35 results about "Mouth pressure" patented technology

The invention discloses a program and method for controlling the pressure of nitrogen injection production increase coal bed gas. The method comprises the steps: enabling the response of a coal bed gas storage layer to the nitrogen injection pressure and rate of a nitrogen injection well and the changes of well mouth pressure, gas output and nitrogen volume percentage composition of a production well to be fed back to the nitrogen injection well, and adjusting the nitrogen injection pressure and rate; holding the pressure of the coal bed gas storage layer in necessity, and even carrying out conversion and employing a low-pressure oscillation pressurization mode; converting the coal bed gas storage layer in necessity and employing a high-pressure oscillation pressurization mode. Only if the coal bed has enough gas, are the program and method suitable for any coal bed. The method provided by the invention guarantees that the injected nitrogen enters into the coal bed, passes through all coal bed between the nitrogen injection well and the production well, enables the nitrogen to enter into miniature gaps of the coal bed, prompts adsorbed-state coal bed gas to be desorbed, drives the desorbed free-state coal bed gas to arrive at the production well, and achieves the purpose of coal bed gas yield increase.

The invention provides a remote well natural gas recovery device which mainly comprises a water jacket heater, a gas-liquid separator, a filter, a dehydration device, a reciprocating compressor, a gas charging pillar, a gas generating set and the like, and is characterized in that gas generated from a remote well is heated by a heating furnace, the heated gas enters the gas-liquid separator and the filter for separation and filtering to remove a liquid phase and a solid phase via separation and filtration, the filtered product is dehydrated by a molecular sieve, the dehydrated product enters the reciprocating compressor, the compressed product is pumped into a CNG trailer after being measured by the gas charging pillar to serve as CNG commercial gas for sale; when the CNG trailer containing the recovered gas is driven to a gas gathering station of a gas field, and the recovered gas is pumped into a pipe network again, charged gas enters a by-pass of the dehydration device directly; when the pressure in a well mouth is equal to or higher than 20 MPa, the charged gas enters a by-pass of the compressor directly; fuel gas of the gas generating set and the water jacket heater is supplied through a rear process pipeline of the dehydration device; and the whole set of the remote well natural gas recovery device is mounted on two semi-trailers, and fixedly erected on a well field via a hydraulic jack. The remote well natural gas recovery device is suitable for recovery of scattered natural gas in high-yield or intermittent-production remote wells of different well mouth pressures; the moving, transportation and mounting are convenient and fast; the adaptive capacity is high; and the recovery cost is low.

The invention relates to a dual-purpose multi-channel hydraulic proportional valve which comprises a pump connecting module. The second main oil channel of the pump connecting module is communicated with the oil inlet of the pump connecting module, a hole in the valve rod of a three-way overflow valve and an oil channel in the valve rod in sequence, one channel is connected to a first throttling hole and a valve rod spring cavity, and the other channel is connected to the left end of the valve rod of the three-way overflow valve. A first loading pressure feedback oil way channel is connected into an LS oil inlet of the pump connecting module, a small hole, a second throttling hole, an oil hole and the valve rod spring cavity in sequence through pressure oil fed back by an execution module, and the second throttling hole is communicated with the oil channel between the small hole and a third throttling valve and the oil channel between the first throttling hole and the valve rod spring cavity. According to a control pressure oil channel, pump outlet pressure oil passes through a small oil mouth and a P oil mouth pressure collecting point from the oil inlet of the pump connecting module to enter a pressure reducing valve, and the other end of the pressure reducing valve is connected with the execution module through the oil hole. The dual-purpose multi-channel hydraulic proportional valve is suitable for variable pumps and metering pumps, and only supplies necessary flow for maintaining system working under the working pressure needed by loads.

The invention discloses a method for predicating the combustion intensity of cigarettes based on detection of pressure drop. The method comprises the following steps: determining mouth-by-mouth pressure drop in a smoking process of a cigarette sample by utilizing a pressure drop detection device; determining combustion surface temperature under a corresponding smoking opening sequence of the cigarette sample by utilizing an thermal infrared imager and extracting all temperature data; taking the mouth-by-mouth pressure drop in the smoking process of the cigarette sample as an independent variable x and the combustion intensity y as a dependent variable to obtain a regression equation of a prediction model of the combustion intensity of the cigarettes; after determining the mouth-by-mouth pressure drop in the smoking process of the cigarette sample, substituting into the prediction model, so as to obtain the predicated combustion intensity of the cigarettes. According to the method disclosed by the invention, an experiment process for determining cigarette combustion property parameters is simplified and a basic detection method of the combustion intensity is supplemented; unstable factors in the determination of combustion temperature are reduced, and a data processing quantity in a traditional combustion temperature detection method is simplified. Furthermore, basic data is provided for guiding cigarette material researches, cigarette combustion and smoking mechanism analysis and cigarette material designing; the method has very strong practicability and wide applicability.

