Method for crossed crossing construction of composite hose

A composite hose and cross-over technology, which is applied in the field of submarine composite hose cross-over, can solve problems such as difficulty, large sea workload, and large operating costs.

Active Publication Date: 2015-12-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Claims
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Problems solved by technology

From the above analysis, we can see that the conventional subsea pipeline crossing treatment method has the following main disadvantages: (1) It is necessary to mobilize the operating ship to pre-treat the crossing point before laying the new pipeline, resulting in huge operating costs; (2) ) Since each concrete briquette needs to be hoisted and installed separately, the hoisting of a

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  • Method for crossed crossing construction of composite hose
  • Method for crossed crossing construction of composite hose
  • Method for crossed crossing construction of composite hose

Examples

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Embodiment 1

[0029] A composite hose cross-spanning construction method described in the embodiment of the present application includes the following steps:

[0030] S1. Accurately measure and determine the binding position of the grouting airbag 2;

[0031] S2. Recover the composite hose 1 and bind the grouting airbag 2 at a suitable position;

[0032] S3. The composite hose 1 is put in place again to carry out the grouting operation and complete the composite hose crossover process.

[0033] Wherein, in this embodiment, the determination method of the step S1 is as follows:

[0034] During the laying of the composite hose 1, according to the water depth of the operating sea area, when the mud entry point of the composite hose 1 is about 100-300m away from the crossing point, draw a line on the hose body at a distance of 0.5m, and the length of the line is 150m. , Continue to lower the composite hose 1 When it crosses the original submarine pipeline for about 20-30 meters, stop the layi...

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Abstract

The invention provides a method for crossed crossing construction of a composite hose. The method comprises a step S1 of accurately measuring the binding position of a grouting air bag; a step S2 of recycling the composite hose and binding the grouting air bag at the appropriate position; and a step S3 of placing the composite hose in position again to perform grouting operation and finishing crossed crossing treatment of the composite hose. The method has the advantages that by adopting the method, crossed crossing treatment can be performed in the composite hose laying process, the conventional requirement for pretreatment on crossed crossing points through an operation ship prior to the laying of a new pipe is omitted, and the method not only reduces massive offshore working amount and reduces operation cost, but also greatly reduces operation safety risk.

Description

technical field [0001] The invention relates to the technical field of cross-spanning of submarine composite hoses, in particular to a construction method for cross-spanning of composite hoses. Background technique [0002] With the advancement of technology, offshore oil and gas fields have been further developed, and there are more and more offshore oil platforms, followed by criss-crossing submarine pipelines. When two sea pipes cross and span, the newly laid sea pipe will generate additional pressure on the original sea pipe, and at the same time, the newly laid sea pipe will also be suspended. It brings great safety hazards. In order to ensure the safe operation of offshore oil and gas pipelines, the original pipelines need to be protected when the newly laid submarine pipelines cross the original submarine pipelines according to the specifications. [0003] At present, the conventional method for crossing submarine pipelines is to lay concrete briquettes above the ori...

Claims

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Application Information

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IPC IPC(8): F16L1/16F16L1/235
CPCF16L1/16F16L1/166F16L1/235
Inventor 汪建明周声结陈大江李天斌梁旭李树楠戚蒿符秀全汤乾宇刘立辉马东山
Owner CHINA NAT OFFSHORE OIL CORP
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