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Solid corrosion and scale inhibitor and preparation method thereof

A corrosion and scale inhibitor, solid technology, used in chemical instruments and methods, earthwork drilling, wellbore/well components, etc. The problem of high investment is to achieve excellent corrosion and scale inhibition effect, reduce workload, and avoid maintenance costs.

Inactive Publication Date: 2009-12-30
天津开广工业水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a dosing equipment that can automatically add chemicals is installed on each oil well, not only the one-time investment is high, but also the daily maintenance costs and winter antifreeze power consumption expenses are also very high
Moreover, when the dosing equipment of a certain oil well breaks down, the automatic dosing may not be performed for a long time in the oil well.

Method used

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  • Solid corrosion and scale inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Each component of solid corrosion and scale inhibitor in the present embodiment is as follows:

[0029] Sodium hydroxyethylidene diphosphonate 5kg

[0030] Trisodium Phosphate 25kg

[0031] Zinc Chloride 20kg

[0032] Octadecyl primary amine 5 kg

[0033] Starch 5 kg

[0034] Sodium citrate 8 kg.

[0035] The steps of the preparation method are:

[0036] (1) Add the above materials into the mixer and mix thoroughly;

[0037] (2) The mixed material is dried at 50°C, and the dried material is placed in a dry place for subsequent use;

[0038] (3) Add the dried material to the granulator, and carry out granulation under normal temperature conditions;

[0039] (4) The material after the granulation is completed is sent to the tablet press immediately, and is compressed at normal temperature and under a pressure of 4 tons;

[0040] (5) The tablet after tablet compression is directly packaged to obtain the finished solid corrosion and scale inhibitor.

Embodiment 2

[0042] Each component of solid corrosion and scale inhibitor in the present embodiment is as follows:

[0043] Sodium Amino Trimethylene Phosphonate 15kg

[0044] Sodium tripolyphosphate 40 kg

[0045] Zinc Chloride 30kg

[0046] Tallow diamine 10 kg

[0047] Starch 10 kg

[0048] Sodium citrate 12 kg.

[0049] The steps of the preparation method are:

[0050] (1) Add the above materials into the mixer and mix thoroughly;

[0051] (2) The mixed material is dried at 80°C, and the dried material is placed in a dry place for subsequent use;

[0052] (3) Add the dried material to the granulator, and carry out granulation under normal temperature conditions;

[0053] (4) The material after the granulation is completed is sent to the tablet press immediately, and is pressed at normal temperature and under a pressure of 12 tons;

[0054] (5) The tablet after tablet compression is directly packaged to obtain the finished solid corrosion and scale inhibitor.

Embodiment 3

[0056] Each component of solid corrosion and scale inhibitor in the present embodiment is as follows:

[0057] Sodium hydroxyethylidene diphosphonate 10 kg

[0058] Sodium hexametaphosphate 30 kg

[0059] Zinc Chloride 25 kg

[0060] Tallow diamine 8 kg

[0061] Starch 8 kg

[0062] Sodium citrate 10 kg.

[0063] The steps of the preparation method are:

[0064] (1) Add the above materials into the mixer and mix thoroughly;

[0065] (2) The mixed material is dried at 60°C, and the dried material is placed in a dry place for subsequent use;

[0066] (3) Add the dried material to the granulator, and carry out granulation under normal temperature conditions;

[0067] (4) The material after the granulation is completed is sent to the tablet press immediately, and is compressed at normal temperature and under a pressure of 8 tons;

[0068] (5) The tablet after tablet compression is directly packaged to obtain the finished solid corrosion and scale inhibitor.

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Abstract

The invention relates to a solid corrosion and scale inhibitor and a preparation method thereof. The scale inhibitor comprises the following components by weight percentage: 5 to 15% of phosphonate, 25 to 40% of phosphate, 20 to 30% of zinc chlorine, 5 to 10% of amine, 5 to 10% of disintegrating agent and 8 to 12 percent of citrate. The solid corrosion and scale inhibitor provided by the invention has excellent corrosion and scale inhibition effect, and drug efficiency is 30-40 days through on-site testing; after operations are carried out according to drug adding cycle, the oil casing, oil pipes, tension rods and other equipment in each oil well can be well protected, thereby meeting requirements on the operating performance of oil rigs during secondary or tertiary oil recovery; meanwhile, the drug adding cycle is prolonged, thus reducing perambulation cycle of the oil wells for maintenance personnel, reducing workload of maintenance personnel, and solving the problem of larger maintenance costs caused by frequent maintenance on oil rigs in current oil field.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion and anti-scaling of oil well equipment, in particular to a solid corrosion and scale inhibitor and a preparation method thereof. Background technique [0002] With the development of oilfields, their reserves continue to decline. The more commonly used countermeasure is to carry out secondary or tertiary oil recovery on the oilfield. However, after applying this method, the water content in the oil well is also getting higher and higher, and some oil wells have even higher water content. Up to 90%, a large amount of minerals in the water make the corrosion and scaling of equipment such as oil well casing, oil pipe and tie rod very serious. Such as Jilin Oilfield Qian'an Oil Production Plant, the oil production plant has more than 1,400 oil wells, the water content of the oil wells is 30-90%, and the salinity of the water is very high (the salt content reaches tens of thousands of ppm). The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54C09K8/52
Inventor 张俊玲王华郭军
Owner 天津开广工业水处理有限公司
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