2028 results about "Fluid pressure" patented technology

An auto-occlusion safety device is provided for use in preventing rupture of infusion components during rapid infusion procedures. An occlusion valve is disclosed having a threshold pressure that is less than a rupture tolerance of the infusion system components. As the fluid pressure of the infusion system increases beyond the threshold pressure of the occlusion valve, the occlusion valve is automatically activated thereby occluding fluid flow upstream from a vulnerable infusion component. An accumulator is further disclosed for use in combination with the safety device to compensate for time delays in full activation of the occlusion valve.

A plunger pump packing assembly includes a header ring, and one or more seals. The plunger pump packing assembly operates as a scal between a static component and a dynamic component (e.g., reciprocating plunger). The header ring has a vented inside portion to prevent trapping pressure on the outer diameter of the header ring or between the header ring and adjacent seals or packing rings. The vents allow trapped pressure to return when the pumped fluid pressure is lower. A radially protruding edge on the outer diameter of the header ring significantly reduces or prevents migration of abrasive media, such as proppant, between the header ring and the static component. In some examples, the header ring does not contact the dynamic component, thus preventing the trapping of abrasive media particles between the header ring and the surface of the dynamic component.

The invention provides a hydraulic fracture evolution simulation method and device and electronic equipment.The hydraulic fracture evolution simulation method comprises the steps that a damaged rock mass is divided into a plurality of different calculation areas, and a seepage control equation of each calculation area is determined; in combination with seepage anisotropy, determining a seepage tensor of porous medium seepage-stress coupling in each calculation area; associating the seepage control equations of all the calculation areas with phase fields to obtain a target seepage control equation; and determining the displacement, fluid pressure and phase field of the damaged rock mass based on the target seepage control equation. Through the deduced seepage-stress coupling phase field model, the strain energy is decomposed through spectral decomposition, it is guaranteed that crack propagation occurs under the energy generated by tensile strain, and the problem that an existing hydraulic crack research method is limited is solved.

A method and a device for determining fracture closure pressure based on hydraulic fracturing are provided. The method includes: determining a leak-off volume of a fluid during a refrac cycle according to a fluid pressure during the refrac cycle; generating a stiffness change curve during the refrac cycle according to the leak-off volume of the fluid and the fluid pressure; and determining the fracture closure pressure according to the stiffness change curve. A hydraulic coupling mechanism and change characteristics during a pressure attenuation process are quantitatively characterized, and characteristic response corresponding to a pressure drop curve before and after the fracture closure are accurately described, thereby providing a method and a device for determining fracture closure pressure with clear physical significance and objective effectiveness.

The invention discloses a stop valve, and relates to the field of valves. A stop valve comprises a valve seat, a valve cover, a support, a lead screw and a sealing valve column, the liquid inlet end and the liquid outlet end of the valve seat are fixedly connected with liquid conveying pipelines on the two sides through flange plates and bolts respectively, the valve cover is fixedly installed on the valve seat through bolts, the support is fixedly installed on the valve cover, the sealing valve column is arranged in the valve seat, and the lead screw is fixedly installed on the support. The lead screw is fixedly connected to the upper end of the sealing valve column, the upper end of the lead screw upwards penetrates through the valve cover, and the double-opening sleeve is rotationally connected to the support; the operation difficulty of resisting fluid pressure when the valve is opened manually is effectively reduced, the downward pressure of fluid becomes assistance during closing, a worker only needs to reversely rotate the rotating wheel to achieve smooth downward movement of the sealing valve column, operation is convenient and fast, tighter sealing can be achieved through the fluid pressure, and the reliability after the valve is closed is improved.

A dropper seatpost includes an outer tube and an inner tube disposed in the outer tube and having a first oil chamber and a second oil chamber connected to the first oil chamber. A fluid chamber is provided between the top and bottom ends of the inner tube. A pressure adjustment member is disposed in the first oil chamber to push the oil from the first oil chamber to the second oil chamber. A floating piston is disposed between the second oil chamber and the fluid chamber and pushed by the oil stored in the second oil chamber to compress the high-pressure fluid stored in the fluid chamber. Thus, the present invention allows a user to conveniently adjust pressure of the high-pressure fluid. The arrangement of the first and second oil chambers does not significantly compromise the structural integrity of the inner tube, ensuring that it provides effective support.

