Submarine natural gas collection device and method with built-in multi-layer support of buoyancy tank

Abstract

The invention discloses a seabed natural gas collection device with built in buoyancy tank multilayer-rack and a method thereof, and belongs to the natural gas collection technical field; the seabed natural gas collection device comprises a mother ship and a hollow natural gas collection cover; the mother ship is provided with a natural gas storage device; the natural gas storage device is connected with the top of the natural gas collection cover through a gas extraction pipeline; the natural gas collection cover is connected with the bottom of the mother ship through a marine riser; the gas extraction pipeline is arranged in the marine riser; an anchoring system is arranged on the bottom surrounding of the natural gas collection cover; the bottom of the natural gas collection cover is provided with a pressure regulating system; the outer wall of the natural gas collection cover is provided with a propelling system; a density regulating system is arranged in the side wall of the natural gas collection cover; a temperature regulating system and a stirring system are arranged in the natural gas collection cover. In a resolving, collecting and extracting process of the natural gas hydrate in the seabed mud, the novel seabed natural gas collection device can solve the natural gas escaping and leaking problems.

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 built-in buoyant tank multi-layer support, mainly solve the natural gas hydrate in the seabed mud bed, in the process of decomposing, collecting and exploiting, The problem of escape and leakage of natural gas will not be caused. The present invention breaks through the conventional thinking mode, and cleverly uses pressure regulation to form negative pressure and temperature regulation system to increase the temperature, so as to promote the decomposition of natural gas hydrate in the seabed mud bed, which is beneficial to the hydration of seabed natural gas The exploitation of natural gas can greatly improve the recovery rate of natural gas, and 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 and the collection efficiency is high , can be reused many times

Images