Crossing protector for submarine pipeline

Abstract

A crossing protector for a submarine pipeline comprises round tubes, supports, sinking-proof plates, limit fasteners, pipe clamps, rubber pads, and seal plates. The crossing protector is bilateral symmetry. Two round tubes are located right above an original pipeline. Each round tube is covered with one rubber pad, and the round tubes are connected through the supports. Other two round tubes are located below the two top round tubes respectively and are connected through the supports respectively. An area of each bottom outer round tube, which contacts with a newly laid pipeline, is covered with one rubber pad. The bottom of each bottom outer round tube is level to that of the corresponding bottom inner round tube, and the bottom outer round tube is connected with the bottom inner round tube through the I-steel bottom support, and one sinking-proof plate is disposed at the bottoms of the bottom outer round tube and the bottom inner round tube. The crossing protector does not contact with the original pipeline, so that gravity of the crossing protector and gravity of the newly laid pipeline cannot be transferred to the original pipeline, the original pipeline is protected to the maximum extent, and risks in construction and production are also avoided. In addition, the crossing protector can be mounted by single lifting, so that offshore construction amount and construction cost are reduced greatly.

Description

technical field [0001] The invention relates to a subsea pipeline spanning protection device. Background technique [0002] According to the requirements of the code, when the newly laid submarine pipeline crosses the existing submarine pipeline, the original pipeline needs to be protected. At present, the conventional treatment method is to place concrete briquettes above it along the direction of the original pipeline or concrete pads on both sides, and then fill sandbags to form a transitional gentle slope, and then lay a new pipeline above it, thus, that is Realize the protection treatment of the original pipeline. However, since the gravity of the concrete briquette will be transmitted to the original pipeline through the soil, especially for the exposed pipeline, the gravity of the concrete briquette will directly act on it, which will bring risks to the safe operation of the original pipeline. [0003] This is especially true for the spanning protection construction...

AI Technical Summary

Problems solved by technology

[0003] This is especially true for the spanning protection construction of subsea pipelines in oil and gas fields where production cannot be stopped. If the construction is not properly controlled, it will cause serious consequences such as pipeline leakage or explosion.

At the same time, because there is a certain deviation between the actual route of the newly laid pipeline and the designed route, the actual crossing point of the two pipelines is also uncertain, but the basic treatment of the crossing point must be completed before the laying of the new pipeline starts. Therefore, in order to ensure that the new Pipe laying is done on the foundation that has been treated, and the scope of foundation treatment must be large to meet the requirements. Generally, dozens of briquetting blocks are required for a crossing point, especially in deep water conditions. The processing range is larger, and the number of briquettes required is larger. Since each concrete briquette needs to be hoisted and installed separately, the offshore construction workload is heavy and the construction cost is high.

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