Title:
SYSTEM AND METHOD FOR EXPLOITING NATURAL GAS HYDRATE BY UNDERGROUND GAS-LIQUID SYNERGISTIC PRESSURE REDUCTION
Document Type and Number:
WIPO Patent Application WO/2023/124449
Kind Code:
A1
Abstract:
Disclosed in the present invention is a system and method for exploiting natural gas hydrate by underground gas-liquid synergistic pressure reduction. The system comprises a casing pipe used for constructing a mining well .The upper end of the mining well is connected to a gas production collection pipeline. The gas production collection pipeline is used for being connected to a gas production recovery system. Perforated channels are distributed in the section of the casing pipe located on a natural gas hydrate reservoir layer. A wellbore tubular assembly is installed in the mining well. The wellbore tubular assembly comprises an outer tubing, a production tubing, and an auxiliary riser. A first one-way valve is installed at the bottom of the outer tubing. An air supply pipeline is connected to the upper portion of the outer tubing. A flow controller is installed in the air supply pipeline. The production tubing is installed in the outer tubing, and the space between the two is used as a water storage chamber. A second one-way valve is installed at the bottom of the production tubing. The auxiliary riser is installed in the production tubing. The solution of the present invention can be quickly applied to industrial mining of natural gas hydrate.
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Inventors:
LI XIAOSEN (CN)
RUAN XUKE (CN)
CHEN ZHAOYANG (CN)
LI GANG (CN)
ZHANG YU (CN)
WANG YI (CN)
YAN KEFENG (CN)
ZHOU JIAYUAN (CN)
RUAN XUKE (CN)
CHEN ZHAOYANG (CN)
LI GANG (CN)
ZHANG YU (CN)
WANG YI (CN)
YAN KEFENG (CN)
ZHOU JIAYUAN (CN)
Application Number:
PCT/CN2022/126879
Publication Date:
July 06, 2023
Filing Date:
October 24, 2022
Export Citation:
Assignee:
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
International Classes:
E21B43/01; E21B41/00; E21B43/02; E21B43/34; E21B47/06
Domestic Patent References:
| WO2008129292A2 | 2008-10-30 |
Foreign References:
| CN109915085A | 2019-06-21 | |||
| CN105863567A | 2016-08-17 | |||
| CN114198066A | 2022-03-18 | |||
| CN112081559A | 2020-12-15 | |||
| CN102213090A | 2011-10-12 | |||
| CN103867165A | 2014-06-18 | |||
| CN114135252A | 2022-03-04 | |||
| RU2412337C1 | 2011-02-20 |
Other References:
DENG BIN, DAI GANCE: "Numerical simulation of surface renewal frequency on vertically rotating disc", CIESC JOURNAL, HUAXUE GONGYE CHUBANSHE, CN, vol. 66, no. 4, 1 April 2015 (2015-04-01), CN , pages 1407 - 1416, XP093075188, ISSN: 0438-1157, DOI: 10.11949/j.issn.0438-1157.20141688
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (CN)
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