5results about How to "Reliable evaluation" patented technology

This invention relates to a sealing performance testing unit, a multi-stage sealing performance testing system, and a method for sealing plugs. The testing unit includes: a loading assembly comprising an inner cylinder and an outer cylinder coaxially arranged and open at both ends, with a gap between them to define a confining pressure annulus. The inner cylinder is used to accommodate the sealing plug to be tested. An end sealing assembly is sealingly connected to both ends of the loading assembly to close the two end ports of the inner cylinder and the confining pressure annulus. A fluid channel system is disposed on the end sealing assembly, including a main fluid channel communicating with the interior of the inner cylinder and a confining pressure channel communicating with the confining pressure annulus. The confining pressure channel is used to connect to an external pressure source to apply radial confining pressure to the inner cylinder. The main fluid channel is detachably connected to the main fluid channel of another adjacent testing unit to form a multi-stage series testing loop. This testing unit can quantitatively analyze the pressure transmission mechanism and synergistic effect between multi-stage sealing plugs.

This invention relates to the field of hydrogeological exploration technology and discloses a method for accurately predicting aquifer inflow by integrating conventional and electromagnetic flow logging. The method includes the following steps: Step 1: Well logging data acquisition. Electromagnetic flow logging and conventional logging are performed simultaneously in the target exploration borehole to obtain static and dynamic flow response amplitude curves, apparent resistivity curves, natural gamma curves, and sonic transit time data. This method for accurately predicting aquifer inflow by integrating conventional and electromagnetic flow logging data constructs a key parameter system covering four dimensions: "water storage space - recharge power - water storage capacity - permeability resistance." It also utilizes the powerful nonlinear fitting capability of a generalized regression neural network (GRNN) to establish a prediction model, effectively overcoming the shortcomings of traditional theoretical formulas in adapting to complex geological conditions.

This invention belongs to the field of tight oil and gas geophysical exploration and development technology, and provides a method and apparatus for identifying tight sandstone gas reservoirs based on gas-bearing characteristics through well logging. The method includes collecting well logging data of two porosities from tight sandstone gas reservoirs; when the two porosity well logging data overlap in mudstone sections, using a dimensionless curve calculated based on the envelope area between the two porosity well logging data, the gas-bearing characteristics of each reservoir section of the tight sandstone gas reservoir are identified. This invention is used for rapid evaluation of gas-bearing reservoir properties in well logging evaluation of gas reservoirs, avoiding the problems of weak gas logging response information in tight gas reservoirs, reduced curve identification ability due to mud invasion, and difficulty in determining the rock skeleton under complex lithological conditions, thus achieving the goal of rapidly identifying gas reservoir properties using well logging data.

This invention relates to the field of process control technology in metal material forming, and discloses an optimized control method for a wheel hub liquid forging process. A punch displacement sensor and a liquid forging pressure sensor are set up to synchronously collect and calibrate displacement and pressure signals, and perform zero-point correction to obtain a displacement and pressure sampling sequence. The displacement change rate, pressure change rate, and effective compensation displacement increment are calculated, and the filling end and compensation evaluation termination intervals are obtained according to statistical thresholds. The effective compensation displacement is accumulated within the evaluation interval, and the pressure area is obtained by integrating the pressure to construct a smoothness index. The start time of secondary pressurization, platform pressure, and duration are discretized into a candidate set to generate a target pressure trajectory that meets the pressure change rate constraint and calculates the smoothness. Optimal parameters are screened and corrected, and the pressure command sequence is output and solidified for distribution to the hydraulic system, achieving quantifiable optimization and stable execution of parameters.

The invention discloses a method for testing the sunlight blocking rate of a textile, belongs to the technical field of optical performance testing of textile materials, and aims to solve the core problems of poor reproducibility and comparability of a test result caused by splitting of a test wave band, serious distortion of the test result of a fluorescent textile and lack of calculation specifications in the prior art. The method comprises the following steps: firstly, carrying out fluorescence attribute discrimination on a to-be-detected textile, and classifying and acquiring effective spectral transmittance of full wave bands of 280-2500 nm based on a discrimination result; aiming at the textile containing the fluorescent substance, the interference of fluorescence emission light on the test is effectively eliminated by adopting a sub-band isolation measurement method; standard solar spectrum irradiance data subjected to standardization processing is adopted as a weighting parameter, and a sunlight blocking rate result is output after weighted average calculation and standardization modification. The method realizes integrated scientific evaluation of the total solar spectrum barrier property of the textile, is accurate and reliable in test result, and can be widely applied to standardized detection of the sunlight barrier property of various textiles.