Turbine lifting device for fluidized exploitation of natural-gas hydrate

Abstract

The invention discloses a turbine lifting device for fluidized exploitation of natural-gas hydrate. The turbine lifting device comprises an upper joint, a turbine pump, a bridge-type channel, a universal-shaft assembly, a turbine motor and a lower joint, wherein the upper joint is connected with the turbine pump and a sleeve; the bridge-type channel is connected with the turbine pump and the turbine motor; the upper part of the universal-shaft assembly is connected with a central shaft of the turbine motor, and the lower part of the universal-shaft assembly is connected with a central shaft ofthe turbine pump; the universal-shaft assembly is positioned in a sealing cavity of the bridge-type channel; the lower joint is connected with the turbine motor and a sleeve. The turbine lifting device disclosed by the invention has the beneficial effects that power can be provided for jet crushing and mechanical crushing of the hydrate and lifting of hydrate slurry simultaneously, so that the drilling-down time and the cost can be saved and the development period can be shortened; the turbine motor and the turbine pump are used as power and lifting equipment, so that the operation of the turbine lifting device is smooth; the gas lift effect can be achieved by utilizing the phase-stage change of the hydrate, and the energy utilization efficiency and the lifting efficiency can be improved.

Description

[0001] The invention belongs to the technical field of natural gas hydrate exploitation, and relates to a natural gas hydrate exploitation lifting device, in particular to a turbine lifting device for natural gas hydrate fluidization exploitation. Background technique [0002] Natural gas hydrate, also known as combustible ice, is a clean and high-quality energy source. It has huge global reserves. As a new unconventional oil and gas resource with extremely high value, it has been a long-term research hotspot in the oil and gas industry and occupies an important position in the future energy strategy, but its commercial exploitation has not yet been realized internationally. At present, the traditional mining methods mainly include thermal stimulation method, decompression method, chemical reagent method, carbon dioxide replacement method and so on. Among various natural gas hydrate production methods, solid-state fluidization production, as a set of theoretically and practi...

AI Technical Summary

Problems solved by technology

However, due to the special environment of offshore natural gas hydrate exploitation, the existing oil and gas equipment cannot meet the demand, especially there is no mature equipment that can realize hydrate crushing and pumping recovery at the same time

In the prior art, although there are hydrate mining and lifting devices, there are common problems such as low energy utilization efficiency and low return efficiency of ore slurry

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