Steam cutoff device for underground well in thermal-mining development of oil fields

FIELD: oil and gas industry.

SUBSTANCE: steam cutoff device includes a housing hydraulically connected to the wellhead, a main exhaust valve whose seat is installed in the bottom of the housing, and a float actuator of the exhaust valve. The cutoff device is provided with an additional exhaust valve, the seat of which is also installed in the housing bottom, the valve locking elements being arranged with the possibility to be sequentially opened into the housing by one float actuator. The float actuator of the exhaust valves is made in the form of a console hinged in the housing with the possibility of moving the cantilever in the vertical plane, at the free end of which the float is fixed, wherein the discharge valves are installed on opposite sides of the console. A rod, on which thrusts rigidly connected with the locking elements are freely mounted, is installed and rigidly fixed perpendicular to the console. The thrust length of the additional exhaust valve shutoff element is larger than the thrust length of the main valve shutoff element, each valve shutoff element being made with a guide shank on the bottom, whose length is larger than the full stroke length of the shutoff element.

EFFECT: improved operation reliability of the cutoff device.

3 dwg, 1 ex

 



 

Same patents:

The invention relates to the oil and gas industry and is designed to improve oil recovery

The invention relates to the field of Earth science, in particular to the production of oil or gas, and can be used for further extraction of oil or gas using elastic migration geoeffective and cavitation in the fluid containing rocks at depths of 15 km and more

FIELD: oil and gas industry.

SUBSTANCE: steam-gas generator for production of oil and gas condensate comprises a closed cabin with steam-gas generator mounted on the gate connected in series to adapter, tubing head, adapter and casing head of the injecting well at the deposit. Besides the generator comprises gas turbine with ejector and regenerator, piston-type compressor, electric board and electric generator coupled to gas turbine. At that the closed cabin with a door and lifting eyes comprises radiator and blower with electric motor in order to cool cooling fluid in combustion chamber of the steam-gas generator, supports with retractable rods for mounting at concrete base, water and fuel tanks placed at the cabin walls, gate couple at one side to piston-type compressor and on the other side to regenerator air duct, gas turbine placed at the cabin roof. The steam-gas generator comprises combustion chamber complete with a jacket for recirculation of cooling fluid in space between walls, with a cover and inlet valve for compressed air heated in the regenerator up to temperature of 600-700C, outlet valve for discharge of exhaust gas to ejector and gas turbine with outlet pipe connected to inlet pipe of the regenerator or to outlet valve with tube. At that the valve gear includes a cylinder with valve piston and spring having a channel for inlet under the valve piston of compressed air from receiver equipped with return valve coupled to the piston-type compressor. Cylinder has openings for discharge of combustion products into circular cylindrical channel with nozzles installed there for injection of water and generation of stream-gas mixture. The combined nozzle comprises a body with tubes to deliver electrically conducting fluid, which are connected to cylindrical channels placed inside the body in the layer of electrically insulating material in parallel to fuel nozzle; at one side of the tubes there are electrodes connected to pulse generator and on the other side there nozzles directed at angle towards each other and interconnected by blasting chamber of the nozzle with orifice. At that regenerator for compressed air heating is made with start-up fuel nozzle, blower and electric motor.

EFFECT: increased oil recovery of the deposit reservoirs.

6 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the field of oil industry and can be used for enhanced oil recovery of the reservoir in the development of water-flooded reservoirs with viscous oil and bitumen at a late stage of development. The method comprises opening the reservoir with the ability to transfer the production well into the injection one, the reservoir processing, keeping the hole without any influence, intake of oil from the reservoir. At that a system of microwave electromagnetic generators with radiation frequency of 2.5 GHz is lowered into the injection well, connected to the slot antenna using the feeder. The length of the slot antenna is selected equal to the thickness of the aquifer of the reservoir. In the mode of injection, the water injection into the reservoir is carried out with simultaneous influence on the reservoir with microwave electromagnetic field, the radiation power is determined by the time of heating of the water injected in the downhole to the desired temperature. When filling 5-10% of the volume of the pore space of the formation, the well is maintained, the well is transferred into the production well, and the liquid intake from the production well is carried out.

