Deep water stone throwing method and device

Abstract

The invention discloses a deep water stone throwing method and device. The deep water stone throwing method includes the steps that S1, a stone throwing boat conveys stone to the position near a region where the stone is thrown; S2, a stone fall detection device is installed at the first end of a telescopic first stone fall pipe, and the first stone fall pipe is placed in water; S3, the second end of the first stone fall pipe is sequentially connected with a plurality of second stone fall pipes and a third stone fall pipe with the side faces provided with water inlets till the stone fall detection device descends above a marine pipeline; the first stone fall pipe, the second stone fall pipes and the third stone fall pipe are sequentially communicated to form a stone fall pipeline allowing the stone to fall onto the pipeline, and the third stone fall pipe is located at the upper end of the stone fall pipeline; S4, the stone fall detection device guides the stone fall pipeline to move above a route of the pipeline, the stone falls onto the pipeline from the stone throwing boat through the stone fall pipeline, and stone layers covering the pipeline are formed. The operating water depth is large, adaptive geologic structures are wider, the deep water stone throwing method and device adapt to more complex sea conditions, and working efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of marine engineering, in particular to a method and equipment for riprapping rocks in deep water. Background technique [0002] In offshore oil and gas development, underwater facilities (subsea pipelines, umbilical cables, cables, etc.) are often damaged due to factors such as uneven seabed, unstable geological conditions, and artificial dropping of heavy objects. There are many measures to protect the stability and safety of underwater facilities, such as trenching, concrete briquetting, sand bag backfill, sand bag support, underwater riprap, etc. These measures have their own advantages, and sometimes several measures will be combined according to the site conditions. Application, under normal environmental conditions, the cost factor and technical feasibility should be considered in choosing the most effective and economical solution. [0003] As one of the traditional underwater facility protection me...

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Problems solved by technology

[0006] The underwater riprap carried out by traditional riprap boats has shallow water depth and low precision, and has not been widely used in deepwater offshore oil development projects.

However, as the world's offshore oil development tends to be deep-water, and the deep-sea geological structure is complicated, simple trenching has been difficult to achieve the purpose of protecting the stability of deep-water underwater production facilities. Therefore, it is necessary to design a deep-water rock dumping equipment to solve the problem The aforementioned issues

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