62 results about "Stress recovery" patented technology

A multi-bath apparatus and method for cooling a superconductor includes both a cooling bath comprising a first cryogen and a shield bath comprising a second cryogen. The cooling bath surrounds the superconductor, and the shield bath surrounds the cooling bath. The cooling bath is maintained at a first pressure and subcooled, while the shield bath is maintained at a second pressure and saturated. The cooling bath and the shield bath are in a thermal relationship with one another, and the first pressure is greater the second pressure. Preferably, the cryogens are liquid nitrogen, and the superconductor is a high temperature superconductor, such as a current limiter. Following a thermal disruption to the superconductor, the first pressure is restored to the cooling bath and the second pressure is restored to the shield bath in order to restore the superconductor to a superconductive state.

The invention discloses a wireless transmission well testing system of an ultra-deep well and relates to the filed of dynamic monitoring of an oil reservoir, in particular to a device for a pressure buildup test for an oil gas production well. The proposal utilizes a ground receiving device, a cable, a supporting cylinder, a sensing system and a ball valve; the supporting cylinder is connected with the upper part of the ball valve; the outer wall of the supporting cylinder is provided with a groove; the inside of a tube is provided with a pressure transmission passage from the lower part of the ball valve to a groove of a direct-reading manometer; the sensing system comprises the direct-reading type manometer, a cell and a receiver; the direct-reading type manometer and the cell are arranged inside the groove of the outer wall of the supporting cylinder respectively; the direct-reading type manometer consists of a sensor, an A/D module, a microcontroller, a signal emitter and a transmitting coil which are sequentially connected; the receiver consists of a receiving coil, a signal receiver, a microcontroller and a signal transmitter which are sequentially connected; and the receiver is arranged inside the supporting cylinder and is connected with the ground receiving device through the cable. The proposal realizes well shutdown underground, avoids accumulation in a well cylinder, shortens the well testing period, can fully avoid causing incomplete underground pressure buildup curve by insufficient time for well shutdown, can set sampling density at any moment through a ground computer, avoids causing the loss of wire section in early stage and meets the testing requirement of well testing of the oil gas well.

The invention relates to an intensity check method based on a cabin door detail model, and belongs to the field of airplane structural intensity design. The intensity check method comprises the steps of establishing a finite element model of the cabinet door firstly, and establishing a complete structure calculation model and a damage safety calculation model of the cabinet door according to the finite element model data; then performing calculation of static force to obtain node balance force calculation, board shell unit equivalent stress calculation, beam unit stress recovery point stress calculation and calculation of axial stress between a beam unit and a rod unit; further calculating to obtain data suitable for intensity check method calculation, comprising stress check operation stress of each structure and stability calculation operation stress of each structure; and meanwhile, calculating a stress check allowable value of each structure and a stability calculation allowable value of each structure, and performing comparison between the two allowable values to obtain safety margin of each structure. By adoption of the method provided by the invention, the intensity check operation based on the cabin door detail model can be completed; and the method is simple and reliable, and working efficiency is improved.

Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure, and fluid pulsing of the RO element feed stream. The system of the invention preferably comprises a dual head reciprocating pump, an RO element, and a differential pressure activated (“DPA”) valve. The DPA valve, in combination with connecting the two pump heads to reduce required pump pressures, generates energy recovery. The frequency and amplitude of the reciprocating pump create a pulse wave in the RO element that improves permeate quality and throughput. A control system preferably monitors system parameters to optimize the reciprocating pump speed and amplitude in order to obtain maximum throughput and permeate quality from any given RO element configuration. Also a highly compact, portable RO system comprising a piston and a DPA valve. The piston separates the feed chamber from the retentate chamber. The pressure difference between the two chambers determines the pressure recovery of the system. The DPA valve opens and closes hydraulically to automatically control the retentate discharge as the system is pumped.

The invention belongs to the technical field of hard alloys, and in particular relates to a process for recycling waste tungsten-cobalt hard alloys. In the recovery process of the present invention, (1) cleaning the waste cemented carbide; (2) heating the cleaned waste cemented carbide to above 800°C, and immediately transferring it into a vacuum airtight container, and at the same time passing it into -150 Cool down the liquid inert cold medium below ℃, and the waste cemented carbide is broken into fragments; (3) Grinding and pulverizing the crushed fragments into a powder with a particle size of 2-8 μm to obtain the required cemented carbide alloy powder. The recovery process of the present invention utilizes the stress change difference caused by the rapid temperature difference to force the hard alloy to overcome its own strength and break into small particle size fragments, and because the low temperature of liquid nitrogen can reach -180°C, the hard alloy is forced to The high-quality alloy is broken into fragments with smaller particle sizes, and the step of grinding and crushing with smaller particle sizes can be directly carried out without secondary mechanical crushing, and the process is simple.

