Pure anti-wax oil pipe unit, pure anti-wax oil pipe and manufacturing method of pure anti-wax oil pipe unit

Abstract

The invention relates to a pure anti-wax oil pipe unit, a pure anti-wax oil pipe and a manufacturing method of the pure anti-wax oil pipe unit. The pure anti-wax oil pipe unit comprises an oil pipe body and an inner pipe located in the oil pipe body. A gap between the oil pipe body and the inner pipe is filled with heat-preservation insulating materials. A conductive pipe section of the oil pipe is formed by a plurality of oil pipe units which are connected in sequence through couplings. Insulating metal gaskets are arranged in the couplings. Each insulating metal gasket is composed of a conductive inner ring and an insulating outer ring which are integrated together. Electrical connection of the oil pipe bodies and electrical connection of the inner pipes are realized through the insulating metal gaskets. The manufacturing method comprises the steps that the inner pipe, a first sealing flange and the oil pipe body are assembled into a whole, the heat-preservation insulating materialsare injected into the gap between the inner pipe and the oil pipe body, and a second sealing flange is embedded after solidification. According to the pure anti-wax oil pipe, crude oil in the oil pipecan be electrically heated, and the oil pipe is suitable for extracting thickened oil.

Description

technical field [0001] The invention relates to a wax-removing and preventing oil pipe unit (unit pipe), a wax-removing and preventing oil pipe composed of the oil pipe unit and a preparation method of the oil pipe unit, belonging to the field of petroleum exploitation equipment. Background technique [0002] With the massive exploitation of international oil, the oil reserves are getting less and less. In order to cope with the shortage of oil reserves, the major oil fields have carried out secondary oil recovery or even tertiary oil recovery to varying degrees. Three-high (high pouring, high viscosity, high waxy) crude oil, especially ultra-high heavy oil, which was not valued by oil people before, is also doing everything possible to carry out large-scale exploitation. Traditional heavy oil production techniques mainly include steam huff and puff, hot oil blending, chemical viscosity reduction, electric heating, etc., all of which consume energy (electric energy, natural ...

AI Technical Summary

Problems solved by technology

The traditional thermal insulation oil pipe is a prestressed vacuum insulation oil pipe, which is complicated in process, bulky and expensive, and the inner diameter of the 89 heat insulation oil pipe is only 40mm, and the diameter of the smallest Φ19 sucker rod coupling is 41.3mm, which is affected by the sucker rod. Limitations, the traditional thermal insulation tubing cannot be used in heavy oil production operations and wax removal, it can only be used for steam injection in oil wells

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