Submarine natural gas collection device and method heated by circulating hot water pipeline with built-in buoyancy tank

Abstract

The invention discloses a seabed natural gas collecting device and method with built-in buoyancy tanks and hot water pipelines for heating, and belongs to the technical field of natural gas collection. The seabed natural gas collecting device comprises a primary boat and a hollow natural gas collecting hood, wherein a natural gas collecting and storing device is arranged on the primary boat and connected to the top of the natural gas collecting hood by a gas collecting pipeline; the natural gas collecting hood is connected to the bottom of the primary boat by a water isolating pipe; a gas collecting pipeline is arranged in the water isolating pipe; anchoring systems are arranged around the bottom of the natural gas collecting hood; pressure adjusting systems are arranged on the bottom of the natural gas collecting hood; propelling systems are arranged on the outer wall of the natural gas collecting hood; a density adjusting system is arranged on the side wall of the natural gas collecting hood; and a temperature adjusting system and a stirring system are arranged in the natural gas collecting hood. According to the seabed natural gas collecting device and method, the problem that for natural gas hydrate in seabed mud bed, natural gas escape and leakage are caused in the decomposing collection and exploiting processes is mainly solved.

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-mentioned existing problems, provide a seabed natural gas collection device and method with a built-in buoyancy tank circulating hot water pipeline heating, mainly solve the natural gas hydrate in the seabed mud bed, in the process of decomposing, collecting and exploiting In the process, the problem of escape and leakage of natural gas will not be formed. The present invention breaks through the conventional thinking mode and skillfully uses pressure regulation to form negative pressure and temperature regulation system to increase temperature to promote the decomposition of natural gas hydrate in the seabed mud bed, which is beneficial to the seabed. The exploitation of natural gas hydrate, then greatly improves the collection rate of natural gas, provides 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 collection of natural gas is convenient and convenient. High efficiency, can be reused many times

Images