Earth or rock drilling and obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (E21B)

E   Fixed constructions(158735)
E21B              Earth or rock drilling (mining, quarrying e21c; making shafts, driving galleries or tunnels e21d); obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells(43222)
E21B10 - Drilling tools(3090)
E21B11 - Other drilling tools(29)
E21B43 - Obtaining fluids from wells(11343)
E21B45 - Surveying or testing(396)
ethod of draining liquid from wells when using underground oil production method // 2642759
FIELD: oil and gas industry.SUBSTANCE: method includes supplying liquid to the divider through a hole in the cover of the upper chamber, filtering large mechanical impurities, supplying liquid into the upper chamber with a float, then through openings of throttle partition into the lower chamber to the valve unit. Under the action of high level of liquid in the upper chamber, the float moves upward and, by means of the rod, it opens a first small valve. Then, if it is necessary to increase the throughput capacity of the large valve, moving the small valve with one degree of freedom inside the large valve and together with it inside the sleeve along the common vertical axis. After draining liquid through the discharge bushing under the action of lowering of liquid level in the upper chamber, the float moves down and closes both valves.EFFECT: improved safety of the drainage process due to smooth adjustment of liquid outlet and provision of process continuity.3 cl, 12 dwg

ethod of multi-stage treatment of injection well bottomhole zone in terrigenous and carbonate formations // 2642738
FIELD: oil and gas industry.SUBSTANCE: method of multi-stage treatment of injection well bottomhole zone in terrigenous and carbonate formations includes hydrochloric acid treatment with acid composition of 0.5-1m3/m volume followed by pressing with aqueous solution of colloidal silicon dioxide nanoparticles or aqueous solution of surface-active substance of 2-3 m3/m volume; clay-acid treatment with clay-acid composition based on hydrochloric and hydrofluoric acids with 0.8 0.5 m3/m volume followed by pressing with aqueous solution of colloidal silicon dioxide nanoparticles or an aqueous solution of surface-active substance of 2-3 m3/m volume, treatment with hydrocarbon solvent of 0.5 m3/m volume and with clay-acid composition based on hydrochloric and hydrofluoric acids with 0.5 m3/m volume then by spraying aqueous solution of colloidal silicon dioxide nanoparticles or aqueous solution of surface-active substance of 2-3 m3/m volume. The following composition is used as acid composition, vol %: 30% hydrochloric acid 50-63; diethylene glycol 6-16; acetic acid 1-3; water-repellent agent based on amides, 1-3; corrosion inhibitor, 1.5-2; the rest is process water. The following composition is used as the clay-acid composition, vol %: 30% hydrochloric acid 48-60; hydrofluoric acid 1-4; diethylene glycol 6-16; acetic acid 1-3; water-repellent agent based on amides, 1-3; corrosion inhibitor, 1.5-2; the rest is process water. As aqueous solution of colloidal silicon dioxide nanoparticles, 1-2%- aqueous solution of colloidal silicon dioxide nanoparticles is used, containing wt %: colloidal silicon dioxide in acrylic acid, 32-40; propylene glycol monomethyl ether, 59.5-67.5; the rest is water. Aqueous solution of surface-active substance is 2-4% aqueous solution of surface-active substance containing, wt %: diethylene glycol, 1-3; hydrophobic agent based on amides, 0.5-2; the rest is process water. Solvent based on toluene fraction of straight-run gasoline or based on an aromatic hydrocarbon concentrateC10 is used a hydrocarbon solvent.EFFECT: increased efficiency injection wells, reduced time for implementation of the method, its simplification and reduced cost.2 cl, 7 dwg
Grouting mortar // 2642736
FIELD: mining; oil and gas production industry.SUBSTANCE: invention relates to mining and oil and gas production industry and can be used in development of mineral deposits by underground method and repair and insulation works in tunnels, oil and gas wells. Grouting solution contains 48–50 wt % of converter slag, 33–35 wt % of electric steel-smelting slag, 9–11 wt % of burned rock of mine dumps and slurry of spent electrolytes of acid batteries – the rest. Converter slag has the following composition, wt %: SiO2 35.43; Al2O3 8.51; Fe2O3 1.94; FeO 2.83; MnO 1.15; CaO 29.97 (including CaOfree 0.39); MgO 20.69; SO3 0.04; P2O5 0.14, and electric steel-smelting slag has the following composition, wt %: SiO2 26.63; Al2O3 5.33; FeO 0.95; MnO 0.37; CaO 55.55 (including CaOfree 0,71); MgO 9.68; S 1.41; P2O5 0.03; Cr2O3 0.05.EFFECT: technical result is wider nomenclature of cementless grouting mortars with increased durability of cement.1 cl, 3 tbl
Built-in mechanism for attenuating torsional vibrations for oil field drilling tool // 2642734
FIELD: oil and gas industry.SUBSTANCE: downhole tool for attenuating torsional vibrations comprises a free-wheeling coupling assembly adapted to connect the drill string to a drill bit and engage for transmitting torque from said drill string to said drill bit in a first rotation direction of the drill string and disconnecting to prevent torque transmission from said drill string to said drill bit in a second rotation direction of the drill string opposite to said first direction. Said free-wheeling coupling assembly comprises a coupling housing having a generally tubular shape and defining an inner wall with a groove of a tapered shape therein, a coupling mandrel, on one axle located inside said coupling housing and defining the outer wall with a recess made therein, a wedge-shaped element inserted into said recess and forced radially outward up to contact with said inner wall of said coupling housing. Said wedge-shaped element is being adapted to come into contact with said recess to prevent unrestricted rotation of said coupling body relative to said coupling mandrel in the first direction and disconnecting from said groove for providing unrestricted rotation of said coupling housing with respect to said coupling mandrel in the second direction opposite to the first direction.EFFECT: providing torsional vibrations without the need to increase the bit rate or decrease the weight on the bit.18 cl, 15 dwg

