US 12,332,124 B2
Deep well grounding electrode and deep well grounding electrode monitoring system
Gang Liu, Guangdong (CN); Lu Qu, Guangdong (CN); Yi Zhang, Guangdong (CN); Shangmao Hu, Guangdong (CN); Taishan Hu, Guangdong (CN); Minchuan Liao, Guangdong (CN); Lei Jia, Guangdong (CN); Licheng Li, Guangdong (CN); Hong Rao, Guangdong (CN); Hansheng Cai, Guangdong (CN); Ruifa Feng, Guangdong (CN); Hao Liu, Guangdong (CN); Qi Mei, Guangdong (CN); Jian Shi, Guangdong (CN); and Ruihan Qi, Guangdong (CN)
Assigned to ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID, Guangdong (CN); and CHINA SOUTHERN POWER GRID, Guangdong (CN)
Appl. No. 17/638,807
Filed by ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, Guangdong (CN); and CHINA SOUTHERN POWER GRID, Guangdong (CN)
PCT Filed Jul. 24, 2020, PCT No. PCT/CN2020/103908
§ 371(c)(1), (2) Date Feb. 26, 2022,
PCT Pub. No. WO2021/036608, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 201910789076.X (CN), filed on Aug. 26, 2019.
Prior Publication US 2022/0334005 A1, Oct. 20, 2022
Int. Cl. G01K 1/08 (2021.01); G01K 11/32 (2021.01); G01K 1/10 (2006.01); G01K 1/12 (2006.01)
CPC G01K 11/32 (2013.01) [G01K 1/08 (2013.01); G01K 1/10 (2013.01); G01K 1/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A deep well grounding electrode, located in a well body, wherein the deep well grounding electrode comprises a feeding rod, a feeding head, a steel casing with a diameter less than a bore diameter of the well body, a temperature measuring optical cable, an exhaust pipe and a drainage cable;
the steel casing is located inside the well body, a distance between the top of the steel casing and the ground is defined as a first clearance distance, and the steel casing is coated with an insulation and anti-corrosion layer from a certain depth of the deep well to the top of the steel casing;
the feeding head is located at the bottom of the steel casing, and the feeding head comprises a grouting device configured to pump coke slurry;
the feeding rod, the temperature measuring optical cable, the exhaust pipe and the drainage cable are located inside the steel casing;
a distance between the top of the feeding rod and the ground is defined as a second clearance distance, and the feeding rod extends by the second clearance distance from the bottom of the steel casing;
the temperature measuring optical cable extends from the bottom end of the feeding rod to a monitoring module;
the exhaust pipe extends from the bottom end of the feeding rod to the ground;
one end of the drainage cable is welded to the feeding rod by an exothermic welding point, and the other end the drainage cable extends to the monitoring module, and the drainage cable is fixed on the feeding rod by a bolt,
wherein the certain depth of the deep well is defined as an insulation depth, a section of the deep well grounding electrode from the ground to the insulation depth is defined as an insulation section, and a section of the deep well grounding electrode from the insulation depth to the bottom of the steel casing is defined as a diffusing section; the insulation section is filled with gravel and the diffusing section is filled with coke.