阅读说明：本技术 一种用于采油输油设备析垢除垢的缓蚀阻垢剂及制备方法 (Corrosion and scale inhibitor for scale precipitation and removal of oil extraction and transportation equipment and preparation method thereof ) 是由 李劭乾 刘澍 于 2021-08-09 设计创作，主要内容包括：本发明公开一种用于采油输油设备析垢除垢的缓蚀阻垢剂及制备方法,该用于采油输油设备析垢除垢的缓蚀阻垢剂由以下原料组成：双咪唑啉季铵盐15-40％、苯并三氮唑0.2％-1％、聚环氧琥珀酸25％-45％、助溶剂5％-15％,该制备方法具体包括以下步骤：步骤一：将聚环氧琥珀酸、双咪唑啉季铵盐、水,常温下按照配比依次加入反应釜中,进行搅拌；步骤二：此后加入苯并三氮唑、助溶剂搅拌使其完全溶解,继续搅拌,混匀后静置,得到缓蚀阻垢剂；本发明适用油田输油设备运行条件,阻垢和缓蚀性能均优异,各组分之间具有良好的协同性,不易分解,具有优异的缓蚀阻垢性能,本发明的复合剂成本低,容易复配,稳定性好,用量低。(The invention discloses a corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment and a preparation method thereof, wherein the corrosion and scale inhibitor for scale analysis and removal of the oil extraction and transportation equipment comprises the following raw materials: 15-40% of bisimidazoline quaternary ammonium salt, 0.2-1% of benzotriazole, 25-45% of polyepoxysuccinic acid and 5-15% of cosolvent, wherein the preparation method specifically comprises the following steps: the method comprises the following steps: adding polyepoxysuccinic acid, bisimidazoline quaternary ammonium salt and water into a reaction kettle in sequence according to the proportion at normal temperature, and stirring; step two: then adding benzotriazole and cosolvent, stirring to completely dissolve the benzotriazole and cosolvent, continuously stirring, uniformly mixing, and standing to obtain the corrosion and scale inhibitor; the invention is suitable for the operation condition of oil field oil transportation equipment, has excellent scale inhibition and corrosion inhibition performance, has good cooperativity among all components, is not easy to decompose, has excellent corrosion inhibition and scale inhibition performance, and has the advantages of low cost, easy compounding, good stability and low dosage.)

1. A corrosion and scale inhibitor for scale separation and removal of oil extraction and transportation equipment is characterized in that: the corrosion and scale inhibitor for scale precipitation and removal of oil extraction and transportation equipment consists of the following raw materials: 15-40% of bisimidazoline quaternary ammonium salt, 0.2-1% of benzotriazole, 25-45% of polyepoxysuccinic acid and 5-15% of cosolvent.

2. A preparation method of a corrosion and scale inhibitor for scale precipitation and scale removal of oil extraction and transportation equipment is characterized by comprising the following steps:

the method comprises the following steps: adding polyepoxysuccinic acid, bisimidazoline quaternary ammonium salt and water into a reaction kettle in sequence according to the proportion at normal temperature, and stirring;

step two: then adding benzotriazole and cosolvent, stirring to make them completely dissolve, continuously stirring, uniformly mixing them, standing so as to obtain the invented corrosion-inhibiting scale-inhibiting agent.

3. The preparation method of the corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment according to claim 2 is characterized in that: the mixing and stirring time in the first step and the second step is 27-33 min.

4. The preparation method of the corrosion and scale inhibitor for scale deposition and removal of oil extraction and transportation equipment according to claim 1 is characterized in that: the cosolvent is composed of acetic acid and isopropanol, and the ratio of the acetic acid to the isopropanol is 2: 1.

Technical Field

The invention relates to the field of chemical cleaning agents, and relates to a corrosion and scale inhibitor for scale precipitation and scale removal of oil extraction and transportation equipment and a preparation method thereof.

Background

During the oil extraction and transportation process of the oil field, a large amount of scale is generated in the pipeline and the accessory equipment and is attached to the surface of the equipment, so that the pipeline is blocked, the transportation capacity is reduced, and the normal production operation is influenced; in order to remove the scale, the prior domestic methods such as physical cleaning, chemical cleaning and the like are generally adopted, so that the scale cannot be softened and loosened, and the cleaning cannot be carried out more thoroughly and more quickly.

Disclosure of Invention

The invention aims to provide a corrosion and scale inhibitor for scaling and descaling oil extraction and transportation equipment and a preparation method thereof, which solve the technical problems that the scale quality cannot be softened and loosened and cannot be cleaned more thoroughly and more quickly by adopting physical cleaning, chemical cleaning and other methods commonly adopted at home at present in the prior art; the invention is suitable for the operation condition of oil field oil transportation equipment, and has excellent scale inhibition and corrosion inhibition performance; the components have good cooperativity, are not easy to decompose and have excellent corrosion and scale inhibition performance; the complexing agent disclosed by the invention is low in cost, easy to compound, good in stability and low in dosage; the pH value is in the range of 2-4, and the self-adaptive automatic control function is realized.

The purpose of the invention can be realized by the following technical scheme:

a corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment comprises the following raw materials: 15-40% of bisimidazoline quaternary ammonium salt, 0.2-1% of benzotriazole, 25-45% of polyepoxysuccinic acid and 5-15% of cosolvent;

a preparation method of a corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment comprises the following steps:

the method comprises the following steps: adding polyepoxysuccinic acid, bisimidazoline quaternary ammonium salt and water into a reaction kettle in sequence according to the proportion at normal temperature, and stirring;

step two: then adding benzotriazole and cosolvent, stirring to make them completely dissolve, continuously stirring, uniformly mixing them, standing so as to obtain the invented corrosion-inhibiting scale-inhibiting agent.

