Anticorrosion wear-resistant coated heat-insulation oil pipe

Abstract

The invention discloses an anticorrosion wear-resistant coated heat-insulation oil pipe composed of an oil pipe body, an anticorrosion wear-resistant layer inside the oil-pipe body, a heat insulation layer outside the oil pipe body, and an anticorrosion protecting layer outside the heat insulation layer. An inner pipe is fixedly nested in the oil pipe body, an outer heat insulation layer uniformly wraps the outer wall of the middle section of the oil pipe body, and an outer anticorrosion protecting layer wraps the outer wall of the heat insulation layer. Another heat insulation layer wraps a connecting hoop and an upper operating section and a lower operating section which are connected with the connecting hoop of the oil pipe body, and a heat-insulation layer protecting steel casing is mounted outside the referred heat insulation layer. By the anticorrosion wear-resistant coated heat-insulation oil pipe, loss of own temperature of crude oil when flowing from a well bottom to a wellhead is effectively reduced, and flow state of the crude oil in a wellhole is improved. The problems about an eccentric wear of rod pipes of the oil pipe, corrosion resistance inside the oil pipe, scaling, wax precipitation, corrosion resistance outside the oil pipe are solved, friction resistance among the rod pipes of a rod pumped well is reduced, finally, energy is saved, emission is reduced, damages to the rod pipes are reduced, downhole operation load is reduced, and exploration cost of oil is greatly reduced.

Description

Technical field

[0001] The invention relates to a wear-resistant, anti-corrosion, and heat-insulating tubing with an outer coating suitable for oil production tubing strings in oil fields. Background technique

[0002] At present, in the actual production process of oilfields, pure polished pipes (without any heat insulation measures) are generally used for production. This oil production method has the problem of a large loss of the temperature of the crude oil; The anti-corrosion coating is applied to the surface of the pipe. Because the rust in the tubing is not easy to clean and the coating is thin, the anti-corrosion layer is easy to fall off and the service life is short; it is generally used to solve the eccentric wear of the rod and tube of the pumping unit. Glass lining, anti-eccentric wear wellhead and other technologies, these technologies have problems such as easy breakage of glass lining, large workload for anti-eccentric wear wellhead operation and poor anti-eccent...

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