Sealing and heat insulating device for wrapped insulated tubing and manufacturing method thereof

Abstract

The invention relates to a sealing and heat insulating device for a wrapped insulated tubing and a manufacturing method thereof. Sealing hoops are installed at the two ends of an anti-corrosion protecting layer located on the middle section of the tubing, in other words, the tubing is sleeved with buna-N silicon seals. The anti-corrosion protecting layer is arranged outside the buna-N silicon seals in an extending and wrapping mode, and stainless steel rings are arranged to achieve binding and forceful sealing between the anti-corrosion protecting layer and the buna-N silicon seals and the tubing. Multiple stainless steel hooping pipe clamps are arranged on the upper portion, the middle portion and the lower portion of the outer wall of a semicircular insulated protecting pipe sleeve, and a longitudinal sealing bar is arranged at the position of a butt joint of the semicircular insulated protecting pipe sleeve. The semicircular insulated protecting pipe sleeve is of a structure that buna-N materials are arranged on the periphery and aerogel insulation felt is clamped in the middle. No oil-gas-water substance can enter the space between the insulation layer and the tubing and the space between the insulation layer and the protecting layer, so that the heat insulation effect of the whole wrapped insulated tubing is better and oil exploitation cost is reduced greatly.

Description

technical field [0001] The invention relates to an outer-wrapped heat-insulated oil pipe suitable for an oil production string in an oil field, and more particularly relates to an outer-wrapped heat-insulated oil pipe sealing and heat-insulating device and a preparation method thereof. Background technique [0002] At present, in the actual production process of oil fields, pure bare pipe (without any heat insulation measures) is generally used for production. This oil production method has the problem of a large loss of crude oil temperature in the wellbore, which makes the crude oil in the wellbore poor in fluidity. , When the heat preservation in the wellbore is not good, when the temperature of the crude oil is low, wax is easy to form in the oil pipe. Moreover, the load of the pumping unit is increased, which wastes electric energy and the thermal energy of the heating furnace of the ground gathering and transportation system. [0003] Wrapping heat-insulated oil pipes...

AI Technical Summary

Problems solved by technology

According to the published patent of the outer-wrapped heat-insulated oil pipe, it is known that the existing sealing structure of the outer-wrapped heat-insulated oil pipe still has the problem of oil and gas leakage. The material and structure of the shape heat insulation protection sleeve are not ideal, which affects the heat insulation effect

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