Bottom-hole insert injector device

FIELD: oil and gas industry.

SUBSTANCE: insert injector device includes a body that has an inner oil channel configured to provide a through passage of oil. The body further has an annular chamber formed around the inner oil channel. The annular chamber has a chamber opening configured to be connected to receive a flow of a gaseous heat transfer medium. The body also has at least one injector opening providing a passageway between the annular chamber and the inner oil channel. At least one injector port is configured to inject a gaseous heat carrier into the oil passed through the inner oil channel.

EFFECT: increased efficiency of the bottom-hole insert injector device.

15 cl, 5 dwg

 



 

Same patents:

FIELD: mining operations.

SUBSTANCE: invention relates to the coal industry and can be used in the preparation of coalmine methane for recovery by different consumers. A unit for the preparation of coalmine methane for recovery is proposed, containing a moist separator, a filter of wet cleaning the gas, the control devices of methane content in the gas mixture and pressure, a mixer, a devices of protection against emergency regimes, the pipelines of supplying the gas mixture and the captured gas and the control system of methane concentration with the gas analyser and the gas concentration controller, the primary damping container mounted in the supply line of the captured gas in front of the mixer, and the secondary damping container mounted downstream of the mixer in the supply line to the consumer of the gas mixture, the inlet pipeline with an air inlet, a gas analyser connected to the gas concentration controller, an odorator connected to the mixer and the gas concentration controller by the regulating valve, a pressure regulator-stabiliser, and the additional control valves, and a shut-off valve mounted on the inlet pipeline between the air inlet and the mixer. In addition, the unit is provided with a cassette with the separation membranes mounted between the injection and the discharge pipelines, and has the ventilation device connected to the gas pipeline for methane-air mixture intake from the shaft, at that the moist separator, the filter of wet cleaning the gas are mounted in front of the cassette with the separating membranes.

EFFECT: increasing the efficiency of operating unit of the preparation of coalmine methane for recovery, by providing the ability of preliminary separation of recyclable captured methane-air mixtures, and improvement of safety of the unit operation.

1 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for mining. The method of methane capture during mining of coal layers by a power mining complex comprises the mining of a coal layer using the sections of a powered roof support with box-shaped top covers of a face conveyor and combine. Simultaneously with coal extraction, transportation through a face and preparatory developments, through the holes in the box-shaped top covers and telescopic branch pipes methane is pumped out. From a production face all box-shaped top covers of sections are joined among themselves with corrugated branch pipes of a certain length equal to an advance increment of the powered roof support.

EFFECT: invention allows to implement the comprehensive and rational coal use in subsoil due to efficient by-product extraction of methane, reduce net cost of coal, provide safe mineral development.

3 dwg

FIELD: mining.

SUBSTANCE: method of determining the gas recovery of the mined seam in the stopping face is proposed, which consists in measuring the volumes of coal extracted by the miner and the intensity of methane release in the face area of the stopping face, determining the connection between the measured values and determining the value of gas recovery of the seam in the stopping face of the stopping face. At that the volume of coal excavated, and the intensity of methane release are measured at the site of the seam outside the area of its natural degassing with the mounting chamber and up to the first placing the main roof. The data of volume of coal excavated, which excess their average values during the observation period are used. The value of gas recovery of the seam in the stopping face is determined by the value of the coefficient of the amount of coal excavated in identified relationship between the values measured in the process of combine operation on coal drawing.

EFFECT: improvement of accuracy of determining the gas recovery of the mined seam.

FIELD: mining.

SUBSTANCE: method of extraction of methane during abandonment of methane saturated mine comprising the termination of coal mining in a working face, isolation of local sections, execution and sealing of wellheads, connection of wells to a vent pipeline and methane extraction is offered. The wells are made from mining near break-down chamber over coal block into free space of the broken-down rocks of the main roof of the stopped working face, wells connect to the main vent pipeline and methane extract before isolation of local developments and after isolation of mine.

EFFECT: increase of time of operation of vent wells and increase of volumes of extracted methane suitable for utilisation.

FIELD: mining.

SUBSTANCE: method of stimulation of coal bed through the wells drilled from excavations, comprising the hydraulic fracturing and the subsequent development of the formed cracks by air purge is offered. The hydraulic fracturing is performed by isolation with packers of the well site with the subsequent portion water pumping into the isolated site at a speed and under pressure, sufficient for layer hydraulic fracturing. The pumping of water portions is repeated until occurrence of initial cracks of hydraulic fracturing. Then the water is pumped out from a well and air at the volume sufficient for development of pattern of cracks of hydraulic fracturing is pumped. The creation of pattern of cracks of hydraulic fracturing is repeated on well sites along the whole its length with the intervals pre-determined by geological conditions and pre-set degassing level.

