315 results about "Gas formation" patented technology

The invention relates to the technical field of desulfurization slurry treatment, and discloses a vacuum dehydration device and a dehydration treatment system and method for desulfurization gypsum. The device comprises a belt conveyor, filter cloth is arranged on the belt conveyor, a filter assisting component is arranged above the filter cloth, and the filter assisting component can extend into a filter cake layer on the filter cloth and damage a surface air blocking layer on the top of the filter cake layer. According to the technical scheme provided by the invention, the surface air barrier layer at the top of the filter cake layer is destroyed by the filter aid part, and the air pressure difference formed on the two sides of the filter cake layer due to suction filtration is recovered, so that free moisture in gypsum slurry is separated from the gypsum slurry under the dual effects of pushing force generated by the air pressure difference and self gravity; the desulfurized gypsum with relatively low water content is obtained.

The invention discloses a biogas logging identification method and device, a medium and electronic equipment. The method comprises the steps that coring observation is conducted on the coal measure strata, seismic data and logging data are combined, geological layering is conducted on the coal measure strata, and the geological layering is used for eliminating the influence of the space structure of the coal measure strata on an acoustic logging curve; an acoustic logging curve of the coal measure stratum is obtained, and borehole environment correction is conducted on the interval transit time corresponding to the acoustic logging curve; establishing a cross plot according to the corrected acoustic logging curve and a neutron gamma curve obtained by analyzing measured data; based on the cross plot, a gas reservoir fitting curve is obtained, and the gas reservoir fitting curve is used for recognizing a gas reservoir in the coal measure strata. The accuracy of identifying the gas reservoir in the coal measure stratum can be improved.

The invention provides a gas drag reduction ship. The gas drag reduction ship comprises a ship bottom flat plate; the at least one group of gas anti-drag air injection mechanisms are arranged at the incident flow end of the inner side of the ship bottom flat plate, the number of the gas anti-drag air injection mechanisms in each group is at least one, when the number of the gas anti-drag air injection mechanisms is one, the gas anti-drag air injection mechanisms are arranged on the middle longitudinal section line of the ship bottom flat plate, and when the number of the gas anti-drag air injection mechanisms is multiple, the gas anti-drag air injection mechanisms are arranged on the middle longitudinal section line of the ship bottom flat plate. The multiple gas resistance-reducing air injection mechanisms are symmetrically arranged relative to the middle longitudinal section line of the ship bottom flat plate, and the gas resistance-reducing air injection mechanisms inject air through the through holes in the ship bottom flat plate; each gas resistance-reducing gas injection mechanism at least corresponds to one flow guide cover, the flow guide covers are arranged in the through holes of the ship bottom flat plate and located on the outer side, a narrow slit is formed by the flow guide covers and the ship bottom flat plate, and the narrow slit is used for allowing gas to be injected out and enabling the gas to flow along the ship bottom flat plate. According to the gas resistance reduction ship, the projection of the gas resistance reduction air injection device in the ship width direction does not need to cover the whole ship width, and the whole ship width coverage of a gas layer can be achieved.

The invention discloses a deep sea ultra-shallow gas layer drilling shaft multiphase flow obstacle risk prediction method, and relates to the technical field of petroleum and natural gas engineering, and the method comprises the following steps: building a shaft-sedimentary layer heat-force-solid-chemical multi-physics field coupling model and a 3D model, setting initial boundary conditions, and dividing grids; model parameters are input, a finite element method is used for solving a multi-physics field coupling numerical value, and the gas invasion amount and the hydrate blocking rate are calculated; analyzing a gas invasion-migration-pressure evolution mode; researching the secondary generation and deposition characteristics of the hydrate; establishing a risk assessment system based on the parameters to divide risk levels; a historical data verification model is selected, and when the deviation rate exceeds 15%, parameters are optimized and solution is carried out again. According to the method, the defects of traditional single-field analysis are overcome, the multi-phase flow obstacle risk prediction accuracy is improved, intervention guidance is provided, model verification guarantees stability, safe and efficient mining of the deep sea ultra-shallow gas layer is assisted, and related development technology progress is promoted.

