30results about How to "The test method is practical" patented technology

The invention discloses a method applied to evaluation of flow conductivity of shale-gas-combined sand fracturing fracture. The method comprises the following steps: a, simulating a sand bar transporting process in shale-gas-slickwater-combined sand fracturing fracture by means of an experiment device for simulating flowing of proppants in a visual fracture net to obtain sand bar transporting video of the combined sand fracturing fracture under different experiment conditions; b, obtaining a distribution curve of the proppants with different particle diameters by virtue of a gray processing method and a point-by-point scanning method and obtaining distribution shape function of the proppants with different particle diameters by virtue of a linear regression method; c, building the sand bar distribution shape function of an API flow guide chamber by utilizing geometric similarity principle according to the size of the API flow guide chamber, paving shapes of the corresponding proppants and implementing evaluation of flow conductivity of shale-gas-combined sand fracturing fracture. The method is capable of simply and accurately implementing quantitative evaluation of the flow conductivity of shale-gas-combined sand fracturing fracture; experiment support is provided for optimizing the combined sand fracturing design and improving the flow conductivity of the shale fracturing fracture.

The invention discloses an integrated device for mixing and displacing two fluids and an application method thereof. The device comprises an auxiliary fluid delivery unit, a working fluid delivery unit and a mixing tank. The auxiliary fluid delivery unit and the working fluid delivery unit respectively pump the auxiliary fluid and the working fluid into the mixing tank for mixing, and then drive the obtained mixed solution to the subsequent experimental testing device. The mixing tank is a sealed cylindrical tank, and an isolation piston that can move up and down is arranged in the mixing tank, and the piston divides the cavity in the tank into an upper cavity and a lower cavity that are independently isolated; an agitator is set in the lower cavity, The bottom of the lower chamber is provided with super-auxiliary fluid inlet and working fluid inlet, and the top of the upper chamber is provided with clean water inlet and outlet. The working fluid delivery unit includes a working fluid tank, a clean water tank and a plunger pump. The device of the invention has the integrated functions of mixed liquid generation and displacement, which not only saves the experiment cost, but also improves the experiment efficiency.

The invention discloses a milling chatter test piece and method. The milling chatter test piece is provided with a datum plane and a slope, and the datum plane and the slope are covered with T-shaped test areas. The T-shaped test areas are internally provided with linear test area bodies and rounded-corner test area bodies. According to the milling chatter test method, a tool mills the T-shaped test areas covering the slope at first, the milling depth obtained when chatter is generated is measured, the milling depth of the tool is adjusted, the T-shaped test areas in the datum plane are milled, the datum plane is mainly used for measuring the milling chatter condition of the milling depth at which no chatter is generated when the slope is milled in the linear test area bodies and the rounded-corner test area bodies of the datum plane, and accordingly stable parameters are obtained; and in order to avoid chatter during machining, the milling depth needs to be kept below the former milling depth value, the test part can measure different rounded corners, the formation angles of the rounded corners and the milling chatter condition during height milling, the testing is simple, convenient to implement and reliable, and complex measurement and analysis facilities are not required.

The invention relates to a testing device and method for simulating the backflow of a propping agent. The testing device mainly comprises a liquid storage pot, a chamber pump, a pipeline heating sleeve, a flow meter, a diversion chamber, displacement sensors, an oil pressing machine, a sand sample collector, a waste liquid pot, a data acquiring and controlling panel, and a computer. The testing method comprises the following steps: propping agent is paved between two rock plates and is loaded in the diversion chamber, the chamber pump is opened to be driven by small discharge, the displacement sensors are arranged at two sides of the oil pressing machine, and are loaded to design pressure, the computer, the pipeline heating sleeve and an electric heating rod are started to adjust the discharge of the chamber pump, all data are transmitted to the computer through the data acquiring and controlling panel, the discharge is gradually increased to obtain the backflow critical flow velocityof the propping agent under certain closing pressure, and the closing pressure is gradually increased to obtain the backflow critical flow velocity of the propping agent under the condition of different closing pressure. The invention can simulate the real condition of the backflow of the propping agent in pressing cracks, and meets the testing requirement of the backflow of the propping agent under the condition of different environments.

The invention relates to a polyethylene fiber monofilament accelerated ageing test method for fishing. It includes the sampling, loading and mechanical test. The feature is that: it intercepts the sample at 20m distance from one end of filament or the joint, coiling the monofilament sample on aluminum sheet that would be fixed on the sample frame of ultraviolet ageing test box; taking manual accelerated ageing test according to the cycling test process of irradiating for 8h under black standard temperature of 60deg.C and condensing for 4h under black standard temperature of 50 deg.C; after balancing for 24h in standard lab, taking mechanical test. The invention is also suitable for other compounding fiber fishing netting twine.

The invention discloses a general test platform and a general test method for an optical communication equipment function module. The general test platform comprises a test backboard and a human-computer interface, wherein the human-computer interface is electrically connected with the test backboard, the test backboard comprises an IIC communication unit, a power supply unit, a monitoring unit, a storing unit, a signal control unit and a processing unit, the power supply unit, the monitoring unit, the storing unit, the signal control unit and the processing unit are electrically connected with the IIC communication unit respectively, and the power supply unit respectively provides the standard voltage for the IIC communication unit and an expansion board card in an expansion slot. A work state of the expansion board card is monitored by the monitoring unit in real time, and the voltage and the current of the expansion board card are adjusted. The general test platform has advantages of simple structure, high integration, high expansibility, saved development cost and maintenance cost, practical test method and convenient and fast performance.