The invention discloses a reverse anti-blocking check valve, and relates to the technical field of valve bodies, the reverse anti-blocking check valve comprises a check valve body, and an expansion part is arranged on the surface of a valve plate, facing the fluid direction, of the check valve body; the expansion component comprises a bearing column fixed to the center axis of the surface of the valve plate, and a limiting ring is fixed to the axial top end of the bearing column. The expansion part is arranged on the incident flow side of the valve plate, the dynamic response function in the valve opening and closing process is achieved, when fluid is impacted in the forward direction, the expansion part is unfolded under the fluid pressure effect, the contact arc plate is automatically attached to the inner wall of a pipeline, an auxiliary sealing ring is formed, and the sealing performance is effectively improved; when the fluid pressure is weakened, the expansion component retracts by means of the spring, so that the contact arc plate is separated from the inner wall of the pipeline and generates relative motion, the cleaning effect similar to that of a scraper is achieved, dirt attached to the pipe wall and the surface of a key structure can be effectively peeled off, and the self-cleaning capacity and the anti-blocking effect of the valve are improved.

The invention discloses a high-precision anti-interference pressure transmitter, and relates to the technical field of anti-interference pressure transmitters. Comprising a pressure data acquisition module, a data preprocessing and integration module, a pressure fluctuation feature extraction and quantification module, an intelligent evaluation and deep learning analysis module and a dynamic adaptive monitoring regulation and control module, the pressure transmitter firstly continuously detects the fluid pressure in the earth crust fracture according to a preset initial detection threshold value, and recorded and collected pressure data serve as the basis of all subsequent analysis. According to the method, deep learning analysis and dynamic threshold adjustment are combined, transient pressure fluctuation and magma rising premonition are intelligently distinguished, and the risk of false alarm and missing alarm is reduced. By improving the sampling frequency and optimizing data analysis, a complete pressure change track is formed, the volcano monitoring precision and the anti-interference capability are improved, and efficient technical support is provided for geological safety early warning.

The invention provides a control method and device for cleaning equipment, the equipment, a medium and a program product, and can be applied to the technical field of liquid cooling servers. The method comprises the steps of determining a pressure difference value between a reference pressure value and a real-time pressure value of fluid at an outlet of a target pump in the cleaning equipment; a preset pressure control parameter is used for processing the pressure difference value based on a lag relation, a rotating speed adjusting signal is determined, and the lag relation indicates the lag degree between the rotating speed change moment of the target pump and the change moment of the collected fluid pressure value; the target pump is controlled to operate based on the rotating speed indicated by the rotating speed adjusting signal to adjust the output flow of the target pump, so that the adjusted pressure value is close to the reference pressure value; wherein the pressure control parameter is obtained by performing simulation calculation on a hysteresis relation based on an inertia time constant and pressure wave propagation delay time of the fluid at the outlet of the target pump.

The invention relates to the technical field of distributed control systems, and discloses a distributed valve body remote control system which comprises a valve body state acquisition module, a remote communication analysis module and the like. The valve body state acquisition module acquires parameters such as opening, fluid pressure and surface temperature of a multi-area valve body according to a monitoring period, and a high-frequency monitoring mode can be started; the remote communication analysis module evaluates communication delay; the distributed coordination module synchronizes parameters when communication is normal, and calculates a dynamic regulation factor through a formula to generate a regulation instruction; the instruction distribution module determines an instruction distribution sequence according to a priority weight formula, and is provided with delay and forced distribution strategies; and the abnormal response module gives an alarm and marks the position code of the valve body when the communication delay exceeds the limit or the weight is continuously too low. And the system also checks and complements the acquired data. The system improves the monitoring control precision and reliability, and is suitable for remote monitoring of multi-area valve bodies.