EFFECT: increase of the effectiveness and economical efficiency of development of water-flooded reservoirs of high-viscosity oil, intensification of oil production in water-flooded reservoirs of high-viscosity oil by increasing the coverage with influence to the reservoir with heating in the bottomhole area of the reservoir of the production wells.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: in a development method for a deposit of high-viscosity oil or bitumen including construction of the upper injector and the lower producer with horizontal sections placed one over the other the above sections are equipped with filters, at that a pipe string of a pipe-in-pipe type with inner spaces isolated from each other by packers is run down to the injector while output openings of the pipe strings are placed in the filter and spread along the length of the horizontal section dividing it into heating zones, injection of a heat carrier through the horizontal injector with the stratum heating, creation of a steam chamber and extraction of the product through the horizontal producer, at that thermograms of the steam chambers are recorded, the heating state is analyzed regarding the evenness of heating and availability of temperature peaks, considering the obtained thermograms even heating of the steam chamber is made by changing the heating zones and delivery of a required quantity of the heat carrier to the respective pipe string in order to exclude the breakthrough of the heat carrier to the producer through the most heated zone, at construction of the injector with a horizontal section for evener heating of the stratum the filters and pipe strings are made with an increased total cross-section area of the openings from the beginning of the horizontal section in the stratum towards the bottomhole. During operation upon a 3-5 time increase in viscosity of the extracted product injection of the heat carrier to the injector is stopped and a gaseous hydrocarbon solvent is injected through the respective pipe string to the heating zone with the least temperature until the temperature of the extracted product is reduced per 10-25%. Thereafter injection cycles of vapour and gaseous hydrocarbon solution to the respective heating zones and product extraction are repeated.

EFFECT: enabling continuous control over the change in viscosity of the extracted product, potential regulation of the injection process, even heating of the stratum, increased output of high-viscosity oil and bitumen with the simultaneous reduction of material costs and energy consumption.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of high-viscosity oil field production with horizontal wells involves drilling of two horizontal wells, injector and producer, in the oil reservoir thickness. Producer is positioned below injector level, steam is injected to the injector and oil is swept from producer, presence of bottom water is checked, and if present, minimum height of producer path above water and oil interface, optimum distance between producer and injector, minimum distance from injector to formation top, and optimum thickness of oil reservoir allowing for parallel position of the producer and injector in the same vertical plane are determined, and if oil reservoir thickness drops below the optimum, injector drilling path in the oil reservoir space against the producer is modified by reducing the vertical distance between the wells, and injector is lead away from the producer in horizontal plane with account of reservoir anisotropy, preserving permeability gradient between the injector and producer.

EFFECT: enhanced efficiency of thermal effect on field with low constant and variable thickness of oil reservoir.

2 tbl, 1 ex, 3 dwg

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 50-60C. 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 50-60C. 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 -0.2C 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: oil and gas industry.

SUBSTANCE: under method the first device is installed in the horizontal well. Firth fluid is injected in the first horizontal well via the first device. HCs production is ensured from the second horizontal well under the first well. Second fluid is injected to the third well shifted to side from the first and second wells to displace fluids in the reservoir to the second well. At that HC production from the second well is continued. Hydraulic connection is ensured between the first, the second and the third wells. Pressure in the first well is increased using the second fluid injected to the third well. First well is closed when its pressure is increased by the second fluid to pressure sufficient to displace HCs from the second well during HCs production.

EFFECT: increased method efficiency.

29 cl, 10 dwg

FIELD: oil and gas industry.

SUBSTANCE: during execution of the thermoshaft method of high viscous oil production including vapour injection in the oil reservoir, and oil extraction via the production wells, according to the invention the lower layer of the oil reservoir is developed by several horizontal wells drilled from the drilling level of the oil reservoir, steam injection in the lower layer of the reservoirs via the underground system of steam supply, at that the horizontal wells are developed under steam cycle mode, and the underground steam supply system of the further horizontal wells are connected after development of the previous and switching of part of the horizontal wells to the production mode.

