41results about How to "Measurement method science" patented technology

The invention belongs to the technical field of irregular oil gas development and production increase, and particularly relates to an evaluating method of oil and gas reservoir seepage by supercritical carbon dioxide fracturing fluid and a method thereof; a carbon dioxide pressurizing and filling system provides carbon dioxide air source and pressure, and is connected with a supercritical carbon dioxide fracturing fluid phase balance reaction system; the supercritical carbon dioxide fracturing fluid phase balance reaction system is linked with a temperature control system in parallel; a core displacement and permeability measuring system is respectively connected with the supercritical carbon dioxide fracturing fluid phase balance reaction system and a return pressure system, so that the fracturing fluid is effected on the core; the return pressure system provides necessary return pressure for experiment, so as to simulate the real formation condition. The device can adjust the experiment temperature and pressure according to different experiments, and exactly determine the damage rate of the supercritical carbon dioxide fracturing fluid core, and study influences of supercritical carbon dioxide fracturing fluid on the core damage rate under different experimental conditions.

The invention belongs to the technical field of unconventional oil and gas exploitation, and in particular relates to a device and method for measuring the rheological properties of supercritical carbon dioxide fracturing fluid. The measuring devices include: supercritical carbon dioxide pressurization system, viscosifier injection mixing system and supercritical carbon dioxide fracturing fluid circulation system; the critical carbon dioxide fracturing fluid circulation system provides supercritical carbon dioxide fracturing fluid with a closed circulation loop under high temperature and high pressure, The supercritical carbon dioxide pressurization system provides the required experimental pressure for carbon dioxide, and the viscosifier is injected into the mixing system to pump the viscosifier into the high-temperature and high-pressure supercritical carbon dioxide pipeline. The invention can realize the measurement of the rheological parameters of the supercritical carbon dioxide fracturing fluid in a relatively large pressure and temperature range, and can obtain the constitutive relationship of the rheological properties of the supercritical carbon dioxide fracturing fluid under different temperature and pressure conditions; the device is simple to operate and the method It is easy to implement and has high feasibility; the measurement method is scientific and can achieve high-precision parameter measurement.

The invention discloses a simple turning tool protractor. The simple turning tool protractor comprises a basic ruler, a rotary ruler and a sliding ruler. The basic ruler is of an L shape and is divided into a horizontal end and a vertical end, and a fan-shaped dial is arranged at the corner of the basis ruler. The rotary ruler is of an L shape, wherein the corner of the rotary ruler faces downwards, and the rotary ruler is rotatably connected with the circle center of the fan-shaped dial. An arc-shaped sliding groove is formed in the fan-shaped dial. A pointer is mounted on the dial. A boss of the pointer is mounted in the arc-shaped sliding groove in an embedded mode and connected with one end of the rotary ruler. The pointer can slide along the arc-shaped sliding groove. The sliding ruler is of an L shape, wherein one end of the sliding ruler is parallel to the horizontal end of the basic ruler, and the other end of the sliding ruler is connected with the vertical end of the basic ruler in a sliding mode. The basic ruler and the sliding ruler constitute an F-shaped whole. The simple turning tool protractor has the advantages that in the same two-dimensional plane, five basic turning tool angles can be measured, and the turning tool angles are obtained directly; the measuring efficiency is improved, the structure is simple, a scientific measuring method is adopted, cost is low, and a good teaching effect is achieved.

The invention discloses a method for measuring the bubble breaking point of a sieve, which is characterized in that the sieve to be tested is wetted with a liquid, and a liquid film is formed on the surface to form a closed space together with a cavity; the closed space is pressurized, and the The gas in the confined space is in a quasi-equilibrium state. Collect and draw the pressure-time curve of the gas in the confined space. When the pressurization rate drops and there is an inflection point, the pressure at the inflection point is the bubble breaking point of the screen to be tested. The invention determines the breakage of the liquid film on the surface of the screen through the change of the pressurization rate, thereby measuring the breaking point of the screen bubble. The problem of large data errors.

The invention discloses an online measurement method and device for the flow of three phases including crude oil, natural gas and water. According to the method, firstly, a three-phase mixture fluid of the crude oil, natural gas and water is heated to demanded temperature, the heat quantity is calculated, and the average specific heat and phase ratio of the three-phase mixture fluid are obtained.A Venturi tube in an inversely U-shaped pipe is used for measuring the average density of the three-phase mixture; a horizontal Venturi tube is used for measuring the total volume flow of the three-phase mixture fluid. Through combined calculation of the density, phase ratio and total volume flow of the mixture, the flow of the crude oil, natural gas and water can be figured out separately. By means of the online measurement method and device for the flow of the three phases including the crude oil, the natural gas and the water, the difficulty in measurement of the flow of the crude oil is solved, and the efficiency of heating a crude oil wellhead is improved. The measurement method is novel, unique and scientific, and the measurement device is reliable, free of components which are likely to be damaged, high in measurement precision and reliable in data.