A system for controlling a wheel brake on an auxiliary axle of a vehicle includes an electro-pneumatic drive axle brake control valve that deliver fluid pressure from a fluid source to a drive axle wheel brake on a drive axle of the vehicle responsive to an electronic control signal. An auxiliary axle brake control valve delivers fluid pressure from the electro-pneumatic drive axle brake control valve to an auxiliary axle wheel brake on the auxiliary axle of the vehicle responsive to a fluid pressure control signal. A fluid control signal generating valve generates the fluid pressure control signal responsive to a command to apply a steer axle wheel brake on a steer axle of the vehicle.

The present application discloses a rigid pressure stabilizing device for an oil drilling pump, belonging to the field of oil drilling equipment. The key technical points of its technical solution include a housing, a separating ring, and a fixing column. Among them, the housing is provided with an inlet and outlet hole for fluid to enter and exit, which is communicated with the discharge pipe of the drilling pump; the separating ring divides the interior of the housing into a first space and a second space, and the two are communicated through a communication hole. A plurality of annular first fins are arranged in the first space, alternately arranged and provided with shunt holes, which helps to stabilize the fluid pressure; a plurality of annular second fins are arranged in the second space, also alternately arranged and provided with shunt holes. The inlet and outlet hole, the first space, the communication hole, and the second space form a circulation channel for fluid to circulate, achieving the effect of improving the working reliability of the drilling pump and effectively reducing the failure rate caused by pressure fluctuations.

The present disclosure relates to a method for evaluating a temporary plugging effect of fracturing in a low-permeability oil-gas reservoir based on monitoring pressure. The method comprises: calculating a wellbore friction resistance along a way from a wellhead to a target fracturing segment; calculating, based on a wellhead pressure monitored at the wellhead in real time, a wellbore pressure at the target fracturing segment; calculating a fluid pressure at a crack opening of each perforation cluster; calculating a perforation friction resistance coefficient of each perforation cluster; calculating a fracturing fluid instantaneous displacement of each perforation cluster; calculating, based on the fracturing fluid instantaneous displacement of each perforation cluster, a variation coefficient of a fracturing fluid displacement distribution after a fracturing construction is completed; and evaluating the temporary plugging effect of fracturing based on the variation coefficient.

Disclosed is a fracture plugging simulation experimental device and an experimental method thereof. The device comprises a simulated wellbore, a simulated formation, a simulated fracture, a plurality of pressure sensors and vales, a mixing barrel, a liquid injection port and a pressurization port, a liquid collection tank, a plugging fluid storage tank, a heating device, etc. The method comprises: loading the simulated formation with the simulated fracture in the simulated wellbore, closing the second valve and turning on the mixing device, injecting a lost circulation material into the mixing barrel, closing the liquid injection port and turning on the heating device and pressurizing, stopping pressurizing and opening the second valve to establish a plugging process, turning on the plunger pump to continue pressurizing, and collecting a fluid pressure change of the simulated fracture in the plugging process; and calculating a pressure-bearing capacity of plugged fracture.

The invention discloses a method for evaluating the crude oil utilization rate during shale oil in-situ heating modification exploitation, and is applied to the field of oil development. The method comprises the following steps: (1) constructing a three-dimensional grid model of shale oil reservoirs between two horizontal wells, and determining parameters such as initial temperature, initial fluid pressure, initial porosity, initial oil saturation, initial gas saturation, initial water saturation and initial dissolved gas volume of three-dimensional grid units of each reservoir; (2) determining the pressure of each reservoir three-dimensional grid unit when the fluid pressure is balanced according to the shale oil layer section bottom hole pressure and the reservoir displacement pressure gradient; (3) according to the characteristics of a temperature field, a pressure field and the like of the in-situ heating shale oil reservoir, obtaining three-dimensional grid unit temperature and instantaneous fluid pressure parameters of each reservoir, and determining porosity and fluid saturation at each time point; and (4) according to the instantaneous fluid pressure and the balanced fluid pressure of the three-dimensional grid unit of each reservoir, determining the oil, gas and water production quantity and the production rate of the grid unit of each reservoir in combination with the oil, gas and water saturation.