Lock reverse connection of hollow sections of drilling or casing string // 2642730
FIELD: mining.SUBSTANCE: connection comprises a nipple and a coupling interlocked with each other by a gear, splined or other surface capable of transmitting a torque and connected by, at least, one clip receiving an axial force. The clip is made in the form of a curved flexible rod located in an annular cavity formed by grooves made in one transverse plane on the round mating surfaces of the coupling and the nipple. A transverse groove is provided in the coupling wall for inserting a paper clip, which has a hook formed at its end for insertion into the said annular cavity as the string is extended and removed when it is dismantled. The hook is made in the form of a bend made in a plane perpendicular to the plane of curvature of the clip and is located between the outer surface of the coupling and its interface with the nipple in the groove of its wall having a shape corresponding to the shape of the hook.EFFECT: excluding the force contact of the hook clip with the ground.6 cl, 8 dwg
Well telemetric system with voice coil type drive // 2642703
FIELD: physics.SUBSTANCE: pulse telemetric system is proposed for transmitting digital data from a borehole to a surface block, comprising: a drill pipe disposed in a borehole comprising an upstream end and at least a portion of a drilling fluid; one or more borehole sensors; a processing unit connected to one or more borehole sensors; a valve connected in fluid with the drilling mud to control the pressure in the drill pipe near the front during the end of conditioning the pressure oscillations in the drilling mud to transmit data through the drilling mud. The valve comprises a voice coil type drive to form pressure drops in the drilling fluid. In this case, the processing unit comprises a speed sensor configured to measure the speed of the voice coil type drive, and wherein the processing unit is arranged to control the position of the voice coil type drive based on the measured speed.EFFECT: providing higher data transfer performance, extending the lifetime of the telemetric system elements.17 cl, 7 dwg
ethod for well drilling process conditions regulation // 2642699
FIELD: mining.SUBSTANCE: method is based on bit delivery into a recess by a three-channel mechanical and hydraulic capacity converter, according to the proposed solution, mechanical energy is represented by a load on the "bit-face" system defined by the dead weight of the compressed part of the string, and is supplied to the system with a speed defined by the tool feed transition factor and the associated condition ensuring the optimisation of the drilling process, defined by a mathematical expression.EFFECT: determination of the parameters of the conditions ensuring mechanical energy supply to the bit-face system, taking into account the rate of rock fracture on the face.4 dwg

ethod for investigation of horizontal wells // 2642694
FIELD: oil and gas industry.SUBSTANCE: method involves running a downhole tool with a coiled tubing into the well. Measurement of downhole parameters, determination of water inflow zones and water-absorbing intervals. Connection of coiled tubing pipe on the surface to the pump for supplying working medium into the well, in this case, prior to running into the well, the downhole tool is placed below in wall of the coiled tubing pipe, there are technical holes cut for pumping in or pumping out the working medium to/from the well bottom, and measurement of well parameters is carried out first in repression-pumping mode, for example, formation water via the coiled tubing pipe into the well, then selection of formation water is carried out in depression mode, and according to abnormal simultaneous changes of the downhole tool, water-absorbing zones and the zones of water-absorbing intervals are set. In this case, the downhole tool readings are transmitted to the surface via the electromagnetic communication channel, then arrangement of the existing technical openings is aligned with location of specified intervals, and water-insulating composition is pumped through the existing technical openings in the coiled tubing pipe. After expiration of the set holding time of water-insulating composition consolidation in said intervals, repeated measurements of downhole parameters are performed.EFFECT: invention makes it possible to improve the technology for conducting investigations with subsequent implementation of waterproofing, repair and corrective works on coiled tubing pipe in horizontal wells.3 cl, 1 dwg

Autonomous modification of the frequency of rotation of the site of the drill string // 2642690
FIELD: mining.SUBSTANCE: method of operation of drill string includes a standalone modification of frequency of rotation located in the borehole of the plot of the drill string in borehole hosted on other sites the drill string, each of these sites contains many sections of drill pipe. The drill string that has altered the frequency of rotation, can represent the lower section of the drill string, located between the end of the drill string, located on the bottom and curved stretch of wells in which the drill string. The lower stretch of the drill string can have increased frequency of rotation relative to the rotational speed of the Drill string plot located within curved plot hole. Autonomous modification of frequency of rotation can be implemented by attaching one or more gears to the drill string, and gear specified device made with the ability to switch between release mode, in which the specified device transmits the torque and the rotation of the drill string without modification, and the clutch, which specified the device transmits the torque and the rotation of the entire length of the drill string with a modified rotational speed and torque. Selective switching gear shifting devices located in the well can be carried out from the ground.EFFECT: stable rotation speed of each of the sections of the drill string.22 cl, 9 dwg

Well device for dosage supply of reagent // 2642678
FIELD: mining.SUBSTANCE: device comprises a container with a breathing hole in which a deformable shell filled with a liquid reagent is placed and a metering peristaltic pump with an elastic tube cooperating with the rotor by means of pressure rollers. The drive of the peristaltic pump is a hydro turbine, the shaft of which is connected through a reducer to the rotor of the peristaltic pump. The hydraulic turbine is covered from below by a sealing element abutting against the wall of the borehole and is brought into rotation by the formation fluid.EFFECT: reliability of the dispensed feed of the reagent is increased by providing it with an autonomous energy source.2 dwg
ethod for accumulation of cold in formation // 2642611
FIELD: oil and gas industry.SUBSTANCE: method for accumulating cold in the formation involves the use of a two-tube arrangement in a dual horizontal well, lowering of a first lift pipe with packer installation for separating the annulus and production of oil, lowering a second lift pipe of smaller diameter. Coolant is circulated by means of injection into the second lift pipe and lifting along the annulus. In this case, the formation is cooled simultaneously with production of oil from the well, as a result the conditions for keeping hydrates at the boundary of gas-oil contact are provided.EFFECT: increased oil recovery of oil-gas condensate fields due to presence of hydrate barrier at the boundary of gas-oil contact.1 dwg

