Sand-filling type clamp fastener for nuclear magnetic resonance imaging

Abstract

The invention relates to a sand-filling type clamp fastener for nuclear magnetic resonance imaging, which belongs to the technical field of scientific research apparatuses for petroleum. The sand-filling type clamp fastener is vertically inserted into a micro-imaging probe of a nuclear magnetic resonance imager, the design pressure is 0-15MPa, and the design temperature is 0-70 DEG C. The sand-filling type clamp fastener can be used for carrying out indoor experiment research on the seepage and transport properties of a multi-phase multi-component fluid in an analog core. Besides a seal ring, all components of the sand-filling type clamp fastener are made from a polyamide-imide material which does not have magnetism, meets the high-temperature high-pressure requirements and has no effect on nuclear magnetic signals. The sand-filling type clamp fastener has the advantages of compact design structure, multiple times of filling, repeatability of use, convenience of operation in an experiment process, simplicity and applicability.

Description

technical field [0001] The invention relates to a sand-filled clamper for nuclear magnetic resonance imaging, which belongs to the technical field of petroleum scientific research instruments. Background technique [0002] Magnetic resonance imaging technology has the characteristics of fast, non-destructive and intuitive display, and can image nuclear spin density, relaxation time (longitudinal and transverse), fluid flow velocity, self-diffusion coefficient, and selective imaging based on chemical shift or relaxation time , is one of the most powerful tools for studying the skeleton structure of porous media and the fluid flow inside it. Since MRI technology was introduced into the visual detection experiment of oil displacement physical simulation in the 1980s, nuclear magnetic resonance imaging technology has been widely used in water flooding, polymer flooding, chemical flooding and other displacement experiments, but it is not suitable for high temperature and high p...

AI Technical Summary

Problems solved by technology

In order to meet the wide application requirements of nuclear magnetic resonance technology in the field of petroleum research, the famous Temco core analysis instrument company began to provide it with a special ring pressure core holder as early as the mid-1980s, but for sand-filled holders , especially products suitable for the narrow cavity of the micro-imaging probe of high-field NMR instrument have not been reported yet

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