1778 results about "Injection pressure" patented technology

A system and method for treating bone abnormalities including vertebral compression fractures and the like. In one vertebroplasty method, a fill material is injected under high pressures into cancellous bone wherein the fill material includes a flowable bone cement component and an elastomeric polymer component that is carried therein. The elastomer component can further carry microscale or mesoscale reticulated elements. Under suitable injection pressures, the elastomeric component ultimately migrates within the flowable material to alter the apparent viscosity across the plume of fill material to accomplish multiple functions. For example, the differential in apparent viscosity across the fill material creates a broad load-distributing layer within cancellous bone for applying retraction forces to cortical bone endplates. The differential in apparent viscosity also transitions into a flow impermeable layer at the interface of cancellous bone and the flowable material to prevent extravasion of the flowable bone cement component.

The invention relates to a hydraulic fracturing anti-reflection technology for pumping and exploring gas by drilling a hole in a coal mine well, comprising the following steps sequentially: (1) selecting a fracturing location; (2) determining the pressure type according to observed coal type, laneway arrangement and construction development degree, and ways of top soleplate bedding plane borehole hydraulic fracturing, top soleplate translamellar borehole hydraulic fracturing, the coal bed bedding plane borehole hydraulic fracturing or the coal bed translamellar borehole hydraulic fracturing can be adopted; (3) determining borehole parameters for constructing drilling, wherein, the borehole parameters include borehole length, borehole height, aperture, obliquity angle and azimuth angle; (4) designing the hydraulic fracturing, including injected water volume and injection pressure; (5) borehole washing; (6) draining; (7) examining the fracturing effect, if the fracturing effect is in accordance with the requirement, the following step is carried out, if not, turning to step (4); and (8) entering a pipeline for pumping and discharging. The technology enhances the air permeability of the coal bed, reduces the gas emission rate of an excavation working face, and obviously promotes the pumping and exploring capability and the pumping and exploring effect of the single borehole. The pumping and discharging efficiency is improved, the pumping and discharging time is shortened and the damage of the gas is maximally eliminated.

In fuel injector including an accumulator and an intensifier, fuel is injected such that an injection control valve and a piston control valve are individually controlled, an operational phase difference therebetween is regulated, and at least one of a maximum injection pressure, a rate of increase of an injection pressure at the start of an increase of pressure, a rate of decrease of the injection pressure at the completion of injection, a pilot injection pressure, and an after injection pressure of fuel injected from a fuel injection nozzle is arbitrarily changed. Namely, a pressure during a movement from a base common rail pressure of the accumulator to a static maximum pressure statically determined by an operation of the intensifier is positively used as a control factor of injection, whereby a fuel injection pattern can be implemented with an extremely high degree of freedom.

Rather than developing full closure tonnage for a substantial portion of the duration of an injection cycle, closed loop control of the clamp pressure (such as through control of hydraulic pistons) permits clamp pressure to balance exactly, but preferably slightly exceed, the instantaneous injection pressure. A first approach mimics the injection pressure profile with time, whereby applied tonnage is varied with time according to sensed pressure measurements. A second approach looks to pre-stored or historically accumulated injection pressure information and, instead of varying the tonnage, applies a constant tonnage reflecting the maximum recorded or most likely injection pressure to be experienced in the mold (as recorded stored in a look-up table associated with the particular mold configuration). A machine controller (80, 82) causes the application of applied tonnage through the platen (16, 17) and tie-bars (19, 20) of an injection molding machine (10). Pressure sensors (66-74) located either on a mold surface (50), relative to stack components (58-64) and/or relative to a force closure path of permit a microprocessor (82) to control applied clamp closure tonnage. In this way, the system consumes less power and component wear is reduced.

