Novel self-plug-removal pipe cleaner for oil delivery pipeline

Abstract

The invention belongs to the field of submarine oil pipeline cleaning and relates to a novel self-plug-removal pipe cleaner for an oil delivery pipeline. Self plug removal can be conducted when the pipe cleaner is plugged, the two motion modes of axial impact and circumferential rotating can be achieved, and wax sediments on the inner wall of the pipeline are crushed by volume. The novel self-plug-removal pipe cleaner is driven by packing leathers, and a servo motor is used for controlling an axial impactor to achieve the impact effect on the wax sediments; a safety device is designed, when awax layer is hard and consequently, axial force is increased, a cutterhead can continue to rotate through the safety device to prevent overload of the motor; and a drainage hole is designed, the wax sediments in front of the pipe cleaner can be blown away in time, and wax plugging is prevented. Compared with other existing self-plug-removal pipe cleaners, the novel self-plug-removal pipe cleaner has the maximum characteristics that the wax removing efficiency is high, and a coating on the inner wall of the pipeline is not damaged.

Description

technical field [0001] The invention belongs to the field of seabed oil pipeline cleaning, and in particular relates to a novel oil pipeline self-blocking cleaning pig, which can more effectively solve the jamming problem. Background technique [0002] Pigging is an important task before the pipeline is put into production or during operation. The purpose is to improve the cleanliness of the pipeline and the transmission efficiency. It is of great significance to ensure the safety of the pipeline and reduce the energy consumption of the pipeline. Due to the temperature difference between the crude oil and the pipe wall, this will cause the wax molecules in the crude oil to precipitate and adhere to the inner wall of the pipe. As the operation time goes by, the wax layer becomes thicker. The strength of the sediment increases, which will cause the pig to be stuck in the pipeline, resulting in the suspension of the pipeline and causing huge economic losses. [0003] At presen...

AI Technical Summary

Problems solved by technology

Due to the temperature difference between the crude oil and the pipe wall, this will cause the wax molecules in the crude oil to precipitate and adhere to the inner wall of the pipe. As the operation time goes by, the wax layer becomes thicker. The strength of the sediment increases, which will cause the pig to be stuck in the pipeline, resulting in the suspension of the pipeline and causing huge economic losses

[0003] At present, there are the following problems in the self-declogging pig: the high-pressure water jet pig is easy to erode the inner wall coating of the pipeline, and the response to the increase of back pressure is sluggish; at the same time, the high-pressure water jet consumes a lot of water resources; the self-destruct pig When the pig is blocked, it will self-destruct to prevent the pipeline from being blocked, but its cost is high, and the debris generated by the self-destruction is likely to become new deposits in the pipeline; although the gel pig is not easy to be blocked, it is wear-resistant Poor performance, faster wear and tear during pigging, and higher cost for long-distance pigging

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