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Submarine pipeline buckling preventing device, and manufacturing method and mounting method thereof

A technology of submarine pipelines and manufacturing methods, applied in pipeline laying and maintenance, pipeline supports, pipes/pipe joints/pipe fittings, etc., to achieve the effects of simple processing technology, good pressure resistance, and stability

Active Publication Date: 2011-04-20
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no device that combines control of pipeline buckling and enhancement of pipeline in-situ stability

Method used

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  • Submarine pipeline buckling preventing device, and manufacturing method and mounting method thereof
  • Submarine pipeline buckling preventing device, and manufacturing method and mounting method thereof
  • Submarine pipeline buckling preventing device, and manufacturing method and mounting method thereof

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 , figure 2 As shown, the present invention includes thick-walled shells 2, 3 that can be stuck on the outer wall of the submarine pipeline 1 from the top and bottom, and the two sections are ring-shaped thick-walled shells 2, 3. The upper and lower housings 2, 3 can be connected as a whole through the mounting holes and bolts 5 provided on the eye plate 4. The upper and lower casings 2 and 3 can be made of the same material as the submarine pipeline 1, for example: APLX65 or X70, X80 grade steel. Both shells 2 and 3 are poured with concrete briquettes 6 with a horseshoe-shaped cross-section. Two vertical anchor plates 7 and two oblique anchor plates 8 are welded symmetrically on both sides of the lower shell 3. Each anchor plate 7, The axial width of 8 along the lower shell 3 is the same as the axial width of the concrete b...

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Abstract

The invention relates to a submarine pipeline buckling preventing device, and a manufacturing method and a mounting method thereof. The device comprises two annular thick-wall shells, wherein the two sides of each shell are symmetrically extended to form an elongated eye plate respectively. The two shells are integrated by bolts. Concrete pressure blocks with horseshoe-shaped sections are poured outside the shells in the eye plates on the two sides. Two vertical anchor plates and two oblique anchor plates are symmetrically welded on the two sides of each shell along the length directions of the concrete pressure blocks. The upper parts of all the anchor plates are poured in the concrete pressure blocks. The device provided by the invention can be applied to unburied submarine pipelines arranged at seat bottom and greatly reduces the ditching and pipeline burying cost. The device, and the manufacturing method and the mounting method thereof effectively control the buckle propagation of the submarine pipelines, enhance the positioning stability of the submarine pipelines, and realize the uniformity of economy and safety.

Description

technical field [0001] The invention relates to a reinforcing and stabilizing device for a submarine pipeline and a method for making and installing the same, in particular to a device for preventing buckling of a submarine pipeline and enhancing the in-situ stability of the submarine pipeline and a method for making and installing the same. Background technique [0002] In actual engineering, the environment of submarine pipelines, especially deep-water submarine pipelines, is extremely complex. Submarine pipelines, especially deep-water submarine pipelines, also bear huge hydrostatic pressure (the hydrostatic pressure reaches 10Mpa at a water depth of 1000 meters) or encountered during the laying process. Some obstacles cause excessive bending deformation of the pipeline, and the axial force generated by the thermal expansion of the hot oil pipeline due to the temperature difference between the inside and outside, etc. These reasons are easy to cause local buckling of the ...

Claims

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Application Information

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IPC IPC(8): F16L3/10F16L3/26F16L1/16
Inventor 曹静卞雪航张恩勇余建星沙勇余杨付明炀周清基
Owner CHINA NAT OFFSHORE OIL CORP
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