Well three-axis electromagnetic determination of distance // 2642604
FIELD: construction.SUBSTANCE: method of well distance determination is proposed, comprising: drilling a first wellbore comprising an elongated conductive body; installing an electric field sensor in a second wellbore; inducing current along the first wellbore, as a result of which the electromagnetic field is emitted from the first wellbore; receiving the electromagnetic field with the use of the electric field sensor. The electric field of the electromagnetic field is measured, and using the measured electric field for calculating thereby: the orientation of the first wellbore and the distance between the first and the second wellbore, or the direction of the first wellbore relative to the second wellbore.EFFECT: expanding the arsenal of technical means for determining the distance between the wells.30 cl, 11 dwg

ethods and systems for adjusting technological process of well logging // 2642602
FIELD: oil and gas industry.SUBSTANCE: method comprises measuring formation characteristics using a logging device located in the wellbore, collecting measurement data corresponding to the measured formation characteristics, generating a visual representation of the formation using the collected measurement data, setting the control parameter of the well logging of the logging device based on at least some measurement data and the mechanism of adaptive learning within the logging device, and selecting updates for the adaptive learning mechanism at least partially on the basis of the visual representation.EFFECT: increasing the efficiency of managing the working process of the well logging.28 cl, 12 dwg

ethod of optimal adaptive control of oil-gas wells drilling process on three mode parameters // 2642590
FIELD: oil and gas industry.SUBSTANCE: method of timely optimal control of well drilling process realizes an adaptation of determined model of fractional-power type with three control parameters to conditions at a bottom by changing its coefficients, calculation of optimal loads on bit, bit rotation rate, drilling mud consumption and well drilling at optimal modes, the achievement of which is determined by the minimum vibration frequency of the drill string. The method envisages multiple coefficients updating for power law model by results of well measurements of drilling rate, calculation of optimal parameters of control against the criterion of maximum mechanical speed, performance of drilling at calculated parameters with optimum control against minimum vibration of the drill pipe.EFFECT: increased accuracy of optimal control of drilling mode and increased mechanical rate of well drilling due to optimisation of mathematical model control with three adjustable parameters and monitoring the achievement of the optimum minimum vibration of the drill string.1 dwg

Drill string filter // 2642580
FIELD: mining engineering.SUBSTANCE: invention relates to filtering devices for cleaning drilling mud and protecting drilling equipment against the ingress of large mechanical particles. The filter includes a perforated tube installed in axial channel of a hollow body. An adapter provided with a gripping device for removing the filter is mounted on the upper end of the perforated tube. A swirler in the form of a spiral is installed in the axial channel of the adapter. A flow splitter is installed in the middle part of the perforated pipe, perpendicularly to its axis. The flow splitter is in the form of a rod, on which two bevel cuts are made with formation of a triangle in section which is turned with its vertex to the adapter. A bottom with perforation holes and one radial hole is installed on the lower end of the perforated tube for installation of a cable, which upper end is fixed in the hole a supporting ring body rigidly connected to the adapter.EFFECT: improved reliability by preventing clogging of perforations with slurry, holding filter elements in case of their destruction, reduction of flow rate.3 dwg

Downhole seismic source // 2642199
FIELD: oil and gas industry.SUBSTANCE: downhole seismic source comprises a power element in the form of a variable diameter hydraulic cylinder provided with a plunger that interacts with a mechanism of its reciprocal movement along the hydraulic cylinder axis, and a system for supply and control of seismic source. The seismic source is provided with a double-acting electromagnetic hammer mounted coaxially with the power element, in which non-detachable cylindrical housing there are coils of return and forward strokes of the striker, poles and inductive sensors rigidly mounted on the diamagnetic guide, and the striker. The lower end of the striker interacts with the plunger of the hydraulic cylinder. The cavities of electromagnetic hammer are evacuated from the side of the lower and upper ends of the striker, and the longitudinal grooves are made on the outer surfaces of the electromagnetic hammer body and the hydraulic cylinder designed for receiving power supply lines of seismic source electromagnetic hammer coils the and its control system. The communication lines are connected through collector mounted in the upper cover of the electromagnetic hammer and communicated by the cable to the seismic source power supply and control unit.EFFECT: increased efficiency of vibration seismic action directly on oil formation.3 cl, 3 dwg

Well equipment for processing the bottom zone of formation // 2642198
FIELD: oil and gas industry.SUBSTANCE: well equipment for treatment of formation bottomhole zone consists of a jet pump, a production tubing string (PTS), a ground power pump, a ground separation system and a control system. The jet pump includes a mixing chamber and a nozzle. An inlet channel of the jet pump nozzle is connected to the ground power pump through the tubing string. An output of the mixing chamber of the jet pump is connected by a pipeline to the ground separation system. A control valve connected to the jet pump is connected by a communication channel to the control system. In this case, the inlet channel of the jet pump nozzle is further communicated via the control valve with the outlet of the mixing chamber. The control system is made in the ground version.EFFECT: increased reliability of equipment and expanding field of its application.4 cl, 1 dwg

ethod to increase formation hydrocarbon yield and intensify oil-gas-condensate production by means of formation radial penetration with water jet // 2642194
FIELD: oil and gas industry.SUBSTANCE: method includes installing into the well a high-strength tubing, a diverter with inner channel extending therethrough, tying and possible thereof orientation in space in the interval of the lower level drilling of lateral wellbores, sealing the wellhead, installing downhole equipment comprising a water jet nozzle, control unit of the wellbore path, navigation system, working flexible tubing, a device for redistribution of flow, return valve feeding the flexible tubing, supplying liquid into the inter-string area of the tubing/flexible tubing, moving the water jet nozzle through the sealing device. Through the diverter, in contact with rock, drilling of planned length radial wellbore is conducted using the navigation system for monitoring actual position of the wellbore in the formation, and with using the control unit of the wellbore path to provide wellbore drilling along the planned path. After driving the working flexible tubing string with the nozzle through the formation, removal from the formation and well flushing is carried out up to complete discharge of slime. By actuation of the mechanical turning device, the diverter is moved to another plane. The work cycle is repeated for the next lateral wellbore. Milling of a separate port for each lateral wellbore is carried out immediately before performing the main operation for driving lateral wellbores through the diverter. When drilling the lateral wellbore, the wellbore path is determined and changed by supplying the working flexible tubing with wellbore path control unit and the navigation equipment. In order to perform drilling of radial wellbores at the following levels, the supply and working flexible tubing is extracted from the well, tubing is removed from the mechanical anchor, fitting pipe of the tubing that was preinstalled and equal to the length of the transition to the next level is removed, the tubing is seated on the mechanical anchor, and the working flexible tubing with navigation system, control unit of the wellbore path, water jet nozzle is run in into well, after that the operation for drilling of radial wellbores is repeated.EFFECT: increased productivity of wells and hydrocarbons recovery factor, possibility to conduct address action on the formation, possibility to conduct intensification without effecting on string cement support with considerable pressure drop and chemical destruction, possibility to stimulate the formation by a significant pressure drop or chemical failure, cleaning the wellbore when drilling thereof.3 cl, 2 dwg