The invention discloses an electromagnetic valve vibration fatigue test device and a failure judgment method, and relates to the technical field of electromagnetic valve tests.The electromagnetic valve vibration fatigue test device comprises a test box, a conveying mechanism, a balance weight mechanism, a vibration table, an opening and closing detection mechanism and a clamping detection mechanism; the front end and the rear end of the top in the test box are fixedly connected with counterweight mechanisms, the bottom in the test box is fixedly connected with a vibration table, the right end in the test box is fixedly connected with an opening and closing detection mechanism, and the top of the vibration table is fixedly connected with a clamping detection mechanism and a conveying mechanism; the inlet and outlet pressure of the detected electromagnetic valve is detected through a sensor, failure judgment of the electromagnetic valve is achieved, then the pressure is adjusted through the combination mode of low-speed precise conveying of a piston cylinder and high-speed large-flow conveying of an external fluid conveying box, periodic fluid pressure fluctuation is applied while vibration is conducted, and the real load of the electromagnetic valve is simulated. And the superimposed effect of mechanical vibration and fluid impact is synchronously tested.

The invention discloses a fluid pressure resistance testing device for seamless steel pipe machining, and relates to the technical field of steel pipe pressure resistance testing. Comprising a test pressurization piece, two pipe end positioning pieces are installed on the test pressurization piece, and clamping driving pieces are installed on the two pipe end positioning pieces respectively; the two pipe end positioning pieces are respectively used for switching the clamping positions of the end parts of the seamless steel pipe; the four clamping driving pieces are each provided with a magnetic safety piece. The four magnetic safety pieces are used for being connected with the two pipe end positioning pieces in an inserted mode respectively. Movable pressure measuring pieces are mounted on the two pipe end positioning pieces; the structure can be used for quickly clamping the end of the steel pipe for positioning, stability during pressure test can be ensured, the structure is stable in positioning, and comprehensiveness of pressure resistance test of the end of the steel pipe is improved; the fluid pressure resistance testing device aims to solve the problems that an existing fluid pressure resistance testing device for seamless steel pipe machining is usually provided with a quick-release connector, the connector can surround and extrude the end of a pipe fitting, and it is inconvenient for an anti-explosion pipe to switch the clamping position of the steel pipe.

The utility model discloses a one-way valve with a pressure relief protection function, and particularly relates to the technical field of one-way valves, which comprises a valve body, a discharge pipe is arranged at one end of the valve body in a penetrating manner, an outer valve sleeve is arranged on one side of the valve body in a penetrating manner, a pressure relief mechanism is arranged in the outer valve sleeve, and the pressure relief mechanism comprises a pressure relief valve seat arranged in the outer valve sleeve. A guide groove is formed in the outer valve sleeve, a guide ring is slidably arranged in the guide groove, a pressure relief valve element is fixedly arranged in the guide ring, a pressure relief spring is fixedly arranged at the top of the pressure relief valve element, an adjusting disc is slidably arranged on the inner wall of the valve body, and a threaded rod is rotatably arranged on one side of the adjusting disc. When the fluid pressure abnormally rises, the pressure relief channel can be automatically opened, the one-way valve and a conveying system are effectively protected, the position of the pressure relief valve element can be conveniently and manually adjusted, pressure relief parameters are flexibly controlled, and the requirements of different working conditions are met.

The invention provides a shale oil well pressure recovery well test interpretation method and device and electronic equipment.The method comprises the steps that effective well shut-in pressure test data and well entering time of a pressure gauge are obtained, the effective well shut-in pressure test data are well bottom pressure data after well shut-in and after the pressure gauge is lowered to the target test depth away from a well opening, and the well entering time is obtained; the well entering time is the time required for lowering the pressure gauge to a target test depth from a well mouth after the well is closed; obtaining well shut-in starting time and a pressure gradient in a well entering process of the pressure gauge; according to the pressure gradient, fluid pressure data at the well shut-in starting time and the target test depth from the well mouth are calculated to serve as supplementary pressure data; according to the effective shut-in pressure test data, the well entering time and the supplementary pressure data, a complete pressure recovery well test curve is determined; and on the basis of the complete pressure recovery well test curve, pressure recovery well test interpretation is carried out. According to the method, the problem of data missing in the early stage of well shut-in testing can be solved, the integrity of a pressure recovery well testing curve is guaranteed, and the accuracy of pressure recovery well testing interpretation is improved.

