Solid-liquid mixing jet device

Abstract

The invention discloses a solid-liquid mixing jet device which comprises a dry powder input pipe, an adjusting nozzle arranged at the outlet end of the dry powder input pipe in a sleeving mode, a liquid input pipe arranged on the outer side of the adjusting nozzle in a sleeving mode, and an output pipe coaxial with the dry powder input pipe. The output pipe comprises a reducing section of which the inner diameter is gradually reduced, a throat pipe section of which the inner diameter is consistent and a flaring section of which the inner diameter is gradually increased, which are connected insequence; liquid with certain pressure is fed into the liquid input pipe, and the outlet end of the liquid input pipe is connected with the end part of the reducing section of the output pipe; an annular gap for liquid to pass through is formed between the adjusting nozzle and the inner wall of the reducing section of the output pipe; and the dry powder input pipe is sleeved with a piston piece, the adjusting nozzle is fixed to the piston piece, and the piston piece drives the adjusting nozzle to move in the axial direction of the output pipe to change the size of the annular gap. The solid-liquid mixing jet device can accelerate the flow speed of dry powder and adjust the flow and flow speed of liquid, and a large number of solutions and high-concentration solutions are easy to prepare through the synergistic effect of the dry powder and the liquid.

Description

Technical field[0001]The invention relates to the field of chemical flooding for petroleum exploitation, in particular to a gas-solid jet for polymer dispersion devices.Background technique[0002]Petroleum extraction is generally divided into three stages: usually the use of oil layer energy to extract oil is called primary oil recovery; the injection of water and gas into the oil layer to supplement energy to extract oil is called secondary oil recovery; and the use of chemical substances to improve oil and gas The mutual performance of water, water and rock produces more oil, which is called tertiary oil recovery. And chemical flooding has become one of the important means of stabilizing production in the third mining stage. The so-called chemical flooding, also known as modified water flooding chemical method, refers to adding chemical agents to injected water to change the physical and chemical properties of the displacement fluid and the interface properties between the displace...

AI Technical Summary

Problems solved by technology

[0004] The structure of the existing ejector is single, it is easy to cause blockage of the powder pipe, the capacity of the ejector is limited, and the general preparation volume is only 60m 3 / h, the preparation concentration is 5000-6000ppm, and the suction distance is only more than 2m

Today, when the chemical expulsion step has become the main means of improving oil recovery, new and higher requirements are constantly put forward for the polymer solution preparation process (higher solution concentration, larger solution preparation volume, more accurate preparation of solution concentration, providing Higher suction lift, etc.); at the same time, in different tertiary oil recovery processes, when configuring polymer solutions with different concentrations, it is necessary to adjust the relative addition of dry powder and water. In the existing polymer dispersion device, it is necessary to control the dry powder and water separately. The amount of water added, and the amount of dry powder added can only be adjusted by adjusting the gas flow rate of the ejector. This adjustment method has relatively large limitations, which is not conducive to the accurate preparation of the concentration of the polymer solution and the polymer solution with a higher concentration.

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