links by means of which the bucket is connected to a gas generator and to a flexible cavity start-up sensor, which are located in a container, and a float. The grab bucket is made from elastic material, and a flexible cavity is equipped with a cable located inside the cavity in the centre, the lower end of which is attached to a partition wall additionally installed between a gas generator and the flexible cavity, and the upper end of the cable is attached to the float. As the elastic material of the grab bucket there used is for example thermopolyutherane. The upper edge of the grab bucket is perforated. Armoured jaws of the grab bucket are provided with holes uniformly distributed throughout the surface area. A full air discharge valve is located at the top of the flexible cavity. The float is made in the form of a radio beacon.

EFFECT: improving efficiency of operations.

6 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: system contains at least one modular shaft with the central unit placed under water and an uprise buried to the ocean bottom and at least one air-lock chamber to transport duty shifts of workers, materials and equipment. Besides the system comprises at least one drilling area with a horizontal tunnel branched from the uprise in the central unit, and an inclined area for delivery of drill pipes and a vertical area in which bottom part there is a wellhead of at least one well. A power cable and control systems as well as pipeline in the protective shell for oil and gas transportation are connected to the modular shaft.

EFFECT: increasing development efficiency of subsea oil and gas deposits.

9 cl, 56 dwg

FIELD: mining.

SUBSTANCE: proposed device comprises mineral feed pipe aligned inside hollow pipe with funnel at its bottom, and coolant feed pipeline. Additionally, this device comprises coolant feed pipelines distributed uniformly over hollow pipe perimeter, in funnel walls and in extra struts of said funnel. Hollow pipe is located at the level of funnel strut. Funnel strut inner walls are perforated. At the level of funnel, hollow pipe has vertical cut-outs furnished with plugs from top and bottom. Funnel strut top parts are also equipped with plugs.

EFFECT: continuous mining, lower power consumption and extraction costs, minimised negative effects on contamination of environments.

2 cl, 2 dwg

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

FIELD: mining.

SUBSTANCE: invention relates to geological survey and production of minerals, particularly, to deep-water drilling. Proposed rill rig comprises structural tank filled with water and communicated with atmosphere to support drill rod with drill crown bit, feed drive including hydraulic control valve and drive of rotation composed of spinner hydraulic motor with inlet communicated with ambient medium via spinner hydraulic motor hydraulic control valve, electrically driven hydraulic pump communicated with pickup of water level in said tank, and throttles. Feed drive is composed of feed reduction gearbox, feed hydraulic motor, feed hydraulic motor hydraulic control valve, toothed rack and pressure gear. Controlled throttles are arranged in parallel and in series with feed hydraulic motor. Spinner hydraulic motor outlet is communicated via its control valve, throttle arranged in series with feed hydraulic motor and its control valve, with aforesaid tank while, via throttle arranged parallel with feed hydraulic motor inlet.

EFFECT: drilling depth independent of hydraulic motor parameters, reduced water flow rate, distributed pressure difference between feed and spinner hydraulic motors.

FIELD: oil and gas production.

SUBSTANCE: device consists of drilling device on sea bottom pressure tight closed form environment. The device is filled with fluid and is equipped with the separator for separation of material from fluid.

EFFECT: reduced pollution of environment.

6 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: bottom esturial platform includes the base of the support, on which guide branch pipe, funnel, guide rope which is passed through guide pulleys of support are fixed. On the basis of support there rigidly fixed are propelling screws which are connected to the unit of control system, to the input of which signal is supplied from gyro transmitter of position of platform axis, and output signal is supplied to hydroacoustic receiver-transmitter; at that, power of propelling screws is supplied from storage batteries located on the base of the support.

EFFECT: orientation of platform as to ship during submersion and accurate installation of platform to the specified drilling point.

5 dwg

FIELD: oil and gas production.

SUBSTANCE: invention is related to drilling of oil and gas wells on sea bottom, namely, to drilling rigs. Drilling rig is installed on sea bottom for drilling of oil and gas wells and is controlled remotely from surface vessel along pipes and signal cables. Main design of drilling rig is arranged from two cylindrical structures, with which several hoppers are connected for storage of drill tube racks. The whole drilling module may be lowered and extracted through hatch in upper part of the first cylindrical structure. Drilling rig is installed on foundation frame by means of hydraulic stands. Besides, installation is equipped with cylindrical skirt made with the possibility of adhesion with response cylindrical structure on foundation frame. Cylindrical skirt surrounds anti-emission preventer for prevention of environment pollution.