Bottom-hole insert injector device // 2642192
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

System of hydraulic fracturing of formation with hydraulic energy transmission system // 2642191
FIELD: mining.SUBSTANCE: system includes a hydraulic energy transmission system configured with the possibility of communicating pressure between a first fluid media and a second fluid media. The hydraulic energy transmission system is made so as to minimize or prevent mixing of the first and second fluid media.EFFECT: enhancement of efficiency of the formation hydraulic fracturing.18 cl, 11 dwg

Well pump unit // 2641812
FIELD: oil and gas industry.SUBSTANCE: submersible centrifugal pump with electric motor is installed in the well on a tubing string. A compensator is installed above them. A pneumatic cap with piston is placed therein. From the inside, the piston is spring-loaded by pack series-connected plate springs separated by gaskets. The gaskets form a clearance with pneumatic cap inner surface. The plate springs are configured with different ratios of spring cone height to cone wall thickness and have such power characteristic, so that at parallel connection of forces of spring stack and pressure inert gas on the piston, a resultant restoring force is created with working portion of given low quasi-zero rigidity.EFFECT: increased serviceability and reliability of plant operation, reduced vibration of underground pump equipment caused by presence of gas inclusions in pumped out product.8 dwg

Case elevator // 2641803
FIELD: oil and gas industry.SUBSTANCE: case elevator consists of case, bracket, and door connected to the case. From the exposed end of the door next to its lower end wall and parallel to this wall is a groove. The door is made with an elongated end located under the groove. On the underside of the elongated end of the door there is a projection in the form of a straight triangular prism, the base of which is a right-angled triangle. The prism face, formed by the hypotenuse of the triangle is located at an acute angle to the underside of the elongated end of the door, and the small face of the prism rests against the outer wall with closed and fixed by the bracket position of the door. The height of the small face and the thickness of the door area under the groove are made with the possibility of removing a small face of the prism from the outer wall of the bracket when the elongated end of the door is bent towards the groove of this door.EFFECT: increase of reliability and simplification of the design of the device.4 dwg
Drill string overflow valve with screw well bottom engine // 2641800
FIELD: oil and gas industry.SUBSTANCE: device comprises a body with threaded projection in its lower part and an inner thread in the upper part, and radial holes in the middle part. In the body, there is a hollow step piston, a spring is placed on its lower step, in the wall of the piston lower step there is a first radial hole, a second radial hole made in the wall of the piston upper step. The piston has a middle step. A bushing is installed between the piston and the body. In the middle part of the bushing there is an inner circular belt which encloses the middle step of the piston. The first radial holes are made above the circular belt in the bushing wall communicating with radial holes the in body and with second radial holes made in the middle step of the piston. A conical bore is made in the upper step of the piston which inner diameter widens to the end face of the piston upper step, the bushing and the piston are fixed in a body in the working position by a nut, which inner surface is made conical and flush with conical recess of the upper step of the piston. The spring has a multilayer anticorrosive coating, its lower end is located in the lower circular groove which is made in the valve body.EFFECT: reduced valve wear.9 cl, 1 dwg
Use of ionized fluid during hydraulic fracturing of formation // 2641681
FIELD: oil and gas industry.SUBSTANCE: method includes: introducing a fluid containing positively charged ions into at least some of the fractures; provision of said ions to convert shales along cracks into aragonite crystals so that some of the aragonite crystals become suspended in the fluid; removing some of the fluid with the weighted aragonite crystals from said formation. Removal of the aragonite crystals opens or expands the fractures and increases the permeability of the formation by increasing the amount and production rate of hydrocarbons from said formation. The fluid remaining in the mass continues to convert the following calcite crystals along cracks into aragonite crystals, so that aragonite becomes more weighted in the fluid, a certain amount of the weighted aragonite fluid is removed from said formation, thereby further increasing or maintaining the permeability of said formation.EFFECT: increased hydrocarbon production efficiency.11 cl, 39 dwg