Furthermore, the mixing and stirring time in the step one and the step two is 27-33 min.

Further, the cosolvent is composed of acetic acid and isopropanol, and the ratio of the acetic acid to the isopropanol is 2: 1.

The invention has the beneficial effects that:

1. the scale and corrosion inhibition agent is suitable for the operation conditions of oil field oil transportation equipment, and has excellent scale and corrosion inhibition performance;

2. the components have good cooperativity, are not easy to decompose and have excellent corrosion and scale inhibition performance;

3. the complexing agent disclosed by the invention is low in cost, easy to compound, good in stability and low in dosage;

4. the pH value is in the range of 2-4, and the self-adaptive automatic control function is realized.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment.

A corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment comprises the following raw materials: 15-40% of bisimidazoline quaternary ammonium salt, 0.2-1% of benzotriazole, 25-45% of polyepoxysuccinic acid and 5-15% of cosolvent;

the bis-imidazoline quaternary ammonium salt has no special pungent smell, good thermal stability, low toxicity, good biodegradability, environmental protection, strong molecular coverage capability of the synthesized bis-imidazoline quaternary ammonium salt and high corrosion inhibition efficiency;

polyepoxysuccinic acid is a phosphorus-free and nitrogen-free green water treatment agent, and is prepared by inserting oxygen molecules into polymaleic acid scale inhibitor molecules to ensure that the polymaleic acid scale inhibitor has good scale inhibition performance, has strong calcium chelating capacity, is phosphorus-free and nitrogen-free, is easy to biodegrade, is suitable for cooling water systems under the conditions of high alkali, high hardness and high pH value, and is a high-efficiency scale inhibition dispersant with corrosion inhibition performance.

Benzotriazole (BTA), the anion and cuprous ion of which form an insoluble, extremely stable complex which is adsorbed on the metal surface to form a stable, inert protective film to protect the metal, which has a good effect on inhibiting copper corrosion, especially in closed water systems.

A preparation method of a corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment comprises the following steps:

the method comprises the following steps: adding polyepoxysuccinic acid, bisimidazoline quaternary ammonium salt and water into a reaction kettle in sequence according to the proportion at normal temperature, and stirring;

step two: then adding benzotriazole and cosolvent, stirring to make them completely dissolve, continuously stirring, uniformly mixing them, standing so as to obtain the invented corrosion-inhibiting scale-inhibiting agent.

The mixing and stirring time in the first step and the second step is 27-33 min.

The cosolvent is composed of acetic acid and isopropanol, and the ratio of the acetic acid to the isopropanol is 2: 1.

Example two.

The component proportions are shown in the following table:

a preparation method of a corrosion and scale inhibitor for scale analysis and removal of oil extraction and transportation equipment comprises the following steps:

the method comprises the following steps: adding polyepoxysuccinic acid, bisimidazoline quaternary ammonium salt and water into a reaction kettle in sequence according to the proportion at normal temperature, and stirring for 30 min;

step two: and then adding benzotriazole and cosolvent, stirring to completely dissolve the benzotriazole and cosolvent, continuously stirring, uniformly mixing, and standing to obtain the corrosion and scale inhibitor for min.

Based on the above examples, the corrosion rates for carbon steels at different formulations are shown in the following table:

the dosage is 30mg/l	Formulation A	Formulation B	Formulation C	Formulation D
					Carbon steel mm/a	0.0265	0.0245	0.0232	0.0278

The corrosion rate of the carbon steel of the formula C is slightly better than that of the carbon steel of other groups;

based on formulation C, the carbon steel corrosion rates at different dosing concentrations are as follows:

adding medicine amount mg/l	0	25	30	35
					Carbon steel mm/a	0.9881	0.0834	0.0232	0.0187

As can be obtained from the table above, the corrosion of the carbon steel coupon without adding the medicament is serious, and when the adding amount of the formula C is 30mg/l, the corrosion rate of the carbon steel is 0.0232 mm/a;

based on the above examples, the scale inhibition effect for different formulations is as follows:

from the results obtained in the table above, it can be seen that each group of formulations has good scale inhibition effect.

Based on the above embodiment, the descaling experiment of the oil production and transportation equipment in the production field is as follows:

under the water quality condition, the complexing agent is used for tracking the actual use effect on site when the water temperature of a production site is between 60 and 70 ℃, the running time is 28 days, the carbon steel corrosion rate can reach 0.0359mm/a, a circulating water running pipeline is opened to check that no scaling imagination is found, and the field use effect is good.

The invention has the advantages that:

the components have good cooperativity, so that the composite medicament has excellent corrosion and scale inhibition performance.

Is especially suitable for the water quality with high hardness, high alkalinity and high temperature in the closed water quality condition of the blast furnace.

The complexing agent disclosed by the invention is easy to compound, good in stability, low in cost, very convenient to operate and manage and beneficial to ensuring the treatment effect.

The complexing agent of the present invention belongs to a non-phosphate agent, has the function of inhibiting microorganisms, has stable performance under the high temperature condition, and does not contain toxic substances, so the complexing agent of the present invention is favorable for environmental protection.

Aiming at scale deposition and removal of oil extraction and oil transportation equipment, the composite corrosion and scale inhibitor is suitable for water quality conditions of high hardness, high alkalinity and high temperature, has high scale inhibition performance and corrosion inhibition effect, is difficult to achieve by using a corrosion and scale inhibitor for conventional oil extraction and oil transportation equipment, and can meet the requirement and achieve good effect only.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.