EFFECT: reduced labour intensiveness for transportation and maintenance of drilling rig during operation.

4 cl, 5 dwg

FIELD: mineral recovery from sea bed, particularly underwater well drilling equipment.

SUBSTANCE: drilling rig has support vessel filled with water, pump with electric drive installed on the vessel, water level sensor used to determine water level in the vessel, drill rod with drilling bit, hydraulic cylinders for supply mechanism, hydraulic drive for rotation unit, drill rod rotation control distributor, drill rod feeding control distributor, drill rod feeding control throttle, drill rod rotation control throttle and control system to exercise control over working operations. The drilling rig is provided with check, reducing and selector valve. The vessel is composed of two cavities. One cavity is filled with water and air, another one is filled with air. Air spaces of both cavities are communicated through check valve and through serially connected selective and reducing valves.

EFFECT: extended capabilities of the rig, provision of operational independence and increased depth available for rig operation.

1 dwg

FIELD: survey and mineral extraction from sea bed, particularly for underwater borehole drilling.

SUBSTANCE: device has support vessel filled with water and communicating with atmosphere and pump with electric drive installed on the vessel. The device also has water level sensor to determine water level in the vessel, drill rod with drilling bit, hydraulic cylinders for supply mechanism, hydraulic drive for rotation unit, drill rod rotation control distributor, drill rod feeding control distributor, drill rod feeding control throttle, drill rod rotation control throttle and control system. Device is provided with vertical and horizontal nozzles arranged on bottom and side surface of the support vessel, flow distributor adapted to control nozzle opening and closing and position sensor used to determine device position relative sea bed. Nozzles are linked with the vessel through above flow distributor, which is connected to pump outlet and to water level sensors and position sensors through control system.

EFFECT: provision of device self-movement at the command supplied from control unit or in accordance with stored program.

1 dwg

The invention relates to the field of exploration carried out on the bottom of the waters

The invention relates to the field of exploration and production of mineral resources on the seabed, and in particular to underwater drilling

FIELD: mining.

SUBSTANCE: self-lifting drilling rig includes supports made in the form of shaped structures, two of which are made in the form of single supports equipped with ice deflectors, and one support is made of two parallel supports located at some distance from each other and fixed on a riser base and is equipped with a riser ice deflector. A drilling zone passing through the support made of two parallel supports located at some distance from each other is equipped with drill strings. Ice deflectors and the riser ice deflector, which have positive buoyancy due to ballast tanks built into them, are installed with a possibility of sliding along single supports and the support made of two parallel supports located at some distance from each other and with a possibility of being fixed on them. The riser ice deflector is provided with a movable protective plate with holes for drill strings, which can be slid along the support made of two parallel supports located at some distance from each other so that a closed air cavity is formed around the drill strings on a water line level for supply into it for example of steam from the housing for example via a flexible pipeline for protection of the drill strings against ice formation during ice influence periods.

EFFECT: drilling rig is arranged on a housing in the centre of the support having two parallel supports located at some distance from each other with possibility of being moved between drill strings to increase the range of possible operation depths.

6 dwg

FIELD: mining.

SUBSTANCE: underwater drill rig comprises a drilling module with a drill floor, bearing base, cassettes with pipes and tool/equipment. The cassettes are arranged under the drilling module and can be replaced as pipes and tools/equipment are used. The drilling module is fixed on the bearing base and is fitted with the device for its filling with a neutral gas or gas with the decreased oxygen content with the pressure equal to overboard one. The drilling module is fitted with a wellhead funnel located at the centre, and necks for feeding of pipes and tools. The cassettes are located under the drilling module shifted from the centre and directly under the necks for pipes feeding.

EFFECT: simplification of design of underwater drill rig and increase of speed of feeding of pipes and drilling tools, equipment to a hole mouth.

3 dwg

FIELD: construction.

SUBSTANCE: versions are disclosed regarding implementation of designs of a gravity foundation, which comprises the first and second extended foundation sections divided with an open area and made as capable of maintaining weight in water for the specified structure and resting against the bottom of the water area, and an upper section arranged above the specified open area and made as capable of passing at least partially above water surface to maintain the upper structures. Some versions of implementation additionally contain the first and second inclined sections, which connect foundation sections with the specified upper section.

EFFECT: improved design.

20 cl, 8 dwg

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