A seal includes a seal body formed as a closed loop. The seal body having an upper surface and a lower surface. The seal body comprises an inner wall and an outer wall. The lower surface comprises an inner wing and an outer wing extending laterally from the outer surface to provide lateral sealing. The upper surface of the seal is configured to provide a sealing contact when the seal is urged into engagement via a fluid pressure.

A method for detecting leakage in a fluid system. Some embodiments of the method comprise: receiving a plurality of measured pressure values of a fluid pressure in the fluid system measured at different points in time; computing, from the received pressure values, a first pressure gradient at a first point in time; computing, from the received pressure values, a second pressure gradient at a second point in time, later than the first point in time, wherein the fluid pressure in the fluid system at the first point in time is higher than the fluid pressure in the fluid system at the second point in time; detecting presence of a leakage responsive to the magnitude of the second pressure gradient being smaller than the magnitude of the first pressure gradient.

A method performed by a computing device for controlling fluid pressure in a fluid distribution network (FDN) above a threshold pressure by communicating with a plurality of pressure control stations distributed throughout the FDN to independently control a fluid pressure at each of the plurality of pressure control stations is provided. The method comprises training a machine learning algorithm to establish one or more correspondences between a measured variation in fluid demand in the FDN for a first time period and measured environmental conditions for the first time period. The method comprises predicting a variation in fluid demand in the FDN for a second, later time period based on predicted environmental conditions for the second time period and the established one or more correspondences between the measured variation in fluid demand in the FDN for the first time period and the measured environmental conditions for the FDN for the first time period. The method comprises determining, based on the predicted variation in fluid demand for the second time period, a variation in fluid pressure to be applied at the plurality of pressure control stations for the second time period to satisfy a fluid pressure condition at one or more pre-determined points in the FDN downstream from the plurality of pressure control stations. The method comprises transmitting, to the plurality of pressure control stations, an indication of the determined variation in fluid pressure to be applied at the plurality of pressure-control stations for the second time period to satisfy the fluid pressure condition at the one or more pre-determined points in the FDN.

The invention is suitable for the technical field of flat gate valves, and particularly relates to a method for testing the sealing performance of a flat gate valve under a high-pressure-difference working condition. Wherein the pressure difference information comprises a plurality of pieces of opening difference information; obtaining analysis information based on the pressure difference information; wherein the analysis information comprises opening degree analysis information and service life prediction information; obtaining a test report based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve. According to the method for testing the sealing performance of the flat gate valve under the high-pressure-difference working condition, the situation that the contact pressure of the sealing surface is possibly smaller than the fluid pressure difference of the two sides of the gate plate in the high-pressure-difference working condition and in the environment where the flat gate valve needs to be frequently opened and closed, and consequently macroscopic leakage or microscopic leakage is caused can be improved; and high-speed jet flow generated when a medium passes through a sealing surface gap is easy to cause cavitation abrasion, so that the sealing performance of the gate valve is influenced.

A downhole tool assembly is configured for repeated and selective hydraulic activation and deactivation. A spring member biases the indexing control section 210 towards a first axial position while drilling fluid pressure in the tool body urges the indexing control section 210 towards other axial positions. Downhole tool activation and deactivation may repeatedly be controlled from the surface by cycling the drilling fluid pressure.

An airless fluid dispensing apparatus, a stem-less spray valve, and a pressure relief valve are disclosed. The stem-less spray valve comprises a generally cylindrical valve body; a fluid conduit, operable to allow a flow of the fluid from a pump, at least partially through the valve body, to a spray orifice; a movable plug disposed at least partially within the valve body; a seat, shaped to conform to a shape of the movable plug; a spring disposed within the valve body. The spring biases the movable plug against the seat to prevent the fluid from flowing through the fluid conduit to the spray orifice when a fluid pressure is below a spray pressure threshold. When the fluid pressure reaches or exceeds the spray pressure threshold, the spring compresses, at least partially retracting the movable plug away from the seat, and allowing the fluid to flow through the fluid conduit to the spray orifice.

