Production method for rubber-plastic subsea pipeline and connection structure for same

Abstract

The invention provides a production method for a rubber-plastic subsea pipeline which is simple in structure and has a good use effect, and a connection structure for the subsea pipeline. The production method comprises the steps of producing a metal-glass fibre reinforced plastic composite tube at first, and then inserting a rubber-plastic tube in the metal tube to form a three-layer composite tube. The connection structure mainly comprises a lining rubber-plastic tube (1), a glass fibre reinforced plastic layer (2), a metal tube end external thread (3), a travelling buckle internal thread sleeve (4), an inner-layer rubber-plastic boss (5), annular sawteeth (6) and a metal tube end annular boss (7). The connection structure provided by the invention is reasonable and practical in design, metal-glass fibre reinforced plastic lining rubber-plastic subsea pipelines can be easily and simply butted, and the problems of corrosion and abrasion of the subsea pipelines are avoided, the properties of water resistance, heat insulation, rapid construction, rapid repair, external force damage prevention and the like of the subsea pipelines are achieved, and thus the running cycle of the pipelines is prolonged to 50 years.

Description

technical field [0001] The invention relates to the technical field of manufacturing rubber-plastic submarine pipelines, in particular to a manufacturing method and connection structure of rubber-plastic submarine pipelines. Background technique [0002] At present, the development of offshore oil and gas fields has begun to take shape. Traditional submarine pipelines are mostly thick-walled seamless steel pipes coated with an anti-corrosion layer, and polyurethane foam insulation is added. This kind of submarine pipeline not only has high cost, poor pressure bearing capacity, and difficult construction, but also is extremely inconvenient to maintain, which has caused great difficulties to pipeline construction and maintenance. In the prior art, the published documents that can solve the above problems include the following: Patent Nos. 50075013071, 500750017449, 500750017450, 500950020636, the polyethylene glass fiber resin-impregnated composite pipe and connector described...

AI Technical Summary

Problems solved by technology

[0004] Not to mention that the manufacturing method of the metal fiberglass-steel-lined rubber-plastic submarine pipeline and the connection structure with the metal pipe are not suitable for offshore construction. There will be thermal expansion and contraction between the rubber-plastic pipe and the middle layer of steel pipe, which will cause the accumulation of delamination of the pipe, and the stress cannot be relieved between each connecting pipe; the more important problem that needs to be solved now is that the three-layer metal FRP inner The connection between the rubber-plastic-lined submarine pipeline and the metal pipe is necessary, so it is necessary to develop the manufacturing method of the rubber-plastic-lined submarine pipeline and the connection structure technology with the metal pipe. Connection method between rubber-plastic lined submarine pipeline and metal pipe

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