EFFECT: improvement of efficiency of coal bed degassing.

1 dwg

FIELD: mining.

SUBSTANCE: method of determining the length of bearing pressure zone from breakage face is proposed, comprising preparatory workings, mining of coalbed with breakage face, drilling the degasification well, sealing its mouth from the mine atmosphere, measuring the intensity of gas release from the well when it transition from the zone of natural permeability of the bed in the bearing pressure zone from the breakage face. At that, the well in the unrelieved mass of the bed is drilled to the border of the bearing pressure from the opposite working, and the well mouth is sealed to the depth of the bearing pressure zone from the working, from which it is drilled. And the length of the bearing pressure zone from the breakage face is determined according to the distance between the zones of start of loading the bed and start of its discharge from the rock pressure.

EFFECT: improvement of accuracy of determining the length of the bearing pressure zone from the breakage face.

FIELD: mining.

SUBSTANCE: invention proposes a forecasting method of gas balance of a working face, which involves measurement of volumes of extracted coal and intensity of gas release, establishment of a relationship between measured values and determination of a parameter of gas recovery of the bed being developed. The above measurements are made during each coal extraction shift, and the gas recovery parameter of the bed is determined as per intensity of maximum gas release during breaking cycles of the measured coal. A share of gas balance of the developed bed to the bottom-hole region is set by the ratio of intensity of maximum gas release from the bed and intensity of gas release of the working face.

EFFECT: method allows improving reliability of forecast of gas release from gas release sources to the bottom-hole region of the working face and recommending reasonable degassing methods and parameters of the developed bed and the worked-out space, thus providing standard parameters of mine air in a long working face and in an extraction area.

FIELD: mining.

SUBSTANCE: invention relates to mining industry, namely to underground coal extraction. The invention proposes a complex method of preliminary degassing of a working coal bed, a worked-out area and accompanying beds and controlled caving of heavy roof, which involves performance of field development workings - strike entries and cross-entries; then, out of degassing-torpedo in-bed workings there drilled are groups of wells into soil and roof of the bed, and out of the leading in-bed working there drilled are long wells that are directed towards the worked-out area; after that, the leading shooting is performed to create fractures, and smooth roof caving is performed. A set of activities includes location of groups of wells that are common both for degassing and for shooting, and when field development strike entries are being developed, safety stiff and flexible pillars are formed. The wells drilled in the bed roof are of a degassing-torpedo type and they are located in such an order at which formation of fractures is provided by means of the leading shooting for longitudinal caving along the line passing parallel to a longwall. In addition to the leading shooting, lagging shooting is performed, by means of which transverse caving of slabs is performed along the line perpendicular to the longwall. And degassing of the worked-out area before caving in its upper part is performed through half-retained longwalls of the well.

EFFECT: increase of operating safety in a working face in beds that are dangerous as to a gas factor.

6 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises creation of fractures in coal seam by cyclic increase and decrease in fluid pressure in well and affecting the seam by low-frequency high-amplitude pressure pulses at fluid pressure increase in the well. Note here that connection of wellhead via fast-response valve with pressurized water source and with drain valve. Said fast-response valve is opened for time interval sufficient for water wave to reach the most remote section of the well and to develop hydraulic shock so that forming fractures of coal seam are developed. Then, said valve is closed to decrease water pressure to initial value. Note here that duration of valve opening and frequency of hydraulic shock repetition are selected to allow sufficient fracture formation, coal formation destruction and filling of the most remote well section with fragments of destructed coal seam. Hydraulic shocks are repeated unless well is filled with said fragments to its wellhead.

EFFECT: development of uniform system of fractures, accelerated destruction of coal seams at minimum application of equipment.

1 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises drilling of degassing well on the seam, making of permeability channels around said well, water removal and methane extraction. At seam degassing, well mouth is periodically closed and opened. Note here that closure is performed for 1-3 days while opening duration is limited by time required for attainment of maximum methane yield in previous period. Besides, air is forced in degassing wells at zero yield before first closure at absolute pressure over 6 bar to develop starting channels of permeability.

EFFECT: ten-fifteen times increase in methane yield, intensified degassing and reduced gas content.

2 cl, 3 dwg

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 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

Up!