Bacteriostatic process for washing and coating oilfield water injection pipeline

Abstract

The invention provides a bacteriostatic process for washing and coating an oilfield water injection pipeline. The process comprises the following steps of: 1) preliminarily descaling and washing the internal part of the pipeline; 2) performing primary drying treatment on the descaled and washed pipeline; 3) coating the pipeline; and 4) performing secondary drying treatment on the coated pipeline. Compared with the prior art, the process provided by the invention has the advantages that 1, the water injection rate can be effectively increased, the service life of the pipeline can be prolonged, and the device replacement cost can be reduced; 2, the propagation of iron bacteria, saprophytic bacteria TGB (Total Growth Bacteria) and sulfate reducing bacteria SRB in the water injection pipeline can be effectively controlled, and the chemical dosage for the running is reduced; 3, a device for the process is simple, the transportation is unnecessary to stop in the washing process, the pipeline is not corroded, the environment is not polluted, and the operation is convenient; and 4, seen from the site construction application situation, the internal part of the water injection pipeline measured by eyes is smooth, and the coating is uniform, and the washing quality requirement of the water injection pipeline is satisfied completely.

Description

technical field [0001] The invention relates to the technical field of pipeline cleaning and coating, in particular to an oil field water injection pipeline cleaning and coating antibacterial process. Background technique [0002] Industrial pipelines, especially in the oil field water injection system, some new and old water injection pipelines need to be derusted and descaled. The current cleaning is mainly carried out by the pig cleaning process; in the previous water injection pipeline pig cleaning process, Since only rust and scale removal processes are carried out, after the water injection pipeline is cleaned and put into operation for a period of time, a large number of bacteria and microorganisms will grow in the water injection pipeline, and the cleaning can only achieve short-term results. In the actual application of the water injection pipeline, it is necessary to reduce bacteria as much as possible and microbial growth. The cleaning process of the water inject...

AI Technical Summary

Problems solved by technology

The cleaning process of the water injection pipeline used in the past, the process flow is: use a specific pig to perform the descaling and cleaning process, but only the cleaning process is not conducive to the long-term operation of the water injection pipeline, and it does not prevent the growth of bacteria and microorganisms and reduce the dosage In practical application, it only achieves the effect of descaling and cleaning, but does not meet the requirements for continuous production of water injection pipelines.