Low-shear polymer flow regulating valve

Abstract

The invention discloses a low-shear polymer flow regulating valve. The low-shear polymer flow regulating valve comprises a valve body, a valve seat, a valve core, a bracket, a valve rod, a copper sleeve and an end plug, wherein the valve seat is mounted in the valve body; the valve core is directionally mounted in the center of the valve seat; a cylindrical inlet flow channel is formed in the lower part of the valve core in the axial direction, and a cylindrical outlet flow channel is formed in the lower part of the valve core in the radial direction; the inlet flow channel and the outlet flowchannel are in transition through a spherical surface; the top of the valve core is connected with the lower end of the valve rod; the upper end of the valve rod penetrates through the end plug to allow external adjusting; a spacing ring is arranged on the valve rod; the valve rod is positioned between the valve seat and the end plug through the copper sleeve and the bracket, and can be used forregulating the relative position between the valve core and the valve seat, so that functions of low-shear polymer flow magnitude regulating and valve closing are realized. According to the low-shearpolymer flow regulating valve provided by the invention, the valve core does not shear the high-speed fluid in the middle of the flow channel, and the throttling flow channel is short, so that the shearing viscosity reduction on a polymer mother solution can be ignored. The low-shear polymer flow regulating valve is simple in structure and small in size, can finely regulate flow capacity, and hasgood application prospects.

Description

technical field [0001] The invention relates to the technical field of oil exploitation equipment, in particular to a low-shear polymer flow regulating valve used in an oil field polymer injection surface system. Background technique [0002] In the tertiary oil recovery method of enhanced oil recovery, the use of polymers as oil displacement agents plays an important role. In order to save the investment cost of engineering equipment and reduce operation and maintenance costs, the polymer injection surface system usually adopts the "single pump to multiple wells" process, which requires pumping out the concentratedly prepared and matured high-viscosity polymer mother liquor and then pumping out the high-viscosity polymer mother liquor through valves to different single wells. Carry out flow distribution, and then dilute to the specified concentration and then inject into the reservoir to drive oil. For ordinary flow regulating valves, due to structural reasons, especially ...

AI Technical Summary

Problems solved by technology

For ordinary flow regulating valves, due to structural reasons, especially the adjustment mechanism, the polymer mother liquor has a large shear rate, resulting in a significant drop in the viscosity of the polymer mother liquor, which is a power-law non-Newtonian fluid.

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