Non-stop production subsea pipeline ball-throwing and anti-scaling agent compound descaling technology

Abstract

The invention discloses a non-stop production subsea pipeline ball-throwing and anti-scaling agent compound descaling technology. A ball-throwing inlet is formed in the end, close to a crude oil inlet, on a subsea pipeline, and a ball-throwing outlet is formed in the end, close to a crude oil outlet, on the subsea pipeline; crude oil flows in a non-stop production mode from the crude oil inlet tothe crude oil outlet, a first pipe cleaning machine is put in first through the ball-throwing inlet, a second pipe cleaning pipe is put in after the first pipe cleaning machine flows out of the ball-throwing outlet, anti-scaling agents are put in through the crude oil inlet when the second pipe cleaning machine flows to a quarter of the length of the subsea pipeline, the second pipe cleaning machine is put in again when the anti-scaling agents are put in for 6-8 h, putting-in of the second pipe cleaning machine and the anti-scaling agents and the putting-in of the second pipe cleaning pipe again is a whole cleaning process, and the whole cleaning process is repeated until the last discharge of dirt weight is less than 3kg. The non-stop production subsea pipeline ball-throwing and anti-scaling agent compound descaling technology can effectively remove the dirt accumulated in the subsea pipeline, and can simultaneously carry out the subsea pipeline descaling operation without stopping production.

Description

technical field [0001] The invention relates to a sea pipe descaling process. More specifically, the present invention relates to a composite descaling process of non-stop sea pipe ball throwing and descaling agent, which belongs to the technical field of sea pipe descaling. Background technique [0002] Submarine pipelines run for a long time, and impurities such as dirt, wax crystals, and high-molecular organic matter will be deposited inside the pipeline, which will affect the transmission efficiency. In order to ensure the normal operation of the sea pipeline, it is necessary to regularly clean the inside of the sea pipe for cleaning. In the current pigging and descaling process, most of them use a single ball descaling (that is, put a pig into the pipeline, and the pig will take away the dirt during the flow) method or chemical descaling (that is, Putting a descaling agent into the pipeline, the descaling agent reacts with the dirt to dissolve the dirt and discharge i...

AI Technical Summary

Problems solved by technology

In the current pigging and descaling process, most of them use a single ball descaling (that is, put a pig into the pipeline, and the pig will take away the dirt during the flow) method or chemical descaling (that is, Putting a descaling agent into the pipeline, the descaling agent reacts with the dirt to dissolve the dirt and discharge it) method, but because the pipeline of the sea pipeline is generally long, and after a long period of operation, the amount of dirt accumulated in the pipeline is large, and in the Sticky impurities such as oil stains are often attached to the dirt surface, and it is difficult to achieve a good pigging and descaling effect with a single descaling method

In addition, most of the current pigging and descaling processes need to be carried out when production is stopped, which will greatly reduce the transmission efficiency

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