The invention discloses a deep-water composite conduit tripping-in tubular column and an underwater mounting method thereof. The underwater mounting method comprises the steps that after the deep-water composite conduit tripping-in tubular column is connected with a drilling platform, a drain valve is opened; the deep-water composite conduit tripping-in tubular column is delivered to the seabed, and when the lower end of a conduit column body makes contact with the seabed mud surface, a jetting tripping-in procedure is started; when the jetting tripping-in procedure is conducted with maintained predetermined hydraulic jet parameters, the hook hanging load is gradually decreased, and thus part of tubular column loads are applied to a bucket foundation; meanwhile, water pumping power in the bucket foundation is increased, and pressing-in of the bucket foundation is achieved while jetting tripping-in of the deep-water composite conduit tripping-in tubular column is achieved; and when complete tripping-in of the bucket foundation is achieved, the drain valve is closed, and tripping-in of the deep-water composite conduit tripping-in tubular column is achieved. According to the deep-water composite conduit tripping-in tubular column and the underwater mounting method thereof, the waiting time of stress recovery of the deep-water composite conduit tripping-in tubular column can be omitted, and the tripping-in length is reduced.

The invention discloses a high temperature and high pressure gas well wellhead pressure measuring adaptability discriminating method. The method is characterized by measuring a gas productivity index PI and a production pressure difference delta P of a gas well, wherein if PI is less than 1.25+0.6174delta P, the wellhead pressure measuring data is available, and the wellhead pressure measurement can be used for substituting the bottom pressure measurement; if PI is more than or equal to 1.25+0.6174delta P, the wellhead pressure measuring data is not available, and the bottom pressure measurement cannot be substituted by the wellhead pressure measurement. The method has beneficial effects that a simple rule for discriminating the dynamic normality of the wellhead pressure in a pressure restoration test is determined by studying the occurrence condition of the dynamic abnormality of a wellhead, a discrimination relation applicable to the wellhead pressure restoration test is established, and evidence is provided for selecting a test scheme.

The invention discloses a method for determining physical properties and crack characteristic parameters of oil and gas reservoirs with layered fracturing and commingling production. The method comprises the following steps of selecting a well with layered fracturing and commingling production as a target well, collecting and sorting basic information of the well and carrying out a shut-in pressure recovery test on the well; according to a weight coefficient determined by the product of the effective thickness of each small layer and the adding amount of sand, carrying out small-layer splitting on the commingling production output of the well; selecting common business well test software, reading pressure recovery test data and drawing a double logarithmic curve of actually measured pressure and pressure derivatives; selecting a fractured well test interpretation model to carry out well test fitting interpretation on each small layer and obtaining the characteristic parameters of eachsmall layer. The method can accurately obtain the physical properties of the small layer reservoirs and the artificial crack characteristic parameters of the well with layered fracturing and commingling production and can provide a data support for efficient development and the like of the oil and gas reservoirs.

The invention relates the technical field of photovoltaic scavenging machines, in particular to an intelligent photovoltaic scavenging machine posture adjusting method. The method comprises the steps that S101, pressure borne on road wheels is detected through pressure sensors arranged on the two road wheels respectively and is recorded as F1 and F2; S102, the inclining state of an intelligent photovoltaic scavenging machine is determined by comparing the F1 with the F2, and S104 is conducted if the F1 is equal to the F2; S103, the rotating speed of an upper walking motor and a lower walking motor is adjusted according to the inclining state of the intelligent photovoltaic scavenging machine, and then the procedure returns to the S101; S104, the procedure is finished. After the method is adopted, the pressure borne on the road wheels is detected, and when the borne pressure difference is judged to be up to a certain limiting value, the pressure borne on a suspension wheel is made to return to a balance state by adjusting the rotating speed of the lower walking motor through a control system, and the purpose for adjusting the walking posture is achieved.

The invention provides anti-impact protection apparatus of an ultraviolet sterilizer. The apparatus comprises a metal cylinder and an ultraviolet lamp with a quartz sleeve, the metal cylinder is provided with a water inlet and a water outlet, a pipeline connected with the water outlet is provided with a check valve, and a pressure sensor, a programmable logic controller (PLC), an intelligent controller and a magnetic switch device are arranged on the metal cylinder. According to the apparatus, the pressure sensor and the PLC are used for identifying whether backflow or water hammer occurs or not; when the pressure value exceeds a set range, the PLC sends a signal to the intelligent controller to control the closing of the magnetic switch device; and when the pressure is recovered to the set range, the PLC sends a signal to the intelligent controller to control the opening of the magnetic switch device. According to the anti-impact protection apparatus, the quartz sleeve can be effectively protected, so that the situation that the ultraviolet sterilizer cannot normally work and safety of water quality is influenced due to the fact that the quartz sleeve is broken is avoided.