EFFECT: creation of the method of high viscous oil production ensuring increased extraction coefficient of the crude oil due to uniform heating of the oil reservoir through height at minimum heat losses per oil production.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves installation of oil-well tubing string with well sucker-rod pump in a well. Additionally, the string features a liner with filter, heating cable along external surface from wellhead to the well sucker-rod pump, capillary well pipeline from wellhead to a depth below the well sucker-rod pump, entering inner space of the liner. Well operation involves simultaneous product extraction through oil-well tubing string by the well sucker-rod pump. Electric current runs over the heating cable. Mix of Intat asphaltene, resin and paraffin sediment solvent and Rekod demulsifier is injected via capillary well pipeline. Demulsifier to solvent ratio is (1:18)-(1:22). Cable with maximum heating temperature up to 105C and maximum power up to 60 kWh is used as the heating cable.

EFFECT: enhanced efficiency of viscous oil emulsion production.

1 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of high-viscosity oil well development and operation involves landing of tubing string with well pump with power cable to the well, and landing of capillary tube parallel to the power cable and attached to external surface of the tubing string by clamps. Oil or oil-containing reservoir fluid is produced. Chemical reagent is injected to the well from a tank by a metering pump through the capillary tube. Power cable is inserted to the well through cable gland. Power cable and capillary tube are protected against direct contact with internal well surface by protectors. Electric heater with extension unit, well pump with power cable and sleeve with radial hole to which the capillary tube is connected are inserted into the tubing upwards from the bottom at the wellhead. Electric heater extension unit is connected to the power cable of well pump. The tubing is landed to the well so that its shoe is located at least 2 m lower than bottom of high-viscosity oil reservoir, and electric heater is facing perforation interval of the high-viscosity oil reservoir. At the wellhead, power cable is connected to well pump and electric heater control stations and inserted to the well through cable gland. Capillary tube is inserted to the well through sealed side tap of the well X-mas tree. Electric heater is actuated, and a process break is made for 8 hours to heat bottomhole zone of reservoir in the perforation interval and high-viscosity oil heating at the inlet of well pump. After the process break, well pump is launched simultaneously with the metering pump supplying high-viscosity oil flux via the capillary tube through the radial hole in the sleeve to inner space of the tubing above the well pump.

EFFECT: enhanced well yield, reduced load in the well pump.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes drilling of well and following concurrent heat treatment of productive bed and treatment by pressure waves. Well is drilled in parallel to ceiling or soil of bed. Acoustic properties of system ceiling-bed-soil are examined. Bed oscillation frequencies are determined. Acoustic characteristics of system ceiling-bed-soil are determined and concurrently heat and pressure waves treatment is performed in frequencies range containing spectrum of frequencies in resonance with frequencies of bed oscillations. Length of well is selected divisible by integer number of waves, direction of which is perpendicular to ceiling or bed soil, appropriately to analytical relation.

EFFECT: higher efficiency.

5 cl, 1 ex, 1 tbl, 2 dwg

FIELD: mining industry, applicable in opencast mining of mineral resources and hydraulic engineering.

SUBSTANCE: the method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product.

EFFECT: provided optimized destruction of the rock in opencast mining of mineral resources and in building blasting operations.

3 cl

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes inputting working environment under pressure along thermo-isolated pipeline into oil-bearing bed and extracting oil to the surface through inputting pipeline. As working environment easily-boiling liquid is used. It is fed along force thermo-isolated pipeline with reduction assembly and sprayer at end. Easily-boiling liquid is fed under pressure, enough for dispersing easily-boiling liquid on smallest drops and forming a foam of bubbles of easily-boiling liquid and oil from bed. It is fed into inputting pipeline placed coaxially outside force pipeline. Mixture of steam of easily-boiling liquid and oil is extracted to surface. Mixture is separated, oil is gathered, and steam of liquid is condensed for repeated use in well.

