A heat-insulating intelligent anti-corrosion tubing for high-sulfur natural gas wells

Abstract

The invention discloses a heat preservation and intelligent anticorrosion oil pipe for a high sulfur natural gas well. The heat preservation and intelligent anticorrosion oil pipe is composed of six layers which are an inner anticorrosion anti-drag layer (6), an inner intelligent anticorrosion layer (5), a heat preservation layer (4), a supporting layer (3), an outer intelligent anticorrosion layer (2) and an outer anticorrosion anti-drag layer (1) in sequence; the inner intelligent anticorrosion layer (5) is wrapped outside the inner anticorrosion anti-drag layer (6); the heat preservation layer (4) is wrapped outside the inner intelligent anticorrosion layer (5); the supporting layer (3) is wrapped outside the heat preservation layer (4); the outer intelligent anticorrosion layer (2) is wrapped outside the supporting layer (3); the outer anticorrosion anti-drag layer (1) is wrapped outside the outer intelligent anticorrosion layer (2). The heat preservation and intelligent anticorrosion oil pipe has the beneficial effects that the oil pipe has excellent thermal stability and non-corrosibility; each functional layer has the capacities of compression resistance, heat preservation, intelligent anticorrosion, drag reduction and attaching prevention respectively; the coefficients of thermal expansion of the functional layers are the same; the problem that heat preservation and anticorrosion materials for conventional heat preservation and anticorrosion tubular products are easy to fall off is solved.

Description

technical field [0001] The invention relates to the technical field of oil pipes used in oil and natural gas development, in particular to an intelligent heat-preserving anti-corrosion oil pipe used for high-sulfur natural gas wells. Background technique [0002] Commonly used thermal insulation pipes generally use steel pipes as supporting materials, and thermal insulation materials are added to the inner and outer walls of the steel pipes, such as a tripolymer composite thermal insulation pipe disclosed in Chinese patent 200910093535.7, an enamel thermal insulation pipe disclosed in Chinese patent 201110213942.4, and a thermal insulation pipe disclosed in Chinese patent 201210300245.7. A composite thermal insulation pipe and a thermal insulation pipe disclosed in Chinese patent 201210526371.4. Because the thermal expansion coefficients of the steel pipe and the insulation material are different, the insulation material falls off in the case of drastic temperature changes i...

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