Binary Corrosion Inhibitors Offer Improved Corrosion Control

Abstract

TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractAn improvement has been made in anti-corrosion chemicals for oilfield use. A binary corrosion inhibitor has been patented and field proven which combines an epoxy resin and an amine curing agent. The proper application of this unique combination of chemicals forms a bond with the oxide film present on downhole metal surfaces. The result is a corrosion inhibitor barrier that is more tenacious than conventional polar filming amines, reducing application frequency and labor costs, and even more importantly, downhole failures. The binary corrosion inhibitor is also an improvement over and is more versatile than other epoxy-amine products.

Research Advances of Microencapsulation and Its Prospects in the Petroleum Industry

“…The corrosion of well tubing and operating equipment adversely affects the oil recovery rate, and restricts the exploration of offshore platforms. However, it is arduous to treat the individual wells, which are widely dispersed geographically, and are inaccessible during operation [ 98 , 99 , 100 , 101 , 102 ]. The traditional corrosion inhibitors with their own defects are incapable of solving application problems, such as the adverse influence on the environment and performance instability [ 101 ], which will deteriorate the inhibitor efficiency and physical barrier properties in a short period.…”

“…However, it is arduous to treat the individual wells, which are widely dispersed geographically, and are inaccessible during operation [ 98 , 99 , 100 , 101 , 102 ]. The traditional corrosion inhibitors with their own defects are incapable of solving application problems, such as the adverse influence on the environment and performance instability [ 101 ], which will deteriorate the inhibitor efficiency and physical barrier properties in a short period. Microencapsulation of the corrosion inhibitor can extend the treatment over a period of time to avoid the need for frequent operation via controllable release, and decrease unfavorable interactions via protection from the outer sheath.…”

“…The enclosure membrane provides an isolation system for the corrosion inhibitor to avoid negative influences from the underground environment. To extend the treatment in time and space, diffusion through the micro holes on the surface of the membrane is a potential candidate [ 101 , 103 , 104 ], which has been explicitly introduced above. After exposure to the environment, the internal phase is supposed to form a passive film on the surface of the metal substrate.…”