The invention relates to a degradation disposable syringe and a method of preparing the syringe. The syringe includes an outer cover, a core pin, a needle seat and a needle cap, which can be degraded in the natural environment. The basic material for degradation is prepared with degradable polymer main material, plasticizer, stabilizer, stabilizing additive and filling compound, etc. The detailed injection molding process for all parts of the syringe is: the injection temperature for a feeding opening is 20 to 60 DEG C; the injection temperature for a compression section is 100 to 200 DEG C; the injection temperature for a measurement section is 130 to 240 DEG C; the injection temperature for a spray nozzle is 130 to 220 DEG C; the mold temperature is 20 to 50 DEG C; the injection pressure is 40 to 200MPa; the injection time is 8 to 90 seconds; the pressure holding time is 0 to 5 seconds; the screw speed is 20 to 180 r/m; all performances of the degradation syringe totally meet the national standard (GB15810-2001). After being abandoned, the syringe does not pollute the environment, prevents illegal recycling, and can totally replace the disposable polyolefin syringes.

The invention relates to the field of geothermal exploitation and provides a method for self-circulation exploitation of geothermal energy of hot dry rock with multilateral well and volume fracturing technologies. According to the method, firstly, multilateral well holes are drilled in different depths of a reservoir of the hot dry rock, the reservoir between upper and lower multilateral well holes is fractured with the volume fracturing technology, a high-permeability hot dry rock reservoir is constructed, and finally, thermal-carrying media are injected and exploited for geothermal exploitation. Annularly-injected low-temperature thermal-carrying media flow to the fractured reservoir of the hot dry rock along the multilateral well holes in the upper part of the reservoir, flow to the multilateral well holes in the lower part under the double actions of injection pressure and potential-energy difference and finally flow back to the ground along an oil pipe. According to the method, the multilateral well and fracturing technologies are sufficiently utilized, the reservoirs of the hot dry rock are effectively communicated, the problem about crack communication during conventional double-well fracturing for injection and exploitation is solved, the potential-energy difference in different depths can be further effectively utilized, and the flowing capability of the thermal-carrying media is greatly improved. With the use of the thermal insulation oil pipe, the thermal loss in the exploitation process of the thermal-carrying media is further reduced, and the exploitation efficiency of geothermal energy is improved.

A new approach is disclosed for measuring the pressure of tight gas reservoirs, using information obtain from continuous injection prior to hydraulic fracture stimulation. The technique can be obtained utilizing either bottom-hole or surface pressure gauges and properly instrumented surface injection pumps. The analysis is completed by plotting injection and rate data in a specialized form from terms arranged in Darcy's radial flow equation to obtain a curve or trend. The key component to proper application of this technique is to obtain both baseline and one or more calibration data sets. These calibration data sets are obtained by either increasing or decreasing the injection pressure and/or rate from the baseline data. Initial reservoir pressure is assumed, but the calibration data indicates if the guess was too high or low. Accurate estimates of reservoir pressure may be obtained in a few iterations.

A control system and method for determining optimal fluid injection pressure is based upon a model of a growing hydrofracture due to waterflood injection pressure. This model is used to develop a control system optimizing the injection pressure by using a prescribed injection goal coupled with the historical times, pressures, and volume of injected fluid at a single well. In this control method, the historical data is used to derive two major flow components: the transitional component, where cumulative injection volume is scaled as the square root of time, and a steady-state breakthrough component, which scales linearly with respect to time. These components provide diagnostic information and allow for the prevention of rapid fracture growth and associated massive water break through that is an important part of a successful waterflood, thereby extending the life of both injection and associated production wells in waterflood secondary oil recovery operations.

The invention relates to a foam system suitable for profile control and oil displacement of an oil field and an oil displacement method, in particular to a foam system formula used for profile control and oil displacement of the oil field after polymer flooding and a foam profile control oil displacement method. The foam system formula comprises in percentages by weight: 0.1-0.5 wt% of surfactant, 0.05-0.4 wt% of foam stabilizer, 0.08-0.4% of thickening agent, 0.05-1.2 wt% of inorganic salt and the balance of water. In the foam profile control oil displacement method, a ratio of gas to liquid of the foam system is as follows: the volume ratio of gas to liquid is 0.4: 1-1: 1 under an injection pressure. The foam system, provided by the invention, has super strong foam performance and ultra-low interface tension. The foam profile control effect is remarkable after polymer flooding, the yield is improved for more than 20%, and the economic benefit is remarkable.

