Title:
MULTI-BRANCH GEOTHERMAL WELL SYSTEM AND CONSTRUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/082412
Kind Code:
A1
Abstract:
A multi-branch geothermal well system, comprising an overground heat exchange unit and an underground heat exchange unit. The underground heat exchange unit comprises a geothermal well and a heat exchange pipe; the heat exchange pipe is arranged in the geothermal well and communicates with the overground heat exchange unit; the geothermal well comprises a main well (1) and a plurality of branch wells; the main well (1) is a straight well; at least one fixed sleeve is provided on the inner wall of the main well (1), and the fixed sleeve extends in the length direction of the main well (1); a plurality of branch wells obliquely arranged downwards are formed in an open hole portion and/or the fixed sleeve of the main well (1), heat exchange pipes are provided in the plurality of branch wells and the main well (1), plugging layers are provided at the joints of the heat exchange pipes and the branch wells and at the joints of the heat exchange pipes and the main well (1), and the heat exchange pipes are gravity heat pipes or coaxial sleeves. According to the system, the main well (1) is shared, and the multi-branch structure is used in a deep layer with high geothermal temperature, thereby increasing the heat exchange area, and increasing the heat collection amount of a single well.
Inventors:
LI LONG (CN)
WANG JUNYI (CN)
JU GUIDONG (CN)
JIANG FANGMING (CN)
HUANG WENBO (CN)
CHEN JUANWEN (CN)
WANG JUNYI (CN)
JU GUIDONG (CN)
JIANG FANGMING (CN)
HUANG WENBO (CN)
CHEN JUANWEN (CN)
Application Number:
PCT/CN2022/139329
Publication Date:
April 25, 2024
Filing Date:
December 15, 2022
Export Citation:
Assignee:
SHUANGLIANG ECO ENERGY SYSTEM CO LTD (CN)
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
International Classes:
F24T10/20; F24T10/17
Domestic Patent References:
| WO2021145776A1 | 2021-07-22 |
Foreign References:
| CN109798091A | 2019-05-24 | |||
| CN110986401A | 2020-04-10 | |||
| CN106285475A | 2017-01-04 | |||
| CN111043780A | 2020-04-21 | |||
| CN110748293A | 2020-02-04 | |||
| CN114278270A | 2022-04-05 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
Download PDF: