Preparation method of solid corrosion-inhibition scale-inhibition bar used for oil field

Abstract

The invention discloses a preparation method of a solid corrosion-inhibition scale-inhibition bar used for an oil field, which relates to a production method of a chemical medicament used for the oil field. The preparation method comprises the following steps of: (1) mixing 30 to 40 percent of 2-phosphonobutane-1,2,4-tricarboxylic acid, 10 to 15 percent of polyethylene glycol, 10 to 15 percent ofsodium hexametaphosphate, 15 to 25 percent of Span-60 and 20 to 30 percent of stearic acid evenly, wherein the percent is the mass percent of the sum of each component occupying all the components; and (2) putting all the evenly mixed components into a bar type mold, pressing into a bar type by using a press machine and forming a finished product, wherein the pressure applied by the press machineis 15 to 20 tons. The method has the advantages of simple preparation process, even mixing of the components, trouble saving and labor saving, so that the method is suitable for mass and industrialized production and large-scale popularization and application.

Description

technical field [0001] The invention relates to a production method of a chemical agent used in an oil field. The chemical agent is mainly a solid corrosion and scale inhibition rod used for oil and gas well shafts and gathering pipelines for anticorrosion and scale inhibition. The solid corrosion and scale inhibition rod prepared by the method It is especially suitable for oil and gas well shafts with severe corrosion and scaling. Background technique [0002] In the process of oil and gas field development, the problem of corrosion and scaling of downhole pipe strings and equipment is often encountered. Among them, adding liquid corrosion and scale inhibitors to oil and gas wells is a common anti-corrosion and scale prevention measure, but there are the following problems: [0003] ① For wells with large gas production and liquid production, the liquid agent added is easy to be taken out quickly, and the effective protection period of the agent is short, which increases th...

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Problems solved by technology

[0003] ① For wells with large gas production and liquid production, the liquid agent added is easy to be taken out quickly, and the effective protection period of the agent is short, which increases the cost of anti-corrosion and scale inhibition;

[0004] ②Because the oil and gas field has entered the late stage of production, water is generally produced in the well, and for high water level wells, the corrosion and scale inhibitor injected from the casing is difficult to reach the inlet of the pump, so the protection effect on the pump, sucker rod and tubing is not enough ideal;

[0005] ③The filling operation of liquid medicine requires injection pumps, balance tanks, pump injection trucks and other filling devices, and the well needs to be shut down, which increases the cost and affects the output;

[0006] ④The liquid agent is easy to adhere to the oil pipe wall, causing unnecessary loss

[0012] However, the above methods generally have disadvantages such as uneven mixing of agents, cumbersome processing procedures, time-consuming and labor-consuming, and are not suitable for large-scale, industrialized production and large-scale application.