To provide a gas barrier film that facilitates replacement with a mono-material and has excellent productivity.SOLUTION: A gas barrier film 1 includes: a substrate layer 10 containing polypropylene or polyethylene as a main component; and a gas barrier layer 20 formed on a first surface 10a side of the substrate layer 10. A composition ratio H / Si of hydrogen to silicon, measured by Rutherford backscattering analysis and recoil scattering analysis, is more than or equal to 1.0 at a position of the gas barrier layer 20 equivalent to 25% of a film thickness of the gas barrier layer 20 from the first surface 10a of the substrate layer 10 in a thickness direction of the gas barrier layer 20.SELECTED DRAWING: Figure 1

The invention provides a compressed air energy storage underground air storage device and a construction method thereof, and relates to the technical field of underground air storage, the compressed air energy storage underground air storage device comprises two air storage layers, the two air storage layers are buried underground in a U shape, the two air storage layers are in butt joint to form a square, a transverse channel is arranged between the two butt joint ends of the two air storage layers, and the transverse channel is communicated with the air storage layers. Compared with the prior art, the U-shaped gas storage layer is separated by the overhaul layer, the first gas inlet pipe and the first gas outlet pipe in each section are communicated with the second gas inlet pipe and the second gas outlet pipe, and under the action of the driving assembly, the gas storage layer is driven by the driving assembly to rotate, so that the gas storage layer can be maintained, and the service life of the gas storage layer is prolonged. The gas charging stage and the gas discharging stage can be independently carried out in each section of gas storage layer, pressure values in other gas chambers cannot be affected, alternate opening and closing can be carried out, gas is charged or discharged according to needs, and the stability of the gas storage layer is kept.

The invention relates to the technical field of two-phase flow testing, in particular to a gas-liquid hole cavity testing device and a gas-liquid hole cavity testing method. The testing device for the gas-liquid pore cavity comprises a pore cavity model, a circulating water tunnel, a gas supply and exhaust assembly and a monitoring assembly, the circulating water tunnel is internally provided with a test section with adjustable flow velocity and pressure, and the hole cavity model is arranged above the test section and is communicated with the test section; the air supply and exhaust assembly is communicated with the hole cavity model and can convey air to the hole cavity model or exhaust air from the hole cavity model so as to adjust the height of an air layer in the hole cavity model; and the monitoring assembly is used for monitoring vibration, noise and video data of the hole cavity model and / or the circulating water tunnel. According to the application, the circulating water tunnel with the flow velocity and pressure adjusting capability and the air supply and exhaust assembly are arranged, and the air layer height, pressure and flow velocity of the hole cavity model are controlled by adopting a specific parameter adjusting method, so that the influence of coupling change of multiple operating parameters of the gas-liquid hole cavity test on an experimental result is reduced.

The utility model discloses an underground separate layer gas injection tubular column which comprises a casing pipe and an oil pipe, the oil pipe is arranged on the inner side of the casing pipe, the oil pipe is provided with a plurality of packers from top to bottom, the oil pipe is provided with an injection allocation assembly along the position below each packer, and the injection allocation assemblies are aligned with a gas injection layer. Gas injection ports are formed in the positions, aligned with the gas injection layer, of the sleeve, and the injection allocation assembly is used for injecting gas into the gas injection layer and reducing the pressure of the gas; a screwed plug is arranged at the bottom end of the oil pipe. The injection allocation assembly comprises an injection allocation device, multiple air taps and a fixed connector, the multiple air taps are arranged in a stacked mode, carbon dioxide generates energy loss through multiple hole shrinkage processes, and therefore the single-layer carbon dioxide injection pressure is reduced; meanwhile, the gas nozzles are longitudinally stacked, so that gas enters from the top end of the injection allocation device and flows out from the side face of the injection allocation device after being decompressed through the gas nozzles, and the purpose of injecting gas into a gas injection layer is achieved.

