105 results about "Fluid loading" patented technology

The present invention relates to surface assisted fluid loading and droplet dispensing on a droplet micro actuator. A droplet actuator is provided and includes one or more electrodes configured for conducting one or more droplet operations on a droplet operations surface of the substrate. The droplet actuator further includes a wettable surface defining a path from a fluid reservoir into a locus which is sufficiently near to one or more of the electrodes that activation of the one or more electrodes results in a droplet operation. Methods and systems are also provided.

An ejector device for ejecting droplets of fluid onto a surface includes an ejector mechanism attached to a fluid reservoir through a fluid loading plate that is configured to pierce the reservoir and channel the fluid to a rear surface of the ejector mechanism by capillary action. The ejector mechanism may have a centro-symmetric configuration with a lead free piezo actuator and may be covered by an auto-closing cover.

A microfluidic system includes a microfluidic device; and a metered fluid loading system formed integrally with the microfluidic device and configured to load a discrete metered volume of fluid into the microfluidic device upon actuation.

A method for controlling the liquid load size of a plunger lift well during the shut in time of the well to facilitate a controlled plunger rise. Intra-cycle control allows dynamic adjustments within a cycle to keep the plunger running and not stalling out or rising too fast. The method includes the steps of shutting in the well to build up pressure within the well, adjusting a size of a liquid slug within the tubing while the well is shut in, opening a valve to relieve pressure within the well and raise the plunger within the tubing, pushing the liquid slug out of the well with the plunger, and closing the valve wherein the plunger falls within the tubing. The intra-cycle adjustments include reducing the size of the liquid slug for preventing fluid loading and increasing the size of the liquid slug for controlling a rise rate of the plunger.

The invention discloses a multifunctional multi-field coupled seepage experiment device. The multifunctional multi-field coupled seepage experiment device comprises a device body, a stress field control system, a temperature field control system, a fluid loading control system and a fluid seepage measurement system. The invention further discloses seepage experiments performed on tight gas, shale gas, tight oil, shale oil, natural gas hydrate and geothermal heat in a multi-field coupled state of a temperature field, a stress field, a pore pressure field and a seepage field. The invention has the beneficial effects: the temperature and pressure needs of the tight gas, the shale gas, the tight oil and the shale oil are met, and more importantly, it meets the high temperature need of geothermal heat exploitation can be met while the low temperature need of a natural gas hydrate flow test is met; a real stratum environment is simulated, and the exploitation seepage experiments of unconventional energy resources such as the tight gas, the shale gas, the tight oil, the shale oil, the natural gas hydrate, a dry hot rock and the like can be completed respectively by using the same equipment.

A control device (1) for the movement and positioning of a coupling (26) for a marine loading system (2), comprising at least one fluid transfer line having a line end fixed to a base (21), and a moveable line end provided with a coupling (26) adapted for connection to a target duct (35), the device comprising at least three actuators (27, 28, 29) each for controlling the movement of the system in a degree of freedom, and a command interface (60) and at least one member of the group coupling/target duct or a member that is fixed relative to one at least of the members of the group coupling/target duct comprises at least one means for providing information on positioning of the coupling (33, 34), and the device furthermore comprises calculating means (41) adapted to: calculate the relative positioning of the coupling directly relative to the target duct according to the information provided by the positioning information means of the coupling, calculate control instructions to give to each of the actuators such that their combined movements result in a movement of the coupling aimed at bringing the coupling closer to the target duct, apply said control instructions to bring the coupling closer to the target duct, reiterate the three preceding steps until the coupling is presented in front of the target duct in a position for connection.

The invention relates to a ship-use low-temperature fluid loading and unloading device comprising a column, an inner arm, an outer arm, and an emergency release device. The column and the inner arm, the inner arm and the outer arm, and the outer arm and the emergency release device are connected by using rotation joints. The emergency release device comprises an upper ball valve, a lower ball valve, a hoop assembly connecting the two ball valves, and a power mechanism controlling the connection and disconnection of the two ball valves and realizing the emergency release of the ball valves. According to the invention, open-type nitrogen channels of the rotation joints are reasonably utilized, and water vapor in a nitrogen purging channel and an insulation chamber is discharged from a nitrogen outlet. Because accumulated water vapor is discharged in time by using the dry nitrogen gas, water vapor freezing in steel ball raceway is avoided, and the blockage of bearing ball rolling in the raceway is avoided. Therefore, the device can work normally in transporting of low-temperature media such as liquefied natural gas, low-temperature ethylene, and the like. With a main sealing device, a secondary sealing device, an end face sealing device I, an end face sealing device II, a nitrogen sealing device, and the like, good sealing property of the rotation joints is ensured.

