SUBSURFACE ANODE GROUNDING DISK Russian patent published in 2003 - IPC

FIELD: subsurface anode grounding disks; protection of underground pipe lines against electrochemical corrosion. SUBSTANCE: proposed grounding disk includes two concentric steel pipes with space between them filled with coke breeze; welded to inner pipe by two-sided weld seam over entire length of its working part are steel disks at angle of 40 deg. to level; these disks embrace pipe at diameter ensuring clearance between edge of disk and inner surface of outer pipe no less than 7 magnitudes of maximum size of largest particle of coke breeze. Pipes are made in form of prefabricated sections whose length is equal to or is compatible with length of industrial range of pipes. Proposed disk reduces welding and assembly jobs in mounting the grounding disk in well at smooth drainage of electric current from disk. EFFECT: enhanced efficiency and reliability; increased service life. 2 dwg