According to the horizontal well guiding method based on multidisciplinary interaction verification, successful implementation of the horizontal well can be effectively ensured according to complex geological characteristics such as heterogeneity of clastic rock reservoirs and transverse changes of gas layers. In the target entering stage of the horizontal well, important adjusting nodes and reasonable well inclination angles are determined, multiple vertical positioning methods are applied, step-by-step accurate control over different node positions is achieved, and accurate target entering of the horizontal well is guided and achieved. In a horizontal section implementation stage, horizontal well drilling is guided by using a horizontal section guided sedimentary model, a three-dimensional earthquake model and a three-dimensional geologic model, so that earthquake targeted macroscopic prediction and fine regulation and control of the geologic model are realized.

A gas-layer drag reduction system applied to a large ship, and a ship. The gas-layer drag reduction system (100) comprises: a gas supply system (200), a pressure stabilizing system (300), a gas injection system (400), a monitoring system (500), and an intelligent management system (600), wherein the gas injection system (400) is configured to inject a gas into water by means of the bottom of a ship and form a stable gas layer at the bottom of the ship; the monitoring system (500) is configured to monitor operation information, gas state information, navigation environment information, ship state information and gas-layer state information of the gas-layer drag reduction system (100); the intelligent management system (600) is configured to receive feedback signals of the gas supply system (200), the pressure stabilizing system (300), the gas injection system (400) and the monitoring system (500), and send control signals to the gas supply system (200), the pressure stabilizing system (300), the gas injection system (400) and the monitoring system (500); and the intelligent management system (600) is also configured to control the gas-layer drag reduction system (100) to perform signal interaction with a ship system (110), so as to implement intelligent control. Therefore, the gas-layer drag reduction system (100) is suitable for large ships.

The invention belongs to the technical field of coal bed gas detection, and discloses a coal bed exploration logging gas reservoir identification method, which comprises the steps of data acquisition, data preprocessing, gas reservoir preliminary identification, multi-dimensional cross validation, and gas content and development value evaluation. According to the coal seam exploration logging gas reservoir identification method, firstly, association of logging, a rock core and three-dimensional seismic data is established by means of well-seismic calibration on the basis of multi-source data acquisition, then a three-dimensional cross validation closed loop is formed through rock core logging point verification and well-seismic space verification, and the precision of single well local identification is guaranteed through rock core experimental data; according to the method, seismic data are used for checking the spatial suitability of a gas reservoir, a structure height part and a fracture area, the boundary of the gas reservoir is corrected in combination with wave impedance abnormal characteristics, the limitation of traditional single rock core verification is eliminated, it is ensured that the recognition result is highly consistent with a geological structure rule, and accurate parameters are obtained through fusion of rock core actual measurement and logging inversion.

To provide a gas barrier laminate useful for producing a packaging bag and a package which are hardly burst, and are excellent in oxygen barrier property even after heat sterilized while achieving mono materialization.SOLUTION: A gas barrier laminate has a laminate structure which includes an intermediate layer having a second substrate layer and a gas barrier layer disposed on the surface of the second substrate layer, an adhesion layer, and a sealant layer in this order. The gas barrier laminate is such that: the gas barrier layer is positioned between the second substrate layer and the adhesion layer; the ratio of the total mass of polypropylene in the laminate is 90 mass% or more; and the elastic modulus of the adhesion layer obtained through predetermined processes (a) and (b) is 30 MPa or less.SELECTED DRAWING: Figure 1

The invention belongs to but is not limited to the technical field of sea area natural gas hydrate research, and discloses a system and a method for analyzing the influence of stratum elements on the reservoir forming-decomposition process of sea area natural gas hydrates. The control effect of formation elements such as lithology, granularity, formation thickness, dip angle and structural form such as wrinkles on distribution characteristics (including BSR, an overlying hydrate layer and an underlying free gas layer) of a static hydrate system and processes such as migration, aggregation or leakage of methane in the migration process of the dynamic hydrate system is researched. Specifically, the control effects of stratum elements on BSR types, high-low amplitude interaction characteristics of the BSR on a section and a plane, heterogeneity distribution of a hydrate layer and a free gas layer in a static hydrate system, methane migration-aggregation-leakage after BSR migration of a dynamic hydrate system and other processes are analyzed.