The invention provides a coal and rock mass multi-field coupling integrated testing device based on a drilling bit method. The device comprises a true triaxial loading mechanism, a gas fluid loading assembly, a liquid fluid loading assembly, a tail gas/wastewater emission recycling assembly, a temperature signal collecting assembly, an electric charge signal collecting assembly and an acoustic emission signal collecting assembly; the true triaxial loading mechanism comprises a pressure chamber, four sets of horizontal loading cylinders and a vertical loading combined cylinder, wherein a pistonrod of one set of horizontal loading cylinders is of a hollow structure. Coal slag guiding pipes are arranged in a central cavity of the piston rods, the inner ends of the coal slag guiding pipes areprovided with pipe opening plug discs, the pipe opening plug discs are embedded in pressing heads, drilling machines are fixedly installed at the outer ends of the coal slag guiding pipes, and drilling rods of the drilling machines are located in the coal slag guiding pipes. The device has the ability to applying true triaxial load, can provide a 'three-high' loading environment for a coal and rock mass sample, can monitor and collect the stress, the acoustic emission, the electric charge and the temperature data in real time in the coal slag drilling process, and provides theoretical and engineering guidance for dynamic disaster prediction and prevention in deep mines.

The invention discloses a multi-field, multi-phase seepage experimental device for rock under disturbance. The experimental device comprises an axial compression loading system, a confining pressure loading system, a disturbance system, a fluid loading channel, a gas loading channel, and a gas-liquid separation and collection system. The axial compression loading system is used for applying an axial compression to a rock test piece. The confining pressure loading system is used for applying a confining pressure to the rock test piece. The disturbance system is used for providing different amplitude and different frequency disturbance for the rock test piece. The fluid loading channel is used for injecting liquid into the rock test piece. The gas loading channel is used for injecting gas into the rock test piece. The gas-liquid separation and collection system is used for separating and collecting the gas and the liquid passing through the rock test piece. According to the multi-field,multi-phase seepage experimental device for the rock under the disturbance, a pump is dual-purpose, so that the resources are saved, meanwhile, a deformation disturbance rod is added inside a conventional pressure chamber, transverse disturbance is achieved through a vibration exciter, and the disturbance effects of the rock and the influence of the multi-phase fluids on the rock permeability canbe simulate realistically in the actual engineering. The correlation coefficient and the permeability evolution law of the rock in the actual engineering can be obtained more accurately by controllingthe confining pressure and the osmotic pressure.

The invention discloses a special rotating joint for an ultra-low-temperature fluid loading and unloading arm. The rotating joint comprises an inner ring and an outer ring, wherein a steel ball raceway is arranged between the inner ring and the outer ring; a steel ball is arranged in the steel ball raceway; the left end of the outer ring is connected with an outer ring flange; the right end of the inner ring is connected with an inner ring flange; a nitrogen circulation sweeping mechanism is arranged at the steel ball raceway between the inner ring and the outer ring; a main sealing ring is arranged between the inner wall of the outer ring flange and the outer wall of the inner ring and is connected with a butterfly-shaped spring between the outer ring and the inner ring through a pressure graph; a method for separating a sealing material from a compensation piece is adopted; the main sealing ring is a tendon-groove combined type sealing ring. In an ultra-low-temperature environment, the rotating joint is still high in compensation property even if the sealing piece is contracted in cold, and the sealing reliability is guaranteed, so that the problem of leakage caused by poor sealing of a conventional rotating joint is thoroughly solved, and real zero leakage is realized.

The invention discloses an experimental device and method for evaluating drilling fluid anti-collapse performance. The device comprises a simulated well wall, a fluid loading tank, a simulated drilling tool, a circulating pressure pump, an injecting pressure controller and a computer. The simulated well wall comprises a cylinder body, a heating sleeve, a temperature controller, a solid column, a handle and a covering block. The exterior of the cylinder body is sheathed with the heating sleeve. The heating sleeve is connected with the temperature controller. The cylinder body is provided with ascale line. The solid column is sheathed in the cylinder body. The solid column is provided with the handle. The simulated drilling tool penetrates through a sealing cover and is extended into the cylinder body. The sealing cover is provided with a backflow hole. A backflow pipeline is connected with the backflow hole and the fluid loading tank. A section of a water feeding pipeline is connectedwith a fluid loading pipe, and the other end is connected with the simulated drilling tool after connected with the circulating pressure pump. The side wall of the simulated well wall is provided withan injecting pressure stopper. The injecting pressure stopper is connected with the injecting pressure controller. The circulating pressure pump, the injecting pressure controller and the temperaturecontroller are connected with the computer. The device is capable of evaluating the effect of drilling fluid to well wall stability of washing the well wall in a circulating process, and providing technical support for well wall stability research in a well drilling process.

The invention discloses an emergency release device for a low-temperature fluid loading and unloading arm. An upper valve element of an upper valve body of a self-sealing valve and a lower valve element of a lower valve body of the self-sealing valve are oppositely arranged in an abutting manner. When a clamping hoop assembly is separated, clamping force applied to the upper valve body of the self-sealing valve and the lower valve body of the self-sealing valve disappears, the emergency release device starts to be released under the gravity effect of the self-sealing valve lower valve body, in the release process, valve ports are gradually sealed through the valve elements under the work effect of reset springs and a fluid medium, the sealing performance after separation can be effectively guaranteed, and the emergency release device is compact in structure and low in weight. The structure that the upper valve body of the self-sealing valve and the lower valve body of the self-sealing valve are fixed through the clamping hoop assembly is adopted so that the small drive force and the short drive stroke can be guaranteed. Three slopes are integrated on a push block so that the corrective logic and the reliable action of separation can be guaranteed. The measures that the overall weight of the emergency release device is reduced, and process threaded holes are formed in the valve bodies are taken, so that the self-recovery workload of the emergency release device after separation is reduced.

