39results about How to "Improve the effective permeability" patented technology

A method of manufacturing an amorphous alloy core including the steps of mixing an amorphous alloy powder with a solution made by dissolving a polyimide / phenolic resin binder in an organic solvent, evenly coating the binder in liquid phase on the surface of the alloy powder to make a powder of composite particles, molding the power of composite particles, and performing a heating treatment thereon. This invention also discloses a method of manufacturing a nano-crystal alloy core including the steps of (a) mixing an amorphous alloy powder with a solution made by dissolving a polyimide / phenolic resin binder in an organic solvent, evenly coating the binder in the liquid phase on the surface of the alloy powder to make composite particles, molding the composite particles at room temperature, and performing a heating treatment thereon at a temperature higher than the crystallization starting temperature of the alloy; and (b) performing a heating treatment on an amorphous alloy powder at over a crystallization starting temperature to make a nano-crystal phase, mixing a solution made by solving a polyimide / phenolic resin binder in an organic solvent therewith, evenly coating the binder in liquid phase on the surface of the alloy powder to make composite particles, and molding the power of composite particles at 100 to 300° C.

According to an aspect of the present invention, a wireless power transmitting apparatus of a wireless charging system includes a substrate, a first bonding layer formed on the substrate, a soft magnetic layer formed on the first bonding layer, a second bonding layer formed on the soft magnetic layer and a transmitting coil formed on the second bonding layer, wherein at least one of the first bonding layer and the second bonding layer includes a magnetic substance.

Methods for reducing fines migration in a porous subterranean reservoir. In certain aspects, the methods include introducing a composition including a water-soluble or dispersible branched polyhydroxyetheramine into the porous subterranean reservoir, maintaining a sufficient temperature in the porous subterranean reservoir for a period of time, adsorbing the composition onto a surface of the porous subterranean reservoir, and stabilizing at least a portion of the fines present in the porous subterranean reservoir. A treatment composition can be used and in certain aspects, the treatment composition can be a reaction product of bisphenol A, an ethanol amine, diethanol amine, and a monofunctionalized polyoxyalkyleneamine.

The invention discloses a slow blockage removing agent for an oil well and a blockage removing method, and belongs to the technical field of oil field exploitation. The slow blockage removing agent is prepared from prepad fluid, main fluid and post-pad fluid, the prepad fluid and the post-pad fluid both take hydrochloric acid as the main component of acid fluid for removing inorganic scale precipitation and dissolving reaction residues, and the main fluid takes glacial acetic acid and fluoboric acid as the main components of acid fluid for stabilizing clay mineral of a reservoir stratum, decreasomg the acid rock reaction speed, enlarging the blockage removing radius and increasing the blockage removing depth. For a fracturing production horizontal well, the treatment fluid is injected into the reservoir stratum in the former stage, the intermediate stage and the later stage, and liquid nitrogen is simultaneously injected, so that residual reaction fluid can be quickly drained after blockage removing construction is performed; pollution blockage near a well bore of the oil well can be effectively removed, the effective permeability near the well bore is increased, the individual-well producing rate is increased, damage caused by excessive acid corrosion to the rock framework of the reservoir stratum can be avoided, and therefore the reservoir stratum can be prevented from being subjected to secondary damage.