To provide a stator capable of securing insulation property to a coil winding part, while suppressing the increase of the size of the stator.SOLUTION: A stator (10) includes: a stator core (24) having a plurality of radially extending teeth parts (22); a resin insulator (16) mounted on the stator core; and a coil winding part (18) which is wound around the plurality of teeth parts through the insulator. The stator core has mounting surfaces (20A and 22A) on which the insulator is mounted, grooves (36 and 38) positioned on a side opposite to the coil winding part sandwiching the insulator are formed on the mounting surface, and gas layers (40 and 42) are formed by the grooves between the stator core and the insulator.SELECTED DRAWING: Figure 2

The utility model relates to a sliding sleeve capable of plugging water, which comprises an upper joint, an outer cylinder and a lower joint, the inner wall of the upper end of the outer cylinder is fixedly connected with the outer wall of the lower end of the upper joint, and the inner wall of the lower end of the outer cylinder is fixedly connected with the outer wall of the upper end of the lower joint; a setting ball seat is arranged in the outer cylinder in a sleeved mode, and a shear screw is arranged between the setting ball seat and the outer cylinder. The setting ball seat can be matched with the soluble ball or the ball rod assembly to block an internal channel of the setting ball seat; a plurality of through overflowing holes matched with the setting ball seat are formed in the side wall of the outer cylinder in the circumferential direction. In the construction process or in the later period of construction, water may be discharged after a lower gas layer is exploited, water drainage or water plugging operation must be performed once water is discharged from a gas well, so that the influence on the production of an upper gas layer is avoided, at the moment, a ball rod assembly matched with the sliding sleeve can be thrown from a wellhead and is locked in a setting ball seat of the sliding sleeve through pumping, and the ball rod assembly is locked in the setting ball seat. And at the moment, the sliding sleeve can block the lower air layer below, so that the production of the upper air layer is not influenced.

The invention discloses a method, a system, equipment and a medium for evaluating the gas-bearing property of a water-flooded area, and the method comprises the steps: confirming three pieces of quantitatively measured skeleton information and fluid medium information in a time domain through different minerals and fluid components, and calculating a fast neutron scattering cross section according to pulse neutron logging data; carrying out qualitative identification on the gas reservoir by combining the fast neutron scattering cross section and the stratum hydrogen-containing index; according to the fast neutron scattering cross section, the thermal neutron capture cross section, the hydrogen content index and the respective volume content, a linear equation set is established, and the simultaneous equation set is solved to obtain the content of different fluid components in the stratum. The gas reservoir evaluation method solves the problem that a conventional gas reservoir evaluation method is seriously influenced by detection depth, borehole environment, invasion, low contrast ratio and pore fluid properties, and does not depend on conventional logging curves and electrical characteristics.

The invention provides an underground gas storage chamber and a compressed air energy storage system, and relates to the technical field of underground gas storage chamber safety detection devices.The underground gas storage chamber comprises a gas storage layer, an inner layer is arranged in the gas storage layer, elastic layers are arranged on the inner wall of the gas storage layer at equal intervals, and the elastic layers are connected with the inner layer and the gas storage layer; a gas inlet pipe is fixed to one side of the top of the gas storage layer, a gas outlet pipe is fixed to the other side of the top of the gas storage layer, and mounting plates are fixed to the tops of the gas outlet pipe and the gas inlet pipe. The gas outlet pipe is detected in a segmented mode through the detection assembly, when gas leakage occurs in a certain area, the upper end and the lower end of the area are automatically closed, a gas channel is automatically cut off, the flowing direction of gas is changed through the connecting pipe and the branch pipe, and therefore it is avoided that high-pressure gas continuously leaks, and larger potential safety hazards are caused.

