US Patent Issued to Reelwell AS on Aug. 12 for "Method and apparatus to establish a geothermal well for closed loop fluid circulation and geothermal heat extraction" (Norwegian Inventor)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,672, issued on Aug. 12, was assigned to Reelwell AS (Sola, Norway).

"Method and apparatus to establish a geothermal well for closed loop fluid circulation and geothermal heat extraction" was invented by Ola M. Vestavik (Fosnavag, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method to establish a well using a nested drill/completion string. The nested drill/completion string includes an inner pipe nested in an outer pipe, a flow crossover disposed at an end of the nested drill string and a drill bit disposed to one side of the flow crossover. Drilling fluid is pumped into the well through a first annular space between the inner pipe and th...