Wax-removing and preventing oil pipe unit, wax-removing and preventing oil pipe and preparation method of wax-removing and preventing oil pipe unit

Abstract

The invention relates to a wax-removing and preventing oil pipe unit, a wax-removing and preventing oil pipe and a preparation method of a wax-removing and preventing oil pipe unit. The oil pipe unit includes an oil pipe body and an inner pipe located in the oil pipe body, and the gap between the oil pipe body and the inner pipe is filled with thermal insulation material. The conductive pipe section of the oil pipe is formed by connecting several above-mentioned oil pipe units sequentially through couplings, and an insulating metal gasket is provided inside the coupling, and the insulating metal gasket is composed of a conductive inner ring and an insulating outer ring integrated into one body. The insulating metal gasket realizes the electrical connection between the oil pipe bodies and the electrical connection between the inner pipes. The preparation method is to assemble the inner pipe, the first sealing flange and the oil pipe body into one body, inject molten insulation and heat preservation material into the gap between the inner pipe and the oil pipe body, and then embed the second sealing flange after solidification. This oil pipe can electrically heat the crude oil in the oil pipe, and is suitable for pumping heavy 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 ...

Examples

Embodiment Construction

[0070] see figure 1 and figure 2 , the wax-removing oil pipe unit of the present invention comprises oil pipe body 1, and described oil pipe body can be common oil pipe, and the inner pipe 2 coaxial with it is arranged in described oil pipe body, leaves between described oil pipe body and described inner pipe. There is a gap, and the gap is filled with thermal insulation material, and the thermal insulation material fills the gap to form a thermal insulation layer 3, and the inner wall of the inner pipe is sprayed with an anti-wear insulating material to form an anti-wear insulating layer 4 , the outer walls of both ends of the oil pipe body are provided with external threads, and are screwed with collars 5 to realize the connection between the two oil pipe units.

[0071] One or more centralizers (not shown) are set on the inner pipe. The centralizer can adopt the existing technology, which is ring-shaped, and several support points extend radially from the periphery, and a...

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 ...

Examples

Embodiment Construction

[0070] see figure 1 and figure 2 , the wax-removing oil pipe unit of the present invention comprises oil pipe body 1, and described oil pipe body can be common oil pipe, and the inner pipe 2 coaxial with it is arranged in described oil pipe body, leaves between described oil pipe body and described inner pipe. There is a gap, and the gap is filled with thermal insulation material, and the thermal insulation material fills the gap to form a thermal insulation layer 3, and the inner wall of the inner pipe is sprayed with an anti-wear insulating material to form an anti-wear insulating layer 4 , the outer walls of both ends of the oil pipe body are provided with external threads, and are screwed with collars 5 to realize the connection between the two oil pipe units.

[0071] One or more centralizers (not shown) are set on the inner pipe. The centralizer can adopt the existing technology, which is ring-shaped, and several support points extend radially from the periphery, and a...

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