The invention relates to a method to prepare high volume fraction silicon carbide particle to enhance copper matrix composite, belonging to the field of metal matrix composites. The technique is that: proper blended particle size distributed SiC powder is mixed with polymer component paraffin base binder in a volume proportion of 57-68% load in sudarpress, fine blended feedstock is obtained; injection mold in powder injection molding machine in the injection temperature of 150-175 DEG C and the injection pressure of 75-125MPa to obtain a required billet, the billet is degreased in a solution-doff + thermal-doff process, and is first sintered in 600-1120 DEG C to obtain pre-molded billet of porous SiC. Infiltrate copper alloy to the porous SiC pre-molded billet in the temperature of 1400-1450 DEG C in vacuum via non-pressure infiltration. So the high volume fraction SiC_p/Cu composite is obtained. The invention can prepare intricate shaped thin wall SiC_p/Cu composite parts, enhance the content of phase as high as 57-67% volume fraction, the density of the composite is high, the microstructure is evenly distributed, and the invention has the advantages of high utilization rate of material, high productivity, and low production cost.

A steam/water mixed dishwasher using steam and water together, and, more particularly, a dishwasher and dishwashing method of achieving improvement in washing performance and efficiency via direct steam injection to dishes. The dishwasher includes a body containing a dishwashing tub, at least one dish basket disposed in the dishwashing tub and adapted to receive dishes therein, a steam generator to generate steam by heating wash water, and steam injection nozzles to inject the steam generated from the steam generator. The steam injection nozzles are disposed at the same height as a lower surface of the dish basket. The dishwashing method includes injecting steam from a number of the plurality of steam injection nozzles by opening a number of the plurality of control valves, to thereby maintain an injection pressure of the steam generated from the steam generator.

The present invention relates to a camera integrated with a connector for a vehicle and a method of manufacturing thereof, and the camera integrated with a connector for a vehicle includes: a housing; and a camera module accommodated inside the housing, in which a connector unit is formed in one piece at a certain position on one side of the housing, and a protection cover for protecting the camera module from being damaged by injection pressure and injection temperature generated when the housing is molded by injection is combined outside the camera module. The method of manufacturing camera integrated with a connector for a vehicle includes: a camera module assembly step, a camera module inserting step, an injection molding step and an extraction step.

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

A method for the production of bristles structures on an arbitrary kind of carrier using a mold tool is described having channels extending from channel walls for shaping bristles, wherein a mold mass for forming the bristles is introduced under pressure into the channels, preferentially using the injection molding technique. Towards this end, the carrier is disposed directly or indirectly onto the mold walls of the channels in such a fashion that the free cross-section of the channels is completely covered and the mold mass is subsequently introduced onto the carrier with a sufficient mold pressure (injection pressure) that the carrier is broken-through in the vicinity of the free cross-section of the channels thereby displacing the carrier material, with the carrier mass subsequently filling the channels.

The invention relates to a high-precision temporary punching type injecting transonic speed wind tunnel flow field control structure and a method. According to the control structure, a wind tunnel flow field is decomposed into a main injection pressure control portion and a total pressure-static pressure control portion, and the control structure is mainly composed of such three modules as a set value calculation model, a main injection controller and a flow field controller. In the main injection pressure control portion, a main pressure regulating valve is adopted to control the main injection pressure. In the total pressure-static pressure control portion, the total pressure and the static pressure are controlled through a main air release valve and a gate finger. The set value calculation model is formed by a one-dimensional variable cross-section tube unsteady Euler equation set, and a main injection pressure set value and a static pressure set value of a wind tunnel model are solved through computational fluid dynamics software. The main injection controller is formed by using a segmented incremental PID control algorithm, and main injection pressure at an outlet of a main ejector is regulated. The flow field controller is formed by taking a model attitude feed-forward dynamic matrix control method as a core, the total pressure of a stable section and the static pressure of a test section are regulated. The control method is good in real-time performance and high in control precision, and variations of the Mach number in a test stage are controlled to a range of 0,001.