The invention discloses an oil well gas injection method. The oil well gas injection method comprises the steps that (1) the stratum pressure value of an oil well is calculated; (2) according to the obtained stratum pressure value, the well mouth pressure value generated by the oil well when only gas is injected into the oil well is calculated; and (3) when the output pressure value of gas injection equipment cannot meet the requirement of the well mouth pressure value, gas and water are injected into the oil well in a mixed mode. Through the oil well gas injection method, the well mouth gas injection pressure is effectively lowered, the gas-water mixing injection ratio adopted by a gas injection well under the condition of existing gas injection equipment is accurately predicted, technological support is provided for the gas injection technology, important guarantee is provided for development of the oil field gas injection three-time oil extraction technology, and application and promotion, under the condition of the existing gas injection equipment, of the technology that the nitrogen gas is injected to improve the recovery ratio are achieved.

The invention discloses an oil field water injection simulation experiment platform and mainly aims to provide a water injection simulation experiment device. The oil field water injection simulationexperiment platform is characterized in that the oil field water injection simulation experiment platform comprises a pipe network system, a simulated well system, a supporting frame structure, a baseplate mechanism and a work station; the pipe network comprises a spiral pipeline, a flow direction measuring device and a multi-way valve; the simulated well system comprises a plurality of simulatedwell units and is used for simulating the well mouth pressure in actual water injection; the supporting frame structure comprises two parts of a hydraulic vertical column unit and a frame unit, the base plate mechanism is divided into an upper layer and a lower layer and comprises a lower base plate and an upper base plate, and a hydraulic travelling mechanism is mounted on the lower base plate and can drive a whole system to move in the front-back direction and the left-right direction; and the work station comprises a water tank, a waster pump, a hydraulic oil tank and a valve box. According to the water injection simulation experiment device, the linear loss in well mouth pressure and actual oil field water injection can be simulated, the length of a spiral pipe and the number of wellmouths can be flexibly combined, the diversified simulation conditions can be met, an oil field water injection system is simulated, a water injecting pump is adjusted to reach the optimum displacement, and energy and water resources are saved.

The invention discloses a method for predicting the air flow of a cigarette combustion cone point based on detection pressure drop. The mouth-by-mouth pressure drop during cigarette sample suction ismeasured through a pressure drop detecting device; the air flow of the combustion cone point during cigarette sample suction is measured through a flow detecting device; a regression equation of a prediction model is obtained with the pressure drop as the independent variable x and the cigarette combustion cone point frontal air flow y; the mouth-by-mouth pressure drop during cigarette suction ismeasured and substituted into the prediction model so as to obtain the air flow of the cigarette combustion cone point. By means of the method, the measuring experimental process of the air flow of the cigarette combustion cone point is simplified; a detecting method of the air flow of the combustion cone point is supplemented, and by means of the method, unstable factors during combustion cone flow measuring can be reduced; the data processing process of a traditional combustion cone flow measuring method is simplified. The basic data and theoretical basis are provided for guiding the analysis of a cigarette combustion and suction mechanism and the design of a cigarette material, and the method has quite high practicability and wide applicability.

The invention relates to a testing method for the sand discharging capacity of a lifting pump. The lifting pump is located in a testing well, and is used for extracting liquid in the well; and the testing well is connected with a liquid supplying device which is provided with a liquid supplying pump. The method includes the following steps that firstly, liquid with a specific sand content and in aspecific volume is prepared in the liquid supplying device; secondly, the liquid supplying pump is started, so that the liquid with the specific sand content is injected into the testing well from the liquid supplying device; thirdly, the lifting pump is started, so that the liquid in the testing well is extracted to the liquid supplying device to form a cycle loop; fourthly, the liquid supplyingpump and the lifting pump are adjusted, so that the flow speed of the liquid in the cycle loop reaches a plurality of preset values, and a plurality of well mouth pressure values of the testing wellare obtained due to measurement; and fifthly, liquid with a sand content different from the previous specific sand content and in a specific volume is prepared in the liquid supplying device, the steps from the second step to the fourth step are repeatedly executed, and well mouth pressure values corresponding to different liquid flow speeds and different sand containing rates are obtained due tomeasurement.