The invention discloses a telescoping bank foundation LNG filling arm which comprises a traction device, a rail, rollers and an LNG filling arm body. The LNG filling arm body comprises an LNG liquid-phase arm and an LNG gas-phase arm, and the LNG liquid-phase arm and the LNG gas-phase arm are both telescoping filling pipes. The rail is arranged along a bank slope of a bank foundation, and the rollers are arranged in the rail. The LNG liquid-phase arm and the LNG gas-phase arm are both connected with the rollers. The LNG liquid-phase arm and the LNG gas-phase arm are pulled by the traction device through a steel wire rope to move back and forth along the rail, and finally expansion and contraction of the LNG filling arm body are completed. According to the telescoping bank foundation LNG filling arm, fluid loading and unloading work can be carried out on a ship located at any water level, the security coefficient is high, leakage is not prone to happening, and cold energy losses are low.

The invention discloses an oil well cavitation method physicochemical heat blockage relieving technology. A fluid container or a fluid loading tank truck, a heating pump truck, a fluid storage tank, an injection pump truck and a wind pressing truck are sequentially connected through a pipeline. A system is implemented in the manner that blockage relieving fluid is heated and pumped into an inlet device to be injected through a well mouth; the heating temperature is set to be the design temperature and is higher than the temperature of a scaling and paraffinning point; the blockage relieving fluid is heated through the heating pump truck, the chemical reaction speed of the blockage relieving fluid is increased, and physical heat washing is carried out on a blockage; and at the final period of the pumping process, gas is mixed in the blockage relieving fluid through the wind pressing truck, meanwhile, the blockage relieving fluid is heated, the gas heating, expanding, overflowing and debacle process happens in a shaft and a stratum, and the chemical blockage relieving is assisted through cavitation. The physical blockage relieving technology and the chemical blockage relieving technology are organically combined, and the overall blockage relieving effect is improved. The design is novel, the technology is simple, construction is convenient, one-time investment is low, viscosity reduction, paraffin removing and preventing and blockage relieving are carried out on an oil well, and the oil well chemical method blockage relieving effect is improved.

The invention relates to a gas flow measuring method. The principle of the method is that fluid loading is generated on a measuring device by gas under specific velocity distribution in a pipeline, the measuring device deviates from the initial position and swings under the action, and then the average deflection angle of the device deviating from the initial position is measured, so that the relations between the average deflection angle and gas flow rate and corresponding volume flow rate are obtained. Compared with the prior art, the method has the advantages that measuring range ratio is large, the method is suitable for pipelines with large diameters, blocking and abrasion can not be caused easily, permanent pressure loss is small, installation is convenient, the influence of the stained degree of a measured medium is small, only a short straight pipe section is required, and the method is adaptable to a pipeline with a certain inclination angle, suitable for pipes with large diameters, and especially suitable for measurement of the gas flow of large-diameter gas pipelines and smoke pipelines.

The invention discloses a manual lifting mechanism for a fluid loading arm for a ship on a wharf. The manual lifting mechanism comprises a rack, wherein a rope sheave wound with a steel wire rope is arranged on the rack, a rope sheave shaft is arranged in the center of the rope sheave and fixedly connected with a driven shaft, a ratchet wheel is further arranged on the rope sheave shaft, a first gear is arranged on the driven shaft, a pawl corresponding to the ratchet wheel is arranged on the rack, the first gear is connected with a second gear through teeth, the second gear is arranged on a driving shaft, and a hand wheel is fixedly connected to the tail end of the driving shaft. According to the manual lifting mechanism for the fluid loading arm for the ship on the wharf, the rope sheave rotates when the hand wheel is rotated, and the pawl is shifted on the ratchet wheel; when the hand wheel rotates reversely, the pawl enters teeth of the ratchet wheel, so that the rope sheave is prevented from rotating reversely, and safe operation is guaranteed.

The invention discloses a device for applying an oscillatory constant fluid shearing force to anchorage-dependent cells, which comprises a microliter injector, connecting tubes, a small fluid chamber, an oscillatory fluid loading device and a single chip, wherein the microliter injector is connected with a fluid inlet and a fluid outlet at one end of the small fluid chamber through one connecting tube; the other connecting tube is connected with the fluid inlet and the fluid outlet at the other end of the small fluid chamber and is inserted into a fluid storage bottle; and when the oscillatory fluid loading device works, the injection volume and injection speed of the injector can be uniformly and accurately controlled, so that the flow rate and oscillation frequency of reciprocating fluid in the oscillatory fluid loading device are controlled. The device of the invention has a simple structure, is convenient to operate, can form a sealed environment and also can prevent the pollution of bacteria and adjust the oscillation frequency and the magnitude of the shearing force in experimental research.