METHODS AND COMPOSITIONS FOR HEAT TREATMENT OF PIPELINE USED FOR EXTRACTION OR TRANSPORTING HYDROCARBON, ALSO METHODS AND COMPOSITIONS FOR FACILITATING REMOVAL OF SOLID PARAFFINES DEPOSITS Russian patent published in 2010 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas industry, particularly to methods of removal deposits in pipelines for hydrocarbon extraction and transporting. Here are disclosed methods of raising temperature of a pipeline section, methods of control of release of reagents and catalyst of exothermic reaction and produced products. According to one version the method consists in following stages: preparing processing liquid which contains carrying liquid; and the first and the second reagents; supplying processing liquid into a section of a pipeline used for extraction or transport of hydrocarbons. The first and the second reagents are chosen to react one with another in exothermal chemical reaction; both the first and the second reagents are present in carrying liquid in concentration at least sufficient to generating theoretic heat of reaction at amount of at least 1000 kJoule/l of processing liquid. At least certain amount of at least one of the first and the second reagents is suspended in carrying liquid in solid form accommodated to assist control of reagent release into carrying liquid. According to another version of the invention there can be used catalyst suspended in carrying liquid.

EFFECT: raised efficiency of deposit removal due to control over process of heat treatment.

69 cl, 8 dwg