The invention relates to a gas field transmission device based on a cluster well, in particular to a medium-pressure gas collection technique based on the cluster well, comprising gas wells, gas collecting branches, gas collecting main pipes, and a gas collection station in the cluster well set, wherein each gas well is provided with a well throttling machine. The medium-pressure gas collection technique is characterized in that: each gas well is used for reducing the well mouth pressure to the medium pressure through the well throttling machine, and uniformly transmits the natural gas generated by the gas wells of the cluster well set through a well mouth device and the gas collection branches to the next gathered well set after counting; the peripheral cluster well sets are gathered to be sent to the gas collection station through the gas collection main pipes; methanol injecting pipelines are arranged along the gas collection branches in the same slot to inject methanol to the cluster well sets through methanol injecting devices; and the methanol injecting devices are synchronously used to inject the methanol to the well set and the peripheral well sets. Under the condition of saving cost and simplifying technique, the natural gas in the well can be safely transported to a center processing factory to manage by fully using formation pressure without a heating furnace on the well mouth or the gas collection station, and a compressor at the gas collection station.

An oilfield water injection simulation experiment platform. The main purpose is to provide a set of simulated water injection experimental device. It is characterized in that: it includes a pipe network system, a simulated well system, a supporting frame structure, a chassis mechanism and a workstation; the pipe network system includes a spiral pipeline, a flow direction measuring device and a multi-way valve, and the simulated well system includes several simulated well units for simulating The wellhead pressure during actual water injection; the supporting frame structure includes two parts, the hydraulic column unit and the frame unit. The chassis mechanism is divided into upper and lower layers. The lower chassis is equipped with a hydraulic walking mechanism, which can drive the entire system to move forward and backward, left and right, and the upper chassis; Workstation Including water tank, water pump, hydraulic oil tank, hydraulic pump and valve box. This device can simulate the wellhead pressure and the loss along the way during water injection in the actual oilfield, and can flexibly combine the length of the spiral pipe and the number of wellheads, and can meet various simulation conditions, realize the simulation of the oilfield water injection system, and adjust the injection pump to achieve the optimal displacement. , save energy and water resources.

The invention discloses a method for predicating a combustion speed of cigarettes based on detection of pressure drop and flow field distribution. The method comprises the following steps: determiningmouth-by-mouth pressure drop in a smoking process of a cigarette sample by utilizing a pressure drop detection device; determining air flow of a combustion cone end by utilizing a flow detection device; determining the combustion speed under a corresponding smoking opening sequence by utilizing a combustion speed detection device; taking mouth-by-mouth pressure drop changes and the air flow as independent variables x1 and x2 respectively and the combustion speed y as a dependent variable, so as to obtain a regression equation of a prediction model of the combustion speed of the cigarettes; after determining the mouth-by-mouth pressure drop changes and the air flow of the combustion cone end in the smoking process of other cigarettes, substituting into the prediction model, so as to obtainthe combustion speed of the cigarettes. According to the method disclosed by the invention, an experiment process for determining cigarette combustion property parameters is simplified and a basic detection method of the combustion speed is supplemented; unstable factors in the determination are determined and data processing in a traditional method is simplified. Furthermore, basic data is provided for guiding cigarette material researches, cigarette combustion and smoking mechanism analysis and cigarette material designing.

Lead-screw nut vice transmission control device and the method and the processing method of nut components, the torque sensor in hydraulic control device of control device changes the torque transmitted by lead-screw into signals and transmits the signals to controller, the controller sends the oil duct reversing control signals on the three-position four-way magnetic reversing solenoid valve, the controller controls the output mouth pressure of pressure control valve which is transmitted on the side surface contacted with nut and lead-screw through two pipelines, the screw thread two sides of nut is opened with two spiral oil-storing grooves which are sealed and formed by two end covers of nut two ends and the surface contacted with nut and lead-screw; the control method is: the controller controls the output mouth pressure of pressure control valve to make it is less than or equal with 8TN / ((phi12-phi22)L), the processing method is: first assembling the nut and two end covers into one unit, processing screw thread on the inner hole surface of nut and two end covers, then processing two spiral oil-storing grooves on the screw thread two sides of nut, last assembling the nut and two end covers into one unit.