Rock oriented cutting device // 2641679
FIELD: mining.SUBSTANCE: device includes a hollow cylindrical body with radial holes bushing with the bevelled inside edges, sleeve liquid permeable material, filled with loose substance solidified when interacting with the fluid. It is equipped with a second sleeve. The hollow cylindrical body with radial holes is made in the form of a cup which, on the side opposite to its bottom, is inserted with the possibility of longitudinal displacement into the sleeve to radial holes. The bushing from the side free from the mentioned housing is fastened to a pipe string for supplying a working fluid. One of these hoses is wound on the bushing and the second one on the end of the hull free from the bush to the radial holes.EFFECT: increasing the tensile force in the plane orthogonal to the borehole axis and excluding the effect of the device on the rock break force.5 cl, 1 dwg
Plant for pulling-and-running operations in wells with inclined wellhead // 2641677
FIELD: oil and gas industry.SUBSTANCE: plant includes mobile chassis with a frame, on which one or several hydraulic jacks of one mast end equipped with rotary lever and made for guiding pipes into the inclined wellhead, a mast post for mechanical locking of the mast at an angle, a traveling mechanism with a crown block and a block for lifting the pipes on the mast, a pulling winch for lifting pipes along mast from the well, a support beam assembly of the mast screw jack for orienting the mast relative to the wellhead, support ramps of the plant at the well under the chassis and jacks connected to frame and configured to support on the ramp and lifting on the frame from chassis with fixation in working position. The frame is in the form of an assembly consisting of fixed and movable parts relative to the chassis. Movable part of the frame on which the mast base and hydraulic jacks are mounted is mounted on the fixed frame for limited longitudinal movement by means of jacks connecting parts of the frame. The fixed part of the frame is connected with the rear and the front jacks through a telescopic beam for limited transverse movement by means of side jacks which connect the telescopic beam and the fixed part of the frame. The mast for powered lowering of the pipe string into the well is additionally equipped with one or several winches, which lower support is located on the fixed part of the frame, and the free end is equipped with a mechanism for catching the upper end of the pipe string lowered into the well. Each jack is a combination of hydraulic and mechanical hoist for fixing the fixed part of the frame at a required height relative to the supporting ramps.EFFECT: increased efficiency of the plant.3 dwg

ethod for sealing degassing wells // 2641555
FIELD: mining.SUBSTANCE: method for sealing degassing wells comprises performing oriented hydraulic fracturing of rocks, creating air-impermeable screens in surrounding array, creating rock layer preventing air filtration into the working part of the degassing well. The rock layer preventing air filtration into the working part of the degassing well is formed between two parallel air-impermeable screens due to impregnation of rocks with liquid with formation pressure higher than air pressure in the mine working.EFFECT: reduced air inflow from the mine working into the working part of degassing well through coal-rock mass.10 cl, 1 dwg

Device for stabilizing and holding drill string // 2641550
FIELD: oil and gas industry.SUBSTANCE: device for stabilizing and holding the drill string comprises a housing, levers hingedly mounted on it each on its axis arms with clamping surrounding surfaces formed thereon, coupled to each other by gear sectors coaxial to the hinges, enabling the symmetrical rotation of the levers in opposite directions. Gearing is made double-row. The teeth of each of the paired rows are mutually displaced along the circumference by half the circumferential pitch.EFFECT: increase in manufacturability of production.2 cl, 4 dwg

ethod for installing geothermal heat exchangers for low-grade heat extraction // 2641439
FIELD: heating system.SUBSTANCE: method for installing geothermal heat exchangers for low-grade heat extraction comprises drilling wells using a drill string. Well drilling for the installation of probes is carried out without transferring the drilling rig from one place and at an angle of 20-45 degrees to the horizon. A reinforced concrete ring with a diameter of 1.5 m is installed into the soil, its upper end is buried by 0.3-0.4 m from the surface. A ring area with a width of 0.5 m is arranged at the same level. The bottom of the ring is poured with a concrete blinding. On top of the reinforced concrete ring a well support of the drilling rig is mounted, drilling axis inclination is determined, the drilling rig is mounted on the well support, the concrete ring is used during the drilling process as a sump, and after well completion - as a decompression chamber of the geothermal collector. When the predetermined drilling depth is reached, a replaceable pilot extractor is lowered on the rigid cable to the drill string. After extracting the pilot to the drill string performing the role of a casing pipe, the prepared geothermal probe is lowered, the drill string is screwed with drilling rig rotator and raised by 0.5 m.EFFECT: reduction in the number of operations, in particular, of lifting the drilling rig, casing the wellbore with a casing pipe, excavating an additional pit or a sump for the drilling fluid circulation, transferring the drilling rig to a new drilling site.10 cl, 3 dwg

Stand for simulating process of inclined-directed gas-liquid flows // 2641337
FIELD: oil and gas industry.SUBSTANCE: suggested stand includes one horizontal pipe in the form of serially connected separate sections of pipes, a pump, connecting pipelines, shut-off devices, flow meters, lifting units, and contains additionally three horizontal pipes made in the form of serially connected separate steel sections of pipes, measuring devices, a gas supply unit. A bubbler is installed at the inlet to one of the pipes. It contains a flow-through blower, which inlet is connected to the gas supply unit and the outlet is connected to the bubbler, an accumulating vessel, which outlet is connected with the bubbler through a pump, a separator which inlet is connected to the outlet of said pipe, gas outlet is communicated with flow-through supercharger, and liquid outlet is communicated with the inlet of accumulating vessel. The sections of horizontal pipes are interconnected by flexible connecting elements. All pipes have different diameters and mounted on lifting units.EFFECT: increased accuracy and reliability of the investigations conducted on the stand.2 dwg

ethod for preventing deposition of sodium chloride in formation bottom-hole zone and wellbores of underground gas storages // 2641152
FIELD: oil and gas industry.SUBSTANCE: method for prevention of deposition eliminates formation thereof by maintaining concentrations of sodium chloride dissolved in formation water at a level excluding its crystallization. Maintenance of specified value of concentration provides injection of humidified gas into the underground storage to exclude the process of absorption by gas moisture from formation water. The required amount of fresh water to humidify the injected gas is defined as the difference in absolute maximum gas moisture content in the formation conditions and absolute moisture content of gas supplied from the main pipeline for injecting into the underground storage.EFFECT: increased duration of wells and storages operation, and total volume of extracted gas, increased overhaul period, operation for liquidation of salt plugs is eliminated.4 dwg, 1 tbl

