Three-compound combination flooding scale-prevention water and chemical adding device for wellhead

Abstract

The invention relates to a liquid chemical blending device, in particular to a three-compound combination flooding scale-prevention water and chemical adding device for a wellhead. The device comprises a chemical storage box, a blender and a water source delivery pipe used for being connected with a tap water source. The blender is provided with an inlet and an outlet. The lower end of the chemical storage box is connected with the inlet of the blender through a liquid chemical delivery pipe. The liquid chemical delivery pipe is connected with a first switching valve, a first flow regulating valve and a charge pump. The outlet end of the water source delivery pipe is connected with the inlet of the blender. The water source delivery pipe is connected with a second switching valve, a second flow regulating valve and a water pump. The outlet of the blender is connected with a pressure gauge, a discharge pipe and a safety valve in parallel. The outlet end of the safety valve is connected with the chemical storage box. The discharge pipe is connected with a discharge valve and a check valve. According to the device, the problem that in the prior art, the concentration of prepared liquid chemical is unstable is solved, and the adding ratio of the liquid chemical to water and the adding speed can be well controlled.

Description

technical field [0001] The invention relates to a medicinal liquid preparation device, in particular to a three-element compound flooding and anti-scaling wellhead mixing and dosing device. Background technique [0002] With the improvement of oil field exploitation, the field test scale of ASP flooding is expanding day by day. In the ternary system composed of alkali, polymer and surfactant (A.S.P), alkali is an important component in the formula. The composition of the ASP flooding injection and production system has a tendency to cause scaling, which affects the normal production of the oil well. Practice has proved that the method of adding chemicals to the wellhead-chemical descaling can effectively prolong the pump inspection period. [0003] In the prior art, the injection of the anti-scaling agent adopts the general wellhead dosing, but because the agent is too thick, it is necessary to add the amount of water into the cartridge, and the dosing is manually performed ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of unstable concentration of medicinal solution in the prior art, and to provide a three-element compound flooding and anti-scaling wellhead mixing and dosing device that can better control the dosage and speed of medicinal solution and water

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