The invention provides a remote well natural gas recovery device which mainly comprises a water jacket heater, a gas-liquid separator, a filter, a dehydration device, a reciprocating compressor, a gas charging pillar, a gas generating set and the like, and is characterized in that gas generated from a remote well is heated by a heating furnace, the heated gas enters the gas-liquid separator and the filter for separation and filtering to remove a liquid phase and a solid phase via separation and filtration, the filtered product is dehydrated by a molecular sieve, the dehydrated product enters the reciprocating compressor, the compressed product is pumped into a CNG trailer after being measured by the gas charging pillar to serve as CNG commercial gas for sale; when the CNG trailer containing the recovered gas is driven to a gas gathering station of a gas field, and the recovered gas is pumped into a pipe network again, charged gas enters a by-pass of the dehydration device directly; when the pressure in a well mouth is equal to or higher than 20 MPa, the charged gas enters a by-pass of the compressor directly; fuel gas of the gas generating set and the water jacket heater is supplied through a rear process pipeline of the dehydration device; and the whole set of the remote well natural gas recovery device is mounted on two semi-trailers, and fixedly erected on a well field via a hydraulic jack. The remote well natural gas recovery device is suitable for recovery of scattered natural gas in high-yield or intermittent-production remote wells of different well mouth pressures; the moving, transportation and mounting are convenient and fast; the adaptive capacity is high; and the recovery cost is low.

The invention provides an exercise trumpet capable of adjusting length of the trumpet body. A trumpet mouth pressure reducing practicer convenient for beginner practice and extending the length of thetrumpet body is arranged between the trumpet mouth and the intake pipe, while extending of the length of the trumpet body affects the accuracy of musical sound pitch. The solution is to cut off halfof the extending length of the intake pipe and the exhaust pipe so as to offset the influence of the extending length of the trumpet body and ensure the original length and the pitch of the trumpet body and facilitate the beginner to practice. When the trumpet is normally used, the practicer is removed, the two end parts of the main tuning pipe are extended by the length equal to the length cut off from the intake pipe and the exhaust pipe, or the upper pipe and the lower pipe sleeve between the main tuning pipe and the intake pipe and between the main tuning pipe and the exhaust pipe, and thelength of the upper pipe and the lower pipe is equal to the size cut off from the intake pipe and the exhaust pipe and are connected by connecting rods so as to ensure the original length of the trumpet body of the trumpet. According to the trumpet, the accuracy of the musical sound pitch can be ensured, and the trumpet is suitable for beginner practice and normal use and is simple in structure and convenient to disassemble and assemble.

The cordless handheld device detects and analyzes orofacial activity based on the associated compression or deflection of the teat and oral pressure. The device is capable of receiving and analyzing data that can be used to train the baby to eat.

The invention relates to a combined well mouth testing device for a polymer injection well. A high-precision pressure monitor and a continuous liquid level monitor are connected with a three-way valve in a combination mode, and one combined well mouth testing device is installed on a corresponding pipeline of each polymer injection layer. The invention further relates to a testing method, and the testing method includes the following sequential steps that one combined well mouth testing device is installed on the corresponding pipeline of each polymer injection layer; well mouth pressures and liquid levels of all the polymer injection layers are tested at the same time; bottom hole pressure of the corresponding polymer injection layer is calculated according to testing values of the well mouth pressure and the liquid level of each polymer injection layer; a corresponding pressure monitoring well testing model is selected according to the bottom hole pressure of each polymer injection layer; the bottom hole pressures of all the polymer injection layers and the corresponding pressure monitoring well testing models are fitted respectively to obtain well testing interpretation parameters, and the underground viscosity distribution condition of a polymer solution of the corresponding polymer injection layer is solved inversely. The technical scheme solves the problem that pressure testing data is lost due to single well mouth pressure testing.

The testing desk for measuring the force of the tongs mouth of motorcycle brake comprises the computer and the main body of the testing desk. The main body comprises the mounting rack comprises, the clamping fixture for fixing the handle body, an othering fixture for fixing the tongs mouth on the tested piece and the pump assembly, the actuating unit for driving the handle on the handle body and the push rod pressing on the tongs mouth. The displacement sensor and the handle pressure sensor are setup on the actuating unit. The tongs mouth pressure sensor is setup on the push rod. The signals of the sensors and are input to the computer. The actuating unit simulates braking so as to drive the handle on the tested piece, making the division piston of the pump of the tested piece act. Meanwhile, the computer runs the testing program, which sends the signals detected by sensors to the computer for further processing.