Deflecting device to cut port in well casing // 2641150
FIELD: oil and gas industry.SUBSTANCE: device comprises a hollow mill-reamer fixed on the drill pipe string. A deflecting wedge is suspended from mill-reamer on a shear element provided with a hydraulic attachment unit with spacer element and at least one ram having teeth on the outer surface. Fluid supply channel is made in the form of a pipeline connecting the inner cavity of the mill-reamer and the hydraulic attachment unit comprising a fishing sleeve with inner collar and circulation holes and a nozzle jet with central channel and a seat directed against the flow for drawdown ball. The nozzle jet is placed inside the fishing sleeve. The hydraulic attachment unit comprises a cylinder sleeve, a hollow rod secured to the spacer element of the deflecting wedge, a hollow rod inside the cylinder sleeve, a threaded cap fixed to the lower part of cylinder sleeve, an annular piston, a supporting bushing in the bore of the lower part of the cylinder sleeve, an elastic rod fastened to the annular piston and a ram. The hollow rod is in communication with the pipeline connecting the inner cavity of the mill-reamer and the hydraulic attachment unit. The fishing sleeve is provided with its own channel for fluid located inside its side wall and inner collar, the inlet of the channel inside the side wall is located on the end of the fishing sleeve directed against the fluid flow, the outlet of the channel in the inner collar of the fishing sleeve is located on the end directed towards the hydraulic attachment unit. The pipeline for supplying fluid to the hydraulic attachment unit is connected to the outlet of the channel on end of the fishing sleeve through a flushing hole. The pipeline at point of connection to the fishing sleeve is equipped with a union comprising an annular groove with reduced cross-section of the union wall, capable of tearing the pipeline from the pipe union with tension of the drill string.EFFECT: improved reliability of deflecting device fastening, reduced risk of accident, level of vibration, increased cutting ability of the mill-reamer, provided pure milling with smooth edges, increased accuracy when cutting a port per one running-pulling operation.3 cl, 10 dwg
Return valve // 2641146
FIELD: machine engineering.SUBSTANCE: valve comprises a body with a central threaded hole, the body includes a cage, a seat and a spring-loaded shutoff element interacting with the seat which is movably mounted in the valve cage. In the cage there is a cavity and a bottom with holes therein, in the cage cavity there is a spring for pressing a locking element to the seat, wherein the cage in the longitudinal section has a bowl shape formed by a first cylindrical portion and a second elongated cylindrical portion of a smaller diameter. In said cage portions there is the locking element made in the form of a rod with a semicircular head interacting with the seat. The seat is made with an outer thread and screwed into the central threaded body hole, the seat end is pressed to the end face of the first cylindrical cage portion, the rod end of the locking element is located inside the spring, wherein the body, the rod and the cage are made with projections, the end of the cylindrical cage portion is pressed to the body projection. A spring is between the rod and the cage projections, one spring end rests against the cage projection, and the other spring end rests against the rod projection.EFFECT: increased efficiency of the return valve.3 cl, 1 dwg

ethod of gas dynamic investigation of well for low-permeability reservoirs // 2641145
FIELD: oil and gas industry.SUBSTANCE: method of gas dynamic testing of wells for low-permeability reservoirs comprises measuring Qi and bottomhole pressure Pbi of investigated well at n different modes in the i-th, where i=1, 2, 3, …n at arbitrary time intervals τi, between the i-th and the initial research modes. Formation pressure for investigated well is determined at arbitrary moments of time by measuring formation pressure in nearest well located under observation located in the drainage zone of investigated well.EFFECT: increased efficiency when carrying out gas-dynamic tests due to reduced cost of working time for conducting investigations and improved accuracy of obtained results.2 dwg, 2 tbl
Well perforator // 2641144
FIELD: oil and gas industry.SUBSTANCE: perforator comprises a monolithic body (6) with cavities (5) made in it perpendicular to its longitudinal axis, which are made directly in the material of the perforator body. Separately made mutually conjugate constructive parts of cumulative charge are tightly fitted directly in the cavities (5): outer cover (1) of the cumulative charge, a seal curtain-washer (2) or a gland, a cumulative funnel (3), a cartridge (4) of the main explosive. In addition, a detonation transfer amplifier (7), a sealing gasket (9), a detonating cord (10) and a bushing (11) with a groove are disposed in the body (6). Each charge is connected to the detonating cord (10), located in the channel made on the outer surface of the body and ballistically connected through the hole (8) with the cartridge (4) in the cavity (5). The cartridge (4) of the explosive of each of the charges is fixed directly to the body cavity (5) and is provided with a cumulative funnel (3) mounted thereon with an outer cover (1).EFFECT: increased efficiency of devices uses, simplification of its production, expanding the range of technologies and materials used for the production, reduced material consumption and number of components required for assembling.7 cl, 3 dwg

Device to provide continuous circulation of drilling mud and corresponding plant // 2641057
FIELD: oil and gas industry.SUBSTANCE: group of inventions relates to the oil and gas production industry, in particular, to provision of continuous circulation of drilling mud during well drilling. A housing (2) of the circulation device (1) is provided with a central channel (4) designed to receive a portion of a pipe (38); a central channel (4) comprises the upper and lower sealing elements (30, 32); the sealing elements (30, 32) are provided with central holes (33) which, when said sealing elements are expanded (30, 32), can close or be in tight contact with the pipe (38) with inner sealing surface (34) pipe (38). Each of the sealing elements (30, 32) hermetically connected to a packer pipe (8) which is located in the housing (2) for rotation about the central axis (6) of the central channel (4) and is surrounded by a sealing unit (18, 20) closely fitted between the periphery of the packer pipe (8) and the housing (2).EFFECT: simplified process to provide continuous circulation of drilling mud.10 cl, 4 dwg
Control of borehole drilling operations // 2641054
FIELD: mining engineering.SUBSTANCE: method includes determining measurement values of a bottomhole assembly sensor, determining a model of the bottomhole assembly dynamics based on the measurement values of the bottomhole assembly sensor, determining a weight factor which corresponds to the final drilling point, determining a target function including the final drilling point weighted by the weight factor and one or more restrictions, wherein the target function comprises future states of the bottomhole assembly system, and determining said target function includes determining calculated future deviation from the target borehole path, determining an input control action on the bottomhole assembly that meets the target function and one or more restrictions, and using an input control action to the bottomhole assembly.EFFECT: increased efficiency of the drill string bottom hole assembly control.24 cl, 10 dwg