The object of the present invention is to provide an apparatus and method for forming a deposited film which can repeatedly form a large amount of functional deposited films with good reproducibility without degradation in the characteristics of films formed even when gas leakage occurs in a shut-off valve, and without reducing the yield as a result when gas leakage occurs in the shut-off valve, by immediately detecting and repairing it. The deposited film forming apparatus according to the present invention comprises: a chamber capable of maintaining an interior thereof under vacuum; a source gas supply piping for supplying a source gas into the chamber; an evacuation system piping for evacuating the interior of the chamber; a gas supply piping for use in opening to atmosphere, for supplying a gas for returning a pressure within the chamber to atmospheric pressure, wherein a plurality of shut-off valves are provided in series between a gas source of the gas for returning the pressure within the chamber to the atmospheric pressure and the chamber, and a pressure-gauge and/or evacuating means are provided between the plurality of shut-off valves.

The present invention relates to a strength checking method based on cabin door detail door, and belongs to the field of airplane structure strength design. The method comprises: firstly, establishing a finite element model of a cabin door, and constructing a complete structure calculation model and a a breakage safety calculation model of the cabin door according to data of the finite element model; then, carrying out static calculation, so as to calculate node equilibrium force, equivalent stress of a shell element, stress of a stress recovery point of a beam element and axial stress between the beam element and a rod element; further carrying out calculation to obtain data applicable for calculation by the strength checking method, comprising stress checking work stress of each structure and stability calculation working stress of each structure; and calculating a stress checking allowable value of each structure and a stability calculation allowable value of each structure, and comparing the two values to obtain a safety margin of each structure. The method provided by the present invention can help complete strength checking based on a cabin door detail model, and the method is simple and reliable, and improves working efficiency.

The invention discloses a method of pre-metal dielectric (PMD) stress recovery. The PMD possesses a contact hole and the contact hole is just cleaned. The method comprises the following steps: irradiating the PMD by using an ultraviolet lamp; measuring a first wafer flexibility after the PMD is generated and a second wafer flexibility when ultraviolet irradiation is performed; comparing the first wafer flexibility with the second wafer flexibility; stopping the ultraviolet irradiation if a flexibility difference is less than 10 micrometers, otherwise, continuing the ultraviolet irradiation. By using the invention, a problem of stress loss caused by the PMD which absorbs water during a conductor device manufacture process can be effectively solved; the water absorbed by the PMD during technology links, such as chemically mechanical polishing, cleaning and the like, can be effectively removed so that stress of the PMD can be recovered; performance of a manufactured semiconductor device can be raised. The method of the invention has advantages of low implementation costs, simple processes, short processing time, economy, high efficiency and utility.

A system and method for the structure and operation of a work exchanger system in a reverse osmosis plant is disclosed. The work exchanger system is characterized by a an array of multiple work exchanger chambers each being individually controlled and operated to a meet an aggregate need of pressure recovery by the entire system. Each work exchanger chamber is characterized by at least one valve having a bypass system which is configured to equalize pressure on both sides of the valve. Such an equalizing process's delays are monitored and controlled by the central systems' controlling system to create no restrictions to reject high pressure brine flow in a reverse osmosis system at any given time.

A method, apparatus and computer program product are provided for determining stress recovery based on chest and abdominal breathing information from a detection device such as a radar detection device. Stress recovery may be determined by monitoring a phase difference between chest and abdominal breathing relative to a stress indicator, such as heart rate variability. Target respiration information may be determined and/or calibrated for the particular user based on the stress indicator. Breathing exercises may be provided to the user to assist in steadying their breathing and recovering from stress. Based on the monitoring of the chest and abdominal breathing information, efficacy of the breathing exercise may then be determined based on whether the user is recovering from stress, and further feedback may be provided to the user.

The invention discloses a pipeline burst prevention valve. The pipeline burst prevention valve is provided with pressure buffer cavities, when the pressure intensity in a pipeline is too large, the valve can automatically guide fluid into the buffer cavities inside the valve, so that the pressure intensity in the pipeline is reduced, and then the pipeline is protected and prevented from bursting;the two pressure buffer cavities are arranged, when the pressure in the first-stage buffer cavity exceeds the pressure regulation and control limit, the fluid can be guided into the second-stage buffer cavity, so that the pressure regulation capability of the pipeline burst prevention valve is improved; and an information feedback function is achieved, signals can be rapidly fed back to an alarm information device for alarming, and the arranged pressure buffer cavities can guide the fluid in the cavities back to a main pipeline in time when the pipeline pressure recovers to be normal, so thaton one hand, resource waste and maintenance cost are avoided, and on the other hand, the situations that the external environment is polluted and harmed and even personnel poisoning and death are caused due to the fact that toxic and harmful substances in the pipeline leak to the outside are avoided.