The invention relates to a self-support fracture testing and analyzing device and method for oil-gas field development. The device is mainly composed of a fluid storage tank, an advection pump, a pretreated working fluid tank, a reverse mold fluid tank, a flow conduction chamber, a displacement sensor, a hydraulic press, a fracture maker, a back-pressure controller, a collected fluid bottle, a data acquisition and control board and a computer. The method comprises the following steps: naturally breaking a rock core into two rock plates; putting the rock plates into the inner cavity of the flow conduction chamber to form a self-support in-fracture fluid flow region; applying an initial pressure so that the in-fracture fluid flow region is fully filled with the testing fluid; pretreating the in-fracture fluid flow region; starting the computer, inputting experimental parameters, and injecting the testing fluid; acquiring self-support fracture flow conductivity; treating the in-fracture fluid flow region again; and driving the reverse mold fluid into the flow conduction chamber to form a reverse mold casting. The invention can simulate the actual situation of the self-support fracture to acquire accurate flow conductivity test data, and can also acquire the flow form of the self-support in-fracture fluid.

The invention discloses an experimental device simulating the CO2 acid fracturing and acid etching crack process and a testing method. A CO2 conveying unit, an acid liquid conveying unit, a liquid mixing tank of supercritical CO2 and acid liquid, and a rock plate holder are included, and a rock plate is installed in the rock plate holder; supercritical CO2 and acid liquid are pumped into the liquid mixing tank by the CO2 conveying unit and the acid liquid conveying unit correspondingly to be mixed, obtained mixed fluid is injected into the rock plate holder, and a liquid outlet of the rock plate holder is provided with a back pressure valve; and the liquid mixing tank is a cylindrical tank body which is arranged in a sealed manner; and the bottom of the tank body is provided with a supercritical CO2 inlet and a liquid inlet and outlet. The liquid outlet of the rock plate holder is sequentially connected with the back pressure valve, a cooling water jacket, a CO2 separation tank and a waste liquid tank, and the CO2 separation tank is further connected with an acid liquid neutralization tank. The experimental device and method provide a special device and testing method for accurately simulating the real acid etching form in CO2 acid fracturing.

The invention relates to a device for measuring the air leakage rate of an air preheater of a power plant boiler under medium and low loads, which includes a first flue gas oxygen content sensor installed at the inlet of the air preheater, a second flue gas sensor installed at the outlet of the air preheater Oxygen content sensor, fly ash carbon content sensor installed at the air preheater outlet, data acquisition unit and computer. The present invention also includes the method of using the above-mentioned device to carry out the air preheater air leakage test at medium and low loads, and converting to obtain the air preheater air leakage rate under the rated load or BMCR working conditions. The method of the present invention is simple and reduces the on-site coordination of air preheater air leakage The workload and experiment cost and the result is accurate.

A method for testing strength of single thread for twisted fishing net includes shearing said net to obtain single thread with cross thread- foot, fixing said thread in champing tool of strength tester, adjusting movable speed of clamping tool on strength tester according to value as thread average breaking time of 20s minus or plus 3s when tensile test is carried out on strength tester, using maximum load value of break as strength of single thread on twisted fishing net.

The invention discloses a testing circuit and method for a converter valve module, and the converter valve module is a power module of a half-bridge structure, and comprises two switchable semiconductors (T1, T2), an energy storage capacitor (C1), and a bypass switch (K). A controllable rechargeable power supply is employed for the live-line switching-on bypass test of the bypass switch (K) of the converter valve module. Through the control of the on / off time of a semiconductor switch unit of the controllable rechargeable power supply and a switchable power semiconductor of the converter valve module, the current size and direction can be controlled during the switching-on of the bypass switch. The testing method can achieve the equivalent simulation of the switching-on working condition of the bypass switch of the converter valve module in the actual operation, can be used for the detection of the bypass switches of designed, produced, manufactured and assembled converter valve modules and the integrity of triggering circuits.

The invention discloses a method for quickly testing weathering resistance of polypropylene fiber for a net cage or fishing gear, and relates to the test of the weathering resistance of the polypropylene fiber. Aiming at shortening the test time, the method comprises sampling, exposing condition, weathering resistance test, conditioning balance, test box, fiber crystallinity and test of stretching property, and is characterized in that: a sample is selected 40m away from the tail end of fiber; a test program is made under exposing conditions of 4-hour irradiation at a black standard temperature of 63 DEG C and 2-hour condensation at a black standard temperature of 51 DEG C; the sample undergoes conditioning balance at a temperature of between 15 and 21 DEG C and a humidity of between 50 and 70 percent; fluorescent UV lights of the test box are arranged in two lines, and each line includes 4 lights; and the sample undergoes the DSC test by a differential scanning calorimeter to measurethe melting heat contents of the sample before and after the test of the weathering resistance, and the crystallinity of the sample is worked out; the sample is stretched at a stretching speed of 360mm / min until broken, and the line density and the stretching strength of the sample are also measured. The method is used for quickly testing the weathering resistance of the polypropylene fiber for fishing.

The present invention relates to a method for detecting whether warm mix asphalt contains an oil-soluble amine surfactant warm mix agent. The method comprises: (1) weighing a sample to be detected, adding a solvent, and heating until the solvent presents a micro-boiling state and the color is changed into pale yellow; (2) pouring out the supernatant obtained in the step (1), adding a detection reagent in a dropwise manner, and observing the color change of the supernatant; (3) pouring out the supernatant obtained in the step (1), heating the supernatant, adding a detection reagent in a dropwise manner, and observing the color change of the supernatant; and (4) according to the step (2) and the step (3), determining whether the sample to be detected contains the oil-soluble amine surfactant warm mix agent. According to the present invention, the chromogenic reaction detection method has characteristics of not high requirement on test instrument, equipment and testing personnel, low detection cost, high sensitivity, and high practical value.