Use of logging instruments by pulsed neutron capture method to detect proppant near wellbore // 2641047
FIELD: oil and gas industry.SUBSTANCE: methods for identifying the location and height of artificially created fractures of a subterranean formation as well as the presence of any material associated with the packing according to the "frac pack" or gravel packing technique, near the wellbore with the use of logging instruments by the method of pulsed neutron capture are described. The proppant/sand used in hydraulic fracturing and packing processes is marked thermal neutron absorbing material. With the presence of proppant, the increased values of component capture cross-section of formation and/or wellbore in combination with reductions of measured values of metering rate detected by means of logging by the pulsed neutron capture method are used to determine the location of formation fractures as well as the presence and percent filling of packing material in the wellbore region. The changes in measured values of formation capture cross-section relative to changes in other logging parameters of the pulsed neutron capture method provide relative indication of proppant in fractures as compared to proppant in the wellbore region.EFFECT: improved efficiency for determining the location and height of particle packing according to frac pack technology.53 cl, 13 dwg, 6 tbl
ethod of separating solid phase from fluid medium (versions) and system for method implementation // 2640857
FIELD: machine engineering.SUBSTANCE: proposed group of inventions relates to methods of separating solid phase from fluid medium and can be used for separation of solid phase from drilling mud. Method of separating solid phase from fluid medium, in which: a main pipe is connected to a transverse-flow vibration screen for application of head to pulp, vibrations of are imparted to a chamber, pulp flow in tangential direction along the surface of filtering screens is provided, so that liquid from pulp passes through these filtering screens and a throttle hole. The method is carried out by means of a system comprising the transverse-flow vibrating screen, having a chamber imparted with vibrations during the screen operation; the main pipe, which is connected to the transverse-flow vibrating screen for applying pressure to the pulp in the direction of the transverse-flow vibrating screen; an inlet pipe connected to the main pipe for interfacing between the main pipe and the chamber; a filtering screen installed in the chamber of the transverse-flow vibrating screen, the throttle hole located in the chamber. The fluid in the pulp is separated while the pulp flows in the tangential direction through the filtering screen. Pulp flow through the chamber is limited by the throttle hole, and solid phase of the pulp is discharged from the chamber through the throttle hole.EFFECT: increased productivity and efficiency of solid phase separation from the fluid medium.20 cl, 9 dwg
ethod of remedial cementing operations in well // 2640854
FIELD: oil and gas industry.SUBSTANCE: method of remedial cementing operations in wells includes preparing and injecting water-insulating composition into the well, containing, wt %: acetone-formaldehyde resin - 20.0-40.0, alkali drain of caprolactam production - 45.0-60.0 and 10% sodium hydroxide solution - 15-20.0. To prepare the water-insulating composition, alkali drain of caprolactam production is mixed with 10% sodium hydroxide solution and added with stirring to acetone-formaldehyde resin. The produced water-insulating composition is pumped into the well, after which it is left for gelling for 24-48 hours.EFFECT: improved efficiency of the method of remedial cementing operations by increasing the radius of water-insulating screen and increasing the coverage of action, extended time interval for gel formation, and reduced duration and labour intensity of operations.1 tbl, 3 ex

Casing pipe centralizer // 2640849
FIELD: mining.SUBSTANCE: casing pipe centralizer includes centering metal plates fixed evenly along the perimeter on rings, retaining rings, fixed on the casing pipe, and cavities filled with water-swellable polymer. Retaining rings are installed at the top and bottom of the centralizer. Cavities for water-swellable polymer are made in the form of circular internal samples in retaining rings, directed towards the centralizer rings inserted into the retaining ring recesses with an ability of longitudinal displacement under the influence the expanding water-swellable polymer.EFFECT: unimpeded release of the casing pipe into the well and its centering during casing pipe cementing.2 dwg
ethod and device for recovery of horizontal well production and effect on formation // 2640846
FIELD: oil and gas industry.SUBSTANCE: method for recovery of horizontal well production and effect on formation includes the following steps. A complex device is first run into the horizontal wellbore consisting of a ground multifunctional control panel and control, and downhole acoustic radiator connected by a hose-cable of radial-type, a unit of geophysical instruments and an electro-hydraulic radiator with plasma discharger connected therebetween by geophysical adapters. Before completion of horizontal section, the instruments are tied by the geophysical unit. After that, the readings of downhole parameters are taken before treatment, the formation pores and the filters of the horizontal well section are cleaned acoustically. Plasma treatment of the cleaned section is carried out in order to involve dead formation zones by the source. Then, actual parameters are taken by the geophysical unit and the processes are repeated until the horizontal section of the well is covered completely. Electric hydraulic emitter is configured as a modular design and comprises a stabilisation unit, a capacitor bank, and a plasma discharger. The stabilisation unit contains a step-up-decoupling transformer which also supplies power to discharge gap plasma ignition unit. Plasma discharger consists of a body with inner cavity, whose upper part is connected to the connecting bushing, and the lower part is connected to the supporting bushing. In the body cavity there is a cylinder fixed on the middle part of the supporting bushing. The cylinder contains a piston with a rod, and a spring. Wire feed mechanism is secured in the upper part of the piston. The wire feed mechanism is in the form of a lever with a supporting platform and a link with spring. Directed incisions are made on the supporting platform and on the link from the side facing the wire. Four rods are attached to the cylinder that serve as a base for a coil fastening unit. The holes are made in the supporting bushing for arrangement and attachment of negative and positive electrodes. The electrodes are insulated with open sections providing plasma discharge. The negative electrode has an axial hole for passing the wire. A guide cone is fixed on the supporting bushing by means of posts.EFFECT: improved cleaning of bottomhole formation zone, increased well production rate.12 cl, 4 dwg
ethod for running casing string in horizontal long-distance wellbore // 2640844
FIELD: oil and gas industry.SUBSTANCE: method includes drilling a horizontal wellbore interval "drawdown", lowering the casing string. After the casing string has reached the depth of the production string shoe, the descent is stopped, an intermediate washing with drilling fluid is carried out with simultaneous controlled supply of nitrogen till the values of hydrostatic pressure are stabilised at the level of formation pressure values to form equilibrium in the "well-formation" system. Then under conditions of formed equilibrium, running of the casing string to the planned well bottom is continued.EFFECT: increased efficiency of oil and gas deposits development in a complex cavernous-fractured carbonate oil-saturated formation.1 cl

