Abstract The URRS makes multiple 25 to 150 ft (8 to 46 m) radiais in one or more layers. The range of stable production enhancement with multiple radiais in both light and heavy oil wells in various formations varies from a two times (200%) to as much as a ten times (1,000%) improvement depending on reservoir and wellbore conditions. The average production improvement is two times to four times (200% to 400%). The comparison is made with respect to either (a) the production in a well after radial placement compared to the production prior to radial placement or (b) the production in a new well with radiais compared to similar offset vertical wells. This paper examines the value of multiple radiais in penetrating skin or near wellbore damage (Figure 1);the calculated magnitude of oil production improvement by penetrating near wellbore damage; andtypical light oil field results involving stable production in a new well with radiais, and a reentered well with radiais.