A system for cold gas dynamic spraying of particulate material has a de Laval nozzle and two or more radial particle inlets located between the throat and the outlet of the nozzle, the two or more particle inlets arranged symmetrically around a linear flow path of the nozzle. Blocking of the inlets is reduced by controlling pressure of particle carrier gas to provide a stable particulate material injection pressure before and during introduction of working gas into the nozzle, and/or by clearing the particle inlets of residual particles after a spraying process. Such a system and associated method combines benefits of both downstream and upstream cold gas spray systems. Further, a nozzle for spraying particulate material having a cross-sectional shape that is narrower in a middle section compared to edge sections provides coatings with superior cross-sectional profiles.

Variables such as injection pressure and injection velocity are detected at a predetermined sampling cycle for each molding cycle and the variables for a plurality of past molding cycles starting from the latest molding cycle are stored. Change patterns of the stored variables of the respective molding cycles are displayed in the form of graphs in which the first axis represents time (the number of times of sampling), the second axis represents the variable values, and the third axis represents the molding cycle.

A method and a machine account for changes in material properties of molten plastic material during an injection run. A change in a control signal is calculated by a controller during the injection molding run. If the change in the control signal indicates a change in material flowability, the controller alters a target injection pressure to ensure that molten plastic material completely fills and packs a mold cavity to prevent part flaws such as short shots or flashing.

The invention relates to a pore-level simulation experimental apparatus for migration of pore-throat scale elastic microspheres in a porous medium, belonging to the field of pore-level flow simulation technology. Aiming at the pore throat characteristics of the real oil reservoir rocks and the dimension characteristics of the pore-throat scale elastic microspheres, the invention designs a microcosmic visual transparent quartz sand model suitable for the pore-throat scale elastic microspheres and constructs an image real-time acquisition and data analysis system to realize real-time observation, acquisition and quantitative analysis of the migration process of the pore-throat scale elastic microspheres, a distribution image and a remaining oil distribution image, real-time measurement of migration of the pore-throat scale elastic microspheres and injection pressure during oil displacement and measurement and analysis of output concentration, water content and oil production of the pore-throat scale elastic microspheres; the designed microcosmic visual transparent quartz sand model can reflect the pore throat characteristics of the real oil reservoir rocks, and as the model is made of transparent quartz sands through filling, the model is convenient to clean and can be repeatedly filled.

The invention discloses a supercritical carbon dioxide fracturing simulation experiment device. The device is characterized in that a pressure chamber, a vacuum saturation system and a carbon dioxide phase state transformation system are included; the pressure chamber comprises a closed cavity, flat jacks and heating rods, wherein the closed cavity is composed of an upper cover plate, a confining pressure barrel and a pressure chamber base which are sealed through a seal ring, the four flat jacks are evenly distributed on the side wall of the confining pressure barrel, the upper cover plate and the pressure chamber base are each fixedly provided with one flat jack, and the heating rods are fixed to the pressure chamber base; the vacuum saturation system comprises a vacuum pump and a saturation hydraulic station; the carbon dioxide phase state transformation system comprises a carbon dioxide gas source, a cooling device and an injection pump, and carbon dioxide is liquefied by lowering the temperature and then transformed to be in a supercritical state through pressurizing and temperature increasing. According to the supercritical carbon dioxide fracturing simulation experiment device, a supercritical carbon dioxide fracturing simulation experiment is conducted on rock and an artificial test piece under the saturated pore pressure condition, the parameters such as the injection pressure, the temperature and the output volume of fracturing fluid in the fracturing process are monitored in real time, a fracture extension rule is acquired, and the device is an experimental platform for researching the supercritical carbon dioxide fracturing mechanism.