The present application relates to the technical field of natural gas hydrate development, and particularly relates to a method and system for identifying and predicting multiphase flow barrier risk of wellbore in ultra-shallow gas layer. The method comprises the following steps: establishing a reservoir model comprising overburden layer, hydrate layer and ultra-shallow gas layer, and constructing a one-dimensional wellbore model coupled with the reservoir model; establishing a reservoir multi-physical field model and a gas-liquid two-phase transport model in wellbore, and constructing pressure coupling source term, mass exchange source term and heat exchange source term between wellbore and reservoir; extracting multiphase flow barrier risk factors of wellbore, and calculating multiphase flow barrier risk index of wellbore by using the multiphase flow barrier risk factors; extracting hydrate secondary generation risk factors, and calculating hydrate secondary generation risk index by combining thermodynamic gating term, gas-water coexistence term and residence time term; and combining the multiphase flow barrier risk index of wellbore and the hydrate secondary generation risk index, and grading and identifying the multiphase flow barrier risk of wellbore along the depth direction and the time direction.

The large-swing high-performance sealing device comprises a shaft piece, a shaft sleeve is fixedly sleeved outside the shaft piece, a kettle opening flange is sleeved outside the shaft sleeve at intervals, and more than two groups of sealing assemblies are stacked between the shaft sleeve and the kettle opening flange along the axial direction; each single sealing assembly comprises a ring seat, an outer sealing ring is pressed between the outer circumferential wall surface of the ring seat and the kettle opening flange, a gap is formed between the inner circumferential wall surface of the ring seat and the shaft sleeve, a polytetrafluoroethylene ring is coaxially pressed on the end surface of the ring seat, and the inner wall surface of the polytetrafluoroethylene ring is tightly attached to the outer wall surface of the shaft sleeve; the gas storage ring is assembled between the two sealing assemblies and is coaxially arranged, a gas nozzle which outwards penetrates through the kettle opening flange and is communicated with an external gas source is assembled on the gas storage ring, a gap is formed between the inner circumferential wall surface of the gas storage ring and the shaft sleeve to form a gas storage space, and gas is stored into the gas storage space through the gas nozzle to form a gas layer; in actual use, the inner wall face of the polytetrafluoroethylene ring is attached to the shaft sleeve and combined with the gas layer to form sealing between the shaft sleeve and the kettle opening flange, gas isolation can be guaranteed, and the sealing structure is particularly suitable for the using situation of a large-swing enamel shaft.

The present application relates to the technical field of oil and gas reservoir development, in particular to a kind of water invasion influence degree quantitative evaluation method of water production gas well, through the overpressure recovery test carried out during oil testing to water production gas well, carry out secondary pressure recovery test, the double logarithmic curve of two pressure recovery tests is superimposed and compared, water invasion into gas layer radius is analyzed, water invasion into gas layer water volume is calculated according to water invasion into gas layer radius, finally, water body size and water invasion replacement coefficient are calculated according to water invasion into gas layer water volume. Through the method, the influence degree of water invasion of water production gas well can be more accurately quantitatively evaluated.

The application relates to an argon pressure maintaining and cooling integrated device for stainless steel pipeline welding, and relates to the technical field of metal material welding, which comprises a welding bin, the outside of the welding bin is provided with an argon pressure maintaining mechanism, the inside of the welding bin is provided with a cooling mechanism, the argon pressure maintaining mechanism comprises a gas storage tank, the outside of the gas storage tank is fixedly connected with a blower, the outside of the blower is fixedly connected to the top of the welding bin, the outside bottom side of the welding bin is provided with a filtering assembly, and the outside of the filtering assembly is fixedly connected to the outside of the gas storage tank. The application has the advantages that through an argon circulation system, the gas storage tank, the blower and the filtering assembly are cooperatively operated, the resource utilization efficiency is improved while the welding quality is ensured, argon is delivered to the welding bin by the blower to form a protective gas layer, oxygen is effectively isolated, oxidation during the welding of the stainless steel pipeline is prevented, and the welding process is efficient, environmentally friendly and economical.

