A kind of oil and gas well solid corrosion inhibitor and preparation method thereof

Abstract

The invention relates to a solid corrosion inhibitor for an oil and gas well and a preparation method thereof. The solid corrosion inhibitor comprises, by mass, 47-50% of modified rosin, 15-16.5% of polyol, 31-35% of a main agent, 1-3% of a flexibilizer and 1.5-3% of barium sulfate. The preparation method comprises the following steps of modified rosin synthesis: adding rosin into a stirring bottle and adding a modifier into the rosin to obtain modified rosin; and solid corrosion inhibitor preparation: adding barium sulfate into the modified rosin, adding polyol into the mixture, adding the liquid main agent and the flexibilizer into the mixture, pouring the mixture into a mold, and carrying out cooling molding to obtain a cylindrical solid finished product. The solid corrosion inhibitor can be prepared by simple processes, is convenient for construction, resists a high temperature, has a high comprehensive corrosion inhibition rate and a long corrosion inhibition period, greatly prolongs a service life of the production device, reduces a production cost and improves work efficiency.

Description

technical field [0001] The invention relates to a solid corrosion inhibitor for oil and gas well anticorrosion and a preparation method thereof, in particular to a long-acting solid corrosion inhibitor for oil and gas well downhole equipment high temperature anticorrosion and a preparation method thereof. Background technique [0002] Most of the structures and pipeline equipment in various links of the petroleum industry are made of carbon steel and low-alloy steel. They are often corroded by air, seawater, soil and various components in petroleum. For this reason, it can be effectively and economically To achieve the purpose of corrosion control. Most of the corrosion inhibitors currently used are organic corrosion inhibitors, and most of the organic corrosion inhibitors are liquid corrosion inhibitors. Liquid corrosion inhibitors have a series of advantages such as convenient use, easy preparation and compounding, etc., but in the process of use in oil and gas fields Som...

AI Technical Summary

Problems solved by technology

Most of the corrosion inhibitors currently used are organic corrosion inhibitors, and most of the organic corrosion inhibitors are liquid corrosion inhibitors. Liquid corrosion inhibitors have a series of advantages such as convenient use, easy preparation and compounding, etc., but in the process of use in oil and gas fields Some disadvantages are also exposed in the process: (1) filling requires equipment such as dosing pumps, which is inconvenient to use; (2) it is easy to adhere to the oil pipe wall, and the consumption of chemicals is large, causing unnecessary losses; (3) intermittent Injection dosing is uneven, and the effective protection time is short; (4) The effect of dosing is not good, and the cost of dosing is high; (4) Negative impact on the environment

Due to the lack of anti-corrosion effect of the above-mentioned dosing of liquid corrosion inhibitors and the complexity of its operation, it is necessary to research and develop solid corrosion inhibitors

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