A method for manufacturing and installing steel-plastic composite pipelines for oilfield gathering and transportation

A steel-plastic composite pipe and steel-plastic composite technology, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of fluid leakage, steel-plastic composite pipe strength and anti-corrosion weakening, and achieve pipeline installation Convenience, reduced gathering and transportation maintenance, and improved service life

Inactive Publication Date: 2017-02-15
CHANGCHUN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The connection method of the above-mentioned steel-plastic composite pipe is mostly flange connection or flange connection with adhesive, and this sealing combination is the weak part of the steel-plastic composite pipe, which greatly improves the strength and anti-corrosion effect of the steel-plastic composite pipe. Weakened, especially under the condition of high temperature and high pressure fluid, it is easy to cause fluid leakage at the nozzle seal connection between steel-plastic composite pipes

Method used

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  • A method for manufacturing and installing steel-plastic composite pipelines for oilfield gathering and transportation
  • A method for manufacturing and installing steel-plastic composite pipelines for oilfield gathering and transportation
  • A method for manufacturing and installing steel-plastic composite pipelines for oilfield gathering and transportation

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Embodiment

[0044] Selection of materials: ⑴Select seamless steel pipes with outer diameter φ114mm, inner diameter φ97mm (wall thickness 8.5mm), length 9500mm, and pipe fittings such as tee and elbow with the same inner diameter, including those with flanges and collars for welding connection. For seamless steel pipes, the mouths of tees and elbows are prefabricated with flanges or collars for welding connection; ⑵The plastic pipe is made of high-density polyethylene (HDPE) with an outer diameter of φ102, which is about 5% larger than the inner diameter of the steel pipe, and the wall thickness is 9mm; ⑶ Steel pipe clamps are seamless steel pipes with outer diameter φ133mm, inner diameter φ121mm (wall thickness 6mm), and length 320mm; ⑷ epoxy resin adhesive, etc.

[0045] step

[0046] 1) Preparation of steel-plastic composite pipe: reference figure 1 The high-density polyethylene pipe 1 with a length of 9560mm is heated to 45°C for 10 minutes and then reduced to an outer diameter of 95mm (abo...

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Abstract

The invention provides a manufacturing and mounting method of a steel-plastic composite pipeline for gathering and transportation in an oil field. According to the method, steel-plastic composite pipes are prepared firstly, and then plastic pipes of the steel-plastic composite pipes are connected with steel pipes after subjected to fusion welding connection during mounting of the pipeline, so that the whole pipeline does not have seams or weak parts; the lining plastic pipes are firmly combined with the steel pipes, the strength function, the corrosion-resistant function and the non-leakage sealing function of the steel-plastic composite pipes can be fully performed during gathering and transporting of fluids, the high-temperature, high-pressure and high-corrosion fluids can be conveyed for a long distance safely and reliably, maintenance of the steel-plastic composite pipeline for gathering and transportation can be reduced, the gathering and transportation efficiency is improved, and the service life of the pipeline is remarkably prolonged.

Description

Technical field [0001] The invention relates to a method for manufacturing and installing a gathering and transportation pipeline, and is a method for manufacturing and installing a steel-plastic composite pipeline. Background technique [0002] The plastic-lined steel-plastic composite pipeline has the advantages of high corrosion resistance, high load-bearing capacity, low fluid resistance, safety and health, and long service life. It has been widely used in various gathering and transportation fields such as oil and gas fields. The important key technology for the application of steel-plastic composite pipes is how to make use of the performance of steel-plastic combination, not only to ensure sufficient strength, but also to ensure reliable corrosion resistance, especially for steel-plastic composite pipes that transport high temperature and high pressure fluid media. The firm combination of lining plastic and steel pipe and the sealing technology of the pipe mouth are partic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/147
CPCF16L9/147
Inventor 杨悦王淮赵国良
Owner CHANGCHUN UNIV OF TECH
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