Shandong Huaning Electric Heating Technology Co., Ltd.
Method of laying and construction of electric heating of buried oilfield pipeline
Due to their specificity, oilfield pipelines must be very careful when choosing isolation measures. In addition to overhead oil pipelines, there are also underground pipelines, and, as a rule, electric heating systems are more often used.
Feb 09,2023
In recent years, the global demand for oil and gas energy has been increasing and the oil and gas transportation system is the key to connecting production and end points of consumption Because of its safety and economy, pipelines are considered the first choice. For long-distance transportation of oil and gas. Due to their specificity, oilfield pipelines must be very careful when choosing isolation measures. In addition to overhead oil pipelines, there are also underground pipelines, and, as a rule, electric heating systems are more often used.
At present, the design of the winding and laying of electric heating cables for overhead pipelines is very mature. Pipelines requiring electric heating can be laid according to the requirements of the electric heating installation before the construction of insulating materials. Methods for laying and constructing electric heating of underground pipelines require special design.
It should be considered to install underground electric heating cables in oil fields, because: the underground insulation layer has a good thermal insulation effect; the outer protective layer of the underground insulation layer should have good waterproof performance; the connecting box of the electric heating cable should be installed on the ground.
Consider the insulating effect of the insulating layer and the waterproof effect of the outer protective layer. The roll on the foam insulation layer must be pre-manufactured in the factory. Given the limitations of the transport and production lines, the insulation layer length cannot be the same length as the pipe, which excludes the possibility of winding the electric heating cable before assembly, which will increase the distance between the pipes in the section.
The design process tentatively uses the way long electric heating cables, and the space for electric heating through the pipes is reserved outside the piping that needs to be insulated. Pipe), temporarily fix it with galvanized iron wire, etc. P., and then fill the space between the outer protective pipe and the working steel pipe with rigid polyurethane foam, and after making an advance payment, transport to the site. The insulation layer is aligned with the threaded pipes of the heating cables, and the electric heating cables are routed through the reserved pipes through the pipes, and the head and tail junction boxes are installed at both ends of the inlet and outlet ground.
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