Lining pipe joint of marine oil pipeline

A technology for oil pipelines and lined pipes, which is applied in the direction of pipes/pipe joints/fittings, pipeline protection, hose connection devices, etc., and can solve problems such as poor mechanical strength

Inactive Publication Date: 2012-08-01
HANGZHOU OPR OFFSHORE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor mechanical strength of the line

Method used

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  • Lining pipe joint of marine oil pipeline
  • Lining pipe joint of marine oil pipeline
  • Lining pipe joint of marine oil pipeline

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Embodiment 1: In this embodiment, the lined pipe joint of the ocean oil pipeline includes a flange 1, an inner sleeve 2, an outer sleeve 3 and a plurality of jacking screws 4, and the inner sleeve 2 is arranged inside the outer sleeve 3 and The inner sleeve 2 is coaxial with the outer sleeve 3, the flange 1 is fixed to one end of the inner sleeve 2 and the outer sleeve 3 and is coaxial with the two, and the outer surface of the inner sleeve 2 is provided with an annular concave hole. Groove 2-1, the outer sleeve 3 is evenly opened with a plurality of threaded holes along the circumferential direction, each top wire 4 is screwed in a threaded hole and the front end of the top wire 4 extends into the inner surface of the outer sleeve 3, the top The groove 2-1 on the outer surface of the inner sleeve 2 is pushed against the wire 4 .

[0011] Beneficial effects of the present invention: Since the present invention uses top wires instead of metal rings and throat hoops to fi...

specific Embodiment approach 2

[0012] Specific embodiment two: the difference between this embodiment and specific embodiment one is that a connecting sleeve 5 is added between the inner sleeve 2 and the outer sleeve 3, and the connecting sleeve 5 is fixed on the outer sleeve 3, and the top wire The front end of 4 is pressed against the outer surface of the connecting sleeve 5, and the inner surface of the connecting sleeve 5 deformed under pressure fills the groove 2-1. Other structures and connections are the same as in the first embodiment.

[0013] This structure can effectively avoid the stress concentration on the surface of the liner pipe caused by the long-term top pressure of the top wire. The result of stress concentration will cause local damage to the liner pipe and affect the normal operation of marine oil transportation.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment two is that: the two ends of the connecting sleeve 5 are fixed on the outer sleeve 3 by welding, and the outer circular surface of the connecting sleeve 5 is connected to the outer sleeve 3. A cavity is formed between the surfaces of the inner holes, and two annular sealing grooves 2-2 are formed on the outer surface of the inner sleeve 2, and the cavity between the connecting sleeve 5 and the outer sleeve 3 is filled with rings. Oxygen resin, injection of epoxy resin and exhaust are realized through two threaded holes corresponding to the top wire 4, and a sealing ring 2-3 made of nitrile rubber is placed in the sealing groove 2-2. Other structures and connections are the same as in the second embodiment.

[0015] In this structure, the epoxy resin also plays the role of crimping, and its mechanical properties are very good. During the cooling process, the solidification shrinkag...

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PUM

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Abstract

The invention discloses a lining pipe joint of a marine oil pipeline to solve the problem of low mechanical strength of the conventional lining pipe joint. The lining pipe joint comprises a flange (1), an inner sleeve (2), an outer sleeve (3) and a plurality of jackscrews (4), wherein the inner sleeve (2) is arranged in the outer sleeve (3) and is coaxial with the outer sleeve (3); the flange (1) is fixed with one end of the inner sleeve (2) and one end of the outer sleeve (3) and is coaxial with the inner sleeve (2) and the outer sleeve (3); the outer surface of the inner sleeve (2) is provided with an annular groove (2-1); a plurality of threaded holes are uniformly formed in the outer sleeve (3) along the circumferential direction; and each jackscrew (4) is screwed in a threaded hole, and the front end of each jackscrew (4) extends into the inner surface of the outer sleeve (3) and jacks the groove (2-1) on the outer surface of the inner sleeve (2). The lining pipe joint can be applied to connection of hoses with various diameters.

Description

technical field [0001] The invention relates to a lining pipe joint of an ocean oil pipeline. Background technique [0002] In the process of offshore oil transportation, the corrosion of carbon steel pipes has been a problem that has plagued many years. Corrosion is multifaceted, including internal corrosion and external corrosion, and external corrosion includes seawater corrosion, soil corrosion and biological (bacterial) corrosion. At present, the corrosion of submarine pipelines is mainly controlled by the reasonable selection of materials in the design stage, the application of cathodic protection, and the internal coating technology of some pipelines; for the pipelines that have been in operation, the main method of corrosion control is limited to corrosion inhibition Corrosion control methods are very limited. The design and development of IFL is an effective way to solve this problem. The so-called IFL (InfieldLiner) is to line a layer of hose inside the carbon s...

Claims

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Application Information

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IPC IPC(8): F16L33/22F16L33/28F16L58/00
Inventor 程友祥刘恩华
Owner HANGZHOU OPR OFFSHORE ENG CO LTD
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