Small diameter metal pipe long-range lining glass reinforced plastic hose repairing method

A technology of metal pipes and glass fiber reinforced plastics, applied in the direction of pipes/pipe joints/fittings, pipe components, mechanical equipment, etc., can solve the problems of reducing infusion volume, small channel area, and reducing the area of ​​original pipeline channels, so as to save repair costs, The effect of reducing technical difficulty and simplifying the on-site repair process

CN101105256AActive Publication Date: 2008-01-16DAQING PETROLEUM ADMINISTRATION +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2008-01-16

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Abstract

The invention discloses a method for repairing metal pipeline with small aperture and long distance using soft pipe interlined with glass fiber reinforced plastic. The method comprises prefabricating soft pipe (4) interlined with glass fiber reinforced plastic composed of a soft pipe blank (1), an adhesive layer (2) and a soft rubber pipe (3), introducing the soft pipe (4) interlined with glass fiber reinforced plastic into a metal pipeline to be repaired, tightening the two ends of the soft pipe (4) interlined with glass fiber reinforced plastic, and introducing steam, the adhesive layer (2) on the soft rubber pipe (3) melts under certain temperature and pressure and penetrates into the soft pipe blank (1) to adhere with the inner wall of the metal pipeline, and the adhesive layer (2) becomes hardened with the dropping of temperature and pressure inside the pipe to form glass fiber reinforced plastic lining. The length of the prefabricated soft pipe (4) interlined with glass fiber reinforced plastic can be randomly adjusted, then the soft pipe needs no to be turned over during operation, so as to repair the pipeline with small aperture and long distance. In addition, the method has the advantages of simple process and easy operation, and is an effective method to repair the old pipeline with small aperture.
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Description

Technical field:

[0001] The invention belongs to a method for overhauling pipelines in ground engineering, in particular to a method for repairing small-diameter and long-distance metal pipelines by using a glass-steel-lined hose method. Background technique:

[0002] At present, the repair methods of old steel pipelines in use in oilfields mainly include: interspersed with polyethylene (PE) plastic pipes, squeezed cement mortar, epoxy cement, flipped glass fiber reinforced plastics or stainless steel linings, etc. These methods are generally applicable to the repair of medium and large-diameter steel pipes above φ159mm, and the length of a repair generally does not exceed 300m.

[0003] As for the small-diameter old pipelines below φ114mm, even if the most suitable flip-lined fiberglass hose method is used, the length of one repair is only 100m. There are two main reasons for the short primary lining distance of small-diameter pipes. One is that the area of ​​the channel ...

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] As shown in Figure 1, the FRP hose 4 is composed of a hose blank 1, an adhesive layer 2, and a soft rubber hose 3, wherein the hose blank 1 is tubular and seamless, and the material is chemical fiber or inorganic fiber, such as polyester fiber, polypropylene fiber, polyester fiber, acrylic fiber, spandex fiber or glass fiber, or a combination of several fibers; of course, it is not limited to the aforementioned fibers, as long as the fiber has a certain strength and is suitable for weaving, It can be resistant to liquid corrosion in pipelines such as crude oil and sewage. Wherein the polyester fiber is preferably a thermoplastic saturated polyester fiber, which can be obtained by injection molding of a thermoplastic saturated polyester resin through a spinneret, because the resin has the characteristics of high mechanical strength, good corrosion resistance to crude ...