The application relates to a method for decoupling primary-secondary cracking hydrocarbon generation conversion rates of organic matter based on a gold tube hydrocarbon generation thermal simulation-solid product pyrolysis experiment, which comprises the following steps: step 1, kerogen gold tube hydrocarbon generation simulation and solid product rock pyrolysis experiment data acquisition; step 2, parameterized modeling of the kerogen hydrocarbon generation process; step 3, construction of a least square model cooperatively constrained by multi-source experimental information; step 4, optimization solution under the cooperatively constrained condition of multi-source experimental information; and step 5, hydrocarbon generation conversion rate calculation. The application quantitatively characterizes the conversion rate evolution characteristics of each hydrocarbon generation process, and through conversion rate calculation on the cumulative amount of each hydrocarbon generation process obtained by decoupling, the conversion rate evolution law of the kerogen oil generation, gas generation and oil cracking process, the oil cracking gas formation and the unreactive carbon formation process with the change of the maturity can be obtained, and a quantitative basis for fine hydrocarbon generation evaluation is provided.

The utility model provides a reaction furnace and processing equipment, relates to the field of semiconductor or photovoltaic material processing, and solves the technical problem that boron atoms cannot be doped into silicon wafers due to gas leakage of the reaction furnace. The reaction furnace comprises a furnace tube assembly, wherein a first opening of the furnace tube assembly is communicated with a reaction cavity; the first flange assembly is connected with the end, provided with the first opening, of the furnace tube assembly, the first flange assembly is provided with a first gas channel and a second opening, and protective gas can pass through the first gas channel to form a gas curtain at the first opening; the second flange assembly is connected with the first flange assembly, and the second flange assembly is provided with a second gas channel and a third opening; and the furnace door can be connected with the second flange assembly and is configured to seal the third opening. By means of the structure, when the furnace tube assembly leaks, protective gas can be introduced into the first gas channel, the protective gas can form a protective gas layer, and oxygen molecules are prevented from making contact with a product.

This power storage device case (1) is provided with a case body (3) which has a top wall (31), a side wall (32) provided on the outer peripheral edge of the top wall (31), and a flange (33) provided on the outer periphery of the side wall (32), and in which a housing part (35) is provided inside the top wall (31) and the side wall (32). The case body (3) is formed from a molded body of a power storage device exterior material (1). The exterior material (1) includes: a resin base layer (11); a metal foil layer (12) that is laminated on an inner surface side of the base layer (11); a resin heat-resistant gas barrier layer (13) that is laminated on an inner surface side of the metal foil layer (12); and a resin sealant layer (15) that is laminated on an inner surface side of the heat-resistant gas barrier layer (13). The sealant layer (15) is provided with an opening (2) for exposing the heat-resistant gas barrier layer (13) in the housing part (35), and an outer peripheral edge section (21) of the opening (2) is set at the flange (33).

The present application belongs to the field of oilfield gas injection development, and discloses a multi-stage adjustable separate layer gas injection quantitative control method which can realize precise adjustment and control of separate layer gas injection. The multi-stage adjustable separate layer gas injection quantitative control method comprises the following steps: step S1: before the multi-stage adjustable injection device is put into the well, the size of the gas nozzle of the multi-stage adjustable injection device is quantitatively calculated according to the injection allocation range and the gas absorption capacity data of each gas injection layer; step S2: the gas nozzle is processed and customized according to step S1; step S3: the multi-stage adjustable separate layer gas injection device is connected, assembled and put into the well with the hydraulic pipeline, the interlayer packer and the wellhead through sealing, and the ground hydraulic controller is connected; step S4: during the separate layer gas injection process, the injection allocation device is adjusted to the size of the gas nozzle which meets the injection allocation requirement according to the gas absorption capacity test data and the gas nozzle loss chart; and step S5: after the adjustment, the actual gas injection amount of each layer is calculated and interpreted according to the gas absorption capacity test data.