A pressure relief valve 855 comprising a cap 805 with an opening therein, a plunger 810 configured to fill the opening in the cap 805 and a spring 815 configured to hold the plunger against the cap. T

The invention discloses a coal seam induced fracturing method. A hydraulic fracturing fluid comprises a basic aqueous phase system and induced functional particles dispersed in the basic aqueous phase system. The prepared hydraulic fracturing fluid is injected into a target stratum at the set displacement and pressure, and an initial main fracture is formed in a reservoir by means of the fluid pressure; in the process, the functional particles in the fracturing fluid enter the crack tip and the potential branch position along with the fluid and are uniformly distributed in a crack channel; along with migration of the fracturing fluid in the stratum, the inducible functional particles act under different triggering conditions, so that the fracture system is evolved into a multi-direction and multi-branch fracture network from a single main fracture, and the transformation volume and the reservoir permeability are increased. Expansion or reaction can be triggered in the fracture, so that stress concentration is generated locally, secondary fracture formation is induced, a complex fracture network is constructed, and reservoir permeability is improved.

The invention relates to the technical field of anti-blocking submerged pump equipment, in particular to an anti-blocking submerged pump which comprises a connecting assembly, a pump body motor, a liquid pump assembly, a liquid discharging pipe, a filtering assembly and a connecting shaft, the pump body motor is fixedly connected with one end of the connecting assembly, the liquid pump assembly is provided with a pump body flow channel, a liquid inlet and a liquid outlet, and the liquid discharging pipe is connected with the connecting shaft. An impeller is installed in the pump body flow channel, the liquid discharging pipe is fixed to the liquid outlet and provided with a liquid inlet end, a liquid discharging end and a back flushing end, the filtering assembly is installed in the liquid inlet and comprises a filtering part and a sliding part, and a sewage discharging groove penetrating through the filtering assembly is formed in the sliding part. Through the combined design of the filtering assembly and the liquid outlet, automatic cleaning is achieved, the use energy consumption and the use cost of the submerged pump are reduced, energy consumption increase caused by blockage of the submerged pump is avoided, meanwhile, additional power equipment is not needed in the back flushing process, opening and closing of a sewage discharging groove of the filtering assembly can be completed only through fluid pressure, and the cost is reduced. And the maintenance energy consumption of the submerged pump is reduced.

A method for confirming delivery of bulk material from a bed of a dump truck based on hydraulic pressure. The dump truck has a driving device moving the bed between a rest position and a delivery position. The method generally having: using a hydraulic pressure sensor, measuring a plurality of hydraulic pressure values indicative of pressure of a hydraulic fluid of the driving device as the bed is moved; and using a controller communicatively coupled to the hydraulic pressure sensor: monitoring a slope at which at least some of the plurality of hydraulic pressure values vary over a given period of time; and generating a delivery confirmation indicative that a delivery of the bulk material has occurred based on a comparison between the monitored slope and a delivery slope threshold.

The invention discloses a huff-puff mining experimental device and method based on the pressure flooding crack propagation effect, and relates to the technical field of oil and gas exploiting.The huff-puff mining experimental device comprises an experimental rock plate and a temperature control box, an injection port of the experimental rock plate is connected with an intermediate container, a liquid outlet is provided with a liquid drainage valve, and the intermediate container is connected with a displacement pump; monitoring the fluid pressure in the experimental rock plate through a pressure detection device; the crack pressure in the experimental rock plate is controlled through a pressure control device; observing the fluid percolation condition in the internal crack of the reservoir rock sample by using an observation device; sequentially injecting saturated formation water and formation crude oil into the experimental rock plate through a displacement pump, then injecting displacement fluid, and monitoring the pressure and flow of the injected fluid and the response condition of the crack; soaking the well and continuously monitoring the pressure change; and after the soaking is finished, opening the drain valve, recording the oil gas quantity produced in the flowback process, and calculating the recovery ratio. According to the invention, fluid seepage and soaking diffusion flowback laws under dynamic expansion of the pressure-driven fracture can be studied.