EFFECT: higher efficiency.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has force and product pipelines, column of thermo-isolated pipes, steam generator. Steam generator is made in form of system for feeding easily-boiling liquid. Said system contains thermo-isolated force pipeline with reduction assembly for adjusting amount and pressure of easily-boiling liquid and sprayer. Sprayer serves for dispersing easily-boiling liquid on smallest drops and forming foam of mixture of bubbles of easily-boiling liquid steam and oil from bed. Also provided is compressor for raising foam, cooling machine for transferring steam of easily boiling liquid to liquid state. Inputting pipeline is placed coaxially outside the force pipeline. Output of input pipeline is connected to separator input, and separator output - to cooling machine input.

EFFECT: higher efficiency.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling two-mouth horizontal well, fixing thereof by operation column, dragged from one mouth along shaft to another mouth together with packers for mounting the latter in ceiling of productive well, raising and feeding oil to output line on one of well mouths. Mouth portions of operation column are interconnected by ground-based portion in form of arced pipeline with identical inner diameter with forming of closed channel. Said ground-based portion of the latter is fixed on support frame of driving assembly. For it an additional column is placed in operation column, performing a function of tubing pipe in underground portion and having perforation channels for connection to productive layer. In hollow of additional column at even spaces from each other a system of cylindrical elements is mounted, interconnected via force tractions with forming of closed traction system. Portions of tubing column underground portion from well mouths to limits of operation column perforation portion together with said cylindrical elements form piston pump couples. During operation forced displacement of cylindrical elements system by driving assembly is performed with continuous consecutive pressing of oil from tubing column via above-mentioned piston pump couples.

EFFECT: higher efficiency.

5 cl, 1 ex, 3 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes first stages of capturing energy of processed heat from high pressure steam separator, placed below steam generators. Then transfer of heat energy into heated separator and evaporator and heat exchanger is performed for distillation of bed water present in oil-bearing bed and restoration of distillated water and concentrated salt solution or hard product. Concentrated water steam from heated separator is circulated through evaporator and heat exchanger to support from 1% to around 50% of steam mass in the flow, returning into heated separator, and prevent pollution and forming of scale. Equipment includes separator for processed low pressure energy, heated separator and steam compression with forced circulation circuit to produce distillated water.

EFFECT: higher efficiency.

6 cl, 2 ex, 1 tbl, 13 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: face-adjacent bed zone is heated by well electric heater and liquid is removed. Well is equipped with column of tubing pipes with perforated branch pipe at the end, separated by plug, with electric heater and pump below the plug. Branch pipe is positioned in zone of productive bed. Flow of liquid along inter-tubular space is limited by partial disengagement of inter-tubular well space at level of productive bed ceiling. Face-adjacent zone is heated with concurrent circulation of liquid along branch pipe below the cork and well space below disengagement location and feeding of water into inter-tubular space. Removal of liquid is performed with disabled heating and circulation of liquid.

EFFECT: higher efficiency.

1 ex, 1 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes cyclic differently-directed forcing of air as oxidizer. This is achieved by changing oxidizer forcing pressure and its volume, changing position of air forcing points, extraction of high-viscous oil or bitumen. Appearance of sign-alternating pressures between beds of different saturation provides for acceleration of capillary counter-flow saturation with water of zones with oil or bitumen, forcing gases into portions with oil or bitumen along small porous channels and transfer of oil or bitumen from heated areas along large porous channels. Change of direction of flows of gas of oil or bitumen between wells strengthens process of increase of area of effect of bed by bed inside burning. In such a way, use of stagnant areas is increased and bitumen extraction coefficient is increased.

EFFECT: higher efficiency.

1 ex, 1 tbl, 2 dwg

FIELD: oil industry.

SUBSTANCE: device has compressor machine and serially placed behind it screw pump, connected via pipeline to force well. Product well is connected to separator and collector, which is connected by water feed pipeline to compressor machine and pump. Gas space of separator is connected to input of compressor machine by gas feed pipeline.

EFFECT: higher efficiency.

3 cl, 2 dwg

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