Efficient thermal insulation heating oil pipe suitable for heavy oil exploitation

Abstract

The invention discloses an efficient thermal insulation heating oil pipe suitable for heavy oil exploitation. The efficient thermal insulation heating oil pipe comprises an oil pipe body. The oil pipebody is internally provided with a high wear-resistant inner lining, a polymer nano-thermal insulation layer is arranged between the oil pipe body and the high wear-resistant inner lining, and a self-healing type PTC self-limited temperature electrothermal film is arranged between the polymer nano-thermal insulation layer and the high wear-resistant inner lining. A feeder bus-bar is further arranged between the polymer nano-thermal insulation layer and the high wear-resistant lining in a laid mode, concentric conductive rings are arranged at the two ends of the oil pipe body, and the concentric conducting rings are arranged at the ends of the oil pipe body and the high wear-resistant inner lining. According to the efficient thermal insulation heating oil pipe suitable for heavy oil exploitation, the high wear-resistant inner lining is arranged inside the oil pipe body, the polymer nano-thermal insulation layer is arranged between the oil pipe body and the high wear-resistant inner lining, and the high wear-resistant inner lining can bear the pressure of crude oil in an oil well and further protect the polymer nano-thermal insulation layer from being worn; and a heat preservation method is adopted to ensure constant temperature lifting of the crude oil, the plug removing heating element self-restoring PTC electrothermal film is designed inside the insulation layer, and the zeropollution, zero emission, maintenance-free and low energy consumption effects are truly achieved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation equipment, and more specifically relates to a high-efficiency thermal insulation and heating oil pipe suitable for heavy oil exploitation. Background technique [0002] With the large-scale exploitation of international oil, the oil reserves are getting less and less. In order to cope with the shortage of oil reserves, all major oil fields have carried out secondary oil recovery or even tertiary oil recovery to varying degrees. The three highs (high Condensate, high-viscosity, high-waxy) crude oil, especially ultra-high-heavy heavy oil, has also done everything possible to carry out large-scale exploitation. The main techniques of heavy oil production in the past include steam huff and puff, hot oil blending, chemical viscosity reduction, electric heating, etc., but these methods have various deficiencies in their use. [0003] In the process of crude oil extraction, due to the hea...

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Problems solved by technology

However, when the well is shut down for a long time such as power failure, well shutdown, equipment maintenance, etc., the crude oil will still be waxed and solidified in the wellbore

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