Submarine natural gas collection device and method heated by circulating hot water in stepped tubes of outer buoyancy tank

Abstract

The invention discloses a seabed natural gas collection device and method heated by circulating hot water in stepped tubes of an outer buoyancy tank, and belongs to the technical field of natural gas collection. The invention comprises a mother ship and an inner hollow natural gas collection cover. The natural gas collection and storage device is provided on the mother ship. The natural gas storage and storage device is connected to the top of the natural gas collection cover through a gas production pipeline, and the natural gas collection cover is connected to the mother ship through a water riser At the bottom, the gas production pipeline is arranged in the water riser; the bottom of the natural gas collection cover is provided with an anchor system, a pressure regulation system is provided at the bottom of the natural gas collection cover, and a propulsion system is provided on the outer wall of the natural gas collection cover. A density adjustment system is provided on the outer wall of the natural gas collection hood, and a temperature adjustment system and an agitation system are provided inside the natural gas collection hood. The invention mainly solves the problem that the gas hydrate in the seabed mud bed will not form the escape and leakage of natural gas during the process of decomposing, collecting and exploiting.

Description

technical field [0001] The invention relates to the technical field of natural gas collection, in particular to the seabed natural gas hydrate collection technology. Background technique [0002] Submarine natural gas hydrate is a crystal formed by the combination of methane gas and water molecules in the low-temperature and high-pressure environment of the seabed. It is a clean energy with huge reserves, and it is expected to replace oil and coal as the main energy source. Gas hydrates are widely distributed in seabed sediments, and have the characteristics of large reserves, weak cementation, and poor stability. Once the temperature and pressure conditions in the area change, it may cause a large amount of decomposition, gasification and free release of seabed gas hydrates. [0003] Since natural gas hydrate is mainly decomposed into methane gas and water, however, methane gas is a greenhouse gas, and a large amount of release into the atmosphere will cause the greenhouse ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the above existing problems, provide a seabed natural gas collection device and method heated by circulating hot water in the stepped tube of the outer buoyancy tank, which mainly solves the problem of natural gas hydrate in the seabed mud bed, which is decomposed, collected and exploited. During the process, the problem of natural gas escape and leakage will not be formed. The present invention breaks through the conventional thinking mode and skillfully uses pressure regulation to form a negative pressure and temperature regulation system to increase the temperature to promote the decomposition of natural gas hydrate in the seabed mud bed, which is beneficial to The exploitation of seabed natural gas hydrate, and then greatly improve the collection rate of natural gas, provide a new direction for the exploitation of seabed natural gas hydrate; It can be seen that the present invention can ensure stable production through the control of density, pressure and temperature, and the natural gas collection is convenient, High collection efficiency, can be reused many times

Images