Compositions containing furnace dust and wollastonite and methods for using thereof in underground formations // 2640621
FIELD: mining.SUBSTANCE: method for cementing includes: providing a hardening composition containing furnace dust, wollastonite, and water. The content of wollastonite in the hardening composition forms about 1% to about 75% by weight relative to total number of cementing components contained in the hardening composition, in this case, the content of furnace dust in the hardening composition is from 5% to about 90% by weight relative to the total number of cementing components, in the hardening composition, providing possibilities for setting of the composition. The hardening composition is intended for introduction into the underground formation. The invention is defined in the dependent claims.EFFECT: decreased cost of slurry for cementing.18 cl, 4 tbl, 3 dwg

ethod for drill string disconnection in drilling unit // 2640620
FIELD: mining.SUBSTANCE: method for end rod disconnection from the drill string includes end rod rotation relative to the rest of the drill string in the release direction of the screw connection for partial disconnection of the end rod from the drill string and clamping assembly engagement with the partially detached end rod. The clamping assembly comprises a frame and a slide, suspended on the frame with a possibility of axial sliding relative to the frame. The slide includes rod grippers to grip and hold the end rod. The slide is displaced axially on the frame rail using at least one displacement element, to resist the axial displacement of the slide forward or backward relative to the frame. The end rod is additionally rotated in the release direction by means of rod grippers for additional disconnection of the end rod from the drill string and the relative axial position of the slide on the frame is controlled using at least one sensor to determine the release of the screw connection and rod separation from the drill string through slide and end rod axial displacement relative to the frame.EFFECT: efficient and reliable disconnection of drill string rods.14 cl, 8 dwg

ethod for treatment of well with removal by means of material capable of decomposing // 2640618
FIELD: oil and gas industry.SUBSTANCE: method of fracturing and removal with degradable material comprising the steps: injection of wellbore treatment fluid into the well to enter the multi-layer formation and propagate the fracturing in the formation layer, injecting aqueous suspension containing fibers of insoluble material which is capable of decomposing in the solid phase for forming a plug from compacted fibres and isolating the hydraulic fracture from the well, where the decomposed material is present in the suspension at a concentration of at least 4.8 g/l (40 lbs/1000 gallons), and the liquid phase of suspension comprises a polymeric thickener, a viscoelastic surfactant, an auxiliary surfactant, a rheology modifier, a polymeric resistance reducing agent, a drag reducing surfactant, a polymeric resistance reduction enhancer, a monodimensional resistance reduction amplifier, an aqueous brine, or a combination thereof, or a mixture thereof, by means of the plug leading from the previous hydraulic fracturing, injecting the wellbore treatment fluid into the well to propagate the next hydraulic fracturing in another formation layer, and decomposition of decomposable material to remove the plug. The invention has been developed in the dependent claims.EFFECT: increased treatment efficiency.10 cl, 8 ex, 3 tbl, 13 dwg

Proppant with improved bubbles for hydraulic fracturing in wells // 2640614
FIELD: oil and gas industry.SUBSTANCE: method for forming gas-filled bubbles on the surface of proppant particle comprises the steps for placing proppant particles in water at operating pressure of 8000-12000 psi, creating excessive gas pressure in water equal to or greater than the operating pressure of 8000-12000 psi to create saturation around or in the immediate vicinity of proppant particle, in the result the bubbles are formed on surface of proppant particles, and excessive pressure relieves from water to operating pressure level. The invention has been developed in the dependent claims.EFFECT: improved efficiency of hydraulic fracturing.11 cl, 1 dwg

Dividing cylinder unit // 2640613
FIELD: machine engineering.SUBSTANCE: dividing cylinder unit comprises at least one cylinder with piston inside the cylinder, and with a head closing one end of the cylinder to form a chamber between the piston and the cylinder head. The cylinder is configured for creating leakage of fluid from one side of the piston to its other side when the piston is in a certain position inside the cylinder. The cylinder unit is provided with separating means for subsequent controlled separation of head from the cylinder.EFFECT: swift and safe disconnection of the cylinder.11 cl, 7 dwg

ethod for development of ash-nonuniform deposit of high-viscosity oil or bitumen // 2640608
FIELD: oil and gas industry.SUBSTANCE: method for developing the ash-nonuniform deposit of highly viscosity oil or bitumen includes determining zones of different permeability in the deposit, conducting construction above the water-oil contact of the horizontal well with the additional wellbores to open low permeability zones, pumping heat-transfer medium and extracting the product. Additional wellbores are drilled in one horizontal plane with main horizontal well into low permeability zones with permeability two times lower and more with respect to average permeability of the deposit. Injection of steam is carried out by pressure not exceeding the pressure of formation hydraulic fracturing, in volume not less than 10 t per 1 m of total length of horizontal section of the main wellbore and additional wellbores, and extracting at pressure not lower than destruction pressure of walls of additional wellbores, in addition between pumping and extracting, thermal capillary impregnation of the deposit is performed.EFFECT: involvement in the development of low permeability zones, increased homogeneity of displacement, increased coverage by the exposure, creation of uniform steam chamber in the nonuniform permeability formation.1 dwg, 1 ex

Control of wellbore drilling complexes // 2640607
FIELD: oil and gas industry.SUBSTANCE: method includes determination of nominal model of downhole drilling dynamics based on sensor measurements from the downhole drilling equipment, determination of uncertainty for the nominal model of downhole drilling dynamics, determination of set of models based on uncertainty of the nominal model of downhole drilling dynamics which deviate from the nominal model of drilling dynamics, and creation of a virtual controller for downhole drilling equipment based on the nominal model and a set of models that deviate from the nominal model.EFFECT: increased control accuracy of wellbore trajectory.23 cl, 10 dwg