4 results about "Particle flow" patented technology

The invention belongs to the field of petroleum engineering, and provides a method for predicting the surface washout topography of a petroleum drilling tool. The method comprises the following steps: carrying out three-dimensional numerical modeling for the multiphase flow containing solid-phase particles flowing through the surface of the drilling tool; selecting a proper discrete format and a turbulence model to solve the numerical value of the multiphase flow containing solid-phase particles flowing through the surface of the drilling tool to obtain the washout rate of the solid-phase particles against the surface of the drilling tool; according to the obtained washout rate, regulating a computing grid for the surface of the drilling tool; and solving the numerical value of the new grid to obtain a new washout topography until the final computing time is up. In the invention, through analysis and research on the washout process of the fluid medium containing solid-phase particles against the surface of the drilling tool, the range of the working conditions required for generating washout against the surface of the drilling tool is defined, an effective path for obtaining the washout topography and the washout rate against the surface of the drilling tool with a numerical number simulation method is provided, and a prediction method is provide for the washout problems of drilling tool.

A fluid handling device according to the present invention is a fluid handling device for arranging a plurality of particles in one column while separating the particles from one another, to recover the same from a mixed solution in which the plurality of particles are collected in a surface layer or a bottom layer of a liquid. The fluid handling device according to the present invention comprises: an immersed portion for immersion in the liquid; a particle intake port opening in a surface of the immersed portion; a liquid intake port opening in a surface of the immersed portion; a particle flow passage; a liquid flow passage; a merging portion where the particle flow passage and the liquid flow passage merge; and a merged flow passage disposed downstream of the merging portion.