The invention provides a substrate supporting piece, semiconductor film forming equipment and a heating control method, the substrate supporting piece comprises a body and a supporting shaft, the body is provided with a supporting surface used for supporting a wafer, and the body comprises a heating layer, a gas uniformizing layer and a cooling layer which are sequentially arranged from the supporting surface; a vent hole is formed in the supporting surface, extends downwards to penetrate through the heating layer and is communicated to the gas uniformizing layer; the gas uniformizing layer is communicated with an external vacuum pump through a gas channel arranged on the supporting shaft, when the wafer is placed on the supporting surface, the gas uniformizing layer can realize vacuum adsorption of the wafer, and the gas uniformizing layer can form thermal resistance to maintain a preset temperature difference between the heating layer and the cooling layer. According to the embodiment of the invention, the structure and the function of the low-temperature temperature control tray and the structure and the function of the vacuum chuck can be combined, and the wafer is adsorbed and the thermal resistance is changed after the gas uniformizing layer is vacuumized, so that the heating power can be reduced, and the purposes of saving energy, improving the temperature control efficiency and reducing the load of an external cooling device are achieved.

The invention discloses a high-pressure gas circuit breaker nozzle preparation method and a nozzle, which are applied to the technical field of high-pressure circuit breaker structure preparation, and are characterized in that a plurality of preset gradient schemes are simulated by establishing a transient coupling model, and candidate partition gradient schemes including a gas production layer, a corrosion-resistant layer and a transition layer are screened out; therefore, the influence of different partition material distribution on the short-time voltage buildup response and the accumulated damage and interface degradation rate can be directly compared and balanced; and finally, layered preparation is performed in a mold cavity according to the selected partition sequence and the material distribution table, and an original part is activated and enhanced, so that the material gradient and interface conditions obtained through simulation optimization are reproduced and enhanced in a solid part, and therefore, it is ensured that the nozzle has expected rapid pressure building and gas production capacities in the on-off transient stage; and through interlayer bonding and material compactness obtained through engineering manufacturing and interface treatment, the durability in the repeated breaking process is improved.

The invention relates to the technical field of oil and gas reservoir well completion, in particular to a gas storage sand production control method and device. The method comprises the following steps: in a gas storage well completion process, replacing drilling cuttings carried during backflushing by using a dissolvable sand consolidation liquid medicine, and plugging an annulus by using a sleeve and annulus plugging technology; and under the conditions that the gas storage is in a gas storage operation state and the operation pressure of the gas storage reaches a packer under-pressure operation pressure threshold value, the gas storage is controlled to perform well opening and gas discharging, and an oil pipe gas layer is sealed through the packer to achieve a layered injection and production operation system. By the adoption of the scheme, the sand production prevention and control facility of the gas storage can be completed during well completion.

The utility model relates to the technical field of compressor sealing, in particular to a sealing assembly for an industrial gas compressor, which comprises a compression cylinder and a sealing assembly, a sealing assembly is mounted outside the extending side of the main shaft; the sealing assembly comprises a rotating cylinder, a sealing ring and an automatic valve; a sealing ring is arranged in the rotating cylinder; a gas storage layer is arranged between the rotating cylinder and the sealing ring; an exhaust channel is arranged in the cylinder wall of the rotating cylinder; the exhaust channel comprises an exhaust port, a buffer channel and a connecting cavity; the connecting cavity is communicated with the gas storage layer; an automatic valve and an annular positioning block are arranged in the connecting cavity; the annular positioning block is fixedly arranged on the inner wall of the connecting cavity; the automatic valve is slidably mounted in the middle of the annular positioning block; the automatic valve comprises a valve core and a restoring spring; a fixing ring is arranged at the end of the valve element. According to the device, the situation that the main shaft is overheated due to pressure building caused by dead air can be avoided, and therefore the sealing effect of the compressor is improved.

The invention relates to the field of reservoir stimulation in oil and gas formations, and discloses an acidizing fracturing method for carbonate formations and application of the acidizing fracturing method, wherein the method comprises the following steps: (1) designing artificial fractures according to a target location in the fracture-vug formation and a wellbore structure after well completion, and apply of drilling-fracturing integration tool to drill inside rock as the artificial fractures; (2) sealing the artificial fractures with open hole packer and then fracturing it to create fracture network I; (3) injecting acid for acidizing fracturing treatment on the fracture network I to create fracture network II. The invention can artificially control the direction and the length of propagation of the artificial fracture to create complicated fracture network to connect more hydrocarbon reservoirs in fracture-vug formations. This can